Biomass Briquette and Small Square Bale Hybrid Reverse Fire and Reverse Layer-by-Layer Combustion Device

Abstract

The biomass briquette and small square bale mixed reverse fire and reverse layer-by-layer combustion device belongs to the field of boiler combustion systems. The present invention includes a hot water suction pipe, a makeup water heating pipe, a left furnace body, a middle furnace body, and a right furnace body. The left furnace body, the middle furnace body, and the right furnace body are connected and installed from left to right. The hot water suction pipe is installed in a circulating manner inside the left furnace body, the middle furnace body, and the right furnace body. The hot water suction pipe is connected to the makeup water heating pipe. A biomass briquette feed inlet and a biomass small square bale feed inlet are respectively arranged on the outer sides of the left furnace body and the right furnace body. The inside of the middle furnace body is the main combustion chamber. The research and development purpose of the present invention is to solve the problems that the biomass energy fuel of traditional biomass boilers is single, the use method is not flexible enough, and it is impossible to make reasonable planning and adjustment according to the actual situation. A makeup water heating pipe is installed inside the middle furnace body, and the makeup water heating pipe is connected and installed with the external boiler heating return water. The structure of the present invention is simple and ingenious, and it is suitable for popularization and use.

Description

Technical Field

[0001] The present invention relates to a biomass briquette and small square bale hybrid reverse fire reverse layer combustion device, belonging to the field of boiler combustion systems. Background Art

[0002] Biomass boilers are a type of boiler, that is, boilers using biomass energy as fuel are called biomass boilers, which are divided into biomass steam boilers, biomass hot water boilers, biomass hot air furnaces, biomass heat transfer oil furnaces, vertical biomass boilers, horizontal biomass boilers, etc. The biomass energy used for combustion in biomass boilers is usually biomass briquettes and biomass small square bales. Biomass briquettes are made by pressing biomass raw materials such as biomass sawdust, corn, wheat, rice, beans, peanuts, sweet potatoes, and branch firewood with a moisture content of 15-25% and less than 50 mm into rod-shaped solid particle biofuels with a cross-sectional size of 33-40 mm and a length greater than 15 cm through special equipment. Biomass small square bales are made by sorting and packing straw into small square bales for convenient transportation and combustion. The above traditional biomass boiler fuels are single, and only one of biomass briquettes or biomass small square bales can be selected as the biomass combustion energy. The fuel thermal efficiency is low. Due to the seasonal factor that the straw yield is large in autumn and low in other seasons, the traditional biomass boiler usage method is not flexible enough and cannot make reasonable planning adjustments according to the actual situation.

[0003] Therefore, there is an urgent need to propose a biomass briquette and small square bale hybrid reverse fire reverse layer combustion device to solve the above technical problems. Summary of the Invention

[0004] The research and development purpose of the present invention is to solve the problems that the biomass energy fuel of traditional biomass boilers is single, the usage method is not flexible enough, and reasonable planning adjustments cannot be made according to the actual situation. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0005] Technical Solution of the Present Invention:

[0006] A biomass briquette and small square bale hybrid reverse fire reverse layer combustion device, comprising a hot water suction pipe, a water replenishment and heating pipe, a left furnace body, a middle furnace body, and a right furnace body. The left furnace body, the middle furnace body, and the right furnace body are respectively connected and installed from left to right. The hot water suction pipe is circularly arranged and installed inside the left furnace body, the middle furnace body, and the right furnace body. The hot water suction pipe is communicated with the water replenishment and heating pipe. Biomass briquette inlets and biomass small square bale inlets are respectively arranged on the outer sides of the left furnace body and the right furnace body. The inside of the middle furnace body is the main combustion chamber. A water replenishment and heating pipe is installed inside the middle furnace body, and the water replenishment and heating pipe is connected and installed with the external boiler heating return water.

[0007] Preferably, a primary air inlet and a secondary air inlet are machined on the left furnace body and the right furnace body, and a tertiary air inlet is machined at the bottom of the middle furnace body.

[0008] Preferably, an air heating pipe is installed at the upper part of the middle furnace body, and the outlet air of the air heating pipe is respectively communicated with the air ducts of the primary air inlet, the secondary air inlet and the tertiary air inlet.

