Digestion furnace tail gas treatment system for detecting protein

Abstract

The utility model relates to a digestion furnace tail gas treatment system for detecting protein, which comprises an alkali liquor reaction tank, an alkali liquor supplementing tank, a gas-liquid reaction pipe, a first peristaltic pump and a second peristaltic pump, a first suction pipe is arranged in the alkali liquor reaction tank, the first suction pipe is communicated with the gas-liquid reaction pipe through a tee joint, and the other end of the tee joint is unidirectionally communicated with the exhaust end of a digestion furnace; the other end of the gas-liquid reaction pipe is communicated with a liquid inlet of the first peristaltic pump, and a liquid outlet of the first peristaltic pump is connected with the alkali liquor reaction tank; a second suction pipe is arranged in the alkali liquor supplementing tank and is communicated with a liquid inlet of the second peristaltic pump, and a liquid outlet of the second peristaltic pump is communicated with the alkali liquor reaction tank; a pH value sensor is arranged in the alkali liquor reaction tank and is electrically connected with the second peristaltic pump, and the first peristaltic pump enables alkali liquor in the alkali liquor reaction tank to circularly flow and absorb tail gas, so that heating can be reduced, and the tail gas absorption efficiency can be improved; the second peristaltic pump is automatically started based on the pH value in the alkali liquor reaction tank to supplement consumption of alkali liquor in the alkali liquor reaction tank so as to continuously absorb tail gas.

Description

Technical Field

[0001] This application belongs to the technical field of protein assay equipment, and specifically relates to a digester exhaust gas treatment system for detecting proteins. Background Technology

[0002] The Kjeldahl method, a primary method for protein detection in food, is typically used in digestion furnaces for protein analysis. This process generates a large amount of sulfur dioxide gas during digestion. To prevent this gas from escaping into the atmosphere and causing pollution, existing technologies mainly employ water dissolution or alkaline absorption methods. However, water dissolution wastes a significant amount of water resources. Chinese utility model patent CN211877582U discloses a digestion furnace equipped with a tail gas treatment device, including an exhaust hood... The device comprises an inlet pipe, an absorption throat, an alkali tank, an alkali circulation pump, and an alkali return pipe. A detachable exhaust hood is mounted above the furnace body. The alkali tank is located on the side of the furnace body. The absorption throat is positioned above the alkali tank, with its lower end connected to the alkali tank. One end of the inlet pipe is located at the end of the exhaust hood, and the other end is located on the side wall of the absorption throat. The alkali circulation pump is located on the side of the alkali tank, with its suction end connected to the bottom of the alkali tank via a pipeline. One end of the alkali return pipe is located at the output end of the alkali circulation pump, and the other end is located at the top of the absorption throat. While this device can purify the exhaust gas generated by the digester to some extent, its processing efficiency gradually decreases as the alkali in the tank is consumed. Furthermore, to maintain airtightness during continuous circulation, the alkali tank lacks an opening for replenishing alkali, making timely replenishment inconvenient and posing a risk of harmful gas leakage due to purification failure. Summary of the Invention

[0003] Based on the aforementioned technical needs, this application provides a digester exhaust gas treatment system for protein detection, which addresses the problem in the prior art where exhaust gas treatment efficiency gradually decreases as alkali in the alkali tank is consumed, and it is inconvenient to replenish alkali in a timely manner, leading to the risk of harmful gas leakage due to purification failure.

[0004] To achieve the above objectives, the technical solution of this application is as follows:

[0005] A digester exhaust gas treatment system for protein detection includes an alkaline reaction tank, an alkaline replenishment tank, a gas-liquid reaction pipe, a first peristaltic pump, and a second peristaltic pump. A first suction pipe is installed in the alkaline reaction tank. One end of the first suction pipe is connected to one end of the gas-liquid reaction pipe via a tee. The other end of the tee is connected to the exhaust end of the digester via a first one-way valve. The other end of the gas-liquid reaction pipe is connected to the inlet of the first peristaltic pump, and the outlet of the first peristaltic pump is reconnected to the alkaline reaction tank. A second suction pipe is installed in the alkaline replenishment tank. The inlet of the second peristaltic pump is connected to the second suction pipe, and its outlet is connected to the alkaline reaction tank. A pH sensor is installed in the alkaline reaction tank and is electrically connected to the second peristaltic pump.

