Gas-solid dual combustion furnace system

Abstract

The utility model relates to combustion equipment technical field provides a kind of gas-solid dual combustion furnace system, and the system includes boiler body, biomass gasifier, biomass carbon conveying device and feeding device.The utility model provides gas-solid dual combustion furnace system, by being provided with gaseous combustion system with low-value fuel burner and solid combustion system with fire grate in boiler body;And setting biomass gasifier to pyrolysis gasification biomass fuel, make biomass fuel into biomass gas and biomass carbon;Biomass gas is guided into gaseous combustion system with low-value fuel burner and burns, and biomass carbon is conveyed to solid combustion system with fire grate and burns, realizes the gas-solid dual combustion of biomass fuel;Make biomass fuel can be combusted fully, and burnout rate is high, avoid energy waste, and ash solid waste is easier to handle, and investment and operating cost are low.

Description

Technical Field

[0001] This utility model relates to the field of combustion equipment technology, specifically to a gas-solid dual combustion furnace system. Background Technology

[0002] With the increasing global demand for renewable energy, traditional fossil fuels are facing depletion and causing serious environmental pollution. Biomass gasification technology, with its high efficiency, environmental friendliness, and renewable nature, has become an important development direction in my country's energy sector.

[0003] The development of biomass pellet fuel gasification technology has provided technical support for the emergence of straw gasification furnaces. This technology is an energy conversion process in which biomass pellet feedstock is heated and reacted under anaerobic conditions, enabling carbon and hydrogen elements to be converted into combustible gases such as carbon monoxide, methane, and hydrogen, thus realizing the effective utilization of straw energy.

[0004] To make full use of biomass energy, the current common practice is to use boilers to perform solid-state combustion of biomass. For example, biomass fuel can be solid-state burned in the furnace of a boiler; or, biomass can be converted into combustible gas in a gasifier and then transported to the boiler for gaseous combustion.

[0005] However, in the relevant combustion technologies, incomplete combustion and low burnout rate lead to environmental problems such as energy waste and difficulty in treating ash and solid waste. Moreover, the investment cost is high and the operating cost is high. Utility Model Content

[0006] In view of the above-mentioned defects in the prior art, the present invention provides a gas-solid dual combustion furnace system to solve at least one of the above-mentioned technical defects in the prior art, so that biomass fuel can be fully burned with a high combustion rate, avoiding energy waste, making ash and solid waste easier to handle, and with low investment and operating costs.

[0007] To achieve the objective of this utility model, the present utility model provides a gas-solid dual combustion furnace system, comprising:

[0008] The boiler body is equipped with a gaseous combustion system with a low-value fuel burner and a solid combustion system with a grate;

[0009] A biomass gasifier is suitable for pyrolyzing and gasifying biomass fuel to convert the biomass fuel into biomass gas and biomass carbon, and the biomass gas is transported to the low-value fuel burner.

[0010] A biomass carbon conveying device, connecting the biomass gasifier and the grate, is adapted to convey the biomass carbon to the grate;

[0011] The feeding device is connected to the biomass gasifier and is adapted to transport biomass fuel to the biomass gasifier.

[0012] Preferably, it also includes an induced draft fan, which is connected in series between the biomass gasifier and the low-value fuel burner.

[0013] Preferably, the feeding device includes a feeding hopper and a first screw conveyor.

[0014] One end of the first screw conveyor is connected to the feed hopper, and the other end of the first screw conveyor is connected to the biomass gasification furnace.

[0015] Preferably, the biomass carbon conveying device is equipped with a second screw conveyor.

[0016] One end of the second screw conveyor is connected to the biomass gasifier, and the other end of the second screw conveyor is connected to the grate.

[0017] Preferably, one end of the second screw conveyor is located at the bottom of the biomass gasification furnace, and the other end of the second screw conveyor is located above the grate.

[0018] Preferably, the grate is a reciprocating grate, and the reciprocating grate is provided with grate plates that move alternately.

[0019] Preferably, the reciprocating grate further includes a hydraulic drive device, a fixed grate beam, and a movable grate beam, wherein the fixed grate beam and the movable grate beam are alternately arranged.

[0020] The hydraulic drive device drives the reciprocating grate to reciprocate.

[0021] Preferably, it also includes a shearing device, which is disposed on the grate.

[0022] Preferably, the low-value fuel burner is provided with a porous spiral nozzle.

[0023] Preferably, it also includes a gas purification device.

[0024] The gas purification device is located between the induced draft fan and the low-value fuel burner.

