阅读说明：本技术 一种用于高炉煤气喷淋系统的循环水泵场 (Circulating water pump field for blast furnace gas spraying system ) 是由 黄俊雄 周翔 李颜宗 蒋静 王洋 何旭 舒熙航 于 2020-12-16 设计创作，主要内容包括：本发明涉及一种用于高炉煤气喷淋系统的循环水泵场,属于钢铁厂高炉煤气喷淋系统的循环水处理领域。包括喷淋供水池、两个以上的回水池和废水池；各回水池上设有将其串联的回水分配渠并对应设有阀门；回水池处理后的水流入喷淋供水池,杂质通过旁滤泵送至旁通过滤器,处理后的水排入喷淋供水池；喷淋供水池中的水通过喷淋供水泵送至管道过滤器,处理后送至喷淋塔；喷淋塔喷淋使用后的水作为回水汇集于回水分配渠以循环利用；旁通过滤器和管道过滤器分别通过排污管道与废水池连通；旁滤泵还通过换水管道与生产废水管网连通。通过独立控制每个回水池的回水来源的通断,实现在不影响高炉煤气喷淋系统正常运行情况下进行循环水清池置换的目的。(The invention relates to a circulating water pumping farm for a blast furnace gas spraying system, and belongs to the field of circulating water treatment of blast furnace gas spraying systems in steel plants. Comprises a spraying water supply tank, more than two water return tanks and a wastewater tank; each water return pool is provided with a water return distribution channel which is connected in series with the water return pool and is correspondingly provided with a valve; the water treated by the water return tank flows into a spray water supply tank, impurities are conveyed to a bypass filter through a bypass filter pump, and the treated water is discharged into the spray water supply tank; water in the spray water supply pool is sent to a pipeline filter through a spray water supply pump and sent to a spray tower after being treated; the water sprayed and used by the spray tower is collected in a return water distribution channel as return water for cyclic utilization; the bypass filter and the pipeline filter are respectively communicated with the wastewater tank through a sewage discharge pipeline; the side filter pump is also communicated with a production wastewater pipe network through a water exchange pipeline. The aim of replacing the circulating water cleaning tank under the condition of not influencing the normal operation of the blast furnace gas spraying system is fulfilled by independently controlling the on-off of the return water source of each return water tank.)

1. A circulating water pumping field for a blast furnace gas spraying system is characterized in that: comprises a spraying water supply tank, more than two water return tanks and a wastewater tank which are arranged at intervals; each return water pool is provided with a return water distribution channel which is connected in series with the return water pool, and the return water distribution channel is provided with a valve which is used for controlling the on-off of return water to each return water pool and corresponds to each return water pool; the partition wall of each water return tank and the spraying water supply tank is provided with a hole for water treated by the water return tank to flow into the spraying water supply tank; a bypass filter pump and a bypass filter are sequentially communicated from each water return tank to the spray water supply tank through corresponding pipelines, impurities treated by the water return tank are pumped into the bypass filter by the bypass filter for further treatment, water treated by the bypass filter is discharged into the spray water supply tank, and the bypass filter pump is also communicated with a production wastewater pipe network through a water exchange pipeline; the spraying water supply tank is sequentially communicated with a spraying water supply pump, a pipeline filter and a spraying tower through corresponding pipelines, the spraying water supply pump pumps water in the spraying water supply tank into the pipeline filter, and the water is treated by the pipeline filter and then is introduced into the spraying tower; the water sprayed and used by the spray tower is collected in a return water distribution channel as return water for cyclic utilization; the spraying water supply tank is communicated with a water replenishing pipeline for replenishing new water; the bypass filter and the pipeline filter are respectively communicated with a wastewater pool through a sewage discharge pipeline, the wastewater pool is communicated with a wastewater lifting pump, and the wastewater lifting pump is communicated with a production wastewater pipeline network.

2. The circulating water pumping farm of a blast furnace gas spraying system according to claim 1, characterized in that: the water outlet pipeline of the spraying water supply pump is provided with a corresponding electric valve and a corresponding manual valve; the water outlet pipelines of the side filter pump and the wastewater lifting pump are provided with corresponding manual valves; the water inlet pipeline of the bypass filter is provided with a corresponding electric valve and a corresponding manual valve; the water inlet pipeline and the water outlet pipeline of the pipeline filter are provided with corresponding manual valves; the water replenishing pipeline and the water exchanging pipeline are provided with corresponding electric valves and manual valves.

