A biomass boiler device based on two-phase synergistic combustion of layer combustion and chamber combustion

Abstract

This invention relates to the technical field of biomass boilers, and particularly to a biomass boiler device based on dual-phase co-combustion of stoker and chamber combustion. The device includes a boiler unit with a protective layer and a protective shell on its outer wall. A dual-combustion mechanism is located inside the boiler unit. A cooling mechanism is installed on the outer wall of the boiler unit. A solid feed inlet and a conveying mechanism are also located on the outer wall of the boiler unit. This biomass boiler device based on dual-phase co-combustion of stoker and chamber combustion facilitates the transport and combustion of biomass fuel by using conveyor rails and a grate. The conveyor rails are evenly spaced inside the boiler unit, and the grate positions correspond one-to-one with the conveyor rails, ensuring uniform distribution of biomass fuel during combustion and improving combustion completeness.

Description

Technical Field

[0001] This invention relates to the technical field of biomass boilers, and in particular to a biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion. Background Technology

[0002] Biomass boilers are a type of boiler that uses biomass energy as fuel. They are categorized into biomass steam boilers, biomass hot water boilers, biomass hot air furnaces, biomass thermal oil furnaces, vertical biomass boilers, and horizontal biomass boilers. These boilers utilize the most suitable combustion equipment for biomass fuels—a reciprocating grate. In terms of structural design, they have a larger furnace space compared to traditional boilers, and a highly optimized arrangement of secondary air facilitates the complete combustion of the large amount of volatiles released instantaneously during biomass fuel combustion. The boiler can be equipped with an oil (gas) ignition burner for automated ignition. Feeding, combustion, slag removal, water supply, and ignition can all be automatically controlled, making operation very convenient. The boiler is equipped with an automatic ash removal device to promptly remove ash accumulation on the boiler's heating surfaces, ensuring efficient and stable operation. An economizer is located at the boiler's tail end, and an air preheater can also be installed according to user needs. Compared to traditional boilers, these boilers are more efficient and have lower flue gas temperatures. Using high-efficiency insulation materials, the boiler surface temperature is low, and heat loss is negligible. The biggest advantages of biomass boilers are that they are energy-saving, environmentally friendly, and easy to install and use.

[0003] Currently available biomass boilers have the following problems when in use:

[0004] Traditional biomass boilers mostly employ a single combustion mode, making it difficult to balance combustion efficiency and environmental protection requirements. Specifically, in the stoker combustion stage, uneven fuel density leads to incomplete combustion, and obstructed grate ventilation easily creates localized high-temperature zones, resulting in increased emissions of harmful gases. In the chamber combustion stage, insufficient gas-solid mixing leads to problems such as excessively high carbon content in fly ash and incomplete combustion reactions. Summary of the Invention

[0005] The purpose of this invention is to provide a biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion, comprising a boiler device, wherein a protective layer is provided on the outer wall of the boiler device, a protective shell is provided on the outer wall of the boiler device, a dual-combustion mechanism is provided inside the boiler device, a cooling mechanism is provided on the outer wall of the boiler device, a solid feed inlet is provided on the outer wall of the boiler device, and a conveying mechanism is provided on the outer wall of the boiler device;

[0007] The dual-combustion mechanism includes a front cover, a furnace cavity, a rear cover, a conveyor rail, and a grate. The front cover is installed inside the boiler equipment, the furnace cavity is installed on the outer wall of the front cover, the rear cover is installed inside the furnace cavity, the conveyor rail is installed above the furnace cavity, and the grate is installed inside the conveyor rail.

[0008] The protective layer includes a heat insulation layer, a heat insulation layer, a cooling layer, and a protective layer. The outer wall of the boiler equipment is provided with a heat insulation layer, the outer wall of the heat insulation layer is provided with a heat insulation layer, the outer wall of the heat insulation layer is provided with a cooling layer, and the outer wall of the cooling layer is provided with a protective layer.

