Special combined combustion equipment for biomass boiler and use method of special combined combustion equipment

Abstract

The invention relates to special combined combustion equipment for a biomass boiler and a using method of the special combined combustion equipment, and relates to the technical field of biomass boilers. The special combined combustion equipment comprises a boiler body, a feeding assembly, an outlet collecting box, a middle collecting box, a water-cooling fire grate assembly, an air blowing assembly and an exhaust heat exchange mechanism; a feeding assembly is arranged on one side of the boiler body, and a feeding section of the feeding assembly communicates with an inner cavity of the boiler body through an outlet header. The combustion device is tightly connected with all the components and is provided with the water cooling calandria, the heat exchange pipes, the main heat exchange cylinder, the secondary heat exchange cylinder, the branch pipes, the water cooling wall collecting box and the water cooling wall pipes, a communication path is established through the water cooling wall pipes and the water cooling wall collecting box which are arranged in a specific mode, heat can be conducted and distributed among all the components, and the heat exchange efficiency is improved. And the water-cooled wall header is communicated and connected with a plurality of water-cooled pipes through the combustion fire grate to form a complete and mutually associated thermal cycle structure, so that the heat in the combustion process is effectively utilized, regulated and controlled.

Description

Technical Field

[0001] The present application relates to the technical field of biomass boilers, and in particular to a special combined combustion device for biomass boilers and a method for using the same. Background Art

[0002] At present, biomass boilers play an important role in the field of renewable energy utilization and environmental protection. In order to improve combustion efficiency and reduce emissions, biomass boilers usually adopt a variety of design methods, among which the combustion equipment including the feeding system and boiler grate is one of the key ones; Traditional biomass boiler grates mainly include fixed and mechanical vibration grates, but they have certain limitations in dealing with the complex combustion characteristics of biomass fuels. Most traditional grates do not adopt a water-cooling design, which can easily cause the grate to be damaged, deformed or broken under long-term high-temperature operation, reducing its service life. At the same time, high temperature will also cause the thermal efficiency of the equipment to decrease, affecting the thermal efficiency and the overall performance of the boiler; in addition, fixed grates and conventional mechanical vibration grates are prone to ash accumulation during operation, affecting the full combustion of the fuel. This situation not only reduces the combustion efficiency, but also causes the boiler to be frequently shut down for cleaning, increasing maintenance costs. Finally, the vibration frequency and amplitude of traditional vibrating grates are difficult to accurately control during operation, which can easily cause uneven ash discharge and lead to unstable combustion. Especially for biomass fuels, the characteristics of different types of biomass ash are quite different, and uneven vibration may further lead to reduced combustion efficiency and increased emissions; For example, application number CN202110470453.0 discloses a biomass boiler, including a furnace body, a heating box is fixedly installed on the upper end of the furnace body, a storage bin is fixedly installed on the outer surface of the front end of the heating box, water pipes are fixedly installed at the center positions of both sides of the outer surface of the upper end of the heating box, an exhaust pipe is fixedly installed at the rear end of the furnace body, a feeding bin is fixedly installed at the lower end of the storage bin at the front end of the furnace body, an ash box is movably installed at the lower end of the feeding bin, a handle is fixedly installed at the center of the outer surface of the front end of the ash box, a blower is fixedly installed at the center of the upper end of the outer surface of one side of the furnace body, and a fan is fixedly installed at the middle of the upper end of the inner surface of the rear end of the furnace body. A through hole is provided at the center, an igniter is fixedly installed at the center position of the inner surface of the rear end of the furnace body, and a first groove is provided on the inner surface of the rear end of the furnace body below the igniter; the rotating shaft is used to realize the functions of automatically adding fuel to the boiler and automatically collecting fuel residues; the feeding system in the traditional combustion equipment has the problem of uneven feeding, because the feeding device cannot feed evenly, resulting in excessive fuel and insufficient combustion in some parts of the grate, which eventually leads to reduced thermal efficiency and ash accumulation and difficulty in slag removal. The traditional feeding system also has the problem of poor adaptability to biomass fuel, which leads to changes in ash characteristics and an increase in unburned fuel. Summary of the invention

[0003] The purpose of this application is to provide a special combined combustion device for biomass boilers and a method of using the same.

[0004] The present application provides a biomass boiler dedicated combined combustion device and a method of using the same, which adopts the following technical solutions: A special combined combustion device for a biomass boiler and a method of using the same, comprising a boiler body, a feed assembly, an outlet header, an intermediate header, a water-cooled grate assembly, a blast assembly and an exhaust heat exchange mechanism, wherein the boiler body is mounted on the upper end surface of a support seat, and a feed assembly is provided on one side of the boiler body, and a feed section of the feed assembly is connected to an inner cavity of the boiler body through the outlet header, an intermediate header is provided between the boiler body and the support seat, and a water-cooled grate assembly is provided below the intermediate header, a blast assembly is provided below the water-cooled grate assembly, an exhaust heat exchange mechanism is provided in the inner cavity of the boiler body, and the water-cooled grate assembly comprises a water cooling mechanism and a grate Mechanism, the water cooling mechanism is installed at the lower part of the inner side of the intermediate header, and a grate mechanism is arranged at the lower part of the water cooling mechanism, the water cooling mechanism includes a water cooling exhaust pipe and a heat exchange pipe, the water cooling exhaust pipe is installed at the lower part of the inner side of the intermediate header, and the water inlet end and the outlet end of the water cooling exhaust pipe are connected with the heat exchange pipe, the grate mechanism includes a driving sprocket and a driven sprocket, the driving sprocket and the driven sprocket are installed on the inner side of the support seat through a rotating shaft, and the outer diameter surfaces of the driving sprocket and the driven sprocket are meshed with a chain, a support frame is arranged on the inner side of the chain, and the support frame is connected with a plurality of support wheels through bearings, and a plurality of groups of driving sprockets, driven sprockets and chains are arranged.

