Biomass combustion furnace and biomass combustion system

Abstract

The utility model provides a biomass combustion furnace and biomass combustion system relates to biomass combustion technical field, the biomass combustion furnace includes the furnace body, heating pipe, exhaust port, flame projector and valve body, be equipped with the cylindrical furnace chamber in the furnace body, it is equipped with a plurality of groups of heating pipe, the heating pipe passes through the furnace chamber setting, there is the gap between adjacent heating pipe, and the valve body is equipped with the valve body. The two ends, located outside the furnace body, of the heating pipe are provided with a feeding port and a slag discharging port respectively, the exhaust port is connected with the heating pipe, the heating pipe is arranged in the furnace body, the multiple sets of flamethrowers are arranged, the flamethrowers are arranged around the heating pipe, the heating pipe is evenly heated in the circumferential direction, and each flamethrower is provided with a plurality of fire spraying nozzles. And the flame nozzles are arranged in the axial direction of the heating pipe to uniformly heat the heating pipe in the axial direction, so that the problems of non-uniform heating and insufficient combustion in the traditional biomass combustion are solved.

Description

Technical Field

[0001] This utility model relates to the field of biomass combustion technology, and in particular to a biomass combustion furnace and a biomass combustion system. Background Technology

[0002] In the production of methanol from biomass, rotary kilns or internal combustion furnaces are commonly used to burn biomass. Biomass produces syngas through combustion, and the syngas is used to synthesize methanol in a reactor. During the high-temperature combustion of biomass in the rotary kiln or internal combustion furnace, the irregular shape of biomass leads to uneven heating and incomplete combustion. This application is proposed to address the above-mentioned defects. Utility Model Content

[0003] The purpose of this invention is to provide a biomass combustion furnace and biomass combustion system, which solves the problems of uneven heating and incomplete combustion that exist in the current stage of using rotary kilns or internal combustion furnaces for biomass combustion.

[0004] To address the aforementioned problems, this utility model provides a biomass combustion furnace, comprising a furnace body, heating tubes, an exhaust port, burners, and valve bodies. The furnace body contains a cylindrical furnace cavity. Several groups of heating tubes, such as 1 to 5 groups, are arranged, all passing through the furnace cavity. Gaps exist between adjacent heating tubes to facilitate uniform heating by the burners. Feed inlets and slag discharge outlets are respectively located at the two ends of each heating tube outside the furnace body. Valve bodies are installed at both the feed inlets and slag discharge outlets to control feeding and slag discharge. The exhaust port is connected to the heating tubes. Several groups of burners, such as 2 to 6 groups, are arranged around the heating tubes to provide uniform heating in the circumference. Each burner is equipped with several nozzles arranged along the axial direction of the heating tube. This arrangement solves the problems of uneven heating and incomplete combustion in traditional biomass combustion.

[0005] According to one embodiment of the present invention, the furnace body includes an inner support layer and an outer heat insulation layer, which achieve the effect of heat preservation and insulation.

[0006] According to one embodiment of the present invention, the exhaust port is connected to the lower side of the feed port.

[0007] According to one embodiment of the present invention, the number of flamethrowers is greater than the number of heating tubes, thereby achieving a more uniform heating and more complete combustion effect.

[0008] According to one embodiment of the present invention, the furnace body has a cylindrical structure.

[0009] According to one embodiment of the present invention, the portion of the heating tube located in the furnace cavity is a straight tube or a tube with a curved structure, and the curved structure may be wavy.

[0010] A biomass combustion system includes the aforementioned biomass combustion furnace, syngas storage tank, and fuel tank, wherein the syngas storage tank is connected to an exhaust port, and the fuel tank is connected to a flamethrower.

[0011] According to one embodiment of the present invention, the biomass combustion system further includes an ash storage tank, which is used to receive the ash discharged from the ash discharge port.

[0012] According to one embodiment of the present invention, the furnace body is arranged vertically or inclined, such that the height of the feed inlet of the heating tube is higher than the height of the slag discharge outlet.

[0013] The beneficial effects of this utility model are that by setting a heating tube in the furnace body and setting several sets of burners, the burners are arranged around the heating tube to form uniform heating of the heating tube in the circumference. Each burner is equipped with several nozzles, which are arranged along the axial direction of the heating tube to form uniform heating of the heating tube in the axial direction. The heating speed is faster and the heating uniformity can be guaranteed, which solves the problems of uneven heating and incomplete combustion in traditional biomass combustion. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of a biomass combustion furnace;

[0016] Figure 2 This is a cross-sectional structural diagram of a biomass combustion furnace;

[0017] Figure 3 This is a schematic diagram of the composition and structure of a biomass combustion system. Detailed Implementation

[0018] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0019] A biomass combustion furnace, such as Figure 1 , Figure 2 It includes furnace body 1, heating tube 2, exhaust port 23, flamethrower 3 and valve body 102.

[0020] The furnace body 1 is preferably a cylindrical structure, and can be optionally configured as a square or polygonal structure. The furnace body 1 includes an inner support layer 12 and an outer heat insulation layer 11, which have the effect of heat preservation. The inner support layer 12 can be made of high-temperature resistant materials, such as metal, ceramics and other conventional furnace body materials. The outer heat insulation layer 11 can be provided with high-temperature heat insulation coating, lightweight heat insulation castable and other heat insulation layers used in existing combustion furnaces. The heat insulation layer is used to ensure that the heat in the combustion furnace is completely used for heating the heating tubes.

