A blast furnace gas pH value adjusting device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU SHAGANG GROUP CO LTD
- Filing Date
- 2023-10-19
- Publication Date
- 2026-06-16
Smart Images
Figure CN117143642B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of blast furnace gas, specifically a pH adjustment device for blast furnace gas. Background Technology
[0002] Blast furnace gas is a byproduct of the blast furnace smelting process, and its dust content is generally around 10 mg / m³. 3 The above must be purified and dust removed before use. The application of dry bag filter dust collectors for blast furnace gas brings another new problem: the chloride ion acidic corrosive gas contained in the blast furnace gas is not removed. After dry bag filter dust removal, the blast furnace gas transportation pipeline is severely corroded by strong acid, causing the blast furnace gas pipeline system to be corroded and leak gas, creating a very big safety hazard.
[0003] A patent application with publication number CN217103762U discloses a desulfurization and dechlorination device for blast furnace gas, including a scrubbing tower, a recovery tank, and a sedimentation tank. The scrubbing tower includes a collection tank, an alkali spraying zone, and a dehydration zone arranged sequentially from bottom to top. The recovery tank adjusts the pH of the waste liquid flowing out of the collection tank. After pH adjustment in the recovery tank, the waste liquid is sent to the sedimentation tank for sedimentation. The scrubbing tower removes impurities such as hydrogen sulfide and hydrogen chloride from the gas. The used cooling water is collected and treated for recycling, thereby improving water resource utilization.
[0004] The above-mentioned device can dechlorinate and cool blast furnace gas during use. When alkali is sprayed into the blast furnace gas, the lime alkali solution reacts with air during preparation to form a solid precipitate. The precipitated solid will accumulate and clump together, which can easily clog the nozzle when passing through the alkali solution pipeline. The nozzle that is sprayed into the pipeline is not easy to disassemble. If a filter screen is installed at the front end, it is inconvenient to replace it when it is clogged.
[0005] Therefore, the present invention provides a blast furnace gas pH adjustment device. Summary of the Invention
[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.
[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A blast furnace gas pH adjustment device according to this invention includes a housing, a housing top fixedly installed at the top of the housing, an outlet pipe fixedly installed at the top of the housing top, an emergency water spray cooling device fixedly installed on the side wall of the housing, an inlet pipe fixedly installed on the lower side wall of the housing, and an alkali atomizing spray gun device provided on the outer wall of the inlet pipe. The alkali atomizing spray gun device includes a spray gun head slidably installed on the side wall of the inlet pipe, and a nozzle fixedly installed at one end of the spray gun head. The other end of the spray gun head is connected to the side wall of the alkali flow pipe. An alkali inlet is fixedly installed at the end of the alkali flow pipe. An alkali filter tube is provided on the side wall of the alkali inlet. An alkali filter block is fixedly installed inside the alkali filter tube. A pipe protrusion is fixedly installed on the outer wall of the alkali inlet. A pipe extension block is fixedly installed on the side wall of the pipe protrusion. A rotating column is rotatably connected inside the pipe extension block. A rotating disk is rotatably installed on the rotating column. The alkali inlet slides on the inner wall of the rotating disk.
[0008] Preferably, the emergency water spray cooling device includes multiple water spray nozzles fixedly installed on the upper part of the box, and water spray pipes are fixedly installed at the ends of the water spray nozzles.
[0009] Preferably, the interior of the chamber is equipped with a cyclone centrifugal de-fogging separation device. The cyclone centrifugal de-fogging separation device includes a support column fixedly installed at the bottom of the inner wall of the chamber. A placement net is fixedly installed at the top of the support column. The acid-base balance salt mist after the reaction must be effectively captured. Otherwise, the mist droplets will escape from the interior of the chamber, causing scale buildup and blockage of the neutralized salt inside the outlet pipe. Therefore, a support column is fixedly installed at the bottom inner wall of the chamber, and a placement net is fixedly installed at the top of the support column. The placement net can capture the mist droplets. By setting a cyclone centrifugal de-fogging device at the outlet end of the upper part of the chamber, gas-liquid separation is achieved. The higher the efficiency of the cyclone centrifugal de-fogging device, the higher the cyclone velocity and the higher the airflow resistance, thereby cooling the neutralized salt and preventing scale buildup after the gas flows into the outlet pipe.
[0010] Preferably, the alkaline filter tube has two fixed rods internally connected by a rolling connection. A sliding tooth is fixedly installed at the top of the fixed rod, a first limiting block is fixedly installed at the bottom of the sliding tooth, a first spring is fixedly installed on the side wall of the first limiting block, a second limiting block is fixedly installed at the top of the alkaline filter tube, the side wall of the second limiting block is fixedly installed at the bottom of the first spring, and a valve is fixedly installed at the bottom of the fixed rod.
