CN210831947U - Waste heat power generation condensate comprehensive recovery system - Google Patents

Waste heat power generation condensate comprehensive recovery system Download PDF

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CN210831947U
CN210831947U CN201921579616.3U CN201921579616U CN210831947U CN 210831947 U CN210831947 U CN 210831947U CN 201921579616 U CN201921579616 U CN 201921579616U CN 210831947 U CN210831947 U CN 210831947U
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tank
drain
water
steam
flash tank
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CN201921579616.3U
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李用法
蒋鹏仪
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Copper Branch Yunnan Tin Co ltd
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Copper Branch Yunnan Tin Co ltd
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Abstract

The waste heat power generation condensed water comprehensive recovery system is connected with a waste heat boiler (8) and a steam turbine set (9), and the waste heat boiler provides steam for the steam turbine set through a steam pipeline (10); the recovery system is provided with a blowdown flash tank (1), a sewage draining tank (2) connected with the blowdown flash tank in parallel, a drain flash tank (3), a drain tank (4) connected with the drain flash tank in parallel, a deaerator (5), a circulating water tank (6) and a condenser (7). The utility model discloses can realize the hydrophobic comprehensive recovery of boiler blow off water, steam conduit and the hydrophobic steam turbine unit, realize the zero outer row of soda.

Description

Waste heat power generation condensate comprehensive recovery system
Technical Field
The utility model relates to a waste heat utilization technology field, concretely relates to waste heat power generation condensate comprehensive recovery system.
Background
A large amount of condensed water can be generated in the production process of waste heat power generation, and the sources of the condensed water which can be recovered mainly comprise boiler blow-off water, steam pipeline drainage and steam turbine unit drainage. This part of the condensed water has a higher temperature, and the heat in the condensed water can be recycled. The traditional way is that the condensate water is led into single open recovery unit like drain tank, blowdown water tank or closed recovery unit like the flash tank and is retrieved, and steam directly discharges to the external world usually, only can retrieve partial comdenstion water, and not only recovery efficiency is low, has still caused the waste of heat and condensate water, and outer steam of arranging and the condensate water has still caused adverse effect to the environment.
Disclosure of Invention
The utility model aims at the above problem, provide a recovery system is synthesized to waste heat power generation condensate water that recovery efficiency is high, the zero outer row of soda, nimble practicality are synthesized to the comdenstion water.
The utility model adopts the following technical scheme:
the waste heat power generation condensed water comprehensive recovery system is connected with a waste heat boiler and a steam turbine unit, and the waste heat boiler supplies steam to the steam turbine unit through a steam pipe; the recovery system is provided with a blowdown flash tank, a sewage discharge tank connected with the blowdown flash tank in parallel, a drainage flash tank, a drainage tank connected with the drainage flash tank in parallel, a deaerator, a circulating water tank and a condenser;
the blowdown flash tank and the sewage discharge tank are both connected with the waste heat boiler through pipelines, blowdown water in the waste heat boiler is introduced into the blowdown flash tank or the sewage discharge tank, and a first water inlet valve and a second water inlet valve are respectively arranged on water inlet pipelines of the blowdown flash tank and the sewage discharge tank; the top of the blowdown flash tank is connected with a steam pipeline for introducing steam into the deaerator, the bottom of the blowdown flash tank is connected with a drain pipe for introducing condensed water in the tank into a circulating water tank, and a first drain valve is arranged on the drain pipe;
the drain flash tank is respectively connected with the steam pipeline and the steam turbine set through a drain pipe, condensed water in the steam pipeline and condensed water in the steam turbine set are introduced into the drain flash tank, and a drain valve, namely a third water inlet valve of the drain flash tank, is arranged on the drain pipeline; the top of the drainage flash tank is connected with a steam pipeline for introducing steam into the deaerator; the bottom of the drainage flash tank is provided with a drain pipe which leads the condensed water in the tank into a circulating water pool and a deaerator respectively, and the drain pipe is provided with a second drain valve;
a drain pipeline of the steam turbine unit is divided into two paths to be led to a drain tank and a drain flash tank, a fourth water inlet valve is arranged on the drain pipeline led to the drain tank, a drain pipe for leading condensed water in the tank into a circulating water tank and a deaerator is arranged at the bottom of the drain tank, and a second drain valve is arranged on the drain pipe;
