CN115559794A - Cogeneration heat storage type stable steam supply system and control method thereof - Google Patents

Abstract

The application discloses a cogeneration heat storage type stable steam supply system and its control method. The system includes: normal gas source inlet, high temperature gas source inlet, low temperature gas source inlet, adiabatic layered heat storage device, heat storage process steam Mixer, heat storage steam flow regulating valve, heat storage process steam supply temperature regulating valve, high temperature gas source heat release switch valve, heat release process steam mixer, heat release steam flow regulating valve, heat release process steam supply temperature regulating valve, Low temperature gas source heat absorption switch valve, system steam supply pressure stabilization mixer and steam supply pressure stabilization regulating valve, adiabatic layered heat storage device includes: device heat storage process steam inlet, device heat storage process steam outlet, device heat release process steam Inlet and outlet of device heat release process steam. This system can ensure that the combined heat and power unit can not only store heat or release heat during the peak-shaving period of the power grid, but also produce heat in a stable manner, which improves the stability and reliability of external heat supply.

Description

Combined heat and power generation heat storage type stable steam supply system and its control method

technical field

The present application relates to the technical field of heat storage and steam supply, in particular to a cogeneration heat storage type stable steam supply system and a control method thereof.

Background technique

In the case of increasingly tight energy sources, combined heat and power generation is one of the technologies commonly used in thermal power plants to save energy, reduce consumption, and improve energy utilization. Cogeneration, combined heat and power (CHP for short) refers to the use of generator sets to generate electricity and useful heat at the same time.

In recent years, with the development of new energy technologies, the demand for new energy consumption in various regions is increasing. The power generation operation mechanism has forced thermal power plants to deeply participate in the peak-shaving operation of the power grid, and the generator sets have continuously dropped to the minimum limit operating load, which has seriously affected the heat supply production of thermal power plants.

In the related technology, when the thermal power generation unit participates in the peak regulation of the power grid, cogeneration can only choose to give priority to ensuring heat supply, or to meet the peak regulation demand of the power grid first. However, this method will affect the power supply and cause resource loss when the heat supply is given priority, and will reduce the quality of external heating production when the peak-shaving demand of the power grid is given priority. Therefore, how to ensure that the combined heat and power unit can not only cooperate with peak shaving during the "peak and valley period" of the power grid, but also carry out stable heating production has become an urgent problem to be solved.

Contents of the invention

The purpose of this application is to solve one of the above-mentioned technical problems at least to a certain extent.

For this reason, the first purpose of this application is to propose a cogeneration heat storage type stable steam supply system. Based on the adiabatic layered heat storage device, the system introduces three kinds of steam sources: normal, high temperature and low temperature, sets temperature and pressure regulating valves and steam mixers, and optimizes the configuration of the process piping system to ensure that the combined heat and power units are in the power grid. During the peak shaving period, it can not only carry out heat storage or heat release operation, but also stably carry out heat supply production, which improves the stability and reliability of external heat supply. Moreover, it is easy to combine with effective control strategies, simplifies the operation difficulty of the system, and eliminates the influence of various possible interference factors on the system function. The system has reasonable design and simple operation control, which greatly enriches the application scenarios of heat storage and steam supply technology.

The second purpose of the present application is to propose a control method for a cogeneration heat storage type stable steam supply system.

The third object of the present application is to propose a non-transitory computer-readable storage medium.

In order to achieve the above purpose, the embodiment of the first aspect of the present application proposes a cogeneration heat storage type stable steam supply system, the system includes: normal gas source inlet, high temperature gas source inlet, low temperature gas source inlet, adiabatic layered storage Heat device, steam mixer for heat storage process, heat storage steam flow regulating valve, steam supply temperature regulating valve for heat storage process, heat release switch valve for high temperature gas source, steam mixer for heat release process, heat release steam flow regulating valve, heat release Process steam supply temperature regulating valve, low-temperature gas source heat absorption switch valve, system steam supply pressure stabilizing mixer and steam supply pressure stabilizing regulating valve, the adiabatic layered heat storage device includes: device heat storage process steam inlet, device heat storage Process steam outlet, device heat release process steam inlet and device heat release process steam outlet, wherein,

The high-temperature gas source inlet is connected to the heat storage process steam inlet of the device, and the high-temperature gas source inlet is also connected to the first end of the heat storage process steam supply temperature regulating valve through the heat storage process steam bypass pipe;

The heat storage process steam outlet of the device is connected to the first end of the heat storage steam flow regulating valve, and the second end of the heat storage steam flow regulating valve is connected to the first end of the heat storage process steam mixer, The second end of the heat storage process steam supply temperature regulating valve is connected to the second end of the heat storage process steam mixer, and the third end of the heat storage process steam mixer is connected to the high temperature gas source heat release switch The first end of the valve is connected;

The low-temperature gas source inlet is connected to the heat release process steam inlet of the device, and the low-temperature gas source inlet is also connected to the first end of the heat release process steam supply temperature regulating valve through the heat release process steam bypass pipe;

The heat release process steam outlet of the device is connected to the first end of the heat release steam flow regulating valve, and the second end of the heat release steam flow regulating valve is connected to the first end of the heat release process steam mixer, The second end of the heat release process steam supply temperature regulating valve is connected to the second end of the heat release process steam mixer, and the third end of the heat release process steam mixer is connected to the low temperature air source heat absorption switch The first end of the valve is connected;

The second end of the high-temperature air source exothermic on-off valve and the second end of the low-temperature air source endothermic on-off valve are connected to the first end of the system steam supply regulator mixer, and the normal air source inlet is connected to the The first end of the steam supply pressure regulator valve is connected, the second end of the steam supply regulator valve is connected with the second end of the system steam supply regulator mixer, and the system steam supply regulator mixer The third end of the device is connected with the external steam supply main pipe of the system.

In addition, the cogeneration heat storage type stable steam supply system of the embodiment of the present application also has the following additional technical features:

Optionally, in some embodiments, there is a temperature measuring point at the steam outlet of the heat storage process of the device between the steam outlet of the heat storage process of the device and the first end of the flow regulating valve of the heat storage steam; the steam mixer of the heat storage process Between the third end of the high-temperature gas source heat release switch valve and the first end of the heat storage process steam supply temperature and pressure measuring point of the device; the heat release process steam outlet of the device and the heat release steam flow regulating valve There is a temperature measuring point for the steam outlet of the device heat release process between the first end; there is a device heat release process supply point between the third end of the heat release process steam mixer and the first end of the low temperature gas source heat absorption switch valve. Steam temperature and pressure measuring points; the external steam supply main pipe has system external steam supply temperature and pressure measuring points.

