CN219572274U - Biomass briquette hot-blast stove - Google Patents

Abstract

The utility model relates to the technical field of biomass fuel combustion, in particular to a biomass briquette hot blast stove which comprises a stove body, wherein an inner cavity of the stove body is sequentially divided into a combustion chamber, a heat exchange chamber and an exhaust chamber which are mutually sealed from bottom to top; the top of the furnace body is provided with a tail gas pipe communicated with the exhaust chamber; and a plurality of heat exchange pipes which are communicated with the combustion chamber and the exhaust chamber from end to end and the middle section of which passes through the heat exchange chamber are also arranged in the furnace body. When the heat flow passes through the heat exchange chamber, the cold air fed by the air inlet pipe is conveyed along the heat exchange channel, and meanwhile, the cold air can be fully contacted with the heat exchange pipe, the heat exchange time of the cold air is prolonged by the heat exchange channel separated by the guide plate, the heat exchange of the air and the heat flow in the heat exchange pipe is ensured, the heat exchange efficiency is improved, the use of fuel is reduced, and the biomass briquette hot blast stove is more energy-saving and environment-friendly.

Description

Biomass briquette hot-blast stove

Technical Field

The utility model relates to the technical field of biomass fuel combustion, in particular to a biomass briquette hot blast stove.

Background

The hot blast stove is widely applied to the drying operation of foods, medicines and the like, the fuel is mainly coal, and the problem that the environment-friendly emission does not reach the standard is generally existed. The biomass fuel has the advantages of self as renewable energy sources, the fuel has low sulfur content, and the biomass fuel is energy-saving and environment-friendly and can reduce the production cost.

For example, chinese patent No. CN205002373U discloses a biofuel hot blast stove, which adopts an indirect multi-return hot blast stove of biomass fuel, and mainly uses a multi-return radiating pipe to exchange heat with air to convey hot air.

Although the heat exchange time of the medium can be increased by adopting the multi-return heat dissipation structure, the whole heat exchange process is carried out in the heat exchange chamber, and the heat exchange efficiency is difficult to ensure because the heat exchange area of the multi-return heat dissipation structure is limited, and the air in the whole heat exchange chamber is difficult to ensure to fully exchange heat.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model provides a biomass briquette hot blast stove for solving the problems that the air in the heat exchange chamber cannot be fully exchanged and the heat exchange efficiency is difficult to ensure.

The technical scheme for solving the technical problems is as follows: the biomass briquette hot blast stove comprises a stove body, wherein the inner cavity of the stove body is sequentially divided into a combustion chamber, a heat exchange chamber and an exhaust chamber which are mutually sealed from bottom to top; the top of the furnace body is provided with a tail gas pipe communicated with the exhaust chamber; a plurality of heat exchange tubes which are communicated with the combustion chamber and the exhaust chamber end to end respectively and the middle section of which passes through the heat exchange chamber are also arranged in the furnace body; a plurality of guide plates are arranged in the heat exchange chamber at intervals in the vertical direction, and the guide plates separate a continuous rotary heat exchange channel along the heat exchange chamber; the upper end and the lower end of the heat exchange channel are respectively communicated with an air inlet pipe and an air exhaust pipe which are arranged on the furnace body.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, a plurality of heat exchange tubes are arranged in an array along the transverse and longitudinal directions.

Further, a bottom separation plate is arranged between the combustion chamber and the heat exchange chamber; an upper partition plate is arranged between the heat exchange chamber and the exhaust chamber.

Further, a heating assembly is arranged in the combustion chamber of the furnace body, and a fuel adding door matched with the combustion chamber is further arranged on the side wall of the furnace body.

Further, the heating assembly comprises a fuel carrying tray and a blow box; the surface of the fuel bearing disc is provided with a plurality of vent holes which are uniformly distributed and communicated with the inner cavity of the air supply box; an air inlet is reserved on the air feeding box.

Further, a dust baffle is arranged at the air inlet of the air supply box, and an air supply small hole is arranged on the dust baffle.

Further, a plurality of supporting seats which are circumferentially and uniformly distributed are arranged at the bottom of the furnace body.

Further, a safety valve communicated with the heat exchange chamber is further arranged outside the furnace body.

