A microbial fermentation exhaust gas treatment device

Abstract

This application provides a microbial fermentation exhaust gas treatment device, comprising a condenser, a first absorption tank, and a second absorption tank connected sequentially in the direction of fermentation exhaust gas transport, and a liquid collection assembly connected to the condenser. By setting up a condenser and placing a refrigerant inside it, water vapor in the fermentation exhaust gas can be efficiently condensed, greatly improving heat exchange efficiency compared to traditional condensation devices. The liquid collection assembly can collect the condensate generated during condensation in a timely manner, preventing the accumulation of condensate and the resulting reduction in heat exchange efficiency. The fermentation exhaust gas passes sequentially through the first absorbent in the first absorption tank and the second absorbent in the second absorption tank, allowing for more thorough separation of water vapor and pollutants, significantly reducing the VOCs content in the fermentation exhaust gas. It has the advantages of simple structure, high heat exchange efficiency, low implementation cost, high exhaust gas treatment quality, and ease of promotion and implementation.

Description

Technical Field

[0001] This application belongs to the field of waste gas treatment technology, specifically relating to a microbial fermentation tail gas treatment device. Background Technology

[0002] In existing technologies, microbial fermentation exhaust gas treatment devices play a crucial role in the modern biotechnology industry. They can treat the massive amounts of waste gas generated during high-density microbial fermentation processes in industries such as pharmaceuticals and food, removing pollutants such as VOCs, inorganic odors, and aerosols, thus preventing air pollution, ensuring that exhaust gas emissions meet standards, and safeguarding ecological safety and the sustainable development of the industry. However, current microbial fermentation exhaust gas treatment devices and related technologies on the market have some shortcomings.

[0003] In existing technologies, traditional tube-and-shell condensers can achieve partial condensation through the flow of cooling medium outside the tubes. However, the heat exchange area per unit volume of the tube-and-shell structure is relatively limited, and condensate tends to accumulate inside the tubes, affecting heat exchange efficiency. For large volumes of fermentation exhaust gas, the condensation efficiency needs improvement. Furthermore, the condensed exhaust gas is either directly discharged or only undergoes simple treatment, resulting in incomplete removal of odor components. While physical adsorption devices, such as activated carbon adsorption devices, can adsorb some pollutants, the frequent replacement of activated carbon leads to high operating costs. Single spray absorption technology, due to its limited treatment methods, is unable to handle the complex components in the exhaust gas, resulting in poor deodorization. In addition, the large volume of exhaust gas emissions caused by the extensive ventilation and oxygen supply during fermentation means that most existing exhaust gas treatment devices are large in scale and complex in structure, further increasing equipment investment and maintenance difficulties.

[0004] Therefore, improvements are urgently needed to comprehensively enhance the condensation efficiency and deodorization effect of the microbial fermentation exhaust gas treatment device, simplify the device structure, and reduce operating costs. Utility Model Content

[0005] In order to solve the technical problems in the prior art of microbial fermentation, such as low heat exchange efficiency of traditional condensation devices, easy accumulation of condensate which further reduces heat exchange efficiency, incomplete separation of water vapor and pollutants, and the presence of a large amount of VOCs in the exhaust gas after condensation treatment, this application proposes a microbial fermentation exhaust gas treatment device.

[0006] This application adopts the following scheme: a microbial fermentation tail gas treatment device, including a condenser, a first absorption tank, and a second absorption tank connected in sequence according to the fermentation tail gas conveying direction, and a liquid collection assembly connected to the condenser. The first absorption tank contains a first absorbent liquid, the condenser contains a refrigerant, and the second absorption tank contains a second absorbent liquid. The condenser is used to condense water vapor in the fermentation tail gas, and the liquid collection assembly is used to collect the condensate generated after condensing the fermentation tail gas. After being condensed by the condenser, the fermentation tail gas passes through the first absorbent liquid and the second absorbent liquid in sequence and is then discharged from the second absorption tank.

[0007] In some feasible embodiments, the condenser includes a tank body and a heat exchange assembly disposed within the tank body. The tank body has a liquid inlet at one end and a liquid outlet at the other end. The heat exchange assembly has an air inlet at one end and an air outlet at the other end. Fermentation exhaust gas enters the heat exchange assembly through the air inlet, and refrigerant enters the tank body through the liquid inlet and comes into contact with the heat exchange assembly to condense the water vapor in the fermentation exhaust gas.

