CN206129339U - Organic rankine cycle device - Google Patents

Abstract

The utility model discloses an organic rankine cycle device still includes the bypass pipeline, the bypass pipeline with the surge tank is parallelly connected, the one end of bypass pipeline with first pipeline intercommunication, its other end with second pipeline intercommunication, be provided with a stop valve on the first pipeline, be provided with the 2nd stop valve on the bypass pipeline. Get into the steady load stage when the system so, the steam of evaporimeter export for according with the requirement of turbine intake condition, system flow and pressure tended towards stability this moment, it is undulant less, when the effect of surge tank is no longer obvious, a stop valve closes, open the 2nd stop valve, make not rethread surge tank of working medium, but directly pass through from the bypass pipeline, the surge tank will be walked around to the steam that the evaporimeter flows, the bypass pipeline of directly flowing through gets into in the turbine, the reheating to working medium in the surge tank has been avoided, the heat dissipation of surge tank has been reduced, thereby the heat loss of avoiding.

Description

An Organic Rankine Cycle Device

technical field

The utility model relates to the technical field of organic Rankine cycle, in particular to an organic Rankine cycle device.

Background technique

The existing low-temperature organic Rankine cycle power generation device includes a heating device, an evaporator, a surge tank, a turbine, a condenser, a liquid storage tank and a working medium pump connected in sequence, wherein the working medium pump boosts the pressure of the working medium and delivers To the heating of the evaporator, in the start-up stage, the flow rate of the working medium is small, and the working medium pump is generally equipped with a frequency conversion device. The flow rate of the working fluid gradually increases, and the heating of the evaporator is not necessarily uniform. As a result, the working fluid may still be a gas-liquid two-phase flow after passing through the evaporator. It cannot directly enter the steam turbine, but first enters the surge tank. The function of the surge tank is : (1) Buffer the flow and pressure fluctuations of the working medium to ensure that the turbine enters the steam evenly; (2) Separation of vapor and liquid, ensure that the liquid working medium flowing out of the evaporator is recovered after decompression and temperature reduction through the liquid guide pipe during the start-up phase to the condenser. And when the system enters the stable load stage, the outlet of the evaporator is steam that meets the requirements of the turbine inlet parameters. At this time, the flow and pressure of the system have become stable, and the fluctuation is small. The surface area is large, even if there is an insulation layer, there is still heat dissipation loss, and because of its intermediate volume, the surge tank is always filled with working fluid with a certain pressure and temperature and cannot be used, resulting in low heat source utilization.

Therefore, how to provide an organic Rankine cycle device to avoid heat loss is a technical problem to be solved urgently by those skilled in the art.

Utility model content

In view of this, the purpose of this utility model is to provide a machine Rankine cycle device to avoid heat loss.

In order to achieve the above object, the utility model provides the following technical solutions:

An organic Rankine cycle device, comprising a heating device, an evaporator, a surge tank, a turbine, a condenser, a liquid storage tank and a working medium pump, wherein the heating device is used to provide heat for the evaporator, and the The evaporator communicates with the surge tank through a first pipeline, the surge tank communicates with the turbine through a second pipeline, and the turbine communicates with the condenser through a third pipeline, so The condenser communicates with the liquid storage tank through a fourth pipeline, the liquid storage tank communicates with the evaporator through a fifth pipeline, the working medium pump is arranged on the fifth pipeline, and includes a bypass A pipeline, the bypass pipeline is connected in parallel with the surge tank, one end of the bypass pipeline communicates with the first pipeline, and the other end communicates with the second pipeline, and on the first pipeline A first shut-off valve is set, and a second shut-off valve is set on the bypass pipeline.

Preferably, the above-mentioned second cut-off valve is an electric valve.

Preferably, the above-mentioned condenser is provided with a cooling tower, and the cooling medium of the cooling tower is water.

Preferably, the above-mentioned working medium pump is a pneumatic pump.

The organic Rankine cycle device provided by the utility model includes a heating device, an evaporator, a surge tank, a turbine, a condenser, a liquid storage tank and a working medium pump, wherein the heating device is used to provide the evaporator with heat, the evaporator communicates with the surge tank through the first pipeline, the surge tank communicates with the turbine through the second pipeline, and the turbine communicates with the condenser through the third pipeline The condenser communicates with the liquid storage tank through the fourth pipeline, the liquid storage tank communicates with the evaporator through the fifth pipeline, and the working medium pump is arranged on the fifth pipeline, It also includes a bypass pipeline, the bypass pipeline is connected in parallel with the surge tank, one end of the bypass pipeline communicates with the first pipeline, and the other end communicates with the second pipeline, and the first A first shut-off valve is set on a pipeline, and a second shut-off valve is set on the bypass pipeline.

