Safety pressure relief structure for conveying waste gas on lead smelting electric furnace

Abstract

The invention discloses a safety pressure relief structure for waste gas conveying on a lead smelting electric furnace, and particularly relates to the technical field of lead smelting, the safety pressure relief structure comprises an electric furnace body and a pressure relief valve, a waste gas pipe is mounted at the top of the electric furnace body, a connecting pipe is mounted at the left end of the pressure relief valve, and the connecting pipe communicates with the waste gas pipe; and a first-stage dust removal mechanism is mounted in the connecting pipe. According to the safety pressure relief structure for conveying the waste gas on the lead smelting electric furnace, the primary dust removal mechanism is arranged, dust in the waste gas is filtered before lead smelting waste gas enters the pressure relief valve, and the situation that the dust in the waste gas blocks the pressure relief valve, consequently, the pressure relief valve cannot work, and then the explosion risk is caused is avoided; the secondary dust removal mechanism and the purification mechanism are arranged at the tail end of the pressure release valve, waste gas exhausted by the pressure release valve is filtered and purified, dust and toxic substances carried in the waste gas are treated, and the situation that the waste gas is exhausted into air, and air pollution is caused is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of lead smelting, and in particular to a safety pressure relief structure for waste gas transportation on a lead smelting electric furnace. Background Art

[0002] Metal smelting is an important part of industrial production, and it provides a large amount of metal materials for other industries. Lead is a metal material that we often use. In the process of smelting lead in an electric furnace, a large amount of lead vapor is always produced. These exhaust gases may contain harmful substances, such as lead vapor, sulfur oxides, particulate matter, etc. If the pressure is too high, it may cause damage to the electric furnace or leakage of harmful gases, endangering the environment and personnel safety. Therefore, the exhaust gas is discharged through the exhaust pipe. When the pressure in the exhaust pipe gradually increases, it is easy to cause the exhaust pipe to rupture and cause exhaust gas leakage. Therefore, a pressure relief structure is usually set on the exhaust gas transmission pipeline. However, the existing pressure relief structure is prone to failure due to blockage by lead dust, causing explosion risks. At the same time, the exhaust gas is directly discharged into the air. Lead dust and acidic gases are not treated, which is easy to cause air pollution and affect the life safety of workers. Summary of the invention

[0003] The main purpose of the present invention is to provide a safe pressure relief structure for waste gas transportation on a lead smelting electric furnace, which can effectively solve the problems in the background technology of lead dust in the waste gas blocking the pressure relief structure and directly discharging the waste gas into the air causing air pollution.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A safety pressure relief structure for waste gas transportation on a lead smelting electric furnace comprises an electric furnace body and a pressure relief valve, an exhaust gas pipe is installed on the top of the electric furnace body, a connecting pipe is installed on the left end of the pressure relief valve, the connecting pipe is connected to the exhaust gas pipe, a primary dust removal mechanism is installed inside the connecting pipe, a secondary dust removal mechanism is installed on the right end of the pressure relief valve, and a purification mechanism is installed on the right end of the secondary dust removal mechanism.

[0006] Wherein, the pressure relief valve includes a valve body, a valve cover arranged on the valve body, a pressure relief pilot valve for adjusting the pressure in the valve body, and a guide rod arranged between the valve body and the valve cover. An air inlet and an air outlet which are interconnected through a pressure relief port are arranged in the valve body, the air inlet is connected to the right end of the connecting pipe, the secondary dust removal mechanism is connected to the right end of the air outlet, a valve disc which can be closed on the pressure relief port is arranged at the bottom of the guide rod, a diaphragm is fixedly installed on the top of the guide rod, the diaphragm and the valve cover form a control chamber, and a pressure relief spring is installed between the valve cover and the diaphragm.

[0007] Among them, the pressure relief pilot valve includes a valve seat installed on the top of the valve cover. A ventilation hole is provided in the middle of the bottom wall of the valve seat. A pressure relief hole is provided on the side wall of the ventilation hole. An air inlet hole is provided on one side of the bottom wall of the valve seat. The ventilation hole is communicated with the inside of the valve cover. The air inlet hole is communicated with the air inlet through a first connecting pipe. The pressure relief hole is communicated with the air outlet through a third connecting pipe. A second connecting pipe communicated with the inside is fixedly installed outside the valve cover. The other end of the second connecting pipe is communicated with the inside of the air inlet.

[0008] Among them, the pressure relief pilot valve further includes a valve cover installed above the valve body and a sealing guide rod moving in the ventilation hole. A screw rod is threadedly connected to the top of the valve cover. The bottom of the screw rod penetrates and extends into the sleeve and is fixedly installed with a gasket. A rubber diaphragm is fixedly installed at the top of the sealing guide rod. A cavity is formed between the rubber diaphragm and the sleeve. A return spring for closing the sealing guide rod to keep the ventilation hole closed is installed on the top of the rubber diaphragm. The gasket abuts against the upper end of the return spring. A nut is threadedly connected to the outer surface of the screw rod. A second knob is fixedly installed at the top of the screw rod. The lower end surface of the rubber diaphragm is communicated with the air inlet hole.