[0008] In some feasible embodiments, the liquid collection assembly includes a branch pipe disposed on the gas outlet and a liquid collection tank disposed on the branch pipe, wherein the condensate generated after the fermentation tail gas is condensed by the heat exchange assembly can fall into the liquid collection tank.

[0009] In some feasible embodiments, the heat exchange assembly includes a split tube array and flow guides connected to the split tube array and detachably disposed at both ends of the split tube array. The flow guides are used to guide the fermentation exhaust gas into the split tube array, and the air inlet and the air outlet are respectively disposed on the two flow guides.

[0010] In some feasible embodiments, the split tube array includes a main heat exchange tube disposed in the middle of the flow guide and a plurality of auxiliary heat exchange tubes spaced around the outer periphery of the main heat exchange tube, wherein the diameter of the main heat exchange tube is larger than the diameter of the auxiliary heat exchange tubes.

[0011] In some feasible embodiments, the heat exchange assembly further includes a limiting component disposed on the split tube array, the limiting component being used to limit the swaying of the split tube array relative to the tank body.

[0012] In some feasible embodiments, the limiting components are provided at intervals along the length direction of the shunt tube group, the limiting components include limiting plates and multiple mounting holes provided on the limiting plates, and the shunt tube group is disposed in the mounting holes.

[0013] In some feasible embodiments, a support assembly is also included between the split tube array and the tank body. The support assembly includes a support flange on the inner wall of the tank body and a support plate detachably mounted on the split tube array. When the heat exchange assembly is located in the tank body, the support plate is mounted on the support flange.

[0014] In some feasible embodiments, an aeration assembly located at the bottom of the tank is also included, the aeration assembly being used to transport the refrigerant inside the tank to the heat exchange assembly.

[0015] In some feasible embodiments, the first absorbent is selected from any one of sodium hydroxide solution, potassium hydroxide solution, calcium hydroxide solution, sodium carbonate solution, sodium bicarbonate solution, and barium hydroxide solution.

[0016] In some feasible embodiments, the second absorbent is selected from any one of sodium hypochlorite solution, chlorine dioxide solution, and hydrogen peroxide solution.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] This application provides a microbial fermentation exhaust gas treatment device, comprising a condenser, a first absorption tank, and a second absorption tank connected sequentially in the direction of fermentation exhaust gas transport, and a liquid collection assembly connected to the condenser. By setting up a condenser and placing a refrigerant inside it, water vapor in the fermentation exhaust gas can be efficiently condensed, greatly improving heat exchange efficiency compared to traditional condensation devices. The liquid collection assembly can collect the condensate generated during condensation in a timely manner, preventing the accumulation of condensate and the resulting reduction in heat exchange efficiency. The fermentation exhaust gas passes sequentially through the first absorbent in the first absorption tank and the second absorbent in the second absorption tank, allowing for more thorough separation of water vapor and pollutants, significantly reducing the VOCs content in the fermentation exhaust gas. It has the advantages of simple structure, high heat exchange efficiency, low implementation cost, high exhaust gas treatment quality, and ease of promotion and implementation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a microbial fermentation tail gas treatment device according to this application;

[0020] Figure 2 This application Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the heat exchange component of this application;

[0022] Figure 4 This is a top view of the heat exchange component of this application;

[0023] Figure 5 This application Figure 4 Sectional view at point AA;

[0024] Figure 6 This application Figure 5 A magnified view of a section at point B in the middle;

[0025] Figure 7 This is an exploded structural diagram of the heat exchange component of this application. Detailed Implementation

[0026] Combination Figures 1 to 7 The following description further illustrates the technical solution proposed in this application. This application provides a microbial fermentation exhaust gas treatment device, comprising a condenser tank 1, a first absorption tank 2, and a second absorption tank 3 connected sequentially in the direction of fermentation exhaust gas transport, and a liquid collection assembly 9 connected to the condenser tank 1 via a pipeline. The first absorption tank 2 contains a first absorbent liquid X, the condenser tank 1 contains a refrigerant, and the second absorption tank 3 contains a second absorbent liquid Y. The condenser tank 1 is used to condense water vapor in the fermentation exhaust gas, and the liquid collection assembly 9 is used to collect the condensate produced after condensing the fermentation exhaust gas. After condensation in the condenser tank, the fermentation exhaust gas passes sequentially through the first absorbent liquid X and the second absorbent liquid Y before being discharged from the second absorption tank 3.

