Fermentation waste gas treatment device

Abstract

The utility model discloses a fermentation waste gas treatment device, which comprises a gas inlet pipe, a cyclone separator, a waste liquid treatment tank, an induced draft fan, an alkaline washing tower, an alkaline washing circulating pump, a spray pipe and a corresponding pipeline valve, the gas inlet pipe is connected with the cyclone separator, the lower part of the cyclone separator is connected with the waste liquid treatment tank, the waste liquid treatment tank is connected with a blow-off pipeline, and the blow-off pipeline is connected with the spray pipe. A hot water recovery port is formed in the upper part of the waste liquid treatment tank, an air outlet in the upper part of the cyclone separator is connected with the induced draft fan, the induced draft fan is connected with the alkaline washing tower, and a drain outlet in the lower part of the induced draft fan is connected with the waste liquid treatment tank through a pipeline. The equipment is simple in structure, low in price, firm, durable and convenient to operate, and the treatment efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of post-fermentation processing equipment, and particularly relates to a fermentation waste gas processing device. Background Art

[0002] At present, with the development of high-density aerobic fermentation, the continuous supply of oxygen during the cultivation process will inevitably produce a large amount of fermentation waste gas. In addition to the carbon dioxide, nitrogen, residual oxygen and other gases produced by fermentation, the fermentation waste gas is also accompanied by a certain amount of live bacteria and nutrients, especially for intermittent fermentation with continuous feeding. As the tank liquid level increases, liquid escape occurs from time to time. If the fermentation waste gas is not treated and allowed to be discharged into the atmosphere, it will not only pollute the environment, but also easily breed bacteriophages, causing devastating damage to fermentation production. The fermentation exhaust system also plays the role of controlling the pressure in the tank during the fermentation air elimination and actual elimination process. Therefore, a set of fermentation waste gas treatment equipment that is efficient, cheap, simple and durable, and can effectively treat live bacteria and nutrients in the fermentation waste gas is crucial to reducing production costs and reducing environmental pollution. Utility Model Content

[0003] To solve the above existing problems, a fermentation waste gas treatment device is provided, which has a simple structure, low price, strong and durable, easy to operate, and can greatly improve the treatment efficiency. The technical solution of the utility model is as follows:

[0004] A fermentation waste gas treatment device comprises: an air intake pipe connected to a fermentation tank; a gas-liquid separation mechanism, an induced draft fan and an alkali washing tower connected in sequence, wherein the front end of the gas-liquid separation mechanism is connected to the air intake pipe; a waste liquid treatment tank connected to the alkali washing tower via a sewage pipe; and the air intake pipe is connected to the waste liquid treatment tank via a hot water collection pipe.

[0005] In the embodiment of the utility model, the gas-liquid separation mechanism is a cyclone separator.

[0006] In the embodiment of the utility model, the lower part of the cyclone separator is connected to the waste liquid treatment tank; the upper air outlet is connected to the induced draft fan.

[0007] In the embodiment of the utility model, a U-shaped tube is arranged on the air inlet pipe, and the bottom of the U-shaped tube is connected to the hot water collecting pipe.

[0008] In the embodiment of the utility model, a hot water control valve is arranged on the top of the hot water collecting pipe, and the valve is kept slightly open to allow condensed water to flow out and a small amount of steam to pass through.

[0009] In the embodiment of the utility model, the water inlet of the waste liquid treatment tank is at the lower part, the water outlet is at the upper part, and a one-way valve is arranged in front of the water inlet of the waste liquid treatment tank.

[0010] In the embodiment of the utility model, the alkali washing tower is provided with two packing layers, including a lower packing layer and an upper packing layer, and a liquid collector and a distributor are arranged above the lower packing layer.

[0011] In an embodiment of the utility model, the lower part of the alkali washing tower is connected to the alkali washing tower drain valve and the alkali washing pump circulation valve through a pipeline, the alkali washing tower drain valve is connected to the waste liquid treatment tank through a pipeline, and the alkali washing pump circulation valve is connected to the spray pipe through a circulation pipe.

