CN221858832U - A high-efficiency and energy-saving hot air furnace - Google Patents

Abstract

The utility model relates to the technical field of hot blast stoves, in particular to a high-efficiency energy-saving hot blast stove which comprises a stove body, wherein a chimney is arranged in the inner cavity of the stove body along the circumferential direction, and a smoke return port communicated with the inner cavity of the stove body is reserved at the top end of the chimney; a combustion box communicated with the chimney is arranged on one side of the furnace body, and a fuel supply port is reserved on one side of the combustion box; the furnace body is provided with an air inlet pipe extending to the inner cavity of the furnace body from outside, the air inlet pipe is connected with a first heat exchange pipe of a spiral surrounding chimney, and the first heat exchange pipe is connected with a second heat exchange pipe of the spiral surrounding chimney. The whole multi-layer sleeve design is adopted, so that double return strokes of flue gas and air are realized, the heat exchange efficiency is improved, the utilization rate of heat of the flue gas is improved, the first heat exchange tube adopts an advanced spiral annular tube heat exchange technology and a turbulent flow principle, the thickness of thin-layer flow is reduced, the air and the flue gas are continuously exchanged in operation, the heat exchange effect is greatly enhanced, and the energy saving rate is 60% -70% compared with that of a common hot blast stove.

Description

A high-efficiency and energy-saving hot air furnace

Technical Field

The utility model relates to the technical field of hot blast stoves, in particular to a high-efficiency energy-saving hot blast stove.

Background Art

The principle of hot air furnace is to convert the heat generated by fuel combustion into hot air, so an air inlet is needed to provide enough oxygen to enable the fuel to burn fully. There are many types of hot air furnaces. According to the type of fuel, they can be divided into coal, oil, gas furnaces, etc.; according to the combustion method, they can be divided into hand-burning, machine-burning, etc.; according to the structural form, they can be divided into horizontal, vertical, etc. Different types of hot air furnaces are suitable for different industrial fields and process requirements.

The heat transfer of traditional hot blast furnaces mainly relies on natural convection, which has low heat exchange efficiency and large heat loss, resulting in low thermal efficiency. Due to the low thermal efficiency, traditional hot blast furnaces need to consume more fuel to generate the required heat, resulting in high fuel consumption, inability to fully utilize the waste heat in the flue gas, and low energy recovery rate.

Utility Model Content

The utility model aims at the technical problems existing in the prior art and provides a high-efficiency and energy-saving hot blast furnace to solve the problems of low heat exchange efficiency and high fuel consumption of the hot blast furnace.

The technical solution of the utility model to solve the above-mentioned technical problems is as follows: a high-efficiency and energy-saving hot blast furnace, comprising a furnace body, a chimney is circumferentially arranged in the inner cavity of the furnace body, and a smoke return port connected to the inner cavity of the furnace body is reserved at the top of the chimney; a combustion box connected to the chimney is arranged on one side of the furnace body, and a fuel supply port is reserved on one side of the combustion box; an air intake pipe extending from the outside to the inner cavity of the furnace body is installed on the furnace body, and the air intake pipe is connected to a first heat exchange pipe spirally surrounding the chimney, and the end of the first heat exchange pipe is connected to a second heat exchange pipe extending downward along the inner cavity of the furnace body; the second heat exchange pipe is connected to an exhaust pipe extending to the outside of the furnace body; the chimney is also provided with a smoke return pipe extending from the lower layer of the chimney inner cavity to the upper layer of the furnace body inner cavity; the upper layer of the furnace body inner cavity is also provided with a smoke exhaust pipe.

On the basis of the above technical solution, the present invention can also be improved as follows:

Furthermore, the air intake pipe is provided with an air intake fan, and the exhaust pipe is provided with an exhaust fan.

Furthermore, a smoke return fan is installed on the smoke return pipe.

Furthermore, a combustion-supporting chamber located below the combustion box is reserved on one side of the furnace body, and the combustion box is provided with an air hole connected to the combustion-supporting chamber.

Furthermore, a box door is provided at the fuel supply port of the combustion box.

Furthermore, the side wall of the furnace body is also provided with a detachable dust cleaning baffle.

Furthermore, a detachable top cover is mounted on the top of the furnace body via a plurality of buckles.

Furthermore, the exhaust end of the smoke return pipe is connected to a first connecting pipe extending downward along the inner cavity of the furnace body; the air inlet end of the smoke exhaust pipe is connected to a second connecting pipe extending downward along the inner cavity of the furnace body.

Moreover, the high-efficiency and energy-saving hot air furnace provided by the utility model has at least the following beneficial effects compared with the prior art:

1) The overall multi-layer sleeve design realizes double return of flue gas and air, improves heat exchange efficiency and utilization of flue gas heat. The first heat exchange tube adopts advanced spiral ring tube heat exchange technology and turbulent flow principle to reduce the thickness of laminar flow, so that air and flue gas can continuously exchange rotation direction during operation, greatly enhancing the heat exchange effect. The energy saving rate is between 60% and 70% compared with ordinary hot blast furnaces.