3. The circulating water pumping farm of a blast furnace gas spraying system according to claim 1, characterized in that: the spraying water supply tank is also respectively communicated with a sustained-release scale inhibitor dosing device and a NaOH dosing device.

4. The circulating water pumping plant of a blast furnace gas spraying system according to claim 3, characterized in that: the pond mouth that sprays water supply tank, return water pond and wastewater disposal basin is provided with corresponding apron respectively, sprays the water supply pump setting on the apron that sprays water supply tank, and slowly-releasing antisludging agent charge device, NaOH charge device, bypass filter and other filtration pump set up on the apron of return water pond, and the waste water elevator pump sets up on the apron of wastewater disposal basin.

5. The circulating water pumping plant of a blast furnace gas spraying system according to claim 4, characterized in that: and a slag blocking plate extending into the water return pool is arranged on the lower surface of the cover plate of the water return pool.

6. The circulating water pumping plant of a blast furnace gas spraying system according to claim 4, characterized in that: and a cover plate of the return water tank is provided with a dosing groove corresponding to the slow-release scale inhibitor dosing device and the NaOH dosing device respectively, and the upper part of the dosing groove is provided with a rain shelter.

7. The circulating water pumping farm of a blast furnace gas spraying system according to claim 1, characterized in that: the bottom of the water return pool is gradually shallow from the water inlet side to the water outlet side according to a certain gradient.

8. The circulating water pumping plant of a blast furnace gas spraying system according to claim 2, characterized in that: the spraying water supply tank, the water return tank and the wastewater tank are all provided with corresponding liquid level meters, and corresponding numerical values are displayed through a display screen of an equipped electric cabinet and used for monitoring corresponding liquid levels; wherein, the level gauge that sprays the water supply tank is interlocked with the electric valve of moisturizing pipeline, and the level gauge and the waste water elevator pump in wastewater disposal basin are interlocked.

9. The circulating water pumping farm of a blast furnace gas spraying system according to claim 1, characterized in that: the spraying water supply pump, the side filter pump and the wastewater lifting pump are respectively arranged in parallel, and the corresponding water outlet branch pipe is provided with an on-site pressure gauge; corresponding pressure gauge, flowmeter, PH meter and thermometer are arranged on the water outlet main pipe of the spraying water supply pump, corresponding pressure gauge and flowmeter are arranged on the water outlet main pipe of the side filter pump and the wastewater lift pump, and corresponding numerical values are displayed through a display screen of an equipped electric cabinet to be used as monitoring of corresponding water outlet indexes.

10. The circulating water pumping plant of a blast furnace gas spraying system according to claim 2, characterized in that: the electric valve and the manual valve are in the form of any one or more of a butterfly valve, a ball valve and a gate valve.

Technical Field

The invention belongs to the field of circulating water treatment of blast furnace gas spraying systems in steel plants, and relates to a circulating water pumping farm for a blast furnace gas spraying system.

Background

The circulating water system is an important component of a blast furnace gas spraying system, and the water supply reliability and the water supply quality of the circulating water system directly relate to the cleaning effect of the blast furnace gas. In the operation process of the prior common process, the quality of the circulating water can be gradually deteriorated in the long-time use process, the concentration of impurities and suspended matters in the water can be continuously increased, and a spray head of a spray tower is led to be blocked, so that the gas spraying effect is reduced. In order to prevent the blockage of the spray head, the conventional method adopts manual pond cleaning and water changing, and although the method can avoid the blockage of the spray head to a certain extent, the following problems exist: the water tank needs to be completely emptied in the process of cleaning the water tank and changing the water, so that the circulating water system cannot work in the period of time, and the normal operation of the gas spraying system is influenced.