[0009] The cooling mechanism includes a water pump, a water supply pipe, a water outlet pipe, a water outlet column, and a spray pipe. The water pump is installed on the outer wall of the boiler equipment. A water supply pipe is installed at one end of the boiler equipment. A water outlet pipe is installed at one end of the water pump. A water outlet column is installed at one end of the water outlet pipe. A spray pipe is installed on the outer wall of the water outlet column.

[0010] The spray pipes are evenly distributed on the outer wall of the water column, and the spray pipes are symmetrically arranged about the central axis of the water column.

[0011] Preferably, the conveying mechanism includes a base plate, a motor, a housing, a screw rod, and a fixing plate. The base plate is provided on the outer wall of the boiler equipment, the motor is installed on the base plate, the housing is provided on the outer wall of the base plate, the screw rod is provided inside the housing, and the fixing plate is provided inside the housing.

[0012] Preferably, a front cover is slidably connected to one end of the furnace cavity, and a rear cover is slidably connected to the other end of the furnace cavity.

[0013] Preferably, the conveyor rails are arranged at equal intervals inside the boiler equipment, and the position of the grate corresponds one-to-one with the conveyor rails.

[0014] Preferably, the thermal insulation layer contains polyurethane, and the heat insulation layer contains metal foil.

[0015] Preferably, the cooling layer contains polystyrene, and the protective layer contains polypropylene.

[0016] Preferably, the motor and the screw rod form a rotating structure, and the fixing plate fixes the screw rod inside the housing.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This biomass boiler device, based on a dual-phase co-combustion system of stoker and chamber combustion, utilizes a cooling mechanism to rapidly reduce the heat generated during operation, preventing damage from overheating and extending the boiler's lifespan. A water pump draws cold water from the supply pipe, transmits it through the outlet pipe to the outlet column, and finally sprays it onto the boiler for cooling, improving cooling efficiency. A conveying mechanism facilitates the transport of biomass fuel, eliminating the need for manual addition and reducing labor intensity. A motor drives a screw rod to rotate inside the casing, transporting the biomass fuel. The screw rod is fixed by a fixing plate to prevent it from shifting during rotation, thus improving the stability of the conveying process. The front and rear covers facilitate cleaning of the furnace cavity, preventing blockages that could affect combustion efficiency. The sliding connection between the front and rear covers at both ends of the furnace cavity allows for easy disassembly, enhancing cleaning convenience. The conveyor rails and grate facilitate the transport and combustion of biomass fuel. The conveyor rails are evenly spaced inside the boiler, and the grate positions correspond one-to-one with the conveyor rails, ensuring uniform distribution of biomass fuel during combustion and improving combustion completeness. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the dual-fuel mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram of the cooling mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the solid feed inlet of the present invention used in conjunction with boiler equipment;

[0023] Figure 5 This is a schematic diagram of the conveying mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the protective layer structure of the present invention.

[0025] In the diagram: 1. Boiler equipment; 2. Protective layer; 21. Insulation layer; 22. Heat insulation layer; 23. Cooling layer; 24. Protective layer; 3. Protective shell; 4. Dual combustion mechanism; 41. Front cover; 42. Furnace cavity; 43. Rear cover; 44. Conveying rail; 45. Grate; 5. Cooling mechanism; 51. Water pump; 52. Water supply pipe; 53. Water outlet pipe; 54. Water outlet column; 55. Spray pipe; 6. Solid feed inlet; 7. Conveying mechanism; 71. Base plate; 72. Motor; 73. Outer shell; 74. Screw rod; 75. Fixing plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-6 The present invention provides a technical solution: a boiler device 1, the outer wall of the boiler device 1 is provided with a protective layer 2, the outer wall of the boiler device 1 is provided with a protective shell 3, the boiler device 1 is provided with a dual combustion mechanism 4, the outer wall of the boiler device 1 is provided with a cooling mechanism 5, the outer wall of the boiler device 1 is provided with a solid feed port 6, and the outer wall of the boiler device 1 is provided with a conveying mechanism 7.