2) Use various coals, biomass pellets, biofuels, etc. as fuels, and equip with secondary air inlet devices to allow the fuel to burn completely, greatly saving fuel, improving combustion efficiency, and reducing carbon pollution.

3) This furnace is a universal hot air device, which is used in conjunction with drying equipment for various materials. It is widely used in heating, dehumidifying and drying agricultural products, food, pharmaceuticals, chemical raw materials, light and heavy industrial products. It can also be used for heating various facilities and dehumidifying workshops.

4) The flue gas longitudinally flushes the heat dissipation pipe and the negative pressure smoke exhaust method is used. The heat exchange part does not accumulate dust and needs to be cleaned, and the thermal performance is stable and efficient.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the overall structure of the utility model;

FIG2 is a schematic diagram of the overall structure of the utility model from another perspective;

Fig. 3 is an internal cross-sectional view of the utility model;

FIG. 4 is an internal cross-sectional view of the present invention from another perspective.

In the accompanying drawings, the components represented by the reference numerals are listed as follows:

1. Furnace body, 1.1. Combustion chamber, 2. Chimney, 3. Combustion box, 3.1. Box door, 3.2. Ash cleaning baffle, 3.3. Top cover, 4. Air inlet pipe, 5. First heat exchange pipe, 6. Second heat exchange pipe, 7. Exhaust pipe, 8. Return smoke pipe, 9. Exhaust pipe, 10. Air inlet fan, 11. Exhaust fan, 12. Return smoke fan, 13. First connecting pipe, 14. Second connecting pipe.

DETAILED DESCRIPTION

The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

As shown in Figures 1 to 4, the high-efficiency energy-saving hot blast furnace of the practical design comprises a furnace body 1, wherein a chimney 2 is circumferentially arranged in the inner cavity of the furnace body 1, and a smoke return port connected to the inner cavity of the furnace body 1 is reserved at the top of the chimney 2; a combustion box 3 connected to the chimney 2 is arranged on one side of the furnace body 1, and a fuel supply port is reserved on one side of the combustion box 3; an air intake pipe 4 extending from the outside to the inner cavity of the furnace body 1 is mounted on the furnace body 1, and the air intake pipe 4 is connected to a first heat exchange pipe 5 spirally surrounding the chimney 2, and the end of the first heat exchange pipe 5 is connected to a second heat exchange pipe 6 extending downward along the inner cavity of the furnace body 1; the second heat exchange pipe 6 is connected to an exhaust pipe 7 extending to the outside of the furnace body 1; the chimney 2 is also provided with a smoke return pipe 8 extending from the lower layer of the inner cavity of the chimney 2 to the upper layer of the inner cavity of the furnace body 1; a smoke exhaust pipe 9 is also provided on the upper layer of the inner cavity of the furnace body 1.

In this embodiment, after the fuel is put into the combustion box 3 through the fuel supply port, it is mixed with the air entering the combustion box and then burned to produce high-temperature flue gas; after the high-temperature flue gas first enters the chimney 2, the high-temperature flue gas will quickly heat up the entire chimney 2, and transfer heat with the first heat exchange tube 5 through the outer wall of the chimney 2. The cold air enters the first heat exchange tube 5 from the air inlet pipe 4 and is preheated. At the same time, the high-temperature flue gas will enter the inner cavity of the furnace body 1 along the flue gas return port to exchange heat with the outer wall of the first heat exchange tube 5, thereby heating the air in the first heat exchange tube 5, thereby quickly heating the air in the first heat exchange tube 5. Finally, the hot air is transported from the first heat exchange tube 5 to the second heat exchange tube 6 for further heat exchange, and finally the high-temperature air is discharged from the exhaust pipe 9. The flue gas that has undergone heat exchange is discharged by the exhaust pipe 9 and can be supplied to equipment that requires clean hot air through pipelines.

The high-efficiency and energy-saving hot blast furnace designed by the utility model is a multi-layer sleeve design as a whole, which realizes double return of flue gas and air, improves the heat exchange efficiency and the utilization rate of flue gas heat. The first heat exchange tube 5 adopts advanced spiral ring tube heat exchange technology and turbulent flow principle to reduce the laminar flow thickness, so that the air and flue gas continuously exchange rotation direction during operation, which greatly enhances the heat exchange effect.

As an implementation mode, the air intake pipe 4 is provided with an air intake fan 10, and the air exhaust pipe 7 is provided with an air exhaust fan 11. Through the coordinated operation of the air intake fan 10 and the air exhaust fan 11, the high-efficiency and energy-saving hot air furnace can continuously, stably and efficiently provide high-temperature hot air to meet the needs of users. In addition, the adjustment of the air intake fan 10 and the air exhaust fan 11 can realize the control of the hot air temperature and flow rate, further improving the flexibility and adjustability of the hot air furnace.

