A thermostat sterilization cabinet based on biomass boiler

Abstract

This invention discloses a constant temperature sterilization cabinet based on a biomass boiler, comprising a biomass boiler for generating steam and a constant temperature sterilization cabinet. The biomass boiler is connected to the steam inlet of the constant temperature sterilization cabinet via a steam pipe and a pressure regulating cabinet. The constant temperature sterilization cabinet is provided with a steam return port, which is connected to the biomass boiler via a steam return pipe. The constant temperature sterilization cabinet is provided with multiple rows of mushroom stick placement racks, each rack having multiple layers of shelves. Each shelf has a microwave heater at its bottom, and the bottom of the microwave heater also has a swirl vane. Multiple steam inlets are evenly distributed on the four walls of the constant temperature sterilization cabinet, each with a dispersion mechanism for dispersing steam. An auxiliary temperature control device is also provided at the top of the constant temperature sterilization cabinet, and air intakes are provided on both sides of the bottom of the cabinet, connected to the air inlet. This invention can greatly reduce the time required for sterilizing mushroom sticks and achieves good sterilization effect.

Description

Technical Field

[0001] This invention relates to a constant temperature sterilizer based on a biomass boiler. Background Technology

[0002] Before edible fungi substrate is put into production, it needs to be sterilized at high temperature to eliminate miscellaneous bacteria in the substrate. The packaging bags for the substrate are generally made of PP material, and their heat distortion temperature is generally 121℃. Therefore, steam heating is generally used to sterilize them.

[0003] To maintain the steam temperature at 100-120℃, current technologies generally involve sterilizing the mushroom logs by placing them in a steamer or steam cabinet. This method has the following drawbacks: because the mushroom logs are relatively thick, the internal temperature rises much slower than the external temperature, so the required sterilization time is long, often requiring 72 hours or even more to achieve a satisfactory sterilization effect; regardless of whether it is a steamer or steam cabinet, it is difficult to maintain a constant internal temperature, resulting in an unsatisfactory sterilization effect. In particular, with steamer placement, the mushroom logs are placed in stacked steamer trays, where the temperature at the bottom is often higher and decreases as you go up. To achieve a more ideal sterilization effect, the order of the steamer trays needs to be changed periodically, which is very labor-intensive for the staff. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a constant temperature sterilization cabinet based on a biomass boiler with higher sterilization efficiency and better sterilization effect.

[0005] The technical solution of the present invention is: a constant temperature sterilization cabinet based on a biomass boiler, comprising a biomass boiler for generating steam and a constant temperature sterilization cabinet;

[0006] The biomass boiler is connected to the steam inlet of the constant temperature sterilizer via a steam pipe and a pressure regulating cabinet. The pressure regulating cabinet contains a built-in pump. The constant temperature sterilizer has a steam return port, which is connected to the biomass boiler via a steam return pipe. The constant temperature sterilizer maintains a constant pressure. When the temperature inside the constant temperature sterilizer is lower than the preset temperature, steam circulates rapidly between the biomass boiler and the constant temperature sterilizer. When the temperature inside the constant temperature sterilizer reaches the preset temperature, steam circulates slowly between the biomass boiler and the constant temperature sterilizer. When the steam flow rate changes, the furnace of the biomass boiler adjusts the heat accordingly to regulate the steam generation rate.

[0007] The constant temperature sterilizer is equipped with multiple rows of mushroom stick placement racks. Each mushroom stick placement rack has multiple shelves. Each shelf has a microwave heater at the bottom for initial auxiliary heating after the mushroom sticks are placed in. The microwave heaters stop working after the preset temperature is reached in the constant temperature sterilizer and do not participate in heating and sterilizing the mushroom sticks in the middle and later stages.

[0008] The bottom of the microwave heater is also equipped with a rotating blade, which continues to rotate after the microwave heater stops working to make the steam distribution more uniform.

