CN109611827B - A temperature self-regulating flameless combustion device - Google Patents

Abstract

The invention discloses a temperature self-regulating flameless combustion device, which comprises a shell, a heat-insulating layer and a furnace pipe, wherein the furnace pipe is sequentially divided into a first reaction zone and a second reaction zone from outside to inside, a plurality of flameless combustion pipes are uniformly distributed at intervals at the edge of the first reaction zone, a first medium is filled in the first reaction zone, the center of the first reaction zone is provided with the second reaction zone, the second reaction zone comprises a heat-conducting pipe, a second medium is filled in the heat-conducting pipe, and the center of the heat-conducting pipe is also provided with a natural gas heating pipeline; a first temperature acquisition unit and a second temperature acquisition unit are respectively arranged in the first reaction zone and the second reaction zone. The invention can control the flow control valve of the fuel mixing area, the amount of flameless combustion and the heat conduction amount of double medium heat radiation, thereby avoiding the influence of instantaneous high temperature on reactants and simultaneously finely adjusting the temperature.

Description

A temperature self-regulating flameless combustion device

technical field

The invention relates to the field of flameless combustion devices, in particular to a temperature self-adjusting flameless combustion device.

Background technique

Flameless combustion technology is a new type of low-polluting combustion technology. There is no obvious flame surface during combustion, a large amount of heat is generated by combustion, and no polluting gas is generated and released after combustion. Especially in the existing flameless combustion of methanol, a large amount of heat should be generated when methanol is in contact with the catalyst, and the whole process is simple and fast, which provides a new direction for the development of industrialization.

Existing flameless combustion cannot control the temperature of flameless combustion due to rapid reaction and rapid heat release, especially when heating natural gas or petroleum compounds, flameless combustion undoubtedly provides a safer way, but due to the temperature Rapidly increased reaction temperature with no free control over heating.

SUMMARY OF THE INVENTION

The object of the present invention is to overcome the deficiencies of the prior art, and to provide a flameless combustion device with self-regulation of temperature, which solves the problem that traditional flameless combustion generates a large amount of heat and cannot control the temperature in the reaction process. The flow control valve in the zone and the amount of flameless combustion are controlled, as well as the double medium heat radiation conduction heat, so as to avoid the influence of the instantaneous high temperature on the reactants, and at the same time, the temperature can be finely adjusted.

The purpose of this invention is to realize through the following technical solutions:

A temperature self-regulating flameless combustion device, comprising:

The furnace body is a horizontal furnace body structure. One side of the furnace body is provided with a fuel mixing area, and the side of the fuel mixing area is provided with a fuel input pipe and an air input pipe. The two flameless combustion pipes are connected, and the fuel input pipe and the air input pipe are respectively provided with flow control valves; the furnace body includes an outer shell, a thermal insulation layer and a furnace liner. The furnace liner is divided into a first reaction zone and a second reaction zone from outside to inside. The reaction zone, the edge of the first reaction zone is evenly spaced with a plurality of flameless combustion tubes, the first reaction zone is filled with the first medium, the center of the first reaction zone is provided with a second reaction zone, and the second reaction zone includes a thermal conductivity. The heat transfer pipe is filled with a second medium, and the center of the heat transfer pipe is also provided with a natural gas heating pipe; the first reaction zone and the second reaction zone are respectively provided with a first temperature acquisition unit and a second temperature acquisition unit, and outside the furnace is also provided There is a temperature control unit, and the temperature control unit is respectively connected with the first temperature acquisition unit, the second temperature acquisition unit and the flow control valve.

It should be noted that the first reaction zone and the second reaction zone are used, and the two reaction zones are used for radiation conduction heat to avoid the impact of instantaneous high temperature on the natural gas heating pipeline. When the flameless combustion tube starts to work, the first medium will be affected first. , and make the temperature of the first medium rise rapidly. At this time, the first temperature acquisition unit feeds back the acquired temperature to the temperature control unit in real time. When the temperature of the first medium reaches the first preset reaction temperature threshold, the flow rate is adjusted. The control valve reduces the fuel entering the flameless combustion tube, thereby reducing the reaction intensity of the flameless combustion, thereby achieving the effect of controlling the temperature. After the temperature of the first medium increases, heat will be conducted to the second medium, so that the natural gas heating pipeline in the second medium is heated.