[0006] Preferably, a stirrer is provided in the alkaline reaction tank.

[0007] Preferably, the bottom of the alkaline reaction tank is provided with a drain outlet, and a drain valve is provided on the drain outlet.

[0008] Preferably, the drain valve includes an automatic drain valve that can be opened or closed based on liquid level information, and a liquid level sensor is provided in the alkaline reaction tank, the liquid level sensor being electrically connected to the automatic drain valve.

[0009] Preferably, the digester exhaust gas treatment system further includes an alarm that can emit, but is not limited to, audible and visual alarms based on liquid level information, and the alarm is electrically connected to the liquid level sensor.

[0010] Preferably, the top of the alkaline reaction tank is provided with an exhaust port, and a second one-way valve is provided at the exhaust port, the second one-way valve enabling one-way communication between the inside and outside of the alkaline reaction tank.

[0011] Preferably, the digester tail gas treatment system further includes a carbon removal tank, which stores carbon removal reagents and is equipped with an air inlet pipe, one end of which extends out of the carbon removal tank; the top of the alkaline reaction tank and the alkaline replenishment tank are both equipped with a gas replenishment pipe, and one end of the gas replenishment pipe is connected to the gas phase space in the carbon removal tank.

[0012] Preferably, a water-cooled jacket is fitted around the outside of the alkaline reaction tank. The water-cooled jacket is connected to a supply pipe and a drain pipe, and both the supply pipe and the drain pipe are connected to a water source for circulation.

[0013] Preferably, a heat exchange tube is coiled around the outside of the gas-liquid reaction tube, and one end of the heat exchange tube is connected to the liquid supply tube.

[0014] By adopting the above technical solution, compared with the prior art, this application has at least the following beneficial effects:

[0015] First, the first one-way valve can prevent the alkaline solution in the reaction tank from entering the exhaust end of the digester and can also prevent the tail gas from flowing back towards the digester. In conjunction with the first peristaltic pump, the alkaline solution pre-treats the tail gas in the gas-liquid reaction tube during the circulation process. This can avoid excessive heat generation of the alkaline solution during centralized treatment, improve safety, reduce the evaporation rate of the alkaline solution, save alkaline solution consumption, and improve the tail gas absorption efficiency.

[0016] Second, the pH sensor monitors the acidity and alkalinity in the alkaline reaction tank in real time and automatically starts the second peristaltic pump when the alkalinity drops to a preset value to replenish the alkaline solution consumed in the alkaline reaction tank, so that the alkaline solution in the alkaline reaction tank maintains its ability to treat exhaust gas and improves the continuity of the system's absorption of exhaust gas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the digester tail gas treatment system in the embodiment.

[0018] In the diagram: 1. Alkali reaction tank; 2. Alkali replenishment tank; 3. Gas-liquid reaction pipe; 4. First peristaltic pump; 5. Second peristaltic pump; 6. First suction pipe; 7. T-junction; 8. First check valve; 9. pH sensor; 10. Stirrer; 11. Drain outlet; 12. Drain valve; 13. Alarm; 14. Exhaust outlet; 15. Second check valve; 16. Carbon removal tank; 17. Air inlet pipe; 18. Air replenishment pipe; 19. Water cooling jacket; 20. Liquid supply pipe; 21. Drain pipe; 22. Heat exchange pipe; 23. Liquid level sensor; 24. Second suction pipe. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of this application will be further described below with reference to the accompanying drawings of the embodiments, and this application is not limited to the following specific implementation methods.

[0020] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "inner," "outer," "left," "right," "front," "rear," "top," and "bottom" indicate directions or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] The following is in conjunction with the appendix Figure 1 The present application will be further described in detail with reference to specific embodiments.

