CN213668068U - Slag water recycling system without scaling and blocking - Google Patents
Slag water recycling system without scaling and blocking Download PDFInfo
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- CN213668068U CN213668068U CN202022540580.7U CN202022540580U CN213668068U CN 213668068 U CN213668068 U CN 213668068U CN 202022540580 U CN202022540580 U CN 202022540580U CN 213668068 U CN213668068 U CN 213668068U
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Abstract
The utility model discloses a scaling-free and blockage-free slag-water recycling system, which comprises a slag system water replenishing pipeline, a slag conveyor, a furnace bottom slag pool, a slag-water machine adding pool, a clear water pool, a coagulant adding system, a slag bin, a draining collecting pool, a natural ventilation cooling tower and a tower pool; the export of coagulant aid medicine system links to each other with the coagulant aid medicine mouth that the sediment water machine adds the pond, the bottom export that the sediment water machine adds the pond links to each other with the income cinder notch in sediment storehouse, the waterlogging caused by excessive rainfall export in sediment storehouse links to each other with the water inlet of waterlogging caused by excessive rainfall collecting pit, the delivery port of waterlogging caused by excessive rainfall collecting pit links to each other with the water inlet in sediment pond, be provided with high-efficient heat exchanger in the clean water pond, the cooling water outlet of high-efficient heat exchanger links to each other with the water inlet of natural draft cooling tower, the outlet of natural draft cooling tower links to each other with the water inlet of column sump, the delivery port of column sump links to each other with.
Description
Technical Field
The utility model relates to a waste water treatment system of thermal power plant, concretely relates to sediment water cyclic utilization system that no scale deposit was not blockked up.
Background
A slag removing system of a water immersion type scraper slag remover adopts a typical slag water circulation flow of slag remover slag water → a slag overflow pit → a concentrator → a buffer pool → a slag remover, and as the heat of the slag water in the circulation can not be dissipated in time, the slag remover is generally excessively supplemented with water in order to maintain the temperature of the sealing water at the bottom of the furnace to be lower than 60 ℃, so that the slag water overflows to an external environment or other systems. At present, in order to solve the environmental protection problem caused by slag water overflow, a wet deslagging thermal power plant is generally modified in two forms, the first form is that a heat exchanger is additionally arranged behind a flow buffer water tank, slag water flows through a pipe pass, cooling water flows through a shell pass, and circulating water is generally selected as cooling water; the second form is that a heat exchanger is additionally arranged in the scraper slag extractor, because the internal space of the slag extractor is limited, the flow channel of the built-in heat exchanger is narrow, the selectable cooling water is generally circulating water, the problem that the heat exchanger is blocked by the circulating water also exists, and the efficiency of the heat exchanger is gradually reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a sediment water cyclic utilization system that no scale deposit is not blockked up, the problem that the heat exchanger blockked up can be solved effectively to this system.
In order to achieve the purpose, the slag water recycling system without scale and blockage of the utility model comprises a slag system water replenishing pipeline, a slag dragging machine, a furnace bottom slag water tank, a slag water machine adding tank, a clear water tank, a coagulant adding system, a slag bin, a draining collecting tank, a natural ventilation cooling tower and a tower tank;
the slag system water replenishing pipeline is connected with a water replenishing inlet of the slag conveyor, an overflow water discharge port of the slag conveyor is connected with a water inlet of a slag pool at the bottom of the furnace, a water outlet of the slag pool at the bottom of the furnace is connected with a water inlet of the slag pool, a water outlet of the slag pool is connected with a water inlet of the slag motor adding pool, a water outlet of the slag motor adding pool is connected with a water inlet of the clean water pool, and a water outlet of the clean water pool is connected with a water replenishing inlet of the slag conveyor;
the export of coagulant aid medicine system links to each other with the coagulant aid that slag tapping machine adds the pond adds the medicine mouth, the bottom export that slag tapping machine adds the pond links to each other with the income cinder notch in sediment storehouse, the waterlogging caused by excessive rainfall export in sediment storehouse links to each other with the water inlet of waterlogging caused by excessive rainfall collecting pit, the delivery port of waterlogging caused by excessive rainfall collecting pit links to each other with the water inlet in sediment pond, be provided with high-efficient heat exchanger in the clean water pond, the cooling water outlet of high-efficient heat exchanger links to each other with the water inlet of natural draft cooling tower, the outlet of natural draft cooling tower links to each other with the water inlet of column cisterna.
