Hot blast stove with waste gas recovery function

Abstract

The hot blast stove with the waste gas recycling function comprises a shell, a combustion kettle, a hot air pipe and a heat exchange assembly, the combustion kettle is installed in an inner cavity of the shell, the hot air pipe is arranged over the combustion kettle, the heat exchange assembly is arranged on one side of the combustion kettle, a feeding port is formed in the side wall of the combustion kettle, and the hot air pipe is arranged in the inner cavity of the shell. A guide groove is formed in the inner side of the feeding port, a first air inlet mechanism is arranged over the combustion kettle, and second air inlet mechanisms are arranged on the two sides of the combustion kettle. According to the hot-blast stove with the waste gas recycling function, firstly, heat generated by combustion of the combustion kettle is transferred through the hot-blast pipe, heat in waste gas is transferred through the heat exchange assembly, the waste gas is filtered, the waste gas recycling function is achieved through the heat exchange assembly, heat exchange is conducted through the first heat exchange pipe and the second heat exchange pipe, and the waste gas recycling function is achieved. Heat in the waste gas is transferred, the heat exchange efficiency of the heat exchange piece is improved, heat wasted by the hot blast stove is reduced, and the fuel consumption of the hot blast stove is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast stoves, in particular to a hot blast stove with a waste gas recovery function. Background Art

[0002] A hot air furnace is a device that generates heat by burning fuel and transfers the heat to other objects or spaces in the form of steam or hot air. It is widely used in industrial production for heating, heat preservation, drying, roasting and other processes. The fuel types of hot air furnaces usually include oil, gas and composite fuels.

[0003] For example, application number CN202010166614.2 provides a hot air furnace, which is conducive to allowing the heat generated in the combustion chamber to enter the interior of the hot air pipe during operation, and allowing the flue gas generated during combustion to enter the heating box and enter the recovery box through the waste heat recovery pipe. During the flue gas discharge, the heat passes through the waste heat recovery pipe and the inside of the recovery box, and then is transported to the interior of the heating box, which is convenient for preheating and recovery work and is conducive to energy saving work; when the above-mentioned device is exhausting smoke, it only filters the flue gas, that is, it filters the dust particles in the flue gas, but there is a lot of heat in the flue gas generated by the hot air furnace, and then directly discharging the flue gas will lose a lot of heat, which is not conducive to circular development. Therefore, a new hot air furnace that can recycle waste gas is needed.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a hot air furnace with exhaust gas recovery function is proposed to achieve a more practical purpose. Utility Model Content

[0005] The purpose of the utility model is to provide a hot air stove with a waste gas recovery function to solve the problem of having a waste gas recovery function proposed in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: A hot blast furnace with waste gas recycling function, including casing, combustion kettle, hot blast pipe and heat exchange component, the combustion kettle is installed in the inner chamber of casing, and the top of combustion kettle is provided with hot blast pipe, one side of combustion kettle is provided with heat exchange component, the side wall of combustion kettle is provided with feed inlet, and the inboard side of feed inlet is provided with guide groove, the top of combustion kettle is provided with first air inlet mechanism, both sides of combustion kettle are provided with second air inlet mechanism, the heat exchange component includes filter mechanism and ventilation duct, the filter mechanism is installed in the inboard side of ventilation duct, and ventilation duct is installed in one side of combustion kettle, one side of filter mechanism is provided with first heat exchange pipe, the lower side of first heat exchange pipe is provided with water tank, and one end of first heat exchange pipe is provided with water pump, the inner chamber of water tank is provided with second heat exchange pipe, and the side wall of water tank is provided with water inlet, one side of first heat exchange pipe is provided with exhaust blower, the filter mechanism includes ceramic fiber web and high temperature resistant activated carbon, and ceramic fiber web is provided with several groups, and high temperature resistant activated carbon is arranged between several groups of ceramic fiber web.

[0007] Further, the inner chamber of the combustion kettle is provided with a kettle core rod, the bottom end surface of the combustion kettle is connected with a discharge plate through detachable bolts, the first air inlet mechanism includes a first air inlet duct and a filter screen, the first air inlet duct is installed longitudinally through the upper end surface of the casing, and one end of the first air inlet duct is provided with a filter screen, the inboard side of the first air inlet duct is provided with a first air inlet blower, the second air inlet mechanism includes an air inlet and a second air inlet duct, the air inlet is installed on the bottom end surface of the casing, and the second air inlet duct is provided above the air inlet, the inboard side of the second air inlet duct is provided with a second air inlet blower, wherein the second air inlet mechanism is provided with two groups.

