Industrial smelting furnace with waste gas purification function

Abstract

The utility model relates to the technical field of industrial equipment, in particular to an industrial smelting furnace with a waste gas purification function, which comprises a smelting furnace body used for melting metal and generating flue gas, and further comprises a spray cooling part communicated with a smoke outlet of the smelting furnace body and used for cooling the flue gas, the spray cooling component comprises a furnace body smoke exhaust pipe, a furnace body smoke exhaust pipe and a smoke exhaust pipe, wherein the furnace body smoke exhaust pipe is communicated with a smoke exhaust port of the smelting furnace body and used for leading in smoke; the spraying box is communicated with the furnace body smoke exhaust pipe and is used for accommodating the smoke and the spraying water mist; the pump body is communicated with the water tank and is used for conveying the cooling water to the spraying tank; the transverse pipe is arranged above the spraying box, is communicated with the pump body through a pipeline and is used for conveying the cooling water; in the spraying box, cooling water in the water tank is conveyed to the transverse pipe through the pump body and then sprayed out through the spraying heads to form fine and dense water mist, the high-temperature flue gas makes full contact with the water mist to conduct heat exchange, and therefore rapid cooling is achieved.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment technology, and in particular to an industrial smelting furnace with exhaust gas purification function. Background Technology

[0002] In modern industrial production, metal smelting is a key link in industries such as machinery manufacturing, automobile production, and aerospace. Through metal smelting, various metal raw materials can be melted and cast into the required parts or materials, laying the foundation for the development of various industries.

[0003] However, industrial smelting furnaces generate large amounts of high-temperature flue gas during metal melting, typically reaching temperatures of 800℃-1200℃. This flue gas contains various harmful substances, such as acidic gases like sulfur dioxide and nitrogen oxides, as well as large amounts of heavy metal dust and toxic substances like dioxins. Direct emission of this high-temperature, harmful flue gas without treatment poses a serious threat to the environment and human health. Direct emission of high-temperature flue gas leads to increased local ambient temperature, disrupting the balance of the surrounding ecosystem and adversely affecting the survival and reproduction of plants and animals. The large amount of dust particles carried in the flue gas, especially fine dust, is easily inhaled, and long-term exposure can seriously harm the respiratory health of workers and nearby residents. Furthermore, harmful gases such as sulfur dioxide, nitrogen oxides, and volatile organic compounds (VOCs) in the flue gas are major components of air pollutants; direct emission can lead to environmental problems such as acid rain and photochemical smog, causing severe pollution to the surrounding environment. Therefore, how to effectively treat the high-temperature, highly polluting flue gas generated by industrial smelting furnaces, reduce its temperature, and remove harmful substances is a pressing technical problem that needs to be solved in current industrial production. To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an industrial smelting furnace with waste gas purification function.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an industrial smelting furnace with exhaust gas purification function, comprising a furnace body for melting metal and generating flue gas, and a spray cooling component connected to the exhaust port of the furnace body for cooling the flue gas. The spray cooling component includes: a furnace body exhaust pipe connected to the exhaust port of the furnace body for introducing the flue gas; a spray box connected to the furnace body exhaust pipe for containing the flue gas and spray water mist; a water tank for storing cooling water; and a pump body connected to the water tank for pumping the water... Cooling water is supplied to the spray box; a horizontal pipe, located above the spray box and connected to the pump body via a pipeline, is used to supply the cooling water; a spray head, located inside the spray box and connected to the horizontal pipe, is used to spray the cooling water to form a water mist; a drain hole, located at the bottom of the spray box and connected to the water tank, is used to guide the sprayed water back into the water tank; multiple perforated plates, arranged at equal inclination intervals inside the spray box, are used to extend the residence time of the flue gas in the spray box; a filter component, connected to the spray cooling component, is used to filter and purify the cooled flue gas.

[0006] Furthermore, the filter component includes: a connecting pipe connected to the air outlet of the spray box for introducing cooled flue gas; a filter box disposed at the top of the spray box, with the bottom air inlet of the filter box connected to the connecting pipe; a filter device disposed inside the filter box for filtering harmful substances in the flue gas, the filter device including a ceramic filter screen, a glass fiber filter screen, and an activated carbon filter screen arranged in sequence; and an air outlet pipe connected to the air outlet of the filter box for discharging the filtered and purified flue gas.