[0005] Optionally, the feeding assembly includes a material box and a feed port, the feed port is installed on the upper end surface of the material box, and an observation window is provided on the side end surface of the material box, a pushing mechanism is provided below the inner cavity of the material box, and a discharge port is provided on one side of the pushing mechanism, and a waste discharge port is provided below the pushing mechanism, the pushing mechanism includes a hydraulic rod and a push rod, the telescopic end of the hydraulic rod is provided with a push rod, and the edge of the push rod is located at the edge of the inner cavity of the material box.

[0006] Optionally, the air blowing assembly includes an air supply pipe and an air supply hood, the air supply pipe is horizontally installed in the inner cavity of the support base, and the air supply pipe is connected to the air supply hood, the air supply hood is provided in several groups, and the air supply hood is located below the chain, and one end of the air supply pipe is connected to the output end of the blower.

[0007] Optionally, the bottom end surface of the support seat is provided with a cleaning groove, and there are two groups of cleaning grooves. The side wall of the inner cavity of the intermediate collecting box is installed with a water-cooled wall collecting box, and the water-cooled wall collecting box is connected to the water-cooled wall tube. There are two groups of water-cooled wall tubes, and the water-cooled wall tubes are connected to the exhaust heat exchange mechanism.

[0008] Optionally, the exhaust heat exchange mechanism includes a main chimney and a secondary chimney, the main chimney is installed in the inner cavity of the boiler body, and the main chimney is connected to the secondary chimney, a main heat exchange tube is arranged above the secondary chimney, and a secondary heat exchange tube is arranged below the secondary chimney, and the main heat exchange tube and the secondary heat exchange tube are connected to the water-cooled wall tube through a branch pipe.

[0009] Optionally, the water-cooled wall tubes and the partitions installed in the inner cavity of the boiler body constitute the main smoke duct in the exhaust heat exchange mechanism, the water-cooled wall tubes form a connecting structure with the water-cooled row pipes in the water-cooled grate assembly through the water-cooled wall header, and the water-cooled wall tubes form a connecting structure with the main heat exchange tube and the secondary heat exchange tube through the branch pipes in the exhaust heat exchange mechanism.

[0010] Optionally, the water-cooling exhaust pipe and the heat exchange pipe form a connecting structure, the driving sprocket and the driven sprocket form a chain transmission structure through a chain, the support frame is limitedly connected to the support wheel through a bearing, the driving sprocket and the driven sprocket are limitedly installed on the side wall of the inner cavity of the support seat through a rotating shaft, the outer diameter surface of the rotating shaft on which the driving sprocket is installed is provided with a first bevel gear, and the first bevel gear is meshingly connected with a second bevel gear, and the side end face of the second bevel gear is provided with an output shaft, and a combustion grate is installed on the inner side of the intermediate collecting box, and the combustion grate is arranged close to the water-cooling exhaust pipe.

[0011] Optionally, the feed port forms a connecting structure with the discharge port and the waste outlet through the material box, the material box forms a connecting structure with the outlet manifold through the discharge port, the outlet manifold and the inner cavity of the boiler body form a connecting structure, the push rod and the inner cavity of the material box form a sliding structure, the air supply pipe and the air supply hood form a connecting structure, the main smoke supply pipe and the secondary smoke supply pipe form a connecting structure, the water-cooled wall tube is arranged in a curved manner, and heat pipes are provided at both ends of the main heat exchange tube and the secondary heat exchange tube.

[0012] Optionally, a method for using a special combined combustion device for a biomass boiler comprises the following steps: Step 1: The combustion material is conveyed through the feeding assembly. First, the combustion material is poured into the material box through the feeding port, and the content of the combustion material is observed through the observation window. Then, the hydraulic rod in the pushing mechanism is started, and the hydraulic rod drives the push rod to push the combustion material. The push rod pushes the combustion material so that the combustion material enters the outlet header through the discharge port, and then the combustion material is conveyed to the upper end surface of the water-cooled grate assembly in the inner cavity of the boiler body. The combustion material that is missed is conveyed to the waste outlet through the push rod, and then the combustion material is discharged to prevent the remaining combustion material from affecting the push rod to push the combustion material; Step 2: The combustion material is burned on the water-cooling row pipe in the water-cooling mechanism of the water-cooling grate assembly, the combustion material is burned through the combustion grate, the temperature of the combustion grate is controlled by the water-cooling row pipe, and the temperature of the combustion grate is controlled by the water-cooling row pipe, wherein the combustion residue of the combustion material is transported by the driving sprocket, the driven sprocket and the chain, and the driving sprocket in the water-cooling grate assembly is driven to rotate by the output shaft and two sets of bevel gears, and the chain is supported by the support frame and the support wheel, and heat is transferred between the heat exchange tubes in the grate mechanism and the water-cooled wall header and the water-cooled wall tubes, and the heat generated by the combustion material is transferred to the main heat exchange cylinder and the secondary heat exchange cylinder, thereby realizing heat utilization; Step 3: During the combustion process, the combustion material is supplied with air through the air blowing assembly, wherein the blower is started, and the air generated by the blower is transported to the bottom of the combustion grate through the air supply pipe and the air supply hood to provide wind speed and oxygen, thereby ensuring that the combustion material is fully burned; Step 4: The heat generated by the combustion products during the combustion process is discharged and exchanged through the exhaust heat exchange mechanism, wherein the heat generated by the combustion products is transferred to the main heat exchange tube and the secondary heat exchange tube, and the smoke is discharged through the main smoke delivery tube and the secondary smoke delivery tube, and the water-cooled wall tube is used to further transfer heat during the smoke exhaust process, so that the heat generated by the water-cooled wall tube is transferred to the main heat exchange tube and the secondary heat exchange tube through the branch pipe, and the residue generated by the combustion products is discharged through the cleaning tank.