Optionally, in some embodiments, the normal gas source inlet, the high-temperature gas source inlet and the low-temperature gas source inlet are used to transfer the normal gas source and high-temperature gas source introduced from the thermal system of the combined heat and power unit Corresponding to the low-temperature gas source, it is introduced into the cogeneration heat storage type stable steam supply system; wherein, the parameters of the normal gas source are the target parameters of the external gas supply of the cogeneration heat storage type stable steam supply system, and the The parameter of the high temperature gas source is higher than the target parameter, and the parameter of the low temperature gas source is lower than the target parameter.

In order to achieve the above purpose, the embodiment of the second aspect of the present invention proposes a control method for a cogeneration heat storage type stable steam supply system. A heat storage type stable steam supply system, the method comprising:

Judging the current operating status of the combined heat and power unit;

When the combined heat and power unit is in a normal operating state, close the high-temperature gas source heat release switch valve and the low-temperature gas source heat absorption switch valve, and adjust the introduced normal gas source through the steam supply regulator valve;

When the cogeneration unit is in the peak-shaving state, determine the gas supply operation mode of the cogeneration heat storage type stable steam supply system with the goal of stabilizing the external gas supply parameters of the system;

According to the determination result, the cogeneration heat storage type stable steam supply system is controlled to execute the heat storage steam supply operation mode or the heat release steam supply operation mode.

In addition, the control method of the cogeneration heat storage type stable steam supply system in the embodiment of the present application also has the following additional technical features:

Optionally, in some embodiments, controlling the cogeneration heat storage type stable steam supply system to implement the heat storage steam supply operation mode includes: opening the high temperature gas source heat release switch valve and closing the low temperature gas source Heat-absorbing switch valve; control a part of high-temperature steam to enter the adiabatic layered heat storage device to release heat and cool down, then pass through the heat storage steam flow regulating valve and the other part directly passes through the heat storage process steam supply temperature regulating valve. Mixing in the mixer; based on the PID closed-loop control mode, the outlet pressure of the heat storage process steam mixer is automatically adjusted through the heat storage steam flow regulating valve, and the heat storage process steam is automatically adjusted through the heat storage process steam supply temperature regulating valve outlet temperature of the mixer.

Optionally, in some embodiments, controlling the cogeneration heat storage type stable steam supply system to implement the heat release steam supply operation mode includes: opening the low-temperature gas source heat absorption switch valve and closing the high-temperature gas source Heat release switch valve; control a part of the low-temperature steam to enter the adiabatic layered heat storage device to absorb heat and heat up, then pass through the heat release steam flow regulating valve and the other part directly passes through the heat release process steam supply temperature regulating valve. Mixing in the mixer; based on the PID closed-loop control mode, the outlet pressure of the heat release process steam mixer is automatically adjusted through the heat release steam flow regulating valve, and the heat release process steam mixer is automatically adjusted through the heat release process steam supply temperature regulating valve the outlet temperature.

Optionally, in some embodiments, the method further includes: closing the steam supply temperature regulating valve of the thermal storage process to the minimum valve position, or when the real-time monitored temperature at the outlet of the device is greater than the target supply steam temperature, closing The high-temperature gas source heat release switch valve stops the heat storage steam supply operation mode, and automatically switches to the normal gas source steam supply.

Optionally, in some embodiments, the method further includes: opening the steam supply temperature regulating valve to the maximum valve position in the heat release process, or when the real-time monitoring temperature at the outlet of the device is lower than the target supply steam temperature, closing the The low-temperature air source heat absorption switching valve stops the heat release steam supply operation mode, and automatically switches to the normal air source steam supply.

Optionally, in some embodiments, the method further includes: during the execution of the heat storage steam supply operation mode or the heat release steam supply operation mode, if the output high-temperature steam flow or low-temperature steam flow cannot To meet the external steam supply pressure requirements, introduce a normal gas source, and control the normal gas source to pass through the steam supply pressure regulator valve and mix with the steam after heat release or heat absorption in the system steam supply pressure regulator mixer to Keep the steam supply pressure stable.

In order to achieve the above object, the embodiment of the third aspect of the present invention proposes a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned embodiment of the second aspect is implemented. A control method for any one of the cogeneration heat storage type stable steam supply systems.

The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

This application introduces three kinds of steam sources with different parameter levels, rationally sets up adiabatic layered heat storage device and steam mixer, and optimizes the control method of the regulating valve, so that the system has steam heat storage/heat release and constant temperature and pressure stabilization at the same time. The function of steam supply finally enables the combined heat and power unit to realize heat storage and peak-shaving operation without affecting the quality of steam supply. In the stage of heat storage and heat release, the functions of steam heat storage and stable steam supply are realized only by adjusting the steam flow of three different parameter levels drawn from the thermal system of the original unit, with little impact on the thermal system of the original unit. When the operating conditions of the system change, the thermal system of the original unit can be adjusted independently to re-establish the thermal balance without human intervention, which greatly reduces the complexity of the system operation. The control logic is clear and simple, the hardware cost is low, and it is easy to implement in practical applications. Moreover, all operation control functions in this application are completed by regulating valves, which have continuous adjustability, especially when the system switches between normal steam supply, heat storage steam supply, heat release steam supply, etc., no operating parameters will be generated. The sudden change of the system ensures the feasibility of the non-disturbance switching of the system, and minimizes the impact of the system's changing working conditions on the original system. Since the system has the function of undisturbed switching of operating conditions, it also enables the system to realize the function of starting or stopping at any time in any operating mode, and can still maintain the stable operation of external steam supply during the switching process, which greatly enhances the System operation flexibility. The function of the system to supply steam with external stable parameters is the result of the joint action of multiple regulating valves. When modifying and adjusting each regulating valve to follow the set value, the external steam supply parameters of the system can be changed to improve the flexibility of the system operation and ensure the stability of the system. Stability and reliability of external heat supply.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic structural diagram of a cogeneration heat storage type stable steam supply system proposed in the embodiment of the present application;

Fig. 2 is a flow chart of a control method for a cogeneration heat storage type stable steam supply system proposed in an embodiment of the present application;

Fig. 3 is a flow chart of a thermal storage steam supply operation control method proposed in the embodiment of the present application;

Fig. 4 is a flow chart of a heat release steam supply operation control method proposed in the embodiment of the present application.

detailed description

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

It should be noted that, in the embodiment of the present application, thermal energy can be stored and released based on heat storage technology to improve the operational flexibility of cogeneration units and meet the needs of participating in grid peak regulation and heat supply production. However, the coupling application of heat storage technology and combined heat and power units is not mature. Therefore, how to establish a system with heat storage function and stable operation is a problem that needs to be solved at present. Among them, realizing the rapid start and stop of thermal energy storage and release functions, and ensuring the stability and reliability of external steam supply are the key technologies for establishing this system. For this reason, the present application proposes a cogeneration heat storage type stable steam supply system and a control method thereof.

