A system for recycling tail gas from mulberry branch fungus fermentation

Abstract

This utility model relates to the field of fermentation equipment technology, specifically a system for recycling fermentation exhaust gas from *Mulberry Branch Fungus*. The system includes a fermenter with a gas circulation mechanism comprising a filter assembly, a condenser assembly, and a loop pipe. The filter assembly contains several filter elements. A fan is installed between the loop pipe and the condenser assembly. When the fan operates, the fermentation exhaust gas inside the fermenter passes sequentially through the filter assembly and the condenser assembly before entering the loop pipe and being discharged back into the fermenter. This system, through its gas circulation mechanism, allows the fermentation exhaust gas from the fermenter to pass sequentially through the filter assembly and the condenser assembly, before being discharged through the loop pipe and exhaust pipe back into the *Mulberry Branch Fungus* fermentation material inside the fermenter. This enables the carbon dioxide exhaust gas produced during fermentation to return to the fermentation material for utilization by the *Mulberry Branch Fungus*, achieving the reuse of carbon dioxide resources in the exhaust gas and improving resource utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fermentation equipment technology, specifically to a system for recycling the tail gas from mulberry branch fungus fermentation. Background Technology

[0002] The fermentation process of mulberry branch fungi produces exhaust gases containing carbon dioxide and other components. These exhaust gases are not useless. Carbon dioxide is an essential substance for the growth of mulberry branch fungi. Recycling it can create a more suitable growth environment for mulberry branch fungi, reducing gas emissions and improving resource utilization, which is a practice in line with the concept of green development.

[0003] Utility model patent CN210886034U discloses a fermentation tail gas sterilization device. This device includes a fermenter, a tail gas pipe, and a sterilization tank. The sterilization tank includes a tank body, a tank cover, an air inlet, an exhaust outlet, a drain outlet, and a seal. One end of the tail gas pipe is connected to the exhaust outlet of the fermenter, and the other end is connected to the air inlet of the sterilization tank and extends into the sterilization tank. The sterilization tank contains a sterilization liquid. The sterilization tank also includes a dispersion plate, a first sterilization plate, and a second sterilization plate. A conical funnel is located at one end of the tail gas pipe in the sterilization tank. The dispersion plate is located at the bottom of the sterilization tank. The first sterilization plate and the second sterilization plate are alternately arranged above the surface of the sterilization liquid. The exhaust outlet is located on the tank cover, and the drain outlet is located at the bottom of the sterilization tank and is sealed. An observation window is provided on the tank body. This structure is environmentally friendly, does not produce secondary pollutants, has high treatment efficiency, significant removal effect, simple equipment maintenance, high safety, low maintenance, and low cost.

[0004] The current fermentation exhaust gas sterilization device only sterilizes the exhaust gas through a sterilization tank; the treated exhaust gas is not recycled but directly discharged into the environment. Furthermore, the exhaust gas produced during the fermentation of mulberry branch fungi contains a certain amount of carbon dioxide, which has a positive effect on the growth of mulberry branch fungi. However, the device cannot incorporate this carbon dioxide exhaust gas into the fermentation product for reuse, resulting in resource waste. Therefore, we propose a mulberry branch fungi fermentation exhaust gas recycling system. Utility Model Content

