Low-temperature-resistant integrated sewage treatment device

Abstract

The utility model discloses a low temperature resistant integrated sewage treatment device, including reactor and heating temperature control component, the reactor includes anaerobic zone, anoxic zone, aerobic zone, settling zone and deep filtration zone that are connected in proper order, the wall surface of settling zone and deep filtration zone includes the sandwich structure of inner wall panel and outer wall panel, an electric tracing band and a heat preservation structure are arranged between the inner wall plate and the outer wall plate, and the electric tracing band is electrically connected with the heating temperature control assembly. The sewage treatment device has the advantages of low-temperature operation resistance and good treatment effect.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a low temperature resistant integrated sewage treatment device. Background Art

[0002] In recent years, with the need to improve the rural living environment and build beautiful villages and the implementation of the rural revitalization strategy, the market prospects for rural domestic sewage treatment are huge.

[0003] In rural domestic sewage treatment, biochemical treatment processes are often used due to its dispersion, irregular discharge, and limited economic conditions. However, biochemical processes are often limited by microbial activity, which is greatly affected by the external ambient temperature. When the water temperature is below 10°C, most of the microorganisms will be in a dormant state with poor activity, affecting the nitrogen and phosphorus removal effects. Therefore, low temperature restricts the treatment effect of rural domestic sewage. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an integrated low-temperature resistant sewage treatment device, which has the advantages of low-temperature resistant operation and good treatment effect.

[0005] The utility model solves the above problems through the following technical means: a low-temperature resistant integrated sewage treatment device, including a reactor and a heating temperature control component, the reactor includes an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone and a deep filtration zone connected in sequence, the wall surface of the sedimentation zone and the deep filtration zone is a sandwich structure including an inner wall plate and an outer wall plate, an electric heating belt and a thermal insulation structure are arranged between the inner wall plate and the outer wall plate, and the electric heating belt is electrically connected to the heating temperature control component.

[0006] Furthermore, the bottoms of the anaerobic zone and the anoxic zone are both provided with aeration and stirring devices, and the bottom of the aerobic zone is provided with an aeration device.

[0007] Furthermore, a nitrification liquid return pipe is connected between the aerobic zone and the anoxic zone, a sludge return pipe is connected between the sedimentation zone and the anaerobic zone, and the nitrification liquid return pipe and the sludge return pipe are both powered by an air stripping device.

[0008] Furthermore, a mud bucket is provided at the bottom of the sedimentation area, and a mud discharge port is provided at the bottom of the mud bucket.

[0009] Furthermore, the sedimentation zone is provided with an air lift and mud discharge device.

[0010] Furthermore, the aeration and stirring device, the aeration device, the air stripping device and the air stripping and mud discharge device are all provided with air sources by a blower.

[0011] Furthermore, MBBR fillers are arranged in the aerobic zone, and filler interception devices are arranged at the liquid inlet and the liquid outlet of the aerobic zone.

[0012] Furthermore, filter material is arranged in the deep filtration area, and the filter material provides backwashing power through a backwash pump.

[0013] Furthermore, it also includes an equipment room, in which a heater, a blower, a backwash pump, an electric control cabinet, an ultraviolet disinfector and a dosing device are installed. The outlet water of the reactor is connected to the ultraviolet disinfector, and the dosing device is connected to the aerobic zone through a phosphorus removal and dosing pipe.

[0014] Beneficial effects of the utility model: The low-temperature resistant integrated sewage treatment device of the present application solves the low-temperature problem by setting up a double protection measure of a heat preservation structure and a heating element. The equipment uses PLC control to realize automatic operation. Its process adopts A 2 The combination of O process and MBBR process improves the efficiency of nitrogen removal and phosphorus removal. It has the advantages of low temperature resistance, good treatment effect, automatic operation and convenient operation. At the same time, it minimizes the insulation and heating coverage area and saves investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural layout diagram of a low-temperature resistant integrated sewage treatment device of the utility model.

[0017] Figure 2 The utility model discloses a heat preservation structure layout diagram of a low temperature resistant integrated sewage treatment device.

