Dual fuel return air gasifier

Abstract

The utility model relates to domestic heating and cooking equipment technical field, especially a wood coal dual -purpose return air gasification furnace. Including furnace body base and furnace body top seat, install the combustion frame on the furnace body base, be equipped with the inner bag on the combustion frame, the inner bag outside is equipped with the intermediate plate of installing on the furnace body base and the intermediate plate is fixedly connected with the inner bag top through the ring baffle, the intermediate plate outside is equipped with the shell body of installing between the furnace body base and furnace body top seat, the one side of intermediate plate is connected with the feed inlet through the shell body, the feed inlet one end is installed with the cover, the furnace body base side away from the feed inlet is connected with the smoke box. The utility model provides a wood coal dual -purpose return air gasification furnace that gives consideration to efficient combustion, easy operation and environmental protection standard.

Description

Technical Field

[0001] This utility model relates to the technical field of household heating and cooking equipment, and in particular to a dual-use firewood and coal gasification furnace with return air. Background Technology

[0002] Household solid fuel stoves are core equipment for heating and cooking in rural households and outdoor work environments. Technological development focuses on improving fuel adaptability, thermal efficiency, and environmental performance. Traditional stoves typically use firewood or coal as a single fuel source, leaving room for improvement in energy efficiency and environmental friendliness.

[0003] The following defects are common in similar products on the market: most stoves are not compatible with different fuel types (such as firewood / coal), and fuel switching requires complex modifications, which limits the flexibility of use scenarios; due to incomplete combustion and serious heat loss, a large amount of energy is wasted, and the actual thermal efficiency is far lower than the theoretical value; the combustion process produces excessive smoke and carbon monoxide, which does not meet modern environmental protection standards and has a negative impact on indoor and outdoor air quality. Utility Model Content

[0004] This utility model provides a dual-purpose coal and diesel gasification furnace that combines efficient combustion, easy operation, and environmental compliance.

[0005] The technical solution adopted by this utility model is as follows: a dual-purpose coal and diesel gasification furnace with return air, including a furnace body base and a furnace body top seat. A combustion rack is installed on the furnace body base, and an inner liner is provided on the combustion rack. An intermediate plate installed on the furnace body base is sleeved on the outer side of the inner liner, and the intermediate plate is fixedly connected to the top of the inner liner by an annular baffle. An outer shell is sleeved on the outer side of the intermediate plate and installed between the furnace body base and the furnace body top seat. A feed inlet penetrating through the outer shell is connected to one side of the intermediate plate. A cover is installed at one end of the feed inlet. A smoke outlet box is connected to the side of the furnace body base away from the feed inlet.

[0006] As a further improvement of this utility model, an ash collection box is slidably connected inside the furnace body base, and a handle is fixedly connected to the front side of the ash collection box.

[0007] As a further improvement of this utility model, a screw is fixedly connected to one side of the cover, a rotating block is threaded onto the screw, a crank is fixedly connected to one end of the rotating block, and a stop bar that cooperates with the rotating block is fixedly connected to one side of the feed inlet.

[0008] As a further improvement of this utility model, several air inlets are provided on both sides of the furnace body base.

[0009] As a further improvement of this utility model, the top of the smoke outlet box is connected to a smoke outlet pipe extending to the top of the furnace body, and a smoke outlet valve is provided below the smoke outlet pipe.

[0010] As a further improvement of this utility model, a combustion chamber is formed inside the inner liner, and a return air chamber is formed between the intermediate plate and the outer shell.

[0011] As a further improvement of this utility model, the flue gas in the combustion chamber enters the return air chamber through the top of the inner liner, then enters the smoke outlet box through the opening, and finally is discharged through the smoke outlet pipe.

[0012] As a further improvement of this utility model, a rotating rod is rotatably connected to the furnace base and the combustion frame. Multiple rotating columns located inside the combustion frame are fixedly connected to the rotating rod. Multiple fixed columns spaced apart from the rotating columns are fixedly connected to the inner side of the combustion frame. A folding crank handle located outside the furnace base is fixedly connected to one end of the rotating rod.

