System for treating high-temperature wastewater from brewing

Abstract

This utility model discloses a system for treating high-temperature wastewater from liquor brewing. The system comprises a solid filter, a cooling tower, a homogenizing tank, an anaerobic reactor, an anaerobic sedimentation tank, an AAO tank, a secondary sedimentation tank, and a phosphorus removal tank, arranged sequentially. All components are connected via wastewater pipelines. A pH detector is installed in the homogenizing tank for pH adjustment. By connecting multiple treatment devices, the system's automation and streamlined operation are enhanced, reducing manual labor requirements and intensity, and improving wastewater treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquor brewing technology, specifically to a system for treating high-temperature wastewater from liquor brewing. Background Technology

[0002] Wastewater treatment refers to the physical, chemical, and biological treatment of sewage to reduce or remove pollutants, enabling it to meet discharge standards and reuse requirements. Given the increasing scarcity of water resources and water pollution worldwide, wastewater treatment is of paramount importance. In recent years, with the gradual automation and intelligentization of liquor production, while production efficiency has significantly improved, the demand for treating brewing wastewater has also increased dramatically. Therefore, considering the characteristics of brewing wastewater—high temperature (≥85℃), high acidity (pH 3.8–4.5), and the presence of small amounts of lees and starch—it is particularly urgent to provide an effective, efficient, stable, and automated system and method for treating high-temperature brewing wastewater. Utility Model Content

[0003] To improve the efficiency of treating high-temperature wastewater from brewing, this utility model provides a system for treating high-temperature wastewater from brewing.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] The system for treating high-temperature wastewater from brewing includes a solid filtration device, a cooling tower, a homogenizing tank, an anaerobic reactor, an anaerobic sedimentation tank, an AAO tank, a secondary sedimentation tank, and a phosphorus removal tank arranged in sequence. The various devices are connected by wastewater pipelines. A pH detector is installed in the homogenizing tank for feedback and pH adjustment.

[0006] In this application, by connecting multiple treatment devices, the system's ability to operate automatically and efficiently is enhanced, reducing the need for manual labor, lowering labor intensity, and improving wastewater treatment efficiency.

[0007] In some embodiments, the solids filtration device includes a grid pool and a rotating filter arranged sequentially in series.

[0008] In some embodiments, a valve and a temperature detection device are installed before the cooling tower. The valve is a three-way valve, which can control whether the wastewater passes through the cooling tower when it goes to the homogenization tank. The temperature detection device is used to detect whether the temperature meets the set requirements, thereby adjusting the valve to control whether the wastewater passes through the cooling tower.

[0009] In some embodiments, a valve and a flow detection device are installed before the cooling tower; the flow monitoring device is used to detect the real-time flow rate in order to adjust the valve opening.

[0010] In some embodiments, the homogenizing tank, anaerobic sedimentation tank, and AAO tank are also connected to an odor pipeline for collecting odors and connecting them to an odor treatment device, which includes an alkaline scrubbing tower and a soil deodorization layer connected in sequence.

[0011] In some embodiments, the system further includes a sludge tank for collecting sludge discharged from the system. The sludge is connected to the sludge tank via a sludge pipeline, and the sludge tank is connected to a sludge treatment device, which includes a sludge thickener and a plate and frame filter press arranged sequentially.

[0012] In some embodiments, the wastewater pipeline between the cooling tower and the homogenization tank also has a branch line connected to the emergency tank.

[0013] In some embodiments, a testing tank is provided after the phosphorus removal tank to detect whether the treated wastewater is up to standard.

[0014] In some embodiments, the anaerobic reactor is also connected to a biogas pipeline for recovering the biogas produced in the anaerobic reactor. The anaerobic reactor is connected in sequence to a water seal tank, a desulfurization device, a biogas compressor, and a biogas dry cooler via the biogas pipeline.

[0015] In some embodiments, a three-way valve is provided after the desulfurization unit, with one biogas pipeline connected to the biogas compressor and the biogas dry cooler, and the other biogas pipeline connected to the biogas spherical unit to store excess biogas.