[0007] More specifically, a support rod and an inverted conical block are fixedly installed inside the filter box. The support rod supports the inverted conical block, which is positioned above the air outlet of the connecting pipe to diffuse the flue gas entering the filter box.

[0008] Preferably, the bottom of the water tank is equipped with a drain valve.

[0009] Preferably, the top of the water tank is connected to an external tap water pipe.

[0010] Furthermore, the perforated plate has multiple perforations.

[0011] Furthermore, the ceramic filter has a uniform pore structure.

[0012] Furthermore, the activated carbon filter has a microporous structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Inside the spray box, cooling water from the tank is pumped to the horizontal pipe and then sprayed out through the spray nozzles to form a fine water mist. The high-temperature flue gas comes into full contact with the water mist for heat exchange, achieving rapid cooling. The sprayed water flows back to the tank through the drain hole, forming a circulating cooling system. Multiple perforated plates with equal inclination distances inside the spray box force the flue gas to flow meanderingly, prolonging the contact time between the flue gas and the water mist, further improving the cooling effect. After being sprayed and cooled, the flue gas temperature is significantly reduced, and then it enters the filter box of the filtration component through the connecting pipe. Inside the filter box, the flue gas undergoes multi-stage filtration and purification, passing through a ceramic filter, a glass fiber filter, and an activated carbon filter. The ceramic filter effectively intercepts larger dust particles, the glass fiber filter further filters fine dust, and the activated carbon filter efficiently adsorbs harmful gas molecules such as sulfur dioxide, nitrogen oxides, and volatile organic compounds from the flue gas through its microporous structure. After spray cooling and multi-stage filtration, the high temperature, dust, and harmful gases in the flue gas are significantly removed. The purified flue gas is discharged through the exhaust pipe, greatly reducing pollution to the external environment. This technical solution, by combining spray cooling with multi-stage filtration, effectively solves the environmental pollution and health hazards caused by the direct emission of flue gas from existing industrial smelting furnaces, achieving effective flue gas purification and demonstrating significant environmental and social benefits. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a partial sectional view of the present invention.

[0017] Figure 3 This is a schematic diagram of the perforated plate structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the connection between the support rod and the inverted conical block of this utility model.

[0019] In the diagram: 1. Smelting furnace body; 201. Furnace body exhaust pipe; 202. Spray box; 203. Horizontal pipe; 204. Pump body; 205. Drain valve; 206. Water tank; 207. Mesh plate; 208. Spray head; 209. Drain hole; 301. Filter box; 302. Connecting pipe; 303. Gas outlet pipe; 304. Support rod; 305. Inverted conical block; 306. Ceramic filter screen; 307. Glass fiber filter screen; 308. Activated carbon filter screen. Detailed Implementation

[0020] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0021] Modern industrial production, particularly the metal smelting industry, faces severe environmental challenges while driving social development. Traditional industrial smelting furnaces generate large amounts of high-temperature flue gas containing various harmful substances during the smelting process. If this flue gas is emitted directly without effective treatment, it will not only cause air pollution but also seriously harm the surrounding environment and human health. For example, high-temperature flue gas can disrupt the local ecological balance, while dust and harmful gases in the flue gas directly threaten the health of workers and residents. While existing technologies attempt to treat flue gas, they often suffer from incomplete treatment, high energy consumption, or complex equipment, making it difficult to meet increasingly stringent environmental protection requirements. To address the limitations of existing technologies, this application proposes an industrial smelting furnace with waste gas purification capabilities, aiming to provide a solution that can effectively reduce flue gas temperature and remove harmful substances. This solution cleverly combines spray cooling and filtration purification technologies to construct a highly efficient and integrated flue gas treatment system, thereby significantly improving the environmental performance of industrial smelting furnaces.