Disclosure of Invention

In view of the above, the present invention provides a circulating water pumping plant for a blast furnace gas spraying system, so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a circulating water pump field for a blast furnace gas spraying system comprises a spraying water supply tank, more than two water return tanks and a wastewater tank which are arranged at intervals; each return water pool is provided with a return water distribution channel which is connected in series with the return water pool, and the return water distribution channel is provided with a valve which is used for controlling the on-off of return water to each return water pool and corresponds to each return water pool; the partition wall of each water return tank and the spraying water supply tank is provided with a hole for water treated by the water return tank to flow into the spraying water supply tank; a bypass filter pump and a bypass filter are sequentially communicated from each water return tank to the spray water supply tank through corresponding pipelines, impurities treated by the water return tank are pumped into the bypass filter by the bypass filter for further treatment, water treated by the bypass filter is discharged into the spray water supply tank, and the bypass filter pump is also communicated with a production wastewater pipe network through a water exchange pipeline; the spraying water supply tank is sequentially communicated with a spraying water supply pump, a pipeline filter and a spraying tower through corresponding pipelines, the spraying water supply pump pumps water in the spraying water supply tank into the pipeline filter, and the water is treated by the pipeline filter and then is introduced into the spraying tower; the water sprayed and used by the spray tower is collected in a return water distribution channel as return water for cyclic utilization; the spraying water supply tank is communicated with a water replenishing pipeline for replenishing new water; the bypass filter and the pipeline filter are respectively communicated with a wastewater pool through a sewage discharge pipeline, the wastewater pool is communicated with a wastewater lifting pump, and the wastewater lifting pump is communicated with a production wastewater pipeline network.

Furthermore, a water outlet pipeline of the spray water supply pump is provided with a corresponding electric valve and a corresponding manual valve; the water outlet pipelines of the side filter pump and the wastewater lifting pump are provided with corresponding manual valves; the water inlet pipeline of the bypass filter is provided with a corresponding electric valve and a corresponding manual valve; the water inlet pipeline and the water outlet pipeline of the pipeline filter are provided with corresponding manual valves; the water replenishing pipeline and the water exchanging pipeline are provided with corresponding electric valves and manual valves.

Furthermore, the spraying water supply tank is also respectively communicated with a sustained-release scale inhibitor dosing device and a NaOH dosing device.

Further, the pond mouth that sprays water supply tank, return water pond and wastewater disposal basin is provided with corresponding apron respectively, sprays the water supply pump setting on the apron that sprays water supply tank, and slowly-releasing antisludging agent charge device, NaOH charge device, bypass filter and other filter pump setting are on the apron of return water pond, and the waste water elevator pump sets up on the apron of wastewater disposal basin.

Furthermore, the lower surface of the cover plate of the water return pool is provided with a slag baffle extending into the water return pool.

Further, a cover plate of the return water tank is provided with a dosing groove corresponding to the slow-release scale inhibitor dosing device and the NaOH dosing device respectively, and the upper part of the dosing groove is provided with a rain shelter.

Further, the bottom of the water return pool becomes shallow gradually from the water inlet side to the water outlet side according to a certain gradient.

Further, the spraying water supply tank, the water return tank and the wastewater tank are provided with corresponding liquid level meters, and corresponding numerical values are displayed through a display screen of an equipped electric cabinet and used for monitoring corresponding liquid levels; wherein, the level gauge that sprays the water supply tank is interlocked with the electric valve of moisturizing pipeline, and the level gauge and the waste water elevator pump in wastewater disposal basin are interlocked.

Furthermore, a plurality of spraying water supply pumps, side filter pumps and wastewater lifting pumps are respectively arranged in parallel, and local pressure gauges are arranged on corresponding water outlet branch pipes; corresponding pressure gauge, flowmeter, PH meter and thermometer are arranged on the water outlet main pipe of the spraying water supply pump, corresponding pressure gauge and flowmeter are arranged on the water outlet main pipe of the side filter pump and the wastewater lift pump, and corresponding numerical values are displayed through a display screen of an equipped electric cabinet to be used as monitoring of corresponding water outlet indexes.

Furthermore, the electric valve and the manual valve are in the form of any one or more of a butterfly valve, a ball valve and a gate valve.

The invention has the beneficial effects that:

the invention independently controls the on-off of the backwater source of each backwater pool through the backwater distribution channel and corresponding supporting facilities, thereby realizing the purpose of replacing the circulating water cleaning pool under the condition of not influencing the normal operation of the blast furnace gas spraying system when the water quality is deteriorated, finally improving the water supply safety and the water quality of the blast furnace gas spraying system and improving the operation efficiency.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a floor plan of the present invention;

fig. 3 is a cross-sectional view of the present invention.

