CN210602866U - Turbid circulating water cooling device for VOD - Google Patents
Turbid circulating water cooling device for VOD Download PDFInfo
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- CN210602866U CN210602866U CN201921298013.6U CN201921298013U CN210602866U CN 210602866 U CN210602866 U CN 210602866U CN 201921298013 U CN201921298013 U CN 201921298013U CN 210602866 U CN210602866 U CN 210602866U
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Abstract
The utility model discloses a VOD turbid circulating water cooling device, which comprises a VOD hot water pool and a VOD cold water pool; the top of the VOD hot water pool is connected with an industrial circulating water replenishing pipe, one end of the VOD hot water pool, a hot water pump and a cooling tower form a circulating loop, the hot water pump comprises a first hot water pump and a second hot water pump, and the cooling tower comprises a first cooling tower, a second cooling tower, a third cooling tower and a fourth cooling tower; the VOD cold water tank is connected with a VOD furnace flue gas cooling water device through a water feeding pump to supply water to a user; the top of the VOD cold water pool is connected with an industrial fresh water replenishing pipe; the other end of the VOD furnace flue gas cooling water device is connected with a chemical oil remover, the chemical oil remover precipitates the on-site backwater, one end of the chemical oil remover is connected with the centrifugal dehydrator, and the other end of the chemical oil remover is connected with the VOD hot water pool. The utility model further reduces the water supply temperature while exerting the cooling function of the existing cooling tower, and meets the requirement of stable production on the spot of the user; the safety of the system is improved.
Description
Technical Field
The utility model relates to a turbid circulating water heat sink of VOD belongs to water treatment technical field.
Background
The water system of the Tai steel energy power main plant is mainly responsible for treating circulating cooling water of roller ways, equipment and the like of production lines of companies, the water quality of supplied water mainly comprises temperature, suspended matters, hardness, conductivity and the like, and some systems such as a steel-making south area 3#The continuous casting VOD turbid ring requires that the water supply temperature is less than or equal to 32 ℃, but the temperature reduction facility of the water system is only a cooling tower, and the treatment process is shown in figure 1.
In actual production operation, along with the acceleration of the steelmaking rhythm, the original design uses 15m3H, vacuumizing by steam, and gradually increasing to about 30m3H steam. Therefore, the return water temperature far exceeds the design value, the original water system cooling facility cannot meet the production requirement, and particularly the summer temperature often exceeds the standard. And the production rhythm is guaranteed by reducing the temperature on site. Therefore, only low-temperature water can be supplemented for replacement in summer, so that the effect of cooling is achieved, and the production requirement is ensured.
The problem that needs to be solved urgently is to improve the turbid circulating cooling process in a certain procedure, reduce the water supply temperature to the maximum extent and meet the production requirement.
Disclosure of Invention
In order to overcome the defects, the utility model aims to provide a VOD turbid circulating water cooling device, when the cooling effect of the existing cooling tower of performance, the water supply temperature is further reduced, and the requirement of stable production on the spot of the user is met.
The utility model provides a VOD turbid circulating water cooling device, which comprises a VOD hot water pool and a VOD cold water pool;
the top of the VOD hot water pool is connected with an industrial circulating water replenishing pipe, one end of the VOD hot water pool, a hot water pump and a cooling tower form a circulating loop, the hot water pump comprises a first hot water pump and a second hot water pump, and the cooling tower comprises a first cooling tower, a second cooling tower, a third cooling tower and a fourth cooling tower; the four cooling towers are arranged in parallel, two cooling towers share one hot water pump, and a first electric valve is arranged between the first hot water pump and the second hot water pump; the first hot water pump is connected with the first cooling tower and the second cooling tower through a water inlet pipeline, the second hot water pump is connected with the third cooling tower and the fourth cooling tower through a water inlet pipeline, and a fourth electric valve is arranged on a pipeline for connecting the second hot water pump with the third cooling tower and the fourth cooling tower; second electric valves are arranged on connecting pipelines of the first cooling tower and the second cooling tower and connecting pipelines of the third cooling tower and the fourth cooling tower; the bottom of the cooling tower is connected with a VOD cold water pool through a water outlet pipeline, and a third electric valve is arranged on the water outlet pipeline; the fifth electric valve is arranged on a pipeline between the water outlet pipeline of the cooling tower and the VOD hot water pool;
the VOD cold water tank is connected with a VOD furnace flue gas cooling water device through a water feeding pump to supply water to a user; the top of the VOD cold water pool is connected with an industrial fresh water replenishing pipe; the other end of the VOD furnace flue gas cooling water device is connected with a chemical oil remover, the chemical oil remover precipitates the on-site backwater, one end of the chemical oil remover is connected with the centrifugal dehydrator, and the other end of the chemical oil remover is connected with a VOD hot water pool;
and (4) pumping the bottom sludge to a centrifugal dehydrator through a slurry pump for treatment, and clarifying water to a VOD hot water tank.
