CN212901453U - Exhaust steam waste heat recovery system of power plant - Google Patents
Exhaust steam waste heat recovery system of power plant Download PDFInfo
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- CN212901453U CN212901453U CN202021453467.9U CN202021453467U CN212901453U CN 212901453 U CN212901453 U CN 212901453U CN 202021453467 U CN202021453467 U CN 202021453467U CN 212901453 U CN212901453 U CN 212901453U
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- heat exchanger
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- exhaust
- continuous blowdown
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Abstract
The utility model belongs to the technical field of the exhaust steam utilizes, especially, relate to a steam exhaust waste heat recovery system of power plant, include continuous blowdown flash tank (1) with gas furnace exhaust pipe (6) intercommunication, continuous blowdown flash tank (1) bottom is provided with decides row valve (11), decides row valve (11) and communicates through pipeline and drainage pond (3), and continuous blowdown flash tank (1) top is equipped with steam exhaust (12), and steam exhaust (12) are through going out steam pipe (7) and plate heat exchanger (2) intercommunication, plate heat exchanger (2) bottom sets up delivery port (14), and delivery port (14) are provided with drain pipe (8), plate heat exchanger (2) still are provided with water inlet (15). The utility model discloses lead the steam vent on continuous blowdown flash tank top to plate heat exchanger through going out the steam conduit, carry out the heat exchange with the condensate water, produce hydrophobic, collect these hydrophobic, can further be as the process water in other workshops, the water economy resource.
Description
Technical Field
The utility model belongs to the technical field of the exhaust steam utilizes, especially, relate to a power plant's exhaust steam waste heat recovery system.
Background
At present, after gas-liquid separation is carried out on saturated steam discharged by a gas furnace of a power plant through a continuous blowdown flash tank, the gas is directly discharged to the atmosphere from a steam outlet at the top end of the continuous blowdown flash tank, the natural environment is seriously influenced, environmental pollution and noise pollution are caused, water and heat loss in a thermodynamic system of the power plant is increased, and in addition, the heat cannot be recovered, and the waste of water resources is also caused. Particularly, in cold regions, the temperature is low in winter, and the steam discharged by the steam exhaust pipe is condensed into ice on nearby buildings, and the ice is thicker and thicker, so that the safe operation of a power plant is influenced.
Therefore, providing a device capable of recycling the exhaust steam of the power plant is a technical problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a power plant's steam extraction waste heat recovery system includes the continuous blowdown flash tank 1 with 6 intercommunications of gas furnace exhaust pipe, 1 bottom of continuous blowdown flash tank is provided with decides row valve 11, decides row valve 11 and passes through pipeline and drainage pond 3 intercommunications, and 1 top of continuous blowdown flash tank is equipped with steam vent 12, and steam vent 12 is through going out steam pipe 7 and 2 intercommunications of plate heat exchanger, 2 tops of plate heat exchanger are provided with steam outlet 13, and steam outlet 13 is through going out steam pipe 7 and 4 intercommunications of oxygen-eliminating device, 2 bottoms of plate heat exchanger set up delivery port 14, and delivery port 14 is provided with drain pipe 8, plate heat exchanger 2 still is provided with water inlet 15, water inlet 15 and condensate pipe 9 intercommunication.
The further proposal is that at least one valve 10 is arranged on the steam outlet pipeline 7, the drain pipeline 8 and the condensed water pipeline 9.
The further proposal is that one end of the condensed water pipeline 9 is provided with a condensed water pump.
The utility model has the advantages that:
(1) the utility model discloses lead the steam vent on continuous blowdown flash tank top to plate heat exchanger through going out the steam conduit, carry out the heat exchange with the condensate water, produce hydrophobic, collect these hydrophobic, can further be as the process water in other workshops, the water economy resource.
(2) The condensed water exchanges heat with the exhaust steam through the plate heat exchanger, the temperature of the condensed water can be increased from 38 ℃ to 60 ℃, heat recovery is realized, and the heat efficiency of the power plant is improved.
(3) The steam exhaust of the continuous blowdown flash tank is liquefied into hydrophobic water through the plate heat exchanger, and then is discharged into the atmosphere after passing through the deaerator, so that the environment is protected, the noise pollution is reduced, the steam exhausted from the steam exhaust pipe is not condensed into ice on nearby buildings, and the potential safety hazard is avoided.