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

[0017] By connecting multiple treatment devices, the system's automation and process-oriented operation capabilities are enhanced, reducing manual labor requirements, lowering labor intensity, and improving wastewater treatment efficiency. Attached Figure Description

[0018] Figure 1 A simplified structural diagram of the solid filtration device in the system for treating high-temperature wastewater from brewing provided by this utility model;

[0019] Figure 2 A simplified structural diagram of the cooling tower in the system for treating high-temperature wastewater from brewing provided by this utility model;

[0020] Figure 3 This is a simplified structural diagram of the cooling wastewater treatment device in the system for treating high-temperature wastewater from brewing provided by this utility model.

[0021] Figure 4 A simplified structural diagram of the odor treatment device in the system for treating high-temperature wastewater from brewing provided by this utility model;

[0022] Figure 5A simplified structural diagram of the biogas treatment device in the system for treating high-temperature wastewater from brewing provided by this utility model;

[0023] Figure 6 A simplified structural diagram of the biochemical reaction in the system for treating high-temperature wastewater from brewing provided by this utility model;

[0024] Figure 7 This is a simplified structural diagram of the sludge treatment device in the system for treating high-temperature wastewater from brewing provided by this utility model.

[0025] The diagram shows the following: 1. Wastewater pipeline; 2. Bar screen; 3. Rotary drum filter; 4. Valve; 5. Cooling tower; 6. Homogenizing tank; 7. Chemical pipeline; 8. Biogas pipeline; 9. Anaerobic sedimentation tank; 10. AAO tank; 11. Air pipeline; 12. Sludge return tank; 13. Secondary sedimentation tank; 14. Primary phosphorus removal tank; 15. Sludge pipeline; 16. Secondary phosphorus removal tank; 17. Odor pipeline; 18. Primary alkaline scrubbing tower; 19. Secondary alkaline scrubbing tower; 2 0. Soil deodorization layer; 21. Water seal tank; 22. First desulfurization tower; 23. Water supply pipeline; 24. Sulfur bioreactor; 25. Gas-water separator; 26. Second desulfurization tower; 27. Biogas compressor; 28. Biogas balloon; 29. ​​Biogas flare; 30. Biogas buffer tank; 31. Biogas refrigerated dryer; 32. Anaerobic reactor; 33. Sludge tank; 34. Sludge dewatering room; 35. Sludge thickener; 36. Plate and frame filter press; 37. Conditioning tank. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] like Figure 1-7 As shown, this utility model provides a system for treating high-temperature wastewater from brewing.

[0029] The system for treating high-temperature wastewater from brewing mainly consists of seven parts: solid filtration, wastewater cooling, wastewater pH adjustment, odor recovery and purification, biogas desulfurization and recovery, biochemical reaction, and sludge dewatering.

[0030] It includes a solid filtration device, a cooling tower 5, a homogenizing tank 6, an anaerobic reactor 32, an anaerobic sedimentation tank 9, an AAO tank 10, a secondary sedimentation tank 13, and a phosphorus removal tank arranged in sequence. The various devices are connected by a wastewater pipeline 1. The homogenizing tank 6 is equipped with a pH detector for feedback and adjustment of the pH value.

[0031] In this application, by connecting multiple treatment devices, the system's ability to operate automatically and efficiently is enhanced, reducing the need for manual labor, lowering labor intensity, and improving wastewater treatment efficiency.

[0032] Specifically, refer to Figure 3 As shown, a mixing system is installed at the effluent end of the equalization tank 6. The mixing system is equipped with a pH detector and a temperature sensor. The pH is adjusted (controlled between 6 and 9) by automatically and quantitatively adding reagents to the reagent pipeline 7, and the pH and other water quality parameters are controlled by stirring. After the set conditions are met, the water is pumped into the anaerobic reactor 32. The anaerobic reactor 32 uses anaerobic bacteria in the anaerobic sludge to remove organic pollutants in the wastewater and produce usable biogas. The effluent from the anaerobic reactor 32 enters the anaerobic sedimentation tank 9 for sludge-water separation. Part of the settled sludge is returned to the anaerobic reactor 32. The biogas produced by the anaerobic reactor 32 is treated by the drying and desulfurization system and then enters the biogas balloon 28.

