Sewage treatment device with multiple industrial wastewater pretreatment

Abstract

The utility model discloses a sewage treatment device with multiple industrial wastewater pretreatment, which comprises an emergency treatment tank, an adjusting tank, a hydrolysis acidification tank, a multifunctional tank and a sedimentation tank, the emergency treatment tank is used for collecting temporarily stored overproof or abnormal incoming water, so as to reduce the impact on a subsequent system; the regulating tank is used for regulating and controlling the flow of the sewage and balancing the water quality again; the hydrolysis acidification pool is used for carrying out hydrolysis acidification treatment on sewage, and the multifunctional pool is used for selecting a corresponding working mode according to the sewage treatment effect of the hydrolysis acidification pool and related characteristics of industrial sewage; the sedimentation tank is used for sludge sedimentation. According to the pretreatment device disclosed by the utility model, an integrated design is adopted, different functions are integrated in one set of system, the multiple functions can be adjusted, and the aims of realizing multiple purposes in one pool and saving the occupied area are fulfilled. According to the utility model, a plurality of treatment processes are combined and superposed, and can be freely switched among a plurality of working conditions according to the water quality characteristics of the inlet industrial wastewater, so that the process practicability is strong.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a wastewater treatment device with multiple industrial wastewater pretreatment functions. Background Technology

[0002] Industrial park wastewater is characterized by complex water quality, poor biodegradability, large fluctuations in water quality and quantity, high risk of influent exceeding standards, and high toxicity. Due to the differences in production processes and products of industrial enterprises, there is no fixed treatment technology that can be applied universally. Some key technical problems remain unsolved, and industrial wastewater treatment remains a global challenge.

[0003] The characteristics of industrial park wastewater present challenges in process selection. Traditionally, to ensure stable effluent compliance, the approach to industrial park wastewater treatment involves extending the treatment flow, reaction time, and increasing chemical dosage, based on conventional wastewater treatment processes. This traditional approach suffers from drawbacks such as high investment, large land area requirements, and high treatment costs. However, simplifying or omitting certain treatment facilities to reduce investment and land area risks ensuring stable effluent compliance. Therefore, finding a balance between economic viability and process stability is a key research direction in industrial wastewater treatment.

[0004] In existing technologies, industrial park wastewater treatment typically employs a process flow of "pretreatment + biological treatment + advanced treatment." The complex and difficult-to-biodegrade nature of industrial park wastewater means that conventional biological treatment methods have limited effectiveness. Therefore, pretreatment processes must be added to improve the biodegradability of industrial wastewater, reduce its toxicity, and minimize fluctuations in water quality and quantity. Thus, the selection of pretreatment processes is crucial for improving the biodegradability of industrial wastewater, reducing its toxicity, and stabilizing water quality and quantity fluctuations, directly determining the treatment effect of the biological system, the overall investment, and the operating costs of the project.

[0005] The pretreatment process for industrial park wastewater mainly includes: emergency treatment systems, water quality and quantity regulation systems, and enhanced primary treatment systems. For different types of industrial wastewater, and based on their varying water quality characteristics, the enhanced primary treatment system's process selection primarily includes: hydrolysis acidification, strong oxidation, and coagulation sedimentation. Due to the complexity and diversity of industrial park wastewater, enhanced primary treatment systems often employ a combination of multiple processes. Furthermore, wastewater treatment plants need to continuously adjust and optimize their processes based on actual influent conditions to achieve optimal economic and environmental benefits. This necessitates changes to the treatment processes when treating different types of wastewater, impacting treatment efficiency.

[0006] It is evident that the above-mentioned traditional processes have strong limitations and are not suitable for widespread application. In view of this situation, it is necessary to develop a multifunctional, adjustable, economically and environmentally efficient industrial wastewater pretreatment facility. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a sewage treatment device with multiple industrial wastewater pretreatment functions. It aims to solve the problem that the single treatment process in the existing technology cannot meet the needs of complex and varied industrial wastewater, and multiple processes are often required to be combined. However, when multiple processes are combined, the process flow is relatively complex, and corresponding adjustments and optimizations are required according to different wastewater characteristics, which affects the wastewater treatment efficiency.

[0008] This utility model is achieved through the following technical solution:

[0009] A wastewater treatment device with multiple industrial wastewater pretreatment functions includes an emergency treatment tank, an equalization tank, a hydrolysis acidification tank, a multi-functional tank, and a sedimentation tank.

