A plasma melting furnace that uses negative pressure inside the furnace to extract dust from the furnace mouth

Abstract

The utility model relates to the technical field of melting furnaces, and in particular to a plasma melting furnace which utilizes negative pressure in the furnace to extract dust from a furnace mouth, comprising a melting furnace body, a flue assembly being arranged on the side of the melting furnace body, and a top assembly being arranged on the top of the melting furnace body. By arranging the flue assembly, since the melting furnace body is made by thermal plasma technology, the furnace temperature is high, the combustion is fast, the residence time is short, and the efficiency is high, thereby realizing the resource utilization of wastes. The water-cooled flue is short and not easy to accumulate dust. The water-cooled flue has a quick-opening ash cleaning port, which is convenient for ash cleaning and maintenance. By arranging the top assembly, the melting furnace cover plate adopts fixing bolts to fix the connecting plate and the rectangular plate, so that the melting furnace cover plate and the melting furnace body are quickly and simply positioned, and the installation is convenient, and the disassembly and maintenance are convenient. The melting furnace body also has the advantages of stable and reliable operation, low energy consumption, low cost, long service life, good sealing, simple maintenance, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of melting furnaces, in particular to a plasma melting furnace which utilizes negative pressure inside the furnace to extract dust from a furnace opening. Background Art

[0002] Industrial hazardous wastes are distributed in different industries, mainly in the chemical raw materials and chemical products manufacturing industry, non-ferrous metal smelting and mining, non-metallic mineral mining and other industries. When hazardous wastes are not properly handled, they will pose a serious threat to nature and human health.

[0003] There are still some deficiencies in the prior art. The existing plasma furnace smoke outlet is prone to dust accumulation and is difficult to clean. The existing plasma furnace does not have dust removal when it comes out of the furnace, and a large amount of smoke pollutes the environment when it comes out of the furnace. The existing plasma furnace cover is installed and positioned with bolts, which are difficult to install and position, and difficult to disassemble. Utility Model Content

[0004] The utility model aims to provide a plasma melting furnace which utilizes negative pressure inside the furnace to extract dust from the furnace mouth, so as to solve the problems mentioned in the above background technology that the smoke outlet of the existing plasma furnace is easy to accumulate dust and is difficult to clean, the existing plasma furnace has no furnace dust removal, and a large amount of smoke pollutes the environment when it is out of the furnace, and the existing plasma furnace cover is installed and positioned with bolts, which is difficult to install and position, and difficult to disassemble.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A plasma melting furnace for extracting dust from a furnace mouth by using negative pressure in the furnace, comprising a melting furnace body, a flue assembly is arranged on the side of the melting furnace body, and a top assembly is arranged on the top of the melting furnace body;

[0007] The flue assembly comprises a water-cooled flue on the side of the melting furnace body, a ash cleaning port is provided on the side of the water-cooled flue, a sealing door is provided in the ash cleaning port, the sealing door is rotatably connected to the water-cooled flue through a connecting hinge, a connecting handle is fixedly connected to the side of the sealing door, a furnace outlet smoke hood is fixedly connected to the side of the melting furnace body, a furnace outlet smoke hood is fixedly connected to the side of the furnace outlet flue, a terminal of the furnace outlet flue is fixedly connected to the water-cooled flue through a connecting flange, and a flue air valve is fixedly connected to the outer surface of the furnace outlet flue;

[0008] The top component includes a melting furnace cover plate on the top of the melting furnace body, a fixing plate is fixedly connected to the bottom of the melting furnace cover plate, a connecting plate is fixedly connected to the top of the melting furnace body, a rectangular plate is fixedly connected to the top of the fixing plate, the rectangular plate and the connecting plate are positioned opposite to each other, a fixing bolt is arranged on the top of the rectangular plate, the fixing bolt passes through the rectangular plate and extends to the bottom of the connecting plate, and the fixing bolt is threadedly connected to the rectangular plate.

[0009] As a preferred solution of the utility model, the end of the fixing bolt is threadedly connected with a fixing nut, and the fixing nut abuts against the connecting plate.