[0027] This application provides a microbial fermentation exhaust gas treatment device, comprising a condenser, a first absorption tank, and a second absorption tank connected sequentially in the direction of fermentation exhaust gas transport, and a liquid collection assembly connected to the condenser. By setting up a condenser and placing a refrigerant inside it, water vapor in the fermentation exhaust gas can be efficiently condensed, greatly improving heat exchange efficiency compared to traditional condensation devices. The liquid collection assembly can collect the condensate generated during condensation in a timely manner, preventing the accumulation of condensate and the resulting reduction in heat exchange efficiency. The fermentation exhaust gas passes sequentially through the first absorbent in the first absorption tank and the second absorbent in the second absorption tank, allowing for more thorough separation of water vapor and pollutants, significantly reducing the VOCs content in the fermentation exhaust gas. It has the advantages of simple structure, high heat exchange efficiency, low implementation cost, high exhaust gas treatment quality, and ease of promotion and implementation.

[0028] In this embodiment, the condenser 1 includes a tank body 4 and a heat exchange component 5 disposed inside the tank body 4. One end of the tank body 4 is provided with a liquid inlet 40 and the other end is provided with a liquid outlet 41. One end of the heat exchange component 5 is provided with an air inlet 50 and the other end is provided with an air outlet 51. Fermentation exhaust gas enters the heat exchange component 5 through the air inlet 50, and refrigerant enters the tank body 4 through the liquid inlet 40 and comes into contact with the heat exchange component 5 to condense the water vapor in the fermentation exhaust gas.

[0029] In actual implementation, the fermentation exhaust gas passes sequentially through a condenser, a first absorption tank, and a second absorption tank, following the transport direction. In the condenser, refrigerant is introduced through an inlet at one end of the tank. The refrigerant flows around a heat exchange component located inside the tank. Simultaneously, the fermentation exhaust gas enters through an inlet at one end of the heat exchange component, exchanging heat with the refrigerant within the component. Water vapor in the exhaust gas liquefies upon cooling, achieving efficient condensation and solving the problem of low heat exchange efficiency in traditional condensation devices. A collection component connected to the condenser collects the condensate in a timely manner, preventing excessive accumulation of condensate on the tank or heat exchange component surface, thus avoiding a reduction in subsequent heat exchange efficiency. The exhaust gas exiting the condenser enters the first absorption tank containing the first absorbent liquid X, where some pollutants are absorbed. The exhaust gas then enters the second absorption tank containing the second absorbent liquid Y for further absorption and purification. Finally, relatively clean exhaust gas is discharged from the second absorption tank, achieving complete separation of water vapor and pollutants and effectively reducing the VOCs content in the exhaust gas.

[0030] In actual implementation, the condenser is equipped with an observation window, which is used to observe the flow of refrigerant inside the condenser.

[0031] In actual implementation, the refrigerant can be selected according to the actual heat exchange requirements. When treating large quantities of waste gas, water is preferred as the refrigerant.

[0032] In this embodiment, the liquid collection component 9 includes a branch pipe provided on the gas outlet 51 and a liquid collection tank 90 provided on the branch pipe. The condensate generated after the fermentation tail gas is condensed by the heat exchange component 5 can fall into the liquid collection tank 90.

[0033] In actual implementation, after the fermentation waste gas is condensed by the heat exchange component 5 in the condenser, it carries the liquid condensate generated during the condensation process and is discharged from the outlet 51 of the heat exchange component 5. By setting a branch pipe at an angle at the outlet 51, when the exhaust gas is discharged, the condensate carried by it is separated from the exhaust gas by gravity and drips naturally down the branch pipe into the collection tank 90 below; this achieves immediate collection of condensate and prevents condensate from entering downstream equipment with the exhaust gas or accumulating in the condenser, thus avoiding a reduction in the heat exchange efficiency between the heat exchange component and the refrigerant.

[0034] In this embodiment, the heat exchange component 5 includes a split tube array 52 and flow guides 53 connected to the split tube array 52 and detachably disposed at both ends of the split tube array 52. ​​The flow guides 53 are used to guide the fermentation exhaust gas into the split tube array 52. ​​The air inlet 50 and the air outlet 51 are respectively disposed on the two flow guides 53.

[0035] In this embodiment, the split tube array 52 includes a main heat exchange tube 520 located in the middle of the flow guide 53, and a plurality of auxiliary heat exchange tubes 521 spaced around the outer periphery of the main heat exchange tube 520. The diameter of the main heat exchange tube 520 is larger than the diameter of the auxiliary heat exchange tubes 521.