[0022] like Figures 1 to 4 The industrial smelting furnace shown includes a furnace body 1 for melting metal and generating flue gas, and a spray cooling component connected to the flue gas outlet of the furnace body 1 for cooling the flue gas. The spray cooling component includes: a furnace body exhaust pipe 201 connected to the flue gas outlet of the furnace body 1 for introducing flue gas; a spray box 202 connected to the furnace body exhaust pipe 201 for containing flue gas and spray water mist; a water tank 206 for storing cooling water; a pump body 204 connected to the water tank 206 for transporting cooling water to the spray box 202; and a horizontal pipe 20... 3. A spray nozzle 208 is installed above the spray box 202 and connected to the pump body 204 via a pipe for transporting cooling water; a spray head 208 is installed inside the spray box 202 and connected to the horizontal pipe 203 for spraying cooling water to form a water mist; a drain hole 209 is installed at the bottom of the spray box 202 and connected to the water tank 206 for guiding the sprayed water back into the water tank 206; multiple perforated plates 207 are installed at equal inclination intervals inside the spray box 202 to extend the residence time of flue gas in the spray box 202; and a filter component is connected to the spray cooling component for filtering and purifying the cooled flue gas.

[0023] During use, the top of the exhaust pipe 303 is connected to the external flue gas duct. During the melting process of metal in the smelting furnace 1, the high-temperature flue gas generated enters the spray box 202 through the furnace exhaust pipe 201. Cooling water is pre-filled in the water tank 206. The pump 204 on the side wall of the water tank 206 is activated, and the pump 204 transports the cooling water from the water tank 206 to the horizontal pipe 203 above the spray box 202 through a pipe. The water in the horizontal pipe 203 is then transported to the spray heads 208 inside the spray box 202 and sprayed out, forming a fine water mist. The sprayed water mist fully contacts and exchanges heat with the high-temperature flue gas entering the spray box 202, rapidly cooling the flue gas. Water droplets generated during the cooling process fall to the bottom of the spray box 202 and then enter the water tank 206 through the drain hole 209 connected to the water tank 206, achieving the recycling of the cooling water. Furthermore, the multiple equally spaced perforated plates 207 inside the spray box 202 ensure that the flue gas entering the spray box 202 must pass through the perforations of each plate 207 before entering the connecting pipe 302. This results in a longer residence time for the flue gas within the spray box 202, increasing the contact area and time between the flue gas and the water mist, allowing for more thorough contact and better cooling. As the water circulating into the water tank 206 exchanges heat with the flue gas, the temperature of the water in the water tank 206 gradually increases. After being cooled by the spray, the flue gas enters the filter box 301 at the top of the spray box 202 through the connecting pipe 302 in the filter component. A filtration device is installed inside the filter box 301 to filter and purify the flue gas, removing dust and harmful gases. The filtered flue gas is then discharged through the exhaust pipe 303. Through the above-mentioned spray cooling and filtration purification processes, the temperature and pollutant content of the flue gas generated by the industrial smelting furnace are significantly reduced, thereby greatly reducing the pollution of the external environment by the flue gas and protecting the environment and human health.

[0024] In one embodiment of this utility model, the filter component includes: a connecting pipe 302, connected to the air outlet of the spray box 202, for introducing cooled flue gas; a filter box 301, disposed at the top of the spray box 202, with the bottom air inlet of the filter box 301 connected to the connecting pipe 302; a filter device, disposed inside the filter box 301, for filtering harmful substances in the flue gas, the filter device including a ceramic filter screen 306, a glass fiber filter screen 307, and an activated carbon filter screen 308 arranged in sequence; and an air outlet pipe 303, connected to the air outlet of the filter box 301, for discharging the filtered and purified flue gas.

[0025] During operation, this filtration device employs a multi-stage filtration structure to effectively remove different types of pollutants from flue gas. The ceramic filter 306 typically serves as the first stage of filtration; its porous structure effectively intercepts larger dust particles in the flue gas. The glass fiber filter 307, positioned after the ceramic filter 306, acts as the second stage; its fibrous structure captures even finer dust particles. The activated carbon filter 308, positioned after the glass fiber filter 307, serves as the third stage of filtration. This activated carbon material possesses a well-developed microporous structure and a large specific surface area, enabling it to efficiently remove gaseous pollutants such as sulfur dioxide, nitrogen oxides, and volatile organic compounds from the flue gas through physical and chemical adsorption. This series-linked filtration system ensures that dust and harmful gases in the flue gas are purified layer by layer, improving overall purification efficiency and effectiveness.

