Sewage treatment station matched with VOCs waste gas collection system

Abstract

The utility model discloses a sewage treatment station matched with a VOCs waste gas collecting system, which comprises an aerobic bioreactor, aeration equipment and other sewage treatment devices, the aeration equipment is used for supplying air to the aerobic bioreactor, and sealing cover plates are mounted at the tops of the aerobic bioreactor and the other sewage treatment devices. First air pipes are arranged on the sealing cover plates and connected with air conveying pipes; second gas pipes are also arranged on the top sealing cover plates of the other sewage treatment devices and are connected with a gas collecting header pipe. The device can be used for treating factory sewage in industries such as printing and dyeing, plastic film printing, chemical production and the like, and effectively collecting unorganized VOCs waste gas generated by a sewage treatment device at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment and volatile organic compounds (VOCs) collection technical field, specifically related to a sewage treatment station of supporting set VOCs waste gas collection system. BACKGROUND

[0002] Toluene, benzene, ethyl acetate and other VOCs waste gas can cause significant harm to the human body, can destroy the nervous system, liver and respiratory system of the human body, and cause body damage. Not only that, VOCs also have a certain impact on the atmospheric environment, can cause the increase of organic aerosol and ozone concentration in the troposphere, trigger photochemical smog phenomenon, and cause serious impact on the surrounding environment and human health. In recent years, more common photochemical smog and other phenomena are usually caused by a large number of VOCs and nitrogen oxides (NO x ) emitted by industrial production and motor vehicles. Therefore, the collection and treatment of VOCs need to be paid special attention.

[0003] The patent specification with publication number CN218608813U discloses a sewage station waste gas treatment system, which comprises an alkali washing tower, a gas heater, a high-efficiency biological filter bed, a draft fan and an exhaust cylinder. The alkali washing tower is used to remove acidic gases and water-soluble gases such as ammonia, alcohol and ketone gas, so as to achieve the pretreatment of the sewage station waste gas. The high-efficiency biological filter bed is used to remove VOCs gas, and the draft fan and the exhaust cylinder are used for standard emission. The system has the advantages of low operation cost and good effect.

[0004] The above-mentioned patent technology treats the sewage station waste gas through a combined process, thereby improving the harmful gas degradation efficiency. However, in actual production, the VOCs gas released by the sewage station is usually difficult to collect, and the preconditions for effectively treating the VOCs waste gas are not well solved. UTILITY MODEL CONTENT

[0005] The utility model provides a sewage treatment station of supporting set VOCs waste gas collection system can be used for the factory area sewage treatment of printing and dyeing, plastic film printing, chemical industry production and other industries, and effectively collects the unorganized VOCs waste gas generated by the sewage treatment device.

[0006] The specific technical scheme is as follows:

[0007] A sewage treatment station of supporting set VOCs waste gas collection system, comprising an aerobic bioreactor, an aeration device and other sewage treatment devices, the aeration device is used for supplying gas for the aerobic bioreactor, the top of the aerobic bioreactor and the other sewage treatment devices is installed with a sealing cover plate, a first gas pipe is arranged on the sealing cover plate, and the first gas pipe is connected with a gas conveying pipe;

[0008] The second air pipe is arranged on the top sealing cover plate of the other sewage treatment device.

[0009] The sewage treatment station with the VOCs waste gas collection system can prevent the VOCs generated by the aerobic biological reactor and the other sewage treatment device from escaping. The aerobic biological reactor has an aeration process, which can be used to provide dissolved oxygen for the aerobic biological reactor and power for collecting the VOCs waste gas generated by the sewage in the aerobic biological reactor and the other sewage treatment device. The aeration process can continuously supplement air into the aerobic biological reactor. The first air pipe on the top sealing cover plate of the other sewage treatment device serves as an air inlet pipe, and the first air pipe on the top sealing cover plate of the aerobic biological reactor serves as an air outlet pipe, which leads out the gas generated by the aeration process in the aerobic biological reactor. The gas enters the other sewage treatment device through the air conveying pipe and the air inlet pipe and carries the VOCs waste gas generated by the other sewage treatment device into the gas collecting main pipe. The gas collecting main pipe can be connected to a VOCs treatment device to treat the VOCs waste gas discharged from the sewage treatment station.

[0010] The other sewage treatment device of the sewage treatment station with the VOCs waste gas collection system can include one or more combinations of a grid well, a primary sedimentation tank, an anaerobic biological reactor, and a secondary sedimentation tank.

[0011] The grid well can be used to filter coarse suspended solids and floating matter in the sewage. Further, a grid machine can be arranged in the grid well.

[0012] The primary sedimentation tank can be used to preliminarily remove fine particulate matter and reduce the subsequent treatment load.

[0013] In some embodiments, the anaerobic biological reactor can be an upflow anaerobic sludge bed (UASB). The upflow anaerobic sludge bed can remove a higher concentration of COD.

