Hazardous waste wastewater pretreatment device
By designing a pretreatment device for hazardous wastewater in a multi-effect evaporation system, using the combination of a single evaporation reactor and a backwash valve, the deposition problem of scaling substances on the pipeline is solved, extending the equipment life and improving operating efficiency.
Patent Information
- Application Number
- CN202421994263.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-08-16
AI Technical Summary
In the existing multi-effect evaporation system, due to the complex composition of wastewater, the substances easily scaled and salt deposition on the pipeline, resulting in a decrease in blockage and heat transfer effect, affecting the equipment life and production capacity.
A pretreatment device for hazardous waste water is designed, including a single steam reactor and a backwash valve. By increasing the position of the reactor and thickening the discharge pipeline, pretreatment is performed using height drop and steam heating to reduce the entry of the scalable substance into the multi-effect evaporator.
Effectively reduce multi-effect evaporator pipeline blockage, extend equipment maintenance frequency, improve operational efficiency, and reduce maintenance costs.
Smart Images
Figure CN223304274U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wastewater treatment, in particular to a hazardous waste wastewater pretreatment device. Background Art
[0002] Currently, industrial wastewater and landfill leachate are primarily treated using multiple-effect evaporation equipment. However, due to the wastewater's complex composition and high salt content, precipitates form during the evaporation process. These precipitates adhere to the evaporator's walls, leading to scaling and salt crystallization that adheres to the pipes, reducing thermal storage efficiency. This can ultimately cause equipment blockage and significantly reduce heat transfer, severely impacting equipment life and production capacity. Effective pretreatment—pre-processing substances in the wastewater that are prone to scaling and salt precipitation to prevent them from entering the evaporation system—is currently the most effective way to maintain evaporation systems and extend equipment life. Utility Model Content
[0003] The technical problem to be solved by the utility model is: how to effectively alleviate the problems of pipe blockage and scaling in a multi-effect evaporation system, and thus provides a hazardous waste and wastewater pretreatment device that is easy to clean.
[0004] To achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:
[0005] A hazardous waste and wastewater pretreatment device comprises a single distillation reactor, the bottom of which is arranged on a support frame via a reactor bracket, and support legs are arranged at both ends of the support frame, which is arranged on a ground foundation via the support legs;
[0006] The bottom discharge port of the single distillation reactor is connected to the concentrate discharge pipe, the bottom of the concentrate discharge pipe is connected to the concentrate receiving tank, and the concentrate receiving tank is placed on the ground foundation; and a concentrate discharge switch is provided on the concentrate discharge pipe.
[0007] The height of the ground foundation is 2-3 meters.
[0008] The concentrate discharge switch is a backwash valve.
[0009] Compared with the existing technology, the utility model has the following beneficial effects: the utility model reduces the entry of scaling substances in the wastewater into the multiple-effect evaporator by pre-treating hazardous waste wastewater, extends the maintenance frequency of the multiple-effect evaporation system, avoids frequent manual disassembly and cleaning of pipelines, and effectively improves the operating efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a diagram of the pre-processing equipment of this utility model patent;
[0011] Figure 2 This is a flow chart of the application of this patented pretreatment equipment in the production process. DETAILED DESCRIPTION
[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0013] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0014] like Figure 1 、 Figure 2 As shown, a hazardous waste wastewater pretreatment device includes a single distillation reactor 1. The bottom of the single distillation reactor 1 is set on a support frame 3 through a reactor bracket 2. Support legs 4 are set at both ends of the support frame 3, and the support legs 4 are set on a ground foundation 5.
[0015] The bottom discharge port of the single distillation reactor 1 is connected to a concentrate discharge pipe 6, the bottom of which is connected to a concentrate receiving tank 7 for collecting the concentrate. The concentrate receiving tank 7 is placed on the ground foundation 5, and a concentrate discharge switch 8 is installed on the concentrate discharge pipe 6.
[0016] Furthermore, the height of the ground foundation 5 is 2-3 meters.
[0017] Furthermore, the concentrate discharge switch 8 is a backwash valve.
[0018] It should be noted that the steam outlet of the single-steam reactor 1 is connected to a steam pipe, and the steam pipe can directly lead to the multiple-effect evaporator.
[0019] The working principle of the present invention is as follows: the present invention uses a fixed structure to raise the single distillation reactor 1 so that it is about 2-3 meters above the ground.
[0020] The discharge port at the bottom of the single-distillation reactor 1 is enlarged to facilitate the collection of concentrated liquid from the reactor using the height difference, and a concentrated liquid discharge pipe 6 is installed at the bottom of the single-distillation reactor 1.
[0021] After being heated by steam and evaporated in the evaporation chamber, the evaporated material enters the multi-effect equipment again. During the heating and evaporation process of the single steam reactor 1, when the concentrated liquid reaches a certain concentration or crystallizes after evaporation, it is discharged through the discharge switch 8 through the discharge pipe 6 at the bottom (the diameter of this pipe can be designed in different sizes according to the requirements of the on-site equipment) to the viscous high-salt material collection box of the concentrate receiving tank 7.
[0022] like Figure 2 As shown, hazardous wastewater and leachate wastewater enter the sedimentation tank and feed tank in sequence, then enter the pretreatment device of the utility model through a water pump. There, they are heated and evaporated, and the evaporated water is then treated in a multi-effect heater. Finally, the evaporated steam is transported to the condenser, cooled by circulating cooling water, and converted into condensed water that meets the expected water quality before being discharged into the reuse water tank.
[0023] The beneficial effects of this utility model are as follows: the pretreatment device elevates the single-effect steam reactor 1 via a platform to a certain height above the ground. After the material enters the single-effect steam reactor 1, steam is introduced into the reactor's interlayer to heat and evaporate the material. A valve with backwashing capability is installed at the bottom of the reactor, and the pipes are thickened to facilitate concentrated discharge. After the material is initially evaporated, it enters the multi-effect evaporator, which can greatly reduce the blockage of the multi-effect evaporator's tubes, improve the operating efficiency of the multi-effect evaporator equipment, and reduce maintenance costs.
[0024] The utility model discharges the concentrate in advance in the single-distillation reactor 1, and the concentrated liquid after discharge enters the triple-effect evaporation equipment, which greatly reduces the crystallized viscous material entering the triple-effect equipment, thereby reducing the blockage of the multi-effect evaporation equipment pipeline and effectively improving the operation efficiency of the multi-effect evaporation equipment.
[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.
Claims
1. A hazardous waste wastewater pretreatment device, characterized by: The single-distillation reactor (1) comprises a bottom portion of the single-distillation reactor (1) being arranged on a support frame (3) via a reactor bracket (2); support legs (4) being arranged at both ends of the support frame (3), and the support frame (3) being arranged on a ground foundation (5) via the support legs (4); The bottom discharge port of the single steam reactor (1) is connected to a concentrate discharge pipe (6), the bottom of the concentrate discharge pipe (6) is connected to a concentrate receiving tank (7), and the concentrate receiving tank (7) is placed on a ground foundation (5); and a concentrate discharge switch (8) is provided on the concentrate discharge pipe (6).
2. A hazardous waste wastewater pretreatment device according to claim 1, characterized in that: The height of the ground foundation (5) is 2-3 meters.
3. The hazardous waste wastewater pretreatment device according to claim 1, characterized in that: The concentrate discharge switch (8) is a backwash valve.