Combined pretreatment device for sewage and wastewater

Abstract

The utility model relates to a combined pretreatment device for sewage and wastewater, which comprises a regulating tank, an ROS aeration tank, a reaction tank, a biochemical tank and a friction polarization scale inhibitor, when the sewage and wastewater are aerated in the ROS aeration tank, the ROS aeration tank can release a large amount of active oxygen into the sewage and wastewater, and the active oxygen can be in contact with organic pollutants to generate oxidation-reduction reaction, so that the sewage and wastewater are subjected to oxidation-reduction reaction; according to the utility model, organic pollutants can be degraded into carbon dioxide and water, macromolecular organic pollutants which are difficult to degrade can also be decomposed into micromolecular organic pollutants, water clusters are polarized in cooperation with a friction polarization scale inhibitor, so that the water clusters are subjected to certain positive and negative charge separation, and the water clusters can surround scale molecular clusters through an anisotropic charge adsorption principle; the membrane bioreactor provided by the invention can effectively reduce the organic load of inlet water of the membrane bioreactor, reduce the formation of scale in wastewater, reduce the frequency of membrane pollution of the membrane bioreactor and prolong the service life of the membrane bioreactor, thereby saving the operation cost.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater pretreatment, in particular to a sewage and wastewater combined pretreatment device. Background Art

[0002] MBR (membrane bioreactor) is a new type of sewage treatment process that combines membrane separation technology with biological treatment technology. MBR introduces the membrane separation process in the sewage treatment process, and uses membrane structures with different pore sizes to filter pollutants of different particle sizes to separate impurities in sewage. The wastewater in MBR first combines with activated sludge under oxygen supply conditions for biochemical reactions, and then leaves activated sludge, microorganisms and impurities through the filtration of the membrane. The active microorganisms stay in the bioreactor, and the hydraulic retention time and sludge retention time can be effectively controlled respectively, reducing the loss of active microorganisms during the treatment process, thereby maintaining the concentration of activated sludge in the reactor.

[0003] MBR has the following advantages: (1) The membrane components can separate macromolecular compounds and microorganisms, and the effluent water quality is good and can be directly reused; (2) It has a high volumetric load and strong impact resistance; (3) It can directly separate mud and water, omitting the step of the secondary sedimentation tank, occupying a small area and saving costs; (4) It has a strong modular feature, is easy to operate, and is easy to automate. MBR has been widely used to treat various types of polluted wastewater due to its high treatment efficiency, strong impact resistance, small footprint, flexible layout, and no space restrictions.

[0004] Wastewater needs to be pretreated before entering the MBR to enhance the biodegradability of wastewater and improve its degradation efficiency in the MBR. However, the existing pretreated wastewater still contains a large amount of macromolecular substances, which are easily collected on the surface of the MBR membrane components. Macromolecular substances with similar pore sizes will block the membrane pores, reducing the filtration efficiency and service life. At the same time, scale in the wastewater, that is, calcium and magnesium ions form insoluble calcium carbonate and magnesium hydroxide crystals attached to the surface of the membrane component, will also reduce the membrane flux and affect the service life of the membrane component, thereby affecting the degradation efficiency of the MBR for wastewater, increasing energy consumption, and requiring regular maintenance and replacement of membrane components during use, with high operating costs. Utility Model Content

[0005] Based on this, it is necessary to provide a combined pretreatment device for sewage and wastewater.

[0006] The utility model solves the above technical problems with the following technical solutions: a sewage and wastewater combined pretreatment device, comprising: a regulating tank, a ROS aeration tank, a reaction tank, a biochemical tank and a friction polarization scale inhibitor;

[0007] The first end of the regulating tank is connected to the first end of the ROS aeration tank, the second end of the ROS aeration tank is connected to the first end of the reaction tank, the second end of the reaction tank is connected to the first end of the biochemical tank, and the second end of the biochemical tank is connected to the friction polarization scale inhibitor.