[0005] The purpose of this invention is to provide a system for recycling the exhaust gas from mulberry branch fungus fermentation, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A system for recycling fermentation exhaust gas from mulberry branch fungus includes a fermenter for fermenting mulberry branch fungus. The fermenter is equipped with a gas circulation mechanism for recycling the fermentation exhaust gas. The gas circulation mechanism includes a filter assembly located on the outer wall of the fermenter and connected to the top of the fermenter, a condenser assembly connected to the bottom of the filter assembly, and a ring pipe installed inside the fermenter and connected to the output end of the condenser assembly. A fan is provided between the ring pipe and the condenser assembly. The filter assembly contains a plurality of filter elements. The condensation assembly includes a top sleeve and a condensation sleeve connected to the bottom of the top sleeve. A heating coil is installed inside the top sleeve, and a spiral tube is installed inside the condensation sleeve. The exhaust gas passes through the spiral tube. A circulating water tank is connected to the outside of the condensation sleeve, and a water pump is installed on the circulating water tank. The water in the circulating water tank is pumped by the water pump into the condensation sleeve and then flows back into the circulating water tank. A drain pipe is provided at the bottom of the condensation assembly. When the fan is working, the fermentation exhaust gas inside the fermenter passes through the filtration assembly and the condensation assembly in sequence before entering the loop pipe and being discharged into the fermenter.

[0007] Preferably, the filter assembly includes a filter sleeve, with an air inlet pipe connected to the outer surface of the top of the filter sleeve. The input end of the air inlet pipe extends into the fermenter, and the bottom end of the filter sleeve is connected to the top end of the top sleeve through a pipe. After the fermentation exhaust gas enters the top sleeve through the air inlet pipe, it passes through the filter element and is finally discharged from the bottom end of the filter sleeve into the top sleeve.

[0008] This setup allows the fermentation exhaust gas to be filtered and heated sequentially, laying the foundation for subsequent condensation and reuse.

[0009] Preferably, the top end of the filter sleeve is threadedly connected to a top cover, and the bottom end of the top cover is provided with several spacer rings in a coaxial shape, and the multiple filter elements are respectively inserted into the space formed by two adjacent spacer rings.

[0010] This setting facilitates the installation, replacement, and securing of the filter element, ensuring a stable filtration process.

[0011] Preferably, the top of the condenser sleeve is connected to the input end of the water pump via a water pipe, the bottom of the condenser sleeve is connected to the inside of the circulating water tank via a water pipe, and the output end of the water pump is connected to the inside of the circulating water tank via a pipe.

[0012] This setup creates a water circulation loop, allowing condensate to flow continuously within the condenser sleeve, thus condensing the exhaust gas.

[0013] Preferably, the spiral tube is sleeved inside the condenser sleeve, and the top and bottom ends of the spiral tube are respectively sealed and fixed to the top and bottom ends inside the condenser sleeve. The bottom end of the top sleeve is connected to the top end of the spiral tube through a pipe. The bottom end of the spiral tube is connected to a U-shaped bottom tube. The output end of the bottom tube is connected to the input end of the fan. The drain pipe is connected to the bottom side of the bottom tube body, and a drain valve is installed at the output end of the bottom tube.

[0014] This setting extends the residence time of exhaust gas in the condenser sleeve, improves the condensation effect, and facilitates the collection and discharge of condensate.

[0015] Preferably, the ring pipe has an annular tubular structure, and a connecting pipe is connected to the ring pipe, with the input end of the connecting pipe connected to the output end of the fan.

[0016] This setting ensures that the treated exhaust gas is evenly distributed throughout the loop pipe, preparing for the subsequent discharge of fermentation products.

[0017] Preferably, the bottom of the ring pipe is fixed with several vertical exhaust pipes, the bottom end of which extends into the interior of the mulberry branch fungus fermentation product.

[0018] In this setting, the treated exhaust gas can be directly transported into the fermentation product of mulberry branches, realizing the reuse of exhaust gas.

[0019] Preferably, a plurality of fixing seats are fitted on the outer side of the annular tube, and the other end of the fixing seats is fixedly connected to the inner wall of the fermenter.

[0020] In this setup, the mounting bracket can securely fix the ring pipe inside the fermenter, ensuring its stable position during exhaust gas delivery.