The water outlet of the furnace bottom slag water tank is connected with the water inlet of the slag water tank through a furnace bottom slag water lifting pump.
The water outlet of the slag pool is connected with the water inlet of the slag water machine feeding pool through a slag pool lifting pump, and a coagulant aid feeding system is linked with the slag pool lifting pump.
The water outlet of the clean water tank is connected with the water replenishing inlet of the slag conveyor through a slag water circulating pump.
The inside of the slag salvaging machine is provided with a water temperature and liquid level monitoring device, and the slag system water replenishing pipeline is provided with a slag salvaging machine water replenishing valve, wherein the slag salvaging machine water replenishing valve is interlocked with the slag salvaging machine water temperature and liquid level monitoring device.
The slag water machine is provided with a sludge pump at the outlet of the bottom of the slag water machine, the outlet of the sludge pump is connected with the slag inlet of the slag bin, and the slag outlet of the slag bin is communicated with the slag outward transportation system.
The water outlet of the draining collecting pool is connected with the water inlet of the slag pool through a draining lifting pump.
The water outlet of the tower pool is connected with the cooling water inlet of the high-efficiency heat exchanger through a cooling water circulating pump.
The device also comprises a tower pool industrial water replenishing pipeline; the tower pond is provided with a liquid level monitoring device, a tower pond industrial water replenishing pipeline is communicated with a water replenishing port of the natural ventilation cooling tower, a tower pond industrial water replenishing valve is arranged on the tower pond industrial water replenishing pipeline, and the tower pond industrial water replenishing valve is linked with the liquid level monitoring device.
The utility model discloses following beneficial effect has:
no scale deposit does not have sediment water cyclic utilization system of jam when concrete operation, during the sediment water entered into the clean water basin through sediment pond, sediment water machine with the pond, be provided with high-efficient heat exchanger in the clean water basin simultaneously, wherein, the sediment water is at the outer wall of high-efficient heat exchanger, the circulation of industry cooling water is in high-efficient heat exchanger, carries out the heat transfer through natural draft cooling tower and air simultaneously to avoid high-efficient heat exchanger scale deposit to block up, in order to improve the heat exchange efficiency of high-efficient heat exchanger, easy operation, it is convenient, the practicality is extremely strong.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a slag dragging machine, 2 is a furnace bottom slag water tank, 3 is a slag water tank, 4 is a slag water machine adding tank, 5 is a coagulant aid adding system, 6 is a clear water tank, 7 is a high-efficiency heat exchanger, 8 is a slag bin, 9 is a slag outward transportation system, 10 is a draining collecting tank, 11 is a natural ventilation cooling tower, 12 is a tower tank, A is a furnace bottom slag water lifting pump, B is a slag water tank lifting pump, C is a slag water circulating pump, D is a draining lifting pump, E is a cooling water circulating pump, W is a slag dragging machine water temperature and liquid level monitoring device, DF1 is a slag dragging machine water supplementing valve, Y is a liquid level monitoring device, and DF2 is a tower tank water supplementing valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the non-scaling and non-blocking slag-water recycling system of the present invention comprises a slag system water replenishing pipeline, a slag conveyor 1, a furnace bottom slag water tank 2, a slag water tank 3, a slag water machine adding tank 4, a clean water tank 6, a coagulant aid adding system 5, a slag bin 8, a draining collection tank 10, a natural ventilation cooling tower 11 and a tower tank 12; slag system moisturizing pipeline links to each other with the moisturizing entry of dragveyer 1, the overflow water calandria mouth of dragveyer 1 links to each other with the water inlet of stove bottom slag pond 2, the outlet of stove bottom slag pond 2 links to each other through stove bottom slag water elevator pump A and the water inlet of slag pond 3, the delivery port of slag pond 3 links to each other with the water inlet that the pond 4 was added to the sediment pond elevator pump B and sediment water machine, the delivery port that the pond 4 was added to the sediment water machine links to each other with the water inlet of clean water basin 6, the delivery port of clean water basin 6 links to each other with the moisturizing mouth entry of dragveyer 1 through sediment water circulating pump C.