The cogeneration heat storage type stable steam supply system and its control method according to the embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a structural schematic diagram of a cogeneration heat storage type stable steam supply system proposed in the embodiment of the present application. As shown in Fig. 1, the system includes: a normal gas source inlet (1), a high temperature gas source inlet (2) , low temperature gas source inlet (3), adiabatic layered heat storage device (5), heat storage process steam mixer (10), heat storage steam flow regulating valve CV11 (11), heat storage process steam supply temperature regulating valve CV12 ( 12), high temperature gas source heat release switch valve V1 (14), heat release process steam mixer (15), heat release steam flow regulating valve CV21 (16), heat release process steam supply temperature regulating valve CV22 (17), low temperature Air source heat absorption switch valve V2 (19), system steam supply and pressure stabilization mixer (20) and steam supply and pressure stabilization regulating valve CV0 (21), adiabatic layered heat storage device (5) includes: steam inlet for the heat storage process of the device (6), the steam outlet (7) of the heat storage process of the device, the steam inlet (8) of the heat release process of the device and the steam outlet (9) of the heat release process of the device.

Among them, the connection method of the above-mentioned components is shown in Figure 1, the high-temperature gas source inlet (2) is connected with the steam inlet (6) of the heat storage process of the device, and the high-temperature gas source inlet (2) is also passed through the heat storage process steam bypass pipe ( 13) Connect with the first end of the steam supply temperature regulating valve CV12 (12) in the heat storage process.

The steam outlet (7) in the heat storage process of the device is connected to the first end of the heat storage steam flow regulating valve CV11 (11), and the second end of the heat storage steam flow regulating valve CV11 (11) is connected to the heat storage process steam mixer (15) The first end of the heat storage process steam supply temperature regulating valve CV12 (12) is connected to the second end of the heat storage process steam mixer (15), and the third end of the heat storage process steam mixer (15) The end is connected with the first end of the high-temperature gas source exothermic switching valve V1 (14).

The low-temperature gas source inlet (3) is connected to the device heat release process steam inlet (8), and the low-temperature gas source inlet (3) is also connected to the heat release process steam supply temperature regulating valve CV22 (17) through the heat release process steam bypass pipe (18) ) connected to the first end.

The heat release process steam outlet (9) of the device is connected to the first end of the heat release steam flow regulating valve CV21 (16), and the second end of the heat release steam flow regulating valve CV21 (16) is connected to the heat release process steam mixer (15) The first end of the heat release process steam supply temperature regulating valve CV22 (17) is connected to the second end of the heat release process steam mixer (15), and the third end of the heat release process steam mixer (15) The end is connected with the first end of the low-temperature gas source endothermic switch valve V2 (19).

The second end of the high-temperature gas source exothermic on-off valve V1 (14) and the second end of the low-temperature air source heat-absorbing on-off valve V2 (19) are connected to the first end of the system steam supply regulator (20). The source inlet (1) is connected to the first end of the steam supply pressure regulator valve CV0 (21), and the second end of the steam supply pressure regulator valve CV0 (21) is connected to the second end of the system steam supply regulator mixer (20). The third end of the system steam supply regulator (20) is connected with the external steam supply main pipe (4) of the system.

It should be noted that, the first end, the second end or the third end of the above-mentioned component represent different connection ends of the component, and the specifically indicated ports are shown in FIG. 1 . Among them, the adiabatic layered heat storage device (5) absorbs and releases heat through multiple adiabatic heat storage layers to store heat, and the steam mixer can mix a variety of steam with different parameters. The adiabatic layered heat storage device and For the specific structure and working principle of the steam mixer, reference may be made to related technologies, and details will not be repeated here. The purpose of this application is to control the operation of the system through multiple flow or temperature regulating valves. According to the detected pressure and temperature of the steam at the relevant position in the system, the joint action of multiple regulating valves can be adjusted to realize the supply of external stable parameters. steam.

In order to detect the parameters of the steam in the system and facilitate subsequent control, in one embodiment of the present application, as shown in Figure 1, the steam outlet (7) of the heat storage process and the first valve of the heat storage steam flow regulating valve are installed in the system. There is a temperature measuring point (22) at the steam outlet of the device in the heat storage process between one end; between the third end of the steam mixer (10) in the heat storage process and the first end of the high temperature gas source exothermic switch valve V1 (14) The steam supply temperature and pressure measuring point (23) in the heat storage process of the device; there is a steam outlet temperature measuring point in the heat release process of the device between the steam outlet (9) in the heat release process of the device and the first end of the heat release steam flow regulating valve CV21 (16) (24); between the third end of the heat release process steam mixer (15) and the first end of the low-temperature gas source heat absorption switch valve V2 (19), there is a device heat release process steam supply temperature and pressure measuring point (25); The external steam supply main pipe (4) has system external steam supply temperature and pressure measuring points (26). Characters such as t ₀ , t ₁ and p ₀ on each measuring point in the figure indicate the parameters of the steam detected at the measuring point.

During specific implementation, corresponding detection equipment, such as temperature sensors or gas pressure sensors, can be installed at each of the above-mentioned real-time monitoring points to realize real-time detection of passing steam and facilitate the subsequent completion of system control functions.