[0008] In one embodiment, the sewage and wastewater combined pretreatment device further comprises: a grid well, wherein the grid well is connected to the second end of the regulating tank.

[0009] In one embodiment, the sewage and wastewater combined pretreatment device further includes: an intermediate tank, a first end of the intermediate tank is connected to a first end of the ROS aeration tank, and a second end of the intermediate tank is connected to a first end of the reaction tank.

[0010] In one embodiment, the sewage and wastewater combined pretreatment device further includes: a sedimentation tank, wherein a first end of the sedimentation tank is connected to a second end of the reaction tank, and a second end of the sedimentation tank is connected to a first end of the biochemical tank.

[0011] In one embodiment, the ROS aeration tank comprises: an aeration tank body, an aeration pump and a ROS microporous aeration membrane. The aeration tank body is provided with an aeration cavity. The aeration pump and the ROS microporous aeration membrane are arranged in the aeration cavity with upper and lower intervals. The ROS microporous aeration membrane is located above the aeration pump.

[0012] In one embodiment, the ROS aeration tank further comprises: an ultrasonic generator, wherein the ultrasonic generator is disposed on a side wall of the aeration chamber.

[0013] In one embodiment, the friction polarization scale inhibitor includes: a shell and a plurality of polarization chips, the shell having a scale inhibition chamber, the polarization chips being arranged in sequence and staggered with each other in the scale inhibition chamber, a first protrusion being arranged on the first surface of each polarization chip, and a second protrusion being arranged on the second surface of each polarization chip.

[0014] In one embodiment, the sewage and wastewater combined pretreatment device further includes: a first delivery pump and a first delivery pipe, and the ROS aeration tank is connected to the reaction tank through the first delivery pump and the first delivery pipe.

[0015] In one embodiment, the sewage and wastewater combined pretreatment device further includes: a second delivery pump and a second delivery pipe, and the reaction pool is connected to the biochemical pool through the second delivery pump and the second delivery pipe.

[0016] In one embodiment, the sewage and wastewater combined pretreatment device further includes: a third delivery pump and a third delivery pipe, and the biochemical pool is connected to the friction polarization scale inhibitor through the third delivery pump and the third delivery pipe.

[0017] The beneficial effects of the utility model are as follows: the utility model provides a sewage and wastewater combined pretreatment device, which is provided with a regulating tank, a ROS aeration tank, a reaction tank, a biochemical tank and a friction polarization scale inhibitor that are connected in sequence. When the sewage and wastewater are aerated in the ROS aeration tank, the ROS aeration tank can release a large amount of active oxygen into the sewage and wastewater, which can react with organic pollutants to produce an oxidation-reduction reaction, degrading the organic pollutants into carbon dioxide and water, and can also decompose large-molecule organic pollutants that are difficult to degrade into small-molecule organic pollutants, and can effectively degrade organic matter in the sewage and wastewater, and cooperate with the friction polarization scale inhibitor to The water clusters are polarized, so that a certain separation of positive and negative charges occurs in the water clusters, so that one end of the water cluster is positively charged and the other end is negatively charged. The polarized water clusters can surround the scale molecule clusters through the principle of opposite charge adsorption, thereby blocking the accumulation of scale molecule clusters and having a good scale inhibition effect. In this way, the organic load of the membrane bioreactor influent can be effectively reduced, the biodegradability of the sewage and wastewater can be enhanced, the formation of scale in the sewage and wastewater can be reduced, and the frequency of membrane fouling in the membrane bioreactor can be reduced, thereby improving the degradation efficiency and service life of the membrane bioreactor for sewage and wastewater and saving operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic structural diagram of a sewage and wastewater combined pretreatment device according to an embodiment.