[0036] In actual implementation, fermentation exhaust gas enters through the inlet, and the guide vanes direct the exhaust gas into the split tube array. Once the exhaust gas is guided to the split tube array, a portion enters the main heat exchange tube, while the remaining exhaust gas is distributed to multiple secondary heat exchange tubes. The large number of secondary heat exchange tubes increases the contact area between the exhaust gas and the tube walls, allowing for more efficient heat transfer and achieving a highly efficient heat exchange process. After heat exchange, the exhaust gas exits through the outlet, which is located on another guide vane, completing the entire heat exchange process.

[0037] In actual implementation, by setting up main / secondary heat exchange tubes with a diameter difference between them, the main heat exchange tube first undertakes the initial heat exchange of a portion of the larger flow of exhaust gas, while the secondary heat exchange tube increases the heat exchange area, so that the heat in the exhaust gas can be absorbed more effectively.

[0038] In this embodiment, the heat exchange assembly 5 also includes a limiting component 6 disposed on the diversion tube group 52, the limiting component 6 being used to limit the diversion tube group 52 from shaking relative to the tank body 4.

[0039] In this embodiment, the limiting component 6 is provided with multiple spaced parts along the length direction of the diversion tube group 52. The limiting component 6 includes a limiting plate 60 and multiple mounting holes 61 provided on the limiting plate 60. The diversion tube group 52 is provided in the mounting holes 61.

[0040] In actual implementation, the fermentation exhaust gas flows inside the split tube assembly, while the refrigerant flows outside the split tube assembly. During heat exchange, the split tube assembly will experience swaying. The limiting plate in the limiting assembly is installed in the mounting hole through the split tube assembly, which can limit its radial and axial swaying, ensuring the stable operation of the split tube assembly, and thus ensuring the heat exchange stability of the heat exchange assembly.

[0041] In this embodiment, a support component 7 is also provided between the diversion tube assembly 52 and the tank 4. The support component 7 includes a support flange 70 provided on the inner wall of the tank 4 and a support plate 71 detachably provided on the diversion tube assembly 52. ​​When the heat exchange component 5 is provided inside the tank 4, the support plate 71 is mounted on the support flange 70.

[0042] In this embodiment, an aeration assembly 8 is also provided at the bottom of the tank 4. The aeration assembly 8 is used to transport the refrigerant in the tank 4 to the heat exchange assembly 5.

[0043] In actual implementation, the refrigerant is transported to the vicinity of the heat exchange component through the aeration component, increasing the refrigerant flow rate outside the heat exchange component, thereby enabling the refrigerant to fully contact the heat exchange component, effectively improving the heat exchange efficiency and effectively shortening the cooling time of the fermentation tail gas.

[0044] In actual implementation, by setting up aeration components at the bottom of the tank, the uniformity of refrigerant temperature distribution can be effectively improved, the uniformity of heat exchange of fermentation waste gas can be improved, and thus the heat exchange efficiency can be improved.

[0045] In this embodiment, the first absorbent X is selected from any one of sodium hydroxide solution, potassium hydroxide solution, calcium hydroxide solution, sodium carbonate solution, sodium bicarbonate solution, and barium hydroxide solution;

[0046] The second absorbent Y can be any one of sodium hypochlorite solution, chlorine dioxide solution, or hydrogen peroxide solution.

[0047] In actual implementation, sodium hydroxide solution is selected as the first absorbent X, and sodium hypochlorite solution is selected as the second absorbent Y.

[0048] This application provides a microbial fermentation exhaust gas treatment device, comprising a condenser, a first absorption tank, and a second absorption tank connected sequentially in the direction of fermentation exhaust gas transport, and a liquid collection assembly connected to the condenser. By setting up a condenser and placing a refrigerant inside it, water vapor in the fermentation exhaust gas can be efficiently condensed, greatly improving heat exchange efficiency compared to traditional condensation devices. The liquid collection assembly can collect the condensate generated during condensation in a timely manner, preventing the accumulation of condensate and the resulting reduction in heat exchange efficiency. The fermentation exhaust gas passes sequentially through the first absorbent in the first absorption tank and the second absorbent in the second absorption tank, allowing for more thorough separation of water vapor and pollutants, significantly reducing the VOCs content in the fermentation exhaust gas. It has the advantages of simple structure, high heat exchange efficiency, low implementation cost, high exhaust gas treatment quality, and ease of promotion and implementation.