[0014] The secondary sedimentation tank can be used to remove sludge and other precipitates in the effluent from the previous stage process, reduce the turbidity of the effluent, and discharge the effluent if it meets the standards.

[0015] In some embodiments, the sewage treatment station with the VOCs waste gas collection system includes a grid well, a primary sedimentation tank, an anaerobic biological reactor, and a secondary sedimentation tank, and the grid well, the primary sedimentation tank, the anaerobic biological reactor, the aerobic biological reactor, and the secondary sedimentation tank are connected in sequence. The grid well, the primary sedimentation tank, the anaerobic biological reactor, the aerobic biological reactor, and the secondary sedimentation tank can be connected by pipelines, and water pumps can be installed between these structures as necessary to pump the sewage. In some embodiments, the bottom of the primary sedimentation tank, the anaerobic biological reactor, and the secondary sedimentation tank can be provided with a sludge collection pipe, which can be connected to a sludge main pipe to facilitate subsequent sludge treatment.

[0016] The sewage treatment station matched with the VOCs waste gas collecting system, the aeration equipment can include a blower and an aeration pipe, the blower is connected with the aeration pipe, and the aeration pipe is provided with air distribution holes located at the bottom of the aerobic biological reactor.

[0017] The sewage treatment station matched with the VOCs waste gas collecting system, the aerobic biological reactor can be a contact oxidation tank.

[0018] The sewage treatment station matched with the VOCs waste gas collecting system, the gas collecting main pipe can be connected with the VOCs treatment equipment.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] The utility model only needs to simply transform the matched sewage treatment station of the factory area to realize the high-efficiency collection of unorganized VOCs of the sewage treatment station, thereby improving the unorganized VOCs collection rate, having technical benefits, the collection power comes from the aerator used in the aeration process, and does not excessively increase the additional power cost, thereby saving the cost, having economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 、 Figure 2 It is a structure schematic view of a sewage treatment station matched with a VOCs waste gas collecting system in the specific embodiment;

[0022] In the figure: 1 - inlet pipe; 2 - grid well; 3 - water pump; 4 - connecting pipeline; 5 - primary sedimentation tank; 6 - anaerobic biological reactor; 7 - air distribution hole; 8 - aerobic biological reactor; 9 - aeration pipe; 10 - secondary sedimentation tank; 11 - discharge pipe; 12 - sludge main pipe; 13 - sludge collecting pipe; 14 - blower; 15 - sealing cover plate I; 16 - sealing cover plate II; 17 - sealing cover plate III; 18 - sealing cover plate IV; 19 - gas conveying pipe; 20 - sealing cover plate V; 21 - gas collecting main pipe. SPECIFIC EMBODIMENT

[0023] The utility model is further described below in combination with the drawings and specific embodiments. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model.

[0024] In the utility model, the terms such as 'connection', 'installation' and 'provided with' should be understood in a broad sense, can be fixed connection, can be detachable connection, can be rigid connection, can be flexible connection, and the person skilled in the art can understand the meaning of the above terms in the utility model according to the specific situation.

[0025] Referring to Figure 1 、 Figure 2The sewage treatment station with a VOCs exhaust gas collecting system comprises an aeration device and a grid well 2, a primary sedimentation tank 5, an anaerobic biological reactor 6, an aerobic biological reactor 8 and a secondary sedimentation tank 10 connected in sequence.

[0026] The aeration device is used for supplying air to the aerobic biological reactor 8. The aeration device comprises a blower 14 and an aeration pipe 9, the blower 14 is connected to the aeration pipe 9 and can continuously supply air, and the aeration pipe 9 is provided with air distribution holes 7 located at the bottom of the aerobic biological reactor 8.

[0027] The grid well 2, the primary sedimentation tank 5, the anaerobic biological reactor 6, the aerobic biological reactor 8 and the secondary sedimentation tank 10 are connected by pipelines, and water pumps can be additionally installed between these structures for sewage pumping if necessary. For example, the grid well 2 is connected to the primary sedimentation tank 5 through a connecting pipeline 4. A water pump 3 is arranged on the connecting pipeline 4. The connecting pipelines between the above structures can select gravity flow or pressure flow for sewage transportation according to actual conditions.

[0028] A grid machine is arranged in the grid well 2 for filtering coarse suspended solids and floating solids in the sewage. The inlet of the grid well 2 is connected to a sewage generating place in the factory area through a water inlet pipe 1.

[0029] The primary sedimentation tank 5 is used for preliminary sedimentation removal of fine particles to reduce the subsequent treatment load.

[0030] The anaerobic biological reactor 6 is an upflow anaerobic sludge bed, which can remove a higher concentration of COD.

[0031] The aerobic biological reactor 8 is a contact oxidation tank.

