Combustor for livestock manure fuel

Abstract

The present invention relates to a combustion device that generates heat by burning livestock manure fuel in powder form with a moisture content of 15% or more to 25% or less. More specifically, the invention relates to a combustion device for livestock manure fuel that allows primary combustion to occur in a lower combustion space where the loaded livestock manure fuel is located, using air introduced from the air discharge pipe and heat and flame introduced from the ignition burner. When self-combustion begins in the lower combustion space, the operation of the ignition burner is stopped, and the flame and volatile gas generated in the lower combustion space are guided through the flame guide pipe to an upper combustion space, which is the upper part of the main body, to allow secondary combustion to occur, thereby enabling continuous combustion using only livestock manure fuel.

Description

Technology Field

[0001] The present invention relates to a combustion device that generates heat by burning livestock manure fuel in powder form with a moisture content of 15% or more to 25% or less. More specifically, the invention relates to a combustion device for livestock manure fuel that allows primary combustion to occur in a lower combustion space where the loaded livestock manure fuel is located, using air introduced from the air discharge pipe and heat and flame introduced from the ignition burner. When self-combustion begins in the lower combustion space, the operation of the ignition burner is stopped, and the flame and volatile gas generated in the lower combustion space are guided through the flame guide pipe to an upper combustion space, which is the upper part of the main body, to allow secondary combustion to occur, thereby enabling continuous combustion using only livestock manure fuel. Background Technology

[0002] Generally, large quantities of livestock manure, such as cow, pig, and chicken manure, are generated daily in livestock barns and ranches.

[0003] Livestock manure generated in large quantities from barns or pastures was stored in large retention tanks equipped at livestock farms and then disposed of by discharging it into streams or rivers, or by dumping it into the ocean.

[0004] Due to environmental concerns, the discharge of livestock manure into streams and rivers or the dumping of it into the ocean is currently prohibited. Instead, the manure is dried using drying devices and recycled into natural compost or as raw material for thermal power plants.

[0005] Conventional livestock manure drying devices dry livestock manure using a heater while the manure is stored in a manure storage tank, so the energy consumption required for drying is excessive, which has the problem of being uneconomical.

[0006] In particular, when recycling livestock manure as a raw material for power plants, it must be dried to a moisture content of 25% or less. However, conventional drying devices have limitations in drying livestock manure to a moisture content of 25% or less, and there was a problem that a large amount of time and energy was consumed in drying the manure to a moisture content of 25% or less.

[0007] To solve these problems, the following are disclosed: a carbonization combustion device for livestock manure (Korean Registered Patent Publication No. 10-2591019), a livestock manure pellet stove (Korean Registered Patent Publication No. 10-2880234), a boiler with improved heating efficiency through the spiral movement of a flame (Korean Registered Patent Publication No. 10-1352777), a wood-burning boiler (Korean Registered Patent Publication No. 10-1094472), and a wood-burning boiler (Korean Registered Patent Publication No. 10-1821184).

[0008] The above-mentioned Korean Registered Patent Publication No. 10-2591019, a carbonization combustion device for livestock manure, is configured to continuously supply fuel; the above-mentioned livestock manure pellet stove, No. 10-2880234, is configured to be divided into a main combustion chamber and an auxiliary combustion chamber; the boiler with improved heating efficiency through spiral movement of the flame, No. 10-1352777, is configured to guide the flame in a spiral manner; the wood-burning boiler, No. 10-1094472, is configured to achieve complete combustion by re-burning combustion gases in the combustible chamber using a plate-shaped flame guide plate; and the wood-burning boiler, No. 10-1821184, is disclosed to be configured to partition the combustion chamber into a fire chamber and a combustible chamber.

[0009] However, these conventional technologies have the problem of poor economic efficiency due to the continuous injection of direct fuel, or difficulty in continuous operation due to a configuration that merely separates the combustion chamber and the firebox to enable re-combustion. Prior art literature

[0010] Korean Registered Patent Publication No. 10-2591019 (Published October 17, 2023) Korean Registered Patent Publication No. 10-2880234 (Published November 3, 2025) Korean Registered Patent Publication No. 10-1352777 (Published January 16, 2014) Korean Registered Patent Publication No. 10-1094472 (Published December 19, 2011) The problem to be solved

[0011] The present invention aims to solve the above-mentioned problems by providing a combustion device for livestock manure fuel that allows for continuous combustion using only livestock manure fuel, by first allowing primary combustion to occur in a lower combustion space where the loaded livestock manure fuel is located using air introduced from the air exhaust pipe and heat and flame introduced from the ignition burner, and when self-combustion begins in the lower combustion space, stopping the operation of the ignition burner and guiding the flame and volatile gas generated in the lower combustion space to the upper combustion space, which is the upper part of the main body, through the flame guide pipe to allow secondary combustion to occur.

