Overground MBR (Membrane Biological Reactor) integrated domestic sewage treatment equipment

Abstract

The utility model discloses overground MBR (Membrane Biological Reactor) integrated domestic sewage treatment equipment which comprises an equipment heat-insulating shell and domestic sewage treatment equipment arranged in the equipment heat-insulating shell, and the equipment heat-insulating shell comprises an equipment base layer shell, an equipment heat-insulating layer and an equipment protective layer which are sequentially arranged from inside to outside; a plurality of electric tracing bands are uniformly attached to the outer wall of the equipment base layer shell; the domestic sewage treatment equipment comprises an anaerobic tank, an anoxic tank, an aerobic tank, an MBR (Membrane Bioreactor) tank, a water producing tank and a sludge tank which are connected in sequence. The integrated sewage treatment equipment can effectively solve the problem that the existing integrated sewage treatment equipment cannot be suitable for being used in a low-temperature environment on the ground.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment and relates to an above-ground MBR integrated domestic sewage treatment device. Background Art

[0002] Domestic sewage mainly comes from cooking in the kitchen, bathing, washing and flushing the toilet, etc. Domestic sewage usually contains mud, grease, soap, fruit cores, paper scraps, food scraps, germs, debris and feces and urine, etc. Compared with industrial wastewater, the water quality of domestic sewage is generally more stable, the concentration is lower, and it is easier to treat by biochemical methods. Generally, the scale of water treatment stations or equipment is selected according to the amount of water. For hospitals, residential areas, factories, highway service areas and other working conditions with small daily processing volume, integrated treatment equipment can be selected.

[0003] The processes used in common integrated domestic sewage treatment equipment include SBR process, biological contact oxidation process, AO+MBR process, etc. Among them, the integrated water treatment equipment using AO+MBR process is a membrane bioreactor (MBR) with high-efficiency nitrogen and phosphorus removal. It is an improvement on the intermittent control of the membrane bioreactor, integrating anoxic, aerobic and membrane filtration. It can achieve precise anoxic and aerobic process control while maintaining high-concentration activated sludge, making MBR have more excellent nitrogen and phosphorus removal effects, and higher removal efficiency for COD, TP and NH3-N.

[0004] However, the use of integrated sewage treatment equipment is often affected by various factors. Most of them use buried equipment. If, under certain needs, the buried equipment is placed directly on the ground in the face of more complex environments and usage conditions on the ground, it is obviously unable to meet normal use needs, such as large temperature differences on the ground and the possibility of freezing in low temperatures in winter. Utility Model Content

[0005] The utility model aims to provide an above-ground MBR integrated domestic sewage treatment equipment to solve the problem that the existing underground integrated sewage treatment equipment cannot be adapted to be used in a low-temperature environment on the ground.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An above-ground MBR integrated domestic sewage treatment equipment comprises an equipment insulation shell and sewage treatment equipment arranged therein, wherein the equipment insulation shell comprises an equipment base shell, an equipment insulation layer and an equipment protection layer arranged in sequence from the inside to the outside; a plurality of electric heating tapes are evenly attached to the outer wall of the equipment base shell; the sewage treatment equipment comprises an anaerobic tank, an anoxic tank, an aerobic tank, an MBR tank, a water production tank and a sludge tank connected in sequence.

[0008] Furthermore, the thermal insulation layer of the equipment is a rock wool layer with a thickness of 10-20 cm.

[0009] Furthermore, the equipment insulation layer and the equipment base shell are of equal height, and the equipment protection layer 11 is at least 50 cm higher than the equipment base shell.

[0010] Furthermore, a telescopic staircase is provided on the outer wall of the equipment protection layer.

[0011] Furthermore, a foldable guardrail is provided on the inner side of the equipment protection layer.

[0012] Furthermore, it also includes an equipment room, in which a blower, an MBR suction pump, an MBR cleaning solution box, an MBR cleaning dosing pump, an ultraviolet disinfection device, a PLC control box, an inlet flow meter, an outlet flow meter and a display terminal are installed.

[0013] Furthermore, it also includes the following devices for connecting to the PLC control box: a water pump for lifting sewage into the anaerobic tank, a temperature sensor installed in the anaerobic tank for monitoring the incoming water temperature, a dissolved oxygen analyzer installed in the aerobic tank, an ultrasonic level meter installed in the MBR tank for detecting the liquid level, and a sludge return pump installed on the MBR tank toward the anaerobic tank.

