Sintering plant wastewater cascade utilization zero discharge system

Abstract

The utility model relates to a waste water cascade utilization zero discharge system of a sintering plant. The waste water cascade utilization zero discharge system comprises a waste water sedimentation tank, a process adding water tank, a primary mixer, a secondary mixer, a wet dust removal system, a boiler system sewage discharge pipe, a circulating cooling water system sewage discharge pipe and a desulfurization waste water pipe, and a boiler system blow-off water pipe is connected to the wastewater sedimentation tank. A first bottom mud discharge pump is arranged in the wastewater sedimentation tank, and a water outlet pipe of the first bottom mud discharge pump is connected to a sewage adding pipe arranged in the primary mixer. And a sewage discharge pipe of the circulating cooling water system is connected to the wet dust removal system. And the wet dust removal system is connected to a sewage adding pipe of the primary mixer through a sewage discharging pipe. And the desulfurization wastewater pipe is connected to a process adding water tank and is connected to a second clear water adding pipe arranged in the secondary mixer through a process adding water pipe. Various kinds of waste water in the sintering plant are collected and pretreated in a classified mode, cascade utilization is achieved by combining the water quality characteristics, and finally the waste water serves as adding water of a sintering mixing machine to be reused, so that zero discharge of the waste water in the sintering plant is achieved.

Description

Technical Field

[0001] The utility model relates to a wastewater utilization device, in particular to a sintering plant wastewater cascade utilization zero-emission system, belonging to the technical field of resources and environment. Background Art

[0002] At present, sintering plants generate a large amount of different types of production wastewater during the production process, such as workshop floor washing water, equipment circulating cooling water system sewage, circulating cooling water system side filter backwash wastewater, waste heat power generation boiler system sewage, wet dust removal system sewage, initial rainwater in the plant area, steam pipe and heat exchange equipment condensate, flue gas desulfurization wastewater, etc. The wastewater discharge of sintering units not only increases the scale of the wastewater treatment station of the entire steel plant, but also increases the unit product water consumption of the sintering unit.

[0003] Therefore, there is an urgent need for a device that can treat or utilize the wastewater produced by the sintering unit, thereby reducing the wastewater discharge from the sintering plant. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned prior art, the utility model proposes a cascade utilization zero-emission system for sintering plant wastewater. The system collects and pre-treats various wastewaters such as boiler system wastewater, circulating cooling water system wastewater, desulfurization wastewater, etc. generated in the production process of the sintering plant, and realizes cascade utilization in combination with water quality characteristics, and finally reuses it as added water for the sintering primary mixer or secondary mixer, thereby reducing the unit product water consumption of the sintering plant and achieving near-zero discharge of wastewater in the sintering unit without adding wastewater treatment equipment.

[0005] According to the technical solution of the utility model, a sintering plant wastewater cascade utilization zero-emission system is provided.

[0006] A zero-emission system for cascade utilization of wastewater from a sintering plant, the system comprising a wastewater sedimentation tank, a process addition water tank, a primary mixer, a secondary mixer, a wet dust removal system, a boiler system sewage pipe, a circulating cooling water system sewage pipe, and a desulfurization wastewater pipe. Among them, a sewage addition pipe is provided in the primary mixer. A second clean water addition pipe is provided in the secondary mixer. The boiler system sewage pipe is connected to the wastewater sedimentation tank. A first sludge discharge pump is provided in the wastewater sedimentation tank, and the outlet pipe of the first sludge discharge pump is connected to the sewage addition pipe of the primary mixer. The circulating cooling water system sewage pipe is connected to the wet dust removal system. The wet dust removal system is connected to the sewage addition pipe of the primary mixer via the sewage pipe. The desulfurization wastewater pipe is connected to the process addition water tank. The process addition water tank is connected to the second clean water addition pipe of the secondary mixer through the process addition water pipe.

[0007] In the utility model, a first clean water adding pipe is also provided in the primary mixer, and the process adding water tank is respectively connected to the first clean water adding pipe and the second clean water adding pipe through the process adding water pipe.