The VOD hot water pool stores the incoming water of the chemical oil remover and conveys the water to the cooling tower through a hot water pump.
The water feeding pump comprises a first water feeding pump and a second water feeding pump which are connected in parallel.
The industrial fresh water replenishing pipe is DN100mm pipe, and the industrial circulating water replenishing pipe is DN150mm pipe.
And a slurry pump is arranged on a connecting pipeline of the chemical oil remover and the centrifugal dehydrator.
The utility model has the advantages that: the cooling effect of the existing cooling tower is exerted, and meanwhile, the water supply temperature is further reduced, so that the requirement of stable production on site of a user is met; the safety of the system is improved.
Drawings
FIG. 1 is a block diagram of a prior art temperature reduction process.
Fig. 2 is a diagram of the VOD turbid circulating water cooling device of the present invention.
In the figure: 1 is VOD hot-water tank, 2 is first hot-water pump, 3 is the second hot-water pump, 4 is first electric valve, 5 is first cooling tower, 6 is the second cooling tower, 7 is the third cooling tower, 8 is the fourth cooling tower, 9 is the fourth electric valve, 10 is the second electric valve, 11 is the third electric valve, 12 is the fifth electric valve, 13 is the VOD cold water pond, 14 is first water feed pump, 15 is the second water feed pump, 16 is VOD stove flue gas cooling water installation, 17 is the chemical degreaser, 18 is centrifugal dehydrator, 19 is the sediment stuff pump, 20 is industry new water moisturizing pipe, 21 is industry circulating water moisturizing pipe.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
as shown in fig. 2, the utility model provides a VOD turbid circulating water cooling device, which comprises a VOD hot water tank 1 and a VOD cold water tank 13;
the top of the VOD hot water pool 1 is connected with an industrial circulating water replenishing pipe, one end of the VOD hot water pool 1, a hot water pump and a cooling tower form a circulating loop, the hot water pump comprises a first hot water pump 2 and a second hot water pump 3, and the cooling tower comprises a first cooling tower 5, a second cooling tower 6, a third cooling tower 7 and a fourth cooling tower 8; the four cooling towers are arranged in parallel, two cooling towers share one hot water pump, and a first electric valve 4 is arranged between the first hot water pump 2 and the second hot water pump 3; the first hot water pump 2 is connected with the first cooling tower 5 and the second cooling tower 6 through a water inlet pipeline, the second hot water pump 3 is connected with the third cooling tower 7 and the fourth cooling tower 8 through a water inlet pipeline, and a fourth electric valve 9 is arranged on a pipeline for connecting the second hot water pump 3 with the third cooling tower 7 and the fourth cooling tower 8; second electric valves 10 are arranged on connecting pipelines of the first cooling tower 5, the second cooling tower 6, the third cooling tower 7 and the fourth cooling tower 8; the bottom of the cooling tower is connected with a VOD cold water pool 13 through a water outlet pipeline, and a third electric valve 11 is arranged on the water outlet pipeline; the fifth electric valve 12 is arranged on a pipeline between the water outlet pipeline of the cooling tower and the VOD hot water pool 1;
the VOD cold water tank 13 is connected with a VOD furnace flue gas cooling water device 16 through a water feeding pump to supply water for users; the top of the VOD cold water pool 13 is connected with an industrial fresh water replenishing pipe 20; the other end of the VOD furnace flue gas cooling water device 16 is connected with a chemical oil remover 17, the chemical oil remover 17 precipitates on-site backwater, one end of the chemical oil remover 17 is connected with a centrifugal dehydrator 18, and the other end of the chemical oil remover is connected with a VOD hot water pool 1; under the action of the chemical oil remover 17, the bottom sludge is pumped to a centrifugal dehydrator 18 through a slurry pump 19 for treatment, and the clarified water is delivered to a VOD hot water pool 1.