The dual-medium heat conduction of the present application is based on the rapid release of a large amount of heat by a flameless reaction, which not only avoids the influence of the instantaneous high temperature on the reactants, but also dilutes the instantaneous high-temperature heat through the dual medium, so that the natural gas heating pipeline is slowly heated.

It should be further noted that the flameless combustion described in this application includes the process in which methanol, ethanol, pulverized coal or coal gas is uniformly mixed with air in a closed tube, flameless combustion occurs through a catalyst and a large amount of radiant heat is released.

Preferably, the temperature control unit includes a central controller, the central controller controls the reaction intensity in the flameless combustion tube by adjusting the flow control valve, and thus adjusts the temperature of the second medium in the second reaction zone, so that the second medium The temperature is within the preset temperature range.

Preferably, the furnace body is also provided with a pressure monitoring device, which can acquire the pressure in the furnace in real time, thereby improving safety and reliability.

Preferably, an alarm device is further provided outside the furnace, and the alarm device is used for alarming abnormal temperature.

Preferably, the outer wall of the flameless combustion tube is provided with a cross-shaped heat-conducting sheet, which increases the conduction area and can quickly conduct heat.

Preferably, the first temperature collection unit and the second temperature collection unit are respectively constituted by multi-point temperature collection devices.

Preferably, the furnace body is composed of an outer shell, an insulating layer and a furnace liner, the furnace liner is filled with a first medium, and the outer edge of the furnace liner is arranged with a first flameless combustion tube group with an annular cross-section, and the radial center of the furnace liner A second flameless combustion tube group arranged in a circle is also provided, a natural gas heating pipeline is arranged between the first flameless combustion tube group and the second flameless combustion tube group, and a plurality of temperature sensors are arranged on one side of the natural gas heating pipeline .

Preferably, the first flameless combustion tube group and the second flameless combustion tube group are respectively connected to the fuel mixing area provided on the outer casing through a flow control device.

Preferably, an exhaust device connected to the ends of the first flameless combustion tube group and the second flameless combustion tube group is also provided on the casing.

Preferably, an exhaust gas monitoring device is provided on the exhaust device.

The beneficial effects of the present invention are:

(1) A first reaction zone and a second reaction zone are provided, and a plurality of flameless combustion tubes are arranged at the edge of the first reaction zone, which not only avoids the instantaneous generation of a large amount of heat in the flameless reaction to affect the reactants, but also can pass multiple flameless combustion tubes. The medium radiates and conducts heat, so that the natural gas heating pipeline is slowly heated;

(2) The temperature information of the first reaction zone and the second reaction zone can be obtained in real time, and the fuel of the flameless reaction can be regulated according to the real-time temperature information, so as to realize the temperature control of the flameless reaction;

(3) A multi-point temperature acquisition device is provided, which can acquire the temperature information of multiple positions in the furnace in real time, which is beneficial to acquire the temperature radiation range and the temperature conduction speed, so as to realize the fine control of the temperature;

(4) It is equipped with an alarm device and a pressure monitoring device, which is beneficial to improve the safety of the flameless reaction.

Description of drawings

Fig. 1 is the furnace body structure schematic diagram of the present invention;

Fig. 2 is the cross-sectional structure schematic diagram of the furnace gallbladder of the present invention;

3 is a schematic structural diagram of Embodiment 3 of the present invention;

4 is a schematic cross-sectional structure diagram of Embodiment 5 of the present invention;

In the figure, 101-shell, 102-insulation layer, 103-furnace, 104-fuel mixing area, 105-fuel input pipe, 106-air input pipe, 107-flow control valve, 108-exhaust device, 109-section A medium, 110-flameless combustion tube, 111-second medium, 112-natural gas heating pipeline, 113-second temperature acquisition unit, 114-first temperature acquisition unit, 115-temperature sensor, 116-second flameless combustion Tube group, 117-first flameless combustion tube group, 118-heat-conducting pipe, 119-cross-shaped heat-conducting sheet.