[0033] The supernatant effluent from anaerobic sedimentation tank 9, along with the carbon source-mixed water and the return sludge from secondary sedimentation tank 13, enters AAO tank 10. In this embodiment, AAO tank 10 is a modified AAO tank 10, which sequentially passes through functional zones such as pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, multifunctional zone, and post-aerobic zone. After removing most of the organic matter, total nitrogen, ammonia nitrogen, suspended solids, and some total phosphorus from the wastewater, it enters secondary sedimentation tank 13, where sludge-water separation occurs again. The supernatant from secondary sedimentation tank 13 sequentially enters primary phosphorus removal tank 14, secondary phosphorus removal tank 16, and a testing tank. In the phosphorus removal tank, a mixed phosphorus removal agent is automatically added to remove most of the total phosphorus and color; if the test is qualified, it is discharged through the main outlet.

[0034] In this embodiment, the phosphorus removal tank includes a primary phosphorus removal tank 14 and a secondary phosphorus removal tank 16 arranged sequentially.

[0035] Typically, both the anaerobic reactor 32 and the anaerobic sedimentation tank 9 are connected to air pipelines 11 for gas intake. The AAO tank is also connected to a sludge return tank 12.

[0036] Reference Figure 1 As shown, the solids filtration device includes a grid pool 2 and a rotary drum filter 3 arranged sequentially from front to back.

[0037] The system adopts a two-stage filtration design. In the first stage, a chain screen is placed in the screen pool 2, which divides the water channel into two. After the wastewater passes through the screen, large particles are filtered by the chain screen to the discharge port. After filtration, the wastewater passes through the drum filter 3 to discharge finer solid waste to the collection port, and then the wastewater enters the next treatment stage.

[0038] Reference Figure 2As shown, in this embodiment, a valve 4 and a temperature detection device are installed before the cooling tower 5. The valve 4 is a three-way valve, which can control whether the wastewater passes through the cooling tower 5 when it goes to the homogenization tank 6. The temperature detection device is used to detect whether the temperature meets the set requirements, thereby adjusting the valve 4 to control whether the wastewater passes through the cooling tower 5.

[0039] A flow detection device is installed before cooling tower 5 here; the flow monitoring device is used to detect the real-time flow to adjust the opening of valve 4.

[0040] In this embodiment, the wastewater pipeline 1 between the cooling tower 5 and the homogenization tank 6 also has a branch line connected to the emergency tank.

[0041] In practice, valve 4 is configured as an electric valve to facilitate automatic opening or adjustment of the opening degree in conjunction with the temperature detection device and flow monitoring device. Specifically, it detects whether the temperature meets the set requirements. If the requirements are met, the cooling tower 5 is not started. At the same time, it monitors the real-time flow rate. If the short-term wastewater volume is greater than the water volume that the cooling tower 5 can handle, the electric valve 4 can control the opening degree, thereby controlling the amount of water entering the cooling tower 5. If the temperature is higher than the set value, the cooling tower 5 is automatically started for primary cooling. After cooling, the wastewater pipeline 1 can be measured a second time. If the temperature is still too high, the cooling tower 5 is automatically started for secondary cooling. The wastewater that has reached the cooling standard enters the homogenization tank 6 for buffering. At the same time, in order to manage environmental risks, an emergency tank is set up to collect wastewater in special circumstances.

[0042] In this embodiment, the homogenization tank 6, the anaerobic sedimentation tank 9, and the AAO tank 10 are also connected to an odor pipeline 17 for collecting odors and connecting them to an odor treatment device. The odor treatment device includes an alkaline scrubbing tower and a soil deodorization layer 20 that are connected in sequence.

[0043] Reference Figure 4 As shown, in practice, the odor collected from the homogenization tank 6, the bar screen tank 2, the emergency tank, the mixing tank, the anaerobic sedimentation tank 9, the sludge dewatering room 34, and the modified AAO tank 10 is purified by the alkaline scrubbing tower, and finally discharged after biological deodorization and testing to meet the standards.