The VOD hot water pool 1 stores the incoming water of the chemical degreaser and delivers the water to the cooling tower through a hot water pump.
The feed water pump includes a first feed water pump 14 and a second feed water pump 15, which are connected in parallel.
The industrial fresh water replenishing pipe 20 is DN100mm pipe, and the industrial circulating water replenishing pipe 21 is DN150mm pipe.
And a slurry pump 19 is arranged on a connecting pipeline of the chemical oil remover 17 and the centrifugal dehydrator 18.
From 2003, the water system of Tai Steel steelmaking second factory is put into production to date, 3#The continuous casting VOD turbid circulation system is technically improved due to the problem of temperature reduction, and is arranged in a first cooling tower and a second cooling tower (the cooling capacity is 400m each3H) two cooling towers are added in sequence, namely the third cooling tower (700 m)3H), fourth (300 m)3H) cooling towers. But the effect is not ideal.
To achieve a reduction of 3#The feed water temperature of the continuous casting VOD turbid circulation system is firstly measured and calculated by the heat value. The temperature of the on-site return water, the circulating water amount, the temperature of the supplementary water, the water amount of the supplementary water and other parameters are comprehensively measured, calculated and analyzed, part of the return water of the system is subjected to secondary cooling and then mixed with the rest of the return water to supply water, and the cooling effect can be achieved. Therefore, according to the technical scheme of the invention, the method specifically comprises the following steps:
⑴3#the circulating water quantity of the continuous casting VOD turbid circulation system is 750-780m3The cooling capacity of the first cooling tower and the second cooling tower is 800m3H, and the cooling capacity of the third and fourth cooling towers is 1000 m3Therefore, the first and second cooling towers are used as the secondary cooling system, and the third and fourth cooling towers are used as 3#And (5) carrying out production operation on cooling equipment of the continuous casting VOD turbid circulation system.
⑵ the improvement of the process requires modification of partial system pipelines, that is, the pipelines of the first and second cooling tower outlet pipes are changed from the cold water pool to the hot water pool, and corresponding control valves are added.
⑶ the functions of the two hot water pumps are set as that the first hot water pump is the cooling pump of the first and the second cooling towers, the second hot water pump is the cooling pump of the third and the fourth cooling towers for cooling, and the cooling water enters the VOD cold water pool and is supplied to the user by the water supply pump.
⑷ the water supply pipeline of one of the two original hot water pumps is modified, the water outlet pipeline is connected on the basis of keeping the original function unchanged, and the pipelines of the first and second cooling towers and corresponding valves and other auxiliary facilities are added.
On the basis of the original process, a first hot water pump water outlet pipe is newly laid to a first cooling tower and a second cooling tower, the first water outlet pipe and the second water outlet pipe are connected to a hot water tank by a cold water tank, and a fifth electric valve and accessory facilities are added. And a second electric valve and accessory facilities are additionally arranged on the water inlet pipelines of the original first cooling tower, the original second cooling tower, the original third cooling tower and the original fourth cooling tower. And a second hot water pump water outlet pipe is newly laid to the third cooling tower and the fourth cooling tower, and a third electric door and accessory facilities are added between the original first cooling tower and the original second cooling tower and between the original third cooling tower and the original fourth cooling tower. A fourth electric valve and accessory facilities are added on the water outlet pipe of the original hot water pump, so that the improved process and the original process can be mutually switched. The improved process and the original process can be mutually switched, and a VOD turbid circulating water cooling device is added on the basis of the original process, so that the safety of the system is improved.