[0013] In summary, the present application includes at least one of the following beneficial technical effects: 1. The combustion device is tightly connected to each component, and water-cooled pipes, heat exchange tubes, main heat exchange tubes, secondary heat exchange tubes, branch pipes, water-cooled wall headers and water-cooled wall tubes are installed in the inner cavity of the boiler body. A communication path is established through multiple water-cooled wall tubes with a specific layout and the water-cooled wall header, so that heat can be orderly conducted and distributed among the components. The water-cooled wall header is connected to multiple water-cooled pipes through the combustion grate, forming a complete and interrelated heat cycle structure, ensuring that the heat in the combustion process can be effectively utilized and regulated, laying the foundation for the stable operation of the entire combustion device; 2. The feeding assembly is located on one side of the boiler body, and the feeding assembly includes a material box, a feed port, an observation window, a pushing mechanism, a discharge port, a waste outlet, a hydraulic rod and a push rod. The fuel is transported through the feeding assembly, the fuel is poured into the material box through the feed port, and the content of the fuel is observed through the observation window. Then the hydraulic rod in the pushing mechanism is started, and the hydraulic rod drives the push rod to push the fuel, and the push rod pushes the fuel so that the fuel enters the outlet header through the discharge port, and the fuel is transported to the upper end surface of the water-cooled grate assembly in the inner cavity of the boiler body, and the fuel that is missed is transported to the waste outlet through the push rod. The combustion materials are removed to avoid the remaining combustion materials affecting the push rod to push the combustion materials. The hydraulic rod has precise telescopic movement ability and can generate sufficient power. The hydraulic rod is connected to an external computer to set the corresponding program and parameters for pushing. When the hydraulic rod is started, the hydraulic rod drives the push rod to perform linear reciprocating motion. During the biomass fuel feeding process, the push rod can accurately and smoothly push the biomass fuel waiting for feeding outside the combustion chamber to the upper end surface of the water-cooled grate assembly in the inner cavity of the boiler body, ensuring that the fuel can smoothly enter the combustion link, and the pushing speed and pushing amount can be flexibly adjusted; 3. The grate mechanism in the water-cooled grate assembly is located at a specific position below the water-cooled mechanism, and the grate mechanism undertakes an important material conveying task in the entire combustion process, and can stably convey the biomass fuel dropped by the water-cooled mechanism due to combustion from the end of the combustion chamber away from the feed port to the end close to the feed port in a predetermined direction, and is provided with two sets of ash cleaning grooves to collect ash and other impurities dropped from the chain during the conveying process, so as to avoid adverse effects on the combustion environment and subsequent processes, and the driving sprocket, the driven sprocket and the chain constitute a residue conveying assembly, and a support frame and a support wheel are installed to support the chain, and the driving sprocket, the driven sprocket and the chain are arranged There are several groups, and several groups of driving sprockets, driven sprockets and chains are evenly arranged at a certain interval to transport the biomass fuel dropped due to combustion, and the output shaft and two groups of bevel gears can effectively transmit power to the driving sprocket. The output shaft and the driving sprocket are arranged vertically to drive the chain to rotate stably at a set speed and direction, ensuring that the transmission function of the entire chain is effectively realized. At the same time, because the chain is toothed, it can break up the unburned biomass fuel, so that these unburned materials can be evenly transported in a loose form, so that they can continue to burn during the chain transmission process, improve the utilization rate of fuel, and reduce energy waste and environmental pollution; 4. The water-cooled grate assembly is equipped with water-cooled pipes, heat exchange tubes, water-cooled wall headers and water-cooled wall tubes, and the cooling water circulating in the water-cooled pipes plays a key role in many aspects. On the one hand, the cooling water will cause slight vibrations during the flow process, which can further reduce the adverse effects of high temperature on the grate, and effectively prevent the damage to the grate structure and performance degradation caused by high temperature. On the other hand, the cooling water can effectively control the temperature of the combustion grate, and avoid the coking of biomass ash at the bottom ash melting point on the grate, thereby smoothly solving the ash discharge problem and ensuring the continuous and stable operation of the combustion device. The water-cooled pipes and heat exchange tubes fundamentally solve the problem of high-temperature loss, and prevent the combustion grate from being damaged, deformed or broken in a long-term high-temperature operation environment. Serious problems, greatly extending the service life of the grate, while the precise adjustment of the temperature, the water-cooled pipe can effectively prevent the thermal efficiency of the equipment from decreasing due to high temperature, so that the equipment always maintains a high thermal efficiency level, optimizes the energy utilization efficiency in the combustion process, and reduces the operating cost; 5. During the combustion process, the combustible material is supplied with air through the blower assembly, wherein the blower is started, and the wind generated by the blower is transported to the bottom of the combustion grate through the air supply pipe and the air supply hood to provide wind speed and oxygen, thereby ensuring that the combustible material is fully burned. The blower serves as a power source and is closely connected to the air supply pipe. When the blower is started, a strong airflow can be generated and transported to the air supply pipe, and the air supply pipe is connected to the air supply hood, and the air supply hood is arranged under the chain at specific intervals, and each air supply hood is connected to the air duct. During the combustion process, according to the different stages and needs of combustion, the air volume and air pressure in the air supply pipe can be adjusted to accurately distribute the right amount of air to each air supply hood. The hood provides sufficient and appropriate oxygen supply for the combustion of materials on the chain, ensuring that the combustion process is sufficient and efficient, so that the fuel can be fully burned to release the maximum energy, while reducing the emission of harmful gases caused by incomplete combustion, and improving the environmental protection performance and combustion efficiency of the combustion device. The heat generated by the combustion products during the combustion process is exhausted and exchanged by the exhaust heat exchange mechanism, wherein the heat generated by the combustion products is transferred to the main heat exchange cylinder and the secondary heat exchange cylinder, and the flue gas is discharged through the main and secondary flue gas pipes, and the water-cooled wall tubes are used to further transfer heat during the exhaust process, so as to transfer the heat generated by the water-cooled wall tubes to the main and secondary heat exchange cylinders through the branch pipes, and the residues generated by the combustion products are discharged through the cleaning tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front cross-section structure of the boiler body of the embodiment of the present application; Figure 2 It is a schematic diagram of the front cross-section structure of the water-cooled grate assembly of the embodiment of the present application; Figure 3is a schematic diagram of the front cross-sectional structure of the air blowing assembly of the embodiment of the present application; Figure 4 It is a schematic diagram of the front cross-section structure of the feeding assembly of the embodiment of the present application; Figure 5 It is a schematic diagram of the front cross-section structure of the exhaust heat exchange mechanism of the embodiment of the present application; Description of the reference numerals: 1. Boiler body; 2. Feeding assembly; 21. Material box; 22. Feed inlet; 23. Observation window; 24. Pushing mechanism; 25. Discharge outlet; 26. Waste outlet; 27. Hydraulic rod; 28. Pushing rod; 3. Outlet header; 4. Intermediate header; 5. Water-cooled grate assembly; 51. Water-cooling mechanism; 52. Grate mechanism; 53. Water-cooled row pipe; 54. Heat exchange pipe; 55. Driving sprocket; 56. Driven sprocket; 57, chain; 58, support frame; 59, support wheel; 6, air blowing assembly; 61, air supply pipe; 62, air supply hood; 63, blower; 7, exhaust heat exchange mechanism; 71, main supply chimney; 72, secondary supply chimney; 73, main heat exchange tube; 74, secondary heat exchange tube; 75, branch pipe; 8, support seat; 9, dust cleaning trough; 10, water-cooled wall header; 11, water-cooled wall tube; 12, partition; 13, output shaft. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1 To Attachment Figure 5 , further details of this application are given.