[0011] Preferably, a valve isolation device is fixedly installed at the top of the alkali flow pipe away from the alkali flow pipe. The valve isolation device includes a push chamber fixedly installed at the top of the pipe protrusion. A valve top plate is slidably connected inside the push chamber. A valve push rod is fixedly installed on the side wall of the valve top plate. A dragging tooth is fixedly installed on the side wall of the valve push rod. The side wall of the dragging tooth meshes with the outer wall of the sliding tooth. A pressure reducing air hole is provided at the top of the push chamber. An air outlet pipe is fixedly installed on the side wall of the push chamber. A pipe support block is fixedly installed on the outer wall of the alkali inlet. A pneumatic box is fixedly installed at the top of the pipe support block. The pneumatic box is connected to the push chamber through the air outlet pipe. A fan blade is slidably connected inside the pneumatic box. The fan blade is slidably connected inside the alkali inlet.
[0012] Preferably, a fixed limiting block is fixedly installed at the top of the pushing cavity, a limiting slide post is slidably connected inside the fixed limiting block, a second spring is provided on the outer wall of the limiting slide post, a sliding protrusion plate is fixedly installed on the side wall of the second spring, a sliding protrusion post is fixedly installed at the top of the dragging tooth, the sliding protrusion post slides on the inner wall of the sliding protrusion plate, and a plurality of limiting holes are provided inside the rotating disk, the limiting slide post slides inside the limiting holes.
[0013] Preferably, a filter cleaning device is provided at the top of the pipe extension block. The filter cleaning device includes a placement box fixedly installed at the top of the pipe extension block. A filter cleaning column is rotatably connected inside the placement box. A push plate is fixedly installed on the inner wall of the filter cleaning column. A power column is rotatably installed on one side of the push plate. A plurality of adsorption holes are fixedly installed on the other side of the push plate. The power column is rotatably connected inside the placement box. A filter cleaning tube is rotatably connected inside the rotating disk. The adsorption holes slide on the inner wall of the filter cleaning tube.
[0014] Preferably, the outer wall of the pipe extension block is provided with a replacement device, the replacement device including a rotating column that is rolled on the inner wall of the pipe extension block, and a rotating disk is fixedly installed on the outer wall of the pipe extension block. The rotating disk is provided with multiple filter sliding grooves and limiting holes.
[0015] Preferably, any of the rotating disks is provided with a slidably connected flushing pipe inside, and a flushing nozzle is fixedly installed inside the flushing pipe. When the alkali filter pipe is replaced, there may be impurities and small clumps on the inner wall of the alkali inlet. The rotating column is rotated to a position that contacts the alkali inlet, and then water is filled into the flushing nozzle to flush the inner wall and valve of the alkali inlet, thereby cleaning the inside of the alkali inlet.
[0016] Preferably, the filter cleaning tube and the alkaline filter tube are threaded together at both ends. The filter cleaning tube and the alkaline filter tube slide on the inner wall of the filter screen sliding groove. After cleaning the filter cleaning tube and the alkaline filter tube, there may still be clumps and impurities between the alkaline filter blocks of the filter cleaning tube and the alkaline filter tube. Therefore, the two ends of the filter cleaning tube can be disassembled to clean the clumps and sand that have entered the filter screen.
[0017] The beneficial effects of this invention are as follows:
[0018] 1. The blast furnace gas pH adjustment device of the present invention effectively reduces the corrosion phenomenon of acidic gas containing chloride ions in the main blast furnace gas pipeline by means of an alkaline atomizing spray gun. The overall construction investment of this system is low, the operation effect is stable, and the amount of alkali used for blast furnace gas injection is small. An alkaline filter pipe is set at the front end of the alkaline flow pipeline to filter the alkaline liquid sprayed into the nozzle and prevent the nozzle from being blocked.
[0019] 2. The blast furnace gas pH adjustment device of the present invention, through a swirling centrifugal mist eliminator, has a better mist elimination and dehydration effect than the traditional packing ring mist eliminator, and can eliminate the common problems of alkaline corrosion and high water content in subsequent gas pipelines.
[0020] 3. The blast furnace gas pH adjustment device of the present invention improves the atomization effect of the alkali solution and reduces the problem of nozzle clogging by replacing the alkali solution filter tube after filtering out alkali impurities.
[0021] 4. The blast furnace gas pH adjustment device of the present invention can prevent the backflow of caking after filtration when replacing the alkali filter tube by means of a valve isolation device, so that the caking will not flow back into the pipeline. After replacing the alkali filter tube, there will be no backflow of caking to block the replaced alkali filter tube. Attached Figure Description
[0022] The invention will now be further described with reference to the accompanying drawings.
