Flue gas energy-saving treatment device for electric melting furnace

Abstract

The utility model discloses an energy-saving flue gas treatment device for an electric melting furnace, and relates to the technical field of flue gas treatment of electric melting furnaces. The device comprises a base and further comprises a purification box arranged on one side of the top of the base, a heat exchange box is arranged on the other side of the top of the base, a smoke inlet flue is connected to one side of the top of the heat exchange box in an inserted mode, and a liquid level meter is arranged at the front end of the heat exchange box. The spraying dust-settling assembly is arranged on the other side of the purifying box, water in the purifying box is pumped out through the pump machine during use, impurities in the filter cover are used for filtering, the situation that the impurities are sucked into the pump machine and attached to an impeller for a long time, and normal operation of the pump machine is affected is avoided, the impurities are conveyed into the annular spraying pipe through the conveying pipe, and the water purifying efficiency is improved. And then the flue gas which is fused with the water body and absorbs impurities is further absorbed and subjected to dust falling treatment under spraying of the spraying opening, so that the flue gas treatment effect of the device by utilizing a liquid absorption method is further improved, and the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electric smelting furnace flue gas treatment technical field, especially, relate to a kind of flue gas energy-saving treatment device for electric smelting furnace. BACKGROUND

[0002] Electric smelting furnace is a kind of equipment that is widely used in metallurgy, machining, electronics, chemical industry and other fields to heat metal or other materials to molten state using electric energy, and electric smelting furnace will produce a large amount of harmful flue gas containing pollutants such as smoke dust, sulfur dioxide and nitrogen oxides when working, which can easily pollute the atmosphere if directly discharged, so it is necessary to use flue gas energy-saving treatment device to further purify the flue gas discharged during the operation of electric smelting furnace.

[0003] As disclosed in the utility model with the authorized announcement number CN220472332U, a flue gas treatment device for electric smelting furnace includes a purification tank, the bottom of the purification tank is fixedly connected with a base, the bottom of the left side of the purification tank is communicated with an air inlet pipe, and the surface of the air inlet pipe is sleeved with a temperature insulation shell. The heat absorption pipe can absorb the heat on the surface of the air inlet pipe, then the heat is transferred to the water inlet pipe through the heat conducting column, then cold water is introduced into the water inlet pipe to absorb the heat of the heat conducting column, thereby forming a heat convection phenomenon, and the flue gas can be cooled down. At this time, the water after heat absorption can be reused to improve the heat utilization efficiency of high-temperature waste heat in the flue gas, thereby achieving the effect of energy saving and emission reduction. Then, the cooled flue gas is purified and filtered by the purification liquid and the filter bag, so that it can meet the emission standard and be discharged through the discharge port. However, in the application process of this technical solution, the flue gas is directly discharged through the filter bag after being purified by the purification liquid in the device, and a large amount of bubbles will be generated after the flue gas enters the purification liquid. The flue gas in the bubbles cannot be fully mixed with the purification liquid, which has the technical problems of poor purification effect and inability to further spray dust and purify the flue gas. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a flue gas energy-saving treatment device for electric smelting furnace, which can effectively solve the problems of the prior art.

[0005] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a kind of flue gas energy-saving treatment devices for electric smelting furnace, including base, further include: the top of the base one side is provided with purification tank, the top of the base other side is provided with heat exchange tank, the top of the heat exchange tank one side is inserted with inlet flue, the front end of the heat exchange tank is provided with liquid level meter, the bottom of the heat exchange tank one side and the bottom of the purification tank one side are inserted with communication pipe, the inside of the communication pipe is provided with one-way valve, the inside of the heat exchange tank is provided with heat exchange structure, the inside top of the purification tank is provided with exhaust passage on both sides, the inside of the exhaust passage is provided with negative pressure fan, the inside of the purification tank is provided with agitating mechanism, the top of the purification tank both sides is provided with support cylinder, the inside of the support cylinder is provided with filter bag, the top of the purification tank other side is inserted with water replenishing valve, the bottom of the purification tank other side is inserted with blowdown valve, the communication pipe one side of the inside bottom of the purification tank is provided with aeration pipe, the top of the aeration pipe is provided with aeration spout, the position of the purification tank other side close to middle is provided with fixed seat, the top of the fixed seat is provided with pump, the output end of the pump is provided with delivery pipe, the position of the purification tank other side close to bottom is inserted with water suction pipe, the inside of the purification tank one side of water suction pipe is provided with filter cover, the position of the inside side wall of the purification tank close to top is provided with spout pipe, the bottom of the spout pipe is provided with spray opening, the bottom of the support cylinder and the top of the purification tank are provided with dismounting assembly between.