[0016] Embodiment: A special combined combustion device for a biomass boiler and a method of using the same, comprising a boiler body 1, a feed assembly 2, an outlet header 3, an intermediate header 4, a water-cooled grate assembly 5, a blast assembly 6 and an exhaust heat exchange mechanism 7, wherein the boiler body 1 is mounted on the upper end surface of a support seat 8, and a feed assembly 2 is disposed on one side of the boiler body 1, and a feed section of the feed assembly 2 is connected to the inner cavity of the boiler body 1 through the outlet header 3, an intermediate header 4 is disposed between the boiler body 1 and the support seat 8, and a water-cooled grate assembly 5 is disposed below the intermediate header 4, a blast assembly 6 is disposed below the water-cooled grate assembly 5, an exhaust heat exchange mechanism 7 is disposed in the inner cavity of the boiler body 1, the water-cooled grate assembly 5 comprises a water-cooling mechanism 51 and a grate mechanism 52, and the water-cooling mechanism 51 is installed A grate mechanism 52 is arranged below the inner side of the intermediate header 4 and below the water cooling mechanism 51. The water cooling mechanism 51 includes a water cooling exhaust pipe 53 and a heat exchange pipe 54. The water cooling exhaust pipe 53 is installed below the inner side of the intermediate header 4, and the water inlet end and the water outlet end of the water cooling exhaust pipe 53 are connected to the heat exchange pipe 54. The grate mechanism 52 includes a driving sprocket 55 and a driven sprocket 56. The driving sprocket 55 and the driven sprocket 56 are installed on the inner side of the support seat 8 through a rotating shaft, and the outer diameter surfaces of the driving sprocket 55 and the driven sprocket 56 are meshed and connected with a chain 57. A support frame 58 is arranged on the inner side of the chain 57, and the support frame 58 is connected with a plurality of support wheels 59 through bearings. The driving sprocket 55, the driven sprocket 56 and the chain 57 are all provided with a plurality of groups, wherein the combustion device The boiler body 1 is tightly connected with each other, and the inner cavity of the boiler body 1 is equipped with a water-cooled row pipe 53, a heat exchange tube 54, a main heat exchange tube 73, a secondary heat exchange tube 74, a branch pipe 75, a water-cooled wall header 10 and a water-cooled wall tube 11. A communication path is established between a plurality of water-cooled wall tubes 11 in a specific layout and the water-cooled wall header 10, so that heat can be orderly conducted and distributed between the various components. The water-cooled wall header 10 is connected with a plurality of water-cooled tubes by a combustion grate to form a complete and interrelated heat cycle structure, ensuring that the heat in the combustion process can be effectively utilized and regulated. The grate mechanism 52 in the water-cooled grate assembly 5 is located at a specific position below the water-cooled mechanism 51, and the grate mechanism 52 undertakes an important material conveying task in the entire combustion process, and can transfer water. The biomass fuel dropped due to combustion in the cooling mechanism 51 is stably conveyed from one end of the combustion chamber away from the feed port 22 to the other end close to the feed port 22 in a predetermined direction, and two groups of ash cleaning grooves 9 are provided to collect impurities such as ash dropped from the chain 57 during the conveying process. The driving sprocket 55, the driven sprocket 56 and the chain 57 form a residue conveying assembly, which is equipped with a support frame 58 and a support wheel 59 to support the chain 57. The driving sprocket 55, the driven sprocket 56 and the chain 57 are provided with several groups, and the several groups of driving sprockets 55, the driven sprocket 56 and the chain 57 are evenly arranged at a certain interval, so as to convey the biomass fuel dropped due to combustion. The output shaft 13 and the two groups of bevel gears can effectively transmit power to the driving sprocket 55.The output shaft 13 and the driving sprocket 55 are arranged vertically so as to drive the chain 57 to rotate stably at the set speed and direction, ensuring that the transmission function of the entire chain 57 is effectively realized. At the same time, since the chain 57 is toothed, the unburned biomass fuel is scattered and the unburned material is evenly transported in a loose form so as to continue to burn during the transmission process of the chain 57. The water-cooled grate assembly 5 is equipped with a water-cooled exhaust pipe 53, a heat exchange pipe 54, a water-cooled wall header 10 and a water-cooled wall tube 11, and the cooling water circulating in the water-cooled exhaust pipe 53 plays a key role in many aspects. On the one hand, the cooling water will cause Slight vibration, vibration can further reduce the adverse effects of high temperature on the grate, effectively prevent grate structure damage and performance degradation caused by high temperature, on the other hand, cooling water can effectively control the temperature of the combustion grate, avoid biomass ash with bottom ash melting point from coking on the grate, and smoothly solve the ash discharge problem. The use of water-cooled pipes 53 and heat exchange pipes 54 fundamentally solves the problem of high-temperature loss, prevents the combustion grate from being damaged, deformed or broken in a long-term high-temperature operation environment, and greatly extends the service life of the grate. The water-cooled pipe 53 can effectively prevent the thermal efficiency of the equipment from decreasing due to high temperature, so that the equipment always maintains a high thermal efficiency level;, The feeding assembly 2 includes a material box 21 and a feed port 22, the upper end surface of the material box 21 is provided with the feed port 22, and the side end surface of the material box 21 is provided with an observation window 23, a pushing mechanism 24 is provided below the inner cavity of the material box 21, and a discharge port 25 is provided on one side of the pushing mechanism 24, and a waste discharge port 26 is provided below the pushing mechanism 24, the pushing mechanism 24 includes a hydraulic rod 27 and a push rod 28, the telescopic end of the hydraulic rod 27 is provided with a push rod 28, and the edge of the push rod 28 is located at the edge of the inner cavity of the material box 21, wherein the feeding assembly 2 is located on one side of the boiler body 1, and the feeding assembly 2 includes the material box 21, the feed port 22, the observation window 23, the pushing mechanism 24, the discharge port 25, the waste discharge port 26, the hydraulic rod 27 and the push rod 28, wherein the feeding assembly 2 is used to transport the combustion material, the combustion material is poured into the material box 21 through the feed port 22, the combustion material content is observed through the observation window 23, and the push rod 28 is started. The hydraulic rod 27 in the material mechanism 24 drives the push rod 28 to push the combustion material, so that the combustion material enters the outlet header 3 through the discharge port 25, and the combustion material is transported to the upper end surface of the water-cooled grate assembly 5 in the inner cavity of the boiler body 1. The combustion material that is missed is transported to the waste outlet 26 by the push rod 28 to discharge the combustion material, so as to avoid the remaining combustion material affecting the push rod 28 to push the combustion material. The hydraulic rod 27 has precise telescopic movement ability and can generate sufficient power. The hydraulic rod 27 is connected to an external computer and a hydraulic pump to set the corresponding program and parameters for pushing the material. When the hydraulic rod 27 is started, the hydraulic rod 27 drives the push rod 28 to perform linear reciprocating motion. In the process of feeding biomass fuel, the push rod 28 can accurately and smoothly push the biomass fuel waiting for feeding outside the combustion chamber to the upper end surface of the water-cooled grate assembly 5 in the inner cavity of the boiler body 1; The blast assembly 6 includes an air supply pipe 61 and an air supply cover 62. The air supply pipe 61 is horizontally installed in the inner cavity of the support seat 8, and the air supply pipe 61 is connected to the air supply cover 62. The air supply cover 62 is provided with a plurality of groups, and the air supply cover 62 is located below the chain 57. One end of the air supply pipe 61 is connected to the output end of the blower 63. The bottom end surface of the support seat 8 is provided with a dust cleaning groove 9, and the dust cleaning groove 9 is provided with two groups. The side wall of the inner cavity of the intermediate header 4 is installed with a water-cooled wall header 10, and the water-cooled wall header 10 is connected to the water-cooled wall header 10. The wall tube 11 is provided with two groups of water-cooled wall tubes 11, and the water-cooled wall tubes 11 are connected with the exhaust heat exchange mechanism 7. The exhaust heat exchange mechanism 7 includes a main chimney 71 and a secondary chimney 72. The main chimney 71 is installed in the inner cavity of the boiler body 1, and the main chimney 71 is connected with the secondary chimney 72. A main heat exchange tube 73 is provided above the secondary chimney 72, and a secondary heat exchange tube 74 is provided below the secondary chimney 72. The main heat exchange tube 73 and the secondary heat exchange tube 74 are connected with the water-cooled wall tube 11 through a branch pipe 75. The water-cooled wall tube 11 and the partition 12 installed in the inner cavity of the boiler body 1 constitute the main smoke delivery tube 71 in the exhaust heat exchange mechanism 7. The water-cooled wall tube 11 forms a communication structure with the water-cooled exhaust pipe 53 in the water-cooled grate assembly 5 through the water-cooled wall header 10. The water-cooled wall tube 11 forms a communication structure with the main heat exchange tube 73 and the secondary heat exchange tube 74 through the branch pipe 75 in the exhaust heat exchange mechanism 7. The water-cooled exhaust pipe 53 and the heat exchange tube 54 form a communication structure. The driving sprocket 55 and the driven sprocket 56 form a chain transmission structure through the chain 57. The support frame 58 is limitedly connected with the support wheel 59 through the bearing. The driving sprocket 55 and the driven sprocket 56 are limitedly installed on the side wall of the inner cavity of the support seat 8 through the rotating shaft. The outer diameter surface of the rotating shaft on which the driving sprocket 55 is installed is provided with a A bevel gear is provided, and the first bevel gear is meshedly connected with the second bevel gear, and the side end face of the second bevel gear is installed with an output shaft 13, and a combustion grate is installed on the inner side of the intermediate header 4, and the combustion grate is arranged close to the water-cooled exhaust pipe 53, the feed port 22 forms a communication structure with the discharge port 25 and the waste discharge port 26 through the material box 21, the material box 21 forms a communication structure with the outlet header 3 through the discharge port 25, the outlet header 3 and the inner cavity of the boiler body 1 form a communication structure, the push rod 28 and the inner cavity of the material box 21 form a sliding structure, the air supply pipe 61 and the air supply cover 62 form a communication structure, the main smoke supply pipe 71 and the secondary smoke supply pipe 72 form a communication structure, the water-cooled wall tube 11 is arranged in a bent manner, and both ends of the main heat exchange tube 73 and the secondary heat exchange tube 74 are provided with There is a heat pipe, in which the combustion material is in the process of combustion, and the air is supplied by the blower assembly 6, wherein the blower 63 is started, and the wind generated by the blower 63 is transported to the bottom of the combustion grate through the air supply pipe 61 and the air supply hood 62 to provide wind speed and oxygen, so as to ensure that the combustion material is fully burned. When the blower 63 is started, a strong airflow can be generated and transported to the air supply pipe 61, and the air supply hood 62 is connected to the air supply pipe 61, and the air supply hood 62 is arranged under the chain 57 at a specific interval, and each air supply hood 62 is kept in communication with the air duct. During the combustion process, according to the different stages and needs of combustion, the air volume and air pressure in the air supply pipe 61 are adjusted to accurately distribute the appropriate amount of air to each air supply hood 6 2. Provide sufficient and appropriate oxygen supply for the combustion of materials on the chain 57 to ensure that the combustion process is sufficient and efficient, while reducing the emission of harmful gases caused by incomplete combustion, and improving the environmental protection performance and combustion efficiency of the combustion device. The heat generated by the combustion material during the combustion process is discharged and exchanged through the exhaust heat exchange mechanism 7, wherein the heat generated by the combustion material is transferred to the main heat exchange tube 73 and the secondary heat exchange tube 74, and the flue gas is discharged through the main smoke delivery tube 71 and the secondary smoke delivery tube 72, and in the process of exhausting smoke, the water-cooled wall tube 11 is used to further transfer heat, and the branch pipe 75 is used to transfer the heat generated by the water-cooled wall tube 11 to the main heat exchange tube 73 and the secondary heat exchange tube 74, and the residue generated by the combustion material is discharged through the cleaning tank 9.