[0023] Figure 1 This is an overall external view of the invention;
[0024] Figure 2 This is a side view of the overall shape of the invention;
[0025] Figure 3 This is a cross-sectional view of the external structure of the present invention;
[0026] Figure 4 This is a cross-sectional view of the valve isolation device of the present invention;
[0027] Figure 5 This is a front view of the isolation valve of the present invention;
[0028] Figure 6 This is a partial structural diagram of the valve isolation device of the present invention;
[0029] Figure 7 This is a diagram of the automatic valve isolation closure of the present invention;
[0030] Figure 8 yes Figure 7 Enlarged view of point A;
[0031] Figure 9 This is a diagram of the limiting structure of the present invention;
[0032] Figure 10 yes Figure 9 Enlarged view at point B in the middle;
[0033] Figure 11 This is a structural diagram of the filter cleaning device of the present invention;
[0034] Figure 12 This is a cross-sectional view of the filter cleaning device of the present invention;
[0035] In the picture:
[0036] 1. Container body; 11. Container top; 12. Outlet pipe; 13. Inlet pipe;
[0037] 2. Alkali atomizing spray gun device; 21. Spray gun head; 22. Alkali flow pipe; 23. Alkali inlet; 231. Pipe protrusion; 2311. Pipe support block; 232. Pipe extension block; 233. Rotating column; 235. Filter block; 236. Alkali filter pipe; 2361. Alkali filter block; 238. Filter cleaning pipe; 239. Flushing pipe; 2391. Flushing nozzle; 24. Spray nozzle;
[0038] 3. Emergency water spray cooling device; 31. Water spray pipe; 32. Spray nozzle;
[0039] 4. Valve isolation device; 41. Sliding tooth; 42. Fixed rod; 421. First limiting block; 422. Second limiting block; 423. First spring; 43. Valve; 44. Pneumatic box; 441. Fan blade; 45. Air outlet pipe; 46. Push chamber; 47. Pressure reducing air port; 48. Driving tooth; 481. Valve push rod; 482. Valve top plate; 483. Sliding protrusion; 49. Limiting slide; 491. Second spring; 492. Sliding protrusion plate; 493. Fixed limiting block;
[0040] 5. Replacement device; 51. Rotary disc; 52. Limiting hole; 53. Filter screen sliding groove;
[0041] 6. Filter cleaning device; 61. Filter cleaning column; 62. Placement box; 63. Power column; 64. Push plate; 65. Adsorption hole;
[0042] 7. Cyclone centrifugal mist separation device; 71. Placement net; 72. Support column. Detailed Implementation
[0043] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0044] Example 1
[0045] like Figure 1-3 As shown in the embodiment of the present invention, a blast furnace gas pH adjustment device includes a housing 1. A housing top 11 is fixedly installed at the top of the housing 1, and an outlet pipe 12 is fixedly installed at the top of the housing top 11. An emergency water spray cooling device 3 is fixedly installed on the side wall of the housing 1. An inlet pipe 13 is fixedly installed on the lower side wall of the housing 1. An alkaline liquid atomizing spray gun device 2 is provided on the outer wall of the inlet pipe 13. The alkaline liquid atomizing spray gun device 2 includes a spray gun head 21 slidably installed on the side wall of the inlet pipe 13. A nozzle 24 is fixedly installed at one end of the spray gun head 21, and the other end of the spray gun head 21 flows with the alkaline liquid. The side walls of the pipe 22 are connected, and an alkali inlet 23 is fixedly installed at the end of the alkali flow pipe 22. An alkali filter pipe 236 is provided on the side wall of the alkali inlet 23. An alkali filter block 2361 is fixedly installed inside the alkali filter pipe 236. A pipe protrusion block 231 is fixedly installed on the outer wall of the alkali inlet 23. A pipe extension block 232 is fixedly installed on the side wall of the pipe protrusion block 231. A rotating column 233 is rotatably connected inside the pipe extension block 232. A rotating disk 51 is rotatably installed on the rotating column 233. The alkali inlet 23 slides on the inner wall of the rotating disk 51.