[0012] In the embodiment of the utility model, the spray pipe is located between two packing layers inside the alkali washing tower and above the liquid collector.

[0013] In the embodiment of the utility model, the circulation pipe is connected to the liquid alkali tank through an alkali liquid valve.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This device is equipped with a cyclone separator, which can separate the liquid and gas in the exhaust gas.

[0016] 2. This device is configured to pass the condensed water in the steam discharged from the fermentation tank into the waste liquid treatment tank through the hot water collection pipe. A U-shaped pipe is arranged at the connection between the air inlet pipe for conveying steam and the hot water collection pipe to collect the condensed water. The generated steam condensed water is collected into the waste liquid treatment tank by gravity to ensure the water temperature of the waste liquid treatment tank.

[0017] 3. The device is equipped with an induced draft fan to ensure that the gas will not flow back into the fermentation tank during operation, thus ensuring the aseptic culture of the fermentation tank.

[0018] 4. The device is provided with an alkali washing tower, and two layers of packing are arranged inside the alkali washing tower. The lower packing layer is used for circulating alkali liquid to kill live bacteria in the air, and at the same time absorbs carbon dioxide in the exhaust gas to reduce carbon dioxide emissions. The upper packing performs gas-liquid separation to reduce the amount of water in the air. The two layers of packing can effectively throttle the condensed water during the steam sterilization of the fermentation tank, so that the alkali washing tower does not need to be supplemented with water.

[0019] 5. All wastewater generated during the operation of this device is first treated in the waste liquid treatment tank before being discharged, which can effectively reduce the risk of device pollution.

[0020] 6. The device is equipped with an alkali washing circulation pump to realize the recycling of alkali solution and continuously treat the exhaust gas through the spray pipe and the lower packing layer.

[0021] 7. All components used in this device can withstand the high temperature during steam sterilization of the fermentation tank. At the same time, the steam sterilizes the entire system, which can effectively prevent the growth of miscellaneous bacteria.

[0022] 8. The device has a simple structure, low price, is durable, easy to operate, and can greatly improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0024] Figure 1 This is a structural schematic diagram of a fermentation waste gas treatment device provided by the utility model.

[0025] Among them, 1-inlet pipe, 2-cyclone separator, 3-waste liquid treatment tank, 4-induced draft fan, 5-alkali washing circulation pump, 6-alkali washing tower, 7-alkali washing tower lower layer packing, 8-alkali washing tower upper layer packing, 9-alkali washing tower drain valve, 10-alkali washing pump circulation valve, 11-alkali liquid valve, 12-circulation pipe, 13-spray pipe, 14-drain pipe, 15-liquid alkali tank, 16-fermentation tank, 17-hot water collection pipe, 31-check valve, 71-liquid distributor, 72-liquid collector, 171-hot water control valve. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] like Figure 1 As shown, a fermentation waste gas treatment device includes an air intake pipe 1, a cyclone separator 2, a waste liquid treatment tank 3, an induced draft fan 4, an alkali washing circulation pump 5, an alkali washing tower 6, an alkali washing tower drain valve 9, an alkali washing pump circulation valve 10, an alkali liquid valve 11, a circulation pipe 12, a spray pipe 13, a sewage pipe 14, and a liquid alkali tank 15.

[0029] The air inlet pipe 1 is a steam pipe, which is connected to the fermentation tank 16, and the steam in the fermentation tank 16 is introduced into the device for treatment; the air inlet pipe 1, the cyclone separator 2, the induced draft fan 4, and the alkali washing tower 6 are connected in sequence, the lower part of the cyclone separator 2 is connected to the sewage pipe 14, the waste liquid treatment tank 3 is connected to the sewage pipe 14, and a hot water collection pipe 17 branch is set on the air inlet pipe 1, and the hot water collection pipe 17 is connected to the upper part of the waste liquid treatment tank 3. As a typical embodiment, a U-shaped pipe is set on the air inlet pipe 1, and the bottom of the U-shaped pipe is connected to the hot water collection pipe 17, so that the condensed water flows into the waste liquid treatment tank 3 under the action of gravity.