[0010] As a preferred solution of the utility model, the sides of the melting furnace body are respectively fixedly connected with a slurry outlet and an iron outlet, and the iron outlet is located at the bottom of the slurry outlet.

[0011] As a preferred solution of the utility model, a pulp outlet fume hood is fixedly connected to the side of the melting furnace body, and the pulp outlet fume hood is made of stainless steel.

[0012] As a preferred solution of the utility model, a mounting plate is fixedly connected to the bottom of the melting furnace body, and the mounting plate is opposite to the melting furnace cover plate.

[0013] As a preferred solution of the utility model, the melting furnace body is made by thermal plasma technology, and the average temperature inside the melting furnace body is 1500°C.

[0014] As a preferred solution of the utility model, a connecting pipe is fixedly connected to the top of the melting furnace cover plate, and a sealing cover is clamped on the top of the connecting pipe.

[0015] As a preferred solution of the utility model, two fixing bolts are provided, and the two fixing bolts are located opposite to each other.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. In the utility model, by setting the flue assembly, since the melting furnace body is made of thermal plasma technology, the furnace temperature is high, the combustion is fast, the residence time is short, the efficiency is high, and the processed materials can reach high temperature in an instant. At the same time, the environmental protection standard is high, no highly toxic substances such as dioxins are produced, and secondary pollution to the human body and the environment is avoided. The whole set of equipment is miniaturized and has a relatively simple structure. The device is easy to operate, the startup and shutdown are fast, and all automatic control can be achieved, so the operation is safe and reliable. At the same time, the reduction and harmlessness of waste are achieved to the greatest extent. The thermal plasma technology enables organic matter to be quickly dehydrated, pyrolyzed and cracked. The plasma melting furnace can form a stable glass solid body, which can be used as building materials or other after passing the test, thereby realizing the resource utilization of waste. The water-cooled flue is short and not easy to accumulate dust. The water-cooled flue has a quick-opening cleaning port, which is convenient for cleaning and maintenance.

[0018] 2. In the utility model, by setting the top assembly, the melting furnace cover plate uses fixing bolts to fix the connecting plate and the rectangular plate, so that the melting furnace cover plate and the melting furnace body are quickly and simply positioned, easy to install, and easy to disassemble and repair. At the same time, the slurry outlet is provided with a slurry outlet smoke hood, and the negative pressure of the flue gas outlet flue is used for dust collection. There is no need to configure a separate furnace dust removal, which is energy-saving and environmentally friendly. The melting furnace generates energy by plasma arc, and there is no stirring effect on the dust in the furnace. The melting furnace body also has the advantages of stable and reliable operation, low energy consumption, low cost, long life, good sealing, and simple maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the top structure of the melting furnace body of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the flue assembly of the utility model;

[0021] Figure 3 This is a schematic diagram of the top component structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the pulp outlet structure of the utility model.

[0023] In the figure: 1. melting furnace body; 2. flue assembly; 201. water-cooled flue; 202. ash cleaning port; 203. sealing door; 204. connecting hinge; 205. connecting handle; 3. top assembly; 301. melting furnace cover; 302. fixing plate; 303. connecting plate; 304. rectangular plate; 305. fixing bolt; 306. fixing nut; 4. furnace outlet smoke hood; 5. flue air valve; 6. furnace outlet flue; 7. connecting flange; 8. slurry outlet smoke hood; 9. slurry outlet; 10. iron outlet; 11. mounting plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] For examples, see Figure 1-Figure 4 , the utility model provides a technical solution:

[0026] A plasma melting furnace which utilizes negative pressure inside the furnace to extract dust from a furnace mouth comprises a melting furnace body 1, a flue assembly 2 is arranged on the side of the melting furnace body 1, and a top assembly 3 is arranged on the top of the melting furnace body 1.