[0046] Specifically, when neutralizing the acidity of the high-chlorine gas entering the inlet pipe 13 by spraying alkali, the blast furnace gas inlet pipe 13 is opened to the alkali solution connected to the alkali solution inlet 23. The alkali solution then enters the alkali solution filter pipe 236 through the alkali solution inlet 23. The alkali solution filter pipe 236 is equipped with two alkali solution filter blocks 2361. When the alkali solution passes through the alkali solution filter blocks 2361, it filters out the clumps formed by the reaction of the alkali solution with air, preventing the alkali solution from flowing from the spray nozzle 21 into the nozzle 24 and clogging the nozzle 24. As the filtration time increases, many precipitated clumps will be filtered inside the alkali solution inlet 23, causing blockage of the alkali solution filter blocks 2361 inside the alkali solution filter pipe 236. To ensure that the nozzle 24 sprays alkali solution normally during use, the alkali solution inlet 23 can be further modified. The device reduces the difficulty of disassembling the nozzle 24. When replacing the alkali inlet 23, the rotating column 233 is rotated, which drives the rotating disk 51 on the outer wall to rotate. The rotating disk 51 has multiple limiting holes 52 inside, and the alkali filter tube 236 is slidably installed inside the limiting holes 52. The alkali filter tube 236 is in contact with the alkali inlet 23. The rotation of the rotating disk 51 drives the alkali inlet 23 to adjust its position. After the filter screen inside the alkali inlet 23 is detached from the alkali inlet 23, it can be replaced. When using this device, the alkali atomizing spray gun device 2 reduces the corrosion of the inner wall of the outlet pipe 12 and the rear pipe containing chloride ions by acidic gas. The alkali filter tube 236 reduces the problem of nozzle 24 clogging. The alkali filter tube 236 can be replaced for easy reuse.
[0047] like Figure 3 As shown, the emergency water spray cooling device 3 includes multiple water spray nozzles 32 fixedly installed on the upper end of the housing 1, and water spray pipes 31 are fixedly installed at the ends of the water spray nozzles 32.
[0048] Specifically, lime-alkali solution droplets are sprayed into the inside of inlet pipe 13, using dilute Ca(OH)2 solution atomized into droplets with an average particle size of 100 μm (maximizing the specific surface area of the droplets) to promote the dissolution and neutralization of acid radical ions in the coal gas, and to fully absorb and neutralize Cl. - SO4 2- The gas contains acid radicals, and when neutralized, a large amount of heat is generated. Therefore, an emergency water spray cooling device 3 is installed inside the chamber 1. When high temperature is generated, water is introduced into the interior of the water spray pipe 31. The water flows out from the spray nozzle 32 on the side wall of the water spray pipe 31 and enters the interior of the chamber 1, thereby completing the cooling of the gas inside the chamber 1.
[0049] like Figure 3As shown, the interior of the housing 1 is equipped with a cyclone centrifugal de-fogging separation device 7. The cyclone centrifugal de-fogging separation device 7 includes a support column 72 fixedly installed at the bottom of the inner wall of the housing 1, and a placement net 71 is fixedly installed at the top of the support column 72.
[0050] Specifically, the acid-base balance salt mist after the reaction must be effectively captured; otherwise, the droplets will escape from the inside of the chamber 1, causing scale buildup and blockage of the neutralized salt inside the outlet pipe 12. Therefore, a support column 72 is fixedly installed on the inner wall at the bottom of the chamber 1, and a placement net 71 is fixedly installed on the top of the support column 72. The placement net 71 can capture the droplets. Gas-liquid separation is achieved by setting a cyclone centrifugal de-misting device 7 at the upper outlet end of the chamber 1. The higher the efficiency of the cyclone centrifugal de-misting device 7, the higher the cyclone flow speed and the higher the airflow resistance, thereby cooling the neutralized salt and preventing scale buildup after the gas flows into the outlet pipe 12.
[0051] like Figure 4-5 As shown, the alkali filter tube 236 has two fixed rods 42 internally connected by a rolling connection. A sliding tooth 41 is fixedly installed at the top of the fixed rod 42, and a first limiting block 421 is fixedly installed at the bottom of the sliding tooth 41. A first spring 423 is fixedly installed on the side wall of the first limiting block 421. A second limiting block 422 is fixedly installed at the top of the alkali filter tube 236, and the side wall of the second limiting block 422 is fixedly installed at the bottom of the first spring 423. A valve 43 is fixedly installed at the bottom of the fixed rod 42.
[0052] Specifically, when replacing the alkali inlet 23, considering that alkali solution is still flowing inside, the alkali solution switch needs to be closed and the solution left to stand. However, standing may cause sediment to clump and flow back with the alkali solution, and the filter screen may be blocked again after replacement. Therefore, fixing rods 42 are provided on the inner walls of both ends of the alkali inlet 23. A first limiting block 421 is fixedly connected to the outer wall of the fixing rod 42. A valve 43 is fixedly installed at the bottom end of the fixing rod 42, and a sliding tooth 41 is fixedly installed at the top end of the fixing rod 42. When it is necessary to close the alkali inlet 23, the sliding tooth 41 is rotated. The sliding tooth 41 drives the valve 43 fixedly connected to the bottom end to separate the alkali inside the alkali inlet 23 of the pipeline, preventing the alkali from flowing back and causing clumping. The sliding tooth 41 can drive the valve 43 to rotate, and the valve 43 can separate the inside of the pipeline. The first limit block 421 is fixedly installed with a first spring 423 on its side wall. If there is no force to rotate the sliding tooth 41, the rebound force of the first spring 423 can close the pipeline.
