Domestic sewage resource utilization low-carbon full-physical treatment system

Abstract

The utility model discloses a low-carbon full-physical-method treatment system for domestic sewage resource utilization. The low-carbon full-physical-method treatment system comprises a first micro-channel reactor, a second micro-channel reactor, a third micro-channel reactor and an electric flocculation reactor which are communicated in sequence, the first micro-channel reactor is used for separating and intercepting sewage particle suspended matters and carrying out pretreatment adsorption on high-concentration COD (Chemical Oxygen Demand) in sewage; the second micro-channel reactor is used for carrying out advanced treatment on low-concentration COD in the sewage; the third micro-channel reactor is used for carrying out adsorption treatment on high-concentration nitrogen and phosphorus pollutants in the sewage; the electric flocculation reactor is used for deeply treating low-concentration nitrogen and phosphorus pollutants in the sewage. The device has the beneficial effects that the conventional sewage treatment process taking a biochemical method as a core is broken through, the problems of high carbon emission, complicated process, larger occupied area, higher cost and the like in the existing method are solved, and the carbon neutralization reform process flow for domestic sewage treatment taking a green separation method as a core is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a domestic sewage resource utilization low-carbon all-physical method treatment system. Background Art

[0002] Existing, more mature domestic sewage treatment technologies generally use anoxic / aerobic processes. Biochemical treatment processes, for example, are highly effective at treating dissolved pollutants in domestic sewage. For example, invention patent applications 202110697386.6, 201910767750.4, 201910767760.8, and 201910767759.5 all utilize traditional biochemical treatment.

[0003] The biochemical method of sewage treatment has high carbon emissions during the treatment process, and occupies a large area, has a complex process and is costly.

[0004] Therefore, it is necessary to propose a low-carbon treatment system for domestic sewage, break through the conventional sewage treatment process with biochemical method as the core, solve the problems of high carbon emissions, complex process, large footprint and high cost of existing methods, and realize the carbon neutrality transformative process of domestic sewage treatment with green separation method as the core. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, propose a low-carbon, all-physical treatment system for domestic sewage resources, break through the conventional sewage treatment process with biochemical method as the core, solve the problems of high carbon emissions, complex process, large footprint, and high cost of the existing method, and realize the carbon neutrality transformative process of domestic sewage treatment with green separation method as the core.

[0006] The purpose of the utility model is achieved through the following technical solutions: a low-carbon, all-physical treatment system for domestic sewage resources, comprising a first microchannel reactor, a second microchannel reactor, a third microchannel reactor and an electric flocculation reactor connected in sequence; the first microchannel reactor is used to separate and intercept suspended matter in sewage particles and perform pre-treatment adsorption on high-concentration COD in sewage; the second microchannel reactor is used to perform deep treatment on low-concentration COD in sewage; the third microchannel reactor is used to perform adsorption treatment on high-concentration nitrogen and phosphorus pollutants in sewage; and the electric flocculation reactor is used to perform deep treatment on low-concentration nitrogen and phosphorus pollutants in sewage.

[0007] It also includes a lift pump connected to the water inlet of the first microchannel reactor.

[0008] The invention also comprises a steam generator and an ultrasonic cyclone device which are respectively connected with the first microchannel reactor, the second microchannel reactor and the third microchannel reactor.

[0009] The first microchannel reactor, the second microchannel reactor, and the third microchannel reactor all include a main body, with a water distributor and a retention bottom plate respectively provided at both ends of the main body. A filter bed is provided in the main body, and a water outlet and a backwash inlet are connected on the retention bottom plate. A three-phase separator is connected on the water distributor, and a water inlet and a backwash outlet are connected on the three-phase separator.

[0010] The filter bed in the first microchannel reactor is composed of a pore structure composed of anthracite and a surface active filter membrane composed of quartz sand.

[0011] The filter bed in the second microchannel reactor is composed of bamboo charcoal granular media.

[0012] The filter bed in the third microchannel reactor is composed of natural zeolite.