[0008] Preferably, the circulating cooling water system sewage pipe is also connected to the first clean water addition pipe and / or the second clean water addition pipe.

[0009] In the utility model, a first supernatant liquid drainage pump is also provided in the wastewater sedimentation tank, and a water outlet pipe of the first supernatant liquid drainage pump is connected to the process addition water tank.

[0010] In the utility model, the system also includes a floor washing water collecting pipe. The floor washing water collecting pipe is connected to the wastewater sedimentation tank.

[0011] In the utility model, the system further comprises a primary rainwater collection pool. A second bottom mud discharge pump is arranged in the primary rainwater collection pool, and a water outlet pipe of the second bottom mud discharge pump is connected to a sewage adding pipe of the primary mixer.

[0012] In the utility model, a second supernatant liquid drainage pump is also provided in the primary rainwater collection tank, and a water outlet pipe of the second supernatant liquid drainage pump is connected to the process addition water tank.

[0013] In the utility model, the system also includes a circulating cold water tank, a circulating water pump, a side filter group, a cooled process equipment, a cooling tower, a steam condensing water pipe, a circulating cooling water pipe, and a filter water inlet pipe. Among them, the steam condensing water pipe is connected to the circulating cold water tank. The circulating cold water tank is connected to the circulating cooling water system sewage pipe, the circulating cooling water pipe, and the filter water inlet pipe through the circulating water pump. The circulating cooling water pipe is connected to the cooled process equipment. The cooled process equipment is connected to the cooling tower through a pipeline. The cooling tower is connected to the circulating cold water tank through a pipeline. The filter water inlet pipe is connected to the side filter group. The side filter group is connected to the circulating cold water tank through a pipeline. The backwash wastewater pipe drawn from the side filter group is connected to the wastewater sedimentation tank.

[0014] Preferably, flow meters are provided on the sewage pipe of the circulating cooling water system, the sewage addition pipe and the first clean water addition pipe of the primary mixer, and the second clean water addition pipe of the secondary mixer, respectively.

[0015] Preferably, a process addition water pump is provided on the process addition water pipe.

[0016] At present, a large amount of different types of production wastewater will be generated in the production process of sintering plants, such as workshop floor washing water, equipment circulating cooling water system sewage, circulating cooling water system side filter backwash wastewater, waste heat power generation boiler system sewage, wet dust removal system sewage, initial rainwater in the plant area, steam pipe and heat exchange equipment condensate, flue gas desulfurization wastewater, etc. The discharge of sintering unit wastewater not only increases the scale of the wastewater treatment station of the entire steel plant, but also increases the unit product water consumption of the sintering unit. In view of these problems, the utility model proposes a sintering plant wastewater cascade utilization zero emission system. The system classifies and collects various wastewaters such as boiler system sewage, circulating cooling water system sewage, desulfurization wastewater, etc. generated in the production process of the sintering plant, and pre-treats them, and realizes cascade utilization in combination with water quality characteristics, and finally reuses them as added water for the sintering primary mixer or secondary mixer, thereby reducing the unit product water consumption of the sintering plant and achieving near-zero emission of wastewater in the sintering unit without adding wastewater treatment equipment.