The beneficial effects of the utility model are as follows: when the heat flow passes through the heat exchange chamber, the cold air fed by the air inlet pipe is conveyed along the heat exchange channel, and meanwhile, the cold air can be fully contacted with the heat exchange pipe, the heat exchange time of the cold air is prolonged by the heat exchange channel separated by the guide plate, the heat exchange of the air and the heat flow in the heat exchange pipe is ensured, the heat exchange efficiency is improved, the use of fuel is reduced, and the biomass briquette hot blast stove is more energy-saving and environment-friendly.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the internal cross-section of the present utility model;

FIG. 3 is a partial schematic view of the internal structure of the present utility model;

FIG. 4 is a partial schematic view of another view of the internal structure of the present utility model;

fig. 5 is a schematic structural view of the heating assembly of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. furnace body, 1.1, combustion chamber, 1.2, heat exchange chamber, 1.3, exhaust chamber, 2, intake pipe, 3, exhaust pipe, 4, tail gas pipe, 5, heat exchange pipe, 6, guide plate, 7, bottom division board, 8, upper division board, 9, fuel adding door, 10, fuel bearing disc, 11, air supply box, 12, dust board, 13, supporting seat, 14, relief valve.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

It should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined. The specific meaning of such terms in this patent will be understood by those of ordinary skill in the art as the case may be.

As shown in fig. 1, 2 and 3, the biomass briquette fuel hot blast stove of the present utility model comprises a stove body 1, wherein the inner cavity of the stove body 1 is sequentially divided into a combustion chamber 1.1, a heat exchange chamber 1.2 and an exhaust chamber 1.3 which are mutually sealed from bottom to top; the top of the furnace body 1 is provided with a tail gas pipe 4 communicated with the exhaust chamber 1.3; a plurality of heat exchange pipes 5 which are communicated with the combustion chamber 1.1 and the exhaust chamber 1.3 from end to end respectively are arranged in the furnace body 1, and the middle section of the heat exchange pipes passes through the heat exchange chamber 1.2; a plurality of guide plates 6 are arranged in the heat exchange chamber 1.2 at intervals in the vertical direction, and the guide plates 6 divide a continuous rotary heat exchange channel along the heat exchange chamber 1.2; the upper end and the lower end of the heat exchange channel are respectively communicated with an air inlet pipe 2 and an air exhaust pipeline 3 which are arranged on the furnace body 1. The combustion chamber 1.1 is used for combusting biomass fuel to provide a heat source, the generated heat flow is conveyed through the heat exchange tubes 5, and the heat flow enters the exhaust chamber 1.3 after heat exchange of the heat exchange chamber 1.2 and is exhausted through the tail gas tube 4; when heat flow passes through the heat exchange chamber 1.2, cold air fed by the air inlet pipe 2 can be conveyed along the heat exchange channel, meanwhile, the cold air can be fully contacted with the heat exchange pipe 5, the heat exchange time of the cold air is prolonged by the heat exchange channel separated by the guide plate 6, the heat flow in the air and the heat exchange pipe 5 is ensured to be fully exchanged, the heat exchange efficiency is improved, the use of fuel is reduced, and the heat exchange device is more energy-saving and environment-friendly.

The biomass fuel combusted in the combustion chamber 1.1 can be corn stalk fuel, wheat straw fuel, rice husk fuel, peanut shell fuel, bean straw fuel, sawdust fuel, bark fuel, branch fuel, chilli dry fuel, aldehydic slag fuel, cotton stalk fuel and the like; the above fuel is mainly classified into straw and wood.

For example, corn stalk, wheat stalk, rice husk, peanut shell and bean are used as stalks, capsicum stalk, cotton stalk, etc. the biomass briquette fuel processed with the materials has low heat value (about 3200-3800 in low heat value), high ash content and low cost, and is suitable for medium and large hot blast stove equipment. Woody materials such as unburned fuel, branch fuel and the like have higher heat value (the position can reach 3900-4300 kilocalories), lower ash content, and are more suitable for all hot blast stove equipment, but have higher cost than straw.

In addition, when the air inlet pipe 2 is used for conveying cold air, an air supply device, such as an air inlet fan, is required to be arranged on the air inlet pipe 2, and if the dried object has higher requirements on air, a filtering device can be additionally arranged at the air inlet to improve the purity of the air.

As an implementation manner, as shown in fig. 3 and fig. 4, a plurality of heat exchange tubes 5 are arranged in an array along the transverse and longitudinal directions, and the gaps between two adjacent heat exchange tubes 5 are controlled to be 15-20cm, so that the air conveyed by the air inlet pipe 2 can smoothly pass through the gaps between the heat exchange tubes 5, and a better heat exchange effect is ensured.

In addition, a bottom partition plate 7 is arranged between the combustion chamber 1.1 and the heat exchange chamber 1.2; an upper separation plate 8 is arranged between the heat exchange chamber 1.2 and the exhaust chamber 1.3, the combustion chamber 1.1, the heat exchange chamber 1.2 and the exhaust chamber 1.3 are separated by the upper separation plate 8 and the bottom separation plate 7, and the joint of the upper separation plate 8, the bottom separation plate 7 and the heat exchange tube 5 can be sealed by a sealing ring.