[0020] In the attached drawings, 10 is a combined pretreatment device for sewage and wastewater; 100 is a grille well; 200 is a regulating tank; 300 is a ROS aeration tank; 400 is an intermediate tank; 500 is a reaction tank; 600 is a sedimentation tank; 700 is a biochemical tank; and 800 is a friction polarization scale inhibitor. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0022] It should be understood that the same or similar numbers in the drawings of the embodiments correspond to the same or similar parts. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] In one embodiment, Figure 1 As shown, a combined pretreatment device 10 for sewage and wastewater includes: a regulating tank 200, a ROS aeration tank 300, a reaction tank 500, a biochemical tank 700 and a friction polarization scale inhibitor 800; the first end of the regulating tank 200 is connected to the first end of the ROS aeration tank 300, the second end of the ROS aeration tank 300 is connected to the first end of the reaction tank 500, the second end of the reaction tank 500 is connected to the first end of the biochemical tank 700, and the second end of the biochemical tank 700 is connected to the friction polarization scale inhibitor 800.

[0024] In this embodiment, the regulating tank 200, the ROS aeration tank 300, the reaction tank 500, the biochemical tank 700 and the friction polarization scale inhibitor 800 are connected in sequence, and the sewage is treated accordingly in the regulating tank 200, the ROS aeration tank 300, the reaction tank 500, the biochemical tank 700 and the friction polarization scale inhibitor 800 in sequence. When the sewage is aerated in the ROS aeration tank 300, the ROS aeration tank 300 can release a large amount of active oxygen into the sewage, which can react with organic pollutants to produce redox reactions, degrading the organic pollutants into carbon dioxide and water, and can also decompose large molecular organic pollutants that are difficult to degrade into small molecular organic pollutants, which can effectively reduce The organic matter in the sewage is polarized by the friction polarization scale inhibitor 800, so that the water clusters undergo a certain separation of positive and negative charges, with one end of the water cluster carrying a positive charge and the other end carrying a negative charge. The polarized water clusters can surround the scale molecule clusters through the principle of opposite charge adsorption, thereby blocking the accumulation of scale molecule clusters and having a good scale inhibition effect. In this way, the organic load of the membrane bioreactor influent can be effectively reduced, the biodegradability of the sewage is enhanced, the formation of scale in the sewage is reduced, and the frequency of membrane fouling in the membrane bioreactor can be reduced, thereby improving the degradation efficiency and service life of the membrane bioreactor for sewage and saving operating costs.

[0025] It is worth noting that the sewage is initially precipitated in the regulating tank 200, which can precipitate and separate some particulate pollutants and adjust the water quality of the sewage. The sewage is chemically treated in the reaction tank 500, that is, by adjusting the pH value of the sewage and adding reaction agents, the heavy metals, oils, chroma and other difficult-to-degrade organic and inorganic substances in the sewage are removed. The sewage is biologically treated in the biochemical tank 700, for example, by placing activated sludge in the biochemical tank 700, the organic matter in the sewage is biochemically degraded to reduce the organic concentration and biological toxicity of the sewage. In this way, the sewage is pretreated in multiple steps to enhance its biodegradability, which is beneficial to subsequent degradation.

[0026] In one embodiment, Figure 1 As shown, the sewage and wastewater combined pretreatment device 10 further includes: a grid well 100, and the grid well 100 is connected to the second end of the regulating tank 200. Specifically, after the sewage and wastewater pass through the grid well 100, large solid particles and suspended matter in the sewage and wastewater can be intercepted and removed, the water quality of the sewage and wastewater can be preliminarily adjusted, the pipeline blockage can be avoided, and the normal operation of the subsequent treatment facilities can be ensured.

[0027] In one embodiment, Figure 1 As shown, the sewage and wastewater combined pretreatment device 10 further includes: an intermediate tank 400, wherein a first end of the intermediate tank 400 is connected to a first end of the ROS aeration tank 300, and a second end of the intermediate tank 400 is connected to a first end of the reaction tank 500. Specifically, the intermediate tank 400 plays a role in storing and regulating the water flow of the intermediate process in the sewage and wastewater pretreatment. The sewage and wastewater is transported to the intermediate tank 400 after aeration in the ROS aeration tank 300, and the sewage and wastewater after aeration treatment can be stored, which is conducive to the flocculation and precipitation of particles and colloids in the sewage and wastewater, and can precipitate and separate particles and colloids in the sewage and wastewater, so as to facilitate the subsequent treatment of the sewage and wastewater in the reaction tank 500.