[0044] In this embodiment, a sludge tank 33 is also included for collecting sludge discharged from the system. The sludge is connected to the sludge tank 33 via a sludge pipeline 15, and the sludge tank 33 is connected to a sludge treatment device. The sludge treatment device includes a sludge thickener 35 and a plate and frame filter press 36 arranged sequentially.

[0045] Specifically, refer to Figure 7As shown, the sludge scrapers in the primary phosphorus removal tank 14, secondary phosphorus removal tank 16, and anaerobic sedimentation tank 9 are constantly running. Sludge enters the sludge tank 33, and the sludge pump is started to pump the sludge to the sludge thickener 35 for concentration. The concentrated sludge automatically enters the conditioning tank 37 through a vertical pipe for buffering. The low-pressure screw pump is started, and the plate and frame filter press 36 is automatically started to compress and dewater it into sludge blocks, which are then loaded onto trucks for transportation. The sludge thickener 35, the plate and frame filter press 36, and the conditioning tank 37 are located in the sludge dewatering room 34.

[0046] In this embodiment, a detection tank is also provided after the phosphorus removal tank to detect whether the treated wastewater is up to standard.

[0047] Reference Figure 5 As shown, in this embodiment, the anaerobic reactor 32 is also connected to a biogas pipeline 8 for the recovery of biogas generated in the anaerobic reactor 32. The anaerobic reactor 32 is connected in sequence to a water seal tank 21, a desulfurization device, a biogas compressor 27 and a biogas refrigerated dryer 31 through the biogas pipeline 8.

[0048] In this embodiment, a biogas buffer tank 30 is also provided between the biogas compressor 27 and the biogas refrigerated dryer 31.

[0049] Furthermore, a three-way valve is installed after the desulfurization unit, one of which, a biogas pipeline 8, is connected to the biogas compressor 27 and the biogas refrigerated dryer 31, and the other biogas pipeline 8 is connected to the biogas spherical bulb 28 to store excess biogas.

[0050] Specifically, the booster pump is started, and the wastewater in the homogenization tank 6 enters the anaerobic reactor 32, where it reacts to produce biogas. The biogas is then sent through the water seal tank 21 to the first desulfurization tower 22 and the sulfur bioreactor 24 to remove most of the hydrogen sulfide from the biogas. A water supply pipeline 23 connects the first desulfurization tower 22 and the sulfur bioreactor 24. The biogas is then sent to the second desulfurization tower 26 to further remove hydrogen sulfide from the biogas. The second desulfurization tower 26 is a dry desulfurization tower, and a gas-water separator 25 is installed before it. The second desulfurization tower 26 ensures that the hydrogen sulfide content in the purified biogas is less than 6 mg / m³. The biogas compressor 27 is started to compress the biogas, and it is then dried by the biogas refrigeration dryer 31 and sent to the energy workshop as boiler fuel, replacing part of the natural gas. When the energy workshop does not need biogas, the biogas enters the biogas balloon 28 for storage. When the pressure in the biogas balloon 28 exceeds the set value, the biogas flare 29 is automatically started to burn off the excess biogas.

[0051] Biochemical reaction section (refer to) Figure 6 As shown, the sludge pump of the anaerobic reactor 32 sends sludge into the anaerobic sedimentation tank 9 for anaerobic reaction. The bottom scraper is constantly running, and the sludge enters the sludge tank 33, which is also connected to the modified AAO tank 10 for further anoxic and aerobic activities.

[0052] This province requests the disclosure of an automated system, including: a central integrated control system, an online monitoring system, a wastewater pretreatment system, a biochemical treatment system, and a post-treatment system.

[0053] Central integrated control system: used for automatic or manual control of the operation of the above systems, monitoring the operation of the above systems, collecting and storing the operation data of the above systems, and automatic control, etc.

[0054] Online monitoring system: Connected to the central integrated control system. The monitoring system includes pressure transmitters, temperature sensors, pH meters, electromagnetic flow meters, odor concentration detectors, hydrogen sulfide detectors, and methane detectors. Pressure transmitters are connected in series in various pipelines to measure fluid pressure. Temperature sensors monitor the cooling results of high-temperature wastewater in real time. pH meters detect the pH value of alkaline solutions. Electromagnetic flow meters are connected in series in various pipelines to monitor flow rate in real time.