[0013] The beneficial effects of the present invention are: breaking through the conventional sewage treatment process with biochemical method as the core, solving the problems of high carbon emissions, complex process, large footprint, and high cost in the existing method, and realizing a transformative process of carbon neutrality in domestic sewage treatment with green separation method as the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the utility model;

[0015] Figure 2 Schematic diagram of the first microchannel reactor;

[0016] In the figure, 1-first microchannel reactor, 2-second microchannel reactor, 3-third microchannel reactor, 4-electroflocculation reactor, 5-lift pump, 6-steam generator, 7-ultrasonic cyclone device, 8-main body, 9-water distributor, 10-retention bottom plate, 11-filter bed, 12-water outlet, 13-backwash inlet, 14-three-phase separator, 15-water inlet, 16-backwash outlet. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0018] It is to be noted that the directions of "left", "right", "up", "down", "front", "back", "inside" and "outside" in the following schemes are all relative directions and are not listed here one by one.

[0019] A low-carbon all-physical treatment system for domestic sewage resources, reference Figure 1 The apparatus comprises a lift pump 5, a first microchannel reactor 1, a second microchannel reactor 2, a third microchannel reactor 3 and an electric flocculation reactor 4 which are sequentially connected. The apparatus also comprises a steam generator 6 and an ultrasonic cyclone device 7 which are respectively connected to the first microchannel reactor 1, the second microchannel reactor 2 and the third microchannel reactor 3.

[0020] refer to Figure 2 The first microchannel reactor 1, the second microchannel reactor 2, and the third microchannel reactor 3 all include a main body 8. A filter bed 11 is provided in the main body 8. A water distributor 9 is provided at the upper end of the main body 8, and a retention bottom plate 10 is provided at the lower end. A water outlet 12 and a backwash inlet 13 are provided at the lower end of the main body 8. The backwash inlet 13 is connected to the steam generator 6. A three-phase separator 14 is provided at the upper end of the main body 8. A water inlet 15 and a backwash outlet 16 are provided at the upper end of the main body 8. The backwash outlet 16 is connected to the ultrasonic cyclone device 7.

[0021] The filter bed 11 within the first microchannel reactor 1 is composed of an anthracite pore structure and an activated filter membrane on the surface of quartz sand. The microchannel pore structure within the first microchannel reactor 1 collides, intercepts, and adsorbs particulate matter in the sewage, achieving deep separation of suspended particulate matter. Simultaneously, the anthracite pore structure within the bed and the activated filter membrane on the surface of quartz sand provide initial adsorption of high-concentration COD in the incoming water.

[0022] The filter bed 11 in the second microchannel reactor 2 is composed of bamboo charcoal granules. Made from high-altitude bamboo over three years old, bamboo charcoal is sintered at temperatures approaching 1,000 degrees Celsius. It possesses a loose, porous structure, fine-grained, porous molecules, a hard texture, and a high specific surface area of ​​300-600 m² / g, resulting in a strong adsorption capacity for low-concentration COD. COD adsorption can be categorized as physical adsorption or chemical adsorption. Physical adsorption occurs when the surface of bamboo charcoal is subjected to uneven forces, attracting the substance to the surface and achieving its purification effect. Chemical adsorption occurs when bamboo charcoal contains a rich variety of functional groups, such as nitrogen- and oxygen-containing groups, which interact with COD to produce adsorption.

[0023] The filter bed 11 in the third microchannel reactor 3 is composed of natural zeolite. Natural zeolite is a porous aluminosilicate mineral with an anionic framework crystalline structure. The main units constituting the anionic framework structure of the zeolite crystal are silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron. Zeolite has a preferential selective adsorption effect on polar, unsaturated and easily polarizable molecules such as ammonia nitrogen. In addition to physical adsorption, it also has an ion exchange effect, NH 4+ Ions can be exchanged with metal cations in zeolites and adsorbed around the zeolite aluminum oxide tetrahedron structure as neutralized charge ions.