Drawings
FIG. 1: the utility model is a schematic diagram of a connection structure;
description of reference numerals: 1 continuous blowdown flash tank, 2 plate heat exchangers, 3 drainage ponds, 4 oxygen-eliminating devices, 5 oxygen discharge doors, 6 gas furnace exhaust pipes, 7 steam outlet pipelines, 8 drain pipelines, 9 condensed water pipelines, 10 valves, 11 fixed discharge valves, 12 steam outlets, 13 steam outlets, 14 water outlets and 15 water inlets.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1, the embodiment provides a system for recovering waste heat of exhaust steam of a power plant, which comprises a continuous blowdown flash tank 1 communicated with an exhaust pipe 6 of a gas furnace, wherein a fixed discharge valve 11 is arranged at the bottom of the continuous blowdown flash tank 1, the fixed discharge valve 11 is communicated with a drainage pool 3 through a pipeline, an exhaust port 12 is arranged at the top of the continuous blowdown flash tank 1, the exhaust port 12 is communicated with a plate heat exchanger 2 through a steam outlet pipeline 7, a steam outlet 13 is arranged at the top of the plate heat exchanger 2, the steam outlet 13 is communicated with a deaerator 4 through the steam outlet pipeline 7, a water outlet 14 is arranged at the bottom of the plate heat exchanger 2, a drain pipeline 8 is arranged at the water outlet 14, the plate heat exchanger 2 is further provided with a water inlet 15, the water inlet 15 is, at least one valve 10 is arranged on each of the drain pipeline 8 and the condensate pipeline 9, and a condensate pump is further arranged at one end of the condensate pipeline 9.
In practical production application, saturated bubbles of a gas furnace are sent into a continuous blowdown flash tank 1 for gas-liquid separation, liquid is discharged into a drainage pool 3, and gas enters a plate type flash tank 2; the condensed water is pumped to the plate-type flash tank 2 through the condensed water pump to exchange heat with gas, so that the gas is liquefied into hydrophobic water, and the hydrophobic water is collected and utilized through the hydrophobic pipeline 8, thereby saving water resources. In the process, the temperature of the condensed water is increased from 38 ℃ to 60 ℃, so that heat recovery is realized, and the heat efficiency of the power plant is improved. The system liquefies the exhaust steam of the continuous blowdown flash tank 1 into hydrophobic steam through the plate heat exchanger 2, and exhausts the hydrophobic steam into the atmosphere through the deaerator 4, so that the environmental protection is facilitated, the noise pollution is reduced, and the steam exhausted from the exhaust pipe is condensed into ice on nearby buildings, so that the potential safety hazard is avoided.
It should be noted that, the working principle of the above-mentioned continuous blowdown flash tank 1 is to reduce the pressure and expand the continuous blowdown of the boiler, the blowdown water is adiabatically expanded and separated into secondary steam and waste hot water in the continuous blowdown flash tank, and through expanding, depressurizing, heat exchange in the flash tank, then discharge, the secondary steam is drawn by the specialized pipeline, the waste hot water is discharged automatically through the float level valve or overflow regulating valve, the heat energy can be recycled.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (3)
1. A power plant exhaust waste heat recovery system is characterized by comprising a continuous blowdown flash tank (1) communicated with a gas furnace exhaust pipe (6), the bottom of the continuous blowdown flash tank (1) is provided with a fixed exhaust valve (11), the fixed exhaust valve (11) is communicated with the drainage pool (3) through a pipeline, the top of the continuous blowdown flash tank (1) is provided with a steam outlet (12), the steam outlet (12) is communicated with the plate-type heat exchanger (2) through a steam outlet pipeline (7), the top of the plate heat exchanger (2) is provided with a steam outlet (13), the steam outlet (13) is communicated with the deaerator (4) through a steam outlet pipeline (7), a water outlet (14) is arranged at the bottom of the plate heat exchanger (2), a drain pipeline (8) is arranged at the water outlet (14), the plate heat exchanger (2) is further provided with a water inlet (15), and the water inlet (15) is communicated with the condensed water pipeline (9).
2. A power plant exhaust steam waste heat recovery system according to claim 1, characterized in that at least one valve (10) is arranged on each of the steam outlet pipe (7), the drain pipe (8) and the condensate pipe (9).
3. A power plant exhaust steam waste heat recovery system according to claim 2, characterized in that one end of the condensed water pipeline (9) is provided with a condensed water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021453467.9U CN212901453U (en) | 2020-07-22 | 2020-07-22 | Exhaust steam waste heat recovery system of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021453467.9U CN212901453U (en) | 2020-07-22 | 2020-07-22 | Exhaust steam waste heat recovery system of power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212901453U true CN212901453U (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021453467.9U Active CN212901453U (en) | 2020-07-22 | 2020-07-22 | Exhaust steam waste heat recovery system of power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212901453U (en) |
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2020
- 2020-07-22 CN CN202021453467.9U patent/CN212901453U/en active Active
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