[0014] Furthermore, aeration pipes connected to blowers are provided in the anoxic tank, the aerobic tank and the MBR tank.

[0015] Furthermore, the water production pool and the sludge pool are suspended together in the equipment room.

[0016] Furthermore, an overflow port is provided on the water production pool, and the overflow port is connected to an external discharge pipe, and an ultraviolet disinfection device is provided on the pipe.

[0017] The integrated domestic sewage treatment equipment of this utility model fully considers the different use environments faced by underground equipment and above-ground equipment, and carries out targeted design for the special environment faced by above-ground equipment, so as to ensure the normal use of the integrated equipment and ensure that the effluent water quality meets the standards. Its beneficial effects mainly include the following points:

[0018] 1. An electric heating tape is added to the outer surface of the equipment base shell, and an insulation layer and a protective layer are arranged in sequence, which can effectively solve the problem that the existing underground integrated sewage treatment equipment cannot adapt to the low temperature environment on the ground.

[0019] 2. An appropriate electric heating device is installed in the base shell of the equipment according to the size of the equipment. When the ambient temperature is lower than 5 degrees Celsius, the electric heating tape 9 can be automatically turned on through the program of the PLC control box, so as to ensure that the water to be treated is kept in a suitable temperature range, and that it does not freeze and the sludge is active. At the same time, an insulation layer is set up to effectively reduce the heat transfer of the equipment, so as to ensure that the sewage in the equipment will not freeze and lose its activity due to low temperature in winter, and the activated sludge will not die due to high temperature in summer. The internal temperature sensor can transmit the water temperature to the central control in real time, and realize the automatic switch of the electric heating in combination with the automatic control of the upper computer, reducing the workload of manual operation. Finally, the equipment protection layer outside the equipment insulation layer plays two roles. One is to protect the equipment insulation layer, and the other is to achieve the appearance decoration of the equipment by selecting different materials or colors, so as to meet the aesthetic requirements.

[0020] 3. Hidden railings (railings that can be folded down) are added to the inner side of the equipment protection layer, and telescopic stairs are added to the side. During overhaul or daily maintenance of ground-mounted integrated equipment, personnel need to go to the top for operation or inspection. Therefore, in order to ensure the safety of personnel and considering the aesthetic requirements of ground-mounted equipment, hidden railings and telescopic stairs are set. The hidden railings can be folded down when not in use, so that they are hidden behind the parapet of the equipment, ensuring the overall aesthetics of the equipment. Similarly, the telescopic stairs can be stored at the top of the equipment when not in use, which can increase the passability around the bottom of the equipment while ensuring a good appearance.

[0021] 3. A suspended water production pool and sludge pool are set at the rear end of the MBR pool. The water production pool is used to store clean water after MBR membrane filtration, while the sludge pool is used to store excess activated sludge. The two are set in a suspended position on the upper part of the integrated equipment. On the one hand, it can improve the internal space utilization of the equipment, and on the other hand, it can increase the drainage and sludge pressure, realize natural sludge drainage under certain conditions, reduce the use of water pumps, and reduce energy consumption. At the same time, in order to ensure that the sludge discharge pipeline is not blocked by sludge during natural sludge discharge, high-pressure gas is introduced into the sludge discharge pipeline. After each sludge discharge is completed, the sludge discharge pipeline is purged with compressed gas to ensure the normal use of the sludge discharge pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a plan view of the internal structure of the equipment of the utility model;

[0023] Figure 2 It is a structural diagram of domestic sewage treatment equipment;

[0024] Figure 3 It corresponds to Figure 1 Middle AA section;

[0025] Figure 4It corresponds to Figure 1 Middle BB section;

[0026] Figure 5 It corresponds to Figure 1 Middle CC section;

[0027] Figure 6 It is a front view of the device of the utility model.

[0028] In the figure, 1. anaerobic tank, 2. anoxic tank, 3. aerobic tank, 4. MBR tank, 5. water production tank, 6. sludge tank, 7. equipment room, 8. equipment base shell, 9. electric heating tape, 10. equipment insulation layer, 11. equipment protection layer, 12. telescopic stairs. DETAILED DESCRIPTION

[0029] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0030] like Figure 1 , 2 As shown, the above-ground MBR integrated domestic sewage treatment equipment provided by the utility model includes an equipment insulation shell and a domestic sewage treatment equipment arranged therein, and the domestic sewage treatment equipment includes an anaerobic tank 1, an anoxic tank 2, an aerobic tank 3, an MBR tank 4, a water production tank 5, a sludge tank 6 and an equipment room 7 connected in sequence.