Then when the system enters the stable load stage, the outlet of the evaporator is steam that meets the requirements of the turbine inlet parameters. At this time, the flow and pressure of the system have tended to be stable, the fluctuation is small, and the function of the surge tank is no longer obvious, close the first cut-off valve, open the second cut-off valve, so that the working fluid no longer passes through the surge tank, but directly through the bypass pipe, and the steam flowing out of the evaporator will bypass the surge tank and directly flow into the turbine through the bypass pipe. The reheating of the working medium in the surge tank is avoided, and the heat dissipation loss of the surge tank is reduced, thereby avoiding heat loss.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present utility model. Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is a schematic structural diagram of an organic Rankine cycle device provided by an embodiment of the present invention.

In Figure 1 above:

Heating device 1, evaporator 2, first shut-off valve 3, bypass pipeline 4, surge tank 5, second shut-off valve 6, turbine 7, condenser 8, cooling tower 9, liquid storage tank 10, working medium pump 11.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to FIG. 1 , which is a schematic structural diagram of an organic Rankine cycle device provided by an embodiment of the present invention.

The organic Rankine cycle device provided by the embodiment of the utility model includes a heating device 1, an evaporator 2, a surge tank 5, a turbine 7, a condenser 8, a liquid storage tank 10 and a working medium pump 11, wherein the heating device 1 Used to provide heat for the evaporator 2, the evaporator 2 communicates with the surge tank 5 through the first pipeline, the surge tank 5 communicates with the turbine 7 through the second pipeline, and the turbine 7 communicates with the condenser through the third pipeline 8, the condenser 8 communicates with the liquid storage tank 10 through the fourth pipeline, the liquid storage tank 10 communicates with the evaporator 2 through the fifth pipeline, and the working fluid pump 11 is arranged on the fifth pipeline, which also includes a bypass pipeline 4 , the bypass pipeline 4 is connected in parallel with the surge tank 5, one end of the bypass pipeline 4 communicates with the first pipeline, and the other end communicates with the second pipeline, the first shut-off valve 3 is arranged on the first pipeline, and the bypass pipeline 4 is provided with a second cut-off valve 6 .

Then when the system enters the stable load stage, the outlet of the evaporator 2 is steam that meets the requirements of the turbine inlet parameters. At this time, the system flow and pressure have tended to be stable, the fluctuation is small, and the function of the surge tank 5 is no longer obvious. One cut-off valve 3, open the second cut-off valve 6, so that the working medium no longer passes through the surge tank 5, but directly passes through the bypass pipe 4, and the steam flowing out of the evaporator 2 will bypass the surge tank 5 and directly flow through The bypass pipeline 4 enters the turbine 7, avoiding the reheating of the working fluid in the surge tank 5, and reducing the heat dissipation loss of the surge tank 5.

Wherein, the second cut-off valve 6 is an electric valve, mainly because it is unsafe to operate manually in view of the high temperature environment.

Wherein, the condenser 8 is provided with a cooling tower 9, the cooling medium of the cooling tower 9 is water, and the working medium pump 11 is a pneumatic pump.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. a kind of organic Rankine cycle devices, including heater, evaporimeter, vacuum tank, turbine, condenser, fluid reservoir and work Matter pump, wherein,

The heater is used to provide heat for the evaporimeter,

The evaporimeter is connected by the first pipeline with the vacuum tank, and the vacuum tank is connected by the second pipeline with the turbine Logical, the turbine is connected by the 3rd pipeline with the condenser, and the condenser is connected by the 4th pipeline with the fluid reservoir Logical, the fluid reservoir is connected by the 5th pipeline with the evaporimeter,

The working medium pump is arranged on the 5th pipeline,

Characterized in that,

Also include bypass duct, the bypass duct is in parallel with the vacuum tank, one end of the bypass duct and described first Pipeline connection, its other end and second pipeline connection,

The first shutoff valve is provided with first pipeline,

The second shutoff valve is provided with the bypass duct.

2. organic Rankine cycle devices according to claim 1, it is characterised in that second shutoff valve is motor-driven valve Door.

3. organic Rankine cycle devices according to claim 1, it is characterised in that cooling is provided with the condenser Tower, the cooling medium of the cooling tower is water.

4. organic Rankine cycle devices according to claim 1, it is characterised in that the working medium pump is air driven pump.