[0018] Figure numerals: 1. anaerobic zone; 2. aeration and stirring device; 3. anoxic zone; 4. aerobic zone; 5. aeration device; 6. MBBR filler; 7. electric heating belt; 8. sedimentation zone; 9. deep filtration zone; 10. filter material; 11. water distribution pipe; 12. equipment room; 13. backwash pump; 14. electric control cabinet; 15. dosing device; 16. sludge return pipe; 17. nitrification liquid return pipe; 18. filler interception device; 19. air lift device; 20. phosphorus removal dosing pipe; 21. ultraviolet disinfector; 22. blower; 23. inner wall panel; 24. insulation structure; 25. outer wall panel. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more specific. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0020] like Figure 1 to Figure 2As shown, the low temperature resistant integrated sewage treatment device of this embodiment includes a reactor, a heating and temperature control component and an equipment room 12. The reactor includes an anaerobic zone 1, an anoxic zone 3, an aerobic zone 4, a sedimentation zone 8 and a deep filtration zone 9 connected in sequence. The wall surface of the sedimentation zone and the deep filtration zone is a sandwich structure including an inner wall plate 23 and an outer wall plate 25. An electric heating belt 7 and a heat preservation structure 24 are arranged between the inner wall plate and the outer wall plate. The electric heating belt is electrically connected to the heating and temperature control component. A heater, a blower 22, a backwash pump, an electric control cabinet, an ultraviolet disinfector 21 and a dosing device are arranged in the equipment room. The outlet water of the reactor is connected to the ultraviolet disinfector, and the outlet water is discharged after disinfection; the dosing device is connected to the aerobic zone through a phosphorus removal dosing pipe 20.

[0021] The electric control cabinet 14 includes a PLC and a touch screen, etc. The touch screen displays and controls data for the automated operation of the sewage treatment device.

[0022] The anaerobic zone 1 and the anoxic zone 3 are separated by a partition and connected at the bottom. The anoxic zone 3 and the aerobic zone 4 are connected by overflow. The aerobic zone 4 and the sedimentation zone 8 are connected by a flow pipe. The sedimentation zone 8 and the deep filtration zone 9 are connected by an overflow tank.

[0023] A nitrification liquid return pipe 17 is connected between the aerobic zone 4 and the anoxic zone 3, and the nitrification liquid returns from the aerobic zone 4 to the anoxic zone 3. A sludge return pipe 16 is connected between the sedimentation zone 8 and the anaerobic zone 1, and the sludge mixed liquid returns from the sedimentation zone 8 to the anaerobic zone 1. The nitrification liquid return pipe and the sludge return pipe are both powered by an air stripping device 19.

[0024] An aeration and stirring device 2 is provided at the bottom of the anaerobic zone 1 and the anoxic zone 3 for aeration and stirring to increase dissolved oxygen, and the two are controlled separately.

[0025] The aerobic zone 4 is provided with an aeration device 5 and an MBBR filler 6. The liquid inlet and the liquid outlet of the aerobic zone are both provided with a filler interception device 18. The aeration device 5 is arranged at the bottom of the aerobic zone. The aeration device 5 is composed of an aeration plate and a pipeline, which is used for aeration and can prevent freezing. The MBBR filler is made of one of polyurethane and PE, with a filling rate of 20% to 50%, and is used to increase the biomass of the aerobic zone and enhance the efficiency of nitrogen removal and phosphorus removal.

[0026] A mud bucket is provided at the bottom of the sedimentation area 8. The mud bucket is a conical structure, and a mud discharge port is provided at the bottom of the mud bucket for regular mud discharge. An air lift mud discharge device is provided in the sedimentation area.

[0027] The deep filtration area 9 is provided with filter material 10, and the filter material 10 is backwashed by water, and a backwash pump 13 is used to provide backwashing power. The backwash pump 13 draws water from the upper clear water area of ​​the deep filtration area 9 to backwash the filter material 10 in the deep filtration area, and the backwash water is discharged from the bottom of the deep filtration area 9. A water distribution pipe 11 for distributing backwash water is provided at the bottom of the deep filtration area.

[0028] Since the anaerobic zone 1, the anoxic zone 3, and the aerobic zone 4 are all aerated and stirred, the wastewater is in flow, and the aerobic zone 4 can flow back to the anoxic zone 3, and the sedimentation zone 8 can flow back to the anaerobic zone 1. Therefore, it is only necessary to heat the sedimentation zone 8 and the deep filtration zone 9, and the water temperature of the entire reactor can be heated by reflux, aeration, etc., to prevent freezing, while saving energy consumption and investment. In this embodiment, the wall surface of the sedimentation zone and the deep filtration zone is a sandwich structure, and an electric heating belt and a thermal insulation structure are arranged in the sandwich. The thermal insulation structure is thermal insulation cotton, and the electric heating belt 7 is used to heat the equipment, and the thermal insulation structure 24 is used to keep the equipment warm.

[0029] The heating temperature control component includes a thermostat, a temperature sensor and a temperature control box. The temperature is adjusted and controlled by the thermostat and the temperature control box. The temperature sensor displays the water temperature. The minimum temperature of the temperature sensor is set to 5°C. When the water temperature is lower than this temperature, heating begins. The maximum temperature of the temperature sensor is set to 12°C. When the water temperature reaches this temperature, heating stops. The heating start and stop of the electric heating tape is controlled by the temperature sensor signal through the PLC, which prevents the equipment from freezing due to excessively low water temperature while ensuring the activity of microorganisms and improving the sewage treatment effect.