Detailed ways

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

Example 1:

A temperature self-regulating flameless combustion device, please refer to Figure 1 and Figure 2, including:

The furnace body is a horizontal furnace body structure. One side of the furnace body is provided with a fuel mixing area 104, and the side of the fuel mixing area 104 is provided with a fuel input pipe 105 and an air input pipe 106. The other side of the fuel mixing area 104 is connected to the device. A plurality of flameless combustion pipes 110 are connected in the furnace body, and the fuel input pipe 105 and the air input pipe 106 are respectively provided with flow control valves 107; From outside to inside, it is divided into a first reaction zone and a second reaction zone. A plurality of flameless combustion tubes 110 are evenly spaced at the edge of the first reaction zone. The first reaction zone is filled with a first medium 109. A second reaction zone is arranged in the center of the zone, the second reaction zone includes a heat pipe 118, the heat pipe 118 is filled with a second medium 111, and a natural gas heating pipe 112 is also set in the center of the heat pipe 118; the first reaction zone and the second reaction zone The first temperature collection unit 114 and the second temperature collection unit 113 are respectively arranged in the area, and a temperature control unit is also arranged outside the furnace. The temperature control unit is respectively connected with the first temperature collection unit 114, the second temperature collection unit 113 and the flow control valve. 107 connected.

Further, an exhaust device 108 is also provided on the furnace body, and the exhaust device 108 is connected to the rear end of the flameless combustion pipe 110 .

It should be noted that the first reaction zone and the second reaction zone are used, and the two reaction zones are used for radiation conduction heat, so as to avoid the impact of the instantaneous high temperature on the natural gas heating pipeline. When the flameless combustion tube 110 starts to work, it will first affect the first medium 109, and the temperature of the first medium 109 rises rapidly. At this time, the first temperature acquisition unit 114 feeds back the acquired temperature to the temperature control unit in real time. When the temperature of the first medium 109 reaches the first preset reaction temperature valve value, then adjust the flow control valve to reduce the fuel entering the flameless combustion tube, thereby reducing the reaction intensity of flameless combustion, so as to achieve the effect of controlling the temperature. After the temperature of the first medium 109 increases, heat will be conducted to the second medium 111 again, so that the natural gas heating pipeline 112 in the second medium 111 is heated.

The dual-medium heat conduction in this embodiment is based on the fact that the flameless reaction of methanol rapidly releases a large amount of heat, which not only avoids the influence of the instantaneous high temperature on the reactants, but also dilutes the instantaneous high-temperature heat through the dual media, so that the natural gas heating pipeline is slowly heated. heating.

Example 2:

In this embodiment, on the basis of Embodiment 1, the furnace body is further provided with a pressure monitoring device, and the pressure monitoring device can obtain the pressure information in the furnace in real time, so as to avoid abnormal reaction and enhance the safety of the reaction.

Example 3:

In this embodiment, on the basis of Embodiment 1, please refer to FIG. 3 , the outer wall of the flameless combustion tube 110 is provided with a cross-shaped heat-conducting sheet 119 , and the cross-shaped heat-conducting sheet 119 increases the conduction area. During the working process, it releases a large amount of heat instantly, and the heat can be radiated and transferred to the surroundings through the heat-conducting sheet, which enhances the heat transfer effect.

Example 4:

In this embodiment, on the basis of Embodiment 1, please refer to FIG. 2 , the first temperature collection unit 114 and the second temperature collection unit 113 are respectively composed of multi-point temperature collection devices. Since the heat transfer generated by the flameless reaction is radiative transfer from the proximal end to the distal end, the temperature of different positions is different, at this time, it is necessary to grasp the real-time temperature of different positions and the temperature change of different positions, so as to grasp the rate of temperature transfer. Temperature control is achieved by adjusting the flow control valve to control the amount of flameless reaction.

Example 5:

A temperature self-regulating flameless combustion device, please refer to Figure 4, including:

The furnace body is a horizontal furnace body structure. One side of the furnace body is provided with a fuel mixing area 104, and the side of the fuel mixing area 104 is provided with a fuel input pipe 105 and an air input pipe 106. The other side of the fuel mixing area 104 is connected to the device. A plurality of flameless combustion pipes 110 are connected in the furnace body, and the fuel input pipe 105 and the air input pipe 106 are respectively provided with flow control valves 107; The inside is filled with the first medium 109, the outer edge of the furnace 103 is arranged with a first flameless combustion tube group 117 with an annular cross-section, and the radial center of the furnace 103 is also provided with a second flameless combustion arranged in a circle. Pipe group 116, a natural gas heating pipe 112 is arranged between the first flameless combustion pipe group 117 and the second flameless combustion pipe group 116, a plurality of temperature sensors 115 are arranged on one side of the natural gas heating pipe 112, and the outer casing is also provided with The ends of the first flameless combustion tube group 117 and the second flameless combustion tube group 116 are connected to an exhaust device 108 , and an exhaust gas monitoring device is provided on the exhaust device 108 .