[0012] In addition, another objective of the present invention is to provide a livestock manure fuel combustor that uses only pure livestock manure fuel and can be applied to boilers, generators, heat exchangers, etc. means of solving the problem

[0013] The features of the present invention for achieving the above objectives are,

[0014] A combustion device for generating heat by burning livestock manure fuel comprises: a main body formed in a vertical shape so that the livestock manure fuel is loaded and burned inside; at least one air exhaust pipe connected to an external blower and arranged so as to face from the lower part to the upper part of the main body; and at least one flame guide pipe connected to an external ignition burner and arranged so as to face from the central part to the upper part of the main body, wherein, initially, primary combustion is performed in a lower combustion space where the loaded livestock manure fuel is located using air introduced from the air exhaust pipe and heat and flame introduced from the ignition burner, and when self-combustion begins in the lower combustion space, the operation of the ignition burner is stopped, and the flame and volatile gas generated in the lower combustion space are guided through the flame guide pipe to an upper combustion space, which is the upper part of the main body, so as to perform secondary combustion, thereby enabling continuous combustion using only the livestock manure fuel.

[0015] Here, the above-mentioned livestock manure fuel is in powder form and has a moisture content of 15% or more to 25% or less.

[0016] In addition, the main body has a fuel supply port formed at the top for introducing livestock manure fuel, so that the livestock manure fuel that is introduced and falls passes through the upper combustion space, is partially carbonized, is loaded into the lower combustion space, and then combusted.

[0017] Here, the air exhaust pipe has a plurality of air exhaust holes formed to discharge air.

[0018] In addition, the air exhaust pipe is formed lower than the height of the loaded manure fuel to introduce air into the manure fuel loaded in the lower combustion space.

[0019] In addition, the flame guide tube has a length such that its lower end is inserted into the livestock manure fuel loaded in the lower combustion space, and its upper end extends to the upper combustion space.

[0020] In addition, the upper end of the flame guide tube is bent to prevent the falling fuel from entering.

[0021] In addition, the flame guide tube above allows the flame and volatile gases generated in the lower combustion space to flow in and rise due to the pressure difference.

[0022] In addition, the main body is provided with a discharge port on its bottom surface for discharging ash, and a means for opening and closing the discharge port is provided. Effects of the invention

[0023] According to the livestock manure fuel combustor of the present invention configured as described above, energy can be saved by continuously burning the livestock manure fuel with the heat and flame generated by burning only the livestock manure fuel during the remaining process, excluding the initial combustion of the livestock manure fuel, thereby generating heat.

[0024] In addition, according to the present invention, a combustion device that uses only pure livestock manure fuel can be applied to boilers, generators, heat exchangers, etc. Brief explanation of the drawing

[0025] FIG. 1 is a cross-sectional view showing the configuration of a livestock manure fuel combustor according to the present invention. FIG. 2 is a side cross-sectional view showing the configuration of a livestock manure fuel combustor according to the present invention. FIG. 3 is an operation diagram illustrating the initial combustion process of a livestock manure fuel combustor according to the present invention. FIG. 4 is an operation diagram illustrating the continuous combustion process of a livestock manure fuel combustor according to the present invention. Specific details for implementing the invention

[0026] Hereinafter, the configuration of a livestock manure fuel combustor according to the present invention will be described in detail with reference to the attached drawings.

[0027] In the following description of the present invention, specific descriptions of related known functions or configurations will be omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined in consideration of their functions within the present invention, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification.

[0028] FIG. 1 is a front cross-sectional view showing the configuration of a livestock manure fuel combustor according to the present invention, and FIG. 2 is a side cross-sectional view showing the configuration of a livestock manure fuel combustor according to the present invention.

[0029] Referring to FIGS. 1 and 2, the livestock manure fuel combustor (1) according to the present invention is composed of a main body (10), a blower (20), an air discharge pipe (30), an ignition burner (40), and a flame guide pipe (50).

[0030] First, the main body (10) is formed in the shape of a vertical housing so that livestock manure fuel (F) is loaded inside, primary combustion takes place in the lower combustion space (BCS) by means of a flame guide tube (50), and secondary combustion takes place in the upper combustion space (TCS), and a fuel supply port (11) is formed so that livestock manure fuel (F) is supplied through the top.

