Heat supply steam extraction and drainage waste heat recovery system for thermal power plant

Abstract

The utility model discloses a thermal power plant heat supply steam extraction drainage waste heat recovery system which comprises a west heat supply pipeline, a plant area auxiliary steam pipe and an east heat supply pipeline, a west side heat supply steam extraction drainage recovery assembly and an east side heat supply steam extraction drainage recovery assembly are the same in configuration, the west side heat supply steam extraction drainage recovery assembly comprises the west heat supply pipeline, and the east side heat supply steam extraction drainage recovery assembly comprises the east heat supply pipeline. The west heat supply pipeline is fixedly connected with a first heat supply pipeline drain pipe, the output end of the first heat supply pipeline drain pipe is fixedly connected with a first drain pump, and the output end of the first drain pump is connected with a first recovery main pipe. The water quality is classified according to the sampling result in the chemical workshop, when the water quality is good, the water becomes qualified demineralized water through dosing treatment, the qualified demineralized water returns to a condensation water system of a main workshop and then returns to a unit for circulation, and when the water quality is general, the water flows to a factory domestic water tank to serve as domestic water which can be used in dormitories, canteens, laundry rooms and the like, and water resource recycling is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery systems for heat supply steam extraction and drainage in thermal power plants, in particular to a waste heat recovery system for heat supply steam extraction and drainage in thermal power plants. Background Art

[0002] Due to the low pressure, long pipelines and drainage points close to the ground, it is difficult for the drainage in the factory to flow back to the chemical workshop by gravity. Therefore, it is necessary to use a pipeline booster pump to increase the pressure of the drainage pipeline so that it can return to the chemical workshop for treatment. However, due to the large number of drainage points, the cost of configuring a booster pump for each pipeline is too high, which is not convenient for energy saving and environmental protection, and is not conducive to the reuse of water after classification and testing. It is not conducive to reducing the cost of water reuse. Utility Model Content

[0003] The utility model aims to provide a waste heat recovery system for steam extraction and drainage in a thermal power plant to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A thermal power plant heating extraction steam drain waste heat recovery system comprises a west heating pipeline, a plant auxiliary steam pipe, and an east heating pipeline. The west heating extraction steam drain recovery component and the east heating extraction steam drain recovery component are configured in the same manner. The west heating extraction steam drain recovery component comprises the west heating pipeline. The west heating pipeline is fixedly connected to a first heating pipeline drain pipe. The output end of the first heating pipeline drain pipe is fixedly connected to a first drain pump. The output end of the first drain pump is connected to a first recovery mother pipe. A first sampling tube is installed on the outer wall of the first recovery mother pipe. The output end of the first recovery mother pipe is fixedly connected to a chemical workshop circulation pipe. The output end of the chemical workshop circulation pipe is connected with return water to a steam engine room condensate system, a plant domestic water tank, and a wastewater tank.

[0006] In a preferred embodiment of the present utility model, the plant area auxiliary steam pipe is connected to an auxiliary steam drain pipe, the output end of the auxiliary steam drain pipe is fixedly connected to a second drain pump, and the output end of the second drain pump is connected to a second recovery main pipe.

[0007] In a preferred embodiment of the present utility model, the outer wall of the second recovery main pipe is connected to the second sampling pipe, and the second recovery main pipe is connected to the chemical workshop circulation pipe.

[0008] In a preferred embodiment of the present invention, the chemical workshop circulation pipe is connected to return water to the steam engine room condensate system through a first return pipe, and the chemical workshop circulation pipe is connected to the plant domestic water tank through a second return pipe.

[0009] In a preferred implementation manner of the present utility model, the east heating pipeline is connected to the second heating pipeline drain pipe, and the output end of the second heating pipeline drain pipe is connected to the third drain pump.

[0010] In a preferred implementation manner of the present utility model, the output end of the third drain pump is connected to a third recovery mother pipe, and the outer wall of the third recovery mother pipe is connected to a third sampling pipe.

