Sewage treatment equipment integrating biological oxidation and suspended solid interception

Abstract

The utility model discloses sewage treatment equipment integrating biological oxidation and suspended solid interception, which relates to the technical field of sewage treatment and comprises an anoxic tank, a first middle water collecting tank, a first-stage aerobic tank, a second-stage aerobic tank, a second middle water collecting tank and a dephosphorization tank which are sequentially communicated along the water inlet direction, the bottom of the anoxic tank is connected with a drainage pipeline; the water inlet pipe is connected with a lift pump; the dephosphorization tank is connected with a water outlet pipe; a water distribution component is connected in the anoxic tank and is connected with the water outlet end of the lifting pump; a gas distribution component is connected in the first-stage aerobic tank and the second-stage aerobic tank, and is connected with oxygen supply equipment; a top water conveying pipe of the primary aerobic tank is connected with a bottom water inlet pipe of the secondary aerobic tank; a stirring structure is connected in the dephosphorization tank; and the lifting pump, the oxygen supply equipment and the stirring structure are respectively connected with the control unit in a signal connection manner. The method has the advantages of high solvent load and hydraulic load, short hydraulic retention time, low required capital construction investment, low operation energy consumption, low operation cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to sewage treatment equipment integrating biological oxidation and interception of suspended solids. Background Art

[0002] With the continuous acceleration of urbanization, the research on sewage treatment technology has become more and more important. Sewage treatment technology is an important means to solve the problem of urban water resource utilization. It can not only reduce water resource waste, but also improve water resource utilization efficiency and reduce environmental pressure.

[0003] Traditional sewage treatment technology mainly includes process flow and equipment. The process flow generally includes pretreatment, biological treatment and post-treatment. Pretreatment mainly treats large particle waste and organic pollutants, including physical and chemical methods. Biological treatment generally uses microorganisms to degrade organic matter into inorganic matter, including anaerobic treatment and aerobic treatment. Post-treatment is mainly to improve water quality, mainly using filtration and oxidation.

[0004] Traditional sewage treatment equipment mainly includes sedimentation tanks, bioreactors, filter tanks, etc. Among them, bioreactors are the main process section, which can be divided into activated sludge method, solid bed bioreactor and membrane bioreactor, etc. Although traditional sewage treatment technology is widely used and has a mature technical system and operation and maintenance management experience, it still has the following problems:

[0005] (1) The treatment effect is unstable, the treatment effect on some components in sewage is poor, and the effluent quality is unstable;

[0006] (2) The equipment maintenance cost is high, the amount of sludge generated is large, and the operating cost is high;

[0007] (3) The reuse rate of treated water is low, and water resources are not maximized;

[0008] (4) It occupies a large area and requires large initial investment. Utility Model Content

[0009] Based on the problems existing in the background technology, the utility model proposes a sewage treatment equipment integrating biological oxidation and interception of suspended solids, which has the advantages of high organic load, small footprint, good effluent quality, low operating energy consumption and low operating cost.

[0010] The utility model is realized by the following technical solutions:

[0011] The present application provides a sewage treatment device integrating biological oxidation and suspended solids interception, comprising an anoxic tank, a first intermediate water collection tank, a primary aerobic tank, a secondary aerobic tank, a second intermediate water collection tank and a dephosphorization tank which are sequentially connected along the water inlet direction;

[0012] The top of the anoxic tank is connected to a water inlet pipe, and the bottom is connected to a drainage pipe; the water inlet pipe is connected to a lifting pump for lifting sewage; the dephosphorization tank is connected to a water outlet pipe;

[0013] A water distribution component is connected to the anoxic pool, and the water distribution component is connected to the water outlet of the lift pump;

[0014] The first-level aerobic pool and the second-level aerobic pool are connected with air distribution components, and the air distribution components are connected to oxygen supply equipment; the water pipe at the top of the first-level aerobic pool is connected to the water inlet pipe at the bottom of the second-level aerobic pool;

[0015] The dephosphorization tank is connected with an agitator;

[0016] The lifting pump, oxygen supply equipment and stirrer are respectively connected to the control unit by signal connection.

[0017] The anoxic pool may also be provided with a drug pipe connected to the carbon source storage tank, and the drug pipe is connected to a drug pump connected to the control unit signal.