In addition, through the cooperation of the smoke return fan 12, the high-efficiency and energy-saving hot blast furnace can realize stable control of the furnace cavity temperature, avoid excessively high or low temperature, and improve the safety and stability of the hot blast furnace. In addition, the adjustment of the smoke return fan can realize fine control of the furnace cavity temperature.

As an embodiment, a combustion chamber 1.1 is reserved on one side of the furnace body 1 and is located below the combustion box 3. The combustion box 3 is provided with an air hole connected to the combustion chamber 1.1. The combustion chamber 1.1 provides a preheating area for the fuel, thereby improving the combustion efficiency of the fuel. The combustion chamber is connected to the combustion box through the air hole, and the preheated air enters the combustion box through the air hole, mixes with the fuel, and promotes combustion.

In addition, a box door 3.1 is provided at the fuel supply port of the combustion box 3, and the design of the box door can prevent external air from entering the combustion box and affecting the combustion efficiency. At the same time, the box door can also prevent heat loss and improve thermal efficiency.

As a supplement, various coals, biomass pellets, biofuels, etc. can be used as fuel, and they are equipped with secondary air intake to allow the fuel to burn completely, greatly saving fuel, improving combustion efficiency, and reducing carbon pollution.

As an implementation mode, the side wall of the furnace body 1 is also provided with a detachable cleaning baffle 3.2. When cleaning is required, the cleaning baffle 3.2 is removed for cleaning and maintenance.

During the cleaning process, you can use special cleaning tools or manual cleaning methods to clean out the dust and debris in the furnace body. During maintenance, you can check whether the various parts of the furnace body are normal, and replace or repair them if necessary.

As an implementation mode, a detachable top cover 3.3 is installed on the top of the furnace body 1 through a plurality of buckles. Through the design of the top cover, the high-efficiency and energy-saving hot blast furnace can be more conveniently maintained and serviced, thereby improving its operating efficiency and stability.

As an implementation mode, the exhaust end of the smoke return pipe 8 is connected to a first connecting pipe 13 extending downward along the inner cavity of the furnace body 1; the air inlet end of the smoke exhaust pipe 9 is connected to a second connecting pipe 14 extending downward along the inner cavity of the furnace body 1; the flow formation of the flue gas in the inner cavity of the furnace body 1 is increased by the first connecting pipe 13 and the second connecting pipe 14, ensuring that the high-temperature flue gas can fully exchange heat with the air.

It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

Although the preferred embodiments of the utility model have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (8)

1. The efficient energy-saving hot blast stove is characterized by comprising a stove body (1), wherein a chimney (2) is arranged in the inner cavity of the stove body (1) along the circumferential direction, and a smoke return port communicated with the inner cavity of the stove body (1) is reserved at the top end of the chimney (2); a combustion box (3) communicated with the chimney (2) is arranged on one side of the furnace body (1), and a fuel supply port is reserved on one side of the combustion box (3); an air inlet pipe (4) extending to the inner cavity of the furnace body (1) from outside is arranged on the furnace body (1), the air inlet pipe (4) is connected with a first heat exchange pipe (5) spirally encircling the chimney (2), and the tail end of the first heat exchange pipe (5) is connected with a second heat exchange pipe (6) extending downwards along the inner cavity of the furnace body (1); the second heat exchange tube (6) is connected with an exhaust tube (7) extending to the outside of the furnace body (1); a smoke return pipe (8) extending from the lower layer of the inner cavity of the chimney (2) to the upper layer of the inner cavity of the furnace body (1) is further arranged on the chimney (2); the upper layer of the inner cavity of the furnace body (1) is also provided with a smoke exhaust pipe (9).

2. The efficient and energy-saving hot blast stove according to claim 1, characterized in that the air inlet pipe (4) is provided with an air inlet fan (10), and the air outlet pipe (7) is provided with an air outlet fan (11).

3. A stove according to claim 1, characterized in that the smoke return pipe (8) is provided with a smoke return fan (12).

4. The efficient and energy-saving hot blast stove according to claim 1, characterized in that a combustion-supporting chamber (1.1) positioned below the combustion box (3) is reserved on one side of the stove body (1), and the combustion box (3) is provided with an air hole communicated with the combustion-supporting chamber (1.1).

5. A stove according to claim 1, characterized in that the fuel supply of the combustion box (3) is also provided with a box door (3.1).

6. The efficient and energy-saving hot blast stove according to claim 1, characterized in that a detachable ash removal baffle (3.2) is further arranged on the side wall of the stove body (1).

7. A stove according to any one of claims 1-6, characterized in that the top of the stove body (1) is provided with a removable top cover (3.3) by means of a number of snap-locks.

8. The high-efficiency energy-saving hot blast stove according to claim 1, characterized in that the exhaust end of the smoke return pipe (8) is connected with a first communication pipe (13) extending downwards along the inner cavity of the stove body (1); the air inlet end of the smoke exhaust pipe (9) is connected with a second communicating pipe (14) which extends downwards along the inner cavity of the furnace body (1).