Organic wastewater open type zero discharge equipment
By designing an open zero-emission equipment for organic wastewater including multiple treatment steps, the problem of unsatisfactory COD wastewater treatment effect in the prior art is solved, and the effect of efficiently removing difficult-to-degrade organic pollutants and ammonia nitrogen is achieved.
Patent Information
- Application Number
- CN202420986701.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-05-09
AI Technical Summary
When treating COD wastewater, the treatment effect is not ideal and there are residues, making it difficult to effectively remove difficult-to-degrade organic pollutants.
An open zero-emission equipment for organic wastewater is designed, including water inlet tanks, physical and chemical sedimentation tanks, air float treatment equipment, biochemical treatment equipment and open evaporation equipment. The equipment gradually removes suspended substances, ammonia nitrogen and difficult-to-degrade organic pollutants in the sewage through multiple steps of physical and chemical precipitation, gas float, biochemical treatment and evaporation treatment.
The water after the pre-physical and chemical pretreatment and biochemical treatment is treated by an open evaporation device. The remaining COD in the water is trapped and attached to the surface of the evaporation screen, and is then completely oxidized and decomposed by microorganisms, achieving efficient treatment of COD wastewater, and plays a role in blowing off ammonia nitrogen during the evaporation process.
Smart Images
Figure CN222961269U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to an open zero-emission device for organic wastewater. Background Art
[0002] COD wastewater already accounts for a large part of industrial wastewater and contains a large amount of organic pollutants. According to different production types and processing methods, the components of organic pollutants are different. For example, high-concentration COD wastewater discharged by chemical enterprises contains many refractory organic pollutants, while food processing wastewater mainly contains organic pollutants such as fat, protein, and sugar, which are easily biodegradable by organisms. At present, for the treatment of COD wastewater, there are biodegradation methods, adsorption methods, photolysis methods, etc. However, these current treatment methods all have residues in the treatment process, and the treatment effect is not very satisfactory. Content of the Utility Model
[0003] The purpose of the utility model is to provide an open zero-emission device for organic wastewater to solve the problems raised in the above background art.
[0004] To achieve the above purpose, the utility model provides the following technical solution: an open zero-emission device for organic wastewater, including a water inlet tank and a physicochemical sedimentation tank. The physicochemical sedimentation tank is connected to the water inlet tank through a water pump. The output end of the physicochemical sedimentation tank is connected to a flotation treatment device through a water pump. The flotation treatment device is used to remove suspended insoluble impurities in the sewage. The output end of the flotation treatment device is connected to an intermediate water tank. The lower part of the intermediate water tank is connected to a biochemical treatment device through a water pump. The output end of the biochemical treatment device is connected to a secondary sedimentation tank through a pipeline. The overflow port at the upper part of the secondary sedimentation tank is connected to an open evaporation device through a pipeline. The evaporation device evaporates the pumped water and simultaneously plays a role in ammonia nitrogen stripping. The evaporation device includes a rectangular reaction tank and an evaporation tank. The evaporation tank is installed above the reaction tank and the upper port of the evaporation tank is open. An evaporation screen is installed in the evaporation tank. The evaporation screen is composed of a number of heat exchange tubes longitudinally and parallelly distributed. The heat exchange tubes are of U-shaped structure.
[0005] Preferably, the lower part of the physicochemical sedimentation tank is of a conical structure to collect the precipitated solid dirt.
[0006] Preferably, the reaction tank is sequentially partitioned to form an anaerobic fermentation area, an anoxic denitrification area, an aerobic digestion area, a sedimentation area, and a clear water area. The heat exchange tubes are connected to the bottom of the evaporation tank through a water pump.
[0007] Compared with the prior art, the beneficial effects of the present utility model are as follows: The clarified water after preliminary physical and chemical pretreatment and biochemical treatment passes through an open evaporation device. The residual COD in the water body is intercepted by the open evaporation equipment and adheres to the surface of the evaporation screen, and then is completely oxidized and decomposed by microorganisms into harmless residues and falls off. During the evaporation process, it plays the role of ammonia stripping, and has a good treatment effect on COD wastewater. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic structural diagram of the present utility model;
[0009] Figure 2 It is a schematic structural diagram of the evaporation equipment of the present utility model.