[0025] The beneficial effects of this utility model are as follows: The gas-solid dual combustion furnace system provided by this utility model is achieved by setting a gaseous combustion system with a low-value fuel burner and a solid combustion system with a grate in the boiler body; and setting a biomass gasification furnace to pyrolyze and gasify biomass fuel, so that the biomass fuel is converted into biomass gas and biomass carbon; the biomass gas is introduced into the gaseous combustion system with the low-value fuel burner for combustion, and the biomass carbon is transported to the solid combustion system with a grate for combustion, thus realizing gas-solid dual combustion of biomass fuel; so that biomass fuel can be fully burned, with a high combustion rate, avoiding energy waste, and making ash and solid waste easier to handle, and with low investment and operating costs. Attached Figure Description

[0026] The above and other objects, features, and advantages of this utility model will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this application.

[0027] Figure 1 This is a schematic diagram of the overall structure of the gas-solid dual combustion furnace system provided in an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram showing the relationship between the biomass gasification furnace and the boiler body.

[0029] 100. Boiler body; 110. Gaseous combustion system; 111. Low-value fuel burner; 120. Solid combustion system; 121. Grate;

[0030] 200. Biomass gasifier; 210. Biomass gas; 220. Biomass carbon; 230. Exhaust fan;

[0031] 300. Biomass carbon conveying device; 310. Second screw conveyor;

[0032] 400. Feeding device; 410. Feeding hopper; 420. First screw conveyor;

[0033] 500. Chimney. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0035] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this applies. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] The following is combined Figure 1 and Figure 2 The embodiments of this utility model will be described below. It should be understood that the following description is merely an illustrative embodiment of this utility model and does not constitute any limitation on this utility model.

[0038] Combination Figure 1 and Figure 2 The embodiment of this utility model provides a gas-solid dual combustion furnace system including a boiler body 100, a biomass gasification furnace 200, a biomass carbon conveying device 300, and a feeding device 400.

[0039] The boiler body 100 is equipped with a gaseous combustion system 110 with a low-value fuel burner 111 and a solid combustion system 120 with a grate 121. The flue gas after combustion in the boiler body 100 can be discharged to the outside through the chimney 500.

[0040] The biomass gasifier 200 pyrolyzes and gasifies biomass fuel, converting it into biomass gas 210 and biomass carbon 220. The biomass gas 210 is then fed to the low-value fuel burner 111. The generated biomass gas 210 is a combustible gas. The biomass fuel in the biomass gasifier 200 reacts under oxygen-deficient conditions, converting carbon and hydrogen into combustible gases such as carbon monoxide, methane, and hydrogen, enabling the efficient utilization of straw (i.e., biomass fuel) energy. After combustion, the biomass gas 210 is converted into saturated steam, exhibiting high combustion efficiency.

[0041] The biomass carbon conveying device 300 connects the biomass gasifier 200 and the grate 121, and can convey the biomass carbon 220 to the grate 121; so that the biomass carbon 220 can be burned by the solid combustion system 120 in the boiler body 100, and the combustion efficiency is further improved.

[0042] The feeding device 400 is connected to the biomass gasifier 200, which can transport biomass fuel to the biomass gasifier 200, thereby increasing the feeding efficiency of biomass fuel and further improving the combustion efficiency.

[0043] It is understood that the gas-solid dual combustion furnace system provided in the embodiments of this utility model achieves gas-solid dual combustion of biomass fuel by setting a gaseous combustion system 110 with a low-value fuel burner 111 and a solid combustion system 120 with a grate 121 in the boiler body 100; and setting a biomass gasification furnace 200 to pyrolyze and gasify biomass fuel, so that the biomass fuel is converted into biomass gas 210 and biomass carbon 220; the biomass gas 210 is introduced into the gaseous combustion system 110 with the low-value fuel burner 111 for combustion, and the biomass carbon 220 is transported to the solid combustion system 120 with the grate 121 for combustion; thus, the biomass fuel can be fully burned with a high burnout rate, avoiding energy waste, and the ash and solid waste is easier to handle, and the investment and operating costs are low.

[0044] Specifically, in some embodiments of this utility model, the system further includes an induced draft fan 230, which is connected in series with the biomass gasifier 200 and the low-value fuel burner 111; so that the biomass gas in the biomass gasifier 200 can be better transported to the gaseous combustion system 110 at the low-value fuel burner 111 for combustion.

[0045] Of course, the induced draft fan 230 can be connected in series with the biomass gasifier 200 and the low-value fuel burner 111 through a gas pipeline. The first end of the gas pipeline is connected to the top of the biomass gasifier 200, and the second end of the gas pipeline is connected to the low-value fuel burner 111. The induced draft fan 230 is installed on the gas pipeline.

[0046] In addition, in some embodiments of this utility model, the feeding device 400 includes a feeding hopper 410 and a first screw conveyor 420.

[0047] One end of the first screw conveyor 420 is connected to the feed hopper 410, and the other end of the first screw conveyor 420 is connected to the biomass gasifier 200; this makes the structure of the gas-solid dual combustion furnace system simpler and the feeding operation more efficient. Biomass fuel can be placed at the feed hopper 410 and transported to the biomass gasifier 200 by the first screw conveyor 420.