the deaerator is connected with the waste heat boiler through a pipeline and is used for conveying the heated and deaerated feed water to the waste heat boiler;
the condenser is connected with a steam outlet of the steam turbine unit through a pipeline, a circulating pipeline is connected between the condenser and the circulating water tank, circulating cooling water is continuously fed into the condenser and continuously cools hot steam in the condenser, and the condenser is connected with the deaerator through a pipeline.
The utility model discloses the hydrophobic flash tank and the blowdown flash tank that set up can do not retrieve the different condensate water in source, and the secondary steam and the comdenstion water of separating can be retrieved and recycled. The blowdown flash tank is parallelly connected with the blowdown water tank, can switch in a flexible way, is exclusively used in recovery boiler blow-down water, and the secondary steam that the separation obtained discharges into the oxygen-eliminating device retrieval and utilization, can continue to heat exhaust-heat boiler feedwater, and the comdenstion water that the separation obtained discharges into the circulating water pond and regard as the make-up water. The drain flash tank is connected with the drain tank in parallel, can be flexibly switched, is specially used for draining a recovery steam pipeline and draining a steam turbine set, secondary steam obtained by separation is discharged into a deaerator for recycling, water in the waste heat boiler can be continuously heated, and condensed water obtained by separation is discharged into a circulating water tank as supplementary water or discharged into the deaerator as supplementary water according to a conductivity monitoring result. The utility model discloses utilize the drainage flash tank to connect in parallel with the blowdown water tank and blowdown flash tank and the parallelly connected joint use of drainage tank, can realize the nimble switching of open recovery mode and closed recovery mode.
The utility model discloses to the different various condensate water strong adaptability of quality of water, retrieve effectual, waste heat utilization rate high, economic benefits is good.
Drawings
FIG. 1 is a schematic view of a recovery system of the present invention;
fig. 2 is a flow chart of the present invention for recovering condensed water.
Detailed Description
As shown in fig. 1, the waste heat power generation condensed water comprehensive recovery system is connected with a waste heat boiler 8 and a steam turbine set 9, and the waste heat boiler 8 provides steam to the steam turbine set 9 through a steam pipeline 10. The recovery system is provided with a blowdown flash tank 1, a sewage draining tank 2 connected with the blowdown flash tank in parallel, a drain flash tank 3, a drain tank 4 connected with the drain flash tank in parallel, a deaerator 5, a circulating water tank 6 and a condenser 7.
The blowdown flash tank 1 and the sewage discharge tank 2 are both connected with the waste heat boiler 8 through pipelines, blowdown water in the waste heat boiler is introduced into the blowdown flash tank 1 or the sewage discharge tank 2, and a first water inlet valve 1-1 and a second water inlet valve 2-1 are respectively arranged on water inlet pipelines of the blowdown flash tank and the sewage discharge tank; the top of the blowdown flash tank is connected with a steam pipeline for introducing steam into the deaerator, the bottom of the blowdown flash tank is connected with a drain pipe for introducing condensed water in the tank into a circulating water tank, and a first drain valve 1-2 is arranged on the drain pipe.
The drain flash tank 3 is respectively connected with a steam pipeline 10 and a steam turbine set 9 through a drain pipe, condensed water in the steam pipeline and condensed water in the steam turbine set are introduced into the drain flash tank, and a drain valve, namely a third water inlet valve 3-1 of the drain flash tank, is arranged on the drain pipeline; the top of the drainage flash tank is connected with a steam pipeline for introducing steam into the deaerator; and the bottom of the drainage flash tank is provided with a drain pipe for respectively introducing the condensed water in the tank into the circulating water pool and the deaerator, and the drain pipe is provided with a second drain valve 3-2.
The drain tank is respectively connected with the deaerator and the circulating water tank through a drain pipe, and a drain valve 4-2 is arranged on the drain pipe; the bottom of the drainage flash tank is provided with a drainage valve, and collected condensed water is respectively introduced into a circulating water pool and a deaerator. The drain pipeline of the steam turbine set 9 is divided into two paths to a drain tank and a drain flash tank, and a fourth water inlet valve 4-1 is arranged on the drain pipeline leading to the drain tank.
The deaerator is connected with the waste heat boiler through a pipeline and conveys the heated feed water to the waste heat boiler.
