Hot-blast stove waste gas waste heat recycling equipment

Abstract

The utility model discloses hot blast stove waste gas waste heat recycling equipment which comprises a stove body and an air inlet. An air inlet is fixed to one side of the furnace body, a feeding port is fixed below the air inlet in one side of the furnace body, an ash removal chamber is arranged at the bottom of the furnace body, a combustion chamber is arranged at the bottom end in the furnace body, a heat exchange cavity is fixed to the other side of the furnace body, an exhaust fan is arranged on one side of the top of the furnace body, and a smoke pipe is arranged at one end of the exhaust fan. A dismounting structure is arranged at the other end of the exhaust fan, and a heat exchanger is arranged in the heat exchange cavity. The smoke pipe surrounds the outer side of the air inlet pipe, meanwhile, the exhaust fan can drive waste gas in the smoke pipe to flow, cold air in the air inlet pipe can be preheated through heat left in the waste gas in the smoke pipe at the moment, and when the cold air in the air inlet pipe enters the heat exchanger, the waste gas in the smoke pipe can be recycled, and the heat exchange efficiency is improved. Not only can the heating time be shortened, but also the effect of recycling the waste heat of the waste gas is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas utilization of hot blast stoves, and particularly relates to a device for recovering and utilizing the waste heat of hot blast stove waste gas. Background Art

[0002] A hot blast stove is a device used to generate high-temperature hot air. It generates high-temperature air by burning fuel or converting electrical energy into heat energy. This hot air can be used as a direct heat source for processes such as drying, baking, and melting, thereby improving production efficiency and product quality. Hot blast stoves are widely used in the drying processes of industries such as metal smelting, ore, glass melting, medicinal materials, and tobacco, and can also be used for heating in buildings such as factories and auditoriums and for dehumidifying and warming in places such as underground mining areas.

[0003] However, when traditional hot blast stoves are in use, there are still some problems. Firstly, when traditional hot blast stoves are in use, the waste gas generated is directly discharged. In fact, there is still a small amount of heat in the waste gas, so direct discharge will cause waste. Secondly, once the waste gas is discharged for too long, the filtering effect of the filtering device at the discharge port will become poor, and the discharge efficiency will become low. Therefore, a device for recovering and utilizing the waste heat of hot blast stove waste gas is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for recovering and utilizing the waste heat of hot blast stove waste gas to solve the defects of existing waste heat waste of waste gas and the deterioration of the filtering device effect after long-term use.

[0005] To solve the above technical problems, the utility model provides the following technical solution: A device for recovering and utilizing the waste heat of hot blast stove waste gas includes a furnace body and an air inlet; an air inlet is fixed on one side of the furnace body, a feed inlet is fixed below the air inlet on one side of the furnace body, an ash cleaning chamber is arranged at the bottom of the furnace body, a combustion chamber is arranged at the bottom end inside the furnace body, a heat exchange chamber is fixed on the other side of the furnace body, an exhaust fan is arranged on one side of the top of the furnace body, a smoke pipe is arranged at one end of the exhaust fan, and a disassembly structure is arranged at the other end of the exhaust fan; a heat exchanger is arranged inside the heat exchange chamber, one side of the top of the heat exchanger is connected to an inlet pipe, the other side of the top of the heat exchanger is connected to an outlet pipe, and a blower is installed at the top end of the heat exchange chamber; the disassembly structure includes a rectangular sleeve, activated carbon, and holes. The rectangular sleeve is arranged at the output end of the exhaust fan, activated carbon is arranged inside the rectangular sleeve, and holes are formed on one side of the rectangular sleeve.

[0006] Preferably, internal threads are arranged inside the rectangular sleeve on the side away from the holes, external threads matching the internal threads are arranged on the outer wall of the output end of the exhaust fan, and the rectangular sleeve and the output end of the exhaust fan form a rotating structure through the threads.

[0007] Preferably, three groups of activated carbon are provided, and the activated carbon is evenly distributed inside the rectangular sleeve.

[0008] Preferably, one end of the intake pipe is fixedly connected to the output end of the blower, and the smoke pipe is in a spring shape outside the intake pipe.

[0009] Preferably, one end of the smoke pipe is fixedly connected to one side of the top of the heat exchange chamber, and the other end of the smoke pipe is fixedly connected to the input end of the exhaust fan.

[0010] Preferably, two groups of heat exchangers are provided, and the bottoms of the two groups of heat exchangers are communicated with each other.

[0011] Preferably, a filter plate is provided at the bottom of the combustion chamber, and the combustion chamber is communicated with the ash cleaning chamber through the filter plate.