In one embodiment of the present application, the cogeneration heat storage type stable steam supply system introduces steam gas sources of three parameter levels respectively by the cogeneration unit, the normal gas source inlet (1), the high temperature gas source inlet (2) and the low-temperature gas source inlet (3) are used to respectively transfer the normal steam t _M , high-temperature steam t _H and low-temperature steam t _L introduced from the thermal system of the cogeneration unit into the cogeneration heat storage type stable steam supply system . Among them, the parameters of the normal steam are the target parameters of the expected output of the cogeneration heat storage type stable steam supply system that meet the requirements of the external gas supply, the parameters of the high-temperature steam are higher than the target parameters, and the parameters of the low-temperature steam are lower than the target parameters. The target parameters include The temperature and pressure of the steam provided externally. When the system is in operation, the steam that meets the requirements is led out through the external steam supply main pipe (4) of the system, so as to realize the basic function of energy storage and steam supply of the whole system.

Therefore, this application combines the bypass pipes and main pipes to connect the above-mentioned components, various types of gas source inlets and steam inlets and outlets of the device to form a system including different steam processes, which is convenient for subsequent heat storage combined with corresponding control methods Peak shaving operation.

To sum up, the cogeneration heat storage type stable steam supply system implemented in this application is based on the adiabatic layered heat storage device, by introducing three steam sources of normal, high temperature, and low temperature, setting temperature, pressure regulating valve and steam Mixer, and optimize the configuration of the process pipeline system, to ensure that the cogeneration unit can not only store heat or release heat during the peak shaving period of the power grid, but also perform heat supply production stably, improving the stability and reliability of external heat supply . Moreover, it is easy to combine with effective control strategies, simplifies the operation difficulty of the system, and eliminates the influence of various possible interference factors on the system function. The system has reasonable design and simple operation control, which greatly enriches the application scenarios of heat storage and steam supply technology.

In order to explain more clearly the specific implementation process of adjusting the steam provided to the outside during the heat storage peak shaving operation through the above-mentioned cogeneration heat storage type stable steam supply system, the following uses a thermoelectric system proposed in the embodiment of this application The control method of the cogeneration heat storage type stable steam supply system is described in detail. This method is applied to the cogeneration heat storage type stable steam supply system in the above embodiment, that is, the cogeneration heat storage type stable steam supply system targeted by the control method of the cogeneration heat storage type stable steam supply system is For the system described in the above implementation, the components included in the system and the connection manners of the components are as described in the above embodiments, and will not be repeated here.

Fig. 2 is a flowchart of a control method for a cogeneration heat storage type stable steam supply system proposed in the embodiment of the present application. As shown in Fig. 2, the method includes the following steps:

Step S201: Determine the current operating state of the combined heat and power unit.

Specifically, judging the operating state of the unit means judging whether the combined heat and power unit currently participates in power grid peak regulation or is in a normal operating state.

In one embodiment of the present application, the current status of the cogeneration unit can be judged by detecting whether the cogeneration unit has received the peak regulation command, detecting the electric energy parameters output by the cogeneration unit, or detecting the operating parameters of the unit. Operating status.

Step S202: When the combined heat and power unit is in normal operation, close the high-temperature air source heat release on-off valve and the low-temperature air source heat-absorbing on-off valve, and regulate the introduced normal air source through the steam supply regulator valve.

Specifically, the control method of this application performs different controls on the cogeneration heat storage type stable steam supply system according to the current operating state of the cogeneration unit, and controls the operation of the system through multiple flow or temperature regulating valves. Multiple regulating valves work together to adjust, which can realize external stable parameter steam supply.

Wherein, when the combined heat and power unit is in a normal operating state, the above-mentioned normal air source introduced from the thermal system of the combined heat and power unit supplies steam to the outside. During specific implementation, as a possible implementation, when the system is in normal operation, control the high-temperature gas source heat release switch valve V1 (14) and the low-temperature gas source heat absorption switch valve V2 (19) to be closed, and the normal gas source Introduce into the system through the normal air supply inlet (1). At this time, the steam supply pressure regulating valve CV0 (21) is put into automatic operation, adopting the proportional-integral-differential control (Proportion Integration Differentiation, referred to as PID) closed-loop control mode to operate, and the adjustment value is the stable steam supply system of cogeneration heat storage type output steam pressure.

Step S203: When the combined heat and power unit is in the peak regulation state, determine the gas supply operation mode of the combined heat and power storage type stable steam supply system with the goal of stabilizing the external gas supply parameters of the system.

Specifically, when the cogeneration unit is in peak-shaving operation, combined with the steam parameters output by the unit’s current peak-shaving coefficient and the required external gas supply target parameters, the system’s external gas supply parameters are stabilized to determine the cogeneration Gas supply operation mode of heat storage type stable steam supply system. In the embodiment of the present application, the air supply operation mode of the cogeneration heat storage type stable steam supply system includes the heat storage steam supply operation mode and the heat release steam supply operation mode, which can be specifically determined according to the heat storage demand of the current system.

Step S204: According to the determination result, the cogeneration heat storage type stable steam supply system is controlled to execute the heat storage steam supply operation mode or the heat release steam supply operation mode.

Specifically, after the steam supply operation mode to be executed by the cogeneration heat storage type stable steam supply system is determined according to the determination result, the cogeneration heat storage type stable steam supply system is controlled to operate in a corresponding mode. When the system is running with heat storage steam supply or heat release steam supply operation, its external steam supply parameters are automatically adjusted and controlled through the heat storage or heat release steam flow regulating valve and temperature regulating valve.

In one embodiment of the present application, when the system executes the thermal storage steam supply operation mode, the high-temperature steam source of the unit is introduced, and after the heat is released in the heat storage device, the temperature and pressure are adjusted to meet the external steam supply parameter requirements to achieve stable steam supply run. When the system executes the heat release steam supply operation mode, the system introduces the low-temperature steam source of the unit, and after absorbing heat in the heat storage device, the temperature and pressure are adjusted to meet the external steam supply parameters to achieve stable steam supply operation.

In order to more clearly illustrate the specific implementation process of this application to control the cogeneration heat storage type stable steam supply system to perform heat storage steam supply operation and heat release steam supply operation, the following two storage methods for the unit proposed in the embodiment of this application The control method for hot steam supply operation and the control method for heat release steam supply operation are described as examples.

Fig. 3 is a flow chart of a thermal storage steam supply operation control method proposed in the embodiment of the present application. As shown in Fig. 3, the method includes the following steps:

Step S301: Open the on-off valve for exothermic heat of the high-temperature air source and close the on-off valve for heat absorption of the low-temperature air source.

