CN221858563U - A high-efficiency heat transfer hot air stove - Google Patents

Abstract

The utility model discloses a high-efficiency heat transfer type hot blast stove, which is characterized in that a first heat conducting plate is arranged to transfer heat generated by fuel combustion in a combustion chamber to a heat exchange chamber, a flue is arranged to discharge flue gas generated by combustion, a second heat conducting plate is arranged to transfer waste heat in the flue gas to the heat exchange chamber, the heat exchange chamber is divided into a first air flow channel and a second air flow channel by the first spiral heat conducting plate and the second spiral heat conducting plate, when cold air enters the heat exchange chamber, the cold air is preheated by the second heat conducting plate and heated in the first air flow channel and the second air flow channel by the first heat conducting plate, the first spiral heat conducting plate and the second spiral heat conducting plate to form hot air, and through coating an infrared high-emissivity coating on each heat conducting plate, oxidation and corrosion of each heat conducting plate at high temperature can be effectively prevented, the service life of the hot blast stove is prolonged, meanwhile, because the infrared high-emissivity material has stronger infrared absorption capacity, the heat transfer efficiency is further improved, and the purposes of energy conservation and consumption reduction are realized.

Description

A high-efficiency heat transfer hot air stove

Technical Field

The utility model relates to the technical field of hot air stoves, in particular to a hot air stove for a grain dryer, in particular to a high-efficiency heat transfer type hot air stove.

Background Art

With the transformation of my country's grain from rough retail management to intensive grain management, the previous method of removing grain moisture by artificial drying to keep the grain moisture below the safe storage moisture has been difficult to meet the requirements of grain drying. Grain drying hot air furnace can provide hot air for grain drying and is the most important equipment in grain drying equipment. The performance level of grain drying hot air furnace is directly related to the quality of grain drying. Therefore, the research and design of efficient and environmentally friendly grain drying hot air furnace has broad application prospects and far-reaching social significance.

With the requirements for grain quality, grain drying hot air furnace exchanges heat between the hot flue gas generated by fuel combustion and clean air through a heat exchanger, and the clean hot air generated is used to dry grain. Traditional grain drying hot air furnaces directly use metal materials for heat conduction, which has poor heat transfer effect and low heat utilization efficiency, and easily causes a large amount of heat loss during the working process, resulting in a large amount of energy waste. In addition, metal materials are prone to oxidation and corrosion at high temperatures for a long time, which affects the service life of the hot air furnace.

Utility Model Content

In order to solve the technical problems existing in the background technology, the utility model proposes a high-efficiency heat transfer hot air furnace. By coating an infrared high-emissivity coating on each heat conducting plate, the oxidation and corrosion of each heat conducting plate at high temperature can be effectively prevented, the service life of the hot air furnace can be increased, and the heat transfer efficiency can be improved, thereby achieving the purpose of energy saving and consumption reduction.

The purpose of the utility model can be achieved through the following technical solutions:

A high-efficiency heat transfer hot air furnace comprises a furnace body, a heat exchange chamber arranged in the furnace body, and a combustion chamber arranged below the heat exchange chamber. A first air inlet is arranged on one side of the heat exchange chamber, and an air outlet is arranged on the top of the heat exchange chamber. A first heat conduction plate is sealedly connected between the heat exchange chamber and the combustion chamber so that the heat generated by the combustion of fuel in the combustion chamber is transferred to the heat exchange chamber, and the cold air sent into the heat exchange chamber through the first air inlet is heated into hot air and then sent out through the air outlet. The upper and lower surfaces of the first heat conduction plate are coated with infrared high emissivity coatings.

Furthermore, an annular flue is provided between the heat exchange chamber and the inner wall of the furnace body, a smoke exhaust port is provided on the top of the furnace body, the flue connects the combustion chamber and the smoke exhaust port to discharge the smoke generated by the combustion of fuel in the combustion chamber, and a second heat conduction plate is sealed between the heat exchange chamber and the flue to conduct the heat attached to the smoke in the flue to the heat exchange chamber, thereby preheating the cold air sent into the heat exchange chamber through the first air inlet.

Furthermore, the second heat conducting plate is arranged in a wave shape, and both the inner and outer surfaces of the second heat conducting plate are coated with an infrared high emissivity coating.