[0013] As a further improvement of this utility model, the front side of the ash collection box is provided with multiple primary oxygen inlet holes and a first adjusting baffle is slidably connected at the primary oxygen inlet holes, and the inner side of the furnace body base is provided with multiple secondary oxygen inlet holes and a second adjusting baffle that cooperates with the secondary oxygen inlet holes is slidably connected on the furnace body base.

[0014] The beneficial effects of this utility model are as follows: This utility model achieves efficient and clean combustion of both diesel and coal fuels and fuel self-adaptation capability through an innovative multi-combustion chamber (combustion chamber + return air chamber) and stepped airflow organization design, combined with an adjustable oxygen supply system, thereby improving thermal efficiency and significantly reducing pollutant emissions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a dual-purpose coal and diesel gasification furnace according to this utility model.

[0016] Figure 2 This utility model relates to a dual-purpose (firewood and coal) return air gasification furnace. Figure 1 Another perspective illustration;

[0017] Figure 3 This is a partial cross-sectional view of a dual-purpose coal and diesel gasification furnace according to this utility model.

[0018] Figure 4 This is a schematic diagram of the flue gas flow of a dual-purpose coal and diesel gasification furnace according to this utility model.

[0019] Figure 5 This is a partial structural schematic diagram of a dual-purpose coal and diesel gasification furnace according to this utility model.

[0020] Figure 6 This utility model relates to a dual-purpose (firewood and coal) return air gasification furnace. Figure 5 Decomposition diagram of the structure.

[0021] As shown in the figure: 1. Furnace base; 2. Furnace top; 3. Combustion rack; 4. Inner liner; 5. Intermediate plate; 6. Outer shell; 7. Feed inlet; 8. Cover; 9. Smoke box; 10. Ash collection box; 11. Handle; 12. Screw; 13. Rotating block; 14. Crank handle; 15. Stop bar; 16. Air inlet; 17. Smoke outlet pipe; 18. Annular baffle; 19. Rotating column; 20. Fixed column; 21. Folding crank handle; 22. Primary oxygen inlet hole; 23. First adjusting baffle; 24. Second adjusting baffle; 25. Rotating rod; 26. Secondary oxygen inlet hole. Detailed Implementation

[0022] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0023] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0024] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] This utility model provides the following: Figure 1-6 The firewood and coal dual-use return air gasification furnace shown includes a furnace body base 1 and a furnace body top seat 2. A combustion rack 3 is installed on the furnace body base 1. An inner liner 4 is provided on the combustion rack 3. An intermediate plate 5 installed on the furnace body base 1 is sleeved on the outside of the inner liner 4, and the intermediate plate 5 is fixedly connected to the top of the inner liner 4 by an annular baffle 18. An outer shell 6 is sleeved on the outside of the intermediate plate 5 and installed between the furnace body base 1 and the furnace body top seat 2. A feed inlet 7 that passes through the outer shell 6 is connected to one side of the intermediate plate 5. A baffle 8 is installed at one end of the feed inlet 7. A smoke outlet box 9 is connected to the side of the furnace body base 1 away from the feed inlet 7.

[0026] like Figure 1 and Figure 2As shown, in this utility model, an ash collection box 10 is slidably connected inside the furnace body base 1, and a handle 11 is fixedly connected to the front side of the ash collection box 10, which makes it convenient for users to clean the ash produced by combustion regularly, so as to avoid the accumulation of ash affecting the normal use and combustion effect of the furnace. By pulling the handle 11, the ash collection box 10 can be easily pulled out from the furnace body base 1, and after cleaning, it can be pushed back to its original position.

[0027] like Figure 1 As shown, in this utility model, a screw 12 is fixedly connected to one side of the cover 8, and a rotating locking block 13 is threaded onto the screw 12. A crank handle 14 is fixedly connected to one end of the rotating locking block 13, and a stop bar 15 that cooperates with the rotating locking block 13 is fixedly connected to one side of the feed inlet 7. When the rotating locking block 13 is rotated to engage with the stop bar 15, the cover 8 is firmly fixed at the feed inlet 7 to prevent fuel leakage and heat loss. When fuel needs to be added, the crank handle 14 is turned in the opposite direction to disengage the rotating locking block 13 from the stop bar 15, and the cover 8 can be easily opened.

