High-concentration wine brewing wastewater treatment system

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a high-concentration wine brewing wastewater treatment system which comprises a hydrolysis acidification tank, a primary anaerobic tank, a secondary anaerobic tank and a vertical flow sedimentation tank which are sequentially connected through a sewage pipeline, the system further comprises a biogas collection and storage device, the biogas collection and storage device is movably arranged at the top of the second-stage anaerobic tank, and the first-stage anaerobic tank and the second-stage anaerobic tank are communicated with the biogas collection and storage device through biogas pipelines respectively. The vertical flow sedimentation tank is also communicated with an anaerobic sludge return pipeline; and the anaerobic sludge return pipeline is communicated with the first-stage anaerobic jar and the second-stage anaerobic jar. According to the system disclosed by the utility model, the impact of acid wine-making wastewater on anaerobic sludge can be avoided; the first-stage anaerobic tank and the second-stage anaerobic tank are adopted for anaerobic fermentation, the degradation efficiency of high-concentration organic matter is improved, the vertical flow sedimentation tank is arranged behind the second-stage anaerobic tank, anaerobic sludge is settled, part of anaerobic sludge flows back, anaerobic sludge loss is avoided, a biogas cabinet does not need to be independently arranged for storage, and the occupied space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a high-concentration brewing wastewater treatment system. Background Art

[0002] Brewing wastewater, especially liquor brewing wastewater, has high COD (chemical oxygen demand) and BOD5 (five-day biochemical oxygen demand), with COD as high as 5500-8000 mg / L. At the same time, liquor brewing wastewater is acidic. Directly using aerobic biological treatment technology to degrade COD requires a large amount of aeration and carbon source, and has high energy consumption. It is not suitable for directly treating high-concentration brewing wastewater. The anaerobic fermentation process is a process in which microorganisms convert large molecular organic matter into small molecular organic matter through anaerobic respiration in an oxygen-deficient environment, and produce methane substances with secondary utilization value, with low energy consumption and high organic matter removal rate.

[0003] Traditional anaerobic tanks are mostly composed of a three-phase separator, a reactor body, and a water supply pipe. The prior art CN214693490U discloses a UASB anaerobic reactor, which includes a box body, a slag plate, a three-phase separator located on the upper side of the slag plate, and a gas collection pipe arranged on the top of the three-phase separator. A liquid flow channel is reserved between the slag plate and the three-phase separator, and the slag plate is tilted so that the sludge after the reaction in the sludge reaction area of ​​the box body collides with the lower side of the slag plate, and can fall to the bottom of the box body by gravity, and the sludge is compacted in the anaerobic tank. The traditional anaerobic reaction tank has only one water inlet pipe and one water outlet pipe, and the water distribution in the system is uneven, causing system paralysis and other phenomena, and the anaerobic treatment efficiency is low. At the same time, the biogas produced by the anaerobic tank needs to be stored in a separate biogas cabinet, which occupies the site space. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a high-concentration brewing wastewater treatment system to avoid the impact of acidic brewing wastewater on anaerobic sludge and improve the degradation efficiency of high-concentration organic matter.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0006] A high-concentration brewing wastewater treatment system comprises a hydrolysis acidification tank, a primary anaerobic tank, a secondary anaerobic tank, and a vertical flow sedimentation tank which are sequentially connected via a sewage pipe; further comprising a biogas collecting and storing device, which is movably arranged on the top of the secondary anaerobic tank, and the primary anaerobic tank and the secondary anaerobic tank are respectively connected to the biogas collecting and storing device via a biogas pipeline; the vertical flow sedimentation tank is also connected to an anaerobic sludge return pipeline, and the anaerobic sludge return pipeline is connected to the primary anaerobic tank and the secondary anaerobic tank.

[0007] Furthermore, a pH adjustment and detection device is provided in the hydrolysis acidification tank, and the pH adjustment and detection device includes an online pH monitor and a drug dosing pipe.

[0008] Furthermore, a stirring device is provided in the hydrolysis acidification tank.