[0053] like Figure 6-8As shown, a valve isolation device 4 is fixedly installed at the top of the alkali flow pipe 22 away from the alkali flow pipe 22. The valve isolation device 4 includes a push chamber 46 fixedly installed at the top of the pipe protrusion 231. A valve top plate 482 is slidably connected inside the push chamber 46. A valve push rod 481 is fixedly installed on the side wall of the valve top plate 482. A dragging tooth 48 is fixedly installed on the side wall of the valve push rod 481. The side wall of the dragging tooth 48 meshes with the outer wall of the sliding tooth 41. A pressure reducing air hole 47 is provided at the top of the push chamber 46. An air outlet pipe 45 is fixedly installed on the side wall of the push chamber 46. A pipe support block 2311 is fixedly installed on the outer wall of the alkali inlet 23. A pneumatic box 44 is fixedly installed at the top of the pipe support block 2311. The pneumatic box 44 is connected to the push chamber 46 through the air outlet pipe 45. A fan blade 441 is slidably connected inside the pneumatic box 44. The fan blade 441 is slidably connected inside the alkali inlet 23.
[0054] Specifically, after the alkali inlet 23 is closed, the sliding tooth 41 is rotated. A fan blade 441 is located at the bottom of the pneumatic box 44. When the alkali flows inside the alkali inlet 23, it drives the fan blade 441 to rotate. The rotation of the fan blade 441 provides blowing power to the pneumatic box 44. The blowing power squeezed out by the air pressure inside the pneumatic box 44 is sent from the outlet pipe 45 to the push chambers 46 at both ends. A valve top plate 482 is located inside the push chamber 46. Therefore, the force blown out by the outlet pipe 45 can lift the valve top plate 482. Plate 482 drives valve push rod 481 and drag gear 48 to push, thereby driving sliding gear 41 to rotate. The rotation of sliding gear 41 can open or close the alkali inlet 23. This device automatically recognizes after the alkali inlet 23 is closed, thereby driving valve 43 to close. The inside of the push chamber 46 is provided with a pressure reducing air hole 47, which can prevent the air pressure from being too high and causing valve top plate 482 to fall out of the push chamber 46. The closing of valve 43 can prevent the alkali inside from accumulating and flowing back, causing the replaced filter screen to become clogged again.
[0055] like Figure 9-10 As shown, a fixed limiting block 493 is fixedly installed at the top of the pushing cavity 46. A limiting slide post 49 is slidably connected inside the fixed limiting block 493. A second spring 491 is provided on the outer wall of the limiting slide post 49. A sliding protrusion plate 492 is fixedly installed on the side wall of the second spring 491. A sliding protrusion post 483 is fixedly installed at the top of the dragging tooth 48. The sliding protrusion post 483 slides on the inner wall of the sliding protrusion plate 492. A plurality of limiting holes 52 are provided inside the rotating disk 51. The limiting slide post 49 slides inside the limiting holes 52.
[0056] Specifically, when replacing the filter screen inside the alkali inlet 23, if the sliding of the rotating disk 51 is not restricted, the rotating disk 51 will rotate, causing the filter screen to fall out of the alkali inlet 23. Therefore, the inside of the pushing cavity 46 is connected to a fixed limiting block 493. In use, the limiting slide 49 moves away from the rotating disk 51 under the action of the second spring 491, while the sliding protrusion plate 492 moves closer to the rotating disk 51 under the action of the sliding protrusion 483. This causes the limiting slide 49 to fit with the limiting hole 52 inside the rotating disk 51, thereby limiting the rotating disk 51 and preventing it from rotating under the action of gravity during use. The limiting slide 49 can limit the rotating disk 51, while the sliding protrusion 483 and the sliding protrusion plate 492 can change the position of the limiting slide 49 according to the moving position of the dragging tooth 48.
[0057] like Figure 11-12 As shown, a filter cleaning device 6 is provided at the top of the pipe extension block 232. The filter cleaning device 6 includes a placement box 62 fixedly installed at the top of the pipe extension block 232. A filter cleaning column 61 is rotatably connected inside the placement box 62. A push plate 64 is fixedly installed on the inner wall of the filter cleaning column 61. A power column 63 is rotatably installed on one side of the push plate 64. A plurality of adsorption holes 65 are fixedly installed on the other side of the push plate 64. The power column 63 is rotatably connected inside the placement box 62. A filter cleaning tube 238 is rotatably connected inside the rotating disk 51. The adsorption holes 65 slide on the inner wall of the filter cleaning tube 238.