[0021] Compared with the prior art, the beneficial effects of this utility model are: This mulberry branch fungus fermentation exhaust gas recycling system, through a gas circulation mechanism, allows the fermentation exhaust gas in the fermenter to be filtered by a filter component and condensed by a condenser component, before being discharged into the mulberry branch fungus fermentation material inside the fermenter through a ring pipe and an exhaust pipe. This allows the carbon dioxide exhaust gas produced during fermentation to return to the fermentation material and be utilized by the mulberry branch fungus, realizing the reuse of carbon dioxide resources in the exhaust gas and improving resource utilization. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the gas circulation mechanism in this utility model; Figure 3 This is an exploded view of the filter assembly in this utility model; Figure 4 This is an exploded view of the condenser assembly in this utility model; Figure 5 This is a schematic diagram of the structure of the central ring pipe in this utility model; The meanings of the labels in the diagram are as follows: 100. Fermentation tank; 110. Feed inlet; 120. Discharge pipe; 130. Support leg; 200. Gas circulation mechanism; 210. Filter assembly; 211. Filter sleeve; 2111. Air inlet pipe; 2112. Connecting rod; 212. Top cover; 2121. Spacer ring; 213. Filter element; 220. Condensation assembly; 221. Top sleeve; 2211. Heating coil; 222. Condensation sleeve; 2221. Spiral tube; 223. Circulating water tank; 2231. Water pump; 224. Bottom pipe; 2241. Drain pipe; 2242. Drain valve; 230. Ring pipe; 231. Connecting pipe; 232. Exhaust pipe; 233. Fixing base; 240. Fan. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 A system for recycling the exhaust gas from mulberry branch fungus fermentation includes a fermentation tank 100 for fermenting mulberry branch fungus. The fermentation tank 100 is made of stainless steel, which has good corrosion resistance and sealing properties, providing a suitable environment for mulberry branch fungus fermentation. The top of the fermentation tank 100 is equipped with a feed inlet 110 for adding the raw materials required for mulberry branch fungus fermentation. The bottom of the fermentation tank 100 is equipped with a discharge pipe 120 for discharging the fermented mulberry branch fungus product. Several support legs 130, made of carbon steel, are fixed to the bottom of the fermentation tank 100 to provide stable support.

[0025] The fermenter 100 is equipped with a gas circulation mechanism 200 for recycling fermentation exhaust gas. This mechanism treats and reuses the exhaust gas, improving resource utilization. The gas circulation mechanism 200 includes a filter assembly 210 located on the outer wall of the fermenter 100 and connected to the top; a condenser assembly 220 connected to the bottom of the filter assembly 210; and a ring pipe 230 installed inside the fermenter 100 and connected to the output end of the condenser assembly 220. A fan 240 is installed between the ring pipe 230 and the condenser assembly 220, providing power for the flow of exhaust gas and promoting its circulation throughout the system. When the fan 240 is working, the fermentation exhaust gas inside the fermenter 100 passes sequentially through the filter assembly 210, the condenser assembly 220 (heating and condensation), and then enters the ring pipe 230 before being discharged back into the fermenter 100.

[0026] like Figures 1-3 As shown, in this utility model, the filter assembly 210 includes a filter sleeve 211 made of stainless steel, which provides installation space for the filter element 213 and protects the internal components. An air inlet pipe 2111, made of seamless steel, is connected to the outer surface of the top of the filter sleeve 211. This air inlet pipe 2111 is used to introduce exhaust gas from the fermenter 100 into the filter assembly 210, with its input end extending into the fermenter 100. A connecting rod 2112, also made of stainless steel, is fixed between the outer circumferential surface of the filter sleeve 211 and the outer wall of the fermenter 100, securely fixing the filter sleeve 211 to the fermenter 100. The filter assembly 210 contains several filter elements 213. A top cover 212 is threadedly connected to the top of the filter sleeve 211. The threaded connection between the top cover 212 and the filter sleeve 211 facilitates disassembly for replacement of the filter elements 213.