[0007] Further, the top of the water suction pipe is fixedly connected with the inside top of the fixed seat and the input end of the pump, the top of the delivery pipe is fixedly connected with the other side of the purification tank and the one side of the spout pipe, the spout pipe is annular, and the spray openings are arranged at the bottom end of the spout pipe at equal intervals.

[0008] Further, the heat exchange structure comprises heat exchange pipes, the heat exchange pipes are arranged in the heat exchange tank, the heat exchange pipes are serpentine, the top of the heat exchange pipes is fixedly connected with the bottom of the inlet flue and communicated, the bottom of the heat exchange pipes is fixedly connected with the one side of the communication pipe and communicated, the top of the one side of the heat exchange tank is inserted with water inlet, and the bottom of the one side of the heat exchange tank is inserted with water outlet.

[0009] Further, the agitating mechanism comprises an agitating frame, the agitating frame is arranged in the purification tank, a driving motor is arranged at the middle position of the top of the purification tank, a shaft sleeve is inserted at the middle position of the inside top of the purification tank, and the top of the agitating frame is connected with the output end of the driving motor through the shaft sleeve.

[0010] Further, the dismounting assembly comprises a mounting seat, the mounting seat is arranged at the both sides of the top of the purification tank, a limiting sheet is arranged at the bottom of the outside of the support cylinder, and a sealing gasket is arranged at the bottom of the limiting sheet.

[0011] Further, the mounting seat corresponds to the exhaust passage, the inner side of the mounting seat is provided with an internal thread, the bottom of the outer side of the supporting cylinder is provided with an external thread matched with the internal thread, and the limiting piece and the sealing gasket are annular.

[0012] The utility model has the following beneficial effects:

[0013] The utility model discloses a dust falling assembly is arranged on the other side of the purification tank, and when using, the water in the purification tank is pumped out through the pump, and the impurities in the filter cover are filtered out, so that the impurities are prevented from being sucked into the pump and adhered to the impeller, which influences the normal operation of the pump, and the impurities in the water are absorbed, and the flue gas is further absorbed and dusted through the spray nozzle, so that the effect of treating the flue gas by using the liquid absorption method is improved, and the device has high practicability.

[0014] The utility model discloses a dismounting assembly is arranged between the bottom of the supporting cylinder and the top of the purification tank, the supporting cylinder is installed in the inner side of the mounting seat through threaded connection when using, and the installation depth is limited through the annular limiting piece, and the connecting place is sealed through the sealing gasket, so that the supporting cylinder and the filter bag arranged in the supporting cylinder are positioned and installed on the top of the exhaust passage, and the supporting cylinder can be dismounted by reverse screwing, so that the filter bag can be conveniently cleaned or replaced to ensure the filtering effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0016] Figure 1 It is a perspective structure schematic diagram of the utility model;

[0017] Figure 2 It is a front view cross section structure schematic diagram of the utility model;

[0018] Figure 3 It is the utility model's Figure 2 It is the enlarged structure schematic diagram of A place in the utility model;

[0019] Figure 4 It is the supporting cylinder three-dimensional structure schematic diagram of the utility model.

[0020] In the drawings, the component list represented by each sign is as follows:

[0021] 1. Base; 2. Purification box; 3. Connecting pipe; 4. Heat exchange box; 5. Outlet; 6. Level gauge; 7. Inlet; 8. Flue; 9. Mounting base; 10. Support cylinder; 11. Drive motor; 12. Water supply valve; 13. Delivery pipe; 14. Pump; 15. Fixing base; 16. Pumping pipe; 17. Drain valve; 18. Aeration pipe; 19. Aeration nozzle; 20. Check valve; 21. Heat exchange pipe; 22. Spray pipe; 23. Negative pressure fan; 24. Exhaust duct; 25. Agitator; 26. Spray nozzle; 27. Filter cover; 28. Filter bag; 29. ​​Bushing; 30. Limiting plate; 31. Sealing gasket. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figures 1-4As shown, this utility model is an energy-saving device for flue gas treatment of an electric furnace, including a base 1, and further including: a purification box 2 is provided on one side of the top of the base 1, and a heat exchange box 4 is provided on the other side of the top of the base 1. A flue duct 8 is inserted into one side of the top of the heat exchange box 4. When using the device, the flue duct 8 is connected to the exhaust pipe of the electric furnace. A level gauge 6 is provided at the front end of the heat exchange box 4. A connecting pipe 3 is inserted between the bottom of one side of the heat exchange box 4 and the bottom of one side of the purification box 2. A one-way valve 20 is provided inside the connecting pipe 3. A serpentine heat exchange tube 21 is provided inside the heat exchange box 4. The top end of the heat exchange tube 21 is fixedly connected to the bottom of the flue duct 8 and is in communication with it. The bottom end of the heat exchange tube 21 is fixedly connected to one side of the connecting pipe 3 and is in communication with it. A water inlet 7 is inserted into the top of one side of the heat exchange box 4, and a water outlet 5 is inserted into the bottom of one side of the heat exchange box 4. High-temperature flue gas is introduced into the heat exchange tube 21 inside the heat exchange box 4 through the flue duct 8. At the same time, cold water is introduced into the heat exchange box 4 through the water inlet 7. The cold water is heated by the residual heat of the flue gas, and the hot water is discharged through the water outlet 5 for use. An aeration pipe 18 is installed on one side of the connecting pipe 3 at the bottom of the purification box 2. A water outlet 5 is installed at the top of the aeration pipe 18. Aeration nozzle 19 is used to circulate and cool the flue gas in the heat exchange tube 21. The flue gas is then fed into the aeration pipe 18 through the connecting pipe 3 and sprayed out through the aeration nozzle 19 into the water in the purification tank 2 to mix with and settle impurities. Exhaust ducts 24 are provided on both sides of the top of the purification tank 2. A negative pressure fan 23 is installed inside the exhaust ducts 24. An agitator 25 is installed inside the purification tank 2. A drive motor 11 is located in the middle of the top of the purification tank 2. A bushing 29 is inserted into the middle of the top of the purification tank 2. The top of the agitator 25 passes through the bushing 29 and connects to the output end of the drive motor 11. When the flue gas and water are mixed, the drive motor 11 is started to drive the agitator 25 to rotate so that it can mix with the water faster and more completely. Support cylinders 10 are set on both sides of the top of the purification box 2. Filter bags 28 are set inside the support cylinders 10. Then, the flue gas after being mixed with water and removed by the negative pressure fan 23 is discharged into the filter bags 28 through the exhaust duct 24 for further filtration and purification. A water supply valve 12 is inserted into the top of the other side of the purification box 2, and a drain valve 17 is inserted into the bottom of the other side of the purification box 2. Water is added to the purification box 2 through the water supply valve 12, and wastewater is discharged through the drain valve 17.

[0024] As a further implementation of this embodiment, such as Figure 1 and Figure 2As shown, a fixed base 15 is provided on the other side of the purification box 2 near the middle. A pump 14 is installed on the top of the fixed base 15, and a delivery pipe 13 is provided at the output end of the pump 14. A water suction pipe 16 is inserted into the other side of the purification box 2 near the bottom. The top end of the water suction pipe 16 passes through the inner top of the fixed base 15 and is fixedly connected to the input end of the pump 14. A filter cover 27 is provided inside the purification box 2 on one side of the water suction pipe 16. An annular spray pipe 22 is provided on the inner side wall of the purification box 2 near the top. The top end of the delivery pipe 13 passes through the other side of the purification box 2 and is fixedly connected to one side of the spray pipe 22. When the flue gas and water merge and rise, the pump 14 is activated to extract the water from the purification tank 2. At the same time, impurities in the filter cover 27 are filtered out to prevent them from being sucked into the pump 14 and adhering to the impeller, which would affect the normal operation of the pump 14 in the long run. The water is then transported through the delivery pipe 13 to the annular spray pipe 22. The bottom of the spray pipe 22 is provided with spray nozzles 26, which are arranged at equal intervals at the bottom of the spray pipe 22. The flue gas that has merged with the water and absorbed impurities is then sprayed through the spray nozzles 26 to further absorb and reduce dust, thereby further improving the effect of the device in treating flue gas using the liquid absorption method.