[0028] In one embodiment, Figure 1 As shown, the sewage and wastewater combined pretreatment device 10 further includes: a sedimentation tank 600, wherein the first end of the sedimentation tank 600 is connected to the second end of the reaction tank 500, and the second end of the sedimentation tank 600 is connected to the first end of the biochemical tank 700. Specifically, the intermediate tank 400 plays a role in removing suspended matter and particulate matter in the water to purify the water quality during the sewage and wastewater pretreatment. After the sewage and wastewater is treated in the reaction tank 500, it is transported to the sedimentation tank 600, and the precipitate generated by the sewage and wastewater reaction can be settled and separated, which can purify the water quality and facilitate the subsequent biochemical tank 700 to perform biochemical treatment on the sewage and wastewater.

[0029] In one embodiment, the ROS aeration tank 300 includes: an aeration tank body, an aeration pump and a ROS microporous aeration membrane, an aeration chamber is provided on the aeration tank body, the aeration pump and the ROS microporous aeration membrane are arranged in the aeration chamber with upper and lower intervals, and the ROS microporous aeration membrane is located above the aeration pump. Specifically, the aeration pump is arranged on the bottom side wall of the aeration chamber, and the ROS microporous aeration membrane is an active oxygen purification membrane, which is made of PE (polyethylene, polyethylene) material, has a high membrane porosity, has a large specific surface area, low aeration resistance, near-zero pore deformation, acid and alkali resistance and high salt resistance. When water or air flows through the ROS microporous aeration membrane, it can produce bubbles with smaller particle size, a larger bubble density per unit volume, and can be distributed more evenly, with a high mass transfer coefficient, higher oxygen transmission efficiency and lower energy consumption. Under the action of the ROS microporous aeration membrane, active oxygen is generated due to piezoelectric catalysis, that is, when water or air flows through the ROS microporous aeration membrane, the pressure causes a piezoelectric catalytic effect in the ROS microporous aeration membrane, and the ROS microporous aeration membrane is in an unbalanced heterogeneous charge state, thereby releasing active oxygen into the sewage and wastewater. There are a large number of highly active free radicals on the bubbles, which can undergo redox reactions when in contact with organic pollutants, and can directly degrade organic pollutants into carbon dioxide and water. It can also decompose difficult-to-degrade large-molecule organic pollutants into small-molecule organic pollutants, and can effectively degrade organic matter in sewage and wastewater.

[0030] In one embodiment, the ROS aeration tank 300 further includes: an ultrasonic generator, which is arranged on the side wall of the aeration chamber. Specifically, the ultrasonic generator is arranged on the side wall of the aeration chamber, and the ultrasonic generator can irradiate the wastewater with high-frequency ultrasonic waves, and can generate a certain number of cavitation bubbles in the wastewater. The cavitation bubbles will form a local high-temperature and high-pressure environment at the moment of breaking, and generate highly active free radicals with a high concentration in a local area, accompanied by strong shock waves and high-speed jets. In this way, the mechanical effect of ultrasonic waves, high-temperature thermal decomposition and free radical oxidation can decompose the difficult-to-degrade macromolecular organic pollutants into small molecular organic pollutants, and can further effectively degrade the organic matter in the wastewater.

[0031] In this embodiment, a large number of bubbles generated by the ROS microporous aeration membrane can further enhance the ultrasonic cavitation effect of the ultrasound, further increase the concentration of hydroxyl radicals in the wastewater, and greatly improve its strong oxidizing property. The explosion of the increased ultrasonic cavitation bubbles can break up the suspended tiny particle pollutants in the wastewater. For example, the mixed system formed by carbon powder and oil pollution can promote the separation of oil pollution and carbon and other particles, thereby making the oil pollution float, greatly reducing the oil content in the wastewater, and reducing the COD (Chemical Oxygen Demand) value of the wastewater. Hydroxyl radicals can also perform preliminary oxidation on difficult-to-degrade organic matter, and can well pretreat the organic matter in the wastewater, thereby increasing the dissolved oxygen content and bioavailability, and improving the water quality stability.