[0011] In a preferred embodiment of the present utility model, the output end of the third recovery main pipe is connected to the chemical workshop circulation pipe, and the output end of the chemical workshop circulation pipe is connected to the wastewater tank through a sewage pipe.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

[0013] After being pressurized by the drain pump, the water can be returned to the chemical workshop through the existing pipe corridor or low ground piers. The water quality will be classified according to the sampling results in the chemical workshop. When the water quality is good, it will be treated by adding chemicals to become qualified desalted water and returned to the condensate system of the main plant, and then returned to the unit for circulation. When the water quality is average, it will flow to the domestic water tank in the factory area and be used as domestic water for dormitories, canteens, laundries, etc., realizing the reuse of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 The diagram shows the working process structure of a waste heat recovery system for steam extraction and drainage in a thermal power plant. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] Example 1: Figure 1, including a west heating pipeline 100, a plant auxiliary steam pipe 200, and an east heating pipeline 300. The west heating extraction steam drain recovery component and the east heating extraction steam drain recovery component have the same configuration. The west heating extraction steam drain recovery component includes the west heating pipeline 100. The west heating pipeline 100 is fixedly connected to the first heating pipeline drain pipe 170. The output end of the first heating pipeline drain pipe 170 is fixedly connected to the first drain pump 110. The output end of the first drain pump 110 is connected to the first recovery mother pipe 120. The outer wall of the first recovery mother pipe 120 is installed with a first sampling pipe 130. The output end of the first recovery mother pipe 120 is fixedly connected to the chemical workshop circulation pipe 140. The output end of the chemical workshop circulation pipe 140 is connected to the return water to the steam engine room condensate system 160, the plant domestic water tank 260, and the wastewater tank 360.

[0018] The specific usage scenario of this embodiment is as follows: the west heating pipeline 100 and the east heating pipeline 300 are configured the same to meet the hot water supply of the entire plant. The chemical workshop circulation pipe 140 is provided to recycle the water of the waste heat of the heating extraction and drainage, so as to recycle the water and save water. The waste water tank 360 is used to discharge the water with poor water quality.

[0019] Example 2: Figure 1 , including a west heating pipeline 100, a plant auxiliary steam pipe 200, and an east heating pipeline 300. The west heating extraction steam drain recovery component and the east heating extraction steam drain recovery component have the same configuration. The west heating extraction steam drain recovery component includes the west heating pipeline 100. The west heating pipeline 100 is fixedly connected to the first heating pipeline drain pipe 170. The output end of the first heating pipeline drain pipe 170 is fixedly connected to the first drain pump 110. The output end of the first drain pump 110 is connected to the first recovery mother pipe 120. The outer wall of the first recovery mother pipe 120 is installed with a first sampling pipe 130. The output end of the first recovery mother pipe 120 is fixedly connected to the chemical workshop circulation pipe 140. The output of the chemical workshop circulation pipe 140 The end is connected with return water to the turbine room condensate system 160, the plant domestic water tank 260, and the wastewater tank 360. The plant auxiliary steam pipe 200 is connected to the auxiliary steam drain pipe 210. The output end of the auxiliary steam drain pipe 210 is fixedly connected to the second drain pump 220. The output end of the second drain pump 220 is connected to the second recovery main pipe 230. The outer wall of the second recovery main pipe 230 is connected to the second sampling pipe 240. The second recovery main pipe 230 is connected to the chemical workshop circulation pipe 140. The chemical workshop circulation pipe 140 is connected to the return water to the turbine room condensate system 160 through the first return pipe 150. The chemical workshop circulation pipe 140 is connected to the plant domestic water tank 260 through the second return pipe 250.

[0020] The specific usage scenario of this embodiment is: by setting up an auxiliary steam drain pipe 210 and using it in conjunction with the auxiliary steam drain pipe 210, it is used to exchange water for heat. By setting up a second drain pump 220, the water in the auxiliary steam drain pipe 210 is recovered to the second recovery mother pipe 230, and the water is sampled and tested through the second sampling pipe 240. According to the results of the water quality test, the water with better quality is transported to the return water to the steam engine room condensate system 160, and the water with general water quality test results is transported to the plant domestic water tank 260. When the test result is poor, the output end is connected to the wastewater tank 360 through the sewage pipe 350.

[0021] Example 3: Figure 1 The east heating pipeline 300 is connected to the second heating pipeline drain pipe 310, the output end of the second heating pipeline drain pipe 310 is connected to the third drain pump 320, the output end of the third drain pump 320 is connected to the third recovery mother pipe 330, the outer wall of the third recovery mother pipe 330 is connected to the third sampling pipe 340, the output end of the third recovery mother pipe 330 is connected to the chemical workshop circulation pipe 140, and the output end of the chemical workshop circulation pipe 140 is connected to the wastewater tank 360 through the sewage pipe 350.