[0009] Among them, a screw pipe is fixedly installed in the middle of the outer surface of the connecting pipe. An installation hole communicated with the screw pipe is provided inside the connecting pipe. The primary dust removal mechanism is installed in the installation hole and the screw pipe.

[0010] Among them, the primary dust removal mechanism includes a first stud. A collecting pipe is rotatably installed at the front end of the first stud. A sealing cover is threadedly connected to the front end of the collecting pipe. Limit blocks are fixedly installed on both the upper and lower sides of the outer surface of the collecting pipe. Limit grooves are provided on both the upper and lower sides of the inner wall of the installation hole. The limit blocks slide in the limit grooves. A tapered opening is provided in the middle of the left side of the outer surface of the collecting pipe. A ventilation port is provided in the middle of the right side of the outer surface of the collecting pipe. A filter screen is installed in the ventilation port. The first stud is threadedly connected to the inner wall of the screw pipe. A first knob is fixedly installed at the rear end of the first stud.

[0011] Among them, a conveying assembly is installed on the left side in the middle of the connecting pipe. The conveying assembly includes a first annular plate and a first tapered pipe. The first annular plate is fixedly installed on the left side of the inner wall of the connecting pipe. The right end of the first annular plate is fixedly installed with an annular pipe. The right end of the first tapered pipe is matched with the tapered opening. An installation groove is provided in the inner wall of the annular pipe. The left end of the first tapered pipe slidably penetrates and extends into the installation groove and is fixedly installed with a second annular plate. A buffer spring is installed between the left end of the second annular plate and the left wall of the installation groove.

[0012] Among them, a second limiting ring is fixedly installed on the inner edge side of the left wall of the installation groove. A first limiting ring is fixedly installed on the inner edge side of the left end of the second annular plate. The two ends of the buffer spring are respectively sleeved outside the first limiting ring and the second limiting ring.

[0013] Among them, the secondary dust removal mechanism includes a dust removal pipe and a motor. At the bottom of the outer surface of the dust removal pipe, a feeding pipe is fixedly installed. At the bottom of the feeding pipe, a collecting cylinder is installed by threading. On the inner wall of the dust removal pipe, a filter plate is fixedly installed on the right side of the feeding pipe. The motor is fixedly installed on the dust removal pipe. In the middle of the left end of the filter plate, a rotating rod is rotatably installed. On the outer surface of the rotating rod, three first scraping plates are evenly and fixedly installed. The rear ends of the first scraping plates scrape on the front end of the filter plate. One end of the first scraping plate away from the rotating rod is fixedly installed with a second scraping plate. The second scraping plate is slidably connected to the inner wall of the dust removal pipe. The right end of the rotating rod rotatably penetrates the filter plate and is fixedly installed with a second bevel gear. The output end of the motor is fixedly installed with a driving rod. The driving rod penetrates and extends into the dust removal pipe and is fixedly installed with a first bevel gear. The first bevel gear meshes with the second bevel gear.

[0014] Among them, the purification mechanism includes a purification cylinder, a second conical pipe, an annular air injection pipe, a water pump and a water injection pipe. The right end of the dust removal pipe penetrates and extends into the purification cylinder and is fixedly installed with a second conical pipe. The annular air injection pipe is fixedly installed in the middle of the bottom wall of the purification cylinder. The right end of the second conical pipe is fixedly installed with an air delivery pipe. The bottom of the air delivery pipe is connected to the annular air injection pipe. On the upper part of the outer surface of the annular air injection pipe, a plurality of air injection ports are evenly and fixedly installed. The water injection pipe is fixedly installed on the top of the inner wall of the purification cylinder. The water pump is fixedly installed on one side of the bottom wall of the purification cylinder. The output end of the water pump is fixedly installed with a water delivery pipe. The water delivery pipe is communicated with the water injection pipe. A plurality of spray heads are arranged at the bottom of the water injection pipe. An exhaust port is arranged in the middle of the top end of the purification cylinder. A drain port is installed on the right side of the outer surface of the purification cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention discloses a safety pressure relief structure for waste gas transmission on a lead smelting electric furnace. By setting a primary dust removal mechanism, the dust in the waste gas is filtered before the waste gas enters the pressure relief valve, avoiding the blockage of the pressure relief valve by the dust in the waste gas, resulting in the inability of the pressure relief valve to work and further leading to the risk of explosion.