[0032] In one embodiment, the friction polarization scale inhibitor 800 includes: a shell and a plurality of polarization chips, the shell having a scale inhibition chamber, the polarization chips being arranged in sequence and staggered with each other in the scale inhibition chamber, a first protrusion being arranged on the first surface of each polarization chip, and a second protrusion being arranged on the second surface of each polarization chip. Specifically, along the direction of the central axis of the scale inhibition chamber, the polarization chips are arranged in sequence and staggered with each other, one side of each polarization chip is connected to the side wall of the scale inhibition chamber, and there is a gap between the other side of each polarization chip and the side wall of the scale inhibition chamber. The polarization chip, the first protrusion and the second protrusion are made of polytetrafluoroethylene or perfluoroethylene propylene copolymer. When the sewage passes through the friction polarization scale inhibitor 800, the friction with the polarization chip causes the water clusters to be polarized, which can change the state of ions in the sewage, thereby preventing the formation of scale. That is, by polarizing the water clusters, a certain positive and negative charge separation occurs in the water clusters, so that one end of the water cluster has a positive charge and the other end has a negative charge. The polarized water clusters can surround the CaCO3 molecular clusters through the principle of opposite charge adsorption, thereby blocking the accumulation of CaCO3 molecular clusters, having a good scale inhibition effect, and can reduce the blockage or rupture of the membrane components of the membrane bioreactor due to scale, extend the cleaning cycle and service life of the membrane components, and reduce operating costs. At the same time, by providing the first convex column and the second convex column, the resistance to water passing through can be increased, which is beneficial to further increase the friction strength between the sewage and waste water and the polarization chip, and can better polarize the sewage and waste water.

[0033] In one embodiment, the sewage and wastewater combined pretreatment device 10 further includes: a first delivery pump and a first delivery pipe, and the ROS aeration tank 300 is connected to the reaction tank 500 through the first delivery pump and the first delivery pipe. Specifically, the first delivery pipe includes: a first delivery branch pipe and a second delivery branch pipe, the first end of the first delivery branch pipe is connected to the first end of the ROS aeration tank 300, the second end of the first delivery branch pipe is connected to the input end of the first delivery pump, the output end of the first delivery pump is connected to the first end of the second delivery branch pipe, and the second end of the second delivery branch pipe is connected to the first end of the reaction tank 500, so that the sewage and wastewater in the ROS aeration tank 300 can be delivered to the reaction tank 500. Correspondingly, the sewage and wastewater combined pretreatment device 10 further includes: a second delivery pump and a second delivery pipe, the reaction tank 500 is connected to the biochemical tank 700 through the second delivery pump and the second delivery pipe, and the sewage and wastewater combined pretreatment device 10 further includes: a third delivery pump and a third delivery pipe, the biochemical tank 700 is connected to the friction polarization scale inhibitor 800 through the third delivery pump and the third delivery pipe, and the sewage and wastewater can be delivered to the biochemical tank 700 and the friction polarization scale inhibitor 800. It is worth noting that the delivery of sewage and wastewater between the grid well 100, the regulating tank 200, the ROS aeration tank 300, the intermediate tank 400, the reaction tank 500, the sedimentation tank 600, the biochemical tank 700 and the friction polarization scale inhibitor 800 can be achieved by means of a delivery pump and a delivery pipe, and in this embodiment, no redundant description is given.

