Biomass pyrolysis gas low-nitrogen combustion machine

Abstract

This application relates to a low-NOx burner for biomass pyrolysis fuel, belonging to the technical field of biomass combustion equipment. It includes a gasification chamber and a combustion chamber, which are connected. Multiple cooling boxes are fixedly arranged on the outer wall of the gasification chamber along the combustion direction of the biomass particles. One side of each cooling box is attached to the outer wall of the gasification chamber, and one end of each cooling box is connected to a water inlet pipe. Multiple water inlet pipes are connected to a water pump, which is connected to a water tank containing cooling water. The water tank is also connected to the ends of the cooling boxes furthest from the water inlet pipes. Multiple sets of temperature sensing components, each corresponding to a cooling box, are fixedly connected to the side wall of the gasification chamber. A water inlet flow control component connected to the temperature sensing components is provided on the water inlet pipe. The temperature sensing components are used to sense the temperature at the positions directly opposite the gasification chamber and the cooling boxes, and to drive the water inlet flow control component to regulate the flow rate of the water inlet pipe. This application allows for precise cooling of the gasification chamber.

Description

Technical Field

[0001] This application relates to the technical field of biomass combustion equipment, and in particular to a low-NOx burner for biomass pyrolysis fuel. Background Technology

[0002] A biomass burner is a semi-gasification combustion device for biomass, and it is a high-temperature pyrolysis burner for biomass that uses organic biomass such as biomass pellets as fuel. Biomass burners have the advantages of low combustion cost and low pollution.

[0003] A biomass burner mainly consists of a gasification chamber and a combustion chamber, which are connected. Biomass pellets undergo high-temperature combustion and pyrolysis in the gasification chamber, and the resulting combustible gas is burned in the combustion chamber to produce a flame. To reduce the nitrogen oxide production of biomass pellets in the gasification chamber, a water-cooling device is typically installed. This device controls the combustion temperature within the gasification chamber, enabling the biomass pellets to burn at a low temperature, thus achieving low-NOx combustion within the gasification chamber.

[0004] Conventional water-cooling devices allow cooling water to flow through the entire side wall of the vaporization chamber, cooling the entire chamber. This makes it difficult to match the cooling effect of the vaporization chamber with the combustion temperature of different parts of the chamber, thus making it difficult to refine the cooling effect. Summary of the Invention

[0005] In order to refine the cooling effect of the water-cooling device on the gasification box, this application provides a low-NOx burner for biomass pyrolysis fuel.

[0006] This application provides a low-NOx burner for biomass pyrolysis fuel, which adopts the following technical solution:

[0007] A low-NOx biomass pyrolysis fuel burner includes a gasification chamber and a combustion chamber. The gasification chamber is connected to the combustion chamber. Multiple cooling boxes are fixedly arranged on the outer wall of the gasification chamber along the combustion direction of the biomass particles. One side of each cooling box is attached to the outer wall of the gasification chamber. One end of each cooling box is connected to a water inlet pipe. Multiple water inlet pipes are connected to a water pump. The water pump is connected to a water tank containing cooling water and is connected to the ends of the multiple cooling boxes away from the water inlet pipes. Multiple sets of temperature sensing components, each corresponding to a cooling box, are fixedly connected to the side wall of the gasification chamber. A water inlet flow control component connected to the temperature sensing components is provided on the water inlet pipe. The temperature sensing components are used to sense the temperature of the gasification chamber and the cooling boxes facing each other, and to drive the water inlet flow control component to regulate the flow rate of the water inlet pipe.

[0008] By adopting the above technical solution, biomass pellets are burned and pyrolyzed in the gasification chamber. A water pump draws cooling water from the water tank into multiple inlet pipes. The cooling water flows through the inlet pipes into its corresponding cooling box. As the cooling water flows through the cooling box, it absorbs heat from the gasification chamber and then flows back into the water tank. Multiple cooling boxes cool different combustion locations in the gasification chamber, making it easy to cool the gasification chamber in sections. A temperature sensing component senses the temperature of the gasification chamber and the cooling box directly opposite each other. The temperature sensing component drives the water inlet flow control component to regulate the flow rate of the inlet pipe, so that the flow rate of cooling water in the cooling box can be regulated based on the temperature of the gasification chamber. This makes it easy for the cooling effect of each cooling box to match the actual temperature of the gasification chamber. Thus, through the cooperation of multiple cooling boxes, temperature sensing component, and water inlet flow control component, the cooling effect of the gasification chamber is refined.

[0009] Optionally, the temperature sensing component includes a temperature sensing box and a temperature sensing plate. The temperature sensing box is fixedly connected to the vaporization box, and one end of the temperature sensing box near the vaporization box is connected to the vaporization box. The temperature sensing plate is fixedly disposed at the connection between the temperature sensing box and the vaporization box. The temperature sensing plate is used to transfer heat from the vaporization box to the temperature sensing box. The temperature sensing box contains air, and the expansion of the air drives the water inlet flow control component to regulate the flow rate of the water inlet pipe.

[0010] By adopting the above technical solution, the temperature inside the vaporization box is transferred to the temperature sensing box through the temperature sensing plate. The air inside the temperature sensing box expands when heated, and the degree of expansion corresponds to the temperature of the vaporization box. The expanded air is used as the driving force to drive the water inlet flow control component to regulate the flow rate of the water inlet pipe. This allows the driving force of the water inlet flow control component to utilize the heat of the vaporization box, and also allows the water inlet flow control component to adjust the flow rate of the water inlet pipe to match the temperature of the vaporization box, making it easier to refine the cooling effect of the cooling water.