[0017] The method of use includes the following steps: Step 1: The fuel is conveyed through the feeding assembly 2. First, the fuel is poured into the material box 21 through the feed port 22, and the content of the fuel is observed through the observation window 23. Then, the hydraulic rod 27 in the pushing mechanism 24 is started, and the hydraulic rod 27 drives the push rod 28 to push the fuel. The push rod 28 pushes the fuel so that the fuel passes through the discharge port 25 and enters the outlet header 3, and then the fuel is conveyed to the upper end surface of the water-cooled grate assembly 5 in the inner cavity of the boiler body 1. The fuel that is missed is conveyed to the waste outlet 26 through the push rod 28, and then the fuel is discharged to prevent the remaining fuel from affecting the push rod 28 in pushing the fuel. Step 2: The combustion product is burned on the water-cooling row pipe 53 in the water-cooling mechanism 51 in the water-cooling grate assembly 5, and the combustion product is burned through the combustion grate. The temperature of the combustion grate is controlled by the water-cooling row pipe 53, and the temperature of the combustion grate is controlled by the water-cooling row pipe 53. The combustion residue of the combustion product is transported by the driving sprocket 55, the driven sprocket 56 and the chain 57, and the driving sprocket 55 in the water-cooling grate assembly 5 is driven to rotate by the output shaft 13 and two sets of bevel gears, and the chain 57 is supported by the support frame 58 and the support wheel 59, and the heat transfer is carried out between the heat exchange tube 54 in the grate mechanism 52 and the water-cooled wall header 10 and the water-cooled wall tube 11, and the heat generated by the combustion product is transferred to the main heat exchange tube 73 and the secondary heat exchange tube 74, thereby realizing heat utilization; Step 3: During the combustion of the combustion material, air is supplied through the air blowing assembly 6, wherein the blower 63 is started, and the air generated by the blower 63 is transported to the bottom of the combustion grate through the air supply pipe 61 and the air supply cover 62 to increase the wind speed and provide oxygen, thereby ensuring that the combustion material is fully burned; Step 4: The heat generated by the combustion products during the combustion process is discharged and exchanged through the exhaust heat exchange mechanism 7, wherein the heat generated by the combustion products is transferred to the main heat exchange tube 73 and the secondary heat exchange tube 74, and the smoke is discharged through the main smoke delivery tube 71 and the secondary smoke delivery tube 72, and the water-cooled wall tube 11 is used to further transfer heat during the smoke exhaust process, so that the heat generated by the water-cooled wall tube 11 is transferred to the main heat exchange tube 73 and the secondary heat exchange tube 74 through the branch pipe 75, and the residue generated by the combustion products is discharged through the cleaning tank 9.