[0058] Specifically, the replacement alkali filter tube 236 is rotated to the position of the filter cleaning column 61. The rotating disk 51 is equipped with a filter cleaning tube 238, and a filter screen 235 is fixedly installed on the inner wall of the filter cleaning tube 238. When it is necessary to clean the inside of the filter screen 235, the power column 63 is rotated. The power column 63 slides inside the placement box 62, thereby driving the adsorption hole 65 to move towards the position of the filter screen 235. The adsorption hole 65 can clean and adsorb the clumps stuck inside the filter screen 235, thereby maintaining the filtration function inside the filter screen 235 and improving the use effect.
[0059] like Figure 12 As shown, the outer wall of the pipe extension block 232 is provided with a replacement device 5. The replacement device 5 includes a rotating column 233 that is rolled on the inner wall of the pipe extension block 232. A rotating disk 51 is fixedly installed on the outer wall of the pipe extension block 232. The rotating disk 51 is provided with multiple filter sliding grooves 53 and limiting holes 52 inside.
[0060] Specifically, the rotating disk 51 is fixedly installed on the outer wall of the rotating column 233. The rotating disk 51 is provided with a limiting hole 52 and a filter sliding groove 53. When rotating the rotating disk 51, the rotating column 233 can be rotated first. The limiting hole 52 and the filter sliding groove 53 can be used to limit the rotation disk 51.
[0061] like Figure 12 As shown, a flushing pipe 239 is slidably connected inside any of the rotating disks 51, and a flushing nozzle 2391 is fixedly installed inside the flushing pipe 239.
[0062] Specifically, after the alkali filter tube 236 is replaced, there may be impurities and small clumps on the inner wall of the alkali inlet 23. Rotate the rotating column 233 until it contacts the alkali inlet 23, then fill the flushing nozzle 2391 with water, allowing the flushing nozzle 2391 to flush the inner wall of the alkali inlet 23 and the valve 43, thereby cleaning the inside of the alkali inlet 23.
[0063] like Figure 12 As shown, the filter cleaning tube 238 and the alkaline solution filter tube 236 are threaded together at both ends, and the filter cleaning tube 238 and the alkaline solution filter tube 236 slide on the inner wall of the filter screen sliding groove 53.
[0064] Specifically, after cleaning the filter cleaning tube 238 and the alkaline filter tube 236, there may still be clumps and impurities between the alkaline filter blocks 2361 of the filter cleaning tube 238 and the alkaline filter tube 236. Therefore, the two ends of the filter cleaning tube 238 can be disassembled to manually clean the clumps and sand that have entered the filter screen.
[0065] Working principle: When the high-chlorine gas entering the inlet pipe 13 is neutralized by alkali spraying, the blast furnace gas inlet pipe 13 is opened to connect the alkali solution to the alkali solution inlet 23. The alkali solution then enters the alkali solution filter pipe 236 through the alkali solution inlet 23. The alkali solution filter pipe 236 contains two alkali solution filter blocks 2361. When the alkali solution passes through the alkali solution filter blocks 2361, it filters out the clumps formed by the reaction of the alkali solution with air, preventing the alkali solution from flowing from the spray nozzle 21 into the nozzle 24 and clogging the nozzle 24. The clumps remain inside the alkali solution filter pipe 236. The filter pipe 236 solves the problem of precipitated clumps clogging the nozzle 24. As the filtration time increases, more precipitated clumps are filtered out inside the alkali solution inlet 23. The alkali filter block 2361 inside the liquid filter pipe 236 may become clogged. To ensure that the nozzle 24 sprays alkali solution normally during use, the alkali inlet 23 can be replaced to reduce the difficulty of disassembling the nozzle 24. When the alkali inlet 23 needs to be replaced, first close the pipe of the alkali inlet 23. After the alkali inlet 23 is closed, the bottom of the pneumatic box 44 is equipped with a fan blade 441. When the alkali solution flows inside the alkali inlet 23, it can drive the fan blade 441 to rotate. The rotation of the fan blade 441 can provide blowing power to the pneumatic box 44. The blowing power squeezed out by the air pressure inside the pneumatic box 44 is sent from the air outlet pipe 45 into the push chambers 46 at both ends. The push chamber 46 is equipped with a valve top plate 482. Therefore, the air outlet pipe 45 The force of the blown air can lift the valve top plate 482. The valve top plate 482 drives the valve push rod 481 and the dragging tooth 48 to push, thereby driving the sliding tooth 41 to rotate. The rotation of the sliding tooth 41 can open or close the alkali inlet 23. This device automatically recognizes the alkali inlet 23 after it is closed, thereby driving the valve 43 to close. The inside of the push chamber 46 is provided with a pressure reducing air hole 47 to prevent the air pressure from being too high, causing the valve top plate 482 to fall out of the push chamber 46. The closing of the valve 43 can prevent the alkali from clumping back and causing the replaced filter screen to clog again. The limiting slide column 49 moves away from the rotating disk 51 under the action of the second spring 