[0011] Optionally, the temperature sensing plate is made of graphite material.

[0012] By adopting the above technical solution, since graphite material has excellent thermal conductivity while having high temperature resistance, the temperature sensing plate is not easily damaged while transferring heat.

[0013] Optionally, the water inlet flow control assembly includes a water inlet flow control pipe, a water inlet telescopic rod, and a water inlet flow control plate. The two ends of the water inlet flow control pipe are respectively connected to the temperature sensing box and the end of the water inlet telescopic rod away from the movable end. The water inlet telescopic rod is fixedly connected to the water inlet pipe, and its movable end is fixedly connected to one end of the water inlet flow control plate. The other end of the water inlet flow control plate is slidably inserted into the interior of the water inlet pipe. A first return spring is fixedly connected between the water inlet telescopic rod and its movable end. The first return spring is used to drive the movable end of the water inlet telescopic rod to retract, and its stiffness matches the combustion temperature range of the vaporization box section corresponding to the cooling box.

[0014] By adopting the above technical solution, the expanded air enters the water inlet telescopic rod from the water inlet control pipe. The movable end of the water inlet telescopic rod extends under the pressure of the expanded air, and the first return spring accumulates elastic force. The movable end of the water inlet telescopic rod drives the water inlet control plate to slide. The water inlet control plate gradually slides out of the water inlet pipe, increasing the flow rate of the water inlet pipe. Since the stiffness of the first return spring matches the combustion temperature range of the vaporization box, the sliding range of the water inlet control plate can be matched with the combustion temperature range of the vaporization box through the first return spring. This makes it easier to refine the cooling effect of the cooling box on the vaporization box. At the same time, the elastic force of the first return spring can make the water inlet telescopic rod automatically retract.

[0015] Optionally, the end of the cooling box away from the water inlet pipe is connected to a water outlet pipe, and multiple water outlet pipes are connected to the water tank. A water outlet flow control assembly is provided on the water outlet pipe. The water outlet flow control assembly includes a water outlet flow control pipe, a water outlet telescopic rod, and a water outlet flow control plate. The two ends of the water outlet flow control pipe are respectively connected to the temperature sensing box and the end of the water outlet telescopic rod away from the movable end. The water outlet telescopic rod is fixedly connected to the water outlet pipe, and its movable end is fixedly connected to one end of the water outlet flow control plate. The other end of the water outlet flow control plate slides through the interior of the water outlet pipe. A second return spring is fixedly connected between the water outlet telescopic rod and its movable end. The second return spring is used to drive the movable end of the water outlet telescopic rod to retract, and its stiffness matches the combustion temperature range of the vaporization box section corresponding to the cooling box.

[0016] By adopting the above technical solution, the expanded air enters the water outlet telescopic rod from the water outlet control pipe. The movable end of the water outlet telescopic rod extends under the pressure of the air, and the second return spring accumulates elastic force. The movable end of the water outlet telescopic rod drives the water outlet control plate to slide, and the water outlet control plate gradually slides out of the water outlet pipe, increasing the flow rate of the water outlet pipe. Since the stiffness of the second return spring matches the combustion temperature range of the vaporization box, the sliding range of the water outlet control plate can be matched with the combustion temperature range of the vaporization box through the second return spring. Under the adjustment of the water inlet pipe flow rate, the water outlet pipe flow rate can also be adjusted according to the combustion temperature range of the vaporization box, thereby making it easier to further refine the cooling effect of the cooling box on the vaporization box. At the same time, the elastic force of the second return spring can make the water outlet telescopic rod automatically retract.

[0017] Optionally, the cooling box is provided with a water flow control assembly, which includes a water flow control pipe, a water flow telescopic rod, a transmission part, and a flow control part. The two ends of the water flow control pipe are respectively connected to the temperature sensing box and the end of the water flow telescopic rod away from the movable end. The water flow telescopic rod is fixedly installed in the cooling box, and its movable end is connected to the transmission part. The transmission part is connected to the flow control part. The flow control part is located inside the cooling box and is used to regulate the flow rate of cooling water in the cooling box. A third return spring is fixedly connected between the water flow telescopic rod and its movable end. The third return spring is used to drive the movable end of the water flow telescopic rod to retract, and its stiffness matches the combustion temperature range of the vaporization box section corresponding to the cooling box.

[0018] By adopting the above technical solution, the expanding air flows from the water flow control pipe into the water flow telescopic rod. The expanding air pushes the movable end of the water flow telescopic rod to extend, and causes the third return spring to accumulate elastic force. The movable end of the water flow telescopic rod drives the transmission part to control the flow control part to regulate the flow rate of the cooling water in the cooling box. Since the stiffness of the third return spring matches the combustion temperature range of the vaporization box corresponding to the cooling box, the flow rate of the cooling water in the cooling box can also be easily regulated according to the combustion temperature range of the vaporization box. At the same time, the elastic force of the third return spring makes it easy for the water flow telescopic rod to retract automatically.