Furthermore, a double-layer ash baffle is provided between the flue and the combustion chamber.

Furthermore, a first spiral heat conductive plate and a second spiral heat conductive plate are welded to the first heat conductive plate and are cross-arranged at equal intervals between the plate bodies. The first spiral heat conductive plate and the second spiral heat conductive plate are both sealed and connected to the top wall of the heat exchange chamber, so that a first air flow channel and a second air flow channel that are isolated from each other and arranged at intervals are formed between the first spiral heat conductive plate and the second spiral heat conductive plate.

Furthermore, a second air inlet is provided on one side of the heat exchange chamber, the first air flow channel connects the first air inlet and the air outlet, and the second air flow channel connects the second air inlet and the air outlet.

Furthermore, inner and outer surfaces of the first spiral heat conducting plate and the second spiral heat conducting plate are coated with infrared high emissivity coatings.

Furthermore, it also includes an ash collecting chamber arranged below the combustion chamber, and an ash collecting box is provided at the bottom of the ash collecting chamber.

Furthermore, a partition is connected between the combustion chamber and the ash collecting chamber, air holes are evenly distributed on the partition, an oxygen supply inlet is arranged below the partition, and the oxygen supply inlet is connected to an oxygen supply pipe that passes through the furnace body.

Furthermore, a fuel inlet is provided on one side of the combustion chamber.

The beneficial effects of the utility model are as follows: the high-efficiency heat transfer hot blast furnace provided by the present application has a first heat conducting plate arranged between the combustion chamber and the heat exchange chamber to transfer the heat generated by the combustion of the fuel in the combustion chamber to the heat exchange chamber, and a flue is arranged to discharge the smoke generated by the combustion, and a second heat conducting plate is arranged between the flue and the heat exchange chamber to transfer the residual heat in the smoke to the heat exchange chamber, and the heat exchange chamber is divided into a spiral first air flow channel and a second air flow channel by the first spiral heat conducting plate and the second spiral heat conducting plate in the heat exchange chamber, so that when the cold air enters the heat exchange chamber, it is first preheated by the second heat conducting plate, and is heated by the first heat conducting plate, the first spiral heat conducting plate and the second spiral heat conducting plate in the first air flow channel and the second air flow channel to form hot air, and finally is sent to the grain dryer to dry the grain, and by coating the first heat conducting plate, the second heat conducting plate, the first spiral heat conducting plate and the second spiral heat conducting plate on the infrared high emissivity coating, oxidation and corrosion of each heat conducting plate at high temperature can be effectively prevented, and the service life of the hot blast furnace can be increased, and at the same time, because the infrared high emissivity material has a strong infrared absorption ability, the heat transfer efficiency is further improved, and the purpose of energy saving and consumption reduction is achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the utility model.

FIG. 2 is a schematic diagram showing the arrangement of the heat exchange chamber of the present invention.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

As shown in Figure 1, the utility model provides a high-efficiency heat transfer hot air furnace, including a furnace body 1, a heat exchange chamber 2 arranged in the furnace body 1, and a combustion chamber 3 arranged below the heat exchange chamber 2. A first air inlet 21 penetrating the side wall of the furnace body 1 is provided on one side of the heat exchange chamber 2, and an air outlet 22 penetrating the top wall of the furnace body 1 is provided on the top of the heat exchange chamber 2. A first heat conduction plate 23 is sealed between the heat exchange chamber 2 and the combustion chamber 3 to conduct the heat generated by the combustion of the fuel in the combustion chamber 3 to the heat exchange chamber 2, and the cold air sent into the heat exchange chamber 2 through the first air inlet 21 is heated into hot air and then sent out through the air outlet 22.

An annular flue 4 is provided between the heat exchange chamber 2 and the inner wall of the furnace body 1. A smoke outlet 41 penetrating the top wall of the furnace body 1 is provided on the top. The flue 4 connects the combustion chamber 3 and the smoke outlet 41 to discharge the smoke generated by the combustion of fuel in the combustion chamber 3. A second heat conducting plate 42 is sealed between the heat exchange chamber 2 and the flue 4 to conduct the heat attached to the smoke in the flue 4 to the heat exchange chamber 2, preheating the cold air sent into the heat exchange chamber 2 through the first air inlet 21, realizing the utilization of the waste heat of the smoke, improving the efficiency of heat exchange, and achieving the purpose of energy saving and consumption reduction. The second heat conducting plate 42 is arranged in a wave shape, which increases the heat exchange area between the flue 4 and the heat exchange chamber 2 and improves the efficiency of heat exchange. A double-layer ash baffle 43 is provided between the flue 4 and the combustion chamber 3 to prevent the dust generated by the combustion of fuel from being discharged through the flue and polluting the environment.