[0022] This application discloses a digester exhaust gas treatment system for protein detection. The system includes an alkaline reaction tank 1, an alkaline replenishment tank 2, a gas-liquid reaction pipe 3, a first peristaltic pump 4, and a second peristaltic pump 5. The alkaline reaction tank 1... Both the alkali replenishment tank 2 and the alkali reaction tank 1 are containers with lids on top. A first suction tube 6 is inserted into the alkali reaction tank 1. The upper end of the first suction tube 6 is connected to one end of the gas-liquid reaction pipe 3 through a three-way valve 7. The other end of the three-way valve 7 is connected to the exhaust end of the digester. A first one-way valve 8 is installed between the three-way valve 7 and the digester. The first one-way valve 8 only allows the gas discharged from the digester to flow into the three-way valve 7. The other end of the gas-liquid reaction pipe 3 is connected to the inlet of the first peristaltic pump 4. The outlet of the first peristaltic pump 4 is connected back to the alkali reaction tank 1. A second suction tube 24 is installed in the alkali replenishment tank 2. The inlet of the second peristaltic pump 5 is connected to the second suction tube 24. The outlet of the second peristaltic pump 5 is connected to the alkali reaction tank 1. A pH sensor 9 is also installed in the alkali reaction tank 1. The pH sensor 9 is electrically connected to the second peristaltic pump 5.

[0023] Specifically, the second peristaltic pump 5 mentioned above is an electric peristaltic pump that can be started or stopped based on the pH value of the alkaline solution.

[0024] When using the above-mentioned digester tail gas treatment system, a certain amount of alkali solution is pre-stored in the alkali reaction tank 1. The first peristaltic pump 4 is started so that the alkali solution in the alkali reaction tank 1 flows back to the alkali reaction tank 1 through the first suction pipe 6, the gas-liquid reaction pipe 3, and the first peristaltic pump 4. During the flow of alkali solution, a pressure difference is formed on both sides of the first one-way valve, so that the sulfur-containing tail gas (sulfur dioxide) meets and reacts with the alkali solution through the first one-way valve 8 to generate sulfurous acid, which quickly flows back to the alkali reaction tank 1 to neutralize with the alkali solution, thereby eliminating the harmful sulfide gases in the tail gas. The pH sensor 9 in the alkali reaction tank 1 monitors the pH value of the alkali solution in real time. The second peristaltic pump 5 is set to start when the pH value is less than 8.0, supplying the alkali solution in the alkali replenishment tank 2 into the alkali reaction tank 1 to increase the pH value of the reaction solution. When the pH value is not less than 9.0, the second peristaltic pump 5 stops, so that the proportion of alkali solution in the alkali reaction tank 1 is kept in excess to ensure that the sulfides in the tail gas can be continuously eliminated.

[0025] Using the above-mentioned digester tail gas treatment system has at least the following beneficial effects:

[0026] First, the first one-way valve 8 can prevent the alkaline solution in the alkaline reaction tank 1 from entering the exhaust end of the digester, and can also prevent the tail gas from flowing back towards the digester. In conjunction with the first peristaltic pump 4, the alkaline solution pre-treats the tail gas in the gas-liquid reaction pipe 3 during the circulation process. This can avoid excessive heat generation of the alkaline solution during centralized treatment, improve safety, reduce the evaporation rate of the alkaline solution, save alkaline solution consumption, and improve the tail gas absorption efficiency.

[0027] Second, the pH sensor monitors the acidity and alkalinity of the alkaline reaction tank 1 in real time and automatically starts the second peristaltic pump 5 when the alkalinity drops to the preset value to replenish the alkaline solution consumed in the alkaline reaction tank 1, so that the alkaline solution in the alkaline reaction tank 1 maintains its ability to treat exhaust gas and improves the continuity of the system's absorption of exhaust gas.

[0028] Based on the above embodiments, this application also provides further embodiments to improve the above digester tail gas treatment system.

[0029] In one embodiment, a stirrer 10 is provided in the alkaline reaction tank 1. Specifically, the stirrer 10 includes a drive motor and a stirring rod. The drive motor is located at the top of the alkaline reaction tank 1 with its output end pointing vertically downward and connected to the stirring rod. The lower end of the stirring rod is provided with stirring blades. The drive motor drives the stirring rod to stir the reaction liquid in the alkaline reaction tank 1, which can accelerate the reaction area between the alkaline solution and sulfur dioxide, increase the tail gas absorption rate, and make the pH value of the reaction liquid change more obvious, which helps the pH value sensor to accurately monitor the acidity and alkalinity of the reaction liquid.