A water temperature and liquid level monitoring device W is arranged in the slag salvaging machine 1, a slag salvaging machine water supplementing valve DF1 is arranged on a slag system water supplementing pipeline, wherein the slag salvaging machine water supplementing valve DF1 is interlocked with the slag salvaging machine water temperature and liquid level monitoring device W.
The outlet of the coagulant aid feeding system 5 is connected with the coagulant aid feeding port of the slag water machine feeding tank 4, and the coagulant aid feeding system 5 is linked with the flow of the slag water tank lift pump B.
The bottom exit that the sediment water machine adds pond 4 is equipped with the dredge pump, and the export of dredge pump links to each other with the income cinder notch in sediment storehouse 8, and the cinder notch in sediment storehouse 8 is linked together with sediment outward transport system 9, and the waterlogging caused by excessive rainfall export in sediment storehouse 8 links to each other with the water inlet of waterlogging caused by excessive rainfall collecting pit 10, and the delivery port of waterlogging caused by excessive rainfall collecting pit 10 links to each other with the water inlet of sediment pond 3 through waterlogging caused by excessive rainfall elevator pump D.
The clean water tank 6 is internally provided with a high-efficiency heat exchanger 7, a cooling water outlet of the high-efficiency heat exchanger 7 is connected with a water inlet of a natural ventilation cooling tower 11, a water outlet of the natural ventilation cooling tower 11 is connected with a water inlet of a tower tank 12, and a water outlet of the tower tank 12 is connected with a cooling water inlet of the high-efficiency heat exchanger 7 through a cooling water circulating pump E.
The tower pool 12 is provided with a liquid level monitoring device Y, a tower pool industrial water replenishing pipeline is communicated with a water replenishing port of the natural ventilation cooling tower 11, a tower pool industrial water replenishing valve DF2 is arranged on the tower pool industrial water replenishing pipeline, and the tower pool industrial water replenishing valve DF2 is interlocked with the liquid level monitoring device Y.
The utility model discloses a concrete working process does:
1) overflow water of the slag conveyor 1 automatically flows into a furnace bottom slag water pool 2, slag overflow water of the furnace bottom slag water pool 2 is sent into a slag water pool 3 through a furnace bottom slag water lifting pump A and then sent into a slag water machine adding pool 4 through a slag water pool lifting pump B, and is coagulated and clarified in the slag water machine adding pool 4 to remove suspended matters in the slag water, reduce turbidity and simultaneously cool;
2) clear water in the slag water machine adding pool 4 automatically flows into a clear water pool 6, a plurality of groups of efficient heat exchangers 7 are arranged in the clear water pool 6, the heat exchange is carried out with slag water, the heat of the slag water is taken away, and the cooled clear water is sent into the slag conveyor 1 through a slag water circulating pump C;
3) the inside of the clean water tank 6 is provided with a guide wall, the clean water flows around the guide wall in an S shape in the clean water tank 6, cooling water and slag water carry out heat exchange in a convection manner, the heat exchange efficiency is improved, the high-efficiency heat exchangers 7 are arranged in parallel, and when one high-efficiency heat exchanger 7 fails, the performance of other heat exchangers is not influenced;
4) a water temperature and liquid level monitoring device W is arranged in the slag conveyor 1, a water supplementing valve DF1 of the slag conveyor is interlocked with the water temperature and liquid level monitoring device W to ensure that the water temperature of the boiler sealing water is lower than a control value, generally set at 60 ℃, and the liquid level of the slag conveyor 1 is in a control range;
5) coagulant and coagulant aid are added into the slag water machine adding tank 4 to improve the treatment efficiency and treatment effect;
6) the sludge discharged from the slag water machine adding pool 4 is sent into a slag bin 8 through a sludge discharge pump, the drained slag is transported outside, drained water is collected into a draining collection pool 10, and then sent into a slag pool 3 through a draining lifting pump D for centralized treatment;
7) the high-efficiency heat exchanger 7 and the natural ventilation cooling tower 11 form a circulating water system, cooling water after heat exchange with slag water through the high-efficiency heat exchanger 7 enters the natural ventilation cooling tower 11, and is recycled after heat exchange and cooling with air;
8) the tower pool 12 is provided with a liquid level monitoring device Y, and the industrial water replenishing valve DF2 of the tower pool is interlocked with the liquid level monitoring device Y to ensure the liquid level of the tower pool 12.