[0018] The dephosphorization tank can also be connected to a dephosphorization agent storage tank with a medicine pipe, and a medicine pump connected to the control unit signal is connected to the medicine pipe. A water distribution device is also connected to the dephosphorization area, including a water distribution tank, and a channel connected to the dephosphorization tank is provided at the bottom of the water distribution tank, and the bottom of the dephosphorization tank is a bucket-shaped structure.

[0019] The effluent from the second intermediate water collection tank overflows to the coagulation and mixing area of ​​the dephosphorization area, and is evenly distributed to the sedimentation area of ​​the dephosphorization area through the water distribution device. The mud and water are separated under the action of the filler. The separated clean water is connected to the outlet pipe for discharge, and the sludge is connected to the sludge discharge pipe for discharge to the sludge pool.

[0020] The anoxic tank may also be connected to a drain pipe.

[0021] Among them, the primary aerobic pool and the secondary aerobic pool are also connected with mud discharge pipes.

[0022] The entire sewage treatment equipment can be set as an above-ground or underground type, and the overall preparation material can be carbon steel or stainless steel.

[0023] Furthermore, the water distribution component includes a water distributor connected to the water inlet pipe, the water inlet pipe extends to the bottom of the anoxic pool and is connected to a water distribution pipe, and the water distribution pipe is provided with a plurality of water outlet holes.

[0024] Furthermore, a reflux pipe is connected between the second intermediate water collection tank and the anoxic tank, a reflux pump is connected to the reflux pipe, and the reflux pump is signal-connected to the control unit.

[0025] A reflux pipeline is set between the second intermediate water collection tank and the anoxic tank, and the effluent from the secondary aerobic zone can be returned to the front end of the anoxic zone through a reflux pump.

[0026] Furthermore, the first-level aerobic pool and the second-level aerobic pool are sequentially connected with a filter head, a solid filler, a suspended filler and a filler grid from bottom to top.

[0027] Among them, the suspended filler is made of foam material with light weight and large specific surface area. It can be in a suspended flow state with the water flow, allowing the microorganisms to fully and comprehensively contact with the sewage to achieve the best reaction effect.

[0028] Among them, the filler grid, solid filler and suspended filler intercept the filler during backwashing, and the air-water backwash collides with the filler grid shape to produce an extrusion effect, retaining the filler while cleaning away the aged membrane and intercepted suspended pollutants.

[0029] Among them, the solid filler is a porous hard filler with a large specific surface area, which will greatly increase the biomass of the sewage treatment system and effectively improve the sewage treatment efficiency.

[0030] Among them, the packing grid is set to intercept the solid packing and the suspended packing when they are backwashed, and the air-water backwashing collides with the packing grid to produce a squeezing effect, thereby retaining the packing while cleaning away the aged membrane and intercepted suspended pollutants.

[0031] Furthermore, an aerator is connected between the solid filler and the filter head, and the aerator is connected to an aeration fan.

[0032] By connecting the aerator, air can be evenly distributed to the biochemical system to ensure the oxygen demand of the biochemical system.

[0033] Furthermore, the primary aerobic tank and the secondary aerobic tank are both connected with a backwash air distribution structure; the backwash air distribution structure is connected to the backwash fan between the equipment through a flange.

[0034] The backwash air distribution structure mainly adopts a pipeline, and then an air outlet is set on the pipeline.

[0035] Furthermore, the filler connected in the anoxic tank is a composite filler.

[0036] Furthermore, the filler connected in the dephosphorization tank is an inclined tube filler.

[0037] Furthermore, an agitator is connected to the second intermediate water collecting tank.

[0038] The agitators can be two paddle agitators.

[0039] Furthermore, the bottoms of the primary aerobic tank and the secondary aerobic tank are both connected with backwashing air and water pipelines.

