Emergency water supply device for water pump

Abstract

The utility model relates to a steel smelting water supply system, in particular to a water pump emergency water supply device. The emergency water supply system is used for emergency by collecting waste water discharged by an existing water consumption equipment system, the water source problem of emergency water supply can be effectively solved, and meanwhile waste water can be recycled. The water pump emergency water supply device comprises a main pipeline from an alternating current water pump, and the main pipeline is respectively communicated with four parallel branch pipelines; the outlet of the main drainage pipe is divided into two paths, one path flows into the drainage port, and the other path is communicated with the inlet of the wastewater reservoir through a pipeline; an outlet of the wastewater reservoir is divided into two paths after being filtered by a first-stage filter, and one path is used as a turbid circulating water system and is communicated with a water inlet of the phosphorus removal machine through a pipeline; and the other path is used as a clean circulating water system and is respectively communicated with a rolling mill bearing cleaning machine, soft water side water softening treatment equipment and a cooling water suction tank after being filtered by a two-stage filter.

Description

Technical Field

[0001] The utility model relates to a water supply system for steel smelting, in particular to a water pump emergency water supply device. Background Art

[0002] In the process of steel smelting, the water supply system plays an important role. It not only needs to provide water for important equipment such as blast furnace cooling, converter cooling, continuous caster cooling, and sintering machine cooling, but also needs to provide a stable and reliable water source for processes such as sintering dust removal and blast furnace dust removal.

[0003] In actual steel plant production, if the production water supply suddenly stops, it will lead to production interruption, and the equipment will not be able to operate normally due to lack of water. It may also cause the equipment to overheat, be damaged or even scrapped; seriously affect the temperature control and impurity removal during the smelting process, and ultimately lead to a decline in product quality. In addition, for key equipment such as blast furnaces and converters in smelting production, they cannot be cooled normally due to lack of water, and equipment failures are likely to occur, bringing potential production safety hazards. Therefore, the production water supply in the steel plant must be kept uninterrupted.

[0004] In summary, when the production water supply is suddenly interrupted, how to achieve uninterrupted water supply and cooling for equipment such as blast furnaces is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] The utility model aims at the defects existing in the prior art and provides a water pump emergency interlocking water supply device. It solves the above problems by adding an emergency water supply system to the blast furnace equipment.

[0006] To achieve the above object, the utility model adopts the following technical solutions. The water pump emergency water supply device includes a main pipeline coming from an AC water pump, and the main pipeline is respectively connected and communicated with four parallel branch pipelines;

[0007] The first branch pipeline is connected and communicated with the water inlet of the descaling machine in the section steel cooling and descaling process, and a switch valve four is arranged on the connecting pipeline. The water outlet of the descaling machine is connected and communicated with the water inlet of the first sedimentation tank, and the water outlet of the first sedimentation tank is connected with the main drain pipe.

[0008] After the water of the second branch pipeline enters the rolling mill bearing cleaning machine in the water rolling mill bearing cleaning process, and a switch valve three is arranged on the connecting pipeline, it then flows into the main drain pipe through the second sedimentation tank.

[0009] The third branch pipeline is connected and communicated with the water inlet of the water softening treatment equipment on the soft water side in the production equipment cooling process, and a switch valve two is arranged on the connecting pipeline. The water outlet of the water softening treatment equipment on the soft water side is connected and communicated with the main drain pipe.

[0010] The fourth branch pipeline is connected to the cooling suction pool in the cooling process of the blast furnace blower, and a first switch valve is provided on the connecting pipeline. The water in the cooling suction pool flows into the main drainage pipe after being filtered by the cooling water filter.

[0011] The outlet of the main drainage pipe is divided into two paths. One path flows into the drainage outlet, and the other path is connected to the inlet of the waste water storage tank through a pipeline; after the outlet of the waste water storage tank is filtered by a first-stage filter, it is divided into two paths. One path is used as the turbid circulating water system and is connected to the inlet of the dephosphorization machine through a pipeline; the other path is used as the clean circulating water system and is respectively connected to the rolling mill bearing cleaning machine, the soft water side water softening treatment equipment, and the cooling suction pool after being filtered by a second-stage filter.