[0009] Preferably, electric control valves are respectively arranged on the primary air inlet, the secondary air inlet and the tertiary air inlet.

[0010] Preferably, the air heating pipe is arranged at the upper end of the water replenishing and heating pipe, and the air duct is arranged at the lower end of the hot water suction pipe.

[0011] Preferably, it further includes a manual switch door, an electric slide gate and a conveyor belt. The manual switch door is installed at the biomass briquette feeding port, the electric slide gate is installed at the biomass small square bale feeding port, and the conveyor belt is installed at the feeding port of the biomass small square bale feeding port.

[0012] Preferably, inspection doors are respectively arranged on the left furnace body, the middle furnace body and the right furnace body.

[0013] Preferably, ash cleaning doors are respectively arranged at the bottoms of the left furnace body, the middle furnace body and the right furnace body.

[0014] Preferably, it further includes an induced draft fan, and the top of the middle furnace body is connected and installed with the induced draft fan through a flue gas pipeline.

[0015] Preferably, a dust removal device is arranged on the flue gas pipeline.

[0016] The present invention aims to solve the problem of different biomass fuel feeding methods under different conditions, and its technical solution is as follows:

[0017] A biomass briquette and small square bale hybrid reverse fire and reverse layer combustion device, including a hot water suction pipe, a water replenishing and heating pipe, a left furnace body, a middle furnace body and a right furnace body. The left furnace body, the middle furnace body and the right furnace body are respectively connected and installed from left to right. The hot water suction pipe is circularly arranged and installed inside the left furnace body, the middle furnace body and the right furnace body, and the hot water suction pipe is communicated with the water replenishing and heating pipe. Biomass briquette feeding ports and biomass small square bale feeding ports are respectively arranged on the outer sides of the left furnace body and the right furnace body. The inside of the middle furnace body is a main combustion chamber, and a water replenishing and heating pipe is installed inside the middle furnace body. The water replenishing and heating pipe is connected and installed with the return water of the external boiler for heat supply.

[0018] Preferably, it further includes a manual switch door, an electric slide gate and a conveyor belt. The manual switch door is installed at the biomass briquette feeding port, the electric slide gate is installed at the biomass small square bale feeding port, and the conveyor belt is installed at the feeding port of the biomass small square bale feeding port.

[0019] The present invention has the following beneficial effects:

[0020] 1. In the biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device of the present invention, the biomass briquette and the biomass small square bale are used in combination, effectively improving the utilization rate of the mixture of the biomass briquette and the biomass small square bale;

[0021] 2. In the biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device of the present invention, the selection and planning of biomass fuels are more flexible, cost is saved, and the concept of green and sustainable development of biomass boilers is met;

[0022] 3. In the biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device of the present invention, the reverse fire and reverse layer-by-layer combustion enables the biomass fuel to burn more fully. The flue gas generated by the combustion of the biomass fuel is reused, ensuring that the water entering the hot water suction pipe during device water replenishment has a temperature, thereby improving the combustion efficiency.

[0023] 4. The biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device of the present invention has a simple structure, ingenious design, and low cost, and is suitable for popularization and use. Description of the Drawings

[0024] Figure 1 is a structural diagram of the biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device;

[0025] Figure 2 is a three-dimensional structural schematic diagram of the biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device;

[0026] Figure 3 is a structural layout schematic diagram of the hot water suction pipe and the water replenishment heating pipe;

[0027] Figure 4 is a structural layout schematic diagram of the air heating pipe;

[0028] Figure 5 is a structural schematic diagram of the hot water suction pipe;

[0029] In the figure, 1 - manual switch door, 2 - primary air inlet, 3 - electric slide gate, 4 - conveyor belt, 5 - hot water suction pipe, 6 - water replenishment heating pipe, 7 - secondary air inlet, 8 - inspection door, 9 - ash cleaning door, 10 - flue gas pipe, 11 - air heating pipe, 12 - induced draft fan, 13 - main combustion chamber, 14 - tertiary air inlet, 151 - left furnace body, 152 - middle furnace body, 153 - right furnace body, 16 - dust removal equipment, 17 - air duct, 18 - heat supply outlet pipe, 111 - biomass briquette inlet, 112 - biomass small square bale inlet. Detailed Embodiments

[0030] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0031] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection is an inseparable connection, including but not limited to conventional fixed connection methods such as hemming connection, rivet connection, bonding connection and welding connection. The detachable connection includes but not limited to conventional disassembly methods such as screw connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is defaulted that at least one connection method can always be found among the existing connection methods to achieve this function, and those skilled in the art can select according to their needs. For example: welding connection is selected for the fixed connection, and hinge connection is selected for the detachable connection.