491, while the sliding protrusion plate 492 moves towards the sliding protrusion column 483 under the action of the sliding protrusion column 483. The position of the rotating disk 51 is moved, thereby causing the limiting slide 49 to engage with the limiting hole 52 inside the rotating disk 51, thus limiting the rotating disk 51 and preventing it from rotating under gravity during use. The limiting slide 49 can limit and open the rotating disk 51. After opening, the rotating disk 51 and the alkali filter tube 236 can be replaced. Rotating the rotating column 233 causes the rotating disk 51 on the outer wall to rotate. The rotation of the rotating disk 51 causes the alkali inlet 23 to adjust its position. The replaced alkali filter tube 236 is rotated to the position of the filter cleaning column 61. The rotating disk 51 is equipped with a filter cleaning tube 238, and a filter screen 235 is fixedly installed on the inner wall of the filter cleaning tube 238.When cleaning the inside of the filter screen 235 is required, rotate the power column 63. The power column 63 slides inside the placement box 62, thereby moving the adsorption hole 65 towards the position of the filter screen 235. The adsorption hole 65 can clean and adsorb the clumps stuck inside the filter screen 235 and the alkali filter tube 236, thus maintaining the filtration function inside the filter screen 235 and the alkali filter tube 236. After cleaning the filter cleaning tube 238 and the alkali filter tube 236, there may still be sand and clumps inside the pipes between the alkali filter blocks 2361 of the filter cleaning tube 238 and the alkali filter tube 236. Therefore, the two ends of the filter cleaning tube 238 can be disassembled to manually clean the clumps and sand that have entered the filter screen. When the alkali filter tube 236 is replaced, there may be impurities and small clumps on the inner wall of the alkali inlet 23. Rotate the rotating column 233 to the position where it contacts the alkali inlet 23, and then spray the flushing spray. The head 2391 is filled with water, allowing the flushing nozzle 2391 to flush the inner wall of the alkali inlet 23 and the valve 43, thereby cleaning the inside of the alkali inlet 23 and completing the replacement of the filter screen. After that, the dechlorinated blast furnace gas enters the box 1. The box 1 is equipped with an emergency water spray cooling device 3. When high temperature is generated, water is introduced into the water spray pipe 31. The water flows out from the spray nozzle 32 on the side wall of the water spray pipe 31 and enters the box 1, thereby cooling the gas inside the box 1. A support column 72 is fixedly installed on the inner wall of the bottom of the box 1, and a placement net 71 is fixedly installed on the top of the support column 72. The placement net 71 can capture the mist droplets. Gas-liquid separation is achieved by setting a cyclone centrifugal de-misting device 7 at the upper outlet end of the box 1. The higher the efficiency of the cyclone centrifugal de-misting device 7, the higher the cyclone speed and the higher the airflow resistance, thereby cooling the neutralized salt and preventing salt scaling after the gas flows into the outlet pipe 12. ,
[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A device for adjusting the pH of blast furnace gas, comprising a box (1), characterized in that: A box top (11) is fixedly installed at the top of the box body (1), and an outlet pipe (12) is fixedly installed at the top of the box top (11). An emergency water spray cooling device (3) is fixedly installed on the side wall of the box body (1). An inlet pipe (13) is fixedly installed on the lower side wall of the box body (1). An alkaline liquid atomizing spray gun device (2) is provided on the outer wall of the inlet pipe (13). The alkaline liquid atomizing spray gun device (2) includes a spray gun head (21) that is slidably installed on the side wall of the inlet pipe (13). A nozzle (24) is fixedly installed at one end of the spray gun head (21). The other end of the spray gun head (21) is connected to the side wall of the alkaline liquid flow pipe (22). An alkaline liquid inlet (23) is fixedly installed at the end of the alkaline liquid flow pipe (22). An alkaline liquid filter pipe (236) is provided on the side wall of the alkaline liquid inlet (23). An alkaline filter block (2361) is fixedly installed inside the alkaline filter tube (236). A pipe protrusion (231) is fixedly installed on the outer wall of the alkaline inlet (23). A pipe extension block (232) is fixedly installed on the side wall of the pipe protrusion (231). A rotating column (233) is tumbled inside the pipe extension block (232). A rotating disk (51) is tumbled on the rotating column (233). A replacement device (5) is provided on the outer wall of the pipe extension block (232). The replacement device (5) includes a rotating column (233) tumbled on the inner wall of the pipe extension block (232). A rotating disk (51) is fixedly installed on the outer wall of the pipe extension block (232). A plurality of filter sliding grooves (53) and limiting holes (52) are provided inside the rotating disk (51). The filter cleaning tube (238) and the alkaline solution filter tube (236) are threaded together at both ends, and the filter cleaning tube (238) and the alkaline solution filter tube (236) slide on the inner wall of the filter screen sliding groove (53).