[0028] like Figure 1 and Figure 2 As shown, the furnace body base 1 of this utility model is provided with several air inlets 16 on both sides of the base. The air inlets 16 can provide sufficient oxygen for combustion and ensure that the fuel is fully burned.

[0029] like Figure 3 and Figure 4 As shown, in this utility model, the top of the smoke box 9 is connected to a smoke pipe 17 that extends to the top of the furnace body top seat 2, and a smoke valve is provided below the smoke pipe 17. The smoke valve can adjust the flow rate and speed of the smoke to adapt to the needs of different fuels and combustion states.

[0030] like Figure 3 and Figure 4 As shown, the inner liner (4) of this utility model forms a combustion chamber inside, and the middle plate (5) and the outer shell (6) form a return air chamber. The flue gas in the combustion chamber enters the return air chamber through the top of the inner liner (4) and then enters the smoke box (9) through the opening, and finally is discharged through the smoke pipe (17). This can improve the utilization rate of fuel, reduce energy waste, and reduce the content of harmful substances in the exhaust gas, which meets the environmental protection requirements. At the same time, the existence of the return air chamber can play a certain role in heat preservation of the furnace body, reduce heat loss, and further improve thermal efficiency.

[0031] like Figure 5 and Figure 6As shown, in this utility model, a rotating rod (25) is rotatably connected to the furnace base (1) and the combustion rack (3). A plurality of rotating columns (19) located inside the combustion rack (3) are fixedly connected to the rotating rod (25). A plurality of fixed columns (20) spaced apart from the rotating columns (19) are fixedly connected to the inner side of the combustion rack (3). A folding crank (21) located outside the furnace base (1) is fixedly connected to one end of the rotating rod (25). When it is necessary to clean the ash, the operator only needs to unfold the folding crank (21) and turn it gently. The cooperation between the rotating column (19) and the fixed column (20) can effectively break up large pieces of ash and make them fall into the ash collection box (10), avoiding the accumulation of ash layer affecting ventilation and combustion effect. When the folding crank (21) is not used, it can be folded up to reduce space occupation and make the furnace more compact.

[0032] like Figure 6 As shown, the ash collection box (10) of this utility model has multiple primary oxygen inlet holes (22) on the front side and a first adjusting baffle (23) is slidably connected at the primary oxygen inlet holes (22). The furnace body base (1) has multiple secondary oxygen inlet holes (26) on the inner side and a second adjusting baffle (24) that cooperates with the secondary oxygen inlet holes (26) is slidably connected on the furnace body base (1). The user can adjust the oxygen intake of the primary oxygen inlet holes 22 and the secondary oxygen inlet holes 26 by sliding the first adjusting baffle 23 and the second adjusting baffle 24 respectively. When using different fuels or in different combustion stages, the oxygen intake can be flexibly adjusted according to actual needs to ensure that the fuel is fully burned and improve thermal efficiency.

[0033] Working Principle: In practical implementation, fuel is first added to the combustion chamber formed by the inner liner 4 through the feed inlet 7. After addition, the rotating block 13 is rotated by the crank handle 14 to engage with the stop lever 15, fixing the cover 8 at the feed inlet 7 to prevent fuel leakage and heat loss. Simultaneously, depending on the fuel type and combustion state, the oxygen intake of the primary oxygen inlet 22 and secondary oxygen inlet 26 is adjusted by sliding the first adjusting baffle 23 and the second adjusting baffle 24, respectively, to provide sufficient and suitable oxygen for combustion.

[0034] The air inlets 16 on both sides of the furnace base 1 continuously supply oxygen for combustion, ensuring complete fuel combustion. The heat generated by the fuel combustion in the combustion chamber is used for heating or cooking, while the flue gas produced by combustion enters the return air chamber formed between the middle plate 5 and the outer shell 6 through the top of the inner liner 4. In the return air chamber, some of the heat in the flue gas is recovered and utilized, improving fuel utilization and reducing energy waste.

[0035] Afterwards, the flue gas enters the flue gas box 9 through the opening. The user can adjust the flue gas valve below the flue gas pipe 17 according to the actual situation to control the flow rate and speed of the flue gas. Finally, the treated flue gas is discharged from the furnace body through the flue gas pipe 17.