[0012] An equipment for recovering and utilizing waste heat of waste gas in a hot blast stove provided by the utility model has the following advantages:

[0013] By surrounding the smoke pipe outside the intake pipe, and at the same time the exhaust fan drives the waste gas in the smoke pipe to flow, at this time, some heat remaining in the waste gas in the smoke pipe can be used to preheat the cold air inside the intake pipe, so that when the cold air inside the intake pipe enters the heat exchanger, not only the heating time can be reduced, but also the recovery and reuse effect of the waste heat of the waste gas is achieved.

[0014] Through the rotation cooperation of the disassembly structure and one side of the smoke pipe, when the activated carbon needs to be replaced, it can be quickly disassembled and replaced, avoiding the situation that the filtering effect is affected after the activated carbon has experienced long-term waste gas emission, thereby achieving the effect of quickly disassembling and replacing the activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front sectional structure schematic diagram of the utility model;

[0016] Figure 2 is the top view structure schematic diagram of the utility model;

[0017] Figure 3 is the front view structure schematic diagram of the utility model;

[0018] Figure 4 is the partial sectional structure schematic diagram of the utility model;

[0019] Figure 5 is of the utility model Figure 1 local enlarged structure schematic diagram at A.

[0020] In the figure: 1, furnace body; 2, air inlet; 3, feed inlet; 4, dust cleaning chamber; 5, disassembly structure; 501, rectangular sleeve; 502, activated carbon; 503, hole; 6, exhaust fan; 7, intake pipe; 8, blower; 9, smoke pipe; 10, outlet pipe; 11, heat exchanger; 12, heat exchange chamber; 13, combustion chamber. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] The embodiment of the present invention provides a waste heat recovery and utilization device for hot blast stove exhaust gas, as Figures 1 - 5 shown, an air inlet 2 is fixed on one side of the furnace body 1, a feed inlet 3 is fixed below the air inlet 2 on one side of the furnace body 1, a dust cleaning chamber 4 is arranged at the bottom of the furnace body 1, a combustion chamber 13 is arranged at the bottom end inside the furnace body 1, a heat exchange chamber 12 is fixed on the other side of the furnace body 1, an exhaust fan 6 is arranged on one side of the top of the furnace body 1, a smoke pipe 9 is arranged at one end of the exhaust fan 6, and a disassembly structure 5 is arranged at the other end of the exhaust fan 6; a heat exchanger 11 is arranged inside the heat exchange chamber 12, one side of the top of the heat exchanger 11 is connected to the intake pipe 7, the other side of the top of the heat exchanger 11 is connected to the outlet pipe 10, and a blower 8 is installed at the top end of the heat exchange chamber 12; one end of the intake pipe 7 is fixedly connected to the output end of the blower 8, and the smoke pipe 9 is in a spring shape outside the intake pipe 7; one end of the smoke pipe 9 is fixedly connected to one side of the top of the heat exchange chamber 12, and the other end of the smoke pipe 9 is fixedly connected to the input end of the exhaust fan 6; two groups of heat exchangers 11 are arranged, and the bottoms of the two groups of heat exchangers 11 are communicated; a filter plate is arranged at the bottom of the combustion chamber 13, and the combustion chamber 13 is communicated with the dust cleaning chamber 4 through the filter plate.

[0023] Specifically, in this embodiment: When using the furnace body 1, first put the fuel coal into the combustion chamber 13 from the feed inlet 3, and use the air inlet 2 to inject external air into the interior of the combustion chamber 13. Therefore, when the coal burns, the air inside the furnace body 1 will be heated. The heated high-temperature gas will enter the heat exchange chamber 12. At this time, start the blower 8, and the blower 8 will drive the external air to be injected into the interior of the heat exchanger 11 through the intake pipe 7, so that the cold air inside the intake pipe 7 flows inside the heat exchanger 11. The cold air inside the heat exchanger 11 will use the high-temperature gas inside the heat exchange chamber 12 to conduct a heat exchange on it. After the cold air is heated, it will become high-temperature air inside the heat exchanger 11. The high-temperature air is discharged through the outlet pipe 10 and can be used to perform high-temperature drying on the building materials to be dried. A large amount of waste gas will be discharged through the smoke pipe 9 during the heat exchange process. Since there is still heat in the waste gas, if it is directly discharged, it is easy to cause waste of heat. Therefore, before use, first wind the smoke pipe 9 around the outside of the intake pipe 7, and then start the exhaust fan 6. After the exhaust fan 6 sucks the waste gas inside the heat exchange chamber 12 into the smoke pipe 9, it will be discharged from one side of the smoke pipe 9. The waste gas inside the smoke pipe 9 has heat while flowing. Because a part of the smoke pipe 9 is wound around the outside of the intake pipe 7, the smoke pipe 9 and the intake pipe 7 will have longer contact time, so as to preheat the cold air inside the intake pipe 7, making it faster during heat exchange. When the waste gas after heat exchange is discharged into the interior of the rectangular sleeve 501 from one side of the smoke pipe 9, the activated carbon 502 inside the rectangular sleeve 501 will filter the toxic substances in the waste gas, and the setting of multiple groups of activated carbon 502 makes the filtering effect better, thus completing the utilization work of the waste gas waste heat.