[0030] In another embodiment, in order to facilitate the replacement of reaction waste liquid in the alkaline reaction tank 1, a drain port 11 is provided at the bottom of the alkaline reaction tank 1, and a drain valve 12 is provided on the drain port 11.

[0031] When the exhaust gas treatment operation is completed, or when the pH value of the solution in the alkaline reaction tank 1 is too low or the liquid level in the alkaline reaction tank 1 is too high, open the drain valve 12 to discharge part or all of the reaction liquid.

[0032] Furthermore, the aforementioned drain valve 12 is an automatic drain valve that can be opened or closed based on liquid level information, such as an electric valve with settable parameters. A liquid level sensor 23 is installed in the aforementioned alkaline reaction tank 1, and the liquid level sensor 23 is electrically connected to the automatic drain valve. After setting the highest liquid level parameter for opening the automatic drain valve and the lowest liquid level parameter for closing it, based on the liquid level monitoring of the alkaline solution in the alkaline reaction tank 1 by the liquid level sensor 23, the automatic drain valve can open to discharge part of the liquid when the liquid level is higher than the set value. The purpose is to avoid the risk of overflow caused by excessively high liquid level in the alkaline reaction tank 1 or the risk of excessively rapid heating of the reaction liquid caused by excessively low liquid level, thereby improving the safety of the exhaust gas treatment system.

[0033] Furthermore, the system also includes an alarm 13 that can emit alarm signals, including but not limited to audible and visual alarms, based on the liquid level sensor 23. The alarm 13 is electrically connected to the liquid level sensor 23 and can issue an alarm based on the liquid level height information monitored by the liquid level sensor 23. Specifically, when the liquid level in the alkaline reaction tank 1 is too high or too low, the alarm 13 emits audible and / or visual alarm signals, indicating a risk of alkaline leakage or excessively high temperature in the alkaline reaction tank 1, further improving the system's safety and adaptability.

[0034] In the above embodiment, an exhaust port 14 is provided at the top of the alkaline reaction tank 1, and a second one-way valve 15 is provided at the exhaust port 14. The second one-way valve 15 allows one-way communication between the inside of the alkaline reaction tank 1 and the outside. During the process of reacting and absorbing the tail gas in the alkaline reaction tank 1, the exhaust port 14 can release heat and purified gas to the outside, avoiding the accumulation of heat and gas pressure inside the alkaline tank and improving the safety of use.

[0035] In any of the above embodiments, the system further includes a carbon removal tank 16, which stores a carbon removal reagent, such as calcium hydroxide solution. An air inlet pipe 17 is provided in the carbon removal tank 16, and the other end of the air inlet pipe 17 extends out of the carbon removal tank 16. The top of the alkaline reaction tank 1 and the alkaline replenishment tank 2 are both provided with a gas replenishment pipe 18, and one end of the gas replenishment pipe 18 is connected to the gas phase space above the carbon removal reagent in the carbon removal tank 16.

[0036] Specifically, the top of the carbon removal tank 16 is equipped with a sealing cover, and the air supply pipes 18 all extend to and communicate with the sealing cover. When the first peristaltic pump 4 and the second peristaltic pump 5 are working, in order to balance the air pressure in the alkali reaction tank 1 and the alkali replenishment tank 2 and prevent negative pressure, the air inlet pipe 17 draws in air and removes carbon dioxide from the air through the carbon removal reagent, and then enters the alkali reaction tank 1 and the alkali replenishment tank 2 respectively through the air supply pipes 18. This can balance the air pressure, ensure the continuous operation of the two pumps, reduce the carbon dioxide content in the system, reduce the consumption of carbon dioxide in the alkali solution, and save materials.

[0037] In another embodiment, in order to reduce the temperature of the alkaline reaction tank 1 during the tail gas treatment process, a water-cooling jacket 19 is provided on the outside of the alkaline reaction tank 1. The water-cooling jacket 19 is a cylinder with a hollow jacket, and its inner side can fit snugly on the outside of the alkaline reaction tank 1. The water-cooling jacket 19 is connected to a liquid supply pipe 20 and a liquid discharge pipe 21, both of which are connected to a water source for circulation.