[0032] The secondary sedimentation tank 10 is used for removing sludge and other precipitates in the effluent of the previous stage process to reduce the turbidity of the effluent. The outlet of the secondary sedimentation tank 10 is connected to a discharge pipe 11, and the effluent is discharged in accordance with the standard.

[0033] The bottom of each of the primary sedimentation tank 5, the anaerobic biological reactor 6 and the secondary sedimentation tank 10 is provided with a sludge collecting pipe 13, and the sludge collecting pipes 13 are connected to a sludge main pipe 12 for facilitating subsequent sludge treatment.

[0034] In combination Figure 2 A sealing cover plate I 15 is installed on the top of the grid well 2, a sealing cover plate II 16 is installed on the top of the primary sedimentation tank 5, a sealing cover plate III 17 is installed on the top of the anaerobic biological reactor 6, a sealing cover plate IV 18 is installed on the top of the aerobic biological reactor 8, and a sealing cover plate V 20 is installed on the top of the secondary sedimentation tank 10. The sealing cover plates can prevent VOCs from escaping.

[0035] The first air pipe is arranged on the sealing cover plate I15 to the sealing cover plate V20, and the first air pipe is connected with the gas conveying pipe 19. The second air pipe is arranged on the sealing cover plate I15 to the sealing cover plate III 17 and the sealing cover plate V20, and the second air pipe is connected with the gas collecting main pipe 21, and the gas collecting main pipe 21 is connected with the VOCs treatment equipment.

[0036] The sewage treatment station provided with the VOCs waste gas collecting system can be applied to the factory area of the printing and dyeing, plastic film printing, chemical production and other industries.

[0037] When the sewage treatment station provided with the VOCs waste gas collecting system is in operation, the air blower 14 continuously supplies air to the aerobic biological reactor 8, and the residual air after aeration is sent to other structures through the gas conveying pipe 19, so as to form internal pressure in the other structures, and the pressure airflow is transported to the gas collecting main pipe 21 through the second air pipe, and the VOCs in the structures are blown away.

[0038] After the structures of the sewage treatment station provided with the VOCs waste gas collecting system are sealed at the top, the air pipes are additionally arranged on the top cover plates, part of the air pipes are used for conveying the aeration air from the contact oxidation pool to the grid well 2, the primary sedimentation tank 5, the up-flow anaerobic sludge bed and the secondary sedimentation tank 10, internal pressure is formed in the structures, and the internal pressure can make the internal gas of the structures be pressurized and transported to the gas collecting main pipe 21; and part of the air pipes on the cover plates in the structures are used for collecting VOCs gas, and the collected VOCs gas is conveyed to the VOCs treatment facility in the factory area, and is discharged through the exhaust port after treatment.

[0039] In addition, it should be understood that, after reading the above description of the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the claims attached to the present application.

Claims

1. A sewage treatment plant provided with a VOCs exhaust gas collection system, comprising an aerobic bioreactor, an aeration device for supplying air to the aerobic bioreactor, and other sewage treatment means, characterized in that, The top of the aerobic biological reactor and the other wastewater treatment device is provided with a sealing cover plate, and a first air pipe is arranged on the sealing cover plate. The top of the other wastewater treatment device is also provided with a second air pipe, and the second air pipe is connected to a gas collecting main.

2. The wastewater treatment plant provided with a VOCs off-gas collection system according to claim 1, characterized in that, The other wastewater treatment device includes one or more combinations of a grid well, a primary sedimentation tank, an anaerobic biological reactor, and a secondary sedimentation tank.

3. The wastewater treatment plant provided with a VOCs off-gas collection system according to claim 2, characterized in that, The anaerobic biological reactor is an upflow anaerobic sludge bed.

4. The wastewater treatment plant provided with a VOCs off-gas collection system according to any one of claims 1 to 3, characterized in that, The other wastewater treatment device includes a grid well, a primary sedimentation tank, an anaerobic biological reactor, and a secondary sedimentation tank, and the grid well, the primary sedimentation tank, the anaerobic biological reactor, the aerobic biological reactor, and the secondary sedimentation tank are sequentially connected.

5. The wastewater treatment plant provided with a VOCs off-gas collection system according to claim 4, characterized in that, The bottom of the primary sedimentation tank, the anaerobic biological reactor, and the secondary sedimentation tank is provided with a sludge collecting pipe, and the sludge collecting pipe is connected to a sludge main.

6. The wastewater treatment plant provided with a VOCs off-gas collection system of claim 1, wherein, The aeration equipment includes a blower and an aeration pipe, the blower is connected to the aeration pipe, and a gas distribution hole is arranged on the aeration pipe and located at the bottom of the aerobic biological reactor.

7. The wastewater treatment plant provided with a VOCs off-gas collection system of claim 1, wherein, The aerobic biological reactor is a contact oxidation tank.

8. The wastewater treatment plant provided with a VOCs off-gas collection system according to claim 1, characterized in that, The gas collecting main is connected to a VOCs treatment device.

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