[0055] Wastewater pretreatment system: This includes a solids filtration system and a wastewater cooling system. The solids filtration system comprises a bar screen (2), a chain conveyor, a chute, and a cooling tower (5). The bar screen (2) filters out large debris and distiller's grains. The chain conveyor transfers the filtered debris to the chute. The chute then transfers the filtered debris to a temporary waste storage bin. The wastewater cooling system, primarily the cooling tower (5), cools the incoming high-temperature wastewater.

[0056] The biological treatment system includes a biological reaction system and an aeration system. The biological reaction system comprises an anaerobic reactor 32, an anaerobic sedimentation tank 9, and an AAO tank 10. Cooled wastewater enters the anaerobic reactor 32, where microorganisms react to produce biogas. A three-stage separator separates the solid, liquid, and gas phases. In the anaerobic sedimentation tank 9, anaerobic bacteria metabolize and produce sediment. The AAO tank 10 undergoes an anaerobic-anoxic-aerobic biological reaction process to remove nitrogen and phosphorus from the water. The aeration system includes aeration pipes and blowers. The blowers supply air, and the aeration pipes distribute air evenly throughout the water.

[0057] The post-treatment system includes an odor control system, a biogas desulfurization and recovery system, and a sludge dewatering system. The odor control system consists of an odor pipeline 17, a humidifier, a primary alkaline scrubbing tower 18, a secondary alkaline scrubbing tower 19, a soil deodorization layer 20, and a blower. The odor pipeline 17 and the blower extract odorous gases, while the alkaline scrubbing towers and the soil deodorization layer 20 purify the odorous gases. The biogas desulfurization and recovery system collects the biogas produced in the anaerobic reactor 32, desulfurizes and recovers it, and stores it. The sludge dewatering system collects sludge from each process stage and performs sludge concentration and dewatering. Soil treatment is a widely used biological deodorization method.

[0058] Furthermore, during the wastewater pretreatment process, the online temperature transmitter monitors the process. If the temperature is still below the set value after the first cooling tower 5 cools down, the two cooling towers 5 are automatically started for secondary cooling. The electromagnetic flow meter detects the real-time flow rate. If the wastewater volume is greater than the water volume that the cooling tower 5 can process in a short time, the valve 4 can control the opening degree, thereby controlling the amount of water entering the cooling tower 5.

[0059] Furthermore, during the wastewater transportation process, the flow rate is monitored by an electromagnetic flow meter. If there is no flow during operation, the pump running in that pipeline will automatically stop.

[0060] Furthermore, in the biological deodorization system, both the wastewater storage tank (i.e., the homogenization tank 6) and the anaerobic sedimentation tank 9 are completely covered. An odor detector monitors the treated gas to determine if it meets emission standards. Once standards are met, the gas is automatically discharged.

[0061] Furthermore, the cooled wastewater from the outlet of cooling tower 5 enters the homogenization tank 6, where alkali solution is automatically added to adjust the pH value of the wastewater after pH detection.

[0062] Furthermore, the wastewater in the anaerobic reactor 32 comes from the outlet wastewater of the homogenization tank 6 after cooling and pH adjustment. The reaction status is detected by the temperature sensor on the anaerobic reactor 32, and automatic internal and external wastewater circulation is carried out to prevent sediment from settling. This is driven by a circulation pump.

[0063] Furthermore, the anaerobic tank in AAO pool 10 primarily releases phosphorus and ammonifies some organic matter. The anoxic tank removes NH3-N from the wastewater and degrades organic matter. Simultaneously, facultative anaerobic bacteria in the water oxidize and decompose large organic molecules that are difficult for aerobic bacteria to degrade into smaller, more easily degradable organic molecules, improving their biodegradability and creating favorable conditions for aerobic processes. The aerobic tank's main function is to convert organic matter into inorganic substances through biological oxidation, thereby reducing the pollutant content in the water. Water quality indicators are monitored using oxygen sensors, COD sensors, and other equipment in AAO pool 10, and automatic replenishment of water, carbon sources, and aeration are implemented.