[0019] Optionally, the vaporization box is polygonal, the temperature sensing box is located on one side of the vaporization box, the transmission part includes a rack, gears and a transmission shaft, multiple racks are provided, and each rack corresponds to one of the other side walls of the vaporization box. The racks are slidably connected to the cooling box, the racks near the water inlet pipe are fixedly connected to the movable end of the water flow telescopic rod, and between two adjacent racks, the rack near the water flow telescopic rod is used to drive the rack away from the water flow telescopic rod to slide. Multiple sets of gears and transmission shafts are provided, and each set corresponds to one of the racks. Each set of gears and transmission shafts has multiple gears and transmission shafts. The gears mesh with the racks and are rotatably connected to the cooling box. The transmission shafts correspond to one of the gears and are coaxially fixedly connected to the gears. The transmission shafts rotatably pass through the side wall of the cooling box, and one end located inside the cooling box is connected to the flow control part. The transmission shafts are used to control the flow control part to regulate the flow rate of cooling water in the cooling box during rotation.

[0020] By adopting the above technical solution, the movable end of the water flow telescopic rod extends under the pressure of the expanding air, and drives the rack to slide. The rack drives the adjacent rack to slide, and the rack drives the meshing gear to rotate. The gear drives the transmission shaft to rotate. During the rotation, the transmission shaft controls the flow control part to regulate the flow of cooling water in the cooling box, so that the water flow telescopic rod can easily control the flow control part to regulate the flow of cooling water in the cooling box under the action of the expanding air.

[0021] Optionally, between two adjacent racks, a push rod is fixedly connected to the rack closer to the water flow telescopic rod, and a transmission plate is fixedly connected to the rack farther from the water flow telescopic rod. The transmission plate is inclined in a direction away from the push rod, and the plate surface abuts against the push rod.

[0022] By adopting the above technical solution, when the rack near the water flow telescopic rod slides, the rack drives the push rod to slide, the push rod pushes the inclined transmission plate to slide, and the transmission plate drives another rack adjacent to the rack to slide, thus making it easy for the water flow telescopic rod to drive multiple racks to slide simultaneously.

[0023] Optionally, multiple sets of flow control units are provided, each corresponding to one of the racks. Each set of flow control units contains multiple units, each corresponding to one of the multiple drive shafts in each set. Each flow control unit includes a guide plate, a flow control spring, and a control rod. Two guide plates are provided, facing each other. The guide plates are arranged along the direction of the cooling water flow, and their two sides are slidably connected to the two side walls of the cooling box. The sliding direction of the guide plates is perpendicular to the direction of the cooling water flow. Flow limiting plates are hinged to both ends of each guide plate. The two flow limiting plates of the two guide plates are hinged to each other on their closest sides. The flow control spring is fixedly connected between the two guide plates and is used to drive the two guide plates to slide in a direction that brings them closer together. The control rod is located between the two guide plates, and its two ends abut against the two guide plates respectively. The middle part of the control rod is fixedly connected to the drive shaft.

[0024] By adopting the above technical solution, the drive shaft drives the control rod to rotate, and the two ends of the control rod slide on two guide plates respectively. As the end of the control rod slides closer to the end of the guide plate, the two guide plates gradually slide towards each other under the action of the flow control spring. The two guide plates cause the two flow limiting plates at their ends to also rotate towards each other, making it easier to increase the flow rate of cooling water in the cooling box. As the end of the control rod slides closer to the middle of the guide plate, the two guide plates gradually slide away from each other under the action of the flow control spring. The two guide plates cause the two flow limiting plates at their ends to also rotate away from each other, making it easier to decrease the flow rate of cooling water in the cooling box. Thus, by controlling the two guide plates through the control rod and the flow control spring, the flow rate of cooling water in the cooling box can be easily regulated.

[0025] Optionally, the connections between the inlet flow control pipe and the temperature sensing box, the connections between the outlet flow control pipe and the temperature sensing box, and the connections between the water flow control pipe and the temperature sensing box are arranged in a direction away from the temperature sensing plate. A sliding plate is slidably disposed inside the temperature sensing box, which divides the temperature sensing box into two chambers. A temperature sensing spring is fixedly connected between the side of the sliding plate away from the temperature sensing plate and the side wall of the temperature sensing box. The temperature sensing spring is used to drive the sliding plate to slide between the connections between the inlet flow control pipe and the temperature sensing box and the connections between the outlet flow control pipe and the temperature sensing box.

[0026] By adopting the above technical solution, the temperature sensing plate transfers heat to the air, causing the air to expand. The expanded air first enters the water inlet telescopic rod through the water inlet control pipe, allowing the water inlet telescopic rod to regulate the flow rate of the water inlet pipe. As the air continues to expand, the expanded air pushes the sliding plate away from the temperature sensing plate. The expanded air then sequentially enters the water outlet telescopic rod through the water outlet control pipe and the water flow telescopic rod through the water flow control pipe. Thus, the vaporization box is cooled in stages according to the degree of air expansion, further refining the cooling effect of the vaporization box.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] By setting up multiple cooling boxes to cool different parts of the gasification box and regulating the flow rate of the inlet pipe, outlet pipe and cooling box, the cooling effect of the gasification box can be easily refined, and the biomass burner can easily achieve low-NOx combustion.

[0029] The heat of the vaporization box is transferred by the temperature sensing plate, which makes it easy to match the flow rate of the water inlet pipe, water outlet pipe and cooling box with the combustion temperature range of the vaporization box.