[0008] Further, one end of the first heat exchange pipe is in communication with the input end of the water pump, the other end of the first heat exchange pipe extends to the bottom end surface of the inner chamber of the water tank, the upper end surface of the water tank is provided with a water inlet pipe, and the output end of the water pump is in communication with the water tank, the water tank is in communication with the water inlet, both ends of the second heat exchange pipe extend to one side of the water tank, and the contact surface of the second heat exchange pipe and the water tank is provided with a sealing ring.

[0009] Further, one end of the second air inlet duct extends above the bottom end surface of the inner chamber of the combustion kettle, the inner chamber of the casing is in communication with the outside of the casing through the ventilation duct, the first air inlet duct and the second air inlet duct.

[0010] Further, the guide groove is inclinedly arranged, and the edge of the guide groove is directly above the combustion kettle, the air inlet end of the second air inlet duct is provided with a filter screen, the bottom end surface of the casing is provided with a grating plate, and the grating plate is snap-fit connected with the casing.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the hot blast furnace with the exhaust gas recovery function first transfers the heat of the combustion kettle through the hot blast pipe, and uses the heat exchange component to transfer the heat in the exhaust gas, while filtering the exhaust gas, and then uses the heat exchange component to recover the exhaust gas, and uses the first heat exchange pipe and the second heat exchange pipe therein to exchange heat so as to transfer the heat in the exhaust gas, which can improve the heat exchange efficiency of the heat exchange component, thereby reducing the heat wasted in the hot blast furnace and reducing the fuel consumption of the hot blast furnace;

[0012] The hot air furnace with the exhaust gas recovery function is used to first feed the combustion raw materials into the combustion kettle through the feed port and the guide groove, wherein the combustion raw materials are ignited by the kettle core rod, and then the heat is generated in the hot air pipe, and the heat exchange is performed by the hot air pipe, wherein four groups of hot air pipes are provided, and the hot air pipes are staggered, and the air is supplied to the combustion kettle through the first air inlet mechanism and the second air inlet mechanism, so that the combustion raw materials in the combustion kettle are burned, wherein the first air inlet blower is started to make the first air inlet duct and the filter screen transmit the air volume to the top of the combustion kettle, and the second air inlet blower is started to transmit the air volume to the bottom end surface of the combustion kettle cavity through the air inlet and the second air inlet duct, thereby facilitating the combustion of the fuel in the combustion kettle, thereby generating heat, so that the hot air pipe can perform heat transfer, and the exhaust gas generated by the combustion heat of the combustion kettle is discharged through the heat exchange component, wherein after the combustion kettle is burned, the discharge plate is opened to take out the burned waste, so that the combustion kettle can be used again for combustion later;

[0013] The hot air furnace with the exhaust gas recovery function uses a heat exchange component to exchange heat in the exhaust gas, wherein the exhaust blower is started to discharge the exhaust gas through the ventilation duct, and during the exhaust process, the ceramic fiber mesh and high-temperature resistant activated carbon in the filter mechanism are first used to filter the exhaust gas, wherein the exhaust gas is started when passing through the ventilation duct, and the water pump drives the water in the water tank cavity to pass through the first heat exchange tube and return to the inner cavity of the water tank, and when the water passes through the first heat exchange tube, the exhaust gas heats the first heat exchange tube, and finally heats the water in the water tank cavity, and the heat in the water tank cavity is transferred by the second heat exchange tube. The above structure enables this device to have a wind volume heat exchange mode, and at the same time, it can also heat the hot water by heating the water, so that the hot water can be heat exchanged in the first heat exchange tube and the second heat exchange tube, so that the heat in the exhaust gas can be transferred, which can improve the heat exchange efficiency of the heat exchange component, thereby reducing the heat wasted in the hot air furnace and reducing the fuel consumption of the hot air furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a hot air furnace with exhaust gas recovery function in the utility model;

[0015] Figure 2This is a schematic diagram of the front cross-section structure of a hot air furnace with exhaust gas recovery function in the utility model;

[0016] Figure 3 This is a schematic diagram of the front cross-section structure of a hot air furnace heat exchange component with exhaust gas recovery function in the utility model;

[0017] Figure 4 This is a schematic diagram of the front cross-section structure of a hot blast furnace combustion kettle with the function of recovering waste gas in the utility model.

