CN111578263A - Reverse layer-by-layer combustion device for mixed backfire of biomass briquette and small square ladle - Google Patents

Reverse layer-by-layer combustion device for mixed backfire of biomass briquette and small square ladle Download PDF

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Publication number
CN111578263A
CN111578263A CN202010573687.3A CN202010573687A CN111578263A CN 111578263 A CN111578263 A CN 111578263A CN 202010573687 A CN202010573687 A CN 202010573687A CN 111578263 A CN111578263 A CN 111578263A
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CN
China
Prior art keywords
furnace body
layer
backfire
biomass
small square
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Pending
Application number
CN202010573687.3A
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Chinese (zh)
Inventor
张春满
刘立涛
刘丽丽
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Heilongjiang Huare Energy Co ltd
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Heilongjiang Huare Energy Co ltd
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Priority to CN202010573687.3A priority Critical patent/CN111578263A/en
Publication of CN111578263A publication Critical patent/CN111578263A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

Reverse successive layer burner of backfire is mixed with little square ladle to living beings briquetting belongs to boiler combustion system field. The biomass energy-saving biomass boiler comprises a heat absorption water pipe, a water replenishing heating pipe, a left side furnace body, a middle furnace body and a right side furnace body, wherein the left side furnace body, the middle furnace body and the right side furnace body are respectively communicated and installed from left to right, the heat absorption water pipe is circularly arranged inside the left side furnace body, the middle furnace body and the right side furnace body and is communicated with the water replenishing heating pipe, a biomass pressing block feeding port and a biomass small square bag feeding port are respectively arranged on the outer sides of the left side furnace body and the right side furnace body, and a main combustion chamber is arranged inside the middle furnace body. The invention has simple structure and ingenious design and is suitable for popularization and use.