[0010] In the figure: 1, inlet water tank; 2, physical and chemical sedimentation tank; 3, air flotation treatment equipment; 4, intermediate water tank; 5, biochemical treatment equipment; 6, secondary sedimentation tank; 7, evaporation equipment; 701, reaction tank; 702, evaporation tank; 703, evaporation screen. SPECIFIC EMBODIMENTS
[0011] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0012] Please refer to Figure 1-2 , the present utility model provides a technical solution: an organic wastewater open zero-discharge device, including an inlet water tank 1 and a physical and chemical sedimentation tank 2. The lower part of the physical and chemical sedimentation tank 2 is of a conical structure for collecting precipitated solid pollutants. The physical and chemical sedimentation tank 2 is connected to the inlet water tank 1 through a water pump. The output end of the physical and chemical sedimentation tank 2 is connected to the air flotation treatment equipment 3 through a water pump. The air flotation treatment equipment 3 is used to remove suspended insoluble impurities in the sewage.
[0013] The output end of the air flotation treatment equipment 3 is connected to the intermediate water tank 4. The lower part of the intermediate water tank 4 is connected to a biochemical treatment equipment 5 through a water pump. The output end of the biochemical treatment equipment 5 is connected to the secondary sedimentation tank 6 through a pipeline. A water pump for flushing is connected between the input end of the secondary sedimentation tank 6 and the biochemical treatment equipment 5. The overflow port at the upper part of the secondary sedimentation tank 6 is connected to an open evaporation equipment 7 through a pipeline. The evaporation equipment 7 evaporates the pumped water and simultaneously plays the role of ammonia stripping.
[0014] The evaporation device 7 includes a rectangular reaction tank 701 and an evaporation tank 702. A sewage outlet is provided on the bottom side of the evaporation tank 702. The evaporation tank 702 is installed above the reaction tank 701 and the upper port of the evaporation tank 702 is open. An evaporation screen 703 is installed in the evaporation tank 702. The evaporation screen 703 is composed of a number of heat exchange tubes longitudinally and parallelly distributed. The heat exchange tubes are of a U-shaped structure. Two distribution boxes are provided on the side of the evaporation tank 702. The two ends of the heat exchange tubes are respectively communicated with the distribution boxes, and high-temperature steam for heating is connected. The reaction tank 701 is successively partitioned to form an anaerobic fermentation area, an anoxic denitrification area, an aerobic digestion area, a sedimentation area, and a clear water area. The upper part of the sedimentation area is communicated with the clear water area by means of overflow. The anaerobic fermentation area, the anoxic denitrification area, and the aerobic digestion area are successively connected by valves or pumps. The heat exchange tubes are connected to the bottom of the evaporation tank 702 through a water pump.
[0015] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An open zero-discharge device for organic wastewater, comprising a water inlet tank (1) and a physicochemical sedimentation tank (2), wherein the physicochemical sedimentation tank (2) is connected to the water inlet tank (1) via a water pump, characterized in that: The output end of the physicochemical sedimentation tank (2) is connected to the flotation treatment device (3) through a water pump. The flotation treatment device (3) is used to remove insoluble impurities suspended in the sewage. The output end of the flotation treatment device (3) is connected to the intermediate water tank (4). The lower part of the intermediate water tank (4) is connected to the biochemical treatment device (5) through a water pump. The output end of the biochemical treatment device (5) is connected to the secondary sedimentation tank (6) through a pipeline. The overflow port at the upper part of the secondary sedimentation tank (6) is connected to the open evaporation device through a pipeline. The evaporation device (7) evaporates the pumped water and simultaneously plays a role in stripping ammonia nitrogen. The evaporation device (7) comprises a rectangular reaction box (701) and an evaporation box (702). The evaporation box (702) is installed above the reaction box (701) and the upper port of the evaporation box (702) is open. An evaporation screen (703) is installed in the evaporation box (702). The evaporation screen (703) is composed of a plurality of heat exchange tubes distributed in parallel in the longitudinal direction. The heat exchange tubes are of a U-shaped structure.
2. The organic wastewater open zero-discharge equipment according to claim 1, characterized in that: The lower part of the physicochemical sedimentation tank (2) is a conical structure for collecting precipitated solid waste.
3. The organic wastewater open zero-discharge equipment according to claim 1, characterized in that: The reaction box (701) is sequentially divided into an anaerobic fermentation zone, an anoxic denitrification zone, an aerobic digestion zone, a sedimentation zone, and a clean water zone. The heat exchange pipe is connected to the bottom of the evaporation box (702) through a water pump.