[0012] Further, the water in the clean circulating water system enters the emergency water tank through a make-up water pump, and the water in the emergency water tank flows into the second-stage filter.

[0013] Further, an emergency inlet valve is provided on the pipeline of the clean circulating water system between the make-up water pump and the first-stage filter, and an emergency outlet valve is provided on the pipeline of the clean circulating water system between the make-up water pump and the emergency water tank.

[0014] Further, a second liquid level sensor for detecting the liquid level is provided in the emergency water tank.

[0015] Further, the water flowing out of the second-stage filter is respectively connected to the rolling mill bearing cleaning machine, the soft water side water softening treatment equipment, and the cooling suction pool after being stabilized by a pressure stabilizing tank.

[0016] Further, an emergency water pump one is provided on the pipeline of the clean circulating water system between the second-stage filter and the pressure stabilizing tank, and a check valve and a second emergency valve are provided on the pipeline between the emergency water pump one and the pressure stabilizing tank.

[0017] Further, the water in the pipeline of the turbid circulating water system flows into the dephosphorization machine after passing through the emergency water pump two and the first emergency valve.

[0018] Further, a first liquid level sensor for detecting the liquid level height is provided in the waste water storage tank.

[0019] Further, a gate valve is provided before and after the AC water pump on the main pipeline.

[0020] Further, a second check valve is provided on the main pipeline.

[0021] The beneficial effects of the present utility model compared with the prior art.

[0022] The emergency water supply system of the present utility model can effectively solve the problem of the water source for emergency water supply and at the same time achieve the recycling of waste water by collecting and using the waste water discharged from the existing water use equipment system.

[0023] According to the requirements of emergency water - using equipment for water sources, the emergency water supply system of the present utility model is divided into two paths. To meet the requirements of different equipment for water source quality, it can effectively reduce the energy consumption and hardware loss in the secondary treatment of wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present utility model in conjunction with the drawings and specific embodiments. The protection scope of the present utility model is not limited only to the descriptions of the following content.

[0025] Figure 1 It is a schematic diagram of the overall water - pump emergency water supply device.

[0026] Figure 2 It is a schematic diagram of the cooling process of production equipment in the embodiment.

[0027] Figure 3 It is a schematic diagram of the cooling process of the blast furnace blower in the embodiment.

[0028] In the figure: 1. First gate valve; 2. AC water pump; 3. Second gate valve; 4. Two - stage filter; 5. First check valve; 6. Second emergency valve; 7. Second check valve; 8. Pressure - stabilizing tank; 9. First liquid - level sensor; 10. Emergency water inlet valve; 11. Make - up water pump; 12. Emergency water outlet valve; 13. Emergency water tank; 14. First emergency water pump; 15. Wastewater storage pool; 16. One - stage filter; 17. Drainage port; 18. Second liquid - level sensor; 19. Second emergency water pump; 20. First emergency valve; 21. First switch valve; 22. Second switch valve; 23. Third switch valve; 24. Fourth switch valve; 25. Fifth switch valve; 26. Cooling suction pool; 27. Cooling water filter; 28. Water softening treatment equipment; 29. Rolling mill bearing cleaning machine; 30. Second sedimentation tank; 31. Phosphorus removal machine; 32. First sedimentation tank; 33. Total drain pipe; 34. Blast furnace cooling tower; 35. Expansion tank; 36. First pump; 37. Second pump; 38. Blast furnace blower; 39. Cooling tower; 41. Post - suction - pool filter; 42. Third pump. SPECIFIC EMBODIMENTS

[0029] To make the objectives, technical solutions and beneficial effects of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0030] As Figure 1As shown in the figure, in Embodiment 1, the emergency water supply device for the water pump includes a main pipeline that comes from the AC water pump 2. A gate valve is provided before and after the AC water pump 2 on the main pipeline. A check valve II 7 is provided on the main pipeline. The main pipeline is respectively connected to four parallel branch pipelines. The main pipeline serves as the main artery of the entire water supply system, and it distributes the water flow transported from the AC water pump 2 to four different branch pipelines. A gate valve I 1, a gate valve II 3, and a check valve I 5 are provided on the main pipeline to control the direction and flow rate of the water flow and prevent the water from flowing back.