[0024] In a further preferred embodiment of the present invention, as Figures 1 - 5 shown: The disassembly structure 5 includes a rectangular sleeve 501, activated carbon 502 and a hole 503. The rectangular sleeve 501 is arranged at the output end of the exhaust fan 6. The interior of the rectangular sleeve 501 is provided with activated carbon 502. A hole 503 is opened on one side of the rectangular sleeve 501; internal threads are provided inside the rectangular sleeve 501 on the side away from the hole 503, and external threads matching the internal threads are provided on the outer wall of the output end of the exhaust fan 6. The rectangular sleeve 501 and the output end of the exhaust fan 6 form a rotating structure through threads; There are three groups of activated carbon 502, and the activated carbon 502 is evenly distributed inside the rectangular sleeve 501.

[0025] Specifically, in this embodiment: When replacing the activated carbon 502, first hold the rectangular sleeve 501 and rotate it to quickly remove it, and then replace the activated carbon 502 inside it, making it more convenient to replace the activated carbon 502, so as to quickly complete the disassembly and replacement work.

[0026] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for recovering waste heat from waste gas of a hot blast furnace, comprising a furnace body (1) and an air inlet (2); Features: An air inlet (2) is fixed on one side of the furnace body (1), a feed port (3) is fixed below the air inlet (2) on one side of the furnace body (1), an ash cleaning chamber (4) is arranged at the bottom of the furnace body (1), a combustion chamber (13) is arranged at the bottom end of the furnace body (1), a heat exchange chamber (12) is fixed on the other side of the furnace body (1), an exhaust fan (6) is arranged on one side of the top of the furnace body (1), a smoke pipe (9) is arranged at one end of the exhaust fan (6), and a disassembly structure (5) is arranged at the other end of the exhaust fan (6); A heat exchanger (11) is disposed inside the heat exchange chamber (12); one side of the top of the heat exchanger (11) is connected to an air inlet pipe (7), and the other side of the top of the heat exchanger (11) is connected to an air outlet pipe (10); a blower (8) is installed at the top of the heat exchange chamber (12); The disassembly structure (5) comprises a rectangular sleeve (501), activated carbon (502) and a hole (503); the rectangular sleeve (501) is arranged at the output end of the exhaust fan (6); activated carbon (502) is arranged inside the rectangular sleeve (501); and a hole (503) is opened on one side of the rectangular sleeve (501).

2. The hot blast furnace waste heat recovery equipment according to claim 1 is characterized in that: An internal thread is provided on the inner portion of the rectangular sleeve (501) at a side away from the hole (503), and an external thread matching the internal thread is provided on the outer wall of the output end of the exhaust fan (6). The rectangular sleeve (501) and the output end of the exhaust fan (6) form a rotating structure through the thread.

3. The hot blast furnace waste heat recovery equipment according to claim 1 is characterized in that: The activated carbon (502) is provided in three groups, and the activated carbon (502) is distributed at equal intervals inside the rectangular sleeve (501).

4. The hot blast furnace waste heat recovery equipment according to claim 1 is characterized in that: One end of the air inlet pipe (7) is fixedly connected to the output end of the blower (8), and the smoke pipe (9) is in a spring shape on the outside of the air inlet pipe (7).

5. The hot blast furnace waste heat recovery equipment according to claim 1 is characterized in that: One end of the smoke pipe (9) is fixedly connected to one side of the top of the heat exchange chamber (12), and the other end of the smoke pipe (9) is fixedly connected to the input end of the exhaust fan (6).

6. The hot blast furnace waste heat recovery equipment according to claim 1 is characterized in that: The heat exchangers (11) are provided in two groups, and the bottoms of the two groups of heat exchangers (11) are connected.

7. The hot blast furnace waste heat recovery equipment according to claim 1 is characterized in that: A filter plate is provided at the bottom of the combustion chamber (13), and the combustion chamber (13) is connected to the ash cleaning chamber (4) via the filter plate.

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