[0009] Furthermore, the primary anaerobic tank and the secondary anaerobic tank are double-layer tank structures, and a water distributor is connected between the inner tank body and the outer tank body. The upper end of the water distributor is connected to the upper part of the inner tank body, and the lower end extends to the lower part of the outer tank body. A water outlet weir is provided on the upper part of the outer tank body. The hydrolysis acidification tank is connected to the inner tank body of the primary anaerobic tank through a sewage pipe, the water outlet weir of the primary anaerobic tank is connected to the inner tank body of the secondary anaerobic tank through a sewage pipe, and the water outlet weir of the secondary anaerobic tank is connected to the vertical flow sedimentation tank through a pipe.

[0010] Furthermore, the water distributor is provided with a plurality of water distribution pipes, and the plurality of water distribution pipes are evenly arranged around the outer circumference of the inner tank body.

[0011] Furthermore, a constant temperature heater is connected between the hydrolysis acidification tank and the primary anaerobic tank, and between the primary anaerobic tank and the secondary anaerobic tank.

[0012] Furthermore, the primary anaerobic tank and the secondary anaerobic tank are provided with a heat preservation device.

[0013] Preferably, a rubber-plastic plate insulation layer is provided on the outside of the tank body of the primary anaerobic tank and the secondary anaerobic tank.

[0014] Furthermore, the biogas collecting and storing device comprises a gas collecting hood, in which a biogas storage amount detection device and a pressure stabilizing system are arranged.

[0015] Furthermore, a sludge return pump is provided on the anaerobic sludge return pipeline, and the anaerobic sludge returns to the inner tank bodies of the primary anaerobic tank and the secondary anaerobic tank through the sludge return pump.

[0016] The beneficial effects of the utility model are:

[0017] The high-concentration brewing wastewater treatment system of the utility model adopts a hydrolysis acidification tank to adjust the pH value of the wastewater, thereby preventing the acidic brewing wastewater from impacting the anaerobic sludge; adopts a primary anaerobic tank and a secondary anaerobic tank for anaerobic fermentation, thereby improving the degradation efficiency of high-concentration organic matter; the wastewater is anaerobically fermented under the action of anaerobic microorganisms, and the generated biogas is stored in a biogas collection and storage device on the upper part of the secondary anaerobic tank through a biogas pipeline, without the need to set up a separate biogas cabinet for storage, thereby saving floor space; a vertical flow sedimentation tank is arranged behind the secondary anaerobic tank, for sedimenting the anaerobic sludge and returning part of the anaerobic sludge, thereby preventing the loss of anaerobic sludge.

[0018] The primary / secondary anaerobic tank in the utility model adopts a double-layer design of inner and outer layers, and is provided with a water distributor connecting the inner tank body and the outer tank body. The water distributor transports wastewater from the top of the inner tank body to the bottom of the outer tank body. The flow impact of the water flow on the bottom will not cause sludge accumulation, avoid sludge compaction, and can realize the control of the rising flow rate in the inner tank body.

[0019] The utility model has a constant temperature heater connected between the hydrolysis acidification tank and the first-level anaerobic tank, and between the first-level anaerobic tank and the second-level anaerobic tank. The first-level anaerobic tank and the second-level anaerobic tank are provided with a heat preservation device, so that the temperature of the wastewater in the first-level anaerobic tank and the second-level anaerobic tank is maintained at 30-35°C, providing a constant temperature condition for anaerobic fermentation and improving anaerobic treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the layout of the water distributor.

[0023] Figure numerals: 1-hydrolysis acidification tank, 2-primary anaerobic tank, 3-secondary anaerobic tank, 4-vertical flow sedimentation tank, 5-outlet weir, 6-water distributor, 7-biogas collection and storage device, 8-inner tank body, 9-outer tank body. DETAILED DESCRIPTION