Specifically, when the system is running in heat storage and steam supply mode, the high-temperature gas source heat release switch valve V1 (14) is controlled to open, and the low-temperature gas source heat absorption switch valve V2 (19) is closed to transfer the high-temperature steam t _H The production unit is introduced into the system.

Step S302: After controlling a part of high-temperature steam to enter the adiabatic layered heat storage device to release heat and cool down, the high-temperature steam passing through the heat storage steam flow regulating valve and the other part directly passing through the heat storage process steam supply temperature regulating valve is in the heat storage process steam mixer mix in.

Specifically, a part of the high-temperature steam introduced into the adiabatic layered heat storage device (5) releases heat and cools down (the heat storage medium of the device absorbs heat) and completes the heat storage function of the system. The other part of the high-temperature steam directly passing through the heat storage process steam supply temperature regulating valve CV12 (12) is mixed in the heat storage process steam mixer (10) to stabilize the pressure and temperature of the external air supply.

Step S303: Based on the PID closed-loop control method, the outlet pressure of the heat storage process steam mixer is automatically adjusted through the heat storage steam flow regulating valve, and the outlet temperature of the heat storage process steam mixer is automatically adjusted through the heat storage process steam supply temperature regulating valve.

Specifically, when the system is running in the heat storage steam supply mode, the heat storage steam flow regulating valve CV11 (11) automatically adjusts the stable steam supply pressure, and the heat storage process steam supply temperature regulating valve CV12 (12) automatically adjusts the stable steam supply temperature to realize Stable steam supply function during the heat storage process of the system. That is, the steam released from the adiabatic layered heat storage device (5) passes through the heat storage steam flow regulating valve CV11 (11) to stabilize the steam supply pressure, and then enters the heat storage process steam mixer. Furthermore, this part of the heat-released and stabilized high-temperature steam is mixed with the high-temperature steam directly flowing through the heat storage process steam supply temperature regulating valve CV12 (12) in the mixer, and after stabilizing the external supply steam temperature, it passes through the high-temperature gas source heat release switch valve After V1 (14), it enters the system steam supply regulator (20).

During specific implementation, when the system is in the thermal storage steam supply operation mode, the high-temperature gas source heat release switch valve is in an open state, and high-temperature steam is introduced into the system. At this time, the heat storage steam flow regulating valve is put into automatic operation, and the PID closed-loop control mode is adopted to operate, and the adjustment value is the outlet pressure of the mixer in the heat storage process of the device. Further, the high-temperature steam releases heat and cools down through the adiabatic layered heat storage device. If the outlet temperature of the steam in the heat storage process of the device is less than or equal to the set value of the steam supply temperature, the high-temperature gas source bypass (13) will introduce part of the high-temperature steam into the heat storage process The steam mixer, at this time, the heat storage steam temperature regulating valve is put into automatic operation, and it operates in the PID closed-loop control mode, and the adjustment value is the outlet temperature of the mixer in the heat storage process of the device.

In one embodiment of the present application, when the heat storage and heat supply are running, if the pressure of the steam supply is insufficient, a normal gas source is introduced into the control system. After the normal gas source passes through the steam supply pressure regulator valve CV0 (21), it is mixed with the high-temperature steam after cooling and pressure stabilization in the steam supply pressure stabilization mixer, so as to stabilize the external steam supply parameters of the system. Further, when the steam supply temperature regulating valve CV12 (12) in the heat storage process is closed to the minimum valve position, or the real-time monitoring temperature at the outlet of the device is greater than the target steam supply temperature (that is, the set value of the steam supply temperature that meets the requirements), Close the high-temperature gas source heat release switch valve to stop the heat storage steam supply operation mode, and automatically switch to the normal gas source steam supply.

In an embodiment of the present application, the control mode of the regulating valve during heat storage steam supply operation can be determined according to the steam parameters detected in the above-mentioned multiple real-time detection points. In terms of the control scheme in the above embodiment, in this real-time example, the external steam supply parameters of the system at any time are measured in real time by the external steam supply temperature and pressure measuring point (26) of the system, and the external steam supply temperature is t ₀ , and the external steam supply The steam supply pressure is p ₀ . The high-temperature steam t _H enters the system from the high-temperature gas source inlet (2), and part of it enters the internal heat exchange coil of the adiabatic layered heat storage device (5) through the steam inlet (6) of the heat storage process of the device. The steam outlet (7) in the heat storage process of the device leads to the adiabatic layered heat storage device (5). At this time, the temperature of the medium inside the device heats up and stores heat to realize the heat storage function of the system.

After the high-temperature steam is drawn out from the steam outlet (7) of the heat storage process of the device, the real-time monitoring temperature is t ₁ through the steam outlet temperature measuring point (22) of the heat storage process of the device, and enters the heat storage through the heat storage steam flow regulating valve CV11 (11) Process steam mixer (10). At the same time, the other part of the high-temperature steam introduced into the system does not pass through the adiabatic layered heat storage device (5), but is directly introduced into the heat storage process through the heat storage process steam supply temperature regulating valve CV12 (12) through the heat storage process steam bypass pipe (13) steam mixer (10), and mix with the exothermic and cooled steam.

During the flow-through process above, the flow control valve CV11 (11) is put into automatic operation and operates in a PID closed-loop control mode, and the adjustment value is the pressure value p ₁₀ measured in real time by the steam supply temperature and pressure measuring point (23) during the heat storage process of the device. The steam supply temperature regulating valve CV12 (12) in the heat storage process is put into automatic operation, and operates in the PID closed-loop control mode. The adjustment value is the temperature value t ₁₀ measured in real time by the steam supply temperature and pressure measuring point (23) in the heat storage process of the device. In this embodiment, p ₁₀ =p ₀ and t ₁₀ =t ₀ can be set to ensure that the system can supply steam stably to the outside while running with heat storage.

When the steam supply temperature regulating valve CV12 (12) in the heat storage process has been closed to the minimum valve position, but t ₁₀ >t ₀ still occurs, or the real-time monitoring temperature of the steam outlet temperature measuring point (22) in the heat storage process of the device is t If ₁ >t ₀ , it means that the heat storage medium in the adiabatic layered heat storage device (5) has reached the standard, and the system cannot further store heat. At this time, control the high-temperature gas source heat release switch valve V1 (14) Closed, the system is heated externally by the normal air source.