[0031] At this time, the livestock manure fuel (F) is in powder form and preferably has a moisture content of 15% or more to 25% or less. If the moisture content is less than 15%, drying time is long, energy consumption increases, and efficiency decreases. If the moisture content exceeds 25%, combustion takes a long time, and there is a problem of reduced calorific value.

[0032] Additionally, the manure fuel (F) that is fed into and falls through the fuel supply port (11) of the main body (10) passes through the upper combustion space (TCS), is partially carbonized, and is then loaded into the lower combustion space (BCS) and burned.

[0033] The main body (10) is provided with an outlet (13) for discharging ash on the bottom surface, and an opening / closing means (15) is provided at the outlet (13). At this time, it is preferable that the opening / closing means (15) has a structure that rotates around an axis.

[0034] And, the blower (20) is installed on the outside of the main body (10) and supplies outside air into the main body (10) through an air inlet pipe (21) installed at the bottom of the main body (10). At this time, it is preferable that the flow rate of the blower (20) be adjusted according to the amount of livestock manure fuel (F) supplied through the fuel supply port (11) of the main body (10).

[0035] Next, the air exhaust pipe (30) is combined with the air inlet pipe (21) to introduce air into the interior so that the livestock manure fuel (F) loaded in the lower combustion space (BCS) of the main body (10) is burned, and at least one is arranged so as to face from the lower part to the upper part of the main body (10), and the outside air introduced through the air inlet pipe (21) by the blower (20) is discharged into the lower combustion space (BCS).

[0036] It is preferable that the air exhaust pipe (30) has a plurality of air exhaust holes (31) formed to discharge air, and is formed lower than the height of the loaded manure fuel (F) to allow air to flow into the manure fuel (F) loaded in the lower combustion space (BCS).

[0037] Furthermore, the ignition burner (40) is installed on the outside of the main body (10) and emits flames through a flame tube (41) installed vertically in the center of the main body (10). At this time, it is preferable that the flame tube (41) has a flame outlet (43) in the form of a vertical tube so that a flame guide tube (50) can be inserted and installed at the top.

[0038] And, at least one flame guide tube (50) is installed in the flame tube (41) so as to be directed from the central part of the main body (10) toward the upper part, and it is preferable that the lower end is inserted into the livestock manure fuel (F) loaded in the lower combustion space (BCS) and the upper end has a length that extends to the upper combustion space (TCS), and a pressure difference is formed due to the temperature difference between the lower combustion space (BCS) and the upper combustion space (TCS), and due to this pressure difference, the flame and volatile gas generated in the lower combustion space (BCS) are introduced into the interior and guided to the upper combustion space (TCS).

[0039] It is preferable that the upper end of the flame guide tube (50) be bent so that the fuel (F) falling inside is not introduced.

[0040] Hereinafter, the configuration of a livestock manure fuel combustor according to the present invention will be described in detail with reference to the attached drawings.

[0041] FIG. 3 is an operational diagram illustrating the initial combustion process of a livestock manure fuel combustor according to the present invention, and FIG. 4 is an operational diagram illustrating the continuous combustion process of a livestock manure fuel combustor according to the present invention.

[0042] First, livestock manure fuel (F) is introduced through the fuel supply port (11) of the main body (10) to load the livestock manure fuel (F) to a certain height in the lower combustion space (BCS), which is the lower part of the main body (10).

[0043] When loading is completed up to a certain height, the blower (30) and ignition burner (40) are activated.

[0044] The ignition burner (40) is activated, and flames and heat are discharged into the flame tube (41) and transferred to the flame guide tube (50) installed in the flame tube (41).

[0045] Then, the flame is heated by the heat and flame of the flame guide tube (50) and simultaneously discharged through the upper part. At this time, the flame is directly discharged through the lower part of the flame outlet (43) of the flame tube (41).

[0046] As a result, the portion of the livestock manure fuel (F) loaded in the lower combustion space (BCS) that is in direct contact with the flame guide tube (50) is carbonized (flameless combustion) by heat, and volatile gases are generated, and primary combustion is carried out by the flame discharged through the lower part of the flame outlet (43) of the flame tube (41). In addition, carbonization (flameless combustion) occurs in the livestock manure fuel (F) loaded in the lower combustion space (BCS) by heat generated internally, and volatile gases are generated.

[0047] Then, as the combustion of the manure fuel (F) takes place in the flame guide tube (50), a cavity is generated, and the volatile gas and flame collected in this cavity are guided along the flame guide tube (50) to the upper combustion space (TCS), where secondary combustion takes place. At this time, the manure fuel (F) is supplied in a constant manner through the fuel supply port (11) of the main body (10), and as the manure fuel (F) passes through the upper combustion space (TCS), it is partially dried and carbonized, then loaded into the lower combustion space (BCS) and burned.