[0031] First, domestic sewage is filtered from a septic tank or a water collection tank and then lifted to the anaerobic tank 1 by a water pump. In the anaerobic tank 1, the organic matter in the sewage is decomposed by anaerobic bacteria, which is convenient for subsequent further treatment. In the present utility model, in order to facilitate inspection, an observation port is set on the top of the anaerobic tank 1. At the same time, considering the influence of the ambient temperature on the ground, a temperature sensor is set in the anaerobic tank 1, and its signal is uploaded to the PLC control box in the equipment room 7, which can monitor the incoming water temperature in real time.

[0032] After the initial decomposition of organic matter in the anaerobic tank 1, the sewage enters the anoxic tank 2 through the upper overflow port of the anaerobic tank 1. In the anoxic tank 2, the nitrite and nitrate in the sewage are converted into nitrogen gas through the metabolism of denitrifying bacteria, thereby achieving the purpose of biological denitrification. In order to ensure that the oxygen content in the anoxic tank 2 meets the anoxic condition, an aeration pipe is set in the anoxic tank 2, and aeration is performed by a blower, and the aeration amount is adjusted by the valve at the front end of the aeration pipe. Similarly, in order to facilitate inspections, especially to observe the aeration conditions of the anoxic tank, an observation port is set at the top of the anoxic tank 2.

[0033] Sewage enters aerobic pool 3 through the water passage at the bottom of anoxic pool 2. In aerobic pool 3, ammonia nitrogen in sewage is nitrified by the action of aerobic bacteria, and organic matter is further degraded. A large number of aeration pipes are arranged in aerobic pool 3, and aeration is performed by a blower to achieve the oxygen consumption conditions for the survival of aerobic bacteria. In order to more accurately grasp the oxygen content of aerobic pool 3, a dissolved oxygen analyzer is arranged in aerobic pool 3, and the measured dissolved oxygen data is uploaded to the PLC central control system to realize real-time monitoring of the oxygen content of aerobic pool 3. In the utility model, the dissolved oxygen in aerobic pool 3 is preferably maintained at 2-3 mg / l, more preferably 2.5-3 mg / l. Similarly, in order to facilitate inspections, especially to observe the aeration conditions of aerobic pool 3, an observation port is set at the top of aerobic pool 3.

[0034] Sewage enters the MBR pool 4 through the overflow port at the top of the aerobic pool 3. A suitable number of flat membranes are set in the MBR pool 4 according to the amount of sewage treatment, and the solid-liquid separation is achieved by the filtering effect of the flat membrane. At the same time, the activated sludge with a higher concentration in the MBR pool 4 is used to further achieve the degradation of organic matter and the nitrification of ammonia nitrogen, and finally achieve the purification of sewage. In order to ensure the normal use of the MBR membrane, an aeration pipeline is set in the MBR pool 4 for aeration. In the utility model, a sludge return pump is set in the MBR pool to pump the activated sludge in the MBR pool to the front anaerobic pool to achieve sludge return and increase the overall sludge concentration in the equipment. At the same time, in order to facilitate the observation of the aeration condition of the membrane pool and the offline cleaning and maintenance of the MBR membrane, an equipment hole is set on the upper part of the membrane pool. Finally, as the last treatment stage of the equipment water treatment of the utility model, an ultrasonic level meter is set in the MBR pool 4, and the liquid level data of the MBR pool 4 is uploaded to the central control system as one of the bases for the automatic operation of the MBR water production pump.

[0035] The MBR water production pump is located in the equipment room 7. Its main function is to force the sewage in the MBR pool 4 to pass through the MBR membrane filtration and enter the water production pool 5 through the suction action of the MBR water production pump. The water production pool 5 is located at the rear end of the equipment and is suspended in the equipment room 7. Its main function is to temporarily store the water produced after being filtered by the MBR membrane. An overflow port is set on the water production pool 5. When the water level in the pool reaches the liquid level, it is discharged through the overflow port through the pipeline. An ultraviolet disinfection device is set on the pipeline, which disinfects and sterilizes the external drainage and finally discharges it from the equipment.