[0030] The blower 22 is connected to the aeration stirring device 2 in the anaerobic zone and the anoxic zone, the aeration device 5 in the aerobic zone 4, the air stripping device 19 in the nitrification liquid return pipe 17 and the sludge return pipe 16, and the air stripping sludge discharge device in the sedimentation zone 8 through pipelines for supplying oxygen or power.

[0031] The heater is started in winter to increase the temperature of the equipment room 12 and prevent the blower 22 from being damaged by sucking in cold air.

[0032] The backwash pump 13 used for backwashing the deep filtration area 9 is arranged in the equipment room 12. In order to prevent the pump from freezing in winter, the pump and the pipes before and after the pump are insulated. At the same time, the water in the pump is drained after each backwash in winter.

[0033] The electric control cabinet 14 automatically controls the blower 22, the backwash pump 13, the dosing device 15, the heating and temperature control components, etc., and performs data exchange. At the same time, the data can be displayed and controlled through the touch screen to realize automatic control operation.

[0034] The low temperature resistant integrated sewage treatment device is used in cold areas in the north.

[0035] Example 1

[0036] The scale of domestic sewage treatment in a cold region is 100m3 / d. The integrated equipment (including equipment room) occupies 27m2. The fan, backwash pump, ultraviolet disinfector, dosing device, electric control cabinet, temperature control box, etc. are placed in the equipment room. The sewage treatment adopts A2O-MBBR process. The size of the integrated sewage treatment equipment is 8900×3000×3000m. The material is carbon steel anti-corrosion. The total power is 8.5kW, of which the heating power is 5kW and the power of other equipment is 3.5kW. After being treated by the integrated equipment, the winter effluent water quality indicators are: COD is 13mg / L, BOD5 is 4mg / L, SS is 6.4mg / L, ammonia nitrogen is 1.59mg / L, total nitrogen is 14.5mg / L, total phosphorus is 0.31mg / L, pH is 7.3, and the number of fecal coliform bacteria is 569 / L. The effluent stably reaches the Class A standard of "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002).

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A low temperature resistant integrated sewage treatment device, characterized in that: It includes a reactor and a heating and temperature control component. The reactor includes an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone and a deep filtration zone which are connected in sequence. The wall surfaces of the sedimentation zone and the deep filtration zone are sandwich structures including inner wall panels and outer wall panels. An electric heating tape and a heat preservation structure are arranged between the inner wall panels and the outer wall panels. The electric heating tape is electrically connected to the heating and temperature control component.

2. The low temperature resistant integrated sewage treatment device according to claim 1 is characterized in that: The bottoms of the anaerobic zone and the anoxic zone are both provided with aeration and stirring devices, and the bottom of the aerobic zone is provided with an aeration device.

3. The low temperature resistant integrated sewage treatment device according to claim 2 is characterized in that: A nitrification liquid return pipe is connected between the aerobic zone and the anoxic zone, a sludge return pipe is connected between the sedimentation zone and the anaerobic zone, and the nitrification liquid return pipe and the sludge return pipe are both powered by an air stripping device.

4. The low temperature resistant integrated sewage treatment device according to claim 3 is characterized in that: A mud bucket is arranged at the bottom of the sedimentation area, and a mud discharge port is arranged at the bottom of the mud bucket.

5. The low temperature resistant integrated sewage treatment device according to claim 4 is characterized in that: The sedimentation zone is provided with an air lift and mud discharge device.

6. The low temperature resistant integrated sewage treatment device according to claim 5 is characterized in that: The aeration and stirring device, the aeration device, the air stripping device and the air stripping and mud discharge device are all provided with air sources by a blower.

7. The low temperature resistant integrated sewage treatment device according to claim 6 is characterized in that: MBBR fillers are arranged in the aerobic zone, and filler interception devices are arranged at the liquid inlet and the liquid outlet of the aerobic zone.

8. The low temperature resistant integrated sewage treatment device according to claim 7 is characterized in that: The deep filtration area is provided with filter material, and the filter material is provided with backwashing power through a backwashing pump.

9. The low temperature resistant integrated sewage treatment device according to claim 8, characterized in that: It also includes an equipment room, in which a heater, a blower, a backwash pump, an electric control cabinet, an ultraviolet disinfector and a dosing device are arranged. The outlet water of the reactor is connected to the ultraviolet disinfector, and the dosing device is connected to the aerobic zone through a dephosphorization dosing pipe.

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