[0026] By employing a filtration device consisting of a ceramic filter 306, a glass fiber filter 307, and an activated carbon filter 308 arranged sequentially, the industrial smelting furnace of this application can achieve deep purification of flue gas. Compared with existing technologies that use only a single filter material or a simple combination thereof, this multi-stage filtration structure can more comprehensively remove various pollutants from the flue gas, especially significantly improving the treatment effect on fine dust and gaseous harmful substances, thereby further reducing the pollution of the environment caused by flue gas emissions and enhancing the environmental performance of the equipment.

[0027] In one embodiment of this utility model, a support rod 304 and an inverted conical block 305 are fixedly installed inside the filter box 301. The support rod 304 supports the inverted conical block 305, and the inverted conical block 305 is located above the air outlet of the connecting pipe 302 to diffuse the flue gas entering the filter box 301.

[0028] During operation, the support rod 304 supports the inverted conical block 305, ensuring its stable position within the filter box 301. The inverted conical block 305 is positioned directly above the outlet of the connecting pipe 302. When the flue gas, after being cooled by spraying, enters the filter box 301 through the connecting pipe 302, it first encounters the inverted conical block 305. The conical structure of the inverted conical block 305 effectively disperses the upward-flowing flue gas in all directions, changing its flow direction so that it no longer concentrates and rushes upwards, but rather diffuses into the lateral space of the filter box 301.

[0029] As one embodiment of this utility model, a drain valve 205 is provided at the bottom of the water tank 206; the drain valve 205 is a valve for controlling the discharge of liquid, which is located at the lowest point of the water tank 206 so that the liquid in the water tank 206 can be completely or partially discharged.

[0030] As one embodiment of this utility model, the top of the water tank 206 is connected to an external tap water pipe.

[0031] As one embodiment of this utility model, the perforated plate 207 has multiple mesh holes.

[0032] In one embodiment of this utility model, the ceramic filter screen 306 has a uniform pore structure. By employing a ceramic filter screen 306 with a uniform pore structure, this application can more stably and efficiently filter out larger dust particles in flue gas. This uniformity ensures consistent filtration performance, reduces the risk of clogging, and improves the service life of the filter screen.

[0033] In one embodiment of this invention, the activated carbon filter 308 has a microporous structure. By employing the activated carbon filter 308 with a microporous structure, this application can efficiently adsorb gaseous harmful substances such as sulfur dioxide, nitrogen oxides, and volatile organic compounds in flue gas. This microporous structure provides a huge adsorption surface area, enabling the effective capture of harmful gas molecules and achieving deep purification of the flue gas.

[0034] Working principle of this utility model:

[0035] In use, the top of the exhaust pipe 303 is connected to the external flue gas pipe. During the melting process of metal in the furnace body 1, the flue gas generated enters the spray box 202 through the furnace body exhaust pipe 201 in the spray cooling component. Cooling water is added to the water tank 206. The pump body 204 on the side wall of the water tank 206 is started. The pump body 204 transports the cooling water in the water tank 206 to the horizontal pipe 203 above the spray box 202 through the pipe. The water in the horizontal pipe 203 is then transported to the spray head 208 inside the spray box 202 and sprayed out. The sprayed water mist comes into contact with the flue gas entering the spray box 202 for heat exchange, cooling the flue gas. The falling water then drains through the drain hole connected to the water tank 206. The flue gas enters the water tank 206 through multiple equally spaced perforated plates 207 inside the spray box 202. This allows the flue gas to pass through the perforations of each plate 207 before entering the connecting pipe 302, thus increasing the residence time of the flue gas in the spray box 202 and enabling it to come into more complete contact with the water mist to achieve the purpose of cooling. As the water circulating into the water tank 206 exchanges heat with the flue gas, the temperature of the water in the water tank 206 will rise. This water can then be drained by opening the drain valve 205 to replace the next batch of cooling water. The top of the water tank 206 is connected to an external tap water pipe for easy addition of cooling water to the water tank 206.