[0009] The constant temperature sterilizer has multiple steam inlets evenly distributed on its four walls. Each steam inlet is connected to the steam outlet through multiple branch pipes, and each steam outlet is equipped with a dispersion mechanism for dispersing steam.

[0010] The top of the constant temperature sterilizer is also equipped with an auxiliary temperature control device for fine-tuning the temperature. The auxiliary temperature control device includes a shell and a heating device disposed inside the shell. The outer periphery of the shell is provided with multiple air outlets, the top of the shell is provided with an air inlet, and the heating device is disposed in the middle of the shell.

[0011] The constant temperature sterilizer is also equipped with air intakes on both sides of the bottom. The air intakes are connected to the air inlet of the auxiliary temperature control device through connecting pipes and fans. When the auxiliary temperature control device is not working, the fan continues to work to make the temperature inside the constant temperature sterilizer more uniform.

[0012] Specifically, there are multiple constant temperature sterilizers, with one biomass boiler connected to multiple constant temperature sterilizers.

[0013] Specifically, the mushroom stick placement rack is a high-temperature resistant engineering plastic rack, and the heating device consists of multiple electric heating rods.

[0014] Preferably, the constant temperature sterilizer is equipped with three rows of mushroom stick placement racks.

[0015] Furthermore, the biomass boiler includes a fuel storage hopper, a screw feeder, a furnace, and a boiler body located above the furnace. The furnace is also equipped with an electric damper, and the firepower of the furnace can be adjusted by regulating the feeding speed of the screw feeder and the electric damper on the furnace.

[0016] Furthermore, it also includes electric valves installed on the steam supply pipe, return pipe, and various connecting pipes, thermometers installed in the constant temperature sterilizer, and a controller. The screw feeder, pressure regulating cabinet, drive mechanism of electric damper, electric valves, and thermometer of the biomass boiler are all connected to the controller.

[0017] Furthermore, the constant temperature sterilizer is also equipped with two sealed doors on the front, with the two sealed doors corresponding to the gaps between the three rows of mushroom sticks.

[0018] Furthermore, the auxiliary temperature control device has two air inlets at the top, and the two air inlets are respectively connected to the air intakes on both sides.

[0019] Furthermore, the dispersing mechanism includes a cover with an arc-shaped recess on the inner side of the cover, and the cover is fixed to the steam outlet by multiple legs.

[0020] Furthermore, the steam outlet also has a one-way mechanism, which includes a sphere. The steam outlet has a corresponding limiting seat for the sphere. The front end of the steam outlet has an upwardly bent channel. The arc-shaped recess inside the cover corresponds to the sphere. The inner side of the cover and the end of the channel maintain a distance.

[0021] The beneficial effects of this invention are: this invention can greatly reduce the time required for sterilizing mushroom sticks, and can achieve the effect of eliminating miscellaneous bacteria in mushroom sticks in 24 hours or even less.

[0022] Steam can be generated using biomass boilers. Biomass fuel is low in cost, and its use can also accelerate the use and promotion of organic waste such as straw, which is beneficial to environmental protection.

[0023] In the initial stage of mushroom stick sterilization, rapid steam circulation and microwave heating are used to rapidly raise the temperature of the mushroom stick inside and out at the same time, so that the mushroom stick can quickly reach a high temperature inside and out, which helps to improve the sterilization efficiency of the mushroom stick and reduce the sterilization time.

[0024] In the middle and later stages of mushroom stick sterilization, steam circulates slowly, and the internal temperature of the constant temperature sterilizer is finely adjusted with the auxiliary temperature control device. This helps to reduce the fuel consumption of the biomass boiler and accurately control the temperature, so that the mushroom sticks are sterilized in a constant temperature and pressure environment. This will not damage the PP packaging bag of the mushroom sticks. Moreover, this relatively extreme temperature can improve the sterilization efficiency of the mushroom sticks and reduce the sterilization time.