Passing through Pair Tai Steel 3#The improvement of the continuous casting VOD turbid ring cooling process has good effect: 3#The continuous casting VOD turbid circulation water supply temperature can meet the production requirements of users, particularly in summer with the highest air temperature, the water supply temperature can be reduced by 3-4 ℃, and the normal production of the users can be basically maintained. Meanwhile, after the feed water temperature is reduced, the water supplement amount of the low-temperature water of the system is reduced, 5000 tons (about four months) are reduced in summer each month, about 5 ten thousand tons of low-temperature water supplement amount can be reduced all the year round, important conditions are created for energy conservation and consumption reduction, the production line production stopping time caused by excessive temperature is stopped, and the production loss is stopped。
In winter, the ambient temperature is reduced, the water supply temperature can meet the production requirements of users, the first cooling tower and the second cooling tower do not need to be cooled for the second time, and the system is switched into 4 cooling towers for direct cooling.
Claims (5)
1. The utility model provides a turbid circulating water heat sink of VOD which characterized in that: comprises a VOD hot water pool and a VOD cold water pool;
the top of the VOD hot water pool is connected with an industrial circulating water replenishing pipe, one end of the VOD hot water pool, a hot water pump and a cooling tower form a circulating loop, the hot water pump comprises a first hot water pump and a second hot water pump, and the cooling tower comprises a first cooling tower, a second cooling tower, a third cooling tower and a fourth cooling tower; the four cooling towers are arranged in parallel, two cooling towers share one hot water pump, and a first electric valve is arranged between the first hot water pump and the second hot water pump; the first hot water pump is connected with the first cooling tower and the second cooling tower through a water inlet pipeline, the second hot water pump is connected with the third cooling tower and the fourth cooling tower through a water inlet pipeline, and a fourth electric valve is arranged on a pipeline for connecting the second hot water pump with the third cooling tower and the fourth cooling tower; second electric valves are arranged on connecting pipelines of the first cooling tower and the second cooling tower and connecting pipelines of the third cooling tower and the fourth cooling tower; the bottom of the cooling tower is connected with a VOD cold water pool through a water outlet pipeline, and a third electric valve is arranged on the water outlet pipeline; the fifth electric valve is arranged on a pipeline between the water outlet pipeline of the cooling tower and the VOD hot water pool;
the VOD cold water tank is connected with a VOD furnace flue gas cooling water device through a water feeding pump to supply water to a user; the top of the VOD cold water pool is connected with an industrial fresh water replenishing pipe; the other end of the VOD furnace flue gas cooling water device is connected with a chemical oil remover, the chemical oil remover precipitates the on-site backwater, one end of the chemical oil remover is connected with the centrifugal dehydrator, and the other end of the chemical oil remover is connected with the VOD hot water pool.
2. The VOD turbid circulating water cooling device according to claim 1, characterized in that: the VOD hot water pool stores the incoming water of the chemical oil remover and conveys the water to the cooling tower through a hot water pump.
3. The VOD turbid circulating water cooling device according to claim 1, characterized in that: the water feeding pump comprises a first water feeding pump and a second water feeding pump which are connected in parallel.
4. The VOD turbid circulating water cooling device according to claim 1, characterized in that: the industrial fresh water replenishing pipe is DN100mm pipe, and the industrial circulating water replenishing pipe is DN150mm pipe.
5. The VOD turbid circulating water cooling device according to claim 1, characterized in that: and a slurry pump is arranged on a connecting pipeline of the chemical oil remover and the centrifugal dehydrator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921298013.6U CN210602866U (en) | 2019-08-12 | 2019-08-12 | Turbid circulating water cooling device for VOD |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921298013.6U CN210602866U (en) | 2019-08-12 | 2019-08-12 | Turbid circulating water cooling device for VOD |
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| CN210602866U true CN210602866U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482095A (en) * | 2021-05-28 | 2021-10-08 | 中国能源建设集团江苏省电力设计院有限公司 | Back pressure type thermal power plant coupling type water supply system |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482095A (en) * | 2021-05-28 | 2021-10-08 | 中国能源建设集团江苏省电力设计院有限公司 | Back pressure type thermal power plant coupling type water supply system |
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