[0027] The bottom of the top cover 212 is coaxially equipped with several spacer rings 2121. These spacer rings 2121 are made of plastic and separate the multiple filter elements 213, preventing them from squeezing each other and affecting the filtration effect. Multiple filter elements 213 are inserted into the spaces formed by adjacent spacer rings 2121. The filter elements 213 are activated carbon filter elements, which can effectively adsorb impurities in the exhaust gas. The spacer rings 2121 are fixedly connected to each other by connecting plates. The topmost spacer ring 2121 is fixedly connected to the top cover 212 by several vertical rods. Both the connecting plates and the vertical rods are made of stainless steel, ensuring the stability of the connection between the spacer ring 2121 and the top cover 212.

[0028] like Figure 2 and Figure 3As shown, specifically, the condenser assembly 220 includes a top sleeve 221 and a condenser sleeve 222 connected to the bottom of the top sleeve 221. Both the top sleeve 221 and the condenser sleeve 222 are made of stainless steel, possessing excellent high-temperature resistance and corrosion resistance. The bottom end of the filter sleeve 211 is connected to the top end of the top sleeve 221 via a pipe. The pipe is connected to both the filter sleeve 211 and the top sleeve 221 via flanges to ensure a tight seal. The fermentation exhaust gas enters the filter assembly 210 through the inlet pipe 2111, where it is filtered through the filter element 213. It then exits from the bottom end of the filter sleeve 211 into the top sleeve 221. The top sleeve 221 is used to heat the filtered exhaust gas, while the filter assembly 210 is responsible for removing impurities from the exhaust gas.

[0029] like Figure 4 As shown, a heating coil 2211 is further installed inside the top sleeve 221. The heating coil 2211 is made of copper tubing, which has high heat transfer efficiency. The top and bottom ends of the heating coil 2211 extend to the outside of the top sleeve 221 and are provided with a base. The base is installed on the outer wall of the top sleeve 221. The base and the base are made of stainless steel, which firmly fixes the heating coil 2211 so that it can stably heat the filtered exhaust gas passing through the top sleeve 221.

[0030] The condenser sleeve 222 houses a spiral tube 2221 made of copper, which increases the contact area with condensate, facilitating exhaust gas condensation. The heated exhaust gas passes through the spiral tube 2221. The spiral tube 2221 is fitted inside the condenser sleeve 222, with its top and bottom ends sealed and fixed to the top and bottom ends of the condenser sleeve 222, respectively. The spiral tube 2221 and the condenser sleeve 222 are welded together, ensuring a tight seal and preventing condensate leakage. The bottom end of the top sleeve 221 is connected to the top end of the spiral tube 2221 via a pipe, allowing the heated exhaust gas to smoothly enter the spiral tube 2221 for condensation.

[0031] like Figure 1 , Figure 2 and Figure 4 As shown, a circulating water tank 223, made of plastic, is connected to the condensate sleeve 222. The circulating water tank 223 is used to store condensate. A water pump 2231 is installed on the circulating water tank 223, providing power for the circulation of the condensate. The top of the condensate sleeve 222 is connected to the input end of the water pump 2231 via a water pipe, and the bottom of the condensate sleeve 222 is connected to the interior of the circulating water tank 223 via a water pipe. The output end of the water pump 2231 is connected to the interior of the circulating water tank 223 via a pipe.

[0032] The condenser sleeve 222 has pipe fittings installed at the top and bottom of its outer surface for installing water pipes. The water pipes are made of metal, and the pipe fittings are made of copper. The metal pipes are highly corrosion-resistant, ensuring the stable operation of the water circulation system. Water in the circulating water tank 223 is pumped into the condenser sleeve 222 by the water pump 2231 and then flows back into the circulating water tank 223. The input and output terminals of the water pump 2231 are configured so that the water flow direction in the condenser sleeve 222 is opposite to the exhaust gas flow direction in the spiral tube 2221. The exhaust gas flows inside the spiral tube 2221, and the gap between the spiral tube 2221 and the condenser sleeve 222 serves as a water flow channel. This counter-current design improves the condensation efficiency of the exhaust gas.