[0025] During the sterilization process of the mushroom sticks, steam circulates continuously between the constant temperature sterilizer and the biomass boiler. Combined with the rotation of the blades of each microwave heater and the continuous intake and exhaust of the auxiliary temperature control device, the steam in the entire cabinet is always in motion, which makes the temperature in the constant temperature sterilizer uniform and helps to improve the sterilization effect of the mushroom sticks.

[0026] In addition, one biomass boiler can be connected to multiple constant temperature sterilization cabinets, which is very suitable for mushroom stick manufacturers or large-scale edible mushroom farmers, and can reduce the purchase cost of equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a cross-sectional view of the constant temperature sterilizer in this invention;

[0029] Figure 3 This is a schematic diagram of the structure of the microwave heater in this invention;

[0030] Figure 4 This is a schematic diagram of the auxiliary temperature control device in this invention;

[0031] Figure 5This is a schematic diagram of the front structure of the constant temperature sterilizer in this invention;

[0032] Figure 6 This is a schematic diagram of the dispersing mechanism in this invention;

[0033] Figure 7 This is a schematic diagram of the one-way mechanism on the steam outlet of the present invention.

[0034] In the diagram: 1. Biomass boiler; 2. Constant temperature sterilizer; 3. Steam pipe; 4. Pressure regulating cabinet; 5. Steam inlet; 6. Steam return outlet; 7. Steam return pipe; 8. Mushroom stick placement rack; 9. Shelf; 10. Microwave heater; 11. Rotary blade; 12. Steam outlet; 13. Auxiliary temperature control device; 14. Shell; 15. Heating device; 16. Air outlet; 17. Air inlet; 18. Air intake; 19. Sealing door; 20. LCD control panel; 21. Cover; 22. Support leg; 23. Ball; 24. Limiting seat; 25. Channel; 26. Condenser assembly. Detailed Implementation

[0035] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0036] like Figure 1 As shown, a constant temperature sterilizer based on a biomass boiler includes a biomass boiler 1 for generating steam and a constant temperature sterilizer 2.

[0037] The biomass boiler 1 is connected to the steam inlet 5 of the constant temperature sterilizer 2 via a steam pipe 3 and a pressure regulating cabinet 4. The pressure regulating cabinet 4 contains a pump. The constant temperature sterilizer 2 is equipped with a steam return port 6, which is connected to the biomass boiler 1 via a steam return pipe 7. The constant temperature sterilizer 2 maintains a constant pressure. When the temperature inside the constant temperature sterilizer 2 is lower than the preset temperature, the steam return port 6 quickly discharges the lower-temperature steam from the constant temperature sterilizer 2, and the steam inlet 5 quickly inputs higher-temperature steam, causing the steam to circulate rapidly between the biomass boiler 1 and the constant temperature sterilizer 2 to maintain a constant temperature and pressure inside the constant temperature sterilizer 2. When the temperature inside the constant temperature sterilizer 2 reaches the preset temperature, the steam circulates at a low speed between the biomass boiler 1 and the constant temperature sterilizer 2 to achieve the purpose of heat preservation. When the steam flow rate changes, the furnace of the biomass boiler 1 adjusts the firepower accordingly to adjust the steam generation rate.

[0038] like Figure 2 As shown, the constant temperature sterilizer 2 is provided with multiple rows of mushroom stick placement racks 8, and each mushroom stick placement rack 8 is provided with multiple layers of shelves 9. Each shelf 9 is provided with a microwave heater 10 at the bottom for initial auxiliary heating after the mushroom sticks are placed.

[0039] The microwave heater 10 is only used for auxiliary heating in the initial stage after the mushroom sticks are placed in the sterilizer 2. Since the mushroom sticks are relatively thick, it still takes a long time for them to heat up inside under the action of steam after being placed in the sterilizer 2. The microwave heater 10 is used to quickly increase the internal temperature of the mushroom sticks in the initial stage, and work with the steam to quickly reach the temperature required for sterilization inside and outside the mushroom sticks. The microwave heater 10 stops after reaching the preset temperature. It does not participate in the heating and sterilization of the mushroom sticks in the middle and later stages.