[0017] Specifically, the current sintering unit of a steel plant is mainly composed of a sintering main process system, a waste heat power generation system, and a flue gas purification system. The utility model collects and classifies the production wastewater generated in the three systems and performs necessary pretreatment before cascading utilization. Figure 1As shown, the non-pressurized floor washing water, boiler system sewage, and backwash wastewater of the bypass filter of the circulating cooling water system are collected through pipes or ditches to the wastewater sedimentation tank for solid-liquid separation, wherein the supernatant is transported by the first supernatant drainage pump set in the wastewater sedimentation tank to the process addition water tank for reuse as the mixer (i.e., the sintering primary mixer and / or secondary mixer) addition water, and the sludge wastewater is regularly lifted by the slurry pump (i.e., the first sludge discharge pump) to the primary mixer sewage addition pipe for reuse. After the initial rainwater is separated into solid and liquid in the initial rain collection tank, the supernatant is transported by the second supernatant drainage pump set in the initial rain collection tank to the process addition water tank for reuse as the addition water of the primary mixer and / or secondary mixer, and the sludge wastewater is regularly lifted by the slurry pump (i.e., the second sludge discharge pump) to the primary mixer sewage addition pipe for reuse. After the desulfurization wastewater is treated by the flue gas purification unit to meet the reuse standard, it is pumped to the process addition water tank for reuse as the addition water of the primary mixer and / or secondary mixer. The wastewater from the circulating cooling water system is sent to the circulating water pool of the wet dust removal system as the system supplementary water by the residual pressure of the circulating water pump. The continuous sewage pump of the system is sent to the sewage addition pipe of the primary mixer for reuse. The clean steam condensate is collected through the pipeline and flows to the circulating cold water pool of the circulating cooling water system for reuse as the system supplementary water. It can also be sent to the demineralized water tank of the waste heat power generation system for reuse as boiler supplementary water. Among them, two sets of water replenishment pipelines are set in the primary mixer to add sewage / wastewater and clean water respectively, and a set of clean water replenishment pipelines is set in the secondary mixer. Flow meters are respectively set on the sewage pipe of the circulating cooling water system, the sewage addition pipe of the primary mixer, the first clean water addition pipe of the primary mixer, and the second clean water addition pipe of the secondary mixer. The discharge of various production wastewaters is reasonably controlled according to the total water consumption of the mixer to achieve flow balance, and finally realize zero discharge of production wastewater of the sintering unit.

[0018] In the existing commonly used design schemes, filter backwash wastewater, boiler system sewage, and circulating cooling water system sewage are generally discharged directly to the whole plant production wastewater network, and steam condensate, especially steam condensate discharged from the pipeline steam trap, is directly discharged; the initial rainwater collection pool and wastewater sedimentation pool sludge need to be regularly cleared or dried by sludge treatment equipment; the utility model directly makes slurry in situ and then lifts it to the mixer sewage pipeline for reuse through a slurry pump, reducing the sludge disposal link. The existing wet dust removal system generally uses new production water for replenishment, which increases the total output of wastewater, resulting in the mixer being unable to absorb all the production wastewater generated in the unit. The utility model uses the circulating cooling water system sewage as the wet dust removal system replenishment water, thereby avoiding the problem that the mixer cannot absorb all the production wastewater generated in the unit due to the use of new production water as replenishment water in the prior art.

[0019] In the present invention, the wastewater from the circulating cooling water system is reused as the supplementary water for the wet dust removal system. If there is no wet dust removal system in the sintering unit, the wastewater from the circulating cooling water system can be directly reused in the clean water adding pipe of the primary mixer or the secondary mixer. In addition, only the wastewater adding pipe can be set in the primary mixer without the clean water adding pipe.

[0020] The utility model uses a wastewater sedimentation tank to separate the solid and liquid of the collected production wastewater, and the supernatant is reused for the addition of clean water to the mixer, and the bottom mud wastewater is periodically reused for the addition of sewage to the mixer. Whether the floor flushing water system is set up depends on the specific requirements of the project. The utility model uses a first rain collection tank to separate the solid and liquid of the collected initial rainwater, and the supernatant is reused for the addition of clean water to the mixer, and the bottom mud wastewater is periodically reused for the addition of sewage to the mixer. Whether this process is set up depends on the specific requirements of the project. In addition, the wastewater sedimentation tank and the first rain collection tank may not be equipped with a supernatant drainage pump, and the sewage may be directly reused to the mixer after being lifted by the bottom mud discharge pump.

[0021] In the utility model, the steam condensed water can be reused as boiler water, and can also be reused as supplementary water for the circulating cooling water system.