[0048] Meanwhile, when the self-combustion of the manure fuel (F) begins in the lower combustion space (BCS), the ignition burner (40) is turned off.

[0049] Even when the ignition burner (40) is turned off, the manure fuel (F) is continuously and consistently supplied, so self-combustion occurs in the lower combustion space (BCS), and as a result, volatile gas and flames are continuously generated, and the generated volatile gas and flames are guided to the upper combustion space (TCS) along the flame guide tube (50), so that secondary combustion occurs continuously in the upper combustion space (TCS) as well.

[0050] And, the heat from the main body (10) is exhausted to the outside and used as a heat source for a boiler, generator, heat exchanger, etc.

[0051] Meanwhile, the ash generated from the complete combustion of livestock manure fuel (F) in the main body (10) is discharged downward by an opening / closing means (15) provided in the discharge port (13) at regular intervals.

[0052] Accordingly, according to the present invention, livestock manure fuel can be utilized by drying and pulverizing it without separately producing it in pellet form, and the combustion space can be divided into upper and lower sections using a flame guide tube so that combustion occurs individually in each section to obtain the desired heat output of the combustion device, and the carbonization and combustion time can be shortened by partially carbonizing the input livestock manure fuel in the upper combustion space and then burning it in the lower combustion space.

[0053] In addition, according to the present invention, the livestock manure fuel is burned using an ignition burner only initially, and once the combustion of the livestock manure fuel itself begins, continuous combustion can be performed solely by the input of the livestock manure fuel.

[0054] The present invention may be modified in various ways and may take various forms, and the detailed description of the invention has described only specific embodiments thereof. However, it should be understood that the present invention is not limited to the specific forms mentioned in the detailed description, but rather should be understood to include all variations, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Explanation of the symbols

[0055] 10: Main body 11: Fuel supply port 13: Outlet 15: Opening / closing means 20: Blower 30: Air exhaust pipe 40: Ignition burner 50: Flame guide tube F: Livestock manure fuel BCS: Lower combustion space TCS: Upper combustion space

Claims

Claim 1 A combustor for generating heat by burning livestock manure fuel, wherein the combustor comprises: a main body formed in a vertical shape so that the livestock manure fuel is loaded and burned inside; at least one air exhaust pipe connected to an external blower and arranged so as to face from the lower part to the upper part of the main body; and at least one flame guide pipe connected to an external ignition burner and arranged so as to face from the central part to the upper part of the main body, wherein, initially, primary combustion is performed in a lower combustion space where the loaded livestock manure fuel is located using air introduced from the air exhaust pipe and heat and flame introduced from the ignition burner, and when self-combustion begins in the lower combustion space, the operation of the ignition burner is stopped, and the flame and volatile gas generated in the lower combustion space are guided through the flame guide pipe to an upper combustion space, which is the upper part of the main body, so as to perform secondary combustion, thereby enabling continuous combustion using only the livestock manure fuel. Claim 2 A combustor for livestock manure fuel according to claim 1, characterized in that the livestock manure fuel is in powder form and has a moisture content of 15% or more and 25% or less. Claim 3 A combustor for livestock manure fuel according to claim 1, wherein the main body has a fuel supply port formed at the upper end for introducing livestock manure fuel, so that the livestock manure fuel introduced and falling passes through the upper combustion space, is partially carbonized, is loaded into the lower combustion space, and then combusted. Claim 4 A livestock manure fuel combustor according to claim 1, wherein the air exhaust pipe is characterized by having a plurality of air exhaust holes formed to discharge air. Claim 5 A combustor for livestock manure fuel according to claim 1, characterized in that the air exhaust pipe is formed lower than the height of the loaded livestock manure fuel to introduce air into the livestock manure fuel loaded in the lower combustion space. Claim 6 A combustor for livestock manure fuel according to claim 1, characterized in that the flame guide tube has a length such that its lower end is inserted into the livestock manure fuel loaded in the lower combustion space, and its upper end extends to the upper combustion space. Claim 7 A combustor for livestock manure fuel according to claim 1, characterized in that the upper end of the flame guide tube is bent so that livestock manure fuel falling inside is not introduced. Claim 8 A combustor for livestock manure fuel according to claim 1, characterized in that the flame guide tube allows flames and volatile gases generated in the lower combustion space to be introduced and rise due to a pressure difference. Claim 9 A livestock manure fuel burner according to claim 1, characterized in that the main body is provided with an outlet for discharging ash on the bottom surface and an opening and closing means is provided on the outlet.

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