The condenser 7 is connected with a steam discharge port of the steam turbine set 9 through a pipeline, a circulating pipeline is connected between the condenser and the circulating water tank, cooling water continuously circulates between the circulating water tank and the condenser and continuously condenses hot steam in the condenser, and the condenser is connected with a deaerator through a pipeline.
The utility model discloses equipment and device in the system are prior art equipment like blowdown flash tank 1, hydrophobic flash tank 3, oxygen-eliminating device 5, condenser 7, all can directly purchase in the market. The sewage draining tank 2 and the drain tank 4 can be manufactured by themselves. The waste heat boiler 8 and the steam turbine set 9 are existing devices.
The utility model discloses the system can realize the hydrophobic comprehensive recovery of boiler blow off water, steam conduit and the hydrophobic steam turbine unit after normally working, realizes the outer row of soda zero.
The utility model discloses a waste heat power generation condensate comprehensive recovery method, as shown in figure 1 and figure 2, according to the difference of waste heat boiler blow-off water, steam pipeline drainage and steam turbine unit drainage quality of water respectively according to different routes to retrieve, wherein boiler blow-off water is retrieved through blowdown flash drum or blow-off water tank, steam pipeline drainage and steam turbine unit drainage are retrieved through drainage flash drum or drain tank; the specific method comprises the following steps:
the boiler blow-off water is recovered through the following steps:
a. opening a first water inlet valve 1-1 of the blowdown flash tank 1, carrying out blowdown of the waste heat boiler, discharging boiler blowdown water in the waste heat boiler into the blowdown flash tank, wherein the instantaneous flow of blowdown does not exceed 5t/h, and closing the water inlet valve of the blowdown flash tank after blowdown is finished;
b. starting the blowdown flash tank, carrying out adiabatic expansion on the boiler blowdown water in the blowdown flash tank, reducing the pressure to be below 0.1Mpa, and separating into secondary steam and condensate water;
c. the secondary steam is discharged into a deaerator 5 through a pipeline under the action of pressure difference, is sent into a waste heat boiler through the pipeline to be used for heating boiler feed water, a first drain valve 1-2 on a drain pipe is opened, and condensed water is discharged into a circulating water tank 6 through the drain pipe to serve as make-up water;
when the blowdown flash tank is maintained, closing a water inlet valve of the blowdown flash tank, opening a second water inlet valve 2-1 of a blowdown water tank 2, switching to a state that a standby blowdown water tank 2 receives boiler blowdown water in the waste heat boiler, and discharging the water into a circulating water tank for recycling through a blowdown water valve 2-2 after the blowdown water is collected by the blowdown water tank;
the steam pipeline drainage and the steam turbine unit drainage are recovered through the following steps:
a. opening two third water inlet valves 3-1 of the drainage flash tank 3, and closing a fourth water inlet valve 4-1 of the drainage tank 4;
b. the steam pipeline drainage and the steam turbine unit drainage respectively enter a drainage flash tank through a third water inlet valve on a drainage pipeline;
c. starting a hydrophobic flash tank, carrying out adiabatic expansion on hydrophobic, reducing the pressure to be below 0.1Mpa, and separating into secondary steam and condensed water;
d. the secondary steam is discharged into the deaerator 5 through a pipeline under the action of pressure difference and is sent into the waste heat boiler through the pipeline to be used for heating boiler feed water; the second drain valve 3-2 is opened, and the condensed water makes different responses according to the conductivity:
i. if the conductivity is more than or equal to 5us/cm, discharging the condensed water into a deaerator to be used as make-up water;
if the conductivity is less than 5us/cm, discharging the condensed water into a circulating water pool as make-up water;
e. steam discharged by the turbine unit enters a condenser through a pipeline, cooling water continuously circulates between the condenser and a circulating water pool to cool hot steam in the condenser, and the steam is condensed into condensed water and then is sent to a deaerator through the pipeline to serve as make-up water;
f. when the drain flash tank is maintained, the third water inlet valve 3-1 is closed, the fourth water inlet valve 4-1 on the pipeline connecting the steam turbine set and the drain tank is opened, and the standby drain tank is switched to receive the steam turbine set for draining; opening a drain valve 4-2 on a drain pipe of the drain tank, and making different responses according to the conductivity by draining:
i. if the conductivity is less than 5us/cm, draining the drained water into a deaerator to be used as make-up water;
if the conductivity is more than or equal to 5us/cm, draining the drained water into a circulating water pool as make-up water;
and the condensed water in the drain tank is respectively sent into a circulating water pool or a deaerator through pipelines to be used as make-up water.