[0030] The distance between the two guide plates is adjusted by a control lever and a flow control spring, making it easy to control the flow rate inside the cooling box. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0032] Figure 2 It is a cross-sectional view intended to illustrate the inlet flow control assembly and the outlet flow control assembly;

[0033] Figure 3 It is a cross-sectional view intended to illustrate the water flow control components.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Gasification box; 2. Combustion box; 3. Cooling box; 31. Inlet pipe; 32. Outlet pipe; 4. Water pump; 41. Water tank; 5. Temperature sensing component; 51. Temperature sensing box; 52. Temperature sensing plate; 53. Slide plate; 54. Temperature sensing spring; 6. Inlet water flow control component; 61. Inlet water flow control pipe; 62. Inlet water telescopic rod; 63. Inlet water flow control plate; 64. First reset spring; 7. Outlet water flow control component; 71. Outlet water flow control pipe; 72. Outlet water... 73. Telescopic rod; 74. Water outlet flow control plate; 8. Second return spring; 9. Water flow control assembly; 10. Water flow control pipe; 11. Water flow telescopic rod; 12. Third return spring; 13. Transmission part; 14. Rack; 15. Push rod; 16. Transmission plate; 17. Gear; 18. Transmission shaft; 19. Flow control part; 10. Guide plate; 11. Flow limiting plate; 12. Flow control spring; 13. Control rod. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0037] This application discloses a low-NOx burner for biomass pyrolysis fuel. (Refer to...) Figure 1 A low-NOx biomass pyrolysis fuel burner includes a gasification chamber 1 and a combustion chamber 2. The gasification chamber 1 is connected to the combustion chamber 2. Multiple cooling boxes 3 are installed on the gasification chamber 1. The multiple cooling boxes 3 are connected to a water pump 4. The water pump 4 is connected to a water tank 41, which contains cooling water. Multiple sets of temperature sensing components 5 are installed on the gasification chamber 1, each corresponding to one of the cooling boxes 3. The temperature sensing components 5 are used to sense the temperature of the gasification chamber 1. The cooling boxes 3 are equipped with an inlet water flow control component 6 for regulating the inlet water flow of the cooling boxes 3, an outlet water flow control component 7 for regulating the outlet water flow of the cooling boxes 3, and a water flow control component 8 for regulating the internal flow of the cooling boxes 3. The inlet water flow control component 6, the outlet water flow control component 7, and the water flow control component 8 are all connected to the temperature sensing components 5.

[0038] When in use, the water pump 4 is started, and the water pump 4 draws the cooling water in the water tank 41 into multiple cooling boxes 3. The temperature sensing component 5 senses the temperature of the vaporization box 1, and drives the water inlet flow control component 6 to regulate the water inlet flow of the cooling box 3, drives the water outlet flow control component 7 to regulate the water outlet flow of the cooling box 3, and drives the water flow control component 8 to regulate the water flow in the cooling box 3. This makes it easy to adjust the cooling of the vaporization box 1 according to the combustion temperature range of different parts, so that the cooling effect of the vaporization box 1 can be refined.

[0039] Reference Figure 1 Both the vaporization box 1 and the combustion box 2 are rectangular boxes and are vertically arranged. The top of the vaporization box 1 is connected to the top of the combustion box 2 through a pipeline. The vaporization box 1 is used to burn and crack combustible gas, and the combustion box 2 is used to burn combustible gas to form a flame.

[0040] The cooling box 3 is rectangular and hollow inside. The cooling box 3 is curved into a rectangle that matches the vertical cross-section of the gasification box 1, with a gap between the two ends. The two ends of the cooling box 3 are located on the same side of the gasification box 1. Multiple cooling boxes 3 are arranged vertically and are all fixedly fitted onto the gasification box 1. The arrangement direction of the multiple cooling boxes 3 is the same as the combustion direction of the biomass particles in the gasification box 1. The side of the cooling box 3 closest to the gasification box 1 is attached to the outer wall of the gasification box 1.

[0041] A rectangular water inlet pipe 31 is connected to one end of the cooling box 3 on the side away from the vaporization box 1, and a rectangular water outlet pipe 32 is connected to the other end on the side away from the vaporization box 1. Multiple water inlet pipes 31 are connected to the outlet of the water pump 4 through pipelines, and multiple water outlet pipes 32 are connected to the water tank 41 through pipelines. Both the water inlet pipes 31 and the water outlet pipes 32 are set horizontally.

[0042] Reference Figure 2 The temperature sensing component 5 includes a temperature sensing box 51 and a temperature sensing plate 52. The temperature sensing box 51 is rectangular and vertically arranged. The temperature sensing box 51 is located between the two ends of the cooling box 3. The temperature sensing box 51 is fixedly connected to the vaporization box 1, and the bottom of the side near the vaporization box 1 is connected to the vaporization box 1. The connection between the temperature sensing box 51 and the vaporization box 1 is rectangular. The temperature sensing box 51 is filled with air.

[0043] The temperature sensing plate 52 is rectangular and is adapted to the connection between the temperature sensing box 51 and the vaporization box 1. The temperature sensing plate 52 is fixedly connected to the connection between the temperature sensing box 51 and the vaporization box 1. The temperature sensing plate 52 is made of graphite material.

[0044] The water inlet control assembly 6 includes a water inlet control pipe 61, a water inlet telescopic rod 62, and a water inlet control plate 63. The water inlet control plate 63 is rectangular and vertically arranged. The bottom end of the water inlet control plate 63 slides through the top surface of the water inlet pipe 31, and the width of the water inlet control plate 63 is equal to the width of the water inlet pipe 31. The water inlet telescopic rod 62 is located on one side of the water inlet control plate 63, and its extension direction is vertically upward. The water inlet telescopic rod 62 is fixedly connected to the top surface of the water inlet pipe 31, and its movable end is fixedly connected to the top end of the water inlet control plate 63. The space between the end of the water inlet telescopic rod 62 away from the movable end and the movable end is sealed. The two ends of the water inlet control pipe 61 are respectively connected to the temperature sensing box 51 and the end of the water inlet telescopic rod 62 away from the movable end.