[0022] In the utility model, the outlet pipes of the supernatant drainage pumps in the primary rainwater collection tank and the wastewater sedimentation tank, the desulfurization wastewater pipe, and the circulating cooling water system sewage pipe are directly connected to the process water pipe, and can be directly connected in parallel with the process water pump by balancing the pressure of each pump. In addition, the process water system can also use the pressure of the external water supply network without the process water pump.

[0023] In this application, one or more circulating cooling water systems can be provided; one or more wet dust removal systems can be provided; and one or more initial rain collection pools can be provided. This application classifies and collects various wastewaters from the sintering plant, pre-treats them, reasonably controls the amount of water discharged from each section, and realizes cascade utilization according to the difference in water quality, and ultimately achieves zero discharge of wastewater within the sintering plant unit. Among them, the types of production wastewater can be increased or decreased according to the specific application of the sintering plant.

[0024] Compared with the prior art, the utility model has the following beneficial technical effects:

[0025] 1. The utility model classifies and collects various wastewaters such as boiler system sewage, circulating cooling water system sewage, desulfurization wastewater, etc. generated in the production process of the sintering plant, and pre-treats them, and realizes cascade utilization in combination with the water quality characteristics, and finally reuses them as added water for the sintering primary mixer or secondary mixer, thereby reducing the water consumption per unit product of the sintering plant and achieving near-zero discharge of wastewater in the sintering unit without adding wastewater treatment equipment.

[0026] 2. The utility model respectively arranges flow meters on the sewage pipe of the circulating cooling water system, the sewage adding pipe of the primary mixer, the first clean water adding pipe of the primary mixer, and the second clean water adding pipe of the secondary mixer. The discharge of various production wastewaters is reasonably controlled by the total water consumption of the mixer to achieve flow balance, and finally realize zero discharge of production wastewater of the sintering unit.

[0027] 3. The utility model directly makes slurry on-site from the bottom mud of the initial rainwater collection pool and the wastewater sedimentation pool, and then lifts it to the sewage pipeline of the mixer for reuse through a slurry pump, thereby reducing the sludge disposal process; and adopts the sewage discharged from the circulating cooling water system as the replenishing water for the wet dust removal system, thereby avoiding the problem in the prior art that the mixer cannot absorb all the production wastewater generated in the unit due to the use of new production water as replenishing water. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model is a structural schematic diagram of a zero-emission system for cascade utilization of sintering plant wastewater.

[0029] Reference numerals:

[0030] 1: Wastewater sedimentation tank; 2: Process water addition tank; 3: Primary mixer; 4: Secondary mixer; 5: First sludge discharge pump; 6: First supernatant drainage pump; 7: Initial rainwater collection tank; 8: Second sludge discharge pump; 9: Second supernatant drainage pump; 10: Wet dust removal system; 11: Circulating cold water tank; 12: Circulating water pump; 13: Side filter group; 14: Cooled process equipment; 15: Cooling tower; 16: Flow meter; 17: Process water addition pump;

[0031] L1: Boiler system sewage pipe; L2: Circulating cooling water system sewage pipe; L3: Desulfurization wastewater pipe; L4: Sewage addition pipe; L5: Second clean water addition pipe; L6: Process addition water pipe; L7: First clean water addition pipe; L8: Floor flushing water collection pipe; L9: Sewage pipe; L10: Steam condensate water pipe; L11: Circulating cooling water pipe; L12: Filter inlet pipe; L13: Backwash wastewater pipe. DETAILED DESCRIPTION

[0032] The technical solution of the utility model is illustrated below, and the scope of protection requested for the utility model includes but is not limited to the following embodiments.

[0033] According to the technical solution of the utility model, a sintering plant wastewater cascade utilization zero-emission system is provided.