As shown in FIG2 , the first heat conducting plate 23 is welded with the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 which are arranged crosswise at equal intervals between the plates. The first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 are both sealed and connected to the top wall of the heat exchange chamber 2, so that the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 form a mutually isolated first air flow channel 26 and a second air flow channel 27 which are arranged at intervals. A second air inlet 28 which passes through the side wall of the furnace body 1 is also provided on one side of the heat exchange chamber 2. The first air flow channel 26 connects the first air inlet 21 and the air outlet 22, and the second air flow channel 27 connects the second air inlet 28 and the air outlet 22, so that the cold air is heated into hot air in the first air flow channel 26/the second air flow channel 27 during the process of passing from the first air inlet 21/the second air inlet 28 to the air outlet 22, thereby extending the distance of the air flow, increasing the contact time and contact area between the air flow and the heat conducting plate, greatly improving the heat exchange efficiency, and thus achieving the purpose of energy saving and consumption reduction.

The upper and lower surfaces of the first heat conducting plate 23 are coated with an infrared high emissivity coating, the inner and outer surfaces of the second heat conducting plate 42 are coated with an infrared high emissivity coating, and the inner and outer surfaces of the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 are coated with an infrared high emissivity coating, wherein the infrared high emissivity coating adopts the infrared radiation coating material disclosed in Chinese Patent No. CN113979717B. By coating the first heat conducting plate 23, the second heat conducting plate 42, the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 with infrared high emissivity coatings respectively, the oxidation and corrosion of the first heat conducting plate 23, the second heat conducting plate 42, the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 at high temperature can be effectively prevented, thereby increasing the service life of the hot air furnace. At the same time, since the infrared high emissivity materials have strong infrared absorption ability, part of the heat absorbed by these infrared high emissivity coatings will be transferred to the first heat conducting plate 23, the second heat conducting plate 42, the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 through heat conduction, thereby conducting heat to the first air flow channel 26 and the second air flow channel 27 in the heat exchange chamber 2, while the other part of the heat will flow to the first air flow channel 26 and the second air flow channel 27 in the heat exchange chamber 2 in the form of infrared radiation and thermal convection, thereby solving the problems of low infrared emissivity of metal materials, selective absorption of infrared rays, low heating efficiency and large heat loss, further improving the heat transfer efficiency and achieving the purpose of energy saving and consumption reduction.

The hot blast furnace provided in the present application also includes an ash collecting chamber 5 arranged below the combustion chamber 3. An ash collecting box 51 is provided at the bottom of the ash collecting chamber 5 to collect and process the dust generated by the combustion of fuel in the combustion chamber 3, which is clean and environmentally friendly. A partition 52 is connected between the combustion chamber 3 and the ash collecting chamber 5. The partition 52 is evenly distributed with air holes. An oxygen supply inlet 53 is provided below the partition 52. The oxygen supply inlet 53 is connected to an oxygen supply pipe 54 that passes through the furnace body 1 to continuously supply oxygen to the combustion chamber 3, so that the combustion chamber 3 is always in an oxygen-rich state, ensuring that the fuel is fully burned and avoiding waste. A fuel inlet 31 that passes through the side wall of the furnace body 1 is provided on one side of the combustion chamber 3. The speed of adding fuel can be adjusted according to the actual air outlet temperature of the air outlet 22, and the operation is flexible.