[0045] A first return spring 64 is fixedly connected between the water inlet telescopic rod 62 and its movable end. The first return spring 64 is used to drive the movable end of the water inlet telescopic rod 62 to retract, and its stiffness matches the combustion temperature range of the vaporization box 1 part corresponding to the cooling box 3.

[0046] In use, cooling water flows into the cooling box 3 from the inlet pipe 31 and returns to the water tank 41 from the outlet pipe 32. The temperature sensing plate 52 senses the combustion temperature of the corresponding part of the vaporization box 1 and the cooling box 3, and transfers the heat in the vaporization box 1 to the temperature sensing box 51. The air in the temperature sensing box 51 expands due to the heat, and the expanded air is introduced into the water inlet telescopic rod 62 through the water inlet control pipe 61, pushing the movable end of the water inlet telescopic rod 62 to extend. The movable end of the water inlet telescopic rod 62 drives the water inlet control plate 63 to gradually slide out of the water inlet pipe 31, and the first reset is achieved. Spring 64 stores elastic force, increasing the flow rate of water inlet pipe 31. When the temperature of vaporization box 1 decreases, the expanding air contracts. The first return spring 64 causes the movable end of water inlet telescopic rod 62 to contract through elastic force. The movable end of water inlet telescopic rod 62 causes water inlet control plate 63 to slide into water inlet pipe 31, reducing the flow rate of water inlet pipe 31. Since the stiffness of the first return spring 64 matches the combustion temperature range of the vaporization box 1 corresponding to cooling box 3, the flow rate of water inlet pipe 31 can be finely controlled according to the temperature of vaporization box 1.

[0047] Reference Figure 2 The water flow control assembly 7 includes a water flow control pipe 71, a water flow telescopic rod 72, and a water flow control plate 73. The water flow control plate 73 is rectangular and vertically arranged. The bottom end of the water flow control plate 73 slides through the top surface of the water outlet pipe 32, and the width of the water flow control plate 73 is equal to the width of the water outlet pipe 32. The water flow telescopic rod 72 is located on one side of the water flow control plate 73, and its extension direction is vertically upward. The water flow telescopic rod 72 is fixedly connected to the top surface of the water outlet pipe 32, and its movable end is fixedly connected to the top end of the water flow control plate 73. The space between the end of the water flow telescopic rod 72 away from the movable end and the movable end is sealed. The two ends of the water flow control pipe 71 are respectively connected to the temperature sensing box 51 and the end of the water flow telescopic rod 72 away from the movable end.

[0048] A second return spring 74 is fixedly connected between the water outlet telescopic rod 72 and its movable end. The second return spring 74 is used to drive the movable end of the water outlet telescopic rod 72 to retract, and its stiffness matches the combustion temperature range of the vaporization box 1 part corresponding to the cooling box 3.

[0049] In use, the expanded air is introduced into the water outlet telescopic rod 72 through the water outlet control pipe 71, pushing the movable end of the water outlet telescopic rod 72 to extend. The movable end of the water outlet telescopic rod 72 drives the water outlet control plate 73 to gradually slide out of the water outlet pipe 32, and causes the second return spring 74 to accumulate elastic force, increasing the flow rate of the water outlet pipe 32. When the temperature of the vaporization box 1 decreases, the expanded air contracts, and the second return spring 74 causes the movable end of the water outlet telescopic rod 72 to contract through elastic force. The movable end of the water outlet telescopic rod 72 causes the water outlet control plate 73 to slide into the water outlet pipe 32, reducing the flow rate of the water outlet pipe 32. Since the stiffness of the second return spring 74 matches the combustion temperature range of the vaporization box 1 corresponding to the cooling box 3, the flow rate of the water outlet pipe 32 can also be finely controlled according to the temperature of the vaporization box 1, making the cooling effect of the vaporization box 1 easier to refine.

[0050] Reference Figure 2 and Figure 3 The water flow control assembly 8 includes a water flow control pipe 81, a water flow telescopic rod 82, a transmission part 83, and a flow control part 84. The water flow telescopic rod 82 is fixedly connected to the side of the cooling box 3 away from the vaporization box 1 and is located on the side of the inlet pipe 31 away from the outlet pipe 32. The extension and retraction direction of the water flow telescopic rod 82 is perpendicular to the side wall directly opposite the end of the vaporization box 1 and the end of the cooling box 3. The space between the end of the water flow telescopic rod 82 away from the movable end and the movable end is in a sealed state. The two ends of the water flow control pipe 81 are respectively connected to the temperature sensing box 51 and the end of the water flow telescopic rod 82 away from the movable end.

[0051] Reference Figure 3 A third return spring 821 is fixedly connected between the water flow telescopic rod 82 and its movable end. The third return spring 821 is used to drive the movable end of the water flow telescopic rod 82 to retract, and its stiffness matches the combustion temperature range of the vaporization box 1 part corresponding to the cooling box 3.