[0040] like Figure 3 As shown, the bottom of the microwave heater 10 is also provided with a swivel blade 11. When the microwave heater 10 is working, the swivel blade 11 makes the microwave distribution more uniform. After the microwave heater 10 stops working, the swivel blade 11 continues to rotate to make the steam distribution more uniform.

[0041] like Figure 2 As shown, multiple steam inlets 12 are evenly distributed on the four walls of the constant temperature sterilizer 2. The steam inlet 5 is connected to each steam inlet 12 through multiple branch pipes. Each steam inlet 12 is provided with a dispersion mechanism for dispersing steam to avoid the steam directly hitting the packaging bag of the mushroom stick and causing it to become deformed due to excessive local temperature.

[0042] Combination Figure 2 and Figure 4 As shown, the top of the constant temperature sterilizer 2 is also provided with an auxiliary temperature control device 13. The auxiliary temperature control device 13 includes a shell 14 and a heating device 15 disposed in the shell 14. The outer periphery of the shell 14 is provided with a plurality of air outlets 16, the top of the shell 14 is provided with an air inlet 17, and the heating device 15 is disposed in the middle of the shell 14.

[0043] The auxiliary temperature control device 13 is used for fine-tuning the temperature inside the constant temperature sterilizer 2 and the inside and outside temperature of the mushroom sticks after they reach the preset temperature. When the temperature inside the constant temperature sterilizer 2 drops slightly (within 3°C), the auxiliary temperature control device 13 draws in steam from the constant temperature sterilizer 2. The steam exchanges heat quickly with the heating device 15 through the shell 14 and is then discharged back into the constant temperature sterilizer 2 through the air outlet 16 on the outer periphery of the shell 14. This makes the constant temperature in the constant temperature sterilizer 2 more flexible and does not have to rely entirely on the input and output of steam. The auxiliary temperature control device 13 makes the constant temperature sterilizer 2 more sensitive and accurate in temperature adjustment and easier to maintain a constant temperature. The air outlet 16 on the outer periphery of the shell 14 disperses the reheated steam into the constant temperature sterilizer 2, avoiding uneven distribution or direct impact on the packaging bag of the mushroom sticks, which would cause local overheating and deformation.

[0044] like Figure 2As shown, the constant temperature sterilizer 2 is provided with air intake ports 18 on both sides of the bottom. The air intake ports 18 are connected to the air inlet 17 of the auxiliary temperature control device 13 through connecting pipes and fans. When the heating device 15 of the auxiliary temperature control device 13 is working, the air intake ports 18 draw in the steam with a lower temperature at the bottom of the constant temperature sterilizer 2 and reheat it by the auxiliary temperature control device 13. When the heating device 15 of the auxiliary temperature control device 13 is not working, the air intake ports 18 draw in the steam at the bottom of the constant temperature sterilizer 2 and circulate the steam in the constant temperature sterilizer 2 to help maintain the temperature consistency in the constant temperature sterilizer 2.

[0045] The working principle of the above structure is as follows: the staff places the mushroom sticks with PP material packaging bags on the shelves 9 of each mushroom stick placement rack 8 in sequence, and then closes the constant temperature sterilizer 2;

[0046] At this time, each microwave heater 10 is started to preheat the inside of the mushroom stick. The biomass boiler 1 inputs steam at a temperature of 120°C into the constant temperature sterilizer 2 through the pressure regulating cabinet 4, steam pipe 3, and steam inlet 5. The return steam port 6 is opened to return the steam with a lower temperature after heat exchange to the biomass boiler 1, so that the temperature inside the constant temperature sterilizer 2 rises rapidly. During this process, the pressure regulating cabinet 4 keeps the pressure inside the constant temperature sterilizer 2 and the biomass boiler 1 at about 0.1MPa. The furnace firepower of the biomass boiler 1 is adjusted to the maximum to accelerate the steam generation rate.