Description

Reverse layer-by-layer combustion device for mixed backfire of biomass briquette and small square ladle
Technical Field
The invention relates to a reverse backfire layer-by-layer combustion device for mixing biomass briquettes and small square ladles, and belongs to the field of boiler combustion systems.
Background
The biomass boiler is a kind of boiler, namely a boiler taking biomass energy as fuel is called as a biomass boiler and is divided into a biomass steam boiler, a biomass hot water boiler, a biomass hot air furnace, a biomass heat-conducting oil furnace, a vertical biomass boiler, a horizontal biomass boiler and the like, the biomass energy used for the combustion of the biomass boiler is generally biomass briquettes and biomass small square bales, the biomass briquettes are rod-shaped solid particle biofuels with the water content of 15-25% below 50 mm, such as biomass sawdust, corn, wheat, rice, beans, peanuts, yams, trees and the like, the cross-section size of which is 33-40 mm and the length of which is more than 15 cm, the biomass small square bales are prepared by arranging straws into small square bales through special equipment, the transportation and the combustion are convenient, the fuel of the traditional biomass boiler is single, only one of the biomass briquettes or the biomass small square bales can be selected as, the fuel thermal efficiency is low, and because the yield of the straw in autumn is large, and the yield of the straw in other seasons is low, the traditional biomass boiler is not flexible in use mode, and can not be reasonably planned and adjusted according to actual conditions.
Therefore, there is a need to provide a reverse layer-by-layer combustion device for backfire of biomass briquettes and small square ladles, so as to solve the above technical problems.
Disclosure of Invention
The invention has been developed to solve the problems of single fuel, inflexible usage and no rationality for planning and adjusting the fuel according to practical situations in the conventional biomass energy boiler, and a brief summary of the invention is provided below to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
biomass briquetting mixes reverse successive layer burner of backfire with little square ladle, including the heat absorption water pipe, the moisturizing heating pipe, the left side furnace body, middle part furnace body and right side furnace body communicate the installation respectively from a left side to the right side, the left side furnace body, the inside circulation of middle part furnace body and right side furnace body arranges and installs the heat absorption water pipe, heat absorption water pipe and moisturizing heating pipe intercommunication, the outside of left side furnace body and right side furnace body is provided with biomass briquetting pan feeding mouth and living beings little square ladle pan feeding mouth respectively, inside the setting of middle part furnace body is main combustion chamber, install the moisturizing heating pipe in the furnace body of middle part.
Preferably: the left furnace body and the right furnace body are provided with a primary air inlet and a secondary air inlet, and the bottom of the middle furnace body is provided with a tertiary air inlet.
Preferably: and the upper part of the middle furnace body is provided with an air heating pipe, and the outlet air of the air heating pipe is respectively communicated with the air pipes of the primary air inlet, the secondary air inlet and the tertiary air inlet.
Preferably: and the primary air inlet, the secondary air inlet and the tertiary air inlet are respectively provided with an electric regulating valve.
Preferably: the air heating pipe is arranged at the upper end of the water replenishing heating pipe, and the air pipe is arranged at the lower end of the heat absorption water pipe.
Preferably: still include manual switch door, electronic picture peg door and conveyer belt, install manual switch door on the living beings briquetting pan feeding mouth, install electronic picture peg door on the living beings cube package pan feeding mouth, the pan feeding mouth department of living beings cube package pan feeding mouth installs the conveyer belt.
Preferably: and the left furnace body, the middle furnace body and the right furnace body are respectively provided with an access door.
Preferably: and ash removing doors are respectively arranged at the bottoms of the left furnace body, the middle furnace body and the right furnace body.
Preferably: still include the draught fan, the middle part furnace body top is through flue gas pipeline and draught fan intercommunication installation.
Preferably: and the flue gas pipeline is provided with dust removal equipment.
In order to solve the problem that biomass fuel feeding modes are different under different conditions, the invention adopts the technical scheme that:
biomass briquetting mixes reverse successive layer burner of backfire with little square ladle, including the heat absorption water pipe, the moisturizing heating pipe, the left side furnace body, middle part furnace body and right side furnace body communicate the installation respectively from a left side to the right side, the left side furnace body, the inside circulation of middle part furnace body and right side furnace body arranges and installs the heat absorption water pipe, heat absorption water pipe and moisturizing heating pipe intercommunication, the outside of left side furnace body and right side furnace body is provided with biomass briquetting pan feeding mouth and living beings little square ladle pan feeding mouth respectively, inside the setting of middle part furnace body is main combustion chamber, install the moisturizing heating pipe in the furnace body of middle part.