Reference numerals: the system comprises a spraying water supply tank 1, a first return water tank 2, a second return water tank 3, a wastewater tank 4, a return water distribution channel 5, a manual gate valve 6, a bypass filter 7, a bypass filter 8, a spraying water supply pump 9, a pipeline filter 10, a wastewater lifting pump 11, a NaOH dosing device 12, a slow-release scale inhibitor dosing device 13, a water supplementing pipeline 14, a liquid level meter 15, an on-site pressure meter 16, a pressure meter 17, a flow meter 18, a PH meter 19, a thermometer 20, an electric valve 21, a manual valve 22, a cover plate 23, a slag blocking plate 24, a dosing groove 25 and a water changing pipeline 26.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 3, a circulating water pumping plant for a blast furnace gas spraying system includes a pumping plant body structure and corresponding supporting facilities. The pump farm body structure comprises a spray water supply pool 1, a first water return pool 2, a second water return pool 3 and a wastewater pool 4 which are arranged at intervals, and further comprises a water return distribution channel 5 which is arranged on the water inlet side of the first water return pool 2 and the second water return pool 3 and is connected with the water return distribution channel in series.

Valves for controlling the on-off of the backwater to the first backwater pool 2 and the second backwater pool 3 are respectively arranged on the backwater distribution channel 5 corresponding to the first backwater pool 2 and the second backwater pool 3, and the valves are manual gate valves 6; the partition walls of the first water returning pool 2 and the spraying water supply pool 1 and the partition walls of the second water returning pool 3 and the spraying water supply pool 1 are respectively provided with a hole, the height of each hole is 0.8-1.0 m, and water treated by the water returning pool flows into the spraying water supply pool 1; a bypass filter pump 7 and a bypass filter 8 are sequentially communicated from the first water return tank 2 and the second water return tank 3 to the spray water supply tank 1 through corresponding pipelines, impurities treated in the water return tank are pumped into the bypass filter 8 by the bypass filter pump 7 for further treatment, water treated by the bypass filter 8 is discharged into the spray water supply tank 1, and the bypass filter pump 7 is also communicated with a production wastewater pipe network through a water exchange pipeline; the spraying water supply tank 1 is sequentially communicated with a spraying water supply pump 9, a pipeline filter 10 and a spraying tower through corresponding pipelines, the spraying water supply pump 9 pumps water in the spraying water supply tank 1 into the pipeline filter 10, and the water is treated by the pipeline filter 10 and then is introduced into the spraying tower; the water sprayed and used by the spray tower is collected in a return water distribution channel 5 as return water for cyclic utilization; the spraying water supply tank 1 is communicated with a water replenishing pipeline 14 for replenishing new water; the bypass filter 8 and the pipeline filter 10 are respectively communicated with the wastewater tank 4 through a sewage discharge pipeline, the wastewater tank 4 is communicated with a wastewater lifting pump 11, and the wastewater lifting pump 11 is communicated with a production wastewater pipeline network.

The spraying water supply tank 1 is also respectively communicated with a slow-release scale inhibitor dosing device 13 and a NaOH dosing device 12.

The pond mouth that sprays water supply tank 1, first return water pond 2, second return water pond 3 and wastewater disposal basin 4 is provided with corresponding suitable quantity's apron 23 respectively, is provided with corresponding mounting base on the apron 23, and the mounting base height is 150 ~ 250 mm. According to actual needs, a plurality of spraying water supply pumps 9, a plurality of side filter pumps 7 and a plurality of waste water lifting pumps 11 can be arranged respectively. In this embodiment, three spray water supply pumps 9 are provided in parallel, are mounted on corresponding mounting bases of the cover plate 23 of the spray water supply tank 1, and are located on one side (water outlet side) away from the first water return tank 2 and the second water return tank 3. The slow-release scale inhibitor dosing device 13 and the NaOH dosing device 12 are arranged on the mounting bases of the corresponding cover plates 23 on one sides (water outlet sides) of the first water return tank 2 and the second water return tank 3 close to the spray water supply tank 1; two side filter pumps 7 are respectively arranged in parallel corresponding to the first water return pool 2 and the second water return pool 3, and the four side filter pumps 7 are arranged on the mounting bases of the corresponding cover plates 23 on one sides (water inlet sides) of the first water return pool 2 and the second water return pool 3 far away from the spraying water supply pool 1; the bypass filter 8 is arranged on the mounting base of the corresponding cover plate 23 between the slow-release scale inhibitor dosing device 13 and the bypass filter pump 7. Two waste water lift pumps 11 are arranged in parallel and are arranged on corresponding mounting bases of a cover plate 23 of the waste water tank 4. Pipeline filter 10 has three in parallel, sets up the side at pump farm body structure, and according to the needs of the all kinds of pipelines of rational arrangement, pipeline filter 10 specifically can set up the side at second return water pond 3.

