Energy-saving sewage and wastewater recycling system

Abstract

The utility model relates to a kind of sewage and wastewater energy-saving recycling system, including refrigeration station circulating pool, sintering area new pool and multiple coal gas drainage pool, and the sedimentation tank, filter press and transfer tank are sequentially communicated, the refrigeration station circulating pool is communicated with sedimentation tank by refrigeration station drain pipe, refrigeration station drain pipe is equipped with refrigeration station drainage pump, still include coal gas total drainage pump and new water total pump, the outlet of coal gas total drainage pump is communicated with sedimentation tank by coal gas total drainage pipe, coal gas drainage pool is communicated with the import of coal gas total drainage pump by coal gas branch drainage pipe, coal gas branch drainage pipe is equipped with coal gas drainage valve, the import of new water total pump is communicated with transfer tank by new water total pipe, the outlet of new water total pump is communicated with sintering area new pool by sintering area new water pipe and sintering area new water pipe is equipped with sintering area new water valve on, the outlet of new water total pump is communicated with refrigeration station circulating pool by refrigeration station new water pipe and refrigeration station new water pipe is equipped with refrigeration station new water valve on.

Description

Technical Field

[0001] This utility model relates to the field of water recycling technology, specifically to an energy-saving recycling system for sewage and wastewater. Background Technology

[0002] The circulating water systems of the heat exchange and refrigeration stations in the ironmaking plant store circulating water in the refrigeration station's circulating water pool. When the water quality in the refrigeration station's circulating water pool exceeds standards, drainage and replacement are necessary. Especially in summer, the refrigeration station's cooling water is an open system with high evaporation rates, requiring substantial drainage and replacement. The current system design does not include wastewater treatment, resulting in large amounts of water being directly discharged into greenbelts, causing energy waste.

[0003] In addition, there are five gas drainage ponds in the sintering area of ​​the ironmaking plant. Suction trucks have been used to pump water out to the sewage pipe network on the south side of the iron casting workshop, resulting in energy waste and additional vehicle expenses.

[0004] In the sintering area of ​​the ironmaking plant, fresh water is used in the new water tank of the sintering zone to mix the materials. However, the cost of fresh water is high, resulting in energy waste. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing an energy-saving recycling system for sewage and wastewater, which recycles sewage and wastewater from the circulating water pool of the refrigeration station and the gas drainage pool, thereby improving the water utilization rate of the entire ironmaking plant.

[0006] This utility model is achieved through the following technical solution, providing a wastewater and sewage energy-saving recycling system, including a refrigeration station circulating water tank, a sintering zone fresh water tank, and multiple gas drainage tanks, as well as a sedimentation tank, a filter press, and a transfer tank connected in sequence. The refrigeration station circulating water tank is connected to the sedimentation tank through a refrigeration station drainage pipe, and the refrigeration station drainage pipe is equipped with a refrigeration station drainage pump that pumps water to the sedimentation tank. The system also includes a main gas drainage pump and a main fresh water pump. The outlet of the main gas drainage pump is connected to the sedimentation tank through a main gas drainage pipe, and the gas drainage tank is connected to the inlet of the main gas drainage pump through a gas branch drainage pipe, with a gas drainage valve installed on the gas branch drainage pipe. The inlet of the main fresh water pump is connected to the transfer tank through a main fresh water pipe, and the outlet of the main fresh water pump is connected to the sintering zone fresh water tank through a sintering zone fresh water pipe, with a sintering zone fresh water valve installed on the sintering zone fresh water pipe. The outlet of the main fresh water pump is connected to the refrigeration station circulating water tank through a refrigeration station fresh water pipe, with a refrigeration station fresh water valve installed on the refrigeration station fresh water pipe.

