Integrated domestic sewage treatment system

Abstract

The present application relates to sewage treatment technical field, in order to solve the internal physical separation of sewage treatment equipment in the prior art, the volume of each process section is fixed, the sewage treatment capacity of equipment is fixed, each process section volume cannot be adjusted with the change of external factors, thereby the sewage treatment capacity of equipment is inconvenient to adjust;An integrated domestic sewage treatment system is provided, including horizontal tank body, the front end of the inside of tank body is provided with at least a group of first aeration device, the rear end of the inside of tank body is provided with at least a group of membrane module and second aeration device;And the front end and the rear end in the inside of tank body are formed by the first aeration device, membrane module and second aeration device in tank body to form pressure difference, so that the sewage in tank body reciprocating flows from rear end to front end;It can realize the flow of sewage between different fuzzy process sections, complete biochemical reaction process, reduce equipment cost, energy consumption and failure rate, and improve the effect of standard discharge rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to an integrated domestic sewage treatment system. BACKGROUND

[0002] The activated sludge method is used in the integrated domestic sewage treatment equipment, and many sewage treatment processes are adopted, such as AO, A 2 O, SBR, etc., but all of them use physical separation methods such as partitions to physically separate the internal space in the integrated domestic sewage treatment equipment, form different separated spaces corresponding to different process sections, and finally form different process section separated compartments in the integrated domestic sewage treatment equipment. The flow of sewage between the process section separated compartments is realized by using self-flow or pump delivery, the nitrification and denitrification reactions are realized, the sewage is purified by the activated sludge, and the water quality of the effluent reaches the first level A standard (GB18918-2002). However, after the physical separation method is used to form different process separated compartments, the volume of each process section is fixed and cannot be changed, and therefore the sewage treatment capacity of the equipment is fixed and cannot be adjusted according to changes in external factors, so that the sewage treatment capacity of the equipment cannot be adjusted, and the energy consumption of the integrated sewage treatment equipment is minimized under the condition that the effluent meets the standard. At the same time, the sludge concentration in each process section needs to be adjusted by using self-flow or pump delivery, and the pump delivery consumes a large amount of energy, and the sludge concentration in each process section is difficult to reach a uniform state. Since the mechanical water pump delivery method is used, the equipment cost is increased, and when the water pump failure rate is high, the standard discharge rate of the sewage treatment is low. SUMMARY

[0003] The present application solves the problem that the sewage treatment equipment in the prior art uses physical separation such as partitions, the volume of each process section is fixed, the sewage treatment capacity of the equipment is fixed, and each process section cannot be adjusted according to changes in external factors, so that the sewage treatment capacity of the equipment cannot be adjusted. A fuzzy partition integrated domestic sewage treatment system is provided, which can realize the flow of sewage between different fuzzy process sections, complete the biochemical reaction process, reduce the equipment cost, energy consumption and failure rate, and improve the standard discharge rate.

[0004] The embodiments of the present application are realized by the following technical solutions:

[0005] An integrated domestic sewage treatment system, comprising a horizontal tank body, at least one set of first aeration devices is arranged at the front end of the tank body, at least one set of membrane assemblies and second aeration devices are arranged at the rear end of the tank body; and a pressure difference is formed in the tank body between the front end and the rear end of the tank body through the first aeration devices, the membrane assemblies and the second aeration devices, so that the sewage in the tank body flows reciprocally from the rear end to the front end.

[0006] Further, the first aeration device is a disc type micro-porous aeration device, and the second aeration device is a micro-porous aeration device; and the membrane assembly is a membrane assembly with a perforated aeration device.

[0007] Further, the membrane assemblies are arranged side by side in two.

[0008] Further, the micro-porous aeration devices are arranged in four, two of which are arranged below the two membrane assemblies, respectively, and the other two are arranged in an up-down manner and located at the last end inside the tank body.

[0009] Further, the membrane assembly comprises a membrane frame, a water channel, a gas channel, a hollow fiber membrane, a U-shaped tube and a perforated aeration pipe; the hollow fiber membrane is placed in the membrane frame and connected to the water channel in the membrane frame through the U-shaped tube; the perforated aeration pipe is installed at the bottom of the membrane frame and connected to the gas channel in the membrane frame, and the gas channel in the membrane frame is communicated with a submersible fan.

[0010] Further, the tank body is further provided with a plurality of submersible fans, which are arranged between the membrane assemblies and the first aeration device.