[0036] After being cooled by spraying, the flue gas enters the filter box 301 at the top of the spray box 202 through the connecting pipe 302 in the filter component. Upon entering the filter box 301, the support rod 304 supports the inverted conical block 305, which diffuses the flue gas, allowing it to contact the ceramic filter screen 306. This increases the contact area between the flue gas and the ceramic filter screen 306, improving the filtration range. The flue gas filtered by the ceramic filter screen 306 then passes through a glass fiber filter screen 307, and then through an activated carbon filter screen 308 for adsorption filtration. When the flue gas passes through the ceramic filter screen 306, due to the ceramic... The filter screen 306 has a uniform pore structure, preventing larger dust particles from passing through the pores, thus filtering out larger dust particles in the flue gas. The glass fiber filter screen 307 filters out fine dust particles in the flue gas. After the first two stages of filtration, most of the dust in the flue gas is removed. The activated carbon filter screen 308 adsorbs harmful gases such as sulfur dioxide, nitrogen oxides, and volatile organic compounds (VOCs) in the flue gas. These harmful gas molecules are captured in the micropores of the activated carbon, thereby achieving deep purification of the flue gas. The filtered flue gas is then discharged through the exhaust pipe 303, greatly reducing the pollution of the external environment by the flue gas.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.

Claims

1. An industrial smelting furnace with exhaust gas purification function, comprising a furnace body (1) for melting metal and generating flue gas, characterized in that, Also includes: A spray cooling component is connected to the exhaust port of the smelting furnace body (1) and is used to cool the flue gas. The spray cooling component includes: The furnace body exhaust pipe (201) is connected to the exhaust port of the furnace body (1) of the smelting furnace and is used to introduce the flue gas; The spray box (202) is connected to the flue gas pipe (201) of the furnace body and is used to contain the flue gas and spray water mist; A water tank (206) is used to store cooling water; a pump body (204) is connected to the water tank (206) and is used to transport the cooling water to the spray box (202). A horizontal pipe (203) is installed above the spray box (202) and is connected to the pump body (204) through a pipe for transporting the cooling water; A spray head (208) is disposed inside the spray box (202) and communicates with the horizontal pipe (203) for spraying the cooling water to form a water mist; A drain hole (209) is provided at the bottom of the spray box (202) and communicates with the water tank (206) to guide the sprayed water back into the water tank (206); Multiple perforated plates (207) are arranged at equal inclination intervals inside the spray box (202) to extend the residence time of the flue gas in the spray box (202); The filter component is connected to the spray cooling component and is used to filter and purify the cooled flue gas.

2. The industrial smelting furnace with exhaust gas purification function according to claim 1, characterized in that, The filter component includes: a connecting pipe (302) connected to the air outlet of the spray box (202) for introducing cooled flue gas; A filter box (301) is located on top of the spray box (202), and the bottom air inlet of the filter box (301) is connected to the connecting pipe (302); A filtration device is installed inside the filter box (301) for filtering harmful substances in the flue gas. The filtration device includes a ceramic filter screen (306), a glass fiber filter screen (307), and an activated carbon filter screen (308) arranged in sequence. The exhaust pipe (303) is connected to the exhaust port of the filter box (301) and is used to discharge the filtered and purified flue gas.

3. The industrial smelting furnace with exhaust gas purification function according to claim 2, characterized in that, The filter box (301) is fixedly provided with a support rod (304) and an inverted cone block (305). The support rod (304) supports the inverted cone block (305). The inverted cone block (305) is located above the air outlet of the connecting pipe (302) and is used to diffuse the flue gas entering the filter box (301).

4. The industrial smelting furnace with exhaust gas purification function according to claim 1, characterized in that, The bottom of the water tank (206) is provided with a drain valve (205).

5. The industrial smelting furnace with exhaust gas purification function according to claim 4, characterized in that, The top of the water tank (206) is connected to an external tap water pipe.

6. The industrial smelting furnace with exhaust gas purification function according to claim 1, characterized in that, The perforated plate (207) has multiple perforations.

7. The industrial smelting furnace with exhaust gas purification function according to claim 2, characterized in that, The ceramic filter (306) has a uniform pore structure.

8. The industrial smelting furnace with exhaust gas purification function according to claim 2, characterized in that, The activated carbon filter (308) has a microporous structure.

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