[0033] like Figure 2 and Figure 4 As shown, it is worth noting that a drain pipe 2241, made of stainless steel, is located at the bottom of the condenser assembly 220 to drain the accumulated liquid produced by condensation. A U-shaped bottom pipe 224, also made of stainless steel, is connected to the bottom end of the spiral tube 2221. The U-shaped structure ensures that condensate can accurately accumulate in the drain pipe 2241, preventing blockage. The output end of the bottom pipe 224 is connected to the input end of the fan 240. The drain pipe 2241 is connected to the bottom side of the bottom pipe 224, and a drain valve 2242 is installed at the output end of the bottom pipe 224 to control the discharge of accumulated liquid.

[0034] like Figure 2 and Figure 5 As shown, it is worth noting that the ring pipe 230 has a ring-shaped tubular structure and is made of stainless steel, which can evenly distribute the treated exhaust gas to each exhaust pipe 232. A connecting pipe 231, also made of stainless steel, is connected to the ring pipe 230. This connecting pipe 231 is used to introduce the exhaust gas output from the blower 240 into the ring pipe 230, and its input end is connected to the output end of the blower 240. The blower 240 has a base fixed to the outer wall of the fermenter 100. The base is made of carbon steel and securely fixes the blower 240. Several vertical exhaust pipes 232, made of stainless steel, are fixed to the bottom of the ring pipe 230. These exhaust pipes can transport the exhaust gas into the mulberry branch fungus fermentation material, and their bottom ends extend into the interior of the fermentation material. Several fixing seats 233 are fitted on the outer side of the ring tube 230. The fixing seats 233 are made of stainless steel. The other end of the fixing seat 233 is fixedly connected to the inner wall of the fermentation tank 100, so that the ring tube 230 is firmly fixed inside the fermentation tank 100.

[0035] It is worth noting that the heating coil 2211, water pump 2231 and fan 240 involved in this utility model are all existing conventional technologies, and will not be described in detail in this utility model.

[0036] In this embodiment, the mulberry branch fungus fermentation tail gas recycling system operates as follows: First, the gas circulation mechanism 200 is activated periodically. Under the action of the fan 240, the fermentation tail gas in the fermentation tank 100 enters the filter assembly 210 through the air inlet pipe 2111, where it is filtered through the activated carbon filter element 213. Then, the filtered tail gas enters the top sleeve 221 through a pipe. The heating coil 2211 inside the top sleeve 221 heats the filtered tail gas, which then enters the spiral tube 2221. Next, the gas passes through the condenser sleeve 222... Inside, water in the circulating water tank 223 is pumped in by the water pump 2231 and exchanges heat with the exhaust gas in the spiral tube 2221. The exhaust gas is condensed, and the condensed water flows down the spiral tube 2221 to the bottom of the U-shaped bottom tube 224 and enters the drain pipe 2241 for storage. The treated exhaust gas enters the blower 240 through the bottom tube 224, and is then sent by the blower 240 through the connecting pipe 231 into the ring pipe 230. Finally, the exhaust gas in the ring pipe 230 is discharged into the fermentation material of mulberry branch fungus in the fermenter 100 through the exhaust pipe 232, realizing the reuse of exhaust gas. When the gas circulation mechanism 200 stops working, the drain valve 2242 can be opened to drain the accumulated liquid. If the filter element 213 needs to be replaced, the top cover 212 can be unscrewed to bring out the partition ring 2121 for operation.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mulberry branch fungus fermentation tail gas recycling system, comprising a fermentation tank (100) for fermenting mulberry branch fungus, characterized in that: The fermenter (100) is provided with a gas circulation mechanism (200) for recycling the fermentation exhaust gas. The gas circulation mechanism (200) includes a filter assembly (210) located on the outer wall of the fermenter (100) and connected to the top of the fermenter (100), a condenser assembly (220) connected to the bottom of the filter assembly (210), and a ring pipe (230) installed inside the fermenter (100) and connected to the output end of the condenser assembly (220). A fan (240) is provided between the ring pipe (230) and the condenser assembly (220). The filter assembly (210) is provided with a plurality of filter elements (213). The condensing assembly (220) includes a top sleeve (221) and a condensing sleeve (222) connected to the bottom of the top sleeve (221). A heating coil (2211) is installed inside the top sleeve (221), and a spiral tube (2221) is installed inside the condensing sleeve (222). Exhaust gas passes through the spiral tube (2221). A circulating water tank (223) is connected to the outside of the condensing sleeve (222), and a water pump (2231) is installed on the circulating water tank (223). The water in 223) is pumped by the water pump (2231) into the condenser sleeve (222) and then flows back into the circulating water tank (223). The bottom of the condenser assembly (220) is provided with a drain pipe (2241). When the fan (240) is working, the fermentation exhaust gas inside the fermenter (100) passes through the filter assembly (210) and the condenser assembly (220) in sequence before entering the ring pipe (230) and being discharged into the fermenter (100).