Claims (1)

1. The comprehensive recovery system for the waste heat power generation condensed water is characterized in that the recovery system is connected with a waste heat boiler (8) and a steam turbine set (9), and the waste heat boiler (8) provides steam for the steam turbine set (9) through a steam pipeline (10); the recovery system is provided with a blowdown flash tank (1), a sewage discharge tank (2) connected with the blowdown flash tank in parallel, a drain flash tank (3), a drain tank (4) connected with the drain flash tank in parallel, a deaerator (5), a circulating water tank (6) and a condenser (7);
the blowdown flash tank (1) and the blowdown water tank (2) are both connected with the waste heat boiler (8) through pipelines, blowdown water in the waste heat boiler is introduced into the blowdown flash tank (1) or the blowdown water tank (2), and a first water inlet valve (1-1) and a second water inlet valve (2-1) are respectively arranged on water inlet pipelines of the blowdown flash tank and the blowdown water tank; the top of the blowdown flash tank is connected with a steam pipeline for introducing steam into the deaerator, the bottom of the blowdown flash tank is connected with a drain pipe for introducing condensed water in the tank into a circulating water pool, and a first drain valve (1-2) is arranged on the drain pipe;
the drain flash tank (3) is respectively connected with a steam pipeline (10) and a steam turbine set (9) through a drain pipe, condensed water in the steam pipeline and condensed water in the steam turbine set are introduced into the drain flash tank, and a drain valve, namely a third water inlet valve (3-1) of the drain flash tank, is arranged on the drain pipeline; the top of the drainage flash tank is connected with a steam pipeline for introducing steam into the deaerator; the bottom of the drainage flash tank is provided with a drain pipe for respectively leading condensed water in the tank into a circulating water pool and a deaerator, and the drain pipe is provided with a second drain valve (3-2);
the bottom of the drain tank is provided with a drain pipe which leads the drain in the tank into the circulating water pool and the deaerator respectively, and a drain valve (4-2) is arranged on the drain pipe; a drain pipeline of the steam turbine set (9) is divided into two paths to a drain tank and a drain flash tank, and a fourth water inlet valve (4-1) is arranged on the drain pipeline leading to the drain tank;
the deaerator is connected with the waste heat boiler through a pipeline and is used for conveying the heated and deaerated feed water to the waste heat boiler;
the condenser (7) is connected with a steam outlet of the steam turbine set (9) through a pipeline, a circulating pipeline is connected between the condenser and the circulating water tank, cooling water in the circulating water tank continuously circulates and continuously condenses hot steam in the condenser (7), and the condenser is connected with the deaerator through a pipeline.
CN201921579616.3U 2019-09-23 2019-09-23 Waste heat power generation condensate comprehensive recovery system Active CN210831947U (en)

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Application Number Priority Date Filing Date Title
CN201921579616.3U CN210831947U (en) 2019-09-23 2019-09-23 Waste heat power generation condensate comprehensive recovery system

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Application Number Priority Date Filing Date Title
CN201921579616.3U CN210831947U (en) 2019-09-23 2019-09-23 Waste heat power generation condensate comprehensive recovery system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500574A (en) * 2019-09-23 2019-11-26 云南锡业股份有限公司铜业分公司 Cogeneration condensed water comprehensive recovery system and recovery method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500574A (en) * 2019-09-23 2019-11-26 云南锡业股份有限公司铜业分公司 Cogeneration condensed water comprehensive recovery system and recovery method

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