[0024] During the electrocoagulation process, the electrocoagulation reactor 4 applies an external voltage to cause an electrochemical reaction between the electrodes and pollutants such as nitrogen and phosphorus in the water, and produces active substances through redox reactions at the positive and negative electrodes. These active substances diffuse into the water body through Brownian motion under the action of the electric field, and flocculate with the pollutants in the water; the electric field effect causes the particles to be affected by the electric field force, resulting in electromigration movement; the charge effect causes the particles to deposit on the electrode surface, forming a charge layer, which increases the attraction between the particles and makes it easier for the particles to condense into larger aggregates; the sedimentation process is that the condensed particles settle downward due to the increase in mass, and larger aggregates settle quickly, thereby achieving the removal of low-concentration nitrogen and phosphorus pollutants.

[0025] The low-temperature steam generated by the steam generator 6 and the system outlet water are used to backwash the first microchannel reactor 1, the second microchannel reactor 2 and the third microchannel reactor 3 to achieve desorption and regeneration of the granular medium. The high-concentration backwash water is recovered and treated by the ultrasonic cyclone device 7. The ultrasonic cyclone device 7 mainly uses ultrasonic standing waves to generate cavitation effect in the water body, and stimulates the sound field through stirring, thereby strengthening the cavitation effect and generating a large number of active species (HO·, O2·, etc.) in the water body to oxidize and degrade NH 4+ and COD, and its degradation products are mainly harmless N2, etc.

[0026] When the filter bed 11 is continuously operated until the medium operating pressure difference increases to a certain value, gas or material to be separated can be added from the bottom of the filter bed 11 to perform a regeneration operation, so that the filter bed 11 is completely fluidized and boiling; the fluidized medium particles are subjected to high-speed rotation and revolution under the action of the three-phase separator 14, thereby achieving the purpose of desorption and regeneration of the medium particles.

[0027] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above description or through techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A low-carbon all-physical treatment system for domestic sewage resources, characterized in that: The invention comprises a first microchannel reactor (1), a second microchannel reactor (2), a third microchannel reactor (3) and an electric flocculation reactor (4) which are connected in sequence; the first microchannel reactor (1) is used to separate and intercept suspended solids in sewage particles and to pre-treat and adsorb high-concentration COD in sewage; the second microchannel reactor (2) is used to perform deep treatment on low-concentration COD in sewage; the third microchannel reactor (3) is used to perform adsorption treatment on high-concentration nitrogen and phosphorus pollutants in sewage; and the electric flocculation reactor (4) is used to perform deep treatment on low-concentration nitrogen and phosphorus pollutants in sewage; The first microchannel reactor (1), the second microchannel reactor (2), and the third microchannel reactor (3) all comprise a body (8), with a water distributor (9) and a retention bottom plate (10) being provided at both ends of the body (8), a filter bed (11) being provided in the body (8), a water outlet (12) and a backwash inlet (13) being provided in communication with the retention bottom plate (10), a three-phase separator (14) being provided in communication with the water distributor (9), and a water inlet (15) and a backwash outlet (16) being provided in communication with the three-phase separator (14).

2. A low-carbon all-physical method treatment system for domestic sewage resources according to claim 1, characterized in that: It also includes a lift pump (5) connected to the water inlet of the first microchannel reactor (1).

3. A low-carbon all-physical method treatment system for domestic sewage resources according to claim 1, characterized in that: It also includes a steam generator (6) and an ultrasonic cyclone device (7) which are respectively connected to the first microchannel reactor (1), the second microchannel reactor (2), and the third microchannel reactor (3).

4. A low-carbon all-physical method treatment system for domestic sewage resources according to claim 1, characterized in that: The filter bed (11) in the first microchannel reactor (1) is composed of a pore structure composed of anthracite and a surface active filter membrane composed of quartz sand.

5. A low-carbon all-physical method treatment system for domestic sewage resources according to claim 1, characterized in that: The filter bed (11) in the second microchannel reactor (2) is composed of bamboo charcoal granular media.

6. A low-carbon all-physical method treatment system for domestic sewage resources according to claim 1, characterized in that: The filter bed (11) in the third microchannel reactor (3) is made of natural zeolite.

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