[0040] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0041] (1) The sewage treatment equipment in this application has the advantages of high organic load, small footprint (1 / 3 of the ordinary activated sludge method), low investment (saving 30%), no sludge bulking, high oxygen transfer efficiency, and good effluent quality;

[0042] (2) The sewage treatment equipment mentioned in the application integrates biological oxidation and suspended solids interception, and does not require the installation of subsequent sedimentation tanks. It has the advantages of large solvent load and hydraulic load, short hydraulic retention time, small infrastructure investment, low operating energy consumption, and low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0044] Figure 1 This is a schematic diagram of the structure of a sewage treatment device integrating biological oxidation and interception of suspended solids in the utility model;

[0045] Figure 2 It is a top view of a sewage treatment device integrating biological oxidation and suspended solids interception in the utility model;

[0046] Figure 3 The utility model is a schematic diagram of the bottom structure of a sewage treatment device integrating biological oxidation and interception of suspended solids.

[0047] Marks and corresponding parts names in the attached drawings:

[0048] 1-anoxic tank, 2-first intermediate water collection tank, 3-primary aerobic tank, 4-secondary aerobic tank, 5-second intermediate water collection tank, 6-phosphorus removal tank, 7-water distributor, 8-water outlet pipe, 9-combined filler, 10-water distribution pipeline, 11-drainage pipeline, 12-lifting pump, 13-first filter head, 14-solid filler, 15-suspended filler, 16-filler grid, 17-top water delivery pipe, 18-second filter head, 19-mixer, 20-water distribution device, 21-inclined tube filler, 22-aerator, 23-reflux pump, 24-backwash air distribution structure. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, a connection or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Example 1

[0054] like Figures 1 to 3 As shown, this embodiment provides a sewage treatment device integrating biological oxidation and suspended solids interception, comprising an anoxic tank 1, a first intermediate water collection tank 2, a primary aerobic tank 3, a secondary aerobic tank 4, a second intermediate water collection tank 5 and a dephosphorization tank 6 which are sequentially connected along the water inlet direction;

[0055] The anoxic tank 1 is connected to a water inlet pipe at the top and a drainage pipe 11 at the bottom; a lifting pump 12 for lifting sewage is connected to the water inlet pipe; the dephosphorization tank 6 is connected to a water outlet pipe 8;

[0056] A water distribution component is connected to the anoxic pool 1, and the water distribution component is connected to the water outlet of the lift pump 12;

[0057] The primary aerobic pool 3 and the secondary aerobic pool 4 are connected with air distribution components, and the air distribution components are connected to the oxygen supply equipment; the top water pipe 17 of the primary aerobic pool 3 is connected to the bottom water inlet pipe of the secondary aerobic pool 4;

[0058] The dephosphorization tank 6 is connected with an agitator 19;

[0059] The lifting pump 12, the oxygen supply device and the stirrer 19 are respectively connected to the control unit by means of signal connection.

[0060] Specifically, the anoxic pool 1 is connected to a water distributor 7, and the anoxic pool 1 is connected to a composite filler 9, a water distribution pipe 10 and a drainage pipe 11. The water distributor 7 arranged on the top of the anoxic pool 1 is connected to the water distribution pipe 10 through a pipe, so as to evenly distribute water to the bottom of the anoxic pool 1 and have a stirring function. The composite filler 9 arranged in the anoxic pool 1 provides a place for microorganisms to survive and reproduce. A lifting pump is arranged in the first intermediate water collection area to connect the water inlet pipe of the primary aerobic zone.

[0061] Specifically, the first filter head 13, solid filler 14, suspended filler 15 and filler grid are connected in sequence from bottom to top in the first-level aerobic tank 3, wherein the first-level aerobic tank 3 is connected with an aerator 22 and a backwash water and air distribution device, and the aerator 22 is connected to an aeration fan, which can evenly distribute air to the biochemical system to ensure the oxygen demand of the biochemical system.

[0062] The second filter head 18, solid filler 14, suspended filler 15 and filler grid are sequentially connected from bottom to top in the secondary aerobic pool 4. The water pipe 17 at the top of the primary aerobic pool 3 is connected to the water inlet pipe at the bottom of the secondary aerobic pool 4 for water distribution, and evenly distributes water and air through the second special filter head, and passes through the special solid filler 14 and suspended filler 15 in sequence.