[0027] In this embodiment, according to Figure 1 and Figure 2 As shown, the flue assembly 2 includes a water-cooled flue 201 on the side of the melting furnace body 1, a cleaning port 202 is opened on the side of the water-cooled flue 201, a sealing door 203 is arranged in the cleaning port 202, the sealing door 203 is rotatably connected to the water-cooled flue 201 through a connecting hinge 204, a connecting handle 205 is fixedly connected to the side of the sealing door 203, a furnace outlet smoke hood 4 is fixedly connected to the side of the melting furnace body 1, a furnace outlet smoke hood 4 is fixedly connected to the side of the furnace outlet smoke hood 4, a furnace outlet flue 6 is fixedly connected to the end of the furnace outlet flue 6 through a connecting flange 7, a flue air valve 5 is fixedly connected to the outer surface of the furnace outlet flue 6, a slurry outlet smoke hood 8 is fixedly connected to the side of the melting furnace body 1, the slurry outlet smoke hood 8 is made of stainless steel, the melting furnace body 1 is made of thermal plasma technology, and the average temperature in the melting furnace body 1 is 1500°C.

[0028] Among them, the water-cooled flue 201 is cleaned by opening the sealed door 203. Due to the high furnace temperature, fast combustion, short residence time and high efficiency, the processed materials can reach high temperature in an instant; the environmental protection standard is high, no highly toxic substances such as dioxins are produced, and secondary pollution to the human body and the environment is avoided.

[0029] In this embodiment, according to Figure 1 , Figure 3 and Figure 4As shown, the top component 3 includes a melting furnace cover plate 301 on the top of the melting furnace body 1, a fixing plate 302 is fixedly connected to the bottom of the melting furnace cover plate 301, a connecting plate 303 is fixedly connected to the top of the melting furnace body 1, a rectangular plate 304 is fixedly connected to the top of the fixing plate 302, the rectangular plate 304 is opposite to the connecting plate 303, a fixing bolt 305 is arranged on the top of the rectangular plate 304, the fixing bolt 305 passes through the rectangular plate 304 and extends to the bottom of the connecting plate 303, the fixing bolt 305 is threadedly connected to the rectangular plate 304, and the fixing bolt 305 is threadedly connected to the rectangular plate 304. The end of the bolt 305 is threadedly connected with a fixing nut 306, and the fixing nut 306 abuts against the connecting plate 303. The sides of the melting furnace body 1 are respectively fixedly connected with a slurry outlet 9 and an iron outlet 10, and the iron outlet 10 is located at the bottom of the slurry outlet 9. The bottom of the melting furnace body 1 is fixedly connected with a mounting plate 11, and the mounting plate 11 is opposite to the melting furnace cover plate 301. The top of the melting furnace cover plate 301 is fixedly connected with a connecting pipe 12, and a sealing cover is clamped on the top of the connecting pipe 12. Two fixing bolts 305 are provided, and the two fixing bolts 305 are opposite to each other.

[0030] Among them, since the melting furnace cover plate 301 uses fixing bolts 305 to fix the connecting plate 303 and the rectangular plate 304, the melting furnace cover plate 301 and the melting furnace body 1 are quickly and simply positioned, easy to install, and easy to disassemble and repair.