[0021] The furnace body 1 is provided with a cylindrical furnace cavity, and the heating tubes 2 are provided in several groups, such as 1 to 5 groups, depending on the requirements and the volume of the furnace body 1. The heating tubes 2 are all installed through the furnace cavity. The heating tubes 2 can be connected by welding or flanges or other detachable methods. The part of the heating tube 2 located in the furnace cavity can be a straight tube or a tube with a curved structure. The curved structure can be corrugated. When a tube with a curved structure is used, it has a larger heating area and a larger capacity.

[0022] Optionally, the end panels of the furnace body 1 are detachable, allowing for adaptation to different needs by replacing the panels with heating tube mounting holes of different numbers, diameters, or positions.

[0023] like Figure 2 There is a gap between adjacent heating tubes 2 to facilitate the burner to heat the heating tubes 2 evenly. The heating tubes 2 are provided with a feed port 21 and a slag discharge port 22 at both ends outside the furnace body 1. A valve body 102 is provided at both the feed port 21 and the slag discharge port 22. The valve body 102 is used to control the feeding and slag discharge. The valve body 102 can be a mechanical valve body or an electromagnetic valve body. The exhaust port 23 is connected to the heating tube 2 and is connected to the lower side of the feed port 21.

[0024] The flamethrowers 3 are arranged in several groups, such as 2 to 6 groups, and are arranged around the heating tube 2 to form uniform heating of the heating tube 2 in the circumference. Preferably, the number of flamethrowers 3 is greater than the number of heating tubes 2. The flamethrowers 3 include those that directly heat the heating tube 2 and those that heat the gap between adjacent heating tubes 2, so as to achieve further uniform heating and complete combustion. Each flamethrower 3 is equipped with several nozzles, which are arranged along the axial direction of the heating tube 2. Through the above arrangement, the problems of uneven heating and incomplete combustion in traditional biomass combustion are solved.

[0025] The biomass raw material is inside the heating tube 2, which enters the heating tube through the feed inlet 21. The biomass needs to be pre-treated to be powdered or granular. The syngas after the biomass is burned is discharged through the exhaust port 23. After the biomass is completely burned, the ash is discharged into the ash storage tank through the ash discharge port 22. The diameter of the heating tube 2 is much smaller than the outer diameter of the combustion furnace, which can withstand greater pressure and will not explode. Large combustion furnaces have the risk of explosion. Compared with the integrated combustion furnace, which heats the furnace body from the outside, this solution uses multiple heating tubes 2, which has a faster heating speed and can better ensure uniform heating. In contrast, the internal combustion furnace cannot control the combustion process of the internal biomass, resulting in incomplete combustion due to the stratification of the upper and lower layers.

[0026] A biomass combustion system includes the aforementioned biomass combustion furnace 101, syngas storage tank 104, fuel tank 105, and ash storage tank 106. The syngas storage tank 104 is connected to the exhaust port 23, the fuel tank 105 is connected to the burner 3, the fuel in the fuel tank 105 enters the burner 3 through the fuel delivery pipe for combustion, the syngas enters the syngas storage tank 104 through the syngas delivery pipe 103, and the ash storage tank 106 is used to receive the ash discharged from the ash discharge port 22.

[0027] Optionally, the furnace body 1 can be arranged vertically or inclined, so that the height of the feed inlet 21 of the heating tube 2 is higher than the height of the slag discharge port 22, which facilitates slag discharge. When a horizontal arrangement is adopted, slag can be discharged by setting a spiral slag discharge mechanism in the heating tube 2.

[0028] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations and modifications.

Claims

1. A biomass combustion furnace, characterized in that: The furnace includes a furnace body (1), heating tubes (2), exhaust ports (23), flamers (3), and valve bodies (102). The furnace body (1) has a cylindrical furnace cavity. Several sets of heating tubes (2) are provided. The heating tubes (2) all pass through the furnace cavity. There is a gap between adjacent heating tubes (2). The two ends of the heating tubes (2) located outside the furnace body (1) are respectively provided with feed inlets (21) and slag discharge ports (22). Valve bodies (102) are provided at both feed inlets (21) and slag discharge ports (22). The exhaust ports (23) are connected to the heating tubes (2). Several sets of flamers (3) are provided and arranged around the heating tubes (2). Each flamer (3) is provided with several nozzles. The nozzles are arranged along the axial direction of the heating tubes (2).

2. The biomass combustion furnace according to claim 1, characterized in that: The furnace body (1) includes an inner support layer (12) and an outer heat insulation layer (11).

3. The biomass combustion furnace according to claim 1, characterized in that: The exhaust port (23) is connected to the lower side of the feed port (21).

4. The biomass combustion furnace according to any one of claims 1-3, characterized in that: The number of flamethrowers (3) is greater than the number of heating tubes (2).

5. The biomass combustion furnace according to claim 1, characterized in that: The furnace body (1) has a cylindrical structure.

6. The biomass combustion furnace according to claim 4, characterized in that: The portion of the heating tube (2) located in the furnace cavity is a straight tube or a tube with a curved structure.

7. A biomass combustion system, characterized in that: It includes a biomass combustion furnace (101), a syngas storage tank (104), and a fuel tank (105) as described in any one of claims 1-6, wherein the syngas storage tank (104) is connected to an exhaust port (23) and the fuel tank (105) is connected to a flamethrower (3).

8. The biomass combustion system according to claim 7, characterized in that: The biomass combustion system also includes an ash storage tank (106) for receiving ash discharged from the ash discharge port (22).

9. The biomass combustion system according to claim 7 or 8, characterized in that: The furnace body (1) is arranged vertically, so that the height of the feed inlet (21) of the heating tube (2) is higher than the height of the slag discharge port (22).

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