[0024] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

[0025] A high-concentration brewing wastewater treatment system comprises a hydrolysis acidification tank 1, a primary anaerobic tank 2, a secondary anaerobic tank 3, and a vertical flow sedimentation tank 4 which are sequentially connected through a sewage pipe; and further comprises a biogas collection and storage device 7, wherein the biogas collection and storage device 7 is movably arranged on the top of the secondary anaerobic tank 3, and the primary anaerobic tank 2 and the secondary anaerobic tank 3 are respectively connected to the biogas collection and storage device 7 through a biogas pipeline; the vertical flow sedimentation tank 4 is also connected to an anaerobic sludge return pipeline, and the anaerobic sludge return pipeline is connected to the primary anaerobic tank 2 and the secondary anaerobic tank 3. After the pH of the high-concentration acidic brewing wastewater is adjusted in the hydrolysis acidification tank 1, it enters the primary anaerobic tank 2 and the secondary anaerobic tank 3 in sequence to undergo anaerobic fermentation under the action of anaerobic microorganisms, and then enters the vertical flow sedimentation tank 4 to precipitate anaerobic sludge, and the anaerobic sludge is returned to the primary anaerobic tank and the secondary anaerobic tank through the anaerobic sludge return pipeline, and the biogas generated by the anaerobic fermentation is stored in the biogas collection and storage device 7 through the biogas pipeline.

[0026] The hydrolysis acidification tank 1 is provided with a pH adjustment and detection device, which includes an online pH monitor and a drug dosing pipe. The pH in the hydrolysis acidification tank 1 is controlled at about 6 to 7. The hydrolysis acidification tank 1 is also provided with a stirring device, which adopts a liftable submersible mixer for easy maintenance.

[0027] Furthermore, the primary anaerobic tank 2 and the secondary anaerobic tank 3 are both double-layer tank structures, and a water distributor 6 is arranged between the inner tank and the outer tank. The upper end of the water distributor 6 is connected to the upper part of the inner tank, and the lower end extends to the lower part of the outer tank. The upper part of the outer tank is provided with a water outlet weir 5. The hydrolysis acidification tank 1 is connected to the inner tank of the primary anaerobic tank 2 through a sewage pipe, and the water outlet weir 5 of the primary anaerobic tank 2 is connected to the inner tank of the secondary anaerobic tank 3 through a pipe, and the water outlet weir 5 of the secondary anaerobic tank 3 is connected to the vertical flow sedimentation tank 4 through a pipe. The water distributor 6 is provided with a plurality of water distribution pipes, and the arrangement of the water distributor 6 is shown in the attached Figure 2 , 8 water distribution pipes are evenly arranged around the outer periphery of the inner tank body, and the water distributor 6 introduces the anaerobic fermentation wastewater from the upper part of the inner tank body to the bottom of the outer tank body, which can realize the control of the rising flow rate.

[0028] Preferably, a constant temperature heater is connected between the hydrolysis acidification tank 1 and the primary anaerobic tank 2, and between the primary anaerobic tank 2 and the secondary anaerobic tank 3. After the sewage comes out of the hydrolysis acidification tank 1, it enters the constant temperature heater, and after being heated, it enters the primary anaerobic tank 2. The sewage coming out of the primary anaerobic tank 2 enters the constant temperature heater, and after being heated, it enters the secondary anaerobic tank 3. Preferably, the primary anaerobic tank 2 and the secondary anaerobic tank 3 are provided with a heat preservation device. Specifically, a 50-100mm thick B1 grade rubber-plastic plate is used for heat preservation on the outside of the tank body of the primary anaerobic tank 2 and the secondary anaerobic tank 3 to keep the wastewater temperature constant at 30-35°C.

[0029] Furthermore, the biogas collecting and storing device 7 comprises a gas collecting hood, in which a biogas storage amount detection device and a pressure stabilizing system are arranged.

[0030] Preferably, the vertical flow sedimentation tank is used to precipitate anaerobic sludge, and a sludge return pump is provided on the anaerobic sludge return pipeline, and the anaerobic sludge is returned to the inner tank bodies of the primary anaerobic tank and the secondary anaerobic tank through the sludge return pump.