[0011] Further, the submersible fans are arranged in 1-5 and arranged side by side in sequence.

[0012] Further, the aeration amount of the second aeration device at the rear end of the tank body and the membrane assembly is greater than that of the first aeration device at the front end.

[0013] Further, the tank body is further provided with a liquid level sensor, which is installed at the top of the inner side of the tank and located behind the disc type micro-porous aeration device.

[0014] Further, the tank body is further provided with a membrane grid, and the sewage is pretreated by the membrane grid and then introduced into the tank body through the water outlet pipe at the bottom of the membrane grid.

[0015] Further, the tank body is further provided with a clean water tank, and the clean water tank is provided with independent carbon source compartments, clean water compartments and phosphorus removal agent compartments, respectively; the hollow fiber membranes in the tank body are connected to the clean water compartments through a water production pump.

[0016] The technical scheme of the embodiment of the application has at least the following advantages and beneficial effects:

[0017] The present application adjusts the pressure difference between the front and back of the tank body, so that the mixed sludge flows from the front section to the back section in the upper part of the tank body, and flows from the back section to the front section in the lower part of the tank body, thereby replacing the original pump delivery mode to complete the flow of the mixed sludge; the position of the dissolved oxygen content K value in the water in the tank body is changed, thereby changing the O zone volume and the A zone volume set according to the dissolved oxygen content K value in the water, further changing the sewage treatment capacity and state of the integrated sewage treatment equipment, and under the condition of meeting the changes of external factors, the arrangement structure of each part inside and outside the tank body is not changed, so that the A zone and O zone volume inside the tank body can be freely adjusted, that is, the concept of fuzzy partition is formed, the flow of sewage between different fuzzy process sections is realized, the biochemical reaction process is completed, the effects of reducing equipment cost, energy consumption and failure rate, and improving the compliance discharge rate are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] Fig. 1 The structural schematic diagram of the integrated domestic sewage treatment system provided by the embodiments of the present application is shown in the figure.

[0020] Fig. 2 The process flow diagram of the integrated domestic sewage treatment system provided by the embodiments of the present application is shown in the figure.

[0021] Figure legend: 1-tank body, 2-membrane grid, 3-clean water tank, 31-carbon source compartment, 32-clean water compartment, 33-phosphorus removal agent compartment, 4-equipment room, 5-subsurface fan, 6-membrane assembly, 61-membrane frame, 62-hollow fiber membrane, 63-perforated aeration pipe, 7-second aeration device, 8-first aeration device, 9-liquid level sensor. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Embodiment 1

[0024] Please refer to Figs. 1-2The embodiment provides an integrated domestic sewage treatment system, which comprises a horizontal tank body 1, the tank body 1 is not physically separated by a partition plate, and the internal space of the tank body 1 is in a communication state; one water inlet and two detection ports are arranged on the top of the tank body 1, one detection port is located in front of the water inlet, and one detection port is located behind the water inlet; one overflow port is arranged on the upper middle part of the side of the tank body 1, and one sludge discharge port is arranged on the lower part of the side of the tank body 1.

[0025] The inside of the tank body 1 is paved with activated sludge; at least one group of first aeration devices 8 is arranged at the front end of the inside of the tank body 1, at least one group of membrane assemblies 6 and second aeration devices 7 are arranged at the rear end of the inside of the tank body 1; and a pressure difference is formed in the tank body 1 between the front end and the rear end of the inside of the tank body 1 through the first aeration devices 8, the membrane assemblies 6 and the second aeration devices 7, so that the sewage in the tank body 1 flows reciprocally from the rear end to the front end; specifically, the inside of the tank body 1 is sequentially arranged, from front to back, with two groups of disc type micro-porous aeration devices, a liquid level sensor 9, three submerged type blowers 5, two groups of membrane assemblies 6 with perforated aeration devices and three groups of tubular micro-porous aeration devices.

[0026] The application can realize the front and rear movement of the partition line in the tank body 1 by adjusting the two groups of disc type micro-porous aeration devices located at the front section of the tank body 1, the three groups of tubular micro-porous aeration devices located at the rear section of the tank body 1 and the sludge concentration in the tank body 1, i.e. adjusting the different aeration amounts of the aeration devices at the front and rear ends of the tank body 1, cooperating with the sludge concentration, changing the position of the dissolved oxygen K value in the water in the tank body 1, so as to change the O zone volume and the A zone volume set according to the dissolved oxygen K value in the water, and further changing the sewage treatment capacity and state of the integrated sewage treatment equipment, under the condition of meeting the change of external factors, without changing the arrangement structure of each component in the tank body 1, the A zone volume and the O zone volume in the tank body 1 can be freely adjusted, i.e. the concept of fuzzy partition is formed, the sewage flows between different fuzzy process sections, the biochemical reaction process is completed, the effects of reducing the equipment cost, energy consumption and failure rate and improving the discharge rate are achieved.