[0018] The implementation principle of the embodiment of the present application is as follows: first, the fuel is conveyed by the feeding assembly 2, the fuel is poured into the material box 21 by the feeding port 22, and the content of the fuel is observed through the observation window 23, and then the hydraulic rod 27 in the pushing mechanism 24 is started, and the hydraulic rod 27 drives the push rod 28 to push the fuel, so that the fuel enters the outlet header 3 through the discharge port 25, and the fuel is conveyed to the upper end surface of the water-cooled grate assembly 5 in the inner cavity of the boiler body 1, and the fuel that is missed is conveyed to the waste outlet 26 by the push rod 28, and the fuel is discharged. , to prevent the remaining combustion products from affecting the push rod 28 in pushing the combustion products, wherein the combustion products are burned on the water-cooling pipe 53 in the water-cooling mechanism 51 in the water-cooling grate assembly 5, and the combustion products are burned by the combustion grate, and the temperature of the combustion grate is controlled by the water-cooling pipe 53, and the temperature of the combustion grate is controlled by the water-cooling pipe 53, wherein the combustion residue of the combustion products is transported by the driving sprocket 55, the driven sprocket 56 and the chain 57, wherein the output shaft 13 and the two sets of bevel gears are used to drive the driving chain in the water-cooling grate assembly 5 The wheel 55 rotates, and the chain 57 is supported by the support frame 58 and the support wheel 59, and the heat exchange tube 54 in the grate mechanism 52 is used to transfer heat with the water-cooled wall header 10 and the water-cooled wall tube 11, and the heat generated by the combustion is transferred to the main heat exchange cylinder 73 and the secondary heat exchange cylinder 74 to achieve heat utilization. During the combustion of the combustion, the air blower assembly 6 is used to supply air, wherein the blower 63 is started, and the air generated by the blower 63 is transported to the bottom of the combustion grate through the air supply pipe 61 and the air supply cover 62 to adjust the wind speed and oxygen. Provided to ensure that the combustion products are fully burned, the heat generated by the combustion products during the combustion process is exhausted and exchanged using the exhaust heat exchange mechanism 7, wherein the heat generated by the combustion products is transferred to the main heat exchange tube 73 and the secondary heat exchange tube 74, and the flue gas is discharged using the main smoke delivery tube 71 and the secondary smoke delivery tube 72, and in the process of exhausting the smoke, the heat is further transferred through the water-cooled wall tube 11, so that the heat generated by the water-cooled wall tube 11 is transferred to the main heat exchange tube 73 and the secondary heat exchange tube 74 using the branch pipe 75, and the residue generated by the combustion products is discharged through the cleaning tank 9.