[0018] In the figure: 1. Shell; 2. Combustion kettle; 3. Hot air pipe; 4. Heat exchange component; 401. Filter mechanism; 41. Ceramic fiber mesh; 42. High-temperature resistant activated carbon; 402. Ventilation duct; 403. First heat exchange tube; 404. Water tank; 405. Water pump; 406. Second heat exchange tube; 407. Water inlet; 408. Exhaust blower; 5. Feed inlet; 6. Guide groove; 7. First air inlet mechanism; 701. First air inlet duct; 702. Filter; 703. First air inlet blower; 8. Second air inlet mechanism; 801. Air inlet; 802. Second air inlet duct; 803. Second air inlet blower; 9. Kettle core rod; 10. Discharge plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1 to 4The utility model provides a technical scheme: a hot blast furnace with recovery waste gas function, including casing 1, combustion still 2, hot blast pipe 3 and heat exchange component 4, combustion still 2 is installed in the inner chamber of casing 1, and the just above of combustion still 2 is provided with hot blast pipe 3, and one side of combustion still 2 is provided with heat exchange component 4, and the lateral wall of combustion still 2 is provided with feed inlet 5, and the inside of feed inlet 5 is provided with guide slot 6, and the just above of combustion still 2 is provided with first air inlet mechanism 7, and the both sides of combustion still 2 are provided with second air inlet mechanism 8, heat exchange component 4 includes filter mechanism 401 and ventilation duct 402, filter mechanism 401 is installed in the inside of ventilation duct 402, and ventilation duct 402 is installed in one side of combustion still 2, and one side of filter mechanism 401 is provided with first heat exchange pipe 403, and the just below of first heat exchange pipe 403 is provided with water tank 404, and one end of first heat exchange pipe 403 is provided with water pump 405, and the inner chamber of water tank 404 is provided with second heat exchange pipe 406, and the lateral wall of water tank 404 is provided with water inlet 407, and one side of first heat exchange pipe 403 is provided with exhaust fan 408, filter mechanism 401 includes ceramic fiber net 41 and high temperature resistant activated carbon 42, and ceramic fiber net 41 is provided with several groups, and high temperature resistant activated carbon 42 is arranged between several groups of ceramic fiber net 41;

[0021] The inner chamber of combustion still 2 is provided with still core rod 9, and the bottom end surface of combustion still 2 is connected with discharge plate 10 through detachable bolt, first air inlet mechanism 7 includes first air inlet duct 701 and filter screen 702, first air inlet duct 701 is installed in the upper end surface of casing 1 longitudinally, and one end of first air inlet duct 701 is provided with filter screen 702, and the inside of first air inlet duct 701 is provided with first air inlet fan 703, second air inlet mechanism 8 includes air inlet 801 and second air inlet duct 802, air inlet 801 is installed in the bottom end surface of casing 1, and the above of air inlet 801 is provided with second air inlet duct 802, and the inside of second air inlet duct 802 is provided with second air inlet fan 803, wherein second air inlet mechanism 8 is provided with two groups;

[0022] The feed port 5 and the guide groove 6 are used to feed the combustion raw materials into the inner cavity of the combustion kettle 2, and the combustion raw materials are ignited by the kettle core rod 9 to generate heat for the hot air pipe 3, and heat exchange is performed through the hot air pipe 3. There are four groups of hot air pipes 3, and the hot air pipes 3 are staggered. The first air inlet mechanism 7 and the second air inlet mechanism 8 are used to supply air to the inner cavity of the combustion kettle 2 so that the inner cavity of the combustion kettle 2 burns the raw materials. The first air inlet blower 703 is started to make the first air inlet pipe 701 and the filter 702 The air volume is transferred to the top of the combustion kettle 2, and the second air inlet blower 803 is started. The air volume is transferred to the bottom end surface of the inner cavity of the combustion kettle 2 through the air inlet 801 and the second air inlet duct 802, so that the fuel in the inner cavity of the combustion kettle 2 burns to generate heat, so that the hot air pipe 3 can transfer heat and the exhaust gas generated by the combustion heat of the combustion kettle 2 is discharged through the heat exchange component 4. After the combustion kettle 2 is burned, the discharge plate 10 is opened to take out the burned waste so that the combustion kettle 2 can be used again for combustion.