[0052] The transmission unit 83 includes a rack 831, a gear 832, and a transmission shaft 833. There are three racks 831. Two racks 831 correspond to the two side walls of the vaporization box 1 that are close to the temperature sensing box 51, respectively. The other rack 831 corresponds to the side wall of the vaporization box 1 that is away from the temperature sensing box 51. The rack 831 is slidably connected to the side of the cooling box 3 away from the vaporization box 1, and the sliding direction is horizontal. The sliding direction of the rack 831 is parallel to the side wall of the vaporization box 1 corresponding to it. The rack 831 closest to the water inlet pipe 31 is fixedly connected to the movable end of the water flow telescopic rod 82.

[0053] From the end of the cooling box 3 near the water inlet pipe 31 to the end of the cooling box 3 near the water outlet pipe 32, between two adjacent racks 831, the rack 831 near the water inlet pipe 31 is fixedly connected to a push rod 8311, and the rack 831 away from the water inlet pipe 31 is fixedly connected to a transmission plate 8312. The push rod 8311 is rectangular and its length direction is the same as that of the rack 831. The push rod 8311 is located at the end of the rack 831 away from the water inlet pipe 31. The transmission plate 8312 is fixedly connected to the end of the rack 831 near the water inlet pipe 31. The transmission plate 8312 is rectangular and is inclined in the direction away from the push rod 8311. The end of the push rod 8311 away from the rack 831 abuts against the plate surface of the transmission plate 8312.

[0054] There are three sets of gears 832 and drive shafts 833, each corresponding to a rack 831. Each set contains three gears 832 and three drive shafts 833. The three gears 832 in each set are located below the rack 831 and mesh with it. The gears 832 are rotatably connected to the cooling box 3 and are coaxially fixedly connected to the drive shaft 833. The drive shaft 833 rotatably passes through the side wall of the cooling box 3 away from the vaporization box 1.

[0055] Multiple sets of flow control sections 84 are provided, each corresponding to a rack 831. Each set of flow control sections 84 consists of three sections, each corresponding to a drive shaft 833. The flow control sections 84 are located inside the cooling box 3. Each flow control section 84 includes a guide plate 841, a flow control spring 842, and a control rod 843. The guide plate 841 is rectangular and there are two of them. The two guide plates 841 are positioned opposite each other and are horizontal. The length direction of the guide plate 841 is parallel to the flow direction of the cooling water. The two sides of the guide plate 841 along its length direction abut against the two side walls of the cooling box 3 and are slidably connected to the two side walls of the cooling box 3. The sliding direction of the two guide plates 841 is perpendicular to the flow direction of the cooling water.

[0056] Both ends of the guide plate 841 along its length are hinged to flow limiting plates 8411. The flow limiting plates 8411 are rectangular plates and are arranged parallel to the length of the guide plate 841. Both ends of the flow limiting plates 8411 along their length abut against the two side walls of the cooling box 3 and are slidably connected. The two flow limiting plates 8411 are hinged to each other on the side closest to each other at one end of the two guide plates 841, and the two flow limiting plates 8411 are arranged at an included angle.

[0057] Two flow control springs 842 are provided, both located between the two guide plates 841. The two flow control springs 842 are located at both ends of the length direction of the guide plate 841, and the two ends of the flow control springs 842 are fixedly connected to the two guide plates 841. The flow control springs 842 are used to drive the two guide plates 841 to slide towards each other.

[0058] The control lever 843 is rectangular and fixedly connected to the end of the drive shaft 833 away from the gear 832. The control lever 843 is perpendicular to the drive shaft 833. The control lever 843 is located between the two guide plates 841 and in the middle of the guide plates 841. The two ends of the control lever 843 abut against the sides of the two guide plates 841 that are close to each other.

[0059] In use, expanded air is introduced into the water flow telescopic rod 82 through the water flow control pipe 81, pushing the movable end of the water flow telescopic rod 82 to extend. The movable end of the water flow telescopic rod 82 drives the rack 831 to slide, and causes the third return spring 821 to accumulate elastic force. The rack 831 pushes the next adjacent rack 831 to slide through the push rod 8311 and the transmission plate 8312. The rack 831 drives the gear 832 to rotate, the gear 832 drives the transmission shaft 833 to rotate, and the transmission shaft 833 drives the control rod 843 to rotate. During rotation, the rod 843 gradually moves its two ends closer to the ends of the guide plate 841. The flow control spring 842 drives the two guide plates 841 to slide towards each other, and causes the two hinged flow limiting plates 8411 to rotate towards each other, thereby increasing the flow rate in the cooling box 3. Since the stiffness of the third return spring 821 matches the combustion temperature range of the vaporization box 1 corresponding to the cooling box 3, the flow rate in the cooling box 3 can also be finely controlled according to the temperature of the vaporization box 1.

[0060] Reference Figure 2 The connection points between the inlet water control pipe 61 and the temperature sensing box 51, the connection points between the outlet water control pipe 71 and the temperature sensing box 51, and the connection points between the water flow control pipe 81 and the temperature sensing box 51 are all located on the side of the temperature sensing box 51 closest to the inlet water pipe 31, and are arranged in a direction away from the temperature sensing plate 52. A sliding plate 53 is slidably installed inside the temperature sensing box 51. The sliding plate 53 is rectangular and horizontally arranged. The sliding plate 53 divides the temperature sensing box 51 into two cavities. A temperature sensing spring 54 is fixedly connected to the top surface of the temperature sensing box 51 on the side of the sliding plate 53 away from the temperature sensing plate 52. The temperature sensing spring 54 is used to drive the sliding plate 53 to slide between the connection points between the inlet water control pipe 61 and the temperature sensing box 51 and the connection points between the outlet water control pipe 71 and the temperature sensing box 51.