[0022] The specific usage scenario of this embodiment is: when the test result is good, the water is treated by adding chemicals in the first return water pipe 150, and then returned to the steam engine room condensate system 160 for reuse. When the water quality test result is average, the water in the chemical workshop circulation pipe 140 is returned to the factory domestic water tank 260 through the second return water pipe 250. When the water quality test result is poor, the water in the chemical workshop circulation pipe 140 is returned to the wastewater tank 360 through the sewage pipe 350.

[0023] The working principle of the utility model is as follows: when in use, a person skilled in the art heats the west heating line 100 and the east heating line 300, connects the west heating line 100 with the first heating line drain pipe 170, connects the east heating line 300 with the second heating line drain pipe 310, then transports the water in the first heating line drain pipe 170 to the chemical workshop circulation pipe 140 through the first drain pump 110, transports the water in the second heating line drain pipe 310 to the chemical workshop circulation pipe 140 through the third drain pump 320, connects the plant area auxiliary steam pipe 200 with the auxiliary steam drain pipe 210, and transports the water in the second heating line drain pipe 310 to the chemical workshop circulation pipe 140 through the second drain pump 220. The auxiliary steam drain pipe 210 is pumped into the chemical workshop circulation pipe 140, and the water in the chemical workshop circulation pipe 140 is tested through the first sampling pipe 130, the second sampling pipe 240, and the third sampling pipe 340. When the test result is good, the water is treated by adding chemicals in the first return pipe 150, and then returned to the steam engine room condensate system 160 for reuse. When the water quality test result is average, the water in the chemical workshop circulation pipe 140 is returned to the plant area domestic water tank 260 through the second return pipe 250. When the water quality test result is poor, the water in the chemical workshop circulation pipe 140 is returned to the wastewater tank 360 through the sewage pipe 350.

[0024] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat extraction steam drainage waste heat recovery system for a thermal power plant, comprising a west heating pipeline (100), a plant area auxiliary steam pipe (200), and an east heating pipeline (300), characterized in that: The west side heating extraction steam drain recovery component and the east side heating extraction steam drain recovery component are configured in the same manner. The west side heating extraction steam drain recovery component comprises a west heating pipeline (100). The west heating pipeline (100) is fixedly connected to a first heating pipeline drain pipe (170). The output end of the first heating pipeline drain pipe (170) is fixedly connected to a first drain pump (110). The output end of the first drain pump (110) is connected to a first recovery mother pipe (120). A first sampling pipe (130) is installed on the outer wall of the first recovery mother pipe (120). The output end of the first recovery mother pipe (120) is fixedly connected to a chemical workshop circulation pipe (140). The output end of the chemical workshop circulation pipe (140) is connected to return water to a steam engine room condensate system (160), a plant area domestic water tank (260), and a wastewater tank (360).

2. A thermal power plant heating extraction steam drainage waste heat recovery system according to claim 1, characterized in that: The plant area auxiliary steam pipe (200) is connected to the auxiliary steam drain pipe (210), the output end of the auxiliary steam drain pipe (210) is fixedly connected to the second drain pump (220), and the output end of the second drain pump (220) is connected to the second recovery main pipe (230).

3. A thermal power plant heat supply extraction steam drainage waste heat recovery system according to claim 2, characterized in that: The outer wall of the second recovery main pipe (230) is connected to the second sampling pipe (240), and the second recovery main pipe (230) is connected to the chemical workshop circulation pipe (140).

4. A thermal power plant heating extraction steam drainage waste heat recovery system according to claim 3, characterized in that: The chemical workshop circulation pipe (140) is connected to return water to the steam engine room condensate system (160) through a first return pipe (150), and the chemical workshop circulation pipe (140) is connected to the factory area domestic water tank (260) through a second return pipe (250).

5. A thermal power plant heating extraction steam drainage waste heat recovery system according to claim 1, characterized in that: The east heating pipeline (300) is connected to the second heating pipeline drain pipe (310), and the output end of the second heating pipeline drain pipe (310) is connected to the third drain pump (320).

6. A thermal power plant heat supply extraction steam drainage waste heat recovery system according to claim 5, characterized in that: The output end of the third drain pump (320) is connected to the third recovery mother pipe (330), and the outer wall of the third recovery mother pipe (330) is connected to the third sampling pipe (340).

7. A thermal power plant heat supply steam extraction and drainage waste heat recovery system according to claim 6, characterized in that: The output end of the third recovery main pipe (330) is connected to the chemical workshop circulation pipe (140), and the output end of the chemical workshop circulation pipe (140) is connected to the wastewater tank (360) through the sewage pipe (350).

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