[0036] The sludge pool 6 is also suspended in the equipment room 7, adjacent to the MBR pool 4 and the water production pool 5. Its main function is to store the excess activated sludge in the MBR pool 4 and discharge the sludge in time. It is connected to the MBR pool 4 by a channel. In the utility model, the sludge content is judged by the sludge settling ratio. When the sludge settling ratio in the MBR pool 4 exceeds 40, it is considered that the sludge content is high, and the sludge discharge valve on the sludge pool 6 can be opened to discharge the sludge. In the utility model, a high-pressure gas purge mechanism is introduced on the sludge discharge pipeline. The high-pressure gas on the blower is introduced into the sludge discharge pipeline through the pipeline. After each sludge discharge, the pipeline is purged by high-pressure gas to prevent the sludge discharge pipeline from being blocked due to sludge retention.

[0037] Equipment room 7 is located at the rear end of the equipment and is equipped with a door for people and equipment to enter and exit. The main equipment in equipment room 7 includes blowers, MBR suction pumps, MBR cleaning solution tanks, MBR cleaning dosing pumps, ultraviolet disinfection devices, PLC control boxes, inlet flow meters, outlet flow meters, and local display terminals for instruments such as anaerobic tank thermometers, MBR tank level gauges, and aerobic tank dissolved oxygen analyzers. Among them, the MBR cleaning solution tank and MBR cleaning dosing pump are used for offline membrane washing and dosing of MBR; the inlet flow meter and outlet flow meter are used to monitor the real-time flow of the equipment's inlet and outlet water and to count the cumulative flow; the PLC control box is used to realize and control the power consumption and automation functions of the entire equipment. Other equipment has been explained before and will not be repeated here.

[0038] In this utility model, the appearance of the equipment is specially designed to cope with the special use environment on the ground. Figure 2 , Figure 3 , Figure 4 and Figure 5 In the figure, the equipment insulation shell includes an equipment base shell 8, an equipment insulation layer 10 and an equipment protection layer 11 which are arranged in sequence from the inside to the outside; wherein, the equipment base shell 8 is also the outer wall of the pool, and its material is preferably carbon steel, and more preferably stainless steel; a plurality of electric heating tapes / sheets 9 are evenly attached to the outer surface of the equipment base shell 8, and according to the equipment capacity and the use environment, after calculation, the required number of electric heating tapes (sheets) are arranged; the equipment insulation layer 10 is preferably rock wool insulation, and the preferred thickness is 10 cm, and more preferably 15-20 cm, which should be determined after calculation under special conditions; the equipment protection layer 11 is a decorative layer and a fixed layer located on the outermost layer, and can be made of steel plates, aluminum-plastic plates, stainless steel and other materials according to actual needs.

[0039] like Figure 6The figure shows the front view of the equipment of the utility model. According to the actual use conditions, a telescopic staircase 12 is provided on the outer wall of the equipment protection layer 11, and it is avoided to be set on the side with the door of the equipment room 7 as much as possible. The height of the equipment protection layer 11 should be more than 50 cm greater than the height of the equipment insulation layer 10 and the equipment base shell 8, thereby forming the parapet of the equipment. A foldable guardrail is provided on the inner side of the equipment protection layer 11. When there is someone on the top of the equipment, the railing is pulled up for protection. When not in use, it is put down and hidden behind the equipment parapet to ensure the overall appearance of the equipment.

[0040] Example 1

[0041] The designed water treatment capacity of domestic sewage at a certain station is 12m 3 / d, using ground MBR integrated sewage treatment equipment. According to its treatment capacity and the actual site conditions, the overall size of the equipment is determined as follows: 2500mm×5000mm×2800mm; the size of the anaerobic tank and the anoxic tank is 800mm×800mm×2800mm; the size of the aerobic tank is 900mm×2300mm×2800mm; the size of the MBR pool is 1500mm×1600mm×2800mm; the size of the equipment room is 2700mm×2500mm×2800mm; the size of the sludge tank and the water production tank is 1250mm×1000mm×1300mm; the membrane area of ​​the MBR pool is 50㎡; the total power of the electric heating belt of the equipment is 3.5kW; the insulation layer adopts a 100mm thick rock wool insulation layer; the decorative layer adopts a 4mm thick aluminum-plastic plate, which is 50cm higher than the box body to form a parapet. A retractable staircase is set on the south side of the equipment. The equipment is located in an environment with a temperature range of -10℃ to 15℃. The electric heating is turned on for three hours and off for 0.5 hours. During this period, the water temperature in the equipment is always maintained at around 15℃, and there is no freezing, which well meets the needs of sewage treatment. In terms of water quality, when the inlet COD is 52mg / l, the inlet ammonia nitrogen is 9.6mg / l, and the inlet suspended solids is 54mg / l, the outlet COD is 8mg / l, the outlet ammonia nitrogen is 3.6mg / l, and the outlet suspended solids is 3.2mg / l, which meets the outlet water quality index requirements.