[0025] During use, the water in the purification tank 2 is drawn out by the pump 14, and the impurities in the filter cover 27 are filtered out to prevent the impurities from being sucked into the pump 14 and adhering to the impeller, which would affect the normal operation of the pump 14 in the long run. The water is then transported to the annular spray pipe 22 through the delivery pipe 13, and then sprayed through the spray nozzle 26 to further absorb and reduce dust in the flue gas after it has absorbed impurities and mixed with the water.

[0026] As a further implementation of this embodiment, such as Figures 1-4 As shown, a disassembly assembly is provided between the bottom of the support cylinder 10 and the top of the purification box 2. The disassembly assembly includes a mounting base 9, which is located on both sides of the top of the purification box 2. The mounting base 9 corresponds to the exhaust duct 24. The inner side of the mounting base 9 is provided with an internal thread, and the bottom of the outer side of the support cylinder 10 is provided with an external thread that matches the internal thread. The support cylinder 10 is installed on the inner side of the mounting base 9 by threaded connection. The bottom of the outer side of the support cylinder 10 is provided with an annular limiting piece 30, and the bottom of the limiting piece 30 is provided with an annular sealing gasket 31. The installation depth is limited by the annular limiting piece 30, and the connection is sealed by the sealing gasket 31. This achieves the purpose of positioning the support cylinder 10 and the filter bag 28 inside it on the top of the exhaust duct 24. The support cylinder 10 can be disassembled by twisting it in the opposite direction, thereby achieving the purpose of convenient cleaning or replacement of the filter bag 28 to ensure its filtration effect.

[0027] When in use, the support cylinder 10 is installed inside the mounting base 9 by threaded connection, and its installation depth is limited by the annular limiting piece 30. At the same time, the connection is sealed by the sealing gasket 31. The support cylinder 10 and the filter bag 28 inside are positioned and installed on the top of the exhaust duct 24. The support cylinder 10 can be disassembled by twisting it in the reverse direction.

[0028] Working Principle: When using the flue gas energy-saving treatment device, firstly, the support cylinder 10 is installed inside the mounting base 9 via a threaded connection, and its installation depth is limited by an annular limiting plate 30. Simultaneously, the connection is sealed using a sealing gasket 31. The support cylinder 10 and the filter bag 28 inside are positioned and installed at the top of the exhaust duct 24. The flue gas inlet 8 is connected to the electric furnace exhaust pipe. High-temperature flue gas is introduced into the heat exchange tubes 21 inside the heat exchange box 4 through the flue gas inlet 8. Simultaneously, cold water is introduced into the heat exchange box 4 through the water inlet 7, and the liquid level in the heat exchange box 4 is observed through the level gauge 6. The residual heat of the flue gas heats the cold water, and the hot water is discharged through the water outlet 5 for utilization. After being cooled by heat exchange in the heat exchange tubes 21, the flue gas is introduced into the aeration pipe 18 through the connecting pipe 3 and sprayed out into the purification box 2 through the aeration nozzle 19 to mix with the water and settle impurities. The flue gas and water are mixed... When the time is right, the drive motor 11 drives the agitator 25 to rotate, making it mix with the water faster and more completely. At the same time, the pump 14 is started to draw out the water in the purification tank 2. Impurities in the filter cover 27 are filtered out to prevent them from being sucked into the pump 14 and adhering to the impeller, which would affect the normal operation of the pump 14 in the long run. The water is then transported through the delivery pipe 13 to the annular spray pipe 22. Then, it is sprayed through the spray nozzle 26 to further absorb and reduce dust in the flue gas that has absorbed impurities after mixing with the water. Then, the negative pressure fan 23 discharges the flue gas that has been mixed with water and removed impurities through the exhaust duct 24 into the filter bag 28 for further filtration and purification. During the operation of the device, the water in the purification tank 2 is replenished through the water supply valve 12. After the flue gas treatment is completed, the support cylinder 10 and the filter bag 28 can be disassembled by twisting the support cylinder 10 in the reverse direction for cleaning or replacement. At the same time, the drain valve 17 is opened to discharge wastewater.