Preferably: still include manual switch door, electronic picture peg door and conveyer belt, install manual switch door on the living beings briquetting pan feeding mouth, install electronic picture peg door on the living beings cube package pan feeding mouth, the pan feeding mouth department of living beings cube package pan feeding mouth installs the conveyer belt.
The invention has the following beneficial effects:
1. according to the device for the reverse layer-by-layer combustion of the mixed backfire of the biomass briquette and the small square ladle, the biomass briquette and the small square ladle are mixed for use, so that the mixing utilization rate of the biomass briquette and the small square ladle is effectively improved;
2. according to the reverse layer-by-layer combustion device with the mixed backfire of the biomass briquette and the small square ladle, the selection and planning of biomass fuel are more flexible, the cost is saved, and the concept of green sustainable development of a biomass boiler is met;
3. according to the reverse-fire reverse-layer-by-layer combustion device for mixing the biomass briquettes and the small square bales, the reverse-fire reverse-layer-by-layer combustion enables the biomass fuel to be more fully combusted, smoke generated by the combustion of the biomass fuel is secondarily utilized, the temperature of a water belt entering a heat absorption water pipe when the device is replenished with water is guaranteed, and the combustion efficiency is improved.
4. The reverse backfire layer-by-layer combustion device with the biomass briquette and the small square ladle mixed has the advantages of simple structure, ingenious design and low cost, and is suitable for popularization and use.
Drawings
FIG. 1 is a structural diagram of a biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device;
FIG. 2 is a schematic perspective view of a reverse layer-by-layer combustion device for mixed backfire of a biomass briquette and a small square ladle;
FIG. 3 is a schematic view of the structural arrangement of the heat absorption water pipe and the water replenishing heating pipe;
FIG. 4 is a schematic view of a structural arrangement of an air heating pipe;
FIG. 5 is a schematic structural view of a heat absorbing water pipe;
in the figure, 1-a manual door opening and closing, 2-a primary air pipe matched electric regulating valve, 3-an electric inserting plate door, 4-a conveyor belt, 5-a heat absorption water pipe, 6-a water replenishing heating pipe, 7-a secondary air matched electric regulating valve, 8-an access door, 9-an ash cleaning door, 10-a flue gas pipeline, 11-an air heating pipe, 12-an induced draft fan, 13-a main combustion chamber, 14-a tertiary air matched electric regulating valve, 151-a left side furnace body, 152-a middle furnace body, 153-a right side furnace body, 16-a dust removing device, 17-an air pipe, 18-a heat supply water outlet pipe, 111-a biomass briquette feeding port and 112-a biomass cube bag feeding port.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and includes but is not limited to folding edge connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection includes but is not limited to threaded connection, snap connection, pin connection, hinge connection and other conventional detachment modes, when the specific connection mode is not clearly limited, at least one connection mode can be found in the existing connection modes by default to realize the function, and the skilled person can select according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.
The first embodiment is as follows: the embodiment is described with reference to fig. 1-2, and the biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device of the embodiment comprises a heat absorption water pipe 5, a water replenishing heating pipe 6, a left furnace body 151, a middle furnace body 152, a right furnace body 153, a left furnace body 151, the middle furnace body 152 and the right furnace body 153 are respectively installed in a communicated manner from left to right, heat absorption water pipes 5 are circularly arranged inside the left furnace body 151, the middle furnace body 152 and the right furnace body 153, the heat absorption water pipes 5 are communicated with water replenishing heating pipes 6, a biomass briquette feeding port 111 and a biomass cube wrapping feeding port 112 are respectively arranged on the outer sides of the left furnace body 151 and the right furnace body 153, a main combustion chamber 13 is arranged inside the middle furnace body 152, the water replenishing heating pipes 6 are installed in a communicated manner with external boiler heat supply return water, and air heating pipes are installed inside the left furnace body, the middle furnace body and;
the left furnace body 151 and the right furnace body 153 are provided with a primary air inlet 2 and a secondary air inlet 7, the bottom of the middle furnace body 152 is provided with a tertiary air inlet 14, the upper part of the middle furnace body 152 is provided with an air heating pipe 11, the primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14 are respectively provided with an air pipe 17, the air pipes 17 are communicated with the insides of the left furnace body 151, the middle furnace body 152 and the right furnace body 153, the air led out of the air heating pipe 11 is respectively communicated with the primary air inlet 2, the secondary air inlet 7 and the air pipes 17 arranged on the tertiary air inlet 14, the primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14 are respectively provided with an electric regulating valve, the air heating pipe 11 is arranged at the upper end of a water replenishing heating pipe 6, the air pipe 17 is arranged at the, water in the heat absorption water pipe 5 and the water replenishing heating pipe 6 is heated and then converged into a heat supply pipe network; the primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14 convey preheated air into the left furnace body, the middle furnace body and the right furnace body for the purpose of supporting combustion