[0017] 2. The present invention discloses a safety pressure relief structure for waste gas transmission on a lead smelting electric furnace. At the end of the pressure relief valve, a secondary dust removal mechanism and a purification mechanism are provided. The waste gas discharged from the pressure relief valve is filtered by the secondary dust removal mechanism to remove the dust carried in the waste gas, avoiding air pollution caused by discharging it into the air. At the same time, the set purification device can purify the toxic substances contained in the lead smelting waste gas, avoiding the threat to the life and health of workers caused by the discharge of toxic gases into the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a partial structural schematic diagram of the present invention;

[0020] Figure 3 is a sectional view of a part of the structure of the present invention;

[0021] Figure 4 is of the present invention Figure 3 an enlarged schematic view of part A;

[0022] Figure 5 is a structural schematic diagram of the primary dust removal mechanism of the present invention;

[0023] Figure 6 is a structural schematic diagram of the secondary dust removal mechanism and the purification mechanism of the present invention;

[0024] Figure 7 is a sectional view of the connecting pipe and the primary dust removal mechanism of the present invention;

[0025] Figure 8 is a structural schematic diagram of the pressure relief guiding valve of the present invention.

[0026] In the figure: 1, electric furnace body; 2, waste gas pipe; 3, pressure relief valve; 4, connecting pipe; 5, secondary dust removal mechanism; 6, purification mechanism; 7, primary dust removal mechanism; 8, conveying assembly; 31, valve body; 32, valve cover; 33, pressure relief port; 34, guide rod; 35, valve flap; 36, diaphragm; 37, pressure relief guiding valve; 38, pressure relief spring; 39, first communication pipe; 310, second communication pipe; 313, third communication pipe; 311, air inlet; 312, air outlet; 81, first annular plate; 82, annular pipe; 83, first conical pipe; 84, second annular plate; 85, first limiting ring; 86, buffer spring; 821, installation groove; 823, second limiting ring; 71, first stud; 72, collecting pipe; 73, conical opening; 74, ventilation port; 75, sealing cover; 76, limiting block; 77, first knob; 51, dust removal pipe; 52, blanking pipe; 53, collecting cylinder; 54, filter plate; 55, rotating rod; 56, first scraper; 57, second scraper; 58, motor; 59, driving rod; 510, first bevel gear; 511, second bevel gear; 61, purification cylinder; 62, second conical pipe; 63, air delivery pipe; 64, annular spray pipe; 65, spray port; 66, water pump; 67, water delivery pipe; 68, spray pipe; 69, spray head; 610, drain port; 371, valve seat; 372, sleeve; 3711, pressure relief hole; 3712, air inlet hole; 3713, ventilation hole; 373, sealing guide rod; 374, screw; 375, nut; 376, second knob; 377, return spring; 378, gasket; 379, rubber diaphragm; 41, installation hole; 42, screw pipe; 43, limiting groove; 611, exhaust port. Detailed implementation mode

[0027] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0028] Embodiment 1

[0029] As Figures 1-3 shown in FIGS. 7 and 8, a safety pressure relief structure for waste gas transportation on a lead smelting electric furnace includes an electric furnace body 1 and a pressure relief valve 3. A waste gas pipe 2 is installed at the top of the electric furnace body 1. A connecting pipe 4 is installed at the left end of the pressure relief valve 3. The connecting pipe 4 is communicated with the waste gas pipe 2. A primary dust removal mechanism 7 is installed inside the connecting pipe 4. A secondary dust removal mechanism 5 is installed at the right end of the pressure relief valve 3. A purification mechanism 6 is installed at the right end of the secondary dust removal mechanism 5.

[0030] Among them, the pressure relief valve 3 includes a valve body 31, a valve cover 32 provided on the valve body 31, a pressure relief pilot valve 37 for adjusting the pressure inside the valve body 31, a guide rod 34 provided between the valve body 31 and the valve cover 32. An air inlet 311 and an air outlet 312 that are communicated with each other through a pressure relief port 33 are provided inside the valve body 31. The air inlet 311 is communicated with the right end of the connecting pipe 4. The secondary dust removal mechanism 5 is communicated with the right end of the air outlet 312. A valve flap 35 that can be closed on the pressure relief port 33 is provided at the bottom of the guide rod 34. A diaphragm 36 is fixedly installed at the top of the guide rod 34. The diaphragm 36 can deform with the up and down swing of the guide rod 34 to avoid affecting the up and down movement of the guide rod 34. A control cavity is formed between the diaphragm 36 and the valve cover 32. A pressure relief spring 38 is installed between the valve cover 32 and the diaphragm 36.

[0031] Among them, the pressure relief pilot valve 37 includes a valve seat 371 installed on the top of the valve cover 32. A ventilation hole 3713 is opened in the middle of the bottom wall of the valve seat 371. A pressure relief hole 3711 is opened on the side wall of the ventilation hole 3713. An air inlet hole 3712 is opened on one side of the bottom wall of the valve seat 371. The ventilation hole 3713 is communicated with the inside of the valve cover 32. The air inlet hole 3712 is communicated with the air inlet 311 through a first connecting pipe 39. The pressure relief hole 3711 is communicated with the air outlet 312 through a third connecting pipe 313. A second connecting pipe 310 that is communicated with the inside is fixedly installed outside the valve cover 32. The other end of the second connecting pipe 310 is communicated with the inside of the air inlet 311.