[0023] The heat exchange component 4 is used to exchange the heat in the exhaust gas, and the exhaust blower 408 is started to discharge the exhaust gas through the ventilation duct 402. During the discharge process, the exhaust gas is filtered by the ceramic fiber mesh 41 and the high-temperature resistant activated carbon 42 in the filter mechanism 401. When the exhaust gas passes through the ventilation duct 402, the water pump 405 is started. The water pump 405 drives the water in the inner cavity of the water tank 404 to pass through the first heat exchange tube 403 and then return to the inner cavity of the water tank 404. When the water passes through the first heat exchange tube 403, The exhaust gas heats the first heat exchange tube 403, and ultimately heats the water in the inner cavity of the water tank 404. The heat in the inner cavity of the water tank 404 is transferred through the second heat exchange tube 406. The above structure enables the device to have a wind-volume heat exchange mode. At the same time, it can also use heated water to heat exchange hot water between the first heat exchange tube 403 and the second heat exchange tube 406, so as to transfer the heat in the exhaust gas, improve the heat exchange efficiency of the heat exchange component, reduce the heat wasted in the hot blast furnace, and reduce the fuel consumption of the hot blast furnace.

[0024] One end of the first heat exchange tube 403 is connected to the input end of the water pump 405, and the other end of the first heat exchange tube 403 extends to the bottom end surface of the inner cavity of the water tank 404. The upper end surface of the water tank 404 is provided with a water inlet pipe, and the output end of the water pump 405 is connected to the water tank 404, and the water tank 404 is connected to the water inlet 407. Both ends of the second heat exchange tube 406 extend to one side of the water tank 404, and the contact surface of the second heat exchange tube 406 and the water tank 404 is provided with a sealing ring.

[0025] One end of the second air inlet pipe 802 extends to the top of the bottom end face of the inner cavity of the combustion kettle 2, the inner cavity of the shell 1 is in communication with the outside of the shell 1 through the ventilation pipe 402, the first air inlet pipe 701 and the second air inlet pipe 802 respectively, the guide groove 6 is inclinedly arranged, and the edge of the guide groove 6 is directly above the combustion kettle 2, the air inlet end of the second air inlet pipe 802 is provided with a filter screen 702, and the bottom end face of the shell 1 is provided with a grating plate which is connected with the shell 1 in a buckling manner.

[0026] Working principle: when using a hot blast furnace with waste gas recycling function, first, the combustion raw materials are poured into the inner cavity of the combustion kettle 2 through the feeding port 5 and the guide groove 6, the combustion raw materials are ignited by the kettle core rod 9, the heat production of the hot blast pipe 3 is carried out, the heat exchange of the hot blast pipe 3 is carried out, and the heat exchange of the heat exchange assembly 4 is carried out. The waste gas is discharged through the ventilation pipe 402, and the waste gas is filtered through the ceramic fiber screen 41 and the high-temperature resistant activated carbon 42 in the filtering mechanism 401 in the process of discharge. When the waste gas passes through the ventilation pipe 402, the water pump 405 is started, the water in the inner cavity of the water tank 404 is driven to pass through the first heat exchange pipe 403, and then returns to the inner cavity of the water tank 404. When the water passes through the first heat exchange pipe 403, the waste gas heats the first heat exchange pipe 403, and then finally heats the water in the inner cavity of the water tank 404. The heat in the inner cavity of the water tank 404 is transferred through the second heat exchange pipe 406. The first air inlet pipe 701 and the filter screen 702 transmit the air volume to the top of the combustion kettle 2 by starting the first air inlet blower 703, and the air inlet 801 and the second air inlet pipe 802 transmit the air volume to the bottom end face of the inner cavity of the combustion kettle 2 by starting the second air inlet blower 803. The fuel in the inner cavity of the combustion kettle 2 is burned to generate heat, so that the hot blast pipe 3 transmits heat, and the waste gas generated by the combustion kettle 2 is discharged through the heat exchange assembly 4. After the combustion kettle 2 is burned, the discharge plate 10 is opened to take out the burned waste material, so as to continue to use the combustion kettle 2 subsequently.