[0032] Specific Embodiment 1: In combination with Figure 1 - Figure 2 This embodiment is described. The biomass briquette and small square bale hybrid reverse fire and reverse layer combustion device of this embodiment includes a hot water suction pipe 5, a water replenishment and heating pipe 6, a left furnace body 151, a middle furnace body 152 and a right furnace body 153. The left furnace body 151, the middle furnace body 152 and the right furnace body 153 are connected and installed in communication from left to right. The hot water suction pipe 5 is arranged and installed in a circulating manner inside the left furnace body 151, the middle furnace body 152 and the right furnace body 153. The hot water suction pipe 5 is communicated with the water replenishment and heating pipe 6. Biomass briquette inlets 111 and biomass small square bale inlets 112 are respectively arranged on the outer sides of the left furnace body 151 and the right furnace body 153. The main combustion chamber 13 is arranged inside the middle furnace body 152. The water replenishment and heating pipe 6 is installed inside the middle furnace body 152. The water replenishment and heating pipe 6 is connected and installed in communication with the return water of the external boiler for heat supply. The air heating pipes are arranged and installed in layers inside the left furnace body, the middle furnace body and the right furnace body;

[0033] The left furnace body 151 and the right furnace body 153 are processed with a primary air inlet 2 and a secondary air inlet 7, and the bottom of the middle furnace body 152 is processed with a tertiary air inlet 14. An air heating pipe 11 is installed on the upper part of the middle furnace body 152. Air ducts 17 are respectively arranged on the primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14, and the air ducts 17 lead to the interiors of the left furnace body 151, the middle furnace body 152 and the right furnace body 153. The outlet air of the air heating pipe 11 is respectively communicated with the air ducts 17 arranged on the primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14. Electric control valves are respectively arranged on the primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14. The air heating pipe 11 is arranged at the upper end of the water replenishing and heating pipe 6, and the air duct 17 is arranged at the lower end of the hot water suction pipe 5. The hot water suction pipe 5 and the water replenishing and heating pipe 6 are respectively communicated with the heat supply outlet pipe 18. The water in the hot water suction pipe 5 and the water replenishing and heating pipe 6 is heated and then converges into the heat supply pipe network. The primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14 transport preheated air into the left furnace body, the middle furnace body and the right furnace body, and the purpose is to assist combustion.

[0034] The primary air inlet 2 and the air heating pipe 11 communicated therewith constitute the first heating layer, the secondary air inlet 7 and the air heating pipe 11 communicated therewith constitute the second heating layer, and the tertiary air inlet 14 and the air heating pipe 11 communicated therewith constitute the third heating layer. The biomass briquette is filled into the device through the biomass briquette inlet 111 and ignited in the first heating layer. The combustion flame of the biomass briquette is downward, igniting the biomass small square package to form semi-gasification. The flame, gasification products and flue gas continue to go downward, and the combustion temperature in the main combustion chamber 13 reaches the highest at this time.

[0035] The electric control valve adjusts the flow rate of air entering the air heating pipe 11.

[0036] The water replenishing and heating pipe 6 is arranged at the upper end of the first heating layer, and the hot water suction pipe 5 is circularly arranged between the first heating layer, the second heating layer and the third heating layer. The water in the hot water suction pipe 5 is heat-exchanged layer by layer, and the boiler water supply continuously enters the hot water suction pipe 5 through the water replenishing and heating pipe 6 for circulating heating.