[0047] When the temperature inside the constant temperature sterilizer 2 reaches 100-120℃, the inside of the mushroom sticks has been preheated to a higher temperature. At this time, each microwave heater 10 stops working, and the steam input from the steam inlet 5 and the steam output from the steam outlet slow down. That is, the circulation speed of steam between the biomass boiler 1 and the constant temperature sterilizer 2 slows down, so that the temperature inside the constant temperature sterilizer 2 is kept constant between 110-120℃. The furnace firepower of the biomass boiler 1 is reduced, and the pressure regulating cabinet 4 always keeps the pressure inside the constant temperature sterilizer 2 and the biomass boiler 1 at about 0.1MPa.

[0048] As the mushroom spawn undergoes prolonged sterilization, the internal and external temperatures of the spawn and the temperature inside the constant temperature sterilizer 2 tend to stabilize at 120℃. When the temperature inside the constant temperature sterilizer 2 drops slightly, it becomes difficult to precisely control the temperature by adjusting the steam circulation speed. The auxiliary temperature control device 13 is activated to quickly heat the inhaled steam and discharge it, providing slight auxiliary temperature adjustment inside the constant temperature sterilizer 2. This allows the mushroom spawn to be sterilized under constant temperature and pressure conditions without damaging the PP packaging bags. This process greatly reduces the sterilization time of the mushroom spawn, enabling it to achieve the effect of eliminating miscellaneous bacteria within 24 hours or even less.

[0049] The beneficial effects of the above structure are: short sterilization time, achieving the effect of eliminating miscellaneous bacteria in the sterilization stick in 24 hours or even less;

[0050] Steam is generated using a biomass boiler 1. Biomass fuel is low in cost, and its use can also accelerate the use and promotion of organic waste such as straw, which is beneficial to environmental protection.

[0051] In the initial stage of mushroom stick sterilization, rapid steam circulation and microwave heating are used to rapidly raise the temperature of the mushroom stick inside and out at the same time, so that the mushroom stick can quickly reach a high temperature inside and out, which helps to improve the sterilization efficiency of the mushroom stick and reduce the sterilization time.

[0052] In the middle and late stages of mushroom stick sterilization, steam circulates slowly, and the auxiliary temperature control device 13 finely adjusts the internal temperature of the constant temperature sterilizer 2, which helps to reduce the fuel consumption of the biomass boiler 1 and accurately control the temperature, so that the mushroom sticks are sterilized in a constant temperature and pressure environment. Since the temperature is always kept at around 120℃, it will not damage the PP material packaging bag of the mushroom sticks. Moreover, this relatively extreme temperature can improve the sterilization efficiency of the mushroom sticks and reduce the sterilization time required.

[0053] During the sterilization process of the mushroom sticks, steam continuously circulates between the constant temperature sterilizer 2 and the biomass boiler 1. In conjunction with the rotation of the blades 11 of each microwave heater 10 and the continuous intake and exhaust of the auxiliary temperature control device 13, the steam in the entire cabinet is always in motion, which makes the temperature in the constant temperature sterilizer 2 uniform and helps to improve the sterilization effect of the mushroom sticks.

[0054] In addition, one biomass boiler 1 can be connected to multiple constant temperature sterilizers 2, which is very suitable for mushroom stick manufacturers or large-scale edible mushroom farmers, and can reduce the purchase cost of equipment.

[0055] Specifically, the mushroom stick placement rack 8 is a high-temperature resistant engineering plastic rack to meet the requirements when microwave heating the mushroom sticks.

[0056] Specifically, such as Figure 1 As shown, there are multiple constant temperature sterilizers 2, and one biomass boiler 1 is connected to multiple constant temperature sterilizers 2.

[0057] Specifically, the heating device 15 consists of multiple heating rods.

[0058] Preferred, such as Figure 2 As shown, the constant temperature sterilizer 2 is equipped with three rows of mushroom stick placement racks 8.