Claims

1. A hot air furnace with waste gas recovery function, comprising a shell (1), a combustion kettle (2), a hot air pipe (3) and a heat exchange component (4), characterized in that: The combustion kettle (2) is installed in the inner cavity of the shell (1), and a hot air pipe (3) is provided directly above the combustion kettle (2); a heat exchange component (4) is provided on one side of the combustion kettle (2); a feed port (5) is provided on the side wall of the combustion kettle (2), and a guide groove (6) is provided on the inner side of the feed port (5); a first air inlet mechanism (7) is provided directly above the combustion kettle (2), and second air inlet mechanisms (8) are provided on both sides of the combustion kettle (2); the heat exchange component (4) includes a filter mechanism (401) and a ventilation duct (402); the filter mechanism (401) is installed on the inner side of the ventilation duct (402), and the ventilation duct (402) is installed on one side of the combustion kettle (2); A first heat exchange tube (403) is provided on one side of the filter mechanism (401), a water tank (404) is provided directly below the first heat exchange tube (403), and a water pump (405) is provided at one end of the first heat exchange tube (403), a second heat exchange tube (406) is provided in the inner cavity of the water tank (404), and a water inlet (407) is provided on the side wall of the water tank (404), an exhaust blower (408) is provided on one side of the first heat exchange tube (403), and the filter mechanism (401) includes a ceramic fiber mesh (41) and high-temperature resistant activated carbon (42), and the ceramic fiber mesh (41) is provided in a plurality of groups, and high-temperature resistant activated carbon (42) is provided between the plurality of groups of ceramic fiber mesh (41).

2. The hot air stove with waste gas recovery function according to claim 1, characterized in that: The inner cavity of the combustion kettle (2) is provided with a kettle core rod (9), and the bottom end surface of the combustion kettle (2) is connected to a discharge plate (10) by a detachable bolt. The first air inlet mechanism (7) includes a first air inlet duct (701) and a filter (702). The first air inlet duct (701) is longitudinally installed on the upper end surface of the shell (1), and a filter (702) is installed at one end of the first air inlet duct (701). A first air inlet blower (703) is installed on the inner side of the first air inlet duct (701). The second air inlet mechanism (8) includes an air inlet (801) and a second air inlet duct (802). The air inlet (801) is installed on the bottom end surface of the shell (1), and a second air inlet duct (802) is provided above the air inlet (801). A second air inlet blower (803) is provided on the inner side of the second air inlet duct (802), wherein the second air inlet mechanism (8) is provided with two groups.

3. The hot air stove with exhaust gas recovery function according to claim 1, characterized in that: One end of the first heat exchange tube (403) forms a communication structure with the input end of the water pump (405), the other end of the first heat exchange tube (403) extends to the bottom end surface of the inner cavity of the water tank (404), the upper end surface of the water tank (404) is provided with a water inlet pipe, and the output end of the water pump (405) forms a communication structure with the water tank (404), the water tank (404) and the water inlet (407) form a communication structure, both ends of the second heat exchange tube (406) extend to one side of the water tank (404), and the contact surface between the second heat exchange tube (406) and the water tank (404) is provided with a sealing ring.

4. The hot air stove with waste gas recovery function according to claim 1, characterized in that: One end of the second air inlet duct (802) extends to above the bottom end surface of the inner cavity of the combustion kettle (2), and the inner cavity of the shell (1) forms a communication structure with the outer side of the shell (1) through the ventilation duct (402), the first air inlet duct (701) and the second air inlet duct (802).

5. The hot air stove with waste gas recovery function according to claim 1, characterized in that: The guide groove (6) is arranged obliquely, and the edge of the guide groove (6) is directly above the combustion kettle (2). The air inlet end of the second air inlet duct (802) is provided with a filter (702), and the bottom end surface of the shell (1) is provided with a grid plate, and the grid plate is buckled and connected to the shell (1).

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