When the regenerative steam flow regulating valve CV11 (11) has been opened to the maximum, but still exists, p ₁₀ < p ₀ , it indicates that the flow rate of the high-temperature steam source cannot meet the external steam supply requirements. Then introduce normal air source into the system at this time, and mix with the above-mentioned high-temperature air source in the system steam supply and pressure stabilization mixer (20) through the steam supply pressure regulator valve CV0 (21). The steam supply pressure stabilizing regulating valve CV0 (21) is put into automatic operation, adopts PID closed-loop control mode to operate, and the adjustment value is the pressure value p ₀ measured in real time by the external steam supply temperature and pressure measuring point (26) of the system.

Thus, the method realizes the control of heat storage and steam supply operation of the cogeneration heat storage type stable steam supply system, and enables the system to have the functions of steam heat storage and constant temperature and stable pressure steam supply.

Fig. 4 is a flow chart of a heat release steam supply operation control method proposed in the embodiment of the present application. As shown in Figure 4, the method includes the following steps:

Step S401: Open the heat-absorbing on-off valve of the low-temperature air source and close the heat-releasing on-off valve of the high-temperature air source.

Specifically, when the system is running in the heat release and steam supply mode, the low-temperature gas source heat absorption switch valve V2 (19) is controlled to open, and the high-temperature gas source heat release switch valve V1 (14) is closed to transfer the low-temperature steam t _L from the thermoelectric The production unit is introduced into the system.

Step S402: After controlling a part of the low-temperature steam to enter the adiabatic layered heat storage device to absorb heat and raise the temperature, the low-temperature steam passing through the heat release steam flow regulating valve and the other part directly passing through the heat release process steam supply temperature regulating valve is in the heat release process steam mixer mix in.

Specifically, a part of the low-temperature steam introduced enters the adiabatic layered heat storage device (5) to absorb heat and raise the temperature (the heat storage medium of the device absorbs heat) to complete the heat release function of the system. The heat release steam flow regulating valve CV21 (16) and The low-temperature steam that directly passes through the heat release process steam supply temperature regulating valve CV22 (17) is mixed in the heat release process steam mixer (15) to stabilize the pressure and temperature of the external air supply.

Step S403: Based on the PID closed-loop control mode, automatically adjust the outlet pressure of the heat release process steam mixer through the heat release steam flow regulating valve, and automatically adjust the outlet temperature of the heat release process steam mixer through the heat release process steam supply temperature regulating valve.

Specifically, when the system is running in the heat release steam supply mode, the heat release steam flow regulating valve CV21 (16) automatically adjusts the stable steam supply pressure, and the heat release process steam supply temperature regulating valve CV22 (17) automatically adjusts the stable steam supply temperature to realize Stable steam supply function during the heat release process of the system. That is, the steam absorbed by the adiabatic layered heat storage device (5) passes through the heat release steam flow regulating valve CV21 (16) to stabilize the steam supply pressure, and then enters the heat release process steam mixer (15). Furthermore, this part of the low-temperature steam after absorbing heat and stabilizing its pressure is mixed with the low-temperature steam directly flowing through the steam supply temperature regulating valve CV22 (17) in the heat release process in the mixer to stabilize the external supply steam temperature. After that, it passes through the low-temperature air source heat absorption switch valve V2 (19) and then enters the system steam supply pressure stabilizing mixer (20).

During specific implementation, when the system is in the heat release and steam supply operation mode, the low-temperature gas source heat absorption switch valve is in an open state, and low-temperature steam is introduced into the system. At this time, the heat release steam flow regulating valve CV21 (16) is put into automatic operation, and it operates in a PID closed-loop control mode, and the adjustment value is the outlet pressure of the mixer in the heat release process of the device. Further, the low-temperature steam absorbs heat and heats up through the adiabatic layered heat storage device (5). If the steam outlet temperature in the heat release process of the device is greater than or equal to the set value of the steam supply temperature, the low-temperature gas source bypass (18) will introduce part of the low-temperature steam into the steam mixer in the heat release process. At this time, the heat release steam temperature regulating valve CV22 (17) Put into automatic operation, adopt PID closed-loop control mode to operate, and the adjustment value is the outlet temperature of the mixer in the heat release process of the device.

In one embodiment of the present application, if the supply steam pressure is insufficient during heat release and heat supply operation, a normal air source is introduced into the control system. After the normal gas source passes through the steam supply pressure regulator valve CV0 (21), it is mixed with the temperature-raised and stabilized low-temperature steam in the steam supply pressure mixer to stabilize the external steam supply parameters of the system. Further, when the system is in the heat release steam supply operation mode, the steam supply temperature regulating valve CV22 (17) is opened to the maximum valve position during the heat release process, or the real-time monitoring temperature at the outlet of the device is lower than the target steam supply temperature, the control Close the low-temperature gas source heat absorption switch valve V2 (19) to stop the heat release steam supply operation mode, and automatically switch to the normal gas source steam supply.

In an embodiment of the present application, the control mode of the regulating valve in the heat release steam supply operation can be determined according to the steam parameters detected in the above-mentioned multiple real-time detection points. According to the control scheme in the above embodiment, the low-temperature steam t _L enters the system from the low-temperature gas source inlet (3), and a part of it enters the internal exchange of the adiabatic layered heat storage device (5) through the device heat release process steam inlet (8). After the heat coil pipe absorbs heat and heats up, the steam outlet (9) in the heat release process of the device leads to the adiabatic layered heat storage device (5). At this time, the medium inside the device cools down and releases heat to realize the heat release function of the system.

After the low-temperature steam is drawn out from the steam outlet (9) in the heat release process of the device, the real-time monitoring temperature is _t2 at the steam outlet temperature measuring point (24) in the heat release process of the device, and enters the heat release steam through the heat release steam flow regulating valve CV21 (16). Process steam mixer (15). At the same time, another part of the low-temperature steam introduced into the system does not pass through the adiabatic layered heat storage device (5), but directly introduces the heat release process through the heat release process steam supply temperature regulating valve CV22 (17) through the heat release process steam bypass pipe (18) Steam mixer (15), and mixes with the steam that heats up through heat absorption.