[0027] More preferably, the aeration amount of the three groups of micro-porous aeration devices + perforated aeration devices at the rear of the tank body 1 is much larger than that of the two groups of disc type aeration devices at the front, so that the air pressure at the rear of the tank body 1 is larger than that at the front of the tank body 1, under the driving of the air pressure difference, the mixed sludge liquid flows from the rear section to the front section of the tank body 1 at the bottom of the tank body 1. Therefore, the water flow and the air pressure difference between the front and rear sections of the tank body 1 are utilized, mainly to make the mixed sludge flow from the upper part of the tank body 1 from the front section to the rear section and flow from the lower part of the tank body 1 from the rear section to the front section, so as to replace the original pump conveying mode and complete the flow of the mixed sludge. After the sewage enters the integrated domestic sewage treatment equipment and is treated by the activated sludge process, the water quality of the effluent can reach the first level A standard (GB18918-2002).

[0028] The top of the tank 1 is provided with a platform, on which a membrane grid 2, a clean water tank 3 and a equipment room 4 are arranged from front to back respectively;

[0029] The sewage is pretreated by the membrane grid 2 and then is extended into the tank 1 through the water outlet pipe at the bottom of the membrane grid 2;

[0030] The clean water tank 3 is divided into three compartments by a partition, which are carbon source compartment 31, clean water compartment 32 and phosphorus removal agent compartment 33 from front to back respectively. The clean water compartment 32 is used for storing treated clean water, and the carbon source compartment 31 and the phosphorus removal agent compartment 33 are used for adding agents into the tank 1 to further treat the sewage in the tank 1. Specifically, the top of each of the carbon source compartment 31, the clean water compartment 32 and the phosphorus removal agent compartment 33 of the clean water tank 3 is covered with a cover plate. A dosing pump and a stirring motor are installed on the cover plate at the top of the carbon source compartment 31 of the clean water tank 3. A dosing pump is installed on the cover plate at the top of the phosphorus removal agent compartment 33 of the clean water tank 3. The front left side of the clean water tank 3 has a clean water outlet, and the front face of the rear section has a clean water inlet and a backwash outlet. The clean water inlet is connected with a water production pump through a pipeline, and the backwash outlet is connected with a backwash pump. An electromagnetic switch is arranged on the pipeline between the clean water inlet and the water production pump, and another electromagnetic switch is arranged on the pipeline between the backwash outlet and the backwash pump. That is, the treated clean water in the clean water compartment 32 can be directly connected with a landscape pool through a pipeline, so as to realize the reuse of the sewage. Meanwhile, the clean water in the clean water compartment 32 can be used to backwash the hollow fiber membrane 62 through the backwash outlet, so as to clean the impurities and maintain the treatment effect.

[0031] The equipment room 4 is provided with a water production pump, a backwash pump and two electromagnetic switches. The top of the equipment room 4 is covered with a cover plate, and there are two cabin doors on each of the left and right sides. The front part of the equipment room 4 is closed, and the rear part is open.