[0007] In this system, the refrigeration station drainage pump directs wastewater from the refrigeration station's circulating water tank into a sedimentation tank for settling. When the gas drainage tank needs to discharge wastewater, the corresponding gas drainage valve is opened, and the wastewater is discharged into the sedimentation tank via the main gas drainage pump for settling. The supernatant clear water after sedimentation flows into a filter press for filtration and then enters a transfer tank for temporary storage. When the sintering zone's new water tank needs water, the water from the transfer tank is pumped into the sintering zone's new water tank by opening the sintering zone's new water valve and main new water pump. When the refrigeration station's circulating water tank needs replenishment, the water from the transfer tank is pumped into the refrigeration station's circulating water tank by opening the refrigeration station's new water valve and main new water pump. As an optimization, a filter is installed on the drain pipe of the refrigeration station. Since the water in the circulating water tank of the refrigeration station is an open system, it is easy for impurities such as leaves to enter. The filter in this solution is used to filter out larger impurities such as leaves.

[0008] As an optimization, the filter includes a filter box, within which an inclined filter screen is fixedly installed. A partition extending downwards to the bottom of the filter box is fixedly connected to the lower end of the filter screen. The partition divides the filter box into a debris chamber and a clear water chamber located below the filter screen. The bottom of the filter box is connected to an outlet pipe located below the filter screen and an inlet pipe located above the filter screen. In this design, water flows from the inlet pipe to the filter screen. Through the separation by the filter screen, the water flows downwards and is discharged through the outlet pipe. Debris remains on the filter screen and flows downwards along the inclined surface to the debris chamber on the other side of the partition.

[0009] As an optimization, a switchable door is provided on the filter box on the side of the partition away from the filter screen. This switchable door allows the filtered debris to be removed when opened.

[0010] As an optimization, a refrigeration station return water pump is also included. The inlet of the refrigeration station return water pump is connected to the upper end of the sedimentation tank, and the outlet of the refrigeration station return water pump is connected to the refrigeration station circulating water pool. The water in the transfer tank is preferentially supplied to the new water pool in the sintering zone. When the water in the transfer tank is insufficient to supply the refrigeration station circulating water pool, since the refrigeration station circulating water pool has lower water quality requirements, the refrigeration station return water pump can be turned on to pump the clear water from the upper layer of the sedimentation tank into the refrigeration station circulating water pool.

[0011] As an optimization, five gas drainage tanks are provided to accommodate scenarios with five gas drainage tanks on site.

[0012] As an optimization, the inlet of the filter press is connected to the upper end of the sedimentation tank, thereby conveying the supernatant to the filter press.

[0013] The beneficial effects of this utility model are as follows: This utility model provides an energy-saving recycling system for wastewater and sewage. By organically integrating the circulating water pool of the refrigeration station, the new water pool of the sintering area, and multiple gas drainage pools within the ironmaking plant, and by setting up treatment units such as sedimentation tanks, filter presses, and transfer tanks, it achieves the effective collection, treatment, and reuse of various types of wastewater within the plant area, resulting in significant energy conservation, emission reduction, and economic benefits. This system can uniformly send wastewater discharged from the circulating water pool of the refrigeration station due to exceeding water quality standards, as well as wastewater from multiple gas drainage pools in the sintering area that previously relied on suction trucks for discharge, into a sedimentation tank for preliminary sedimentation treatment. After filtration by a filter press, the wastewater is temporarily stored in a transfer tank, thereby transforming the previously directly discharged or discharged wastewater into water resources that can be reused in production. The treated water is prioritized for use in the sintering zone's new water pool, which has high water quality requirements, replacing the previously consumed new water and significantly reducing the cost of new water usage. It can also serve as a makeup water source for the refrigeration station's circulating water pool. When the system's water supply is insufficient, the clear water from the sedimentation tank can be reused in the refrigeration station, which has relatively lower water quality requirements, achieving cascade utilization and closed-loop recycling of water resources. This system not only effectively solves the problems of energy waste, high vehicle discharge costs, and large new water consumption caused by the original drainage methods, but also significantly improves the overall water resource utilization efficiency of the entire plant. While reducing operating costs, it also provides reliable technical support for steel enterprises to achieve green and sustainable production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the filter of this utility model; As shown in the figure: 1. Refrigeration station circulating water tank; 2. Gas drainage tank; 3. Filter; 31. Filter box; 32. Filter screen; 33. Baffle; 34. Inlet pipe; 35. Outlet pipe; 36. Switch door; 4. Sedimentation tank; 5. Filter press; 6. Transfer tank; 7. New water tank in sintering zone; 8. Refrigeration station drainage pipe; 9. Refrigeration station drainage pump; 10. Refrigeration station return water pipe; 11. Refrigeration station return water pump; 12. Main gas drainage pipe; 13. Main gas drainage pump; 14. Gas branch drainage pipe; 15. Gas drainage valve; 16. Main new water pipe; 17. Main new water pump; 18. New water pipe in sintering zone; 19. New water valve in sintering zone; 20. New water pipe in refrigeration station; 21. New water valve in refrigeration station. Detailed Implementation