In this embodiment, the interlayer heat conduction method is adopted, and a flameless combustion tube group is respectively arranged in the center of the furnace 103 and the edge of the furnace 103, so that the heat of the flameless combustion tube group is transferred to the first medium 109, and passes through the first medium 109. The natural gas heating line 112 is heated. The method of this embodiment is not only safe and convenient, but also does not discharge polluting gas, can control the reaction temperature, and enhance the thermal reaction effect.

It should be further explained that the present application solves the problem that the traditional methanol flameless combustion produces a large amount of heat, and the temperature in the reaction process cannot be controlled. The dual medium heat radiation conducts heat to avoid the influence of instantaneous high temperature on the reactants, and at the same time, it can finely adjust the temperature.

The above-mentioned embodiments only represent specific embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention.

Claims (9)

1. a flameless combustion device of temperature self-regulation, is characterized in that, comprises: The furnace body is a horizontal furnace body structure. One side of the furnace body is provided with a fuel mixing area, and the side of the fuel mixing area is provided with a fuel input pipe and an air input pipe. The two flameless combustion pipes are connected, and the fuel input pipe and the air input pipe are respectively provided with flow control valves; the furnace body includes an outer shell, a thermal insulation layer and a furnace liner. The furnace liner is divided into a first reaction zone and a second reaction zone from outside to inside. The reaction zone, the edge of the first reaction zone is evenly spaced with a plurality of flameless combustion tubes, the first reaction zone is filled with the first medium, the center of the first reaction zone is provided with a second reaction zone, and the second reaction zone includes a thermal conductivity. The heat transfer pipe is filled with a second medium, and the center of the heat transfer pipe is also provided with a natural gas heating pipe; the first reaction zone and the second reaction zone are respectively provided with a first temperature acquisition unit and a second temperature acquisition unit, and outside the furnace is also provided There is a temperature control unit, which is respectively connected with the first temperature acquisition unit, the second temperature acquisition unit and the flow control valve; the temperature control unit includes a central controller, which controls the flameless combustion by adjusting the flow control valve The reaction intensity in the tube is adjusted, and the temperature of the second medium in the second reaction zone is adjusted accordingly, so that the temperature of the second medium is within a preset temperature range. 2 . The flameless combustion device with self-regulation of temperature according to claim 1 , wherein a pressure monitoring device is further provided on the furnace body. 3 . 3 . The flameless combustion device with self-regulation of temperature according to claim 1 , wherein an alarm device is further provided outside the furnace body, and the alarm device is used for alarming abnormal temperature. 4 . 4 . The flameless combustion device with self-regulation of temperature according to claim 1 , wherein the outer wall of the flameless combustion tube is provided with a cross-shaped heat-conducting sheet. 5 . 5 . The temperature self-adjusting flameless combustion device according to claim 1 , wherein the first temperature acquisition unit and the second temperature acquisition unit are respectively composed of multi-point temperature acquisition devices. 6 . 6. The flameless combustion device with self-regulation of temperature according to claim 1, characterized in that the furnace body is composed of a shell, a thermal insulation layer and a furnace liner, the furnace liner is filled with the first medium, and the outer edge of the furnace liner is arranged with The first flameless combustion tube group with an annular cross section, the radial center of the furnace is also provided with a circular second flameless combustion tube group, the first flameless combustion tube group and the second flameless combustion tube Natural gas heating pipes are arranged between the groups, and a plurality of temperature sensors are arranged on one side of the natural gas heating pipes. 7. The flameless combustion device of a temperature self-regulation according to claim 6, wherein the first flameless combustion tube group and the second flameless combustion tube group pass through the flow control device and the fuel provided on the casing respectively. Mixed zones are connected. 8. The flameless combustion device of temperature self-regulation according to claim 6, wherein the casing is also provided with an exhaust gas connected to the ends of the first flameless combustion tube group and the second flameless combustion tube group device. 9. The flameless combustion device with self-regulation of temperature according to claim 6 or 8, characterized in that, an exhaust gas monitoring device is provided on the exhaust device.

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