2. The mulberry branch fungus fermentation tail gas recycling system according to claim 1, characterized in that: The filter assembly (210) includes a filter sleeve (211). An air inlet pipe (2111) is connected to the outer surface of the top of the filter sleeve (211). The input end of the air inlet pipe (2111) extends into the fermenter (100). The bottom end of the filter sleeve (211) is connected to the top end of the top sleeve (221) through a pipe. After the fermentation exhaust gas enters the top sleeve (221) through the air inlet pipe (2111), it will pass through the filter element (213) and finally be discharged from the bottom end of the filter sleeve (211) into the top sleeve (221).

3. The mulberry branch fungus fermentation tail gas recycling system according to claim 2, characterized in that: The top end of the filter sleeve (211) is threadedly connected to a top cover (212), and the bottom end of the top cover (212) is provided with several spacers (2121) in a coaxial shape. Multiple filter elements (213) are respectively inserted into the space formed by two adjacent spacers (2121).

4. The mulberry branch fungus fermentation tail gas recycling system according to claim 1, characterized in that: The top of the condenser sleeve (222) is connected to the input end of the water pump (2231) via a water pipe, the bottom of the condenser sleeve (222) is connected to the inside of the circulating water tank (223) via a water pipe, and the output end of the water pump (2231) is connected to the inside of the circulating water tank (223) via a pipe.

5. The mulberry branch fungus fermentation tail gas recycling system according to claim 1, characterized in that: The spiral tube (2221) is sleeved inside the condenser sleeve (222). The top and bottom ends of the spiral tube (2221) are sealed and fixed to the top and bottom ends inside the condenser sleeve (222), respectively. The bottom end of the top sleeve (221) is connected to the top end of the spiral tube (2221) through a pipe. The bottom end of the spiral tube (2221) is connected to a U-shaped bottom tube (224). The output end of the bottom tube (224) is connected to the input end of the fan (240). The drain pipe (2241) is connected to the bottom side of the tube body of the bottom tube (224). The output end of the bottom tube (224) is equipped with a drain valve (2242).

6. The mulberry branch fungus fermentation tail gas recycling system according to claim 1, characterized in that: The ring pipe (230) has an annular tubular structure, and a connecting pipe (231) is connected to the ring pipe (230). The input end of the connecting pipe (231) is connected to the output end of the fan (240).

7. The mulberry branch fungus fermentation tail gas recycling system according to claim 1, characterized in that: The bottom of the ring pipe (230) is fixed with several vertical exhaust pipes (232), the bottom end of which extends into the interior of the mulberry branch fungus fermentation product.

8. The mulberry branch fungus fermentation tail gas recycling system according to claim 1, characterized in that: The outer side of the ring pipe (230) is fitted with several fixing seats (233), and the other end of the fixing seat (233) is fixedly connected to the inner wall of the fermentation tank (100).

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