[0038] Specifically, the water source is a flowing cooling water network or a cold water pool, which is connected to the liquid supply pipe 20 through a valve or a water supply pump. Opening the valve or starting the water supply pump allows the cooling water to circulate between the water source and the water-cooled jacket 19, which can reduce the heat generation of the alkaline reaction tank 1, further improve the safety of the system and the continuity of tail gas treatment, and avoid the waste of cooling water.

[0039] In this embodiment, a heat exchange tube 22 is coiled around the outside of the gas-liquid reaction tube 3. One end of the heat exchange tube 22 is connected to the liquid supply tube 20, and the other end can be connected back to the water source. The cooling water circulates through the heat exchange tube 22 to reduce the temperature of the gas-liquid reaction tube 3, thereby preventing the heat exchange tube 22 from overheating locally and the first peristaltic pump 4 from overheating too quickly. This effectively reduces the amount of evaporation of the reaction liquid and improves the continuity and safety of the system.

[0040] Combining the various structures and features in the above embodiments, the corresponding functions of the digester tail gas treatment system for detecting proteins are improved, enabling it to purify the sulfur-laden tail gas of the digester with low raw material loss and high efficiency, and has good economy, applicability and safety.

[0041] Obviously, the above embodiments of this application are merely examples for clearly illustrating this application, and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A digester exhaust gas treatment system for protein detection, used to treat the exhaust gas from a digester, characterized in that, The system includes an alkaline reaction tank, an alkaline replenishment tank, a gas-liquid reaction pipe, a first peristaltic pump, and a second peristaltic pump. A first suction pipe is installed in the alkaline reaction tank. One end of the first suction pipe is connected to one end of the gas-liquid reaction pipe via a tee. The other end of the tee is connected to the exhaust end of the digester via a first one-way valve. The other end of the gas-liquid reaction pipe is connected to the inlet of the first peristaltic pump, and the outlet of the first peristaltic pump is reconnected to the alkaline reaction tank. A second suction pipe is installed in the alkaline replenishment tank. The inlet of the second peristaltic pump is connected to the second suction pipe, and its outlet is connected to the alkaline reaction tank. A pH sensor is installed in the alkaline reaction tank and is electrically connected to the second peristaltic pump.

2. The digester tail gas treatment system as described in claim 1, characterized in that, A stirrer is installed in the alkaline reaction tank.

3. The digester tail gas treatment system as described in claim 1, characterized in that, The bottom of the alkaline reaction tank is provided with a drain outlet, and a drain valve is provided on the drain outlet.

4. The digester tail gas treatment system as described in claim 3, characterized in that, The drain valve includes an automatic drain valve that can be opened or closed based on liquid level information. A liquid level sensor is installed in the alkaline reaction tank, and the liquid level sensor is electrically connected to the automatic drain valve.

5. The digester tail gas treatment system as described in claim 4, characterized in that, It also includes an alarm that can emit, but is not limited to, sound and light, based on liquid level information, and the alarm is electrically connected to the liquid level sensor.

6. The digester tail gas treatment system as described in claim 1, characterized in that, The alkaline reaction tank is provided with an exhaust port at the top, and a second one-way valve is provided at the exhaust port. The second one-way valve enables one-way communication between the inside and outside of the alkaline reaction tank.

7. The digester tail gas treatment system according to any one of claims 1 to 6, characterized in that, It also includes a carbon removal tank, which stores carbon removal reagent and is equipped with an air inlet pipe, one end of which extends out of the carbon removal tank; the top of the alkaline reaction tank and the alkaline replenishment tank are both equipped with air replenishment pipes, and one end of each air replenishment pipe is connected to the gas phase space in the carbon removal tank.

8. The digester tail gas treatment system as described in claim 1, characterized in that, The alkaline reaction tank is fitted with a water-cooled jacket, which is connected to a supply pipe and a drain pipe. Both the supply pipe and the drain pipe are connected to a water source for circulation.

9. The digester tail gas treatment system as described in claim 8, characterized in that, A heat exchange tube is coiled around the outside of the gas-liquid reaction tube, and one end of the heat exchange tube is connected to the liquid supply tube.

Images