Claims

1. An above-ground MBR integrated domestic sewage treatment equipment, characterized in that: The invention comprises an equipment heat-insulating shell and sewage treatment equipment arranged therein, wherein the equipment heat-insulating shell comprises an equipment base shell (8), an equipment heat-insulating layer (10) and an equipment protective layer (11) arranged in sequence from the inside to the outside; a plurality of electric heating cables (9) are evenly attached to the outer wall of the equipment base shell (8); the sewage treatment equipment comprises an anaerobic tank (1), an anoxic tank (2), an aerobic tank (3), an MBR tank (4), a water production tank (5) and a sludge tank (6) connected in sequence; Aeration pipes connected to blowers are provided in the anoxic tank (2), the aerobic tank (3) and the MBR tank (4); sewage enters the anoxic tank (2) through the upper overflow port of the anaerobic tank (1); an aeration pipe is provided in the anoxic tank (2), and an observation port is provided at the top of the anoxic tank (2); The sewage enters the aerobic tank (3) through the water passage at the bottom of the anoxic tank (2); an aeration pipeline and a dissolved oxygen analyzer are arranged in the aerobic tank (3), and the dissolved oxygen in the aerobic tank (3) is maintained at 2-3 mg / l; an observation port is arranged at the top of the aerobic tank (3); The sewage enters the MBR pool (4) through the overflow port at the top of the aerobic pool (3); a flat membrane is arranged in the MBR pool (4), and an aeration pipe is arranged for aeration; a sludge return pump is arranged in the MBR pool (4), and an equipment hole is arranged on the upper part of the membrane pool; an ultrasonic level meter is arranged in the MBR pool (4); The water production pool 5 is suspended in the equipment room (7), and an overflow port is provided on the water production pool (5) for discharging the water in the pool through the overflow port through a pipeline after the water level reaches the liquid level. An ultraviolet disinfection device is provided on the pipeline; The sludge pool (6) is suspended in the equipment room (7), a sludge discharge valve is provided on the sludge pool (6) for discharging sludge, and a high-pressure gas purge mechanism is introduced on the sludge discharge pipeline; The invention also comprises the following devices for connecting to a PLC control box: a water pump for lifting sewage into the anaerobic tank (1), a temperature sensor arranged in the anaerobic tank (1) for monitoring the incoming water temperature, a dissolved oxygen analyzer arranged in the aerobic tank (3), an ultrasonic level meter arranged in the MBR tank (4) for detecting the liquid level, and a sludge return pump arranged on the MBR tank (4) toward the anaerobic tank (1).

2. The above-ground MBR integrated domestic sewage treatment equipment according to claim 1, characterized in that: The equipment insulation layer (10) is a rock wool layer with a thickness of 10-20 cm.

3. The above-ground MBR integrated domestic sewage treatment equipment according to claim 1, characterized in that: The equipment insulation layer (10) and the equipment base shell (8) are of equal height, and the equipment protection layer (11) is at least 50 cm higher than the equipment base shell (8).

4. The above-ground MBR integrated domestic sewage treatment equipment according to claim 1, characterized in that: A telescopic staircase (12) is provided on the outer wall of the equipment protection layer (11).

5. The above-ground MBR integrated domestic sewage treatment equipment according to claim 1, characterized in that: A foldable guardrail is arranged inside the equipment protection layer (11).

6. The above-ground MBR integrated domestic sewage treatment equipment according to any one of claims 1 to 5, characterized in that: It also includes an equipment room (7), in which a blower, an MBR suction pump, an MBR cleaning solution tank, an MBR cleaning dosing pump, an ultraviolet disinfection device, a PLC control box, an inlet flow meter, an outlet flow meter and a display terminal are arranged.

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