[0028] The dual-combustion mechanism 4 includes a front cover 41, a furnace chamber 42, a rear cover 43, a conveyor rail 44, and a grate 45. The front cover 41 is installed inside the boiler equipment 1. The furnace chamber 42 is installed on the outer wall of the front cover 41. The rear cover 43 is installed inside the furnace chamber 42. The conveyor rail 44 is installed above the furnace chamber 42. The grate 45 is installed inside the conveyor rail 44.

[0029] The protective layer 2 includes a heat insulation layer 21, a heat insulation layer 22, a cooling layer 23 and a protective layer 24. The outer wall of the boiler equipment 1 is provided with a heat insulation layer 21, the outer wall of the heat insulation layer 21 is provided with a heat insulation layer 22, the outer wall of the heat insulation layer 22 is provided with a cooling layer 23, and the outer wall of the cooling layer 23 is provided with a protective layer 24.

[0030] The cooling mechanism 5 includes a water pump 51, a water supply pipe 52, a water outlet pipe 53, a water outlet column 54, and a spray pipe 55. The water pump 51 is installed on the outer wall of the boiler equipment 1. The water supply pipe 52 is installed at one end of the boiler equipment 1. The water outlet pipe 53 is installed at one end of the water pump 51. The water outlet column 54 is installed at one end of the water outlet pipe 53. The spray pipe 55 is installed on the outer wall of the water outlet column 54.

[0031] The spray pipes 55 are evenly distributed on the outer wall of the water outlet column 54, and the spray pipes 55 are symmetrically arranged about the central axis of the water outlet column 54.

[0032] The arrangement of the front cover 41, furnace chamber 42, rear cover 43, conveyor rail 44, and grate 45 allows the boiler to simultaneously perform stoker combustion and chamber combustion, improving combustion efficiency while reducing harmful gas emissions. Both the front cover 41 and rear cover 43 are slidably connected to both ends of the furnace chamber 42 via slide rails, facilitating the opening and closing of the furnace chamber 42 for fuel addition or cleaning. The conveyor rail 44 ensures that fuel is evenly and stably delivered to the grate 45, avoiding incomplete combustion caused by uneven fuel density. The position of the grate 45 corresponds one-to-one with the conveyor rail 44, ensuring that fuel accurately falls onto the grate 45 for stoker combustion.

[0033] By incorporating insulation layer 21, heat insulation layer 22, cooling layer 23, and protective layer 24, heat loss during boiler operation can be effectively reduced, improving energy efficiency. Insulation layer 21 contains polyurethane, providing excellent insulation performance and effectively slowing heat loss from the boiler. Heat insulation layer 22 contains metal foil, further enhancing insulation and preventing heat transfer through conduction. Cooling layer 23 contains polystyrene, offering excellent heat absorption and dissipation properties, quickly absorbing heat from the outer wall of boiler and dissipating it through water sprayed from spray pipe 55, effectively lowering the temperature of boiler. Protective layer 24 contains polypropylene, providing excellent corrosion resistance and wear resistance, effectively protecting boiler from environmental erosion and abrasion, extending its service life.

[0034] The water pump 51, water supply pipe 52, water outlet pipe 53, water outlet column 54, and spray pipe 55 are configured to cool the boiler equipment 1, preventing damage caused by prolonged high-temperature operation. After the water pump 51 starts, cooling water is delivered to the water outlet pipe 53 through the water supply pipe 52, and then evenly distributed to each spray pipe 55 through the water outlet column 54. The spray pipe 55 sprays water mist onto the outer wall of the boiler equipment 1, achieving rapid cooling.