[0037] Specific Embodiment 2: Combining Figure 1 - Figure 2 Describe this embodiment. The biomass briquette and small square package hybrid reverse-fire and reverse-layer combustion device of this embodiment further includes a manual switch door 1, an electric slide gate 3 and a conveyor belt 4. A manual switch door 1 is installed on the biomass briquette inlet 111, an electric slide gate 3 is installed on the biomass small square package inlet 112, and a conveyor belt 4 is installed at the inlet of the biomass small square package inlet 112. The manual switch door 1 facilitates manual feeding, and the biomass small square package enters the device through the biomass small square package inlet 112 by using the conveyor belt 4 for combustion.

[0038] Specific Embodiment 3: CombiningFigure 1 - Figure 2 Regarding this embodiment, for the biomass briquette and small square bale hybrid reverse fire and reverse layer combustion device of this embodiment, inspection doors 8 are respectively arranged on the left furnace body 151, the middle furnace body 152 and the right furnace body 153. The inspection doors 8 facilitate the internal inspection of the device at any time, making the inspection and maintenance more convenient.

[0039] Specific Embodiment Four: Combining Figure 1 - Figure 2 Regarding this embodiment, for the biomass briquette and small square bale hybrid reverse fire and reverse layer combustion device of this embodiment, ash cleaning doors 9 are respectively arranged at the bottoms of the left furnace body 151, the middle furnace body 152 and the right furnace body 153. The substances generated after the combustion of biomass briquettes and biomass small square bales are removed from the device through the ash cleaning doors 9.

[0040] Specific Embodiment Five: Combining Figure 1 - Figure 2 Regarding this embodiment, for the biomass briquette and small square bale hybrid reverse fire and reverse layer combustion device of this embodiment, it further includes an induced draft fan 12. The top of the middle furnace body 152 is connected and installed with the induced draft fan 12 through a flue gas pipeline 10. The induced draft fan 12 provides an upward power for the flue gas inside the device, facilitating the later flue gas treatment and recovery.

[0041] Specific Embodiment Six: Combining Figure 1 - Figure 2 Regarding this embodiment, based on Embodiment Five, for the biomass briquette and small square bale hybrid reverse fire and reverse layer combustion device of this embodiment, a dust removal device 16 is arranged on the flue gas pipeline 10. The dust removal device 16 prevents the smoke particles generated during combustion in the device from blocking the pipeline and improves the service life of the induced draft fan 12.

[0042] Specific Embodiment Seven: Combining Figure 1 - Figure 4 Regarding this embodiment, for the biomass briquette and small square bale hybrid reverse fire and reverse layer combustion device of this embodiment, using the traction force of the induced draft fan, the gas inside the device is sucked upward and discharged. Its working steps are as follows:

[0043] Step a, manually fill the biomass briquette into the device through the biomass briquette inlet 111 and ignite it;

[0044] Step b, use the conveyor belt 4 to send the biomass small square bale into the device;

[0045] Step c, the combustion flame of the biomass briquette burns downward to ignite the biomass small square bale to form semi-gasification. The flame, gasification products and flue gas continue to go downward. At this time, the combustion temperature in the main combustion chamber 13 is the highest. At this time, the heat is transferred to the water in the hot water absorption pipe 5. The water exchanges heat with the air in the air heating pipe 11 and the high-temperature flue gas inside the device. After the flue gas inside the device is absorbed layer by layer by temperature, it is discharged out of the furnace through the induced draft fan 12;

[0046] Step d: After being preheated by the air heating pipe 11, the air enters the air duct 17 connected to the primary air inlet 2, the secondary air inlet 7, and the tertiary air inlet 14. The air duct 17 sends the air into the first heating layer, the second heating layer, and the third heating layer for combustion support.

[0047] Step e: The water in the water replenishing and heating pipe 6 is preheated by the flue gas and then enters the hot water suction pipe 5. Finally, it converges at the heat supply outlet pipe 18 and flows into the heat supply pipe network.

[0048] It should be noted that in the above embodiments, as long as the technical solutions do not conflict, they can be arranged and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, the present invention will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0049] This embodiment is only an exemplary illustration of this patent and does not limit its protection scope. Those skilled in the art can also make partial changes to it. As long as they do not exceed the spirit of this patent, they are within the protection scope of this patent.