[0030] The hot water collected by the hot water collection pipe 17 is the hot water generated by the jacket or inner coil when the fermentation tank is heated up, and the hot water discharged from the steam pipe. It has a certain pressure. When discharged, due to the existence of the hot water pressure, if it is directly discharged into the factory's sewage pipe, it will cause the entire pipe to be pressurized, affecting the sewage discharge of the entire system, and may even be discharged from other sewage outlets, which may easily cause scalding and environmental pollution accidents. The present application reduces this part of the pressure after buffering the hot water through the waste liquid treatment tank, which will not cause danger while maintaining the temperature of the waste liquid tank.

[0031] A hot water control valve 171 is provided at the top of the hot water collecting pipe 17, and the valve is kept slightly open to allow condensed water to flow out and a small amount of steam to pass through.

[0032] The upper part of the cyclone separator 2 is connected to the induced draft fan 4 .

[0033] The water inlet of the waste liquid treatment tank 3 is at the bottom, the water outlet is at the top, and a one-way valve 31 is arranged in front of the water inlet of the waste liquid treatment tank 3, so that the liquid separated by the cyclone separator can be sterilized before being discharged. The waste liquid treatment tank can be regularly added with disinfectant water according to the situation.

[0034] The alkali washing tower 6 is provided with two packing layers, namely, a lower packing 7 and an upper packing 8. A liquid collector 72 and a liquid distributor 71 are arranged above the lower packing 7 to improve the mass transfer efficiency of the lower packing 7.

[0035] The lower part of the alkali washing tower 6 is connected to a sewage pipe 14 and a circulation pipe 12 through pipelines respectively. A alkali washing tower drain valve 9 is set at the place where the alkali washing tower 6 is connected to the sewage pipe 14. An alkali washing pump circulation valve 10 and an alkali washing circulation pump 5 are set at the place where the alkali washing tower 6 is connected to the circulation pipe 12. The alkali washing tank 15 is connected to the circulation pipe 12 through an alkali liquid valve 11. The end of the circulation pipe 12 is connected to a spray pipe 13. The spray pipe 13 is located between the lower layer packing 7 and the upper layer packing 8 of the alkali washing tower inside the alkali washing tower and above the liquid collector 72.

[0036] Before using the device, close the drain valve 9 of the alkali washing tower, open the alkali liquid valve 11 and add liquid alkali to the alkali washing tower. When the fermentation tank is subjected to air disinfection and actual disinfection, the steam coming out of the fermentation tank 16 enters the cyclone separator 2 through the air inlet pipe 1, and a part of the steam condensate is enriched in the waste liquid treatment tank 3 through the lower port of the cyclone separator 2, thereby ensuring the sterilization effect of the hot water. Most of the steam enters the induced draft fan 4 through the upper port of the cyclone separator 2, and then enters the alkali washing tower 6 through the pipeline.

[0037] After the fermentation tank is cultured normally, open the alkali cleaning pump circulation valve 10, first open the induced draft fan 4 on the pipeline between the upper end of the cyclone separator 2 and the alkali cleaning tower 6, and then turn on the alkali cleaning circulation pump 5 to ensure that the exhaust gas generated by the fermentation tank can always flow in one direction and will not flow back into the fermentation tank, thereby avoiding the occurrence of bacterial contamination accidents. Under the action of the alkali cleaning circulation pump 5, the alkali solution in the device passes through the alkali cleaning pump circulation valve 10, the circulation pipe 12 and the spray pipe 13 from the bottom of the alkali cleaning tower 6 in turn, and is sprayed on the liquid distributor on the lower layer of the alkali cleaning tower 7. The alkali solution and the exhaust gas begin to circulate in the alkali cleaning tower.