The primary air pipe is matched with the electric regulating valve 2 and the air heating pipe 11 communicated with the same to form a first heating layer, the secondary air is matched with the electric regulating valve 7 and the air heating pipe 11 communicated with the same to form a second heating layer, the tertiary air is matched with the electric regulating valve 14 and the air heating pipe 11 communicated with the same to form a third heating layer, a biomass briquette is filled into the device through a biomass briquette feeding port 111 and is ignited in the first heating layer, the combustion flame of the biomass briquette is downward, a biomass cube is ignited to form semi-gasification, the flame, gasification products and flue gas continue downward, and the combustion temperature of the main combustion chamber 13 reaches the highest at the moment;
the electric regulating valve regulates the flow of air entering the air heating pipe 11;
moisturizing heating pipe 6 arranges in first layer zone of heating upper end, and heat absorption water pipe 5 circulation is arranged between first layer zone of heating, second floor zone of heating and third layer zone of heating, and the water successive layer in the heat absorption water pipe 5 carries out the heat transfer, and boiler water supply constantly gets into heat absorption water pipe 5 through moisturizing heating pipe 6 and carries out circulation heating.
The second embodiment is as follows: the embodiment is described by combining fig. 1-2, the reverse layer-by-layer combustion device with the mixed backfire of the biomass briquette and the small square bag of the embodiment further comprises a manual switch door 1, an electric inserting plate door 3 and a conveyor belt 4, the manual switch door 1 is installed on the biomass briquette feeding port 111, the electric inserting plate door 3 is installed on the biomass small square bag feeding port 112, the conveyor belt 4 is installed at the feeding port of the biomass small square bag feeding port 112, the manual switch door 1 facilitates manual feeding, and the biomass small square bag utilizes the conveyor belt 4 to enter the device through the biomass small square bag feeding port 112 for combustion.
The third concrete implementation mode: the embodiment is described by combining fig. 1-2, the biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device of the embodiment is provided with the access doors 8 on the left furnace body 151, the middle furnace body 152 and the right furnace body 153 respectively, and the access doors 8 are convenient for overhauling the inside of the device at any time, so that the inspection and the maintenance are more convenient.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1-2, the biomass briquette and bun mixed backfire reverse layer-by-layer combustion device of the embodiment is provided with ash doors 9 at the bottoms of the left furnace body 151, the middle furnace body 152 and the right furnace body 153, respectively, and substances generated after the biomass briquette and the bun are combusted are removed from the inside of the device through the ash doors 9.
The fifth concrete implementation mode: the embodiment is described by combining fig. 1-2, the reverse layer-by-layer combustion device with the mixed backfire of the biomass briquette and the small square ladle of the embodiment further comprises an induced draft fan 12, the top of the middle furnace body 152 is communicated with the induced draft fan 12 through a flue gas pipeline 10, and the induced draft fan 12 provides upward power for the flue gas in the device, so that the flue gas in the later period is convenient to treat and recover.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1-2, based on the fifth embodiment, the biomass briquette and bun mixed backfire reverse layer-by-layer combustion device of the embodiment is provided with a dust removal device 16 on the flue gas pipeline 10, the dust removal device 16 prevents the flue gas pipeline from being blocked by smoke particles generated by combustion in the device, and the service life of the induced draft fan 12 is prolonged.
The seventh embodiment: the embodiment is described with reference to fig. 1 to 4, the biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device of the embodiment utilizes the traction force of a draught fan to suck and extract gas in the device upwards, and the working steps are as follows:
step a, manually filling biomass briquettes into a device from a biomass briquette feed port 111 for ignition;
b, conveying the biomass small square bags into the device by using a conveying belt 4;
c, biomass briquette burning flame downwards ignites the biomass small square bag to form semi-gasification, the flame, gasification products and smoke continue to downwards, the burning temperature of the main combustion chamber 13 is highest at the moment, heat is transferred to water in the heat absorption water pipe 5 at the moment, the water exchanges heat with air in the air heating pipe 11 and high-temperature smoke in the device, and the smoke in the device is absorbed layer by temperature and then is discharged out of the furnace through the induced draft fan 12;
step d, air enters an air pipe 17 connected with the primary air inlet 2, the secondary air inlet 7 and the tertiary air inlet 14 after being preheated by an air heating pipe 11, and the air pipe 17 sends the air into the first heating layer, the second heating layer and the third heating layer for combustion supporting;
and e, preheating the water in the water replenishing heating pipe 6 by using the flue gas, then feeding the water into the heat absorption water pipe 5, and finally converging the water in the heat supply water outlet pipe 18 and then feeding the water into a heat supply pipe network.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.