[0031] The working process of the utility model: when the plasma melting furnace designed by the scheme is used to extract the dust at the furnace mouth by the negative pressure in the furnace, first check whether the device is used normally, install the device in a suitable working area, and place the waste materials in the melting furnace body 1. Since the melting furnace body 1 is made of thermal plasma technology, the temperature of ordinary incinerators is about 800°C, and the furnace temperature is inevitably lower than 700°C when starting to ignite, feeding in the middle, and shutting down. The temperature of the arc center of the ion furnace in the melting furnace body 1 is as high as 3500~4200°C, and the average temperature in the furnace is 1500°C. Due to the high furnace temperature, fast combustion, short residence time and high efficiency, the processed materials can reach high temperature in an instant; the environmental protection standard is high, no highly toxic substances such as dioxins are produced, and secondary pollution to the human body and the environment is avoided. The thermal plasma technology for treating hazardous waste is greatly different from the incineration method. First of all, the principles are different. Incineration is an oxygen-rich combustion process that requires a continuous supply of air. The temperature in the furnace is generally lower than 900°C, while plasma technology is an oxygen-deficient pyrolysis process that does not require additional oxygen. The average temperature in the furnace can reach above 1500°C. Secondly, the difference lies in the main products. The products of incineration are flue gas, slag and fly ash, and the products of plasma technology are usually low calorific value synthesis gas and vitreous hot molten slag. Thermal plasma technology has unique advantages. The sealed door 203 is opened to clean the water-cooled flue 201. Since the melting furnace cover 301 uses fixing bolts 305 to fix the connecting plate 303 and the rectangular plate 304, the melting furnace cover 301 and the melting furnace body 1 are quickly and easily positioned, easy to install, and easy to disassemble and repair.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plasma melting furnace for extracting dust from a furnace outlet by using negative pressure inside the furnace, comprising a melting furnace body (1), characterized in that: A flue assembly (2) is provided on the side of the melting furnace body (1), and a top assembly (3) is provided on the top of the melting furnace body (1); The flue assembly (2) comprises a water-cooled flue (201) on the side of the melting furnace body (1); a ash cleaning port (202) is provided on the side of the water-cooled flue (201); a sealing door (203) is provided in the ash cleaning port (202); the sealing door (203) is rotatably connected to the water-cooled flue (201) via a connecting hinge (204); a connecting handle (205) is fixedly connected to the side of the sealing door (203); a furnace outlet smoke hood (4) is fixedly connected to the side of the melting furnace body (1); a furnace outlet smoke hood (4) is fixedly connected to the side of the furnace outlet smoke hood (4); a furnace outlet flue (6) is fixedly connected to the end of the furnace outlet flue (6) via a connecting flange (7); and a flue air valve (5) is fixedly connected to the outer surface of the furnace outlet flue (6); The top component (3) comprises a melting furnace cover plate (301) at the top of the melting furnace body (1); a fixing plate (302) is fixedly connected to the bottom of the melting furnace cover plate (301); a connecting plate (303) is fixedly connected to the top of the melting furnace body (1); a rectangular plate (304) is fixedly connected to the top of the fixing plate (302); the rectangular plate (304) and the connecting plate (303) are positioned opposite each other; a fixing bolt (305) is provided at the top of the rectangular plate (304); the fixing bolt (305) passes through the rectangular plate (304) and extends to the bottom of the connecting plate (303); and the fixing bolt (305) is threadedly connected to the rectangular plate (304).

2. A plasma melting furnace for extracting dust from the furnace outlet by using negative pressure in the furnace according to claim 1, characterized in that: The end of the fixing bolt (305) is threadedly connected to a fixing nut (306), and the fixing nut (306) abuts against the connecting plate (303).

3. The plasma melting furnace for extracting dust from the furnace outlet by using negative pressure in the furnace according to claim 1, characterized in that: A slurry outlet (9) and an iron outlet (10) are respectively fixedly connected to the side surfaces of the melting furnace body (1), and the iron outlet (10) is located at the bottom of the slurry outlet (9).

4. The plasma melting furnace for extracting dust from the furnace outlet by using negative pressure in the furnace according to claim 1, characterized in that: A pulp discharge fume hood (8) is fixedly connected to the side of the melting furnace body (1), and the pulp discharge fume hood (8) is made of stainless steel.

5. The plasma melting furnace for extracting dust from the furnace outlet by using negative pressure in the furnace according to claim 1, characterized in that: A mounting plate (11) is fixedly connected to the bottom of the melting furnace body (1), and the mounting plate (11) is located opposite to the melting furnace cover plate (301).

6. The plasma melting furnace for extracting dust from the furnace outlet by using negative pressure in the furnace according to claim 1, characterized in that: The melting furnace body (1) is made by thermal plasma technology, and the average temperature inside the melting furnace body (1) is 1500°C.

7. The plasma melting furnace for extracting dust from the furnace outlet by using negative pressure in the furnace according to claim 1, characterized in that: A connecting pipe (12) is fixedly connected to the top of the melting furnace cover plate (301), and a sealing cover is clamped on the top of the connecting pipe (12).

8. The plasma melting furnace for extracting dust from the furnace outlet by using negative pressure in the furnace according to claim 1, characterized in that: Two fixing bolts (305) are provided, and the two fixing bolts (305) are located opposite to each other.

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