When the hot blast furnace provided by the present application is working: first, fuel is added to the combustion chamber 3 through the fuel inlet 31 for combustion, and fresh air is continuously introduced into the combustion chamber 3 through the oxygen supply inlet 53 to ensure that the fuel is fully burned. At this time, the heat generated by the combustion of the fuel is transferred to the heat exchange chamber 2 through the first heat conducting plate 23, the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 in turn, and the smoke generated by the fuel is discharged from the smoke outlet 41 through the flue 4, and the residual heat of the smoke is transferred to the heat exchange chamber 2 through the second heat conducting plate 42. Then, the cold air outside the furnace body 1 enters the heat exchange chamber 2 through the first air inlet 21/the second air inlet 28, is preheated by the second heat conducting plate 42, and then enters the spiral first air flow channel 26/the second air flow channel 27, and is heated by the first heat conducting plate 23, the first spiral heat conducting plate 24 and the second spiral heat conducting plate 25 in the first air flow channel 26/the second air flow channel 27 to form hot air, and finally is sent to the grain dryer from the air outlet 22 to dry the grain.

The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims (10)

1. A high-efficiency heat transfer hot blast furnace, characterized in that it comprises a furnace body (1), a heat exchange chamber (2) arranged in the furnace body (1), and a combustion chamber (3) arranged below the heat exchange chamber (2), a first air inlet (21) is arranged on one side of the heat exchange chamber (2), an air outlet (22) is arranged on the top of the heat exchange chamber (2), a first heat conduction plate (23) is sealedly connected between the heat exchange chamber (2) and the combustion chamber (3), so that the heat generated by the combustion of fuel in the combustion chamber (3) is transferred to the heat exchange chamber (2), and the cold air sent into the heat exchange chamber (2) through the first air inlet (21) is heated into hot air and then sent out through the air outlet (22), and the upper and lower surfaces of the first heat conduction plate (23) are coated with infrared high emissivity coatings. 2. The hot blast furnace according to claim 1 is characterized in that an annular flue (4) is provided between the heat exchange chamber (2) and the inner wall of the furnace body (1), a smoke exhaust port (41) is provided at the top of the furnace body (1), the flue (4) connects the combustion chamber (3) and the smoke exhaust port (41) to discharge the smoke generated by the combustion of fuel in the combustion chamber (3), and a second heat conduction plate (42) is sealed between the heat exchange chamber (2) and the flue (4) to conduct the heat attached to the smoke in the flue (4) to the heat exchange chamber (2), so as to preheat the cold air sent into the heat exchange chamber (2) through the first air inlet (21). 3. The hot air stove according to claim 2 is characterized in that the second heat conducting plate (42) is arranged in a wave shape, and the inner and outer surfaces of the second heat conducting plate (42) are coated with an infrared high emissivity coating. 4. The hot blast stove according to claim 2, characterized in that a double-layer ash baffle (43) is provided between the flue (4) and the combustion chamber (3). 5. The hot blast stove according to claim 1 is characterized in that a first spiral heat conducting plate (24) and a second spiral heat conducting plate (25) are welded on the first heat conducting plate (23) and are cross-arranged at equal intervals between the plates; the first spiral heat conducting plate (24) and the second spiral heat conducting plate (25) are both sealedly connected to the top wall of the heat exchange chamber (2) so that a first airflow channel (26) and a second airflow channel (27) that are isolated from each other and arranged at intervals are formed between the first spiral heat conducting plate (24) and the second spiral heat conducting plate (25). 6. The hot air stove according to claim 5 is characterized in that a second air inlet (28) is further provided on one side of the heat exchange chamber (2), the first air flow channel (26) connects the first air inlet (21) and the air outlet (22), and the second air flow channel (27) connects the second air inlet (28) and the air outlet (22). 7. The hot blast stove according to claim 5, characterized in that the inner and outer surfaces of the first spiral heat conducting plate (24) and the second spiral heat conducting plate (25) are coated with an infrared high emissivity coating. 8. The hot blast stove according to claim 1, characterized in that it also comprises an ash collecting chamber (5) arranged below the combustion chamber (3), and an ash collecting box (51) is provided at the bottom of the ash collecting chamber (5). 9. The hot blast furnace according to claim 8 is characterized in that a partition (52) is connected between the combustion chamber (3) and the ash collecting chamber (5), air holes are evenly distributed on the partition (52), an oxygen supply inlet (53) is provided below the partition (52), and the oxygen supply inlet (53) is connected to an oxygen supply pipe (54) that passes through the furnace body (1). 10. The hot blast stove according to claim 1, characterized in that a fuel inlet (31) is provided on one side of the combustion chamber (3).