[0061] In use, the expanded air is first introduced into the water inlet control pipe 61. When the water inlet telescopic rod 62 is extended to its maximum position, the expanded air pushes the slide plate 53 to slide. Then, it is introduced into the water outlet control pipe 71. When the water outlet telescopic rod 72 is extended to its maximum position, the expanded air further pushes the slide plate 53 to slide and is introduced into the water flow control pipe 81. Thus, through the cooperation of the slide plate 53 and the temperature sensing spring 54, the cooling effect of the vaporization box 1 can be controlled in stages, thereby making the cooling effect of the vaporization box 1 easier to refine.

[0062] The implementation principle of a low-NOx biomass pyrolysis fuel gas burner according to an embodiment of this application is as follows: During use, the water pump 4 is started, and the water pump 4 introduces cooling water from the water tank 41 into the cooling box 3 through the inlet pipe 31. The cooling water in the cooling box 3 flows back to the water tank 41 through the outlet pipe 32. The heat from the gasification box 1 is transferred to the temperature sensing box 51 through the temperature sensing plate 52. The air inside the temperature sensing box 51 expands due to the heat, and the expanded air pushes the sliding plate 53 to slide. During the sliding process, the expanded air sequentially flows into the inlet control pipe 61, the outlet control pipe 71, and the water flow control pipe 81. The expanded air flows from the inlet control pipe 61 into the inlet telescopic rod 62, from the outlet control pipe 71 into the outlet telescopic rod 72, and from the water flow control pipe 81 into the water... The flow extension rod 82 and the inlet extension rod 62 push the inlet flow control plate 63 to slide, and the inlet flow control plate 63 adjusts the flow rate of the inlet pipe 31. The outlet extension rod 72 pushes the outlet flow control plate 73 to slide, and the outlet flow control plate 73 regulates the flow rate of the outlet pipe 32. The flow extension rod 82 drives the transmission shaft 833 to rotate through the rack 831 and the gear 832. The transmission shaft 833 drives the control rod 843 to rotate. The control rod 843 and the flow control spring 842 cooperate to regulate the distance between the two guide plates 841. The two guide plates 841 and the two flow limiting plates 841 regulate the flow rate in the cooling box 3. Thus, through the cooling of multiple cooling boxes 3 and the graded regulation of each cooling box 3, the cooling effect of the vaporization box 1 can be refined.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-NOx burner for biomass pyrolysis fuel gas, comprising a gasification chamber (1) and a combustion chamber (2), wherein the gasification chamber (1) and the combustion chamber (2) are connected, characterized in that, Multiple cooling boxes (3) are fixedly installed on the outer wall of the gasification box (1) along the combustion direction of the biomass pellets. One side of the cooling box (3) is attached to the outer wall of the gasification box (1). One end of the cooling box (3) is connected to a water inlet pipe (31). Multiple water inlet pipes (31) are connected to a water pump (4). The water pump (4) is connected to a water tank (41). The water tank (41) is filled with cooling water and is connected to the end of the multiple cooling boxes (3) away from the water inlet pipe (31). Multiple sets of temperature sensing components (5) corresponding to the cooling boxes (3) are fixedly connected to the side wall of the gasification box (1). A water inlet flow control component (6) connected to the temperature sensing component (5) is provided on the water inlet pipe (31). The temperature sensing component (5) is used to sense the temperature of the gasification box (1) and the cooling box (3) facing each other, and is used to drive the water inlet flow control component (6) to regulate the flow rate of the water inlet pipe (31). The temperature sensing component (5) includes a temperature sensing box (51) and a temperature sensing plate (52). The temperature sensing box (51) is fixedly connected to the vaporization box (1), and one end of the temperature sensing box (51) is connected to the vaporization box (1). The temperature sensing plate (52) is fixedly disposed at the connection between the temperature sensing box (51) and the vaporization box (1). The temperature sensing plate (52) is used to transfer the heat in the vaporization box (1) to the temperature sensing box (51). The temperature sensing box (51) is filled with air, and the expansion of the air drives the water inlet flow control component (6) to regulate the flow rate of the water inlet pipe (31). The water inlet flow control assembly (6) includes a water inlet flow control pipe (61), a water inlet telescopic rod (62), and a water inlet flow control plate (63). The two ends of the water inlet flow control pipe (61) are respectively connected to the temperature sensing box (51) and the end of the water inlet telescopic rod (62) away from the movable end. The water inlet telescopic rod (62) is fixedly connected to the water inlet pipe (31), and its movable end is fixedly connected to one end of the water inlet flow control plate (63). The other end of the water inlet flow control plate (63) is slidably inserted into the interior of the water inlet pipe (31). A first return spring (64) is fixedly connected between the water inlet telescopic rod (62) and its movable end. The first return spring (64) is used to drive the movable end of the water inlet telescopic rod (62) to retract, and its stiffness matches the combustion temperature range of the vaporization box (1) corresponding to the cooling box (3). A water flow control assembly (8) is provided on the cooling box (3). The water flow control assembly (8) includes a water flow control pipe (81), a water flow telescopic rod (82), a transmission part (83), and a control part (84). The two ends of the water flow control pipe (81) are respectively connected to the temperature sensing box (51) and the end of the water flow telescopic rod (82) away from the movable end. The water flow telescopic rod (82) is fixedly installed on the cooling box (3), and its movable end is connected to the transmission part (83). 83) Connected to the flow control unit (84), the flow control unit (84) is located inside the cooling box (3) and is used to regulate the flow rate of cooling water in the cooling box (3). A third return spring (821) is fixedly connected between the water flow telescopic rod (82) and its movable end. The third return spring (821) is used to drive the movable end of the water flow telescopic rod (82) to retract, and its stiffness matches the combustion temperature range of the gasification box (1) part corresponding to the cooling box (3).