[0064] Furthermore, the biogas desulfurization and recovery system uses a biogas compressor 27 to compress and dry the desulfurized biogas before delivering it to the user. When not in use, the biogas is stored in a biogas spherical tube 28; when storage is no longer possible, it is burned off using a biogas flare 29.

[0065] Furthermore, in the sludge dewatering system, there are sludge sedimentation tanks and phosphorus removal tanks. The sludge is pumped to a sludge thickener 35 for thickening through a sludge discharge pipe at the bottom of the tank, and then compressed and dewatered into sludge blocks by a plate and frame filter press 36.

[0066] Furthermore, the central integrated control system using DCS control mode integrates the wastewater pretreatment system and the wastewater posttreatment system, realizing the start-up and shutdown control of the above systems, the setting of process parameters, the operation monitoring of equipment in each process link, and the collection and storage of production process operation data.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A system for treating high-temperature wastewater from brewing, characterized in that: It includes a solid filtration device, a cooling tower (5), a homogenizing tank (6), an anaerobic reactor (32), an anaerobic sedimentation tank (9), an AAO tank (10), a secondary sedimentation tank (13), and a phosphorus removal tank arranged in sequence, and the various devices are connected by wastewater pipelines (1). The homogenizing tank (6) is equipped with a pH detector for feedback adjustment of pH value.

2. The system for treating high-temperature brewing wastewater as described in claim 1, characterized in that: The solids filtration device includes a grid pool (2) and a drum filter (3) connected in sequence.

3. The system for treating high-temperature brewing wastewater as described in claim 1, characterized in that: A valve (4) and a temperature detection device are installed before the cooling tower (5). The valve (4) is a three-way valve, which can control whether the wastewater passes through the cooling tower (5) when it goes to the homogenization tank (6). The temperature detection device is used to detect whether the temperature meets the set requirements, thereby adjusting the valve (4) to control whether the wastewater passes through the cooling tower (5).

4. The system for treating high-temperature brewing wastewater as described in claim 1, characterized in that: A valve (4) and a flow detection device are installed before the cooling tower (5); The flow monitoring device is used to detect real-time flow to adjust the opening of valve (4).

5. The system for treating high-temperature brewing wastewater as described in claim 1, characterized in that: The homogenizing tank (6), anaerobic sedimentation tank (9) and AAO tank (10) are also connected to an odor pipeline (17) for collecting odors and connecting them to an odor treatment device. The odor treatment device includes an alkaline scrubbing tower and a soil deodorization layer (20) connected in sequence.

6. The system for treating high-temperature brewing wastewater as described in claim 1, characterized in that: It also includes a sludge tank (33) for collecting sludge discharged from the system. The sludge is connected to the sludge tank (33) via a sludge pipeline (15), and the sludge tank (33) is connected to a sludge treatment device, which includes a sludge thickener (35) and a plate and frame filter press (36) connected in sequence.

7. The system for treating high-temperature brewing wastewater as described in claim 1, characterized in that: The wastewater pipeline (1) between the cooling tower (5) and the homogenization tank (6) has a branch line that connects to the emergency pool.

8. The system for treating high-temperature brewing wastewater as described in claim 1, characterized in that: A testing tank is installed after the phosphorus removal tank to test whether the treated wastewater meets the standards.

9. The system for treating high-temperature brewing wastewater as described in any one of claims 1-8, characterized in that: The anaerobic reactor (32) is also connected to a biogas pipeline (8) for the recovery of biogas generated in the anaerobic reactor (32). The anaerobic reactor (32) is connected in sequence to a water seal tank (21), a desulfurization device, a biogas compressor (27) and a biogas dryer (31) through the biogas pipeline (8).

10. The system for treating high-temperature brewing wastewater as described in claim 9, characterized in that: A three-way valve is installed after the desulfurization unit. One biogas pipeline (8) is connected to the biogas compressor (27) and the biogas refrigerated dryer (31), and the other biogas pipeline (8) is connected to the biogas spherical bulb (28) to store excess biogas.

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