[0010] The emergency treatment pool is equipped with a first water inlet and a first water outlet. The first water inlet is connected to an external pipe, and the first water outlet is connected to a regulating pool.

[0011] The regulating tank includes a second inlet, a third inlet, and a second outlet. The second inlet is connected to the first outlet, the third inlet is connected to an external pipeline, and the second outlet is connected to the hydrolysis acidification tank.

[0012] The hydrolysis acidification tank includes a fourth inlet and multiple third outlets. The fourth inlet is connected to the second outlet, and the multiple third outlets are connected to the multi-functional tank.

[0013] The multifunctional pool includes multiple fifth water inlets and a fourth water outlet. The multiple fifth water inlets are connected to the multiple third water outlets, and the fourth water outlet is connected to the sedimentation tank.

[0014] To optimize the above technical solution, the specific measures also include:

[0015] Furthermore, the emergency treatment tank, equalization tank, hydrolysis acidification tank, multifunctional tank, and sedimentation tank constitute the first working mode, and the equalization tank, hydrolysis acidification tank, multifunctional tank, and sedimentation tank constitute the second working mode.

[0016] Furthermore, a booster pump is installed between the emergency treatment pool and the regulating pool.

[0017] Furthermore, the hydrolysis acidification tank is provided with a first treatment unit and a second treatment unit connected in sequence. The inlet end of the first treatment unit is provided with a water distribution weir, and a water distribution area is provided between the first treatment unit and the fourth inlet.

[0018] Furthermore, the first processing unit includes two parallel first processing tanks, both of which are connected to the water distribution area; the second processing unit includes two parallel second processing tanks, each of which is connected to a corresponding first processing tank.

[0019] Furthermore, a partition wall is provided between the interconnected first and second treatment pools, and the partition wall is provided with through holes. The third drain outlet is provided on the side wall connecting the second treatment pool and the multi-functional pool. The corresponding through holes and the third drain outlet on the partition wall are staggered.

[0020] Furthermore, the hydrolysis acidification tank is equipped with a stirrer, and the bottom of the multifunctional tank is equipped with an aeration system. The multifunctional tank is equipped with a hydrolysis working mode, a strong oxidation working mode, and a mixed flocculation working mode.

[0021] Furthermore, the sedimentation tank and the first treatment unit in the hydrolysis acidification tank are connected by a sludge return pipe, and a sludge screw pump is installed on the sludge return pipe.

[0022] Furthermore, the sedimentation tank is equipped with a sludge scraper for discharging sludge.

[0023] The beneficial effects of this utility model are:

[0024] Compared to existing technologies, this utility model's multi-functional industrial wastewater pretreatment device combines multiple functions, including emergency wastewater storage, homogenization and quantity equalization, improvement of wastewater biodegradability, strong oxidation and chain scission, and coagulation and sedimentation. Furthermore, its integrated design combines different functions into a single system, with multiple functions adjustable, achieving multi-purpose use of a single tank and saving space.

[0025] The tank structure of this device, which includes a hydrolysis acidification tank, a multi-functional tank, and a sedimentation tank, allows the multi-functional tank to operate in multiple modes. In conjunction with the hydrolysis acidification tank and the sedimentation tank, when the multi-functional tank is in a coagulation, sedimentation, or strong oxidation state, it can share the sedimentation tank with the hydrolysis acidification tank, eliminating the need for a separate sedimentation system.

[0026] This invention combines and superimposes multiple treatment processes, and can be freely switched in various operating conditions according to the characteristics of the influent water quality of industrial wastewater. The process is highly practical, has a wide range of applications, and is highly reproducible. Attached Figure Description

[0027] Figure 1This is a flowchart of a wastewater treatment device with multiple industrial wastewater pretreatment functions according to this utility model.

[0028] Attached reference numerals: Emergency treatment tank 10, First inlet 11, First outlet 12, Equalization tank 20, Second inlet 21, Third inlet 22, Second outlet 23, Hydrolysis acidification tank 30, Fourth inlet 31, Third outlet 32, Isolation net 33, First treatment tank 34, Second treatment tank 35, Baffle plate 36, Through hole 361, Multifunctional tank 40, Fifth inlet 41, Fourth outlet 42, Sedimentation tank 50, Sludge scraper 51, Lifting pump 60, Sludge return pipe 70, Sludge screw pump 80. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Reference Figure 1 This embodiment provides a wastewater treatment device with multiple industrial wastewater pretreatment functions, including an emergency treatment tank 10, an equalization tank 20, a hydrolysis acidification tank 30, a multi-functional tank 40, and a sedimentation tank 50. The emergency treatment tank 10 is used to collect and temporarily store excessive or abnormal influent to reduce the impact on subsequent systems. The equalization tank 20 is used to regulate and control the flow rate of wastewater and to rebalance the water quality. The hydrolysis acidification tank 30 is used to perform hydrolysis acidification treatment on wastewater. The multi-functional tank 40 is used to select the corresponding working mode based on the treatment effect of the hydrolysis acidification tank 30 on wastewater and the relevant characteristics of industrial wastewater. The sedimentation tank 50 is used for sludge sedimentation.