[0019] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A combined combustion device for a biomass boiler, comprising a boiler body (1), a feed assembly (2), an outlet header (3), an intermediate header (4), a water-cooled grate assembly (5), an air blast assembly (6) and an exhaust heat exchange mechanism (7), characterized in that: The boiler body (1) is mounted on the upper end surface of the support seat (8), and a feeding assembly (2) is provided on one side of the boiler body (1), and the feeding section of the feeding assembly (2) is connected to the inner cavity of the boiler body (1) through an outlet header (3). An intermediate header (4) is provided between the boiler body (1) and the support seat (8), and a water-cooling grate assembly (5) is provided below the intermediate header (4), and a blast assembly (6) is provided below the water-cooling grate assembly (5). An exhaust heat exchange mechanism (7) is provided in the inner cavity of the boiler body (1), and the water-cooling grate assembly (5) comprises a water-cooling mechanism (51) and a grate mechanism (52). The water-cooling mechanism (51) is mounted below the inner side of the intermediate header (4), and a grate mechanism (52) is provided below the water-cooling mechanism (51). The water cooling mechanism (51) comprises a water cooling exhaust pipe (53) and a heat exchange pipe (54), wherein the water cooling exhaust pipe (53) is installed at the lower part of the inner side of the intermediate header (4), and the water inlet end and the water outlet end of the water cooling exhaust pipe (53) are connected to the heat exchange pipe (54). The grate mechanism (52) comprises a driving sprocket (55) and a driven sprocket (56), wherein the driving sprocket (55) and the driven sprocket (56) are installed on the inner side of the support seat (8) via a rotating shaft, and the outer diameter surfaces of the driving sprocket (55) and the driven sprocket (56) are meshedly connected with a chain (57), and a support frame (58) is provided on the inner side of the chain (57), and the support frame (58) is connected to a plurality of groups of support wheels (59) via bearings, and the driving sprocket (55), the driven sprocket (56) and the chain (57) are each provided with a plurality of groups.

2. A biomass boiler dedicated combined combustion equipment according to claim 1, characterized in that: The feeding assembly (2) comprises a material box (21) and a material feed port (22); the material feed port (22) is installed on the upper end surface of the material box (21), and the side end surface of the material box (21) is provided with an observation window (23); a material pushing mechanism (24) is provided below the inner cavity of the material box (21), and a material discharge port (25) is provided on one side of the material pushing mechanism (24); a waste discharge port (26) is provided below the material pushing mechanism (24); the material pushing mechanism (24) comprises a hydraulic rod (27) and a push rod (28); the push rod (28) is provided at the telescopic end of the hydraulic rod (27), and the edge of the push rod (28) is located at the edge of the inner cavity of the material box (21).

3. The biomass boiler dedicated combined combustion equipment according to claim 2, characterized in that: The air blowing assembly (6) comprises an air supply pipe (61) and an air supply cover (62); the air supply pipe (61) is transversely mounted in the inner cavity of the support seat (8), and the air supply pipe (61) is connected to the air supply cover (62); a plurality of groups of air supply covers (62) are provided, and the air supply covers (62) are located below the chain (57); one end of the air supply pipe (61) is connected to the output end of the blower (63).

4. The biomass boiler dedicated combined combustion equipment according to claim 3 is characterized by: The bottom end surface of the support seat (8) is provided with a cleaning groove (9), and two groups of cleaning grooves (9) are provided. The side wall of the inner cavity of the intermediate header (4) is installed with a water-cooled wall header (10), and the water-cooled wall header (10) is connected to the water-cooled wall tube (11). Two groups of water-cooled wall tubes (11) are provided, and the water-cooled wall tubes (11) are connected to the exhaust heat exchange mechanism (7).