[0032] The inside of the tank body 1 is provided with two groups of disc type micro-hole aeration devices, liquid level sensor 9, three submerged blowers 5, two groups of membrane modules 6 and three groups of tubular micro-hole aeration devices from front to back; the two groups of disc type micro-hole aeration devices are horizontally and uniformly arranged at the bottom of the front section of the tank and connected with the three submerged blowers 5 through pipelines; the liquid level sensor 9 is installed in the rectangular window formed by the butt welding of steel plates behind the disc type micro-hole aeration devices in the tank; the three submerged blowers 5 are installed on the bracket in the tank, the horizontal plane of the bracket is located near the horizontal center line of the tank body 1, the vertical center line of the bracket is aligned with the vertical center line of the sludge discharge port arranged at the lower part of the side of the tank body 1, and the air inlet of the submerged blower 5 extends out of the rectangular window formed by the butt welding of steel plates; the two groups of membrane modules 6 are arranged at the rear part of the tank, and each group of membrane module 6 is provided with a certain number of hollow fiber membranes 62, the hollow fiber membranes 62 are connected with the water channel on the membrane rack 61 through the U-shaped tube, the water channel on the membrane rack 61 is connected with the water inlet of the water production pump, the perforated aeration pipe 63 is installed at the bottom of the membrane rack 61 and connected with the air channel on the membrane rack 61, the air channel on the membrane rack 61 is connected with the three submerged blowers 5, and the two groups of membrane modules 6 are arranged in the rectangular window formed by the butt welding of steel plates; the three groups of tubular micro-hole aeration devices, the first and second groups of which are horizontally arranged below the first and second groups of membrane modules 6 respectively, the third group of tubular micro-hole aeration devices is composed of upper and lower two layers of micro-hole aeration devices and arranged at the last end inside the tank body 1, and the three groups of tubular micro-hole aeration devices are connected with the three submerged blowers 5 through pipelines; the walkway is installed on the left and right sides of the upper part of the tank body 1; the guardrail is installed on the walkway and arranged in front, back, left and right; the ladder is installed at the front part of the tank body 1 and connected with the tank body 1 through bolts; the electrical control box is installed at the front part of the tank body 1 and located below the ladder platform, and the electrical control box is connected with the tank body 1 through bolts; the sludge discharge port arranged at the lower part of the side of the tank body 1 is connected with the sludge pump through pipelines; the lifting pump is connected with the membrane grid 2 through pipelines; the electrical control box is connected with the lifting pump, sludge pump and all electrical equipment installed on the tank body 1 through wires.

[0033] The air inlets of the submerged blowers 5 extend out of the tank body 1 and respectively intake air, which reduces the installation of air inlet pipelines and the generation of air resistance and is beneficial to improving the air production efficiency of the blower; the submerged blower 5 provides oxygen for the nitrification of the aerobic zone, which has the following advantages: 1, the noise of the blower is small in water; 2, the heat dissipation of the blower is good in water, which is beneficial to the long-term stable operation of the blower; 3, the heat dissipation of the blower increases the temperature of the water, which is beneficial to the growth of microorganisms in winter; 4, the blower is arranged in the tank body 1, which saves the space of the equipment and is beneficial to the arrangement and installation of other equipment on the upper part of the tank body 1.

[0034] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated domestic sewage treatment system, comprising a horizontal tank, characterized in that, The front end of the tank is provided with at least one set of first aeration devices, and the rear end of the tank is provided with at least one set of membrane modules and second aeration devices; and a pressure difference is formed between the front end and the rear end of the tank through the first aeration devices, membrane modules and second aeration devices, thereby causing the sewage in the tank to flow back and forth from the rear end to the front end. The first aeration device is a disc-type microporous aeration device, the second aeration device is a microporous aeration device; the membrane module is a membrane module with a perforated aeration device; At least two membrane modules are arranged side by side; The microporous aeration device is provided in four parts, two of which are respectively located below the two membrane modules, and the other two are arranged vertically and located at the rear end of the tank.

2. The integrated domestic sewage treatment system according to claim 1, characterized in that, The membrane module includes a membrane frame, a hollow fiber membrane, and a perforated aeration pipe; The membrane frame contains several hollow fiber membranes, which are connected to the water channels on the membrane frame via U-shaped tubes. The perforated aeration pipe is installed at the bottom of the membrane frame and connected to the air passage on the membrane frame, which is connected to a submersible blower.

3. The integrated domestic sewage treatment system according to claim 1, characterized in that, The tank is also equipped with several submersible blowers, which are located between the membrane module and the first aeration device.

4. The integrated domestic sewage treatment system according to claim 3, characterized in that, The submersible fan is provided in units of 1 to 5, arranged in a row.

5. The integrated domestic sewage treatment system according to claim 1, characterized in that, The aeration capacity of the second aeration device and membrane module at the rear end of the tank is greater than that of the first aeration device at the front end.

6. The integrated domestic sewage treatment system according to claim 1, characterized in that, The top of the tank is also equipped with a membrane grid. After the sewage is pretreated by the membrane grid, it extends into the tank through the outlet pipe at the bottom of the membrane grid.

7. The integrated domestic sewage treatment system according to claim 1, characterized in that, The top of the tank is also equipped with a clean water tank, which contains separate carbon source compartments, clean water compartments, and phosphorus removal agent compartments. The hollow fiber membrane inside the tank connects the treated clean water to the clean water compartments via a water pump.

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