During the above flow process, the heat release steam flow regulating valve CV21 (16) is put into automatic operation, and operates in a PID closed-loop control mode, and the adjustment value is the pressure value p ₂₀ measured in real time by the steam supply temperature and pressure measuring point (25) during the heat release process of the device . The steam supply temperature regulating valve CV22 (17) in the heat release process is put into automatic operation, and operates in the PID closed-loop control mode. The adjustment value is the temperature value t ₂₀ measured in real time by the steam supply temperature and pressure measuring point (25) in the heat release process of the device. In this embodiment, p ₂₀ =p ₀ and t ₂₀ =t ₀ can be set to ensure that the system can supply steam stably to the outside while running with heat release.

When the steam supply temperature regulating valve CV22 (17) in the heat release process has been opened to the maximum valve position, but t ₂₀ < t ₀ still occurs, or the real-time monitoring temperature of the steam outlet temperature measuring point (24) in the heat release process of the device is t ₂ < t ₀ , it indicates that the heat release capacity of the heat storage medium in the adiabatic layered heat storage device (5) has reached the maximum, and the system cannot further release heat. At this time, control the low-temperature air source heat absorption switch valve V2 (19 ) is closed, and the system is heated externally by the normal air source.

When the heat release steam flow regulating valve CV21 (16) has been opened to the maximum, but still exists, p ₂₀ < p ₀ , it indicates that the flow rate of the low-temperature steam source cannot meet the external steam supply requirements. Then introduce normal air source into the system at this time, and mix with the above-mentioned low-temperature air source in the system steam supply and pressure stabilization mixer (20) through the steam supply pressure regulator valve CV0 (21). The steam supply pressure stabilizing regulating valve CV0 (21) is put into automatic operation, adopts PID closed-loop control mode to operate, and the adjustment value is the pressure value p ₀ measured in real time by the external steam supply temperature and pressure measuring point (26) of the system.

Thus, the method realizes the control of the heat release and steam supply operation of the cogeneration heat storage type stable steam supply system, so that the system has the functions of steam heat release and constant temperature and stable pressure steam supply.

Based on the above two control methods, this application uses the optimal control method of the regulating valve to enable the system to have the functions of steam heat storage/heat release and constant temperature and stable pressure steam supply at the same time, so that the cogeneration unit can be operated without affecting the quality of steam supply. Realize heat storage and peak shaving operation. In the above embodiment, the normal gas source temperature t _M =t ₀ , the high temperature gas source temperature t _H >t ₀ , and the low temperature gas source temperature t _L <t ₀ .

It should be noted that, in the control method of the embodiment of the present application, when it is necessary to adjust the external steam supply parameters of the system, it is only necessary to adjust the heat storage steam flow control valve CV11 (11) and the heat release steam flow control valve CV21 (16). The automatic target value is the new external steam supply pressure parameter; adjust the automatic target value of the steam supply temperature regulating valve CV12 (12) in the heat storage process and the steam supply temperature regulating valve CV22 (17) in the heat release process to the new external steam supply temperature parameter; Adjusting the automatic target value of the steam supply pressure regulator valve CV0(21) to the new external steam supply pressure parameters can make the cogeneration heat storage stable steam supply system operate independently to achieve a new stable operating state.

To sum up, the control method of the cogeneration heat storage type stable steam supply system implemented in this application, through the optimization control method of the regulating valve, enables the system to simultaneously have the functions of steam heat storage/heat release and constant temperature and stable pressure steam supply. Finally, the cogeneration unit can realize heat storage and peak-shaving operation without affecting the quality of steam supply. In the stage of heat storage and heat release, the functions of steam heat storage and stable steam supply are realized only by adjusting the steam flow of three different parameter levels drawn from the thermal system of the original unit, with little impact on the thermal system of the original unit. When the operating conditions of the system change, the thermal system of the original unit can be adjusted independently to re-establish the thermal balance without human intervention, which greatly reduces the complexity of the system operation. The control logic is clear and simple, the hardware cost is low, and it is easy to implement in practical applications. Moreover, all operation control functions in this application are completed by regulating valves, which have continuous adjustability, especially when the system switches between normal steam supply, heat storage steam supply, heat release steam supply, etc., no operating parameters will be generated. The sudden change of the system ensures the feasibility of the non-disturbance switching of the system, and minimizes the impact of the system's changing working conditions on the original system. Since the system has the function of undisturbed switching of operating conditions, the system can also realize the function of starting or stopping at any time in any operating mode, and can still maintain the stable operation of external steam supply during the switching process, which greatly enhances the System operation flexibility. The function of the system to supply steam with external stable parameters is the result of the joint action of multiple regulating valves. When modifying and adjusting each regulating valve to follow the set value, the external steam supply parameters of the system can be changed to improve the flexibility of system operation and ensure Stability and reliability of external heat supply.

In order to realize the above-mentioned embodiments, the present application also proposes a non-transitory computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it realizes the cogeneration heat storage type stable supply as proposed in the foregoing embodiments of the present application. Control method of steam system.

It should be noted that it should be understood that each part of the present application may be implemented by hardware, software, firmware or a combination thereof. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, Programmable Gate Arrays (PGAs), Field Programmable Gate Arrays (FPGAs), etc.

In addition, in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientation Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation , and therefore cannot be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. The utility model provides a steam supply system is stabilized to combined heat and power generation heat-retaining type which characterized in that includes: normal air supply entry, high temperature air supply entry, low temperature air supply entry, adiabatic layering heat-retaining device, heat accumulation process steam mixer, heat accumulation steam flow control valve, heat accumulation process supply vapour temperature control valve, high temperature air supply exothermic ooff valve, heat release process steam mixer, heat release steam flow control valve, heat release process supply vapour temperature control valve, low temperature air supply endothermic ooff valve, system supply vapour steady voltage blender and supply vapour steady voltage governing valve, adiabatic layering heat-retaining device includes: a plant heat storage process steam inlet, a plant heat storage process steam outlet, a plant heat release process steam inlet, and a plant heat release process steam outlet, wherein,

the high-temperature gas source inlet is connected with a heat storage process steam inlet of the device, and is also connected with the first end of the heat storage process steam supply temperature regulating valve through a heat storage process steam bypass pipeline;

the device heat accumulation process steam outlet is connected with the first end of the heat accumulation steam flow regulating valve, the second end of the heat accumulation steam flow regulating valve is connected with the first end of the heat accumulation process steam mixer, the second end of the heat accumulation process steam supply temperature regulating valve is connected with the second end of the heat accumulation process steam mixer, and the third end of the heat accumulation process steam mixer is connected with the first end of the high-temperature air source heat release switch valve;