[0032] Because industrial wastewater has a complex composition and there are significant differences between different types of industrial wastewater, in order to better balance water quality and enhance treatment effects, the emergency treatment tank 10, the equalization tank 20, the hydrolysis acidification tank 30, the multi-functional tank 40 and the sedimentation tank 50 constitute the first working mode, and the equalization tank 20, the hydrolysis acidification tank 30, the multi-functional tank 40 and the sedimentation tank 50 constitute the second working mode.

[0033] The emergency treatment pool 10 is provided with a first inlet 11 and a first outlet 12. The first inlet 11 is connected to an external pipeline, and the first outlet 12 is connected to the regulating pool. The regulating pool 20 includes a second inlet 21, a third inlet 22 and a second outlet 23. The second inlet 21 is connected to the first outlet 12, the third inlet 22 is connected to an external pipeline, and the second outlet 23 is connected to the hydrolysis acidification pool 30.

[0034] To maintain the efficiency of sewage flow, a booster pump is installed between the emergency treatment tank 10 and the equalization tank 20.

[0035] The equalization tank 20 will select an appropriate flow rate based on the total amount of sewage, the rate at which sewage flows into the equalization tank 20, and the sewage treatment efficiency of subsequent processes, and transport the sewage to the hydrolysis acidification tank 30. The hydrolysis acidification tank 30 includes a fourth inlet 31 and multiple third outlets 32. The fourth inlet 31 is connected to the second outlet 23, and the multiple third outlets 32 are connected to the multi-functional tank 40.

[0036] The hydrolysis acidification tank 30 contains a first treatment unit and a second treatment unit connected in sequence. A water distribution weir 33 is provided at the inlet end of the first treatment unit, and a water distribution zone is provided between the first treatment unit and the fourth inlet. The water distribution zone and the water distribution weir 33 can distribute water evenly. A stirring device is provided inside the hydrolysis acidification tank 30 to facilitate the distributed mixing and contact of wastewater and sludge, which is beneficial to the hydrolysis acidification reaction.

[0037] The first treatment unit includes two parallel first treatment tanks 34, both of which are connected to the water distribution area. The second treatment unit includes two parallel second treatment tanks 35, each connected to a corresponding first treatment tank 34. Hydrolysis and acidification are used to convert large, recalcitrant organic molecules into smaller molecules that are more readily utilized by subsequent aerobic or anaerobic microorganisms, thereby improving the biodegradability of the wastewater.

[0038] A partition wall 36 is provided between the interconnected first treatment tank 34 and second treatment tank 35. The partition wall 36 has through holes 361, and a third drain outlet 32 ​​is located on the side wall connecting the second treatment tank 35 and the multi-functional tank 40. The through holes 361 and the third drain outlet 32 ​​on the partition wall 36 are staggered. After passing through the distribution weir 33, the wastewater sequentially enters the first and second treatment units. The staggered through holes and the third drain outlet 32 ​​allow the wastewater to remain in the corresponding treatment unit for a longer time, resulting in a more complete reaction. The two sets of treatment tanks allow for simultaneous operation, improving wastewater treatment efficiency, and also enable alternating use for easier maintenance.

[0039] Wastewater treated in the hydrolysis acidification tank 30 enters the multi-functional tank 40. The multi-functional tank 40 includes multiple fifth inlets 41 and a fourth outlet 42. The multiple fifth inlets 41 are connected to multiple third outlets 32, and the fourth outlet 42 is connected to the sedimentation tank 50. An aeration system is installed at the bottom of the multi-functional tank 40. The multi-functional tank 40 is equipped with a hydrolysis working mode, a strong oxidation working mode, and a mixed flocculation working mode, which can be adjusted according to the relevant indicators of the wastewater treated in the first treatment tank 34 and the second treatment tank 35.

[0040] Multi-functional pool mode selection:

[0041] Hydrolysis mode:

[0042] The wastewater in the equalization tank is tested for relevant indicators. When the wastewater has good biodegradability, the multi-functional tank selects the hydrolysis mode to continuously degrade the wastewater and form small molecule substances.