As an implementation mode, a heat supply assembly is arranged in the combustion chamber 1.1 of the furnace body 1, a fuel adding door 9 matched with the combustion chamber 1.1 is further arranged on the side wall of the combustion chamber, and a heat source is provided by the heat supply assembly to generate heat flow so as to exchange heat with air in the heat exchange chamber 1.2. Biomass fuel can be added through the fuel addition gate 9.

As an embodiment, as shown in fig. 5, the heating assembly includes a fuel carrying tray 10 and a blower box 11; the surface of the fuel bearing disc 10 is provided with a plurality of vent holes which are uniformly distributed and communicated with the inner cavity of the air supply box 11; an air inlet is reserved on the air supply box 11. The fuel can be added on the fuel bearing disk 10, and the air is fed along the air inlet and then contacts with the fuel through the vent holes, so that the fuel can be fully combusted.

In addition, a dust baffle 12 is arranged at the air inlet of the air supply box 11, air supply small holes are formed in the dust baffle 12, and ash involved in fuel combustion can partially fall down to the air supply box 11, so that excessive overflow can be avoided through covering of the dust baffle 12, and meanwhile, air delivery is ensured through the air supply small holes formed in the dust baffle 12; if the fuel is not burned sufficiently, the air circulation can be increased by opening the fuel addition door 9. When the ash in the air supply box 11 is to be cleaned, the dust plate 12 is removed.

As an embodiment, the bottom of the furnace body 1 is provided with a plurality of supporting seats 13 which are uniformly distributed along the circumferential direction, and the supporting seats 13 are used for supporting the whole furnace body 1 to ensure stability.

As an implementation mode, the outside of the furnace body 1 is also provided with a safety valve 14 communicated with the heat exchange chamber 1.2, so that excessive internal pressure of the heat exchange chamber 1.2 is avoided, pressure is relieved in time, and safety is ensured.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (8)

1. The biomass briquette hot blast stove is characterized by comprising a stove body (1), wherein the inner cavity of the stove body (1) is sequentially divided into a combustion chamber (1.1), a heat exchange chamber (1.2) and an exhaust chamber (1.3) which are mutually sealed from bottom to top; the top of the furnace body (1) is provided with a tail gas pipe (4) communicated with the exhaust chamber (1.3); a plurality of heat exchange pipes (5) which are communicated with the combustion chamber (1.1) and the exhaust chamber (1.3) from end to end respectively and the middle section of which passes through the heat exchange chamber (1.2) are also arranged in the furnace body (1); a plurality of guide plates (6) which are alternately arranged in a crossing manner along the vertical direction are arranged in the heat exchange chamber (1.2), and the plurality of guide plates (6) divide a continuous rotary heat exchange channel along the heat exchange chamber (1.2); the upper end and the lower end of the heat exchange channel are respectively communicated with an air inlet pipe (2) and an air exhaust pipeline (3) which are arranged on the furnace body (1).

2. A biomass briquette stove according to claim 1, characterized in that a plurality of the heat exchange tubes (5) are arranged in an array in the transverse and longitudinal directions.

3. The biomass briquette stove according to claim 1, characterized in that a bottom separation plate (7) is arranged between the combustion chamber (1.1) and the heat exchange chamber (1.2); an upper partition plate (8) is arranged between the heat exchange chamber (1.2) and the exhaust chamber (1.3).

4. The biomass briquette hot-blast stove according to claim 1, characterized in that a heating assembly is arranged in the combustion chamber (1.1) of the stove body (1), and the side wall of the heating assembly is also provided with a fuel adding door (9) matched with the combustion chamber (1.1).

5. The biomass briquette stove according to claim 4, characterized in that the heating assembly comprises a fuel carrying tray (10) and an air supply box (11); the surface of the fuel bearing disc (10) is provided with a plurality of vent holes which are uniformly distributed and communicated with the inner cavity of the air supply box (11); an air inlet is reserved on the air supply box (11).

6. The biomass briquette hot blast stove according to claim 5, wherein a dust board (12) is installed at an air inlet of the air supply box (11), and air supply small holes are formed in the dust board (12).

7. The biomass briquette hot-blast stove according to claim 1, characterized in that the bottom of the stove body (1) is provided with a plurality of supporting seats (13) which are uniformly distributed in the circumferential direction.

8. The biomass briquette hot blast stove according to claim 1, characterized in that the outside of the stove body (1) is further provided with a safety valve (14) in communication with the heat exchange chamber (1.2).