the low-temperature gas source inlet is connected with the steam inlet in the heat release process of the device, and is also connected with the first end of the steam supply temperature regulating valve in the heat release process through a steam bypass pipeline in the heat release process;

the device heat release process steam outlet is connected with the first end of the heat release steam flow regulating valve, the second end of the heat release steam flow regulating valve is connected with the first end of the heat release process steam mixer, the second end of the heat release process steam supply temperature regulating valve is connected with the second end of the heat release process steam mixer, and the third end of the heat release process steam mixer is connected with the first end of the low-temperature gas source heat absorption switch valve;

the second end of the high-temperature gas source heat release switch valve and the second end of the low-temperature gas source heat absorption switch valve are connected with the first end of the system steam supply and pressure stabilization mixer, the normal gas source inlet is connected with the first end of the steam supply and pressure stabilization regulating valve, the second end of the steam supply and pressure stabilization regulating valve is connected with the second end of the system steam supply and pressure stabilization mixer, and the third end of the system steam supply and pressure stabilization mixer is connected with an external steam supply main pipe of the system.

2. A combined heat and power generation thermal storage type stable steam supply system according to claim 1, wherein,

a device heat storage process steam outlet temperature measuring point is arranged between the device heat storage process steam outlet and the first end of the heat storage steam flow regulating valve;

a steam supply temperature pressure measuring point in the heat storage process is arranged between the third end of the heat storage process steam mixer and the first end of the high-temperature gas source heat release switch valve;

a device heat release process steam outlet temperature measuring point is arranged between the device heat release process steam outlet and the first end of the heat release steam flow regulating valve;

a device heat release process steam supply temperature pressure measuring point is arranged between the third end of the heat release process steam mixer and the first end of the low-temperature gas source heat absorption switch valve;

and the external steam supply main pipe is provided with a system external steam supply temperature and pressure measuring point.

3. The cogeneration heat-storage type stable steam supply system according to claim 1, wherein the normal air source inlet, the high temperature air source inlet and the low temperature air source inlet are used for correspondingly transmitting a normal air source, a high temperature air source and a low temperature air source introduced from a thermodynamic system of a cogeneration unit into the cogeneration heat-storage type stable steam supply system; the parameter of the normal air source is a target parameter of external air supply of the cogeneration heat storage type stable air supply system, the parameter of the high-temperature air source is higher than the target parameter, and the parameter of the low-temperature air source is lower than the target parameter.

4. A control method of a cogeneration heat-storage type stable steam supply system, wherein the cogeneration heat-storage type stable steam supply system is the cogeneration heat-storage type stable steam supply system according to any one of claims 1 to 3, the control method comprising the steps of:

judging the current operation state of the cogeneration unit;

when the cogeneration unit is in a normal running state, closing the high-temperature gas source heat release switch valve and the low-temperature gas source heat absorption switch valve, and regulating the introduced normal gas source through the gas supply and pressure stabilization regulating valve;

when the cogeneration unit is in a peak shaving state, determining a gas supply operation mode of the cogeneration heat storage type stable gas supply system by taking the stability of external gas supply parameters of the system as a target;

and controlling the cogeneration heat storage type stable steam supply system to execute a heat storage steam supply operation mode or a heat release steam supply operation mode according to the judgment result.

5. The control method according to claim 4, wherein the controlling the cogeneration heat-storage type stable steam supply system to execute a heat storage and steam supply operation mode includes:

opening the high-temperature gas source heat release switch valve and closing the low-temperature gas source heat absorption switch valve;

after controlling a part of high-temperature steam to enter the heat insulation layered heat storage device for heat release and temperature reduction, mixing the high-temperature steam which passes through the heat storage steam flow regulating valve and the other part of high-temperature steam which directly passes through the heat storage process steam supply temperature regulating valve in a heat storage process steam mixer;

based on a PID closed-loop control mode, the outlet pressure of the heat storage process steam mixer is automatically adjusted through the heat storage steam flow adjusting valve, and the outlet temperature of the heat storage process steam mixer is automatically adjusted through the heat storage process steam supply temperature adjusting valve.

6. The control method according to claim 4, wherein the controlling the cogeneration heat-storage type stable steam supply system to execute a heat release steam supply operation mode comprises:

opening the low-temperature gas source heat absorption switch valve and closing the high-temperature gas source heat release switch valve;

after controlling a part of low-temperature steam to enter the heat insulation layered heat storage device for heat absorption and temperature rise, the low-temperature steam which passes through the heat release steam flow regulating valve and the other part of low-temperature steam which directly passes through the heat release process steam supply temperature regulating valve are mixed in a heat release process steam mixer;

based on a PID closed-loop control mode, the outlet pressure of the heat release process steam mixer is automatically adjusted through the heat release steam flow adjusting valve, and the outlet temperature of the heat release process steam mixer is automatically adjusted through the heat release process steam supply temperature adjusting valve.

7. The control method according to claim 5, characterized by further comprising:

and closing the heat storage process steam supply temperature regulating valve to the minimum valve position, or closing the high-temperature air source heat release switch valve to stop the heat storage steam supply operation mode under the condition that the real-time monitoring temperature of the device outlet is greater than the target steam supply temperature, and automatically switching to the normal air source steam supply mode.

8. The control method according to claim 6, characterized by further comprising:

and when the steam supply temperature regulating valve is opened to the maximum valve position in the heat release process, or the condition that the real-time monitoring temperature of the device outlet is lower than the target steam supply temperature occurs, closing the low-temperature air source heat absorption switch valve to stop the heat release steam supply operation mode, and automatically switching to the normal air source steam supply mode.

9. The control method according to claim 4, characterized by further comprising:

in the process of executing the heat storage steam supply operation mode or the heat release steam supply operation mode, if the output high-temperature steam flow or low-temperature steam flow cannot meet the requirement of external steam supply pressure, introducing a normal air source, and controlling the normal air source to be mixed with the steam subjected to heat release or heat absorption in a system steam supply pressure stabilizing mixer after passing through a steam supply pressure stabilizing regulating valve so as to maintain stable steam supply pressure.

10. A non-transitory computer-readable storage medium, having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the method of controlling a combined heat and power thermal storage type stable steam supply system according to any one of claims 4 to 9.

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