[0031] The first branch pipeline is connected to the water inlet of the descaling machine 31 in the section of the section steel cooling and descaling process, and a switching valve IV is provided on this connecting pipeline. The water outlet of the descaling machine 31 is connected to the water inlet of the first sedimentation tank 32, and the water outlet of the first sedimentation tank 32 is connected to the main drain pipe 33. After the water in the second branch pipeline enters the rolling mill bearing cleaning machine 29 in the process of cleaning the rolling mill bearings, and a switching valve III is provided on this connecting pipeline, it then flows into the main drain pipe 33 through the second sedimentation tank 30. The third branch pipeline is connected to the water inlet of the soft water side water softening treatment device 28 in the process of cooling the production equipment, and a switching valve II is provided on this connecting pipeline. The water outlet of the soft water side water softening treatment device 28 is connected to the main drain pipe 33. The fourth branch pipeline is connected to the cooling suction tank 26 in the process of cooling the blast furnace blower 38, and a switching valve I is provided on this connecting pipeline. The water in the cooling suction tank 26 flows into the main drain pipe 33 after being filtered by the cooling water filter 27.

[0032] In each branch pipeline: The first branch pipeline is responsible for providing water source for the section steel cooling and descaling process, and then the water flow will be discharged into the main drain pipe 33 after being treated by the first sedimentation tank 32.

[0033] The second branch pipeline provides clean water for cleaning the rolling mill bearings, and the used water is also discharged into the main drain pipe 33 after being treated by the second sedimentation tank 30.

[0034] Embodiment 2, the third branch pipeline: Supplies the softened water required for cooling the production equipment, and these waters are discharged after being treated by the soft water side water softening treatment device 28. The specific process in production is as Figure 2 shown. In the blast furnace process, it includes: a blast furnace cooling tower 34, an expansion tank 35, a pump, and a soft water side softening treatment device. Among them, the pump sends the circulating water to the top of the cooling tower. After being in contact with the air through spraying or packing materials for heat dissipation, the cooled water is pumped back to the blast furnace or other places that need to be cooled. The expansion tank 35 is connected to the highest point of the cooling system or near the suction side of the pump. When the water in the system expands or contracts due to temperature changes, the expansion tank 35 plays a buffering role to keep the system pressure stable. The softened water treated by the water treatment device is transported to other places through the pump.

[0035] Example 3, Fourth branch pipeline: It serves the cooling process of the blast furnace blower 38. The water provided first passes through the cooling suction pool 26, and then is discharged into the main drainage pipe 33 after being purified by the cooling water filter 27. The specific production process is as follows Figure 3 shown. For the cooling process of the blast furnace blower 38, there are the blast furnace blower 38, cooling tower, pump, suction pool, and filter. The overall working process is as follows

[0036] 1. Cooling water is pumped from the suction pool to the cooling system of the blast furnace blower 38 through a pump.

[0037] 2. In the blast furnace blower 38, the cooling water absorbs heat.

[0038] 3. Transported to the cooling tower: The heated circulating water is sent to the cooling tower.

[0039] 4. Cooling process: Inside the cooling tower, the circulating water comes into contact with air and cools down by evaporative heat dissipation.

[0040] 5. Return to the suction pool: The cooled water flows into the suction pool, preparing for the next cycle.

[0041] 6. Before the start of the cycle, the cooling water passes through a filter to remove impurities.

[0042] Repeat the cycle: The above steps are continuously repeated to ensure continuous and effective cooling of the blast furnace blower 38. This ensures that the blast furnace blower 38 can operate in the best state, and at the same time protects the equipment from overheating damage.