[0029] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. An energy-saving device for flue gas treatment in an electric melting furnace, comprising a base (1), characterized in that, Also includes: A purification box (2) is provided on one side of the top of the base (1), and a heat exchange box (4) is provided on the other side of the top of the base (1). A flue (8) is inserted into one side of the top of the heat exchange box (4). A level gauge (6) is provided at the front end of the heat exchange box (4). A connecting pipe (3) is inserted between the bottom of one side of the heat exchange box (4) and the bottom of one side of the purification box (2). A one-way valve (20) is provided inside the connecting pipe (3). A heat exchange structure is provided inside the heat exchange box (4). An exhaust duct (24) is provided on both sides of the top of the purification box (2). A negative pressure fan (23) is provided inside the exhaust duct (24). An agitation mechanism is provided inside the purification box (2). Support cylinders (10) are provided on both sides of the top of the purification box (2). A filter bag (28) is provided inside the support cylinder (10). A water supply is inserted into the top of the other side of the purification box (2). A drain valve (17) is inserted into the bottom of the other side of the purification box (2). An aeration pipe (18) is provided on one side of the connecting pipe (3) at the bottom of the purification box (2). An aeration nozzle (19) is provided at the top of the aeration pipe (18). A fixed seat (15) is provided near the middle on the other side of the purification box (2). A pump (14) is provided at the top of the fixed seat (15). A conveying pipe (13) is provided at the output end of the pump (14). A water pumping pipe (16) is inserted into the bottom of the other side of the purification box (2). A filter cover (27) is provided inside the purification box (2) on one side of the water pumping pipe (16). A spray pipe (22) is provided near the top of the inner side wall of the purification box (2). A spray nozzle (26) is provided at the bottom of the spray pipe (22). A disassembly assembly is provided between the bottom of the support cylinder (10) and the top of the purification box (2).

2. The energy-saving flue gas treatment device for an electric melting furnace according to claim 1, characterized in that, The top end of the water pumping pipe (16) passes through the inner top of the fixed base (15) and is fixedly connected to the input end of the pump (14). The top end of the conveying pipe (13) passes through the other side of the purification box (2) and is fixedly connected to one side of the spray pipe (22). The spray pipe (22) is annular, and the spray nozzles (26) are arranged at equal intervals at the bottom end of the spray pipe (22).

3. The flue gas energy-saving treatment device for an electric melting furnace according to claim 1, characterized in that, The heat exchange structure includes a heat exchange tube (21), which is installed inside the heat exchange box (4). The heat exchange tube (21) is serpentine. The top end of the heat exchange tube (21) is fixedly connected to the bottom of the flue (8) and communicates with it. The bottom end of the heat exchange tube (21) is fixedly connected to one side of the connecting pipe (3) and communicates with it. A water inlet (7) is inserted into the top of one side of the heat exchange box (4), and a water outlet (5) is inserted into the bottom of one side of the heat exchange box (4).

4. The energy-saving device for flue gas treatment in an electric melting furnace according to claim 1, characterized in that, The agitation mechanism includes an agitator (25), which is located inside the purification chamber (2). A drive motor (11) is located at the middle position of the top of the purification chamber (2). A bushing (29) is inserted at the middle position of the top of the purification chamber (2). The top of the agitator (25) passes through the bushing (29) and is connected to the output end of the drive motor (11).

5. The energy-saving flue gas treatment device for an electric melting furnace according to claim 1, characterized in that, The assembly and disassembly assembly includes a mounting base (9), which is located on both sides of the top of the purification box (2). A limiting plate (30) is provided at the bottom of the outer side of the support cylinder (10), and a sealing gasket (31) is provided at the bottom of the limiting plate (30).

6. The flue gas energy-saving treatment device for an electric melting furnace according to claim 5, characterized in that, The mounting base (9) corresponds to the exhaust duct (24). The inner side of the mounting base (9) is provided with an internal thread, and the bottom of the outer side of the support cylinder (10) is provided with an external thread that matches the internal thread. The limiting piece (30) and the sealing gasket (31) are annular.

Images