[0034] A zero-emission system for cascade utilization of sintering plant wastewater, the system comprising a wastewater sedimentation tank 1, a process addition water tank 2, a primary mixer 3, a secondary mixer 4, a wet dust removal system 10, a boiler system sewage pipe L1, a circulating cooling water system sewage pipe L2, and a desulfurization wastewater pipe L3. Among them, a sewage addition pipe L4 is provided in the primary mixer 3. A second clean water addition pipe L5 is provided in the secondary mixer 4. The boiler system sewage pipe L1 is connected to the wastewater sedimentation tank 1. A first sludge discharge pump 5 is provided in the wastewater sedimentation tank 1, and the outlet pipe of the first sludge discharge pump 5 is connected to the sewage addition pipe L4 of the primary mixer 3. The circulating cooling water system sewage pipe L2 is connected to the wet dust removal system 10. The wet dust removal system 10 is connected to the sewage addition pipe L4 of the primary mixer 3 via a sewage discharge pipe L9. The desulfurization wastewater pipe L3 is connected to the process addition water tank 2. The process addition water tank 2 is connected to the second clean water addition pipe L5 of the secondary mixer 4 through the process addition water pipe L6.

[0035] In the present invention, a first clean water addition pipe L7 is further provided in the primary mixer 3. The process addition water tank 2 is connected to the first clean water addition pipe L7 and the second clean water addition pipe L5 through the process addition water pipe L6.

[0036] Preferably, the circulating cooling water system sewage pipe L2 is also connected to the first clean water addition pipe L7 and / or the second clean water addition pipe L5.

[0037] In the present invention, a first supernatant liquid drainage pump 6 is further provided in the wastewater sedimentation tank 1. The outlet pipe of the first supernatant liquid drainage pump 6 is connected to the process addition water tank 2.

[0038] In the present invention, the system further comprises a floor flushing water collecting pipe L8 . The floor flushing water collecting pipe L8 is connected to the wastewater sedimentation tank 1 .

[0039] In the present invention, the system further comprises a primary rainwater collection tank 7. A second bottom mud discharge pump 8 is arranged in the primary rainwater collection tank 7, and a water outlet pipe of the second bottom mud discharge pump 8 is connected to the sewage addition pipe L4 of the primary mixer 3.

[0040] In the utility model, a second supernatant liquid drainage pump 9 is further provided in the primary rainwater collection tank 7 , and a water outlet pipe of the second supernatant liquid drainage pump 9 is connected to the process addition water tank 2 .

[0041] In the utility model, the system also includes a circulating cold water tank 11, a circulating water pump 12, a side filter group 13, a cooled process equipment 14, a cooling tower 15, a steam condensation water pipe L10, a circulating cooling water pipe L11, and a filter water inlet pipe L12. Among them, the steam condensation water pipe L10 is connected to the circulating cold water tank 11. The circulating cold water tank 11 is connected to the circulating cooling water system sewage pipe L2, the circulating cooling water pipe L11, and the filter water inlet pipe L12 through the circulating water pump 12. The circulating cooling water pipe L11 is connected to the cooled process equipment 14. The cooled process equipment 14 is connected to the cooling tower 15 through a pipeline. The cooling tower 15 is connected to the circulating cold water tank 11 through a pipeline. The filter water inlet pipe L12 is connected to the side filter group 13. The side filter group 13 is connected to the circulating cold water tank 11 through a pipeline. The backwash wastewater pipe L13 drawn from the side filter group 13 is connected to the wastewater sedimentation tank 1.

[0042] Preferably, flow meters 16 are provided on the sewage pipe L2 of the circulating cooling water system, the sewage addition pipe L4 and the first clean water addition pipe L7 of the primary mixer 3, and the second clean water addition pipe L5 of the secondary mixer 4, respectively.

[0043] Preferably, a process addition water pump 17 is provided on the process addition water pipe L6. Example 1