[0048] In some embodiments of this utility model, the biomass carbon conveying device 300 is provided with a second screw conveyor 310.

[0049] One end of the second screw conveyor 310 is connected to the biomass gasifier 200, and the other end of the second screw conveyor 310 is connected to the grate 121; so that the biomass carbon 220 obtained after the biomass fuel is pyrolyzed and gasified in the biomass gasifier 200 can be transported from the biomass gasifier 200 to the grate 121 via the second screw conveyor 310 and burned by the solid combustion system 120. The structure is simpler and the combustion operation is more convenient.

[0050] Furthermore, combined Figure 1 In some embodiments of this utility model, one end of the second screw conveyor 310 is located at the bottom of the biomass gasifier 200, and the other end of the second screw conveyor 310 is located above the grate 121, so that the biomass carbon 220 deposited in the biomass gasifier 200 can be more conveniently and completely transported to the grate 121, thereby further improving the combustion rate.

[0051] In addition, combined Figure 1 In some embodiments of this utility model, the grate 121 is a reciprocating grate, which is provided with alternating grate plates, further enabling the biomass carbon 220 to be more completely delivered to the solid combustion system 120 in the boiler body 100 for complete combustion.

[0052] Specifically, in order to simplify the structure of the grate 121, in some embodiments of this utility model, the reciprocating grate 121 further includes a hydraulic drive device, a fixed grate beam and a movable grate beam, with the fixed grate beam and the movable grate being alternately arranged, and the hydraulic drive device driving the reciprocating grate to move back and forth; moreover, the grate 121 can also be a horizontal structure.

[0053] Combination Figure 1 In some embodiments of this utility model, the gas-solid dual combustion furnace system further includes a shearing device, which is disposed on the grate 121.

[0054] The shearing device can break up clumps of biomass fuel, which can further improve combustion efficiency, and also has the advantages of low metal consumption and strong fuel adaptability.

[0055] Furthermore, combined Figure 1 In some embodiments of this utility model, the low-value fuel burner 111 is provided with a porous spiral nozzle, which can better improve the combustion efficiency of biomass gas.

[0056] Combination Figure 1 In some embodiments of this utility model, the gas-solid dual combustion furnace system further includes a gas purification device.

[0057] The gas purification device is installed between the induced draft fan 230 and the low-value fuel burner 111; it can remove tar and dust from biomass gas, thereby improving the combustion rate and making the combustion more complete.

[0058] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the use of terms such as "preferred embodiment," "another embodiment," "some embodiments," "other embodiments," or "specific example," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A gas-solid dual combustion furnace system, characterized in that, include: The boiler body is equipped with a gaseous combustion system with a low-value fuel burner and a solid combustion system with a grate; A biomass gasifier is suitable for pyrolyzing and gasifying biomass fuel to convert the biomass fuel into biomass gas and biomass carbon, and the biomass gas is transported to the low-value fuel burner. A biomass carbon conveying device, connecting the biomass gasifier and the grate, is adapted to convey the biomass carbon to the grate; The feeding device is connected to the biomass gasifier and is adapted to transport biomass fuel to the biomass gasifier.

2. The gas-solid dual combustion furnace system as described in claim 1, characterized in that, It also includes an induced draft fan, which is connected in series with the biomass gasifier and the low-value fuel burner.

3. The gas-solid dual combustion furnace system as described in claim 1, characterized in that, The feeding device includes a feeding hopper and a first screw conveyor. One end of the first screw conveyor is connected to the feed hopper, and the other end of the first screw conveyor is connected to the biomass gasification furnace.

4. The gas-solid dual combustion furnace system as described in claim 3, characterized in that, The biomass carbon conveying device is equipped with a second screw conveyor. One end of the second screw conveyor is connected to the biomass gasifier, and the other end of the second screw conveyor is connected to the grate.

5. The gas-solid dual combustion furnace system as described in claim 4, characterized in that, One end of the second screw conveyor is located at the bottom of the biomass gasification furnace, and the other end of the second screw conveyor is located above the grate.

6. The gas-solid dual combustion furnace system as described in claim 1, characterized in that, The grate is a reciprocating grate, and the reciprocating grate is provided with grate plates that move alternately.

7. The gas-solid dual combustion furnace system as described in claim 6, characterized in that, The reciprocating grate also includes a hydraulic drive device, fixed grate beams, and movable grate beams, which are alternately arranged. The hydraulic drive device drives the reciprocating grate to reciprocate.

8. The gas-solid dual combustion furnace system as described in claim 7, characterized in that, It also includes a shearing device, which is disposed on the grate.

9. The gas-solid dual combustion furnace system as described in claim 1, characterized in that, The low-value fuel burner is equipped with a porous spiral nozzle.

10. The gas-solid dual combustion furnace system as described in claim 2, characterized in that, It also includes gas purification devices, The gas purification device is located between the induced draft fan and the low-value fuel burner.

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