[0038] The fermentation waste gas first enters the cyclone separator 2 through the air inlet pipe 1, and the gas and liquid are separated in the cyclone separator 2. The liquid in the lower part of the cyclone separator 2 enters the waste liquid treatment tank 3 through the drain pipe 14. The waste liquid treatment tank 3 continuously recycles the hot water and always maintains a temperature of not less than 50°C. At the same time, by adding disinfectant, it is ensured that the liquid entering the waste liquid treatment tank 3 can be fully sterilized and the discharged waste liquid does not contain live bacteria.

[0039] The separated gas enters the induced draft fan 4 and the alkali washing tower 6 in sequence through the top of the cyclone separator 2. The gas rises and meets the alkali solution flowing down from the spray pipe 13 in the lower packing 7 of the alkali washing tower. After the live bacteria and carbon dioxide are treated, the remaining gas enters the upper packing 8 of the alkali washing tower. The water vapor carried in the gas condenses into droplets in the upper packing 8 of the alkali washing tower and flows down. Finally, the gas is discharged into the atmosphere from the upper part of the alkali washing tower 6.

[0040] After continuous operation for a period of time, the liquid level in the alkali washing tower 6 increases due to the continuous air elimination operation, and the concentration of liquid alkali decreases due to the dual effects of absorbing carbon dioxide and increasing the liquid level. At this time, the alkali washing pump circulation valve 10 is stopped, the alkali liquid valve 11 is opened, and a part of the alkali liquid is discharged through the drain pipe 14, and then the alkali liquid valve 11 is closed, and the alkali liquid valve 11 is opened to add part of the liquid alkali into the tank, and the alkali washing pump circulation valve 10 is opened, and the equipment operates as usual.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fermentation waste gas treatment device, characterized in that: include: an air inlet pipe connected to the fermenter; A gas-liquid separation mechanism, an induced draft fan and an alkali scrubber are connected in sequence, and the front end of the gas-liquid separation mechanism is connected to an air inlet pipe; A waste liquid treatment tank connected to the alkali washing tower through a sewage pipe; The air inlet pipe is connected to the waste liquid treatment tank through a hot water collection pipe.

2. The device according to claim 1, characterized in that The gas-liquid separation mechanism is a cyclone separator.

3. The device according to claim 2, characterized in that The lower part of the cyclone separator is connected to the waste liquid treatment tank; the upper air outlet is connected to the induced draft fan.

4. The device according to claim 3, characterized in that A U-shaped tube is arranged on the air inlet pipe, and the bottom of the U-shaped tube is connected to a hot water collecting pipe.

5. The device according to claim 4, characterized in that A hot water control valve is arranged on the top of the hot water collecting pipe.

6. The device according to claim 1, characterized in that The water inlet of the waste liquid treatment tank is at the lower part, the water outlet is at the upper part, and a one-way valve is arranged in front of the water inlet of the waste liquid treatment tank.

7. The device according to claim 1, characterized in that The alkali washing tower is provided with two packing layers inside, including a lower packing layer of the alkali washing tower and an upper packing layer of the alkali washing tower. A liquid collector and a distributor are arranged above the lower packing layer.

8. The device according to claim 7, characterized in that The lower part of the alkali washing tower is connected to the alkali washing tower drain valve and the alkali washing pump circulation valve through a pipeline, the alkali washing tower drain valve is connected to the waste liquid treatment tank through a pipeline, and the alkali washing pump circulation valve is connected to the spray pipe through a circulation pipe.

9. The device according to claim 8, characterized in that The spray pipe is located between two packing layers inside the alkali washing tower and above the liquid collector.

10. The device according to claim 9, characterized in that The circulation pipe is connected with the liquid alkali tank through a alkali liquid valve.

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