[0035] Furthermore, the conveying mechanism 7 includes a base plate 71, a motor 72, a housing 73, a screw rod 74, and a fixing plate 75. The base plate 71 is mounted on the outer wall of the boiler equipment 1, and the motor 72 is installed on the base plate 71. The housing 73 is mounted on the outer wall of the base plate 71, and the screw rod 74 and fixing plate 75 are both located inside the housing 73. Through the arrangement of the base plate 71, motor 72, housing 73, screw rod 74, and fixing plate 75, fuel can be stably and continuously conveyed into the boiler equipment 1, ensuring continuous combustion. After the motor 72 starts, it drives the screw rod 74 to rotate inside the housing 73, thereby conveying fuel from one end to the other. The fixing plate 75 ensures that the screw rod 74 remains stable during rotation.

[0036] Furthermore, a front cover 41 is slidably connected to one end of the furnace cavity 42, and a rear cover 43 is slidably connected to the other end of the furnace cavity 42. The furnace cavity 42 is designed to form a closed combustion space, ensuring the stability and safety of the combustion process.

[0037] Furthermore, the conveyor rails 44 are evenly spaced inside the boiler equipment 1, and the position of the grate 45 corresponds one-to-one with the conveyor rails 44. The arrangement of the grate 45 ensures that the fuel can be evenly distributed during the stratification combustion stage, thereby improving combustion efficiency. The grate 45 is made of high-temperature and corrosion-resistant materials, which can withstand long-term operation in high-temperature combustion environments, while reducing equipment failures caused by corrosion.

[0038] Furthermore, polyurethane is added to the insulation layer 21, and metal foil is added to the heat insulation layer 22. The insulation layer 21 effectively reduces heat loss inside the boiler equipment, improving energy efficiency. The polyurethane material has a good closed-cell structure and low thermal conductivity, allowing the insulation layer 21 to maintain the internal temperature of the boiler equipment 1 while effectively preventing the intrusion of cold air from the outside, thus reducing heat loss.

[0039] Furthermore, the cooling layer 23 contains polystyrene, and the protective layer 24 contains polypropylene. The cooling layer 23 can quickly absorb and disperse the heat generated during the operation of the boiler equipment. Polystyrene material has high heat absorption and good heat dissipation performance.

[0040] Furthermore, the spray pipes 55 are evenly distributed on the outer wall of the water outlet column 54, and the spray pipes 55 are symmetrically arranged with respect to the central axis of the water outlet column 54. Through the arrangement of the spray pipes 55, water mist can be evenly sprayed onto the outer wall of the boiler equipment, ensuring the consistency of the cooling effect.

[0041] Furthermore, the motor 72 and the screw rod 74 form a rotating structure. The fixing plate 75 fixes the screw rod 74 inside the housing 73. The fixing plate 75 ensures that the screw rod 74 will not shake during rotation, thus maintaining the stability of the conveying.