[0044] like Figure 1 As shown, a zero-emission system for cascade utilization of sintering plant wastewater includes a wastewater sedimentation tank 1, a process addition water tank 2, a primary mixer 3, a secondary mixer 4, a wet dust removal system 10, a boiler system sewage pipe L1, a circulating cooling water system sewage pipe L2, and a desulfurization wastewater pipe L3. Among them, a sewage addition pipe L4 is provided in the primary mixer 3. A second clean water addition pipe L5 is provided in the secondary mixer 4. The boiler system sewage pipe L1 is connected to the wastewater sedimentation tank 1. A first sludge discharge pump 5 is provided in the wastewater sedimentation tank 1, and the outlet pipe of the first sludge discharge pump 5 is connected to the sewage addition pipe L4 of the primary mixer 3. The circulating cooling water system sewage pipe L2 is connected to the wet dust removal system 10. The wet dust removal system 10 is connected to the sewage addition pipe L4 of the primary mixer 3 via the sewage discharge pipe L9. The desulfurization wastewater pipe L3 is connected to the process addition water tank 2. The process addition water tank 2 is connected to the second clean water addition pipe L5 of the secondary mixer 4 through the process addition water pipe L6. Example 2

[0045] Example 1 is repeated, except that a first clean water addition pipe L7 is further provided in the primary mixer 3. The process addition water tank 2 is connected to the first clean water addition pipe L7 and the second clean water addition pipe L5 through the process addition water pipe L6. Example 3

[0046] Example 2 is repeated, except that the circulating cooling water system sewage pipe L2 is also connected to the first clean water addition pipe L7 of the primary mixer 3. Example 4

[0047] Example 2 is repeated, except that the circulating cooling water system sewage pipe L2 is also connected to the second clean water addition pipe L5 of the secondary mixer 4. Example 5

[0048] Example 2 is repeated, except that a first supernatant liquid drainage pump 6 is further provided in the wastewater sedimentation tank 1. The outlet pipe of the first supernatant liquid drainage pump 6 is connected to the process addition water tank 2. Example 6

[0049] Example 5 is repeated, except that the system further comprises a floor washing water collecting pipe L8 . The floor washing water collecting pipe L8 is connected to the wastewater sedimentation tank 1 . Example 7

[0050] Example 6 is repeated, except that the system further includes a primary rainwater collection tank 7. A second bottom mud discharge pump 8 is provided in the primary rainwater collection tank 7, and a water outlet pipe of the second bottom mud discharge pump 8 is connected to the sewage addition pipe L4 of the primary mixer 3. Example 8

[0051] Example 7 is repeated, except that a second supernatant liquid drainage pump 9 is further provided in the initial rainwater collection tank 7 , and the outlet pipe of the second supernatant liquid drainage pump 9 is connected to the process addition water tank 2 . Example 9

[0052] Example 8 is repeated, except that the system further includes a circulating cold water tank 11, a circulating water pump 12, a side filter group 13, a cooled process equipment 14, a cooling tower 15, a steam condensation water pipe L10, a circulating cooling water pipe L11, and a filter water inlet pipe L12. Among them, the steam condensation water pipe L10 is connected to the circulating cold water tank 11. The circulating cold water tank 11 is connected to the circulating cooling water system sewage pipe L2, the circulating cooling water pipe L11, and the filter water inlet pipe L12 through the circulating water pump 12. The circulating cooling water pipe L11 is connected to the cooled process equipment 14. The cooled process equipment 14 is connected to the cooling tower 15 through a pipeline. The cooling tower 15 is connected to the circulating cold water tank 11 through a pipeline. The filter water inlet pipe L12 is connected to the side filter group 13. The side filter group 13 is connected to the circulating cold water tank 11 through a pipeline. The backwash wastewater pipe L13 drawn from the side filter group 13 is connected to the wastewater sedimentation tank 1. Example 10

[0053] Example 9 is repeated, except that flow meters 16 are respectively provided on the sewage pipe L2 of the circulating cooling water system, the sewage addition pipe L4 and the first clean water addition pipe L7 of the primary mixer 3, and the second clean water addition pipe L5 of the secondary mixer 4. Embodiment 11

[0054] Example 10 is repeated, except that a process addition water pump 17 is provided on the process addition water pipe L6.