[0063] The primary aerobic zone distributes water through the bottom water inlet pipe, distributes water and air evenly through the first filter head 13, and passes through the solid filler 14 and the suspended filler 15 in turn, wherein the solid filler 14 is a porous hard filler with a large specific surface area, which will greatly increase the biomass of the sewage treatment system and effectively improve the sewage treatment efficiency. The suspended filler 15 is made of foam material, which is light in weight and large in specific surface area. It can be in a suspended flow state with the water flow, so that the microorganisms and the sewage can be fully and comprehensively contacted to achieve the best reaction effect. The filler grid 16 set in the primary aerobic pool 3 intercepts the filler when the special solid filler 14 and the suspended filler 15 are backwashed, and collides with the filler grid through air-water backwashing to produce an extrusion effect, retaining the filler while cleaning away the aging membrane and the suspended pollutants intercepted.

[0064] Specifically, the first aerobic tank 3 and the second aerobic tank 4 are both connected with a backwash air distribution structure 24; the backwash air distribution structure 24 is connected to the backwash fan between the equipment through a flange.

[0065] The backwash air distribution structure 24 mainly adopts a pipeline, and then an air outlet is arranged on the pipeline.

[0066] Specifically, a reflux pipeline is connected between the second intermediate water collecting tank 5 and the anoxic tank 1 , a reflux pump 23 is connected to the reflux pipeline, and the reflux pump 23 is signal-connected to the control unit.

[0067] A reflux pipeline is provided between the second intermediate water collection tank 5 and the anoxic tank 1 , and the effluent from the secondary aerobic zone can be refluxed to the front end of the anoxic zone through a reflux pump 23 .

[0068] Specifically, two paddle stirrers 23 are connected in the second intermediate water collecting tank 5 .

[0069] Specifically, the dephosphorization tank 6 is connected with a stirring device, a water distribution device 20, and an inclined tube filler 21. The water from the second intermediate water collection tank 5 overflows to the coagulation and stirring area of ​​the dephosphorization tank 6, and is evenly distributed to the sedimentation area of ​​the dephosphorization tank 6 by the water distribution device 20. The mud and water are separated under the action of the inclined tube filler 21. The separated clean water is connected to the outlet pipe 8 for discharge, and the sludge is connected to the sludge discharge pipe for discharge to the sludge tank.

[0070] Example 2

[0071] like Figures 1 to 3 As shown, this embodiment provides a sewage treatment equipment integrating biological oxidation and suspended solids interception, specifically a set of 200m 3 / d treatment capacity of sewage treatment equipment, the size of the sewage treatment equipment is LxBxH = 8.9x2.8x4.0m and LxBxH = 7.2x2.8x4.0m. The equipment is made of stainless steel. The water inlet pipe is connected to the water distributor 7 at the top of the anoxic pool 1 by a flange, and is evenly arranged at the bottom of the anoxic pool 1 through the water distribution pipe 10, which has the functions of water distribution and stirring. The anoxic pool 1 collects water through the overflow weir on the top of the pool and flows to the first intermediate water collection pool 2, and then is lifted by the sewage lifting pump 12 to the water distribution area at the bottom of the primary aerobic pool 3. The primary aerobic pool 3 evenly distributes water and air through the filter head. The filter head is filled with special solid fillers 14 and suspended fillers 15 with a height of 0.8m respectively. The filling rate of the suspended filler 15 is 50%. A special aerator 22 is provided at the bottom of the solid filler 14 and is directly connected to the aeration fan. The top of the primary aerobic pool 3 collects water through an overflow weir and flows into the water distribution area at the bottom of the secondary aerobic pool 4 through a pipeline. The backwash air and water pipeline is arranged in the water distribution area at the bottom of the pool. The secondary aerobic pool 4 evenly distributes water and air through a filter head. The filter head is filled with a special fixed filler and a suspended filler 15 with a height of 0.8m respectively. The filling rate of the suspended filler 15 is 50%. The top of the secondary aerobic pool 4 collects water through an overflow weir and flows into the second intermediate water collection pool 5 through a pipeline. The aeration backwash air and water pipeline is arranged in the water distribution area at the bottom of the pool. A nitrification liquid reflux pump 23 is provided in the second intermediate water collection area, and the nitrification liquid is transported to the front end of the anoxic pool 1 through the nitrification liquid reflux pump 23. Two paddle agitators 23 are installed in the second intermediate water collection pool 5. The motor power of the paddle agitator 23 is 0.37KW, and the paddle diameter is 0.5m. The filler in the dephosphorization pool 6 is an inclined tube filler 21 with a length of 0.5m, an inclination angle of 60°, and an inclined tube diameter of 60mm.