The lower surface of the cover plate 23 for installing the slow-release scale inhibitor dosing device 13 and the NaOH dosing device 12 is provided with a slag trap 24 extending into the first water return tank 2 and the second water return tank 3, and the height of the slag trap 24 is 1-1.5 m, so that suspended matters in the return water are gathered at the slag trap 24 in a floating manner.

The cover plate 23 for installing the slow-release scale inhibitor dosing device 13 and the NaOH dosing device 12 is correspondingly provided with a dosing groove 25, the height of the dosing groove 25 is 200-400 mm, and the upper part of the dosing groove 25 is provided with a rain shelter.

In this embodiment, the spray water supply tank 1, the first return water tank 2, the second return water tank 3, the wastewater tank 4, the return water distribution channel 5, the cover plate 23, the mounting base, the slag trap 24, and the dosing groove 25 are all of a concrete structure, and the rain shed is of a concrete structure or a steel structure.

The bottoms of the first water return tank 2 and the second water return tank 3 are gradually shallow from the water inlet side to the water outlet side according to the gradient of 0.005-0.01. The design of slope is convenient for sink in the impurity collection of first return water pond 2 and 3 bottoms in second return water pond in the side of intaking, and then conveniently locate the side filter pump 7 pump-out of intaking the side.

Corresponding electric valves and manual valves are arranged on the water outlet branch pipe and the connecting pipeline of the spraying water supply pump 9; corresponding manual valves 22 are arranged on the water outlet branch pipes of the side filter pump 7 and the wastewater lifting pump 11; the water inlet pipeline of the bypass filter 8 is provided with a corresponding electric valve 21 and a corresponding manual valve 22; the water inlet pipeline, the water outlet pipeline and the connecting pipeline of the pipeline filter 10 are provided with corresponding manual valves 22; the water replenishing pipeline 14 and the water changing pipeline 26 are provided with corresponding electric valves 21 and manual valves 22. The types of electric valves 21 and manual valves 22 include, but are not limited to, butterfly valves, ball valves, gate valves. The electric valve 21 and the manual valve 22 are configured, and the on-off of the related medium can be realized in an automatic or manual control mode.

Spraying water supply tank 1, first return water pond 2, second return water pond 3 and wastewater disposal basin 4 and all being provided with corresponding level gauge 15 to corresponding numerical value shows through the display screen of the electric cabinet that is equipped with, as the monitoring of corresponding liquid level. Wherein, the level gauge 15 that sprays water supply tank 1 interlocks with the electric valve 21 of moisturizing pipeline 14, and when the liquid level that sprays water supply tank 1 was less than a certain liquid level of setting for, the electric valve 21 of moisturizing pipeline 14 opened in order to mend new water, and when the liquid level that sprays water supply tank 1 was higher than a certain liquid level of setting for, the electric valve 21 of moisturizing pipeline 14 closed. The level gauge 15 of wastewater disposal basin 4 is chain with waste water elevator pump 11, and when the liquid level of wastewater disposal basin 4 was higher than a certain liquid level of setting for, waste water elevator pump 11 started and carries out the drainage, and when the liquid level of wastewater disposal basin 4 was less than a certain liquid level of setting for, waste water elevator pump 11 closed.

On-site pressure gauges 16 are arranged on corresponding water outlet branch pipes of the spraying water supply pump 9, the side filter pump 7 and the wastewater lifting pump 11; the water outlet main pipe of the spraying water supply pump 9 is provided with a corresponding pressure gauge 17, a corresponding flow meter 18, a corresponding PH meter 19 and a corresponding temperature meter 19, and the water outlet main pipes of the side filter pump 7 and the wastewater lift pump 11 are provided with a corresponding pressure gauge 17 and a corresponding flow meter 18; a corresponding flowmeter 18 is arranged on the water replenishing pipeline 14; and the corresponding numerical value is displayed through a display screen of the electric cabinet and is used as the monitoring of the corresponding effluent index.

