Rotary cement kiln dry denitration equipment based on environmental protection engineering

Abstract

The invention relates to the technical field of waste gas purification, and discloses rotary cement kiln dry denitration equipment based on environmental protection engineering, which is used for denitrating flue gas generated when a rotary cement kiln is used, and comprises a denitration tower used for collecting the flue gas; the flue gas inlet pipeline is fixedly connected to the rear side surface of the denitration tower and is used for conveying flue gas generated in the rotary cement kiln into the denitration tower; the exhaust port is fixedly connected to the lower surface of the denitration tower; the catalyst layers are fixedly connected to the inner wall of the denitration tower, and the multiple catalyst layers are arranged in an up-down array mode and used for catalyzing a reducing agent or urea and promoting the denitration efficiency of flue gas; the ammonia spraying box is arranged above the catalyst layer, in the moving process of the ammonia spraying box, a reducing agent is evenly sprayed on the catalyst layer through the spraying heads, the reducing agent can make full contact with flue gas, and the denitration efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification, and specifically to a dry denitration device for a cement rotary kiln based on environmental protection engineering. Background Art

[0002] During the cement production process, a large amount of nitrogen oxides are generated by the high-temperature combustion of the rotary kiln, seriously polluting the atmospheric environment. To meet the increasingly strict environmental protection standards, dry denitration technology has been widely used. Traditional dry denitration technologies mostly directly spray reducing agents such as ammonia water or urea solution into the rotary kiln preheater or decomposition furnace. Although this method is simple to operate, there are problems such as low denitration efficiency and the need to precisely control the ammonia dosage to prevent ammonia escape.

[0003] The patent with the publication number CN222598534U discloses a dry denitration device for a cement rotary kiln. The patent includes a device main body, a circulation box fixedly connected to the device main body, a circulation base fixedly connected inside the circulation box, a circulation pump fixedly connected to the circulation base, a circulation pipe fixedly connected to the circulation pump, a circulation output pipe fixedly connected to the circulation pump, a circulation solenoid valve arranged on the circulation pump, a water tank fixedly connected to the device main body, a cooling and distillation box fixedly connected to the device main body, an ammonia gas input pipe fixedly connected to the cooling and distillation box, a condenser fixedly connected to the ammonia gas input pipe, a liquid ammonia input pipe fixedly connected to the condenser, a liquid ammonia tank arranged on the device main body, and an exhaust pipe fixedly connected to the device main body, which has the effect of reducing environmental pollution. Although this patent solves the above problems, there are still problems such as low denitration efficiency as a traditional rotary kiln denitration method and difficulty in ensuring the qualification rate of flue gas emissions. Therefore, a dry denitration device for a cement rotary kiln based on environmental protection engineering is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a dry denitration device for a cement rotary kiln based on environmental protection engineering in view of the above deficiencies in the prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: A dry denitration device for a cement rotary kiln based on environmental protection engineering, used for denitrifying the flue gas generated when the cement rotary kiln is in use, includes: A denitration tower for collecting flue gas; An inlet flue gas pipe fixedly connected to the rear side of the denitration tower for conveying the flue gas generated in the cement rotary kiln into the denitration tower; An exhaust port fixedly connected to the lower surface of the denitration tower; The catalyst layer is fixedly connected to the inner wall of the denitration tower, and a plurality of catalyst layers are arranged in an up-and-down array to catalyze the reducing agent or urea, thereby promoting the denitration efficiency of the flue gas; The ammonia injection box is arranged above the catalyst layer and is used for spraying the reducing agent or urea onto the catalyst layer; The primary filter screen is arranged above the ammonia injection box and is used for filtering dust and alkaline substances in the flue gas to prevent the catalyst layer from being blocked; The dust collection bag is arranged below the primary filter screen and is used for centrally collecting dust.

[0006] As a further technical solution, the ammonia injection box includes: The nozzle is threadedly connected to the inner wall of the bottom end of the ammonia injection box; The infusion hose is fixedly connected to the front side of the ammonia injection box; The linear motor is fixedly connected to the inner wall of the front side of the denitration tower, and the lower surface of the ammonia injection box is fixedly connected to the moving end of the linear motor. The linear motor drives the ammonia injection box to reciprocate left and right; The contraction frame is fixedly connected to the front side of the denitration tower. The contraction frame is used for storing the infusion hose to prevent the infusion hose from dragging. A twisting roller is rotatably connected to the inner wall of the contraction frame, and a limiting roller is rotatably connected to the inner wall of the contraction frame.

[0007] As a further technical solution, the ammonia injection box further includes: The slide rail is fixedly connected to the inner wall of the denitration tower, and a limiting pulley is slidably connected to the inner surface of the slide rail; The triangular flow guide block is fixedly connected to the bottom of the inner wall of the ammonia injection box. A liquid storage baffle is fixedly connected to the upper surface of the triangular flow guide block. The reducing agent flows onto the inclined surface of the triangular flow guide block through the infusion hose and quickly flows to the rear end of the ammonia injection box along the inclined surface. The liquid level of the reducing agent continuously rises and flows into the nozzle through the notch at the top of the liquid storage baffle; The support plate is fixedly connected to the upper surface of the ammonia injection box.

[0008] As a further technical solution, a torsion spring is arranged at the hinge joint between the contraction frame and the twisting roller. The surface of the infusion hose abuts against the circumferential surface of the twisting roller, and the surface of the infusion hose abuts against the circumferential surface of the limiting roller. The rear end of the infusion hose penetrates out of the contraction frame, and the limiting pulley is fixedly connected to the upper surface of the ammonia injection box.

[0009] As a further technical solution, the primary filter screen includes: The partition plate is fixedly connected to the inner wall of the denitration tower, and the partition plate is fixedly connected to the front and rear sides of the primary filter screen; A rotating rod is rotatably connected to the inner surface of the support plate, and a brush roller is fixedly connected to the circumferential surface of the rotating rod. The brush roller is used to sweep away dust adhered to the primary filter screen.

[0010] As a further technical solution, the primary filter further includes: The abutment plate is fixedly connected to the inner wall of the denitrification tower, the upper surface of the abutment plate abuts against a roller, the roller and the circumferential surface of the rotating rod are fixedly connected, and the top of the abutment plate is a rough surface, the roller and the rough surface of the abutment plate rub against each other and drive the rotating rod to rotate.

[0011] The material receiving frame is fixedly connected to both sides of the support plate. The material receiving frame is used to receive the falling dust. The upper surface of the material receiving frame is fixedly connected to a friction curved plate, and the right side of the friction curved plate is a rough surface. After the brush roller rubs with the friction curved plate, the dust adhered to the inside is scraped into the material receiving frame.

[0012] As a further technical solution, the primary filter is fixedly connected to both sides of the inner wall of the denitrification tower, the brush roller abuts against the lower surface of the primary filter, and the brush roller abuts against the right side of the friction plate.

[0013] As a further technical solution, the dust collecting bag includes: The movable card frame is fixedly connected to the top of the dust bag, and the movable card frame abuts against the inner wall of the receiving frame. The dust bag is placed downward together with the receiving frame into the receiving frame. The dust bag can collect the dust that falls into the receiving frame and slides down. The movable card frame is provided with card slots on the front and back sides; The connecting plate is fixedly connected to the side of the support plate close to the dust bag. An arc-shaped positioning block is fixedly connected to the top of the connecting plate. After the movable card frame is placed in the material receiving frame, the card slot docks with the arc-shaped positioning block to fix the movable card frame.

[0014] As a further technical