[0043] Example 4, The main drainage pipe 33 collects the wastewater treated by all branch pipelines, and then divides into two paths. One path is directly discharged, and the other path enters the wastewater storage pool 15 for storage before reuse. The wastewater storage pool 15 stores the preliminarily treated wastewater and further purifies it through filters of different levels. The purified water is divided into a turbidity circulating water system and a clean circulating water system, which are respectively supplied back to different process links. Specifically, the outlet of the main drainage pipe 33 divides into two paths. One path flows into the drainage port 17, and the other path is connected to the inlet of the wastewater storage pool 15 through a pipeline; after the outlet of the wastewater storage pool 15 is filtered by the first-stage filter 16, it divides into two paths. One path serves as the turbidity circulating water system and is connected to the inlet of the dephosphorization machine 31 through a pipeline; the other path serves as the clean circulating water system and is connected to the rolling mill bearing cleaning machine 29, the soft water side water softening treatment equipment 28, and the cooling suction pool 26 respectively after being filtered by the second-stage filter 4.

[0044] In the clean circulating water system: The water in the clean circulating water system enters the emergency water tank through the make-up water pump, and the water in the emergency water tank flows into the second-stage filter. An emergency inlet valve is provided on the pipeline of the clean circulating water system between the make-up water pump and the first-stage filter, and an emergency outlet valve is provided on the pipeline of the clean circulating water system between the make-up water pump and the emergency water tank. A second liquid level sensor for detecting the liquid level is provided in the emergency water tank. The water flowing out of the second-stage filter is stabilized by the pressure stabilizing tank and then connected to the mill bearing cleaning machine, the soft water side water softening treatment equipment, and the cooling suction pool respectively. The pressure stabilizing tank is used to ensure that the water flow to the subsequent equipment is stable and the pressure is appropriate. An emergency water pump I is provided on the pipeline of the clean circulating water system between the second-stage filter and the pressure stabilizing tank, and a check valve I and an emergency valve II are provided on the pipeline between the emergency water pump I and the pressure stabilizing tank.

[0045] In the turbid circulating water system: The water in the pipeline of the turbid circulating water system flows into the dephosphorizer after passing through the emergency water pump II and the emergency valve I. A first liquid level sensor for detecting the liquid level height is provided in the waste water storage tank. Among them, the liquid level sensors are installed in the waste water storage tank and the emergency water tank, and are used to monitor the water level in real time to ensure that there is no overflow or water shortage.

[0046] Working principle:

[0047] 1. During the operation of the steel plant equipment, the production water supply system is used to supply water sources to equipment such as blast furnaces and rolling mills to meet the usage requirements. The production water supply enters the water pump through the gate valve, is output from the water pump to the outlet gate valve, reaches the check valve after passing through the gate valve, and enters the corresponding water-using equipment (blast furnace blower cooling suction pool, soft water side water softening treatment equipment, rolling mill bearing cleaning machine, dephosphorizer) after passing through the check valve. Finally, the waste water is discharged to the drain outlet through the main drain pipe after passing through their respective water-using equipment.

[0048] 2. When abnormal conditions such as abnormal operation or maintenance of the workshop water supply equipment or power outage in the workshop occur, and it is necessary to start the emergency water supply system for equipment such as blast furnaces and rolling mills.

[0049] 3. A branch water pipe is branched at the outlet of the main drain pipe to discharge the waste water into the waste water storage tank through the switch valve. Under normal conditions, the waste water storage tank should ensure that the water in the waste water storage tank is full. If the water in the waste water storage tank is consumed, first ensure that the water in the waste water storage tank is full through the main drain pipe and then discharge it from the drain outlet. A liquid level sensor is provided on the waste water storage tank and is linked with the switch valve.

[0050] 4. Two water pipes are conveyed from the wastewater storage tank. One of them passes through the wastewater storage tank, the 1st-stage filter, the emergency water pump, and the emergency valve and then reaches the phosphorus remover, and then enters the main drain pipe through the first sedimentation tank (this is the emergency turbid circulating water system). The other water pipe passes through the 1st-stage filter to reach the emergency inlet valve, passes through the makeup water pump to reach the emergency outlet valve and then enters the emergency water tank. Under normal conditions, the emergency water tank should ensure that the water is full. If the water in the emergency water tank is consumed, first, the makeup water pump is used to replenish water from the wastewater storage tank. A liquid level detector is installed on the emergency water tank and is linked with the emergency makeup water pump.