[0031] In the utility model, the process of high-concentration brewing wastewater treatment is as follows: the brewing wastewater enters the hydrolysis acidification tank 1, the pH is adjusted to neutral, and is lifted to the bottom of the inner tank body of the primary anaerobic tank 2 by a lifting pump. Under the action of anaerobic microorganisms, anaerobically fermented and biogas is produced at the same time. The biogas is stored in the biogas collecting and storing device 7 at the top of the secondary anaerobic tank 3 through a biogas pipeline. The wastewater is evenly distributed to the bottom of the outer tank body of the anaerobic tank through a water distributor 6, and then passes through the outer upper water outlet weir 5 and enters the bottom of the inner tank body of the secondary anaerobic tank 3 through a sewage pipe for further anaerobically fermented. The produced biogas is collected and stored in the biogas collecting and storing device at the top. The wastewater treatment is consistent with the primary anaerobic tank 2. The effluent of the secondary anaerobic tank 3 enters the vertical flow sedimentation tank 4 to precipitate anaerobic sludge. Part of the anaerobic sludge flows back to the bottom of the inner layer of the primary anaerobic tank 2 and the secondary anaerobic tank 3 to achieve reflux utilization.

[0032] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A high-concentration brewing wastewater treatment system, characterized by: The invention comprises a hydrolysis acidification tank (1), a primary anaerobic tank (2), a secondary anaerobic tank (3), and a vertical flow sedimentation tank (4) which are connected in sequence through a sewage pipe; and further comprises a biogas collection and storage device (7), wherein the biogas collection and storage device (7) is movably arranged on the top of the secondary anaerobic tank (3), and the primary anaerobic tank (2) and the secondary anaerobic tank (3) are respectively connected to the biogas collection and storage device (7) through a biogas pipeline; and the vertical flow sedimentation tank (4) is also connected to an anaerobic sludge return pipeline, and the anaerobic sludge return pipeline is connected to the primary anaerobic tank (2) and the secondary anaerobic tank (3).

2. The high-concentration brewing wastewater treatment system according to claim 1 is characterized by: The hydrolysis acidification tank (1) is provided with a pH adjustment and detection device, which comprises an online pH monitor and a drug dosing pipe.

3. The high-concentration brewing wastewater treatment system according to claim 2 is characterized in that: A stirring device is provided in the hydrolysis acidification tank (1).

4. The high-concentration brewing wastewater treatment system according to claim 1 is characterized in that: The primary anaerobic tank (2) and the secondary anaerobic tank (3) are double-layer tank structures. A water distributor (6) is connected between the inner tank (8) and the outer tank (9). The upper end of the water distributor (6) is connected to the upper part of the inner tank (8), and the lower end extends to the lower part of the outer tank (9). A water outlet weir (5) is provided at the upper part of the outer tank (9). The hydrolysis acidification tank (1) is connected to the inner tank of the primary anaerobic tank (2) through a sewage pipe. The water outlet weir (5) of the primary anaerobic tank (2) is connected to the inner tank of the secondary anaerobic tank (3) through a sewage pipe. The water outlet weir (5) of the secondary anaerobic tank (3) is connected to the vertical flow sedimentation tank (4) through a pipe.

5. The high-concentration brewing wastewater treatment system according to claim 4 is characterized in that: The water distributor (6) is provided with a plurality of water distribution pipes, and the plurality of water distribution pipes are evenly distributed around the outer circumference of the inner tank body.

6. The high-concentration brewing wastewater treatment system according to claim 1 is characterized by: A constant temperature heater is connected between the hydrolysis acidification tank (1) and the primary anaerobic tank (2), and between the primary anaerobic tank (2) and the secondary anaerobic tank (3).

7. The high-concentration brewing wastewater treatment system according to claim 6 is characterized by: The primary anaerobic tank (2) and the secondary anaerobic tank (3) are provided with a heat preservation device.

8. The high-concentration brewing wastewater treatment system according to claim 7 is characterized by: The first-level anaerobic tank (2) and the second-level anaerobic tank (3) are provided with a rubber-plastic plate insulation layer on the outside of the tank body.

9. The high-concentration brewing wastewater treatment system according to claim 1 is characterized by: The biogas collection and storage device (7) comprises a gas collecting hood, in which a biogas storage amount detection device and a pressure stabilization system are arranged.

10. The high-concentration brewing wastewater treatment system according to claim 4, characterized in that: A sludge return pump is provided on the anaerobic sludge return pipeline, and the anaerobic sludge is returned to the inner tank bodies (8) of the primary anaerobic tank (2) and the secondary anaerobic tank (3) through the sludge return pump.

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