[0015] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0016] like Figures 1-2As shown, the present invention provides a wastewater and sewage energy-saving recycling system, which includes a refrigeration station circulating water tank 1, a sintering zone new water tank 7, and multiple gas drainage tanks 2, wherein there are 5 gas drainage tanks 2.

[0017] It also includes a sedimentation tank 4, a filter press 5, and a transfer tank 6 connected in sequence. The heights of the refrigeration station circulating water tank 1, the sintering zone new water tank 7, the sedimentation tank 4, the filter press 5, the transfer tank 6, and the five gas drainage tanks 2 are not limited. The inlet of the filter press 5 is connected to the upper end of the sedimentation tank 4, and the outlet of the filter press 5 is connected to the upper end of the transfer tank 6.

[0018] The lower end of the circulating water tank 1 of the refrigeration station is connected to the sedimentation tank 4 via a refrigeration station drain pipe 8. A refrigeration station drain pump 9 is installed on the refrigeration station drain pipe 8 to pump water into the sedimentation tank 4, and a filter 3 is installed on the refrigeration station drain pipe 8. Figure 2 As shown, the filter 3 includes a rectangular and sealed filter box 31. An inclined filter screen 32 is fixedly connected inside the filter box 31. A partition 33 extending downward to the bottom surface of the filter box 31 is fixedly connected to the lower end of the filter screen 32. The partition 33 divides the filter box 31 into a debris chamber and a clean water chamber located below the filter screen 32. The bottom surface of the filter box 31 is connected to an outlet pipe 35 located below the filter screen 32 and an inlet pipe 34 located above the filter screen 32. Water flows from the inlet pipe to the filter screen. Through the separation of the filter screen, the water flows downward and is discharged through the outlet pipe. Debris remains on the filter screen and flows downward along the inclined surface to the debris chamber on the other side of the partition.

[0019] The filter box 31 on the side of the partition 33 away from the filter screen 32 is provided with a switch door 36, which can remove the filtered debris when opened.

[0020] It also includes a gas main drainage pump 13 and a fresh water main pump 17. The outlet of the gas main drainage pump 13 is connected to the sedimentation tank 4 through the gas main drainage pipe 12. The gas drainage tank 2 is connected to the inlet of the gas main drainage pump 13 through the gas branch drainage pipe 14. The gas branch drainage pipe 14 is equipped with a gas drainage valve 15. The inlet of the fresh water main pump 17 is connected to the transfer tank through the fresh water main pipe 16. The outlet of the fresh water main pump 17 is connected to the sintering zone fresh water tank 7 through the sintering zone fresh water pipe 18, and the sintering zone fresh water pipe 18 is equipped with a sintering zone fresh water valve 19. The outlet of the fresh water main pump 17 is connected to the refrigeration station circulating water tank 1 through the refrigeration station fresh water pipe 20, and the refrigeration station fresh water pipe 20 is equipped with a refrigeration station fresh water valve 21.

[0021] It also includes a refrigeration station return water pump 11, the inlet of which is connected to the upper end of the sedimentation tank 4, and the outlet of which is connected to the refrigeration station circulating water tank 1.