5. The biomass boiler dedicated combined combustion equipment according to claim 4, characterized in that: The exhaust heat exchange mechanism (7) comprises a main smoke supply pipe (71) and a secondary smoke supply pipe (72); the main smoke supply pipe (71) is installed in the inner cavity of the boiler body (1), and the main smoke supply pipe (71) is connected to the secondary smoke supply pipe (72); a main heat exchange pipe (73) is arranged above the secondary smoke supply pipe (72), and a secondary heat exchange pipe (74) is arranged below the secondary smoke supply pipe (72); the main heat exchange pipe (73) and the secondary heat exchange pipe (74) are connected to the water-cooled wall pipe (11) through a branch pipe (75).

6. The biomass boiler dedicated combined combustion equipment according to claim 5, characterized in that: The water-cooled wall tube (11) and the partition (12) installed in the inner cavity of the boiler body (1) form a main smoke supply pipe (71) in the exhaust heat exchange mechanism (7); the water-cooled wall tube (11) forms a communication structure with the water-cooled discharge pipe (53) in the water-cooled grate assembly (5) through the water-cooled wall header (10); and the water-cooled wall tube (11) forms a communication structure with the main heat exchange tube (73) and the secondary heat exchange tube (74) through the branch pipe (75) in the exhaust heat exchange mechanism (7).

7. The biomass boiler dedicated combined combustion equipment according to claim 1, characterized in that: The water-cooling exhaust pipe (53) and the heat exchange pipe (54) form a communication structure; the driving sprocket (55) and the driven sprocket (56) form a chain transmission structure through a chain (57); the support frame (58) is limitedly connected to the support wheel (59) through a bearing; the driving sprocket (55) and the driven sprocket (56) are limitedly installed on the side wall of the inner cavity of the support seat (8) through a rotating shaft; a first bevel gear is installed on the outer diameter surface of the rotating shaft on which the driving sprocket (55) is installed, and the first bevel gear is meshingly connected to the second bevel gear, and the side end surface of the second bevel gear is installed with an output shaft (13); a combustion grate is installed on the inner side of the intermediate header (4), and the combustion grate is arranged close to the water-cooling exhaust pipe (53).

8. The biomass boiler dedicated combined combustion equipment according to claim 5, characterized in that: The feed port (22) forms a communication structure with the discharge port (25) and the waste outlet (26) through the material box (21); the material box (21) forms a communication structure with the outlet header (3) through the discharge port (25); the outlet header (3) forms a communication structure with the inner cavity of the boiler body (1); the push rod (28) forms a sliding structure with the inner cavity of the material box (21); the air supply pipe (61) forms a communication structure with the air supply cover (62); the main smoke supply pipe (71) forms a communication structure with the secondary smoke supply pipe (72); the water-cooled wall tube (11) is arranged in a bent manner; and heat pipes are provided at both ends of the main heat exchange tube (73) and the secondary heat exchange tube (74).

9. A method for using a special combined combustion device for a biomass boiler, using the special combined combustion device for a biomass boiler according to any one of claims 1 to 8, characterized in that: The method of use comprises the following steps: Step 1: The fuel is conveyed through the feeding assembly (2), firstly, the fuel is poured into the material box (21) through the feeding port (22), and the content of the fuel is observed through the observation window (23), and then the hydraulic rod (27) in the pushing mechanism (24) is started, and the hydraulic rod (27) drives the push rod (28) to push the fuel, and the push rod (28) pushes the fuel so that the fuel passes through the discharge port (25) and enters the outlet header (3), and then the fuel is conveyed to the upper end surface of the water-cooled grate assembly (5) in the inner cavity of the boiler body (1), and the fuel that is missed is conveyed to the waste outlet (26) through the push rod (28), and then the fuel is discharged, so as to prevent the remaining fuel from affecting the pushing of the fuel by the push rod (28); Step 2: The combustion material is burned on the water-cooling row pipe (53) in the water-cooling mechanism (51) in the water-cooling grate assembly (5), the combustion material is burned through the combustion grate, the temperature of the combustion grate is controlled by the water-cooling row pipe (53), and the temperature of the combustion grate is controlled by the water-cooling row pipe (53), wherein the combustion residue of the combustion material is transported by the driving sprocket (55), the driven sprocket (56) and the chain (57), wherein the driving sprocket (55) in the water-cooling grate assembly (5) is driven to rotate by the output shaft (13) and the two sets of bevel gears, wherein the chain (57) is supported by the support frame (58) and the support wheel (59), and heat is transferred through the heat exchange tube (54) in the grate mechanism (52) and the water-cooled wall header (10) and the water-cooled wall tube (11), and the heat generated by the combustion material is transferred to the main heat exchange cylinder (73) and the secondary heat exchange cylinder (74), thereby realizing heat utilization; Step 3: During the combustion process of the combustible, air is supplied through the air blowing assembly (6), wherein the blower (63) is started, and the air generated by the blower (63) is transported to the bottom of the combustion grate through the air supply pipe (61) and the air supply cover (62) to increase the wind speed and provide oxygen, thereby ensuring that the combustible is fully burned; Step 4: The heat generated by the combustion products during the combustion process is discharged and exchanged through the exhaust heat exchange mechanism (7), wherein the heat generated by the combustion products is transferred to the main heat exchange tube (73) and the secondary heat exchange tube (74), and the smoke is discharged through the main smoke delivery tube (71) and the secondary smoke delivery tube (72), and the water-cooled wall tube (11) is used to further transfer heat during the smoke exhaust process, so that the heat generated by the water-cooled wall tube (11) is transferred to the main heat exchange tube (73) and the secondary heat exchange tube (74) through the branch pipe (75), and the residue generated by the combustion products is discharged through the ash cleaning tank (9).

Images