[0049] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A microbial fermentation tail gas treatment device, characterized in that, The system includes a condenser (1), a first absorption tank (2), and a second absorption tank (3) connected in sequence by pipelines in the direction of fermentation exhaust gas transportation, and a liquid collection assembly (9) connected by pipelines to the condenser (1). The first absorption tank (2) contains a first absorbent liquid (X), the condenser (1) contains a refrigerant, and the second absorption tank (3) contains a second absorbent liquid (Y). The condenser (1) is used to condense the water vapor in the fermentation exhaust gas, and the liquid collection assembly (9) is used to collect the condensate produced after condensing the fermentation exhaust gas. After the fermentation exhaust gas is condensed by the condenser, it passes through the first absorbent liquid (X) and the second absorbent liquid (Y) in sequence and is then discharged from the second absorption tank (3).

2. The microbial fermentation tail gas treatment device according to claim 1, characterized in that, The condenser (1) includes a tank body (4) and a heat exchange component (5) disposed in the tank body (4). One end of the tank body (4) is provided with a liquid inlet (40) and the other end is provided with a liquid outlet (41). One end of the heat exchange component (5) is provided with an air inlet (50) and the other end is provided with an air outlet (51). Fermentation exhaust gas enters the heat exchange component (5) through the air inlet (50). Refrigerant enters the tank body (4) through the liquid inlet (40) and comes into contact with the heat exchange component (5) to condense the water vapor in the fermentation exhaust gas.

3. The microbial fermentation tail gas treatment device according to claim 2, characterized in that, The liquid collection assembly (9) includes a branch pipe inclined on the gas outlet (51) and a liquid collection tank (90) on the branch pipe. The condensate generated after the fermentation tail gas is condensed by the heat exchange assembly (5) can fall into the liquid collection tank (90).

4. The microbial fermentation tail gas treatment device according to claim 2, characterized in that, The heat exchange assembly (5) includes a split tube array (52) and flow guides (53) connected to the split tube array (52) and detachably disposed at both ends of the split tube array (52). The flow guides (53) are used to guide the fermentation exhaust gas into the split tube array (52). The air inlet (50) and the air outlet (51) are respectively disposed on the two flow guides (53).

5. The microbial fermentation tail gas treatment device according to claim 4, characterized in that, The split tube array (52) includes a main heat exchange tube (520) located in the middle of the flow guide (53) and a plurality of auxiliary heat exchange tubes (521) spaced around the outer periphery of the main heat exchange tube (520). The diameter of the main heat exchange tube (520) is larger than the diameter of the auxiliary heat exchange tubes (521).

6. The microbial fermentation tail gas treatment device according to claim 4, characterized in that, The heat exchange assembly (5) further includes a limiting component (6) disposed on the diversion tube assembly (52), the limiting component (6) being used to limit the diversion tube assembly (52) from swaying relative to the tank body (4).

7. The microbial fermentation tail gas treatment device according to claim 6, characterized in that, The limiting component (6) is provided with a plurality of spaced parts along the length direction of the diversion tube group (52). The limiting component (6) includes a limiting plate (60) and a plurality of mounting holes (61) provided on the limiting plate (60). The diversion tube group (52) is provided in the mounting holes (61).

8. The microbial fermentation tail gas treatment device according to claim 4, characterized in that, It also includes a support assembly (7) disposed between the split tube assembly (52) and the tank (4). The support assembly (7) includes a support flange (70) disposed on the inner wall of the tank (4) and a support plate (71) detachably disposed on the split tube assembly (52). When the heat exchange assembly (5) is disposed inside the tank (4), the support plate (71) is mounted on the support flange (70).

9. The microbial fermentation tail gas treatment device according to claim 3, characterized in that, It also includes an aeration assembly (8) located at the bottom of the tank (4), the aeration assembly (8) being used to transport the refrigerant in the tank (4) to the heat exchange assembly (5).

10. The microbial fermentation tail gas treatment device according to claim 1, characterized in that, The first absorbent (X) is selected from any one of sodium hydroxide solution, potassium hydroxide solution, calcium hydroxide solution, sodium carbonate solution, sodium bicarbonate solution, and barium hydroxide solution; The second absorbent (Y) is selected from any one of sodium hypochlorite solution, chlorine dioxide solution, and hydrogen peroxide solution.

Images