Claims

1. A zero-emission system for cascade utilization of sintering plant wastewater, Features: The system comprises a wastewater sedimentation tank (1), a process water addition tank (2), a primary mixer (3), a secondary mixer (4), a wet dust removal system (10), a boiler system sewage pipe (L1), a circulating cooling water system sewage pipe (L2), and a desulfurization wastewater pipe (L3); wherein the primary mixer (3) is provided with a sewage addition pipe (L4); the secondary mixer (4) is provided with a second clean water addition pipe (L5); the boiler system sewage pipe (L1) is connected to the wastewater sedimentation tank (1); the wastewater sedimentation tank (1) is provided with a first sludge discharge pipe (L6); A discharge pump (5) is provided, wherein the outlet pipe of the first sludge discharge pump (5) is connected to the sewage addition pipe (L4) of the primary mixer (3); the sewage discharge pipe (L2) of the circulating cooling water system is connected to the wet dust removal system (10); the wet dust removal system (10) is connected to the sewage addition pipe (L4) of the primary mixer (3) via the sewage discharge pipe (L9); the desulfurization wastewater pipe (L3) is connected to the process addition water tank (2); and the process addition water tank (2) is connected to the second clean water addition pipe (L5) of the secondary mixer (4) via the process addition water pipe (L6).

2. The system according to claim 1, Features: A first clean water addition pipe (L7) is also provided in the primary mixer (3); the process addition water pool (2) is connected to the first clean water addition pipe (L7) and the second clean water addition pipe (L5) respectively through the process addition water pipe (L6).

3. The system according to claim 2, Features: The circulating cooling water system sewage pipe (L2) is also connected to the first clean water addition pipe (L7) and / or the second clean water addition pipe (L5).

4. The system according to any one of claims 1 to 3, Features: A first supernatant liquid drainage pump (6) is also provided in the wastewater sedimentation tank (1); a water outlet pipe of the first supernatant liquid drainage pump (6) is connected to the process addition water tank (2).

5. The system according to any one of claims 1 to 4, Features: The system also includes a floor flushing water collection pipe (L8); the floor flushing water collection pipe (L8) is connected to the wastewater sedimentation tank (1).

6. The system according to any one of claims 1 to 5, Features: The system also includes a primary rain collection pool (7); a second sludge discharge pump (8) is provided in the primary rain collection pool (7); a water outlet pipe of the second sludge discharge pump (8) is connected to a sewage addition pipe (L4) of the primary mixer (3).

7. The system according to claim 6, Features: A second supernatant liquid drainage pump (9) is also provided in the primary rainwater collection pool (7), and a water outlet pipe of the second supernatant liquid drainage pump (9) is connected to the process addition water pool (2).

8. The system according to any one of claims 1 to 7, Features: The system further comprises a circulating cold water pool (11), a circulating water pump (12), a side filter group (13), a cooled process equipment (14), a cooling tower (15), a steam condensate pipe (L10), a circulating cooling water pipe (L11), and a filter water inlet pipe (L12); wherein the steam condensate pipe (L10) is connected to the circulating cold water pool (11); the circulating cold water pool (11) is connected to a circulating cooling water system sewage pipe (L2), a circulating cooling water pipe (L11), a filter water inlet pipe (L12) through a circulating water pump (12). The filter water inlet pipe (L12) is connected to the filter; the circulating cooling water pipe (L11) is connected to the cooled process equipment (14); the cooled process equipment (14) is connected to the cooling tower (15) through a pipeline; the cooling tower (15) is connected to the circulating cold water tank (11) through a pipeline; the filter water inlet pipe (L12) is connected to the bypass filter group (13); the bypass filter group (13) is connected to the circulating cold water tank (11) through a pipeline; the backwash wastewater pipe (L13) drawn from the bypass filter group (13) is connected to the wastewater sedimentation tank (1).

9. The system according to any one of claims 2 to 8, Features: Flow meters (16) are respectively provided on the sewage discharge pipe (L2) of the circulating cooling water system, the sewage addition pipe (L4) and the first clean water addition pipe (L7) of the primary mixer (3), and the second clean water addition pipe (L5) of the secondary mixer (4).

10. The system according to any one of claims 1 to 9, Features: The process water addition pipe (L6) is provided with a process water addition pump (17).

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