[0034] Compared with the prior art, the utility model has at least the following advantages:

[0035] The utility model provides a sewage and wastewater combined pretreatment device, which is provided with a regulating tank, a ROS aeration tank, a reaction tank, a biochemical tank and a friction polarization scale inhibitor which are connected in sequence. When the sewage and wastewater are aerated in the ROS aeration tank, the ROS aeration tank can release a large amount of active oxygen into the sewage and wastewater, which can react with organic pollutants to produce an oxidation-reduction reaction, degrading the organic pollutants into carbon dioxide and water, and can also decompose large-molecule organic pollutants that are difficult to degrade into small-molecule organic pollutants, and can effectively degrade organic matter in the sewage and wastewater, and cooperate with the friction polarization scale inhibitor to polarize water clusters. Polarization causes a certain separation of positive and negative charges in water clusters, so that one end of the water cluster is positively charged and the other end is negatively charged. The polarized water clusters can surround the scale molecule clusters through the principle of opposite charge adsorption, thereby blocking the accumulation of scale molecule clusters and having a good scale inhibition effect. In this way, the organic load of the membrane bioreactor influent can be effectively reduced, the biodegradability of sewage and wastewater can be enhanced, the formation of scale in sewage and wastewater can be reduced, and the frequency of membrane fouling in the membrane bioreactor can be reduced, thereby improving the degradation efficiency and service life of the membrane bioreactor for sewage and wastewater and saving operating costs.

[0036] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A combined pretreatment device for sewage and wastewater, characterized in that: include: Regulating tank, ROS aeration tank, reaction tank, biochemical tank and friction polarization scale inhibitor; The first end of the regulating tank is connected to the first end of the ROS aeration tank, the second end of the ROS aeration tank is connected to the first end of the reaction tank, the second end of the reaction tank is connected to the first end of the biochemical tank, and the second end of the biochemical tank is connected to the friction polarization scale inhibitor.

2. The sewage and wastewater combined pretreatment device according to claim 1 is characterized in that: Also includes: A grid well is connected to the second end of the regulating tank.

3. The sewage and wastewater combined pretreatment device according to claim 2 is characterized in that: Also includes: An intermediate tank, wherein a first end of the intermediate tank is connected to a first end of the ROS aeration tank, and a second end of the intermediate tank is connected to a first end of the reaction tank.

4. The sewage and wastewater combined pretreatment device according to claim 3 is characterized in that: Also includes: A sedimentation tank, wherein the first end of the sedimentation tank is connected to the second end of the reaction tank, and the second end of the sedimentation tank is connected to the first end of the biochemical tank.

5. The sewage and wastewater combined pretreatment device according to claim 1 is characterized in that: The ROS aeration tank comprises: an aeration tank body, an aeration pump and a ROS microporous aeration membrane. The aeration tank body is provided with an aeration cavity. The aeration pump and the ROS microporous aeration membrane are arranged in the aeration cavity with upper and lower intervals. The ROS microporous aeration membrane is located above the aeration pump.

6. The sewage and wastewater combined pretreatment device according to claim 5 is characterized in that: The ROS aeration tank further comprises: an ultrasonic generator, which is arranged on the side wall of the aeration chamber.

7. The sewage and wastewater combined pretreatment device according to claim 1 is characterized in that: The friction polarization scale inhibitor includes: a shell and a plurality of polarization chips, the shell has a scale inhibition cavity, the polarization chips are arranged in the scale inhibition cavity in sequence and staggered with each other, a first protrusion is arranged on the first surface of each polarization chip, and a second protrusion is arranged on the second surface of each polarization chip.

8. The sewage and wastewater combined pretreatment device according to claim 1 is characterized in that: Also includes: A first delivery pump and a first delivery pipe, the ROS aeration tank is connected with the reaction tank through the first delivery pump and the first delivery pipe.

9. The sewage and wastewater combined pretreatment device according to claim 8, characterized in that: Also includes: a second delivery pump and a second delivery pipe, wherein the reaction pool is connected with the biochemical pool through the second delivery pump and the second delivery pipe.

10. The sewage and wastewater combined pretreatment device according to claim 9, characterized in that: Also includes: A third delivery pump and a third delivery pipe, the biochemical pool is connected with the friction polarization antiscalant through the third delivery pump and the third delivery pipe.

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