Example one
In a certain 4X 300MW coal-fired unit, ash and slag are separated and removed, a scraper slag conveyor 1 is adopted, and the specific treatment process is as follows:
1) the overflow water of the #1 to #4 slag dragger 1 automatically flows into the corresponding # 1 to #4 furnace bottom slag water tank 2, the temperature of the overflow water of the slag dragger 1 is about 55 to 60 ℃, and the slag overflow water of the #1 to #4 furnace bottom slag water tank 2 is about 400m3The slag water is sent into the slag water pool 3 through the furnace bottom slag water lifting pump A, and the volume of the slag water pool 3 is about 500m3Sending the slag water into a slag water machine adding pool 4 through a slag water pool lifting pump B, wherein the slag water machine adding pool 4 comprises 2 groups, the diameter of each group of slag water machine adding pool 4 is about 10m, the hydraulic retention time is about 1.3h, slag water is coagulated and clarified in the slag water machine adding pool 4, suspended matters in the slag water are removed, the turbidity is reduced, the temperature of effluent is less than 10NTU, and the temperature of the effluent is about 42-45 ℃;
2) clear water in the slag water machine feeding tank 4 automatically flows into the clear water tank 6, and the volume of the clear water tank 6 is about 600m3A plurality of groups of high-efficiency heat exchangers 7 are arranged in the clean water tank 6, and the heat exchange area of the high-efficiency heat exchangers 7 is 600m2The high-efficiency heat exchanger 7 has the advantages of shock resistance, impact resistance, corrosion resistance and high heat exchange performance (the heat conductivity coefficient at 60 ℃ is more than or equal to 24.3W/(m)2Temperature-)) to exchange heat with the slag water to take away the heat of the slag water, and the cooled clean water is about 32 ℃ and is sent into each slag dragging machine 1 through a slag water circulating pump C;
3) the inside of the clean water tank 6 is provided with a guide wall, the clean water flows around the guide wall in an S shape in the clean water tank 6, cooling water and slag water carry out heat exchange in a convection manner, the heat exchange efficiency is improved, a plurality of groups of efficient heat exchangers 7 are arranged in parallel, and when one efficient heat exchanger 7 fails, the performance of other heat exchangers is not influenced;
4) the slag conveyor 1 is provided with a water temperature and liquid level monitoring device W, a water supplementing valve DF1 of the slag conveyor is interlocked with the water temperature and liquid level monitoring device W of the slag conveyor to ensure that the water temperature of the boiler sealing water is lower than a control value, generally set at 60 ℃, and the liquid level of the slag conveyor 1 is in a control range;
5) coagulant polyferric and coagulant aid polyacrylamide are added into the slag water machine tank 4, so that the treatment efficiency and treatment effect are improved;
6) the sludge discharged from the slag water adding tank 4 is sent into a slag bin 8 through a sludge discharge pump, the drained slag is transported outside, the drained water is collected into a draining collection tank 10, and the drained water is sent into a slag water tank 3 through a draining lifting pump D for centralized treatment;
7) the high-efficiency heat exchanger 7 and the natural ventilation cooling tower 11 form a circulating water system, and the circulating water volume of the natural ventilation cooling tower 11 is 500m3The diameter is about 5.5m, the height is 6.2m, cooling water after heat exchange with slag water through the high-efficiency heat exchanger 7 enters the natural ventilation cooling tower 11, and is recycled after heat exchange with air and cooling;
8) a liquid level monitoring device Y is arranged in the tower pool 12, and a tower pool industrial water replenishing valve DF2 is interlocked with the liquid level monitoring device Y to ensure the liquid level of the tower pool 12.