[0072] The water inlet flow variation coefficient of the sewage treatment equipment of this embodiment is between 1.1 and 1.6. It is provided with anoxic section, aerobic section and dephosphorization section, which can comprehensively and effectively remove organic pollutants, ammonia nitrogen, TP, TN and SS in sewage. The anoxic section is provided with a combined filler 9, which can greatly improve the denitrification efficiency and improve the TN removal rate. The aerobic section is filled with solid fillers 14 and suspended fillers 15, which can greatly increase the amount of microorganisms, thereby increasing the volume load of the system, effectively reducing the residence time of sewage, and greatly reducing the tank capacity. The dephosphorization tank 6 is provided, which can effectively separate mud and water, and remove most of the TP and SS substances in the sewage, so that the effluent can stably meet the standards.

[0073] According to the actual operation, the following data are obtained: after the conventional domestic sewage enters the equipment, it reaches the Class A standard after normal process treatment. Among them, the CODcr removal rate reaches more than 90%, the BOD5 removal rate reaches more than 95%, the SS removal rate reaches more than 99%, the ammonia nitrogen removal rate reaches more than 95%, and the TN removal rate reaches more than 80%, and the effluent can stably meet the standards.

[0074] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A sewage treatment equipment integrating biological oxidation and interception of suspended solids, characterized in that: It comprises an anoxic tank (1), a first intermediate water collection tank (2), a primary aerobic tank (3), a secondary aerobic tank (4), a second intermediate water collection tank (5) and a dephosphorization tank (6) which are sequentially connected along the water inlet direction; The anoxic tank (1) is connected to a water inlet pipe at the top and a drainage pipe (11) at the bottom; the water inlet pipe is connected to a lifting pump (12) for lifting sewage; the dephosphorization tank (6) is connected to a water outlet pipe (8); A water distribution component is connected to the anoxic pool (1), and the water distribution component is connected to the water outlet of the lift pump (12); The primary aerobic pool (3) and the secondary aerobic pool (4) are connected with air distribution components, and the air distribution components are connected to oxygen supply equipment; the top water pipe (17) of the primary aerobic pool (3) is connected to the bottom water inlet pipe of the secondary aerobic pool (4); The dephosphorization tank (6) is connected to a stirrer (19); The lift pump (12), oxygen supply equipment and stirrer (19) are respectively connected to the control unit by means of signal connection.

2. A sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 1, characterized in that: The water distribution component comprises a water distributor (7) connected to the water inlet pipe, the water inlet pipe extends to the bottom of the anoxic pool (1) and is connected to a water distribution pipe (10), and the water distribution pipe (10) is provided with a plurality of water outlet holes.

3. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 1 is characterized in that: A reflux pipeline is connected between the second intermediate water collection tank (5) and the anoxic tank (1), a reflux pump (23) is connected to the reflux pipeline, and the reflux pump (23) is signal-connected to the control unit.

4. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 1 is characterized in that: The first-level aerobic pool (3) and the second-level aerobic pool (4) are sequentially connected with a filter head, a solid filler (14), a suspended filler (15) and a filler grid (16) from bottom to top.

5. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 4 is characterized in that: An aerator (22) is also connected between the solid filler (14) and the filter head, and the aerator (22) is connected to an aeration fan.

6. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 4 is characterized in that: The primary aerobic tank (3) and the secondary aerobic tank (4) are both connected to a backwash air distribution structure (24).

7. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 6 is characterized in that: The backwash air distribution structure (24) is connected to the backwash fan between the equipment via a flange.

8. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 1 is characterized in that: The filler connected in the anoxic pool (1) is a composite filler (9).

9. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 1 is characterized in that: The filler connected in the dephosphorization tank (6) is an inclined tube filler (21).

10. The sewage treatment equipment integrating biological oxidation and suspended solids interception according to claim 1, characterized in that: The dephosphorization tank (6) is connected to a water distribution device, comprising a water distribution trough, a channel communicating with the dephosphorization tank (6) is arranged at the bottom of the water distribution trough, and the bottom of the dephosphorization tank (6) is a bucket-shaped structure.

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