[0032] Among them, the pressure relief pilot valve 37 further includes a valve cover 32 installed above the valve body 31 and a sealing guide rod 373 that moves within the vent hole 3713. A screw rod 374 is threadedly connected to the top of the valve cover 32. The bottom of the screw rod 374 penetrates and extends into the sleeve 372 and is fixedly installed with a gasket 378. A rubber diaphragm 379 is fixedly installed at the top of the sealing guide rod 373. A cavity is formed between the rubber diaphragm 379 and the sleeve 372. A return spring 377 for closing and maintaining the vent hole 3713 by the sealing guide rod 373 is installed at the top of the rubber diaphragm 379. The return spring 377 squeezes the rubber diaphragm 379, and the rubber diaphragm 379 squeezes the sealing guide rod 373 to seal the vent hole 3713. The gasket 378 abuts against the upper end of the return spring 377. A nut 375 is threadedly connected to the outer surface of the screw rod 374. A second knob 376 is fixedly installed at the top of the screw rod 374. The lower end surface of the rubber diaphragm 379 communicates with the air inlet hole 3712. The waste gas in the air inlet 311 can act on the lower end of the rubber diaphragm 379 through the air inlet hole 3712.

[0033] During use, rotate the second knob 376. The second knob 376 drives the screw rod 374 to move downward, driving the gasket 378 to move downward. The gasket 378 squeezes the return spring 377, thereby completing the squeezing of the rubber diaphragm 379 and adjusting the compression degree of the return spring 377, thereby adjusting the holding pressure value. The gas is transported into the air inlet hole 3712 through the first connecting pipe. The waste gas is transported into the control chamber through the second connecting pipe 310. The gas squeezes the diaphragm 36, thereby driving the guide rod 34 to move downward and driving the valve flap 35 to close the pressure relief port 33. When the pressure in the waste gas pipe 2 is too high, the excessive air pressure is conducted into the air inlet 311, and then transported into the air inlet hole 3712 through the first connecting pipe 39 to squeeze the rubber diaphragm 379 upward. When the waste gas pressure is greater than the pressure of the return spring 377, it drives the rubber diaphragm 379 to move upward, thereby driving the sealing guide rod 373 to move upward, thereby connecting the vent hole 3713 and the pressure relief hole 3711. The gas in the control chamber enters the pressure relief hole 3711 through the vent hole 3713, and then enters the air outlet 312 through the third connecting pipe 313. The pressure in the control chamber decreases, and the air pressure pushes the valve flap 35 open. Then the waste gas passes through the pressure relief port 33 from the air inlet 311 and enters the air outlet 312, thereby completing the pressure relief work. When the waste gas is discharged to a certain extent, the pressure in the air inlet 311 decreases, and the air pressure on the rubber diaphragm 379 becomes smaller. Under the action of the pressure of the return spring 377, it drives the rubber diaphragm 379 to move downward, thereby driving the sealing guide rod 373 to seal the vent hole 3713, thereby increasing the pressure in the control chamber, driving the diaphragm 36 to move downward again, and driving the guide rod 34 to seal the valve flap 35 on the pressure relief port 33.

[0034] Embodiment 2

[0035] In order to prevent the dust in the waste gas generated during the smelting of lead materials in the electric furnace from clogging the pipes and gaps in the pressure relief valve 3, which may affect the pressure relief operation of the pressure relief valve 3, resulting in excessive pressure inside the waste gas pipe 2, potentially causing damage to the waste gas pipe 2 or leakage of harmful gases, endangering the environment and personnel safety.

[0036] See Figures 3-5 As shown in FIGS. 5 and 7, in order to convey the waste gas into the pressure relief valve 3, a conveying assembly 8 is installed on the left side of the middle part of the connecting pipe 4. A screw pipe 42 is fixedly installed on the middle part of the outer surface of the connecting pipe 4, and an installation hole 41 communicating with the screw pipe 42 is provided inside the connecting pipe 4. The primary dust removal mechanism 7 is installed in the installation hole 41 and the screw pipe 42. The waste gas to be pressure relieved is conveyed into the primary dust removal mechanism 7 through the conveying assembly 8, and the waste gas is filtered in advance before the pressure relief valve 3 relieves pressure to filter the dust in the waste gas, preventing the dust in the waste gas from clogging the pipelines and gaps on the pressure relief valve 3 and affecting the normal operation of the pressure relief valve 3.