Claims

1. Biomass briquette and small square bale mixed reverse fire and reverse layer-by-layer combustion device, characterized in that: It includes a hot water suction pipe (5), a water replenishing and heating pipe (6), a left furnace body (151), a middle furnace body (152) and a right furnace body (153). The left furnace body (151), the middle furnace body (152) and the right furnace body (153) are connected and installed from left to right. The hot water suction pipe (5) is arranged in a circulating manner inside the left furnace body (151), the middle furnace body (152) and the right furnace body (153). The hot water suction pipe (5) is communicated with the water replenishing and heating pipe (6). Biomass briquette feeding ports (111) and biomass small square package feeding ports (112) are respectively arranged on the outer sides of the left furnace body (151) and the right furnace body (153). The inside of the middle furnace body (152) is a main combustion chamber (13). The water replenishing and heating pipe (6) is installed inside the middle furnace body (152), and the water replenishing and heating pipe (6) is connected and installed with the return water of the external boiler for heat supply. Primary air inlets (2) and secondary air inlets (7) are processed on the left furnace body (151) and the right furnace body (153), and a tertiary air inlet (14) is processed at the bottom of the middle furnace body (152). An air heating pipe (11) is installed at the upper part of the middle furnace body (152), and the induced air of the air heating pipe (11) is respectively communicated with air ducts (17) arranged on the primary air inlet (2), the secondary air inlet (7) and the tertiary air inlet (14). A biomass briquette and small square package hybrid reverse fire and layer-by-layer combustion device uses the traction force of an induced draft fan to suck and extract the gas in the device upward. The working steps are as follows: Step a, manually fill the biomass briquette into the device from the biomass briquette feeding port (111) and ignite it. Step b, use a conveyor belt (4) to send the biomass small square package into the device. Step c, the combustion flame of the biomass briquette burns downward to ignite the biomass small square package to form semi-gasification. The flame, gasification products and flue gas continue to go downward. At this time, the combustion temperature in the main combustion chamber (13) is the highest. At this time, the heat is transferred to the water in the hot water suction pipe (5). The water exchanges heat with the air in the air heating pipe (11) and the high-temperature flue gas in the device. After the flue gas in the device is absorbed layer by layer by temperature, it is discharged outside the furnace through the induced draft fan (12). Step d, the air is preheated by the air heating pipe (11) and then enters the air ducts (17) connected to the primary air inlet (2), the secondary air inlet (7) and the tertiary air inlet (14). The air ducts (17) send the air into the first heating layer, the second heating layer and the third heating layer for combustion support. Step e, the water in the water replenishing and heating pipe (6) enters the hot water suction pipe (5) after being preheated by the flue gas, and finally converges at the heat supply outlet pipe (18) and flows into the heat supply pipe network.

2. The biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device according to claim 1, characterized in that: Electric control valves are respectively arranged on the primary air inlet (2), the secondary air inlet (7) and the tertiary air inlet (14).

3. The biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device according to claim 2, wherein: The air heating pipe (11) is arranged at the upper end of the water replenishing and heating pipe (6), and the air duct (17) is arranged at the lower end of the hot water suction pipe (5).

4. The biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device according to claim 1, characterized in that: It also includes a manual switch door (1), an electric plug door (3) and a conveyor belt (4). A manual switch door (1) is installed on the biomass briquette inlet (111), an electric plug door (3) is installed on the biomass small square bale inlet (112), and a conveyor belt (4) is installed at the inlet of the biomass small square bale inlet (112).

5. The biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device according to claim 1, characterized in that: Maintenance doors (8) are respectively arranged on the left furnace body (151), the middle furnace body (152) and the right furnace body (153).

6. The biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device according to claim 1, characterized in that: Ash cleaning doors (9) are respectively arranged at the bottoms of the left furnace body (151), the middle furnace body (152) and the right furnace body (153).

7. The biomass briquette and small square bale hybrid reverse fire and reverse layer-by-layer combustion device according to claim 1, characterized in that: It also includes an induced draft fan (12). The top of the middle furnace body (152) is connected and installed with the induced draft fan (12) through a flue gas pipeline (10).

8. The biomass briquette and small square bale mixed reverse fire and reverse layer-by-layer combustion device according to claim 7, characterized in that: A dust removal device (16) is arranged on the flue gas pipeline (10).

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