Claims (10)

1. Reverse successive layer burner of backfire is mixed with little square ladle to living beings briquetting, its characterized in that: including heat absorption water pipe (5), moisturizing heating pipe (6), left side furnace body (151), middle part furnace body (152) and right side furnace body (153) communicate the installation respectively from a left side to the right side, left side furnace body (151), the inside circulation of middle part furnace body (152) and right side furnace body (153) is arranged and is installed heat absorption water pipe (5), heat absorption water pipe (5) and moisturizing heating pipe (6) intercommunication, the outside of left side furnace body (151) and right side furnace body (153) is provided with living beings briquetting pan feeding mouth (111) and living beings cube package pan feeding mouth (112) respectively, inside setting up of middle part furnace body (152) is main combustion chamber (13), install moisturizing heating pipe (6) in middle part furnace body (152), moisturizing heating pipe (6) and external boiler return water heat.
2. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 1, wherein: a primary air inlet (2) and a secondary air inlet (7) are formed in the left furnace body (151) and the right furnace body (153), and a tertiary air inlet (14) is formed in the bottom of the middle furnace body (152).
3. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 2, wherein: and the upper part of the middle furnace body (152) is provided with an air heating pipe (11), and the air led out of the air heating pipe (11) is respectively communicated with air pipes (17) arranged on the primary air inlet (2), the secondary air inlet (7) and the tertiary air inlet (14).
4. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 2, wherein: and the primary air inlet (2), the secondary air inlet (7) and the tertiary air inlet (14) are respectively provided with an electric regulating valve.
5. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 3, wherein: the air heating pipe (11) is arranged at the upper end of the water replenishing heating pipe (6), and the air pipe (17) is arranged at the lower end of the heat absorbing water pipe (5).
6. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 1, wherein: still include manual switch door (1), electronic picture peg door (3) and conveyer belt (4), install manual switch door (1) on living beings briquetting pan feeding mouth (111), install electronic picture peg door (3) on living beings small square bag pan feeding mouth (112), pan feeding mouth department of living beings small square bag pan feeding mouth (112) installs conveyer belt (4).
7. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 1, wherein: and the left furnace body (151), the middle furnace body (152) and the right furnace body (153) are respectively provided with an access door (8).
8. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 1, wherein: the bottom of the left furnace body (151), the bottom of the middle furnace body (152) and the bottom of the right furnace body (153) are respectively provided with an ash cleaning door (9).
9. The biomass briquette and small square ladle mixed backfire reverse layer-by-layer combustion device as claimed in claim 1, wherein: still include draught fan (12), flue gas pipeline (10) and draught fan (12) intercommunication installation are passed through at middle part furnace body (152) top.
10. The biomass briquette and cube pack mixed backfire reverse layer-by-layer combustion device according to claim 9, characterized in that: and the flue gas pipeline (10) is provided with a dust removal device (16).
CN202010573687.3A 2020-06-22 2020-06-22 Reverse layer-by-layer combustion device for mixed backfire of biomass briquette and small square ladle Pending CN111578263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010573687.3A CN111578263A (en) 2020-06-22 2020-06-22 Reverse layer-by-layer combustion device for mixed backfire of biomass briquette and small square ladle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010573687.3A CN111578263A (en) 2020-06-22 2020-06-22 Reverse layer-by-layer combustion device for mixed backfire of biomass briquette and small square ladle

Publications (1)

Publication Number Publication Date
CN111578263A true CN111578263A (en) 2020-08-25

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Application Number Title Priority Date Filing Date
CN202010573687.3A Pending CN111578263A (en) 2020-06-22 2020-06-22 Reverse layer-by-layer combustion device for mixed backfire of biomass briquette and small square ladle

Country Status (1)

Country Link
CN (1) CN111578263A (en)

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