The above description is only an example of the implementation steps of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A slag water recycling system without scaling and blocking is characterized by comprising a slag system water replenishing pipeline, a slag conveyor (1), a furnace bottom slag water tank (2), a slag water tank (3), a slag water machine adding tank (4), a clean water tank (6), a coagulant aid adding system (5), a slag bin (8), a draining collection tank (10), a natural ventilation cooling tower (11) and a tower tank (12);
the slag system water replenishing pipeline is connected with a water replenishing inlet of the slag conveyor (1), an overflow water discharge port of the slag conveyor (1) is connected with a water inlet of the slag pool (2) at the bottom of the furnace, a water outlet of the slag pool (2) at the bottom of the furnace is connected with a water inlet of the slag pool (3), a water outlet of the slag pool (3) is connected with a water inlet of the slag water dispenser adding pool (4), a water outlet of the slag water dispenser adding pool (4) is connected with a water inlet of the clean water pool (6), and a water outlet of the clean water pool (6) is connected with a water replenishing inlet of the slag conveyor (1);
the outlet of the coagulant aid dosing system (5) is connected with a coagulant aid dosing port of the slag water machine dosing tank (4), the bottom outlet of the slag water machine dosing tank (4) is connected with a slag inlet of the slag bin (8), a draining outlet of the slag bin (8) is connected with a water inlet of the draining collecting tank (10), a water outlet of the draining collecting tank (10) is connected with a water inlet of the slag water tank (3), a high-efficiency heat exchanger (7) is arranged in the clean water tank (6), a cooling water outlet of the high-efficiency heat exchanger (7) is connected with a water inlet of the natural ventilation cooling tower (11), a water outlet of the natural ventilation cooling tower (11) is connected with a water inlet of the tower tank (12), and a water outlet of the tower tank (12) is connected with a cooling water inlet of the high-efficiency heat exchanger (7).
2. The slag water recycling system without scale and blockage according to claim 1, wherein a water outlet of the slag water pool (2) is connected with a water inlet of the slag water pool (3) through a slag water lift pump (A).
3. The slag water recycling system without scale and blockage according to claim 1, wherein a water outlet of the slag water tank (3) is connected with a water inlet of the slag water machine feeding tank (4) through a slag water tank lifting pump (B), and the coagulant aid feeding system (5) is interlocked with the slag water tank lifting pump (B).
4. The slag water recycling system without scale and blockage according to claim 1, wherein a water outlet of the clean water tank (6) is connected with a water replenishing inlet of the slag conveyor (1) through a slag water circulating pump (C).
5. The scale-free and blockage-free slag water recycling system according to claim 1, wherein a water temperature and liquid level monitoring device (W) is arranged in the slag salvaging machine (1), a slag salvaging machine water supplementing valve (DF1) is arranged on a slag system water supplementing pipeline, and the slag salvaging machine water supplementing valve (DF1) is interlocked with the slag salvaging machine water temperature and liquid level monitoring device (W).
6. The slag water recycling system without scale and blockage according to claim 1, further comprising a slag outward conveying system (9), wherein a sludge discharge pump is arranged at a bottom outlet of the slag water machine adding pool (4), an outlet of the sludge discharge pump is connected with a slag inlet of the slag bin (8), and a slag outlet of the slag bin (8) is communicated with the slag outward conveying system (9).
7. The slag water recycling system without scale and blockage according to claim 1, wherein the water outlet of the leaching collecting tank (10) is connected with the water inlet of the slag water tank (3) through a leaching lift pump (D).
8. The slag water recycling system without scale and blockage according to claim 1, wherein a water outlet of the tower tank (12) is connected with a cooling water inlet of the high-efficiency heat exchanger (7) through a cooling water circulating pump (E).
9. The slag water recycling system without scale and blockage according to claim 1, further comprising a tower pond industrial water replenishing pipeline; the tower pool (12) is provided with a liquid level monitoring device (Y), a tower pool industrial water replenishing pipeline is communicated with a water replenishing port of the natural ventilation cooling tower (11), a tower pool industrial water replenishing valve (DF2) is arranged on the tower pool industrial water replenishing pipeline, and the tower pool industrial water replenishing valve (DF2) is interlocked with the liquid level monitoring device (Y).
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| CN202022540580.7U CN213668068U (en) | 2020-11-05 | 2020-11-05 | Slag water recycling system without scaling and blocking |
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| CN202022540580.7U CN213668068U (en) | 2020-11-05 | 2020-11-05 | Slag water recycling system without scaling and blocking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880320A (en) * | 2021-11-19 | 2022-01-04 | 华能武汉发电有限责任公司 | Utilize sediment water cyclic utilization system of sieve mesh precipitation segmentation scale control |
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2020
- 2020-11-05 CN CN202022540580.7U patent/CN213668068U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880320A (en) * | 2021-11-19 | 2022-01-04 | 华能武汉发电有限责任公司 | Utilize sediment water cyclic utilization system of sieve mesh precipitation segmentation scale control |
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