[0051] 5. When emergency water sources are needed for equipment such as blast furnaces and rolling mills, start the emergency water pump. The water in the emergency water tank passes through the 2nd-stage filter to reach the emergency water pump, passes through the check valve to reach the second emergency valve, and then enters the switching valve one, switching valve two, and switching valve three after being stabilized by the pressure stabilizing tank and then enters the corresponding water-using equipment (the cooling suction tank of the blast furnace blower, the water softening treatment equipment on the soft water side, and the rolling mill bearing cleaning machine). After passing through their respective water-using equipment, the wastewater is finally discharged to the drain outlet through the main drain pipe (this is the emergency clean circulating water system).

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features therein; thus, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. An emergency water supply device for a water pump, comprising a main pipeline coming from an AC water pump (2), characterized in that: The main pipeline is respectively connected to four parallel branch pipelines; The first branch pipeline is connected to the water inlet of the dephosphorizer (31), the water outlet of the dephosphorizer (31) is connected to the water inlet of the first sedimentation tank (32), and the water outlet of the first sedimentation tank (32) is connected to the main drain pipe (33); After the water in the second branch pipeline enters the rolling mill bearing cleaning machine (29), it then flows into the main drain pipe (33) through the second sedimentation tank (30); The third branch pipeline is connected to the water inlet of the soft water side water softening treatment equipment (28), and the water outlet of the soft water side water softening treatment equipment (28) is connected to the main drain pipe (33); The fourth branch pipeline is connected to the cooling suction pool (26) therein, and the water in the cooling suction pool (26) flows into the main drain pipe (33) after being filtered by the cooling water filter (27); The outlet of the main drain pipe (33) is divided into two paths. One path flows into the drain port (17), and the other path is connected to the inlet of the waste water storage tank (15) through a pipeline; After the outlet of the waste water storage tank (15) is filtered by the first-stage filter (16), it is divided into two paths. One path is used as the turbid circulating water system and is connected to the water inlet of the dephosphorizer (31) through a pipeline; The other path is used as the clean circulating water system and is connected to the rolling mill bearing cleaning machine (29), the soft water side water softening treatment equipment (28), and the cooling suction pool (26) respectively after being filtered by the second-stage filter (4).

2. The water pump emergency water supply device according to claim 1, characterized in that: The water in the clean circulating water system enters the emergency water tank (13) through the make-up water pump (11), and the water in the emergency water tank (13) flows into the second-stage filter (4).

3. The water pump emergency water supply device according to claim 2, characterized in that: An emergency inlet valve (10) is provided on the pipeline of the clean circulating water system between the make-up water pump (11) and the first-stage filter (16), and an emergency outlet valve (12) is provided on the pipeline of the clean circulating water system between the make-up water pump (11) and the emergency water tank (13).

4. The water pump emergency water supply device according to claim 2, characterized in that: A liquid level sensor two (18) for detecting the liquid level is provided in the emergency water tank (13).

5. The water pump emergency water supply device according to claim 1, characterized in that: The water flowing out of the second-stage filter (4) is connected to the rolling mill bearing cleaning machine (29), the soft water side water softening treatment equipment (28), and the cooling suction pool (26) respectively after being stabilized by the pressure stabilizing tank (8).

6. The water pump emergency water supply device according to claim 5, characterized in that: An emergency water pump one (14) is provided on the pipeline of the clean circulating water system between the second-stage filter (4) and the pressure stabilizing tank (8), and a check valve one (5) and an emergency valve two (6) are provided on the pipeline between the emergency water pump one (14) and the pressure stabilizing tank (8).

7. The emergency water supply device for a water pump according to claim 1, characterized in that: The water in the pipeline of the turbid circulating water system flows into the dephosphorizer (31) after passing through the emergency water pump two (19) and the emergency valve one (20).

8. The emergency water supply device for a water pump according to claim 1, characterized in that: A liquid level sensor one (9) for detecting the liquid level height is provided in the waste water storage tank (15).

9. The emergency water supply device for a water pump according to claim 1, characterized in that: One gate valve is provided in front of and behind the AC water pump (2) on the main pipeline.

10. The water pump emergency water supply device according to claim 1, wherein: A check valve two (7) is provided on the main pipeline.

Images