[0022] How to use this utility model: In use, the refrigeration station drainage pump 9 filters the wastewater in the refrigeration station circulating water pool 1 through the filter 3 to remove larger impurities such as leaves, and then enters the sedimentation tank 4 for sedimentation. When the gas drainage pool 2 needs to discharge wastewater, the corresponding gas drainage valve 15 is opened, and the wastewater is discharged into the sedimentation tank 4 for sedimentation through the gas main drainage pump 13.

[0023] The clear water from the sedimentation tank 4 flows into the filter press 5 for filtration and then enters the transfer tank 6 for temporary storage. When the sintering zone's new water tank 7 needs water, the water from the transfer tank 6 is pumped into the sintering zone's new water tank 7 by opening the sintering zone's new water valve 19 and the main new water pump 17. When the refrigeration station's circulating water tank 1 needs replenishment, the water from the transfer tank 6 is pumped into the refrigeration station's circulating water tank 1 by opening the refrigeration station's new water valve 21 and the main new water pump 17.

[0024] Water from transfer pool 6 is preferentially supplied to new water pool 7 in sintering zone. When the water from transfer pool 6 is insufficient to supply circulating water pool 1 in refrigeration station, the clear water from the upper layer of sedimentation tank 4 can be pumped into circulating water pool 1 in refrigeration station since circulating water pool 1 has low water quality requirements.

[0025] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A wastewater and sewage energy-saving recycling system, comprising a refrigeration station circulating water tank (1), a sintering zone new water tank (7), and multiple gas drainage tanks (2), characterized in that: It also includes a sedimentation tank (4), a filter press (5), and a transfer tank (6) connected in sequence. The circulating water tank (1) of the refrigeration station is connected to the sedimentation tank (4) through the refrigeration station drain pipe (8). The refrigeration station drain pipe (8) is equipped with a refrigeration station drain pump (9) that pumps water to the sedimentation tank (4). It also includes a gas main drain pump (13) and a fresh water main pump (17). The outlet of the gas main drain pump (13) is connected to the sedimentation tank (4) through the gas main drain pipe (12). The gas drainage tank (2) is connected to the gas main drain pump (17) through the gas branch drain pipe (14). 3) The inlet is connected to the gas drainage pipe (14), which is equipped with a gas drainage valve (15). The inlet of the new water main pump (17) is connected to the transfer pool through the new water main pipe (16). The outlet of the new water main pump (17) is connected to the sintering zone new water pool (7) through the sintering zone new water pipe (18), which is equipped with a sintering zone new water valve (19). The outlet of the new water main pump (17) is connected to the refrigeration station circulating water pool (1) through the refrigeration station new water pipe (20), which is equipped with a refrigeration station new water valve (21).

2. The wastewater and sewage energy-saving recycling system according to claim 1, characterized in that: The refrigeration station drain pipe (8) is equipped with a filter (3).

3. The wastewater and sewage energy-saving recycling system according to claim 2, characterized in that: The filter (3) includes a filter box (31), in which an inclined filter screen (32) is fixedly connected. The lower end of the filter screen (32) is fixedly connected to a partition (33) extending downward to the bottom surface of the filter box (31). The partition (33) divides the filter box (31) into a debris chamber and a clear water chamber located below the filter screen (32). The bottom surface of the filter box (31) is connected to an outlet pipe (35) located below the filter screen (32) and an inlet pipe (34) located above the filter screen (32).

4. The wastewater and sewage energy-saving recycling system according to claim 3, characterized in that: The filter box (31) on the side of the partition (33) away from the filter screen (32) is provided with a switch door (36).

5. The wastewater and sewage energy-saving recycling system according to claim 1, characterized in that: It also includes a refrigeration station return water pump (11), the inlet of which is connected to the upper end of the sedimentation tank (4), and the outlet of which is connected to the refrigeration station circulating water tank (1).

6. The wastewater and sewage energy-saving recycling system according to claim 1, characterized in that: The gas drainage pool (2) has 5 units.

7. The wastewater and sewage energy-saving recycling system according to claim 1, characterized in that: The inlet of the filter press (5) is connected to the upper end of the sedimentation tank (4).

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