[0059] In another embodiment, the biomass boiler 1 includes a fuel storage hopper, a screw feeder, a furnace, and a boiler body disposed above the furnace. The furnace is also equipped with an electric damper, and the firepower of the furnace can be adjusted by adjusting the feeding speed of the screw feeder and the damper on the furnace.

[0060] In another embodiment, it also includes electric valves installed on the steam supply pipe 3, the return steam pipe 7 and each connecting pipe, a thermometer installed in the constant temperature sterilizer 2 and a controller. The screw feeder, pressure regulating cabinet 4, drive mechanism of electric damper, each electric valve and thermometer of the biomass boiler 1 are all connected to the controller.

[0061] In another embodiment, such as Figure 2 As shown, the constant temperature sterilizer 2 consists of an outer shell, an inner shell, and an insulation layer and frame disposed between the inner shell and the outer shell to ensure the reliability and heat preservation of the constant temperature sterilizer 2.

[0062] In another embodiment, such as Figure 5 As shown, the constant temperature sterilizer 2 is also provided with two sealed doors 19 on the front. The two sealed doors 19 are set with gaps between the three rows of mushroom sticks placement racks 8 to facilitate the operation of operators to take and put the mushroom sticks. One of the two sealed doors 19 is also provided with an LCD control screen 20.

[0063] In another embodiment, such as Figure 4 As shown, the auxiliary temperature control device 13 has two air inlets 17 on the top, and the two air inlets 17 are respectively connected to the air intakes 18 on both sides.

[0064] In another embodiment, such as Figure 6 As shown, the dispersing mechanism includes a cover 21 with an arc-shaped recess on the inner side. The cover 21 is fixed to the steam inlet 12 by multiple legs 22. When steam is input, it impacts the inner side of the cover 21 and disperses to the surrounding area.

[0065] In another embodiment, such as Figure 7 As shown, the steam outlet 12 also has a one-way mechanism, which includes a sphere 23. The steam outlet 12 has a corresponding limiting seat 24 for the sphere 23. The front end of the steam outlet 12 has an upwardly bent channel 25. The arc-shaped recess on the inner side of the cover 21 corresponds to the sphere 23. The inner side of the cover 21 and the end of the channel 25 maintain a distance. When steam is input, the sphere 23 moves upward along the channel 25 under the push of steam and abuts against the sphere 23. At this time, a gap is generated between the sphere 23 and the channel 25. Steam is ejected from the gap and dispersed in all directions. However, when the steam stops input, the sphere 23 falls back and abuts against the limiting seat 24, sealing the steam outlet.

[0066] In another embodiment, such as Figure 1 As shown, a condenser group 26 is also connected to the middle of the return steam pipe 7 to recover and utilize the waste heat in the steam before it returns to the biomass boiler 1.