[0042] Working Principle: In operation, biomass fuel is first added to the boiler equipment 1 through the solid feed inlet 6. The motor 72 is then started, driving the screw 74 to rotate inside the outer casing 73, thus transporting the fuel from one end to the other. The fuel is then evenly conveyed to the grate 45 via the conveyor rail 44. Simultaneously, the front cover 41 and rear cover 43 are slidably connected to both ends of the furnace chamber 42 via slide rails, facilitating the opening or closing of the furnace chamber 42 for fuel addition or cleaning as needed. The fuel on the grate 45 undergoes stoker combustion, and the high-temperature flue gas generated enters other combustion zones inside the boiler equipment 1 for chamber combustion, achieving dual-phase synergistic combustion of stoker and chamber combustion, improving combustion efficiency while reducing harmful gas emissions. During combustion, the high temperature generated by boiler equipment 1 is insulated and cooled by protective layer 2. Insulation layer 21 contains polyurethane, which has excellent insulation properties and effectively slows down heat loss from the boiler equipment 1. Insulation layer 22 contains metal foil, further enhancing the insulation effect. Cooling layer 23 contains polystyrene, which has excellent heat absorption and dissipation properties, quickly absorbing heat from the outer wall of boiler equipment 1. Protective layer 24 contains polypropylene, which has good corrosion resistance and wear resistance, protecting boiler equipment 1 from external environmental corrosion. Simultaneously, water pump 51 is started, delivering cooling water through water pipe 52 to water outlet pipe 53, and then evenly distributing it to various spray pipes 55 via water column 54. The spray pipes 55 spray water mist onto the outer wall of boiler equipment 1, achieving rapid cooling and preventing damage to boiler equipment 1 due to prolonged high-temperature operation. This biomass boiler device, based on dual-phase co-combustion of stoker and chamber combustion, has a reasonable structural design. By combining stoker and chamber combustion, it achieves efficient and environmentally friendly combustion, while also having good heat preservation, insulation and cooling performance, improving energy utilization efficiency and extending the service life of the boiler equipment.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion, comprising boiler equipment (1), characterized in that: The boiler equipment (1) is provided with a protective layer (2) on its outer side wall, a protective shell (3) on its outer side wall, a dual combustion mechanism (4) inside the boiler equipment (1), a cooling mechanism (5) on its outer side wall, a solid feed inlet (6) on its outer side wall, and a conveying mechanism (7) on its outer side wall. The dual-combustion mechanism (4) includes a front cover (41), a furnace cavity (42), a rear cover (43), a conveyor rail (44), and a grate (45). The boiler equipment (1) has a front cover (41) installed inside. The furnace cavity (42) is installed on the outer wall of the front cover (41). The rear cover (43) is installed inside the furnace cavity (42). The conveyor rail (44) is installed above the furnace cavity (42). The grate (45) is installed inside the conveyor rail (44). The protective layer (2) includes a heat insulation layer (21), a heat insulation layer (22), a cooling layer (23) and a protective layer (24). The outer wall of the boiler equipment (1) is provided with a heat insulation layer (21), the outer wall of the heat insulation layer (21) is provided with a heat insulation layer (22), the outer wall of the heat insulation layer (22) is provided with a cooling layer (23), and the outer wall of the cooling layer (23) is provided with a protective layer (24). The cooling mechanism (5) includes a water pump (51), a water supply pipe (52), a water outlet pipe (53), a water outlet column (54), and a spray pipe (55). The outer wall of the boiler equipment (1) is provided with a water pump (51), one end of the boiler equipment (1) is provided with a water supply pipe (52), one end of the water pump (51) is provided with a water outlet pipe (53), one end of the water outlet pipe (53) is provided with a water outlet column (54), and the outer wall of the water outlet column (54) is provided with a spray pipe (55). The spray pipes (55) are evenly distributed on the outer wall of the water outlet column (54), and the spray pipes (55) are symmetrically arranged with respect to the central axis of the water outlet column (54).

2. A biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion according to claim 1, characterized in that: The conveying mechanism (7) includes a base plate (71), a motor (72), a housing (73), a screw rod (74), and a fixing plate (75). The base plate (71) is provided on the outer wall of the boiler equipment (1). The motor (72) is installed on the base plate (71). The housing (73) is provided on the outer wall of the base plate (71). The screw rod (74) is provided inside the housing (73). The fixing plate (75) is provided inside the housing (73).

3. A biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion according to claim 1, characterized in that: A front cover (41) is slidably connected to one end of the furnace cavity (42), and a rear cover (43) is slidably connected to the other end of the furnace cavity (42).

4. A biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion according to claim 1, characterized in that: The conveying rails (44) are arranged at equal intervals inside the boiler equipment (1), and the position of the grate (45) corresponds one-to-one with the conveying rails (44).

5. A biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion according to claim 2, characterized in that: The insulation layer (21) contains polyurethane, and the heat insulation layer (22) contains metal foil.

6. A biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion according to claim 2, characterized in that: The cooling layer (23) contains polystyrene, and the protective layer (24) contains polypropylene.

7. A biomass boiler device based on dual-phase co-combustion of stoker combustion and chamber combustion according to claim 2, characterized in that: The motor (72) and the screw rod (74) form a rotating structure, and the fixing plate (75) fixes the screw rod (74) inside the outer shell (73).

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