[0043] Strong oxidation mode:

[0044] The wastewater in the equalization tank is tested for relevant indicators. When the wastewater has poor biodegradability, the multi-functional tank is set to a strong oxidation mode. The aeration system inside the multi-functional tank is activated to act as a stirrer, ensuring that the wastewater and chemicals are evenly mixed. Simultaneously, a strong oxidizing agent is added to the multi-functional tank during the strong oxidation mode to enhance the oxidation effect. Strong oxidizing agents include one or more combinations of hydrogen peroxide-based oxidants, ozone, Fenton's reagent, and perchlorate.

[0045] Mixed flocculation mode:

[0046] The wastewater in the equalization tank is tested for relevant indicators. If the influent contains a large amount of heavy metal ions, the multi-functional tank is set to mixed flocculation mode. A mixed flocculant is added to the multi-functional tank for mixed flocculation, and then the wastewater enters the sedimentation tank to remove heavy metals. The mixed flocculant includes one or more combinations of aluminum salts, iron salts, polyacrylamide, and biopolymer flocculants.

[0047] Wastewater treated in the multi-functional tank 40 enters the sedimentation tank 50 for sludge settling. A sludge scraper is installed inside the sedimentation tank 50 to remove the sludge. The sedimentation tank 50 is connected to the first treatment unit in the hydrolysis acidification tank 30 via a sludge return pipe 70. A sludge screw pump 80 is installed on the sludge return pipe 70 to replenish the amount of sludge in the hydrolysis acidification tank 30, maintain the activity of the sludge, and ensure continuous and high hydrolysis efficiency.

[0048] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A wastewater treatment device with multiple industrial wastewater pretreatment functions, characterized in that: It includes an emergency treatment tank, a regulating tank, a hydrolysis acidification tank, a multi-functional tank, and a sedimentation tank; The emergency treatment pool is equipped with a first water inlet and a first water outlet. The first water inlet is connected to an external pipeline, and the first water outlet is connected to a regulating pool. The regulating tank includes a second inlet, a third inlet, and a second outlet. The second inlet is connected to the first outlet, the third inlet is connected to an external pipeline, and the second outlet is connected to the hydrolysis acidification tank. The hydrolysis acidification tank includes a fourth inlet and multiple third outlets. The fourth inlet is connected to the second outlet, and the multiple third outlets are connected to the multi-functional tank. The multifunctional pool includes multiple fifth water inlets and a fourth water outlet. The multiple fifth water inlets are connected to the multiple third water outlets, and the fourth water outlet is connected to the sedimentation tank.

2. The wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 1, characterized in that: The emergency treatment tank, equalization tank, hydrolysis acidification tank, multifunctional tank, and sedimentation tank constitute the first working mode, and the equalization tank, hydrolysis acidification tank, multifunctional tank, and sedimentation tank constitute the second working mode.

3. A wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 2, characterized in that: A booster pump is installed between the emergency treatment pool and the regulating pool.

4. A wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 3, characterized in that: The hydrolysis acidification tank is provided with a first treatment unit and a second treatment unit connected in sequence. The water inlet end of the first treatment unit is provided with a water distribution weir, and a water distribution area is provided between the first treatment unit and the fourth water inlet.

5. A wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 4, characterized in that: The first processing unit includes two parallel first processing tanks, both of which are connected to the water distribution area. The second processing unit includes two parallel second processing tanks, each of which is connected to a corresponding first processing tank.

6. A wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 5, characterized in that: A partition wall is provided between the first and second treatment pools that are interconnected. The partition wall has through holes. The third drain outlet is located on the side wall connecting the second treatment pool and the multi-functional pool. The corresponding through holes and the third drain outlet on the partition wall are staggered.

7. A wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 6, characterized in that: The hydrolysis acidification tank is equipped with a stirrer, and the bottom of the multifunctional tank is equipped with an aeration system. The multifunctional tank is equipped with a hydrolysis working mode, a strong oxidation working mode, and a mixed flocculation working mode.

8. A wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 7, characterized in that: The sedimentation tank and the first treatment unit in the hydrolysis acidification tank are connected by a sludge return pipe, and a sludge screw pump is installed on the sludge return pipe.

9. A wastewater treatment device with multiple industrial wastewater pretreatment functions according to claim 1, characterized in that: The sedimentation tank is equipped with a sludge scraper for discharging sludge.

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