[0036] During combustion, a certain amount of ash will be produced over time. When it is necessary to clean up the ash, the operator unfolds and rotates the folding handle 21, causing the rotating rod 25 to rotate accordingly. The rotating column 19 and the fixed column 20 work together to break up large pieces of ash and allow them to fall into the ash collection box 10. To clean, simply pull the handle 11 on the front of the ash collection box 10 to remove it from the furnace base 1 for cleaning. After cleaning, push it back into its original position.

[0037] This dual-fuel (firewood and coal) gasifier utilizes a multi-combustion chamber and stepped airflow design, along with an adjustable oxygen supply system, to achieve highly efficient and clean combustion of both fuels and fuel adaptability. This not only improves thermal efficiency but also significantly reduces pollutant emissions, effectively meeting the heating and cooking needs of rural households and outdoor work environments.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual-purpose coal and diesel gasification furnace with return air, comprising a furnace body base (1) and a furnace body top seat (2), characterized in that: A combustion rack (3) is installed on the furnace base (1). An inner liner (4) is provided on the combustion rack (3). An intermediate plate (5) installed on the furnace base (1) is fitted on the outer side of the inner liner (4). The intermediate plate (5) is fixedly connected to the top of the inner liner (4) by an annular baffle (18). An outer shell (6) installed between the furnace base (1) and the furnace top seat (2) is fitted on the outer side of the intermediate plate (5). A feed inlet (7) that passes through the outer shell (6) is connected to one side of the intermediate plate (5). A cover (8) is installed at one end of the feed inlet (7). A smoke box (9) is connected to the side of the furnace base (1) away from the feed inlet (7).

2. The dual-use coal / fired power gasifier according to claim 1, characterized in that: The furnace body base (1) is slidably connected to an ash collection box (10), and a handle (11) is fixedly connected to the front side of the ash collection box (10).

3. The dual-use coal / fired power gasifier according to claim 1, characterized in that: A screw (12) is fixedly connected to one side of the cover (8), and a rotating block (13) is threaded onto the screw (12). A crank (14) is fixedly connected to one end of the rotating block (13), and a stop bar (15) that cooperates with the rotating block (13) is fixedly connected to one side of the feed inlet (7).

4. The dual-use coal / fired power gasifier according to claim 1, characterized in that: The furnace body base (1) has several air inlets (16) on both sides of its side walls.

5. A dual-purpose coal / diesel gasification furnace according to claim 1, characterized in that: The top of the smoke box (9) is connected to a smoke pipe (17) extending to the top of the furnace body top seat (2), and a smoke valve is provided below the smoke pipe (17).

6. A dual-purpose coal / diesel gasification furnace according to claim 1, characterized in that: The inner liner (4) forms a combustion chamber, and the middle plate (5) and the outer shell (6) form a return air chamber.

7. A dual-purpose coal / diesel gasification furnace according to claim 6, characterized in that: The flue gas in the combustion chamber enters the return air chamber through the top of the inner liner (4), then enters the smoke box (9) through the opening, and finally exits through the smoke pipe (17).

8. A dual-purpose coal and diesel gasification furnace according to claim 1, characterized in that: A rotating rod (25) is rotatably connected to the furnace base (1) and the combustion rack (3). A plurality of rotating columns (19) located inside the combustion rack (3) are fixedly connected to the rotating rod (25). A plurality of fixed columns (20) spaced apart from the rotating columns (19) are fixedly connected to the inner side of the combustion rack (3). A folding crank handle (21) located outside the furnace base (1) is fixedly connected to one end of the rotating rod (25).

9. A dual-purpose coal / fired power gasifier with return air as described in claim 2, characterized in that: The ash collection box (10) has multiple primary oxygen inlet holes (22) on its front side and a first adjusting baffle (23) is slidably connected at the primary oxygen inlet holes (22). The furnace body base (1) has multiple secondary oxygen inlet holes (26) on its inner side and a second adjusting baffle (24) that cooperates with the secondary oxygen inlet holes (26) is slidably connected on the furnace body base (1).

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