2. The low-NOx burner for biomass pyrolysis fuel gas according to claim 1, characterized in that, The temperature sensing plate (52) is made of graphite material.

3. A low-NOx burner for biomass pyrolysis fuel gas according to claim 2, characterized in that, The cooling box (3) has an outlet pipe (32) connected to the end away from the inlet pipe (31). Multiple outlet pipes (32) are connected to the water tank (41). An outlet flow control assembly (7) is provided on each outlet pipe (32). The outlet flow control assembly (7) includes an outlet flow control pipe (71), an outlet telescopic rod (72), and an outlet flow control plate (73). Both ends of the outlet flow control pipe (71) are connected to the temperature sensing box (51) and the end of the outlet telescopic rod (72) away from its movable end, respectively. The outlet telescopic rod (7... 2) Fixedly connected to the water outlet pipe (32), and the movable end is fixedly connected to one end of the water outlet flow control plate (73). The other end of the water outlet flow control plate (73) is slidably inserted into the interior of the water outlet pipe (32). A second return spring (74) is fixedly connected between the water outlet telescopic rod (72) and its movable end. The second return spring (74) is used to drive the movable end of the water outlet telescopic rod (72) to retract, and its stiffness matches the combustion temperature range of the vaporization box (1) corresponding to the cooling box (3).

4. A low-NOx burner for biomass pyrolysis fuel gas according to claim 3, characterized in that, The vaporization box (1) is polygonal in shape. The temperature sensing box (51) is located on one side of the vaporization box (1). The transmission part (83) includes a rack (831), a gear (832), and a transmission shaft (833). Multiple racks (831) are provided, and they correspond one-to-one with the other side walls of the vaporization box (1). The racks (831) are slidably connected to the cooling box (3). The rack (831) near the water inlet pipe (31) is fixedly connected to the movable end of the water flow telescopic rod (82). Between two adjacent racks (831), the rack (831) near the water flow telescopic rod (82) is used to drive the rack (831) away from the water flow telescopic rod (82) to slide. The gear (832) 32) and the drive shaft (833) are provided in multiple sets, and each set corresponds to the rack (831). Each set of gears (832) and drive shafts (833) has multiple gears. The gears (832) mesh with the rack (831) and are rotatably connected to the cooling box (3). The drive shafts (833) correspond to the gears (832) and are coaxially fixedly connected to the gears (832). The drive shafts (833) are rotatably passed through the side wall of the cooling box (3), and one end of the drive shaft (833) located inside the cooling box (3) is connected to the flow control unit (84). The drive shafts (833) are used to control the flow control unit (84) to regulate the flow rate of the cooling water in the cooling box (3) during rotation.

5. A low-NOx burner for biomass pyrolysis fuel gas according to claim 4, characterized in that, Between two adjacent racks (831), the rack (831) closer to the water flow telescopic rod (82) is fixedly connected to a push rod (8311), and the rack (831) farther away from the water flow telescopic rod (82) is fixedly connected to a transmission plate (8312). The transmission plate (8312) is inclined in a direction away from the push rod (8311), and the plate surface abuts against the push rod (8311).

6. A low-NOx burner for biomass pyrolysis fuel gas according to claim 5, characterized in that, Multiple sets of flow control parts (84) are provided, each corresponding to one of the racks (831). Each set of flow control parts (84) has multiple components, each corresponding to one of the multiple drive shafts (833) in each set. Each flow control part (84) includes a guide plate (841), a flow control spring (842), and a control rod (843). Two guide plates (841) are provided, facing each other. The guide plates (841) are arranged along the direction of the cooling water flow, and their two sides are slidably connected to the two side walls of the cooling box (3). The sliding direction of the guide plates (841) is perpendicular to the direction of the cooling water flow. Both ends of the guide plate (841) are hinged to flow limiting plates (8411). The two flow limiting plates (8411) at one end of the two guide plates (841) are hinged to each other at the other side. The flow control spring (842) is fixedly connected between the two guide plates (841) and is used to drive the two guide plates (841) to slide in the direction of mutual approach. The control rod (843) is located between the two guide plates (841) and its two ends abut against the two guide plates (841) respectively. The middle part of the control rod (843) is fixedly connected to the transmission shaft (833).

7. A low-NOx burner for biomass pyrolysis fuel gas according to claim 6, characterized in that, The connection points of the inlet flow control pipe (61) and the temperature sensing box (51), the connection points of the outlet flow control pipe (71) and the temperature sensing box (51), and the connection points of the water flow control pipe (81) and the temperature sensing box (51) are arranged in a direction away from the temperature sensing plate (52). A sliding plate (53) is slidably disposed inside the temperature sensing box (51). The sliding plate (53) divides the temperature sensing box (51) into two chambers. A temperature sensing spring (54) is fixedly connected between the side of the sliding plate (53) away from the temperature sensing plate (52) and the side wall of the temperature sensing box (51). The temperature sensing spring (54) is used to drive the sliding plate (53) to slide between the connection points of the inlet flow control pipe (61) and the temperature sensing box (51) and the connection points of the outlet flow control pipe (71) and the temperature sensing box (51).

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