[0037] Among them, the primary dust removal mechanism 7 includes a first stud 71. The front end of the first stud 71 is rotatably installed with a collecting pipe 72. The front end of the collecting pipe 72 is threadedly connected with a sealing cover 75. Limiting blocks 76 are fixedly installed on both the upper and lower sides of the outer surface of the collecting pipe 72. Limiting grooves 43 are provided on both the upper and lower sides of the inner wall of the installation hole 41, and the limiting blocks 76 slide in the limiting grooves 43. A tapered opening 73 is provided in the middle of the left side of the outer surface of the collecting pipe 72, and it is communicated with the conveying assembly 8 through the tapered opening 73. A ventilation opening 74 is provided in the middle of the right side of the outer surface of the collecting pipe 72, and a filter screen is installed in the ventilation opening 74. The waste gas is filtered through the filter screen, and the collected dust is collected into the collecting pipe 72. The first stud 71 is threadedly connected with the inner wall of the screw pipe 42, and a first knob 77 is fixedly installed at the rear end of the first stud 71.

[0038] After the primary dust removal mechanism 7 has been used for a long time, it is necessary to filter the dust in the collecting pipe 72. Rotate the first knob 77. The first knob 77 drives the first stud 71 to rotate. While the stud rotates, it moves away from the screw pipe 42, and also drives the collecting pipe 72 to move in the installation hole 41, driving the limiting blocks 76 to slide in the limiting grooves 43, taking out the entire collecting pipe 72 from the connecting pipe 4, and then rotating the sealing cover 75 to open the collecting pipe 72 and cleaning the dust left by the filter screen to avoid affecting the operation of the primary dust removal mechanism 7.

[0039] Among them, the conveying component 8 includes a first annular plate 81 and a first conical tube 83. The first annular plate 81 is fixedly installed on the left side of the inner wall of the connecting pipe 4. The right end of the first annular plate 81 is fixedly installed with an annular pipe 82. The right end of the first conical tube 83 is matched with the conical opening 73. An installation groove 821 is formed in the inner wall of the annular pipe 82. The left end of the first conical tube 83 slides through and extends into the installation groove 821 and is fixedly installed with a second annular plate 84. A buffer spring 86 is installed between the left end of the second annular plate 84 and the left wall of the installation groove 821.

[0040] When installing the primary dust removal mechanism 7, when the collecting pipe 72 slides in the installation hole 41, the collecting pipe 72 squeezes the first conical tube 83. The first conical tube 83 squeezes the spring through the second annular plate 84, and the first conical tube 83 enters the annular pipe 82. When the conical opening 73 is opposite to the first conical tube 83, the buffer spring 86 squeezes the second annular plate 84, and the second annular plate 84 drives the conical tube to extend out of the annular pipe 82, and then drives the first conical tube 83 to enter the conical opening 73, and conveys the waste gas entering the connecting pipe 4 through the first conical tube 83 into the collecting pipe 72 for filtration and then conveys it into the pressure relief valve 3.

[0041] Among them, a second limiting ring 823 is fixedly installed on the inner edge side of the left wall of the installation groove 821, and a first limiting ring 85 is fixedly installed on the inner edge side of the left end of the second annular plate 84. The two ends of the buffer spring 86 are respectively sleeved outside the first limiting ring 85 and the second limiting ring 823. In order to prevent the buffer spring 86 from tilting and falling off during the movement, the buffer spring 86 is limited by the provided first limiting ring 85 and second limiting ring 823.

[0042] Embodiment III

[0043] When lead ore or lead-containing materials are smelted at high temperature in an electric furnace, various gases will be generated, and a large amount of waste gas will be discharged during the pressure relief process. This waste gas contains dust and acidic gases, etc. After this waste gas is discharged randomly, it is easy to cause corrosion to the working equipment and the production site, and seriously affect the production environment.

[0044] Referring to FIGS. 3 and 6, the secondary dust removal mechanism 5 includes a dust removal pipe 51 and a motor 58. At the bottom of the outer surface of the dust removal pipe 51, a blanking pipe 52 is fixedly installed. At the bottom of the blanking pipe 52, a collection cylinder 53 is installed in a threaded manner. Inside the inner wall of the dust removal pipe 51, a filter plate 54 is fixedly installed on the right side of the blanking pipe 52. The motor 58 is fixedly installed on the dust removal pipe 51. In the middle of the left end of the filter plate 54, a rotating rod 55 is rotatably installed. On the outer surface of the rotating rod 55, three first scraping plates 56 are evenly fixedly installed. The rear end of the first scraping plate 56 scrapes on the front end of the filter plate 54. At one end of the first scraping plate 56 away from the rotating rod 55, a second scraping plate 57 is fixedly installed. The second scraping plate 57 is slidably connected to the inner wall of the dust removal pipe 51. The right end of the rotating rod 55 rotatably penetrates the filter plate 54 and is fixedly installed with a second bevel gear 511. The output end of the motor 58 is fixedly installed with a driving rod 59. The driving rod 59 penetrates and extends into the dust removal pipe 51 and is fixedly installed with a first bevel gear 510. The first bevel gear 510 and the second bevel gear 511 are engaged with each other.

[0045] During use, the waste gas discharged during the pressure relief process through the pressure relief valve 3 enters the dust removal pipe 51 and is filtered by the filter plate 54. The dust carried by the waste gas is filtered by the filter plate 54 and remains in the dust removal pipe 51. The motor 58 is started to drive the driving rod 59 to rotate. The driving rod 59 drives the first bevel gear 510 to rotate. The first bevel gear 510 drives the second bevel gear 511 to rotate. The second bevel gear 511 drives the rotating rod 55 to rotate. The rotating rod 55 drives the first scraping plate 56 to rotate, scraping the dust adhering to the filter plate 54 into the dust removal pipe 51. The first scraping plate 56 drives the second scraping plate 57 to rotate, scraping the inner wall of the dust removal pipe 51, and scraping the collected dust into the blanking pipe 52, and then collecting it into the collection cylinder 53. The filtered waste gas is transported to the purification mechanism 6.

[0046] Among them, the purification mechanism 6 includes a purification cylinder 61, a second conical pipe 62, an annular air injection pipe 64, a water pump 66 and a water injection pipe 68. The right end of the dust removal pipe 51 penetrates and extends into the purification cylinder 61 and is fixedly installed with a second conical pipe 62. The annular air injection pipe 64 is fixedly installed in the middle of the bottom wall of the purification cylinder 61. At the end of the right end of the second conical pipe 62, an air delivery pipe 63 is fixedly installed. The bottom of the air delivery pipe 63 is connected to the annular air injection pipe 64. On the upper part of the outer surface of the annular air injection pipe 64, a plurality of air injection ports 65 are evenly fixedly installed. The water injection pipe 68 is fixedly installed on the top of the inner wall of the purification cylinder 61. The water pump 66 is fixedly installed on one side of the bottom wall of the purification cylinder 61. The output end of the water pump 66 is fixedly installed with a water delivery pipe 67. The water delivery pipe 67 is communicated with the water injection pipe 68. At the bottom of the water injection pipe 68, a plurality of spray heads 69 are provided. In the middle of the top end of the purification cylinder 61, an exhaust port 611 is provided. On the right side of the outer surface of the purification cylinder 61, a drain port 610 is installed.

[0047] During use, a purification liquid is injected into the purification cylinder 61. The waste gas filtered by the secondary dust removal mechanism 5 is transported into the second conical tube 62, and then transported into the annular tube 82 through the air delivery pipe 63. The waste gas is ejected through the air jet orifice 65 into the purification liquid. During the upward movement of the waste gas, the purification liquid absorbs the harmful substances remaining in the waste gas. At the same time, the water pump 66 transports the purification liquid through the water delivery pipe 67 into the water spray pipe 68, and then sprays out from the spray head 69 to further purify the waste gas discharged from the purification liquid, improving the treatment effect on the harmful substances in the waste gas, avoiding direct emission into the atmosphere, causing environmental pollution, and affecting the life safety of the staff.

[0048] The working principle of the present invention is as follows: During use, rotate the second knob 376. The second knob 376 drives the screw rod 374 to move downward, driving the gasket 378 to move downward. The gasket 378 squeezes the return spring 377, thereby completing the squeezing of the rubber diaphragm 379 and adjusting the compression degree of the return spring 377, thereby adjusting the holding pressure value. The gas is transported into the air inlet hole 3712 through the first communication pipe. The waste gas is transported into the control cavity through the second communication pipe 310. The gas squeezes the diaphragm 36, thereby driving the guide rod 34 to move downward, driving the valve flap 35 to close the pressure relief port 33. When the pressure in the waste gas pipe 2 is too high, the excessive air pressure is conducted into the air inlet 311, and then transported into the air inlet hole 3712 through the first communication pipe 39 to squeeze the rubber diaphragm 379 upward. When the air pressure is greater than the pressure of the return spring 377, it drives the rubber diaphragm 379 to move upward, thereby driving the sealing guide rod 373 to move upward, thereby connecting the ventilation hole 3713 and the pressure relief hole 3711. The gas in the control cavity enters the pressure relief hole 3711 through the ventilation hole 3713, and then enters the air outlet 312 through the third communication pipe 313. The pressure in the control cavity decreases, and the air pressure pushes the valve flap 35 open. Then the waste gas passes through the pressure relief port 33 from the air inlet 311 into the air outlet 312, thereby completing the pressure relief work. When the waste gas is discharged to a certain extent, the pressure in the air inlet 311 decreases, and the air pressure on the rubber diaphragm 379 becomes smaller. Under the action of the pressure of the return spring 377, it drives the rubber diaphragm 379 to move downward, thereby driving the sealing guide rod 373 to seal the ventilation hole 3713, thereby increasing the pressure in the control cavity, driving the diaphragm 36 to move downward again, and driving the guide rod 34 to seal the valve flap 35 on the pressure relief port 33.

[0049] During the lead smelting process, waste gas enters the waste gas pipe 2. When the pressure in the waste gas pipe 2 is too high, the waste gas enters the connecting pipe 4 from the waste gas pipe 2, and then enters the primary dust removal mechanism 7 through the conveying assembly 8 for dust removal. The waste gas after dust removal enters the pressure relief valve 3 to prevent dust from clogging the pressure relief valve 3 and causing the pressure relief valve 3 to malfunction. When the pressure in the pressure relief valve 3 reaches the set holding pressure value, the pressure relief valve 3 opens, and the waste gas is conveyed to the secondary dust removal mechanism 5 for further filtration to further reduce the dust content in the waste gas. Then, the filtered waste gas is conveyed to the purification mechanism 6, and the purification mechanism 6 purifies the toxic substances contained in the lead smelting waste gas, avoiding direct emission into the air causing air pollution and also avoiding damage to the life and health of workers. The above shows and describes the basic principle, main features and advantages of the present invention.

[0050] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety pressure relief structure for waste gas transportation on a lead smelting electric furnace, characterized in that: It includes an electric furnace body (1) and a pressure relief valve (3). A waste gas pipe (2) is installed at the top of the electric furnace body (1). A connecting pipe (4) is installed at the left end of the pressure relief valve (3). The connecting pipe (4) is communicated with the waste gas pipe (2). A primary dust removal mechanism (7) is installed inside the connecting pipe (4). A secondary dust removal mechanism (5) is installed at the right end of the pressure relief valve (3). A purification mechanism (6) is installed at the right end of the secondary dust removal mechanism (5).

2. The safety pressure relief structure for waste gas transportation on a lead smelting electric furnace according to claim 1, characterized in that: The pressure relief valve (3) includes a valve body (31), a valve cover (32) provided on the valve body (31), a pressure relief pilot valve (37) for adjusting the pressure inside the valve body (31), and a guide rod (34) provided between the valve body (31) and the valve cover (32). An air inlet (311) and an air outlet (312) that are communicated with each other through a pressure relief port (33) are provided inside the valve body (31). The air inlet (311) is communicated with the right end of the connecting pipe (4). The secondary dust removal mechanism (5) is communicated with the right end of the air outlet (312). A valve flap (35) that can be closed on the pressure relief port (33) is provided at the bottom of the guide rod (34). A diaphragm (36) is fixedly installed at the top of the guide rod (34). A control chamber is formed between the diaphragm (36) and the valve cover (32). A pressure relief spring (38) is installed between the valve cover (32) and the diaphragm (36).

3. The safety pressure relief structure for waste gas transportation on a lead smelting electric furnace according to claim 2, wherein: The pressure relief pilot valve (37) includes a valve seat (371) installed on the top of the valve cover (32). A ventilation hole (3713) is opened in the middle of the bottom wall of the valve seat (371). A pressure relief hole (3711) is opened on the side wall of the ventilation hole (3713). An air inlet hole (3712) is opened on one side of the bottom wall of the valve seat (371). The ventilation hole (3713) is communicated with the inside of the valve cover (32). The air inlet hole (3712) is communicated with the air inlet (311) through a first connecting pipe (39). The pressure relief hole (3711) is communicated with the air outlet (312) through a third connecting pipe (313). A second connecting pipe (310) that is communicated with the inside is fixedly installed outside the valve cover (32). The other end of the second connecting pipe (310) is communicated with the inside of the air inlet (311).

4. The safety pressure relief structure for waste gas transportation on a lead smelting electric furnace according to claim 3, characterized in that: The pressure relief pilot valve (37) further includes a valve cover (32) installed above the valve body (31) and a sealing guide rod (373) that moves within the vent hole (3713). A screw rod (374) is threadedly connected to the top of the valve cover (32). The bottom of the screw rod (374) extends through and is fixedly installed with a gasket (378) inside the sleeve (372). A rubber diaphragm (379) is fixedly installed at the top of the sealing guide rod (373). A cavity is formed between the rubber diaphragm (379) and the sleeve (372). A return spring (377) for keeping the sealing guide rod (373) closed to block the vent hole (3713) is installed on the top of the rubber diaphragm (379). The gasket (378) abuts against the upper end of the return spring (377). A nut (375) is threadedly connected to the outer surface of the screw rod (374). A second knob (376) is fixedly installed at the top of the screw rod (374). The lower end face of the rubber diaphragm (379) communicates with the air inlet hole (3712).

5. The safety pressure relief structure for waste gas transportation on a lead smelting electric furnace according to claim 1, characterized in that: A screw pipe (42) is fixedly installed in the middle of the outer surface of the connecting pipe (4). An installation hole (41) communicating with the screw pipe (42) is formed inside the connecting pipe (4). The primary dust removal mechanism (7) is installed in the installation hole (41) and the screw pipe (42).