Claims

1. A constant temperature sterilizer based on a biomass boiler, characterized in that, Includes a biomass boiler (1) for generating steam and a constant temperature sterilizer (2); The biomass boiler (1) is connected to the steam inlet (5) of the constant temperature sterilizer (2) through a steam pipe (3) and a pressure regulating cabinet (4). The pressure regulating cabinet (4) has a built-in pump body. The constant temperature sterilizer (2) is provided with a steam return port (6). The steam return port (6) is connected to the biomass boiler (1) through a steam return pipe (7). The constant temperature sterilizer (2) maintains constant pressure. When the temperature inside the constant temperature sterilizer (2) is lower than the preset temperature, the steam circulates rapidly between the biomass boiler (1) and the constant temperature sterilizer (2). When the temperature inside the constant temperature sterilizer (2) reaches the preset temperature, the steam circulates slowly between the biomass boiler (1) and the constant temperature sterilizer (2). When the steam flow rate changes, the furnace of the biomass boiler (1) adjusts the firepower accordingly to adjust the steam generation rate. The constant temperature sterilizer (2) is equipped with multiple rows of mushroom stick placement racks (8), and each mushroom stick placement rack (8) is equipped with multiple shelves (9). Each shelf (9) is equipped with a microwave heater (10) at the bottom for initial auxiliary heating after the mushroom sticks are placed in. The microwave heater (10) is used to quickly increase the internal temperature of the mushroom sticks in the initial stage, and, together with steam, to quickly reach the temperature required for sterilization inside and outside the mushroom sticks. After the preset temperature is reached in the constant temperature sterilizer (2), the microwave heater (10) stops working and does not participate in the heating and sterilization of the mushroom sticks in the middle and later stages. The bottom of the microwave heater (10) is also provided with a swivel blade (11), which continues to rotate after the microwave heater (10) stops working, so that the steam is distributed more evenly. The constant temperature sterilizer (2) is also provided with multiple steam outlets (12) evenly distributed on its four walls. The steam inlet (5) is connected to each steam outlet (12) through multiple branch pipes. Each steam outlet (12) is provided with a dispersion mechanism for dispersing steam. The top of the constant temperature sterilizer (2) is also provided with an auxiliary temperature control device (13) for fine temperature adjustment. The auxiliary temperature control device (13) includes a shell (14) and a heating device (15) disposed in the shell (14). The outer periphery of the shell (14) is provided with multiple air outlets (16), the top of the shell (14) is provided with an air inlet (17), and the heating device (15) is disposed in the middle of the shell (14). The constant temperature sterilizer (2) is also provided with air intakes (18) on both sides of the bottom. The air intakes (18) are connected to the air inlet (17) of the auxiliary temperature control device (13) through connecting pipes and fans. When the auxiliary temperature control device (13) is not working, the fan is still working so that the temperature inside the constant temperature sterilizer (2) is more uniform. The dispersing mechanism includes a cover (21), the inner side of which has an arc-shaped recess, and the cover (21) is fixed to the steam outlet (12) by multiple legs (22); The steam outlet (12) also has a one-way mechanism, which includes a sphere (23). The steam outlet (12) has a limiting seat (24) corresponding to the sphere (23). The front end of the steam outlet (12) has an upwardly bent channel (25). The arc-shaped recess on the inner side of the cover (21) corresponds to the sphere (23). The inner side of the cover (21) and the end of the channel (25) maintain a distance.

2. The constant temperature sterilizer based on a biomass boiler as described in claim 1, characterized in that, There are multiple constant temperature sterilizers (2), and one biomass boiler (1) is connected to multiple constant temperature sterilizers (2).

3. A constant temperature sterilizer based on a biomass boiler as described in claim 2, characterized in that, The mushroom stick placement rack (8) is a high-temperature resistant engineering plastic rack, and the heating device (15) consists of multiple electric heating rods.

4. A constant temperature sterilizer based on a biomass boiler as described in claim 3, characterized in that, The constant temperature sterilizer (2) is equipped with three rows of mushroom stick placement racks (8).

5. A constant temperature sterilizer based on a biomass boiler as described in claim 4, characterized in that, The biomass boiler (1) includes a fuel storage hopper, a screw feeder, a furnace, and a boiler body located above the furnace. The furnace is also equipped with an electric damper.

6. A constant temperature sterilizer based on a biomass boiler as described in claim 5, characterized in that, It also includes electric valves installed on the steam supply pipe (3), return pipe (7) and each connecting pipe, thermometers installed in the constant temperature sterilizer (2) and a controller. The screw feeder, pressure regulating cabinet (4), drive mechanism of electric damper, electric valves and thermometer of the biomass boiler (1) are all connected to the controller.

7. A constant temperature sterilizer based on a biomass boiler as described in claim 6, characterized in that, The constant temperature sterilizer (2) is also provided with two sealed doors (19) on the front, and the two sealed doors (19) are set in the gap between the three rows of mushroom sticks placement racks (8).

8. A constant temperature sterilizer based on a biomass boiler as described in claim 7, characterized in that, The auxiliary temperature control device (13) has two air inlets (17) at the top, and the two air inlets (17) are respectively connected to the air intakes (18) on both sides.

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