2. A device for adjusting the pH of blast furnace gas according to claim 1, characterized in that: The emergency water spray cooling device (3) includes multiple water spray nozzles (32) fixedly installed on the upper end of the box (1), and water spray pipes (31) are fixedly installed at the ends of the water spray nozzles (32).
3. The blast furnace gas pH adjustment device according to claim 2, characterized in that: The interior of the box (1) is provided with a cyclone centrifugal de-fogging separation device (7), which includes a support column (72) fixedly installed at the bottom of the inner wall of the box (1), and a placement net (71) is fixedly installed at the top of the support column (72).
4. The blast furnace gas pH adjustment device according to claim 3, characterized in that: The alkaline filter tube (236) has two fixed rods (42) internally connected by a rolling connection. A sliding tooth (41) is fixedly installed at the top of the fixed rod (42), and a first limiting block (421) is fixedly installed at the bottom of the sliding tooth (41). A first spring (423) is fixedly installed on the side wall of the first limiting block (421). A second limiting block (422) is fixedly installed at the top of the alkaline filter tube (236), and the side wall of the second limiting block (422) is fixedly installed at the bottom of the first spring (423). A valve (43) is fixedly installed at the bottom of the fixed rod (42).
5. The blast furnace gas pH adjustment device according to claim 4, characterized in that: A valve isolation device (4) is fixedly installed at the top end away from the alkaline solution flow pipe (22). The valve isolation device (4) includes a push chamber (46) fixedly installed at the top end of the pipe protrusion (231). A valve top plate (482) is slidably connected inside the push chamber (46). A valve push rod (481) is fixedly installed on the side wall of the valve top plate (482). A dragging tooth (48) is fixedly installed on the side wall of the valve push rod (481). The side wall of the dragging tooth (48) meshes with the outer wall of the sliding tooth (41). The push chamber ( The top of the push chamber (46) is provided with a pressure reducing air hole (47). An air outlet pipe (45) is fixedly installed on the side wall of the push chamber (46). A pipe support block (2311) is fixedly installed on the outer wall of the alkali inlet (23). A pneumatic box (44) is fixedly installed on the top of the pipe support block (2311). The pneumatic box (44) is connected to the push chamber (46) through the air outlet pipe (45). A fan blade (441) is tumblingly connected inside the pneumatic box (44). The fan blade (441) is tumblingly connected inside the alkali inlet (23).
6. The blast furnace gas pH adjustment device according to claim 5, characterized in that: A fixed limiting block (493) is fixedly installed at the top of the pushing cavity (46). A limiting slide column (49) is slidably connected inside the fixed limiting block (493). A second spring (491) is provided on the outer wall of the limiting slide column (49). A sliding protrusion plate (492) is fixedly installed on the side wall of the second spring (491). A sliding protrusion column (483) is fixedly installed at the top of the dragging tooth (48). The sliding protrusion column (483) slides on the inner wall of the sliding protrusion plate (492). A plurality of limiting holes (52) are provided inside the rotating disk (51). The limiting slide column (49) slides inside the limiting holes (52).
7. A blast furnace gas pH adjustment device according to claim 6, characterized in that: A filter cleaning device (6) is provided at the top of the pipe extension block (232). The filter cleaning device (6) includes a placement box (62) fixedly installed at the top of the pipe extension block (232). A filter cleaning column (61) is rotatably connected inside the placement box (62). A push plate (64) is fixedly installed on the inner wall of the filter cleaning column (61). A power column (63) is rotatably installed on one side of the push plate (64). A plurality of adsorption holes (65) are fixedly installed on the other side of the push plate (64). The power column (63) is rotatably connected inside the placement box (62). A filter cleaning tube (238) is rotatably connected inside the rotating disk (51). The adsorption holes (65) slide on the inner wall of the filter cleaning tube (238).
8. A blast furnace gas pH adjustment device according to claim 7, characterized in that: The interior of any of the rotating disks (51) is provided with a slidably connected flushing pipe (239), and a flushing nozzle (2391) is fixedly installed inside the flushing pipe (239).