6. The safety pressure relief structure for waste gas transportation on a lead smelting electric furnace according to claim 5, characterized in that: The primary dust removal mechanism (7) includes a first stud (71). A collection pipe (72) is rotatably installed at the front end of the first stud (71). A sealing cover (75) is threadedly connected to the front end of the collection pipe (72). Limit blocks (76) are fixedly installed on both the upper and lower sides of the outer surface of the collection pipe (72). Limit grooves (43) are formed on both the upper and lower sides of the inner wall of the installation hole (41). The limit blocks (76) slide within the limit grooves (43). A tapered opening (73) is formed in the middle of the left side of the outer surface of the collection pipe (72). A vent hole (74) is formed in the middle of the right side of the outer surface of the collection pipe (72). A filter screen is installed in the vent hole (74). The first stud (71) is threadedly connected to the inner wall of the screw pipe (42). A first knob (77) is fixedly installed at the rear end of the first stud (71).

7. The safety pressure relief structure for waste gas transmission on a lead smelting electric furnace according to claim 6, characterized in that: A conveying assembly (8) is installed on the left side in the middle of the connecting pipe (4). The conveying assembly (8) includes a first annular plate (81) and a first tapered pipe (83). The first annular plate (81) is fixedly installed on the left inner wall of the connecting pipe (4). The right end of the first annular plate (81) is fixedly installed with an annular pipe (82). The right end of the first tapered pipe (83) is matched with the tapered opening (73). An installation groove (821) is formed in the inner wall of the annular pipe (82). The left end of the first tapered pipe (83) slidably penetrates and extends into the installation groove (821) and is fixedly installed with a second annular plate (84). A buffer spring (86) is installed between the left end of the second annular plate (84) and the left wall of the installation groove (821).

8. A safety pressure relief structure for waste gas transportation on a lead smelting electric furnace according to claim 7, characterized in that: The inner edge side of the left wall of the installation groove (821) is fixedly installed with a second limiting ring (823). The inner edge side of the left end of the second annular plate (84) is fixedly installed with a first limiting ring (85). Both ends of the buffer spring (86) are respectively sleeved outside the first limiting ring (85) and the second limiting ring (823).

9. A safety pressure relief structure for waste gas transmission on a lead smelting electric furnace according to claim 1, characterized in that: The secondary dust removal mechanism (5) includes a dust removal pipe (51) and a motor (58). A blanking pipe (52) is fixedly installed at the bottom of the outer surface of the dust removal pipe (51). A collection cylinder (53) is threadedly installed at the bottom of the blanking pipe (52). A filter plate (54) is fixedly installed on the inner wall of the dust removal pipe (51) on the right side of the blanking pipe (52). The motor (58) is fixedly installed on the dust removal pipe (51). A rotating rod (55) is rotatably installed in the middle of the left end of the filter plate (54). Three first scraping plates (56) are evenly fixedly installed on the outer surface of the rotating rod (55). The rear end of the first scraping plate (56) scrapes on the front end of the filter plate (54). One end of the first scraping plate (56) far away from the rotating rod (55) is fixedly installed with a second scraping plate (57). The second scraping plate (57) is slidably connected to the inner wall of the dust removal pipe (51). The right end of the rotating rod (55) rotatably penetrates through the filter plate (54) and is fixedly installed with a second bevel gear (511). The output end of the motor (58) is fixedly installed with a driving rod (59). The driving rod (59) penetrates and extends into the dust removal pipe (51) and is fixedly installed with a first bevel gear (510). The first bevel gear (510) is meshed with the second bevel gear (511).

10. A safety pressure relief structure for waste gas transportation on a lead smelting electric furnace according to claim 9, characterized in that: The purification mechanism (6) includes a purification cylinder (61), a second conical pipe (62), an annular air spraying pipe (64), a water pump (66) and a water spraying pipe (68). The right end of the dust removal pipe (51) penetrates and extends into the purification cylinder (61) and is fixedly installed with a second conical pipe (62). The annular air spraying pipe (64) is fixedly installed in the middle of the bottom wall of the purification cylinder (61). The right end of the second conical pipe (62) is fixedly installed with an air delivery pipe (63). The bottom of the air delivery pipe (63) is connected to the annular air spraying pipe (64). A plurality of air spraying ports (65) are evenly fixedly installed on the upper part of the outer surface of the annular air spraying pipe (64). The water spraying pipe (68) is fixedly installed at the top of the inner wall of the purification cylinder (61). The water pump (66) is fixedly installed on one side of the bottom wall of the purification cylinder (61). The output end of the water pump (66) is fixedly installed with a water delivery pipe (67). The water delivery pipe (67) is communicated with the water spraying pipe (68). A plurality of spray heads (69) are arranged at the bottom of the water spraying pipe (68). An exhaust port (611) is arranged in the middle of the top end of the purification cylinder (61). A drain port (610) is installed on the right side of the outer surface of the purification cylinder (61).

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