In this embodiment, the spray water supply tank 1 supplies water to the middle and lower parts of the spray tower for spraying, and the upper and top layers of the spray tower are communicated with the NaOH dosing device 12 and the external soft water pipe, so that under specific conditions, the upper part of the spray tower sprays alkali liquor and the top layer of the spray tower sprays accident cooling water. The NaOH dosing device 12 is respectively provided with a pressure gauge 17 and a flow meter 18 on pipelines communicated with the upper parts of the spray water supply tank 1 and the spray tower, and the pipelines are used for monitoring corresponding NaOH indexes.

The specific treatment process of the circulating water pump field comprises the following steps:

the water, alkali liquor and accident cooling water sprayed and used by the spray tower enter a water return distribution channel 5 through a water return pipe and enter a first water return pool 2 and a second water return pool 3 under the control of a manual gate valve 6; deposit and keep off 24 bars of slag trap through first return water pond 2, second return water pond 3 for impurity in the return water sinks in first return water pond 2, 3 bottoms in second return water pond, and the suspended solid floats and gathers in 24 departments of slag trap, and the return water passes through first return water pond 2, second return water pond 3 and sprays the trompil entering on the 1 partition wall in water supply tank and spray water supply tank 1, promotes to water supply house steward through spraying water supply pump 9, handles the back through pipe filter 10, carries to spray column and supplies water. Meanwhile, impurities sinking to the bottoms of the first water return tank 2 and the second water return tank 3 are gathered on the water inlet side through the gradients of the bottoms of the first water return tank 2 and the second water return tank 3, are lifted and conveyed to the bypass filter 8 through the bypass filter pump 7 for treatment, and water obtained after treatment is discharged into the spray water supply tank 1 through a water outlet pipeline of the bypass filter 8. In the treatment process, the pipeline filter 10 and the bypass filter 8 can carry out backwashing and sewage discharge automatically at regular time, and sewage enters the wastewater pool 4 through a sewage discharge pipeline and is discharged into a production wastewater pipe network through the wastewater lifting pump 11. Through various liquid level monitoring and water outlet index monitoring, the remote monitoring and unmanned guard of the circulating water pump field are realized.

Along with the operation of a circulating water pump field, when the quality of circulating water is continuously deteriorated, one of the manual gate valves 6 on the return water distribution channel 5 is closed through field operation, a channel for returning water to flow into a corresponding return water tank is cut off, the bypass filter pump 7 corresponding to the other return water tank is closed, meanwhile, the electric valve 21 of the water inlet pipeline of the bypass filter 8 is closed through remote control, the electric valve 21 of the water exchange pipeline 26 is opened (or the corresponding manual valve 22 is operated on the field), at the moment, the other return water tank is normally used, the circulating water supply of the blast furnace gas spraying system is not influenced, on the basis, the water stored in the return water tank cut off as the source of the returning water is discharged into a production waste water pipe network through the water exchange pipeline 26 through the bypass filter pump 7, and. After emptying, the cleaning pool is finished, the closed manual gate valve 6 is opened through field operation, the return water enters the return water pool again, meanwhile, the electric valve 21 of the water inlet pipeline of the bypass filter 8 is opened through remote control, the electric valve 21 of the water exchange pipeline 26 is closed, the electric valve 21 (or the corresponding manual valve 22 of the field operation) of the water supplement pipeline 14 is opened, after the liquid level of the return water pool to be emptied is recovered, the electric valve 21 of the water supplement pipeline 14 is closed, the cleaning pool and water exchange of the return water pool are finished, and the return water pool is put into operation. And cleaning and changing water for other water return pools according to the mode. The whole process does not affect the normal operation of the blast furnace gas spraying system.

The on-off of the backwater source of each backwater pool is independently controlled through the backwater distribution channel 5 and corresponding supporting facilities, so that when the water quality is deteriorated, the purpose of replacing the circulating water in the cleaning pool is realized under the condition that the normal operation of the blast furnace gas spraying system is not influenced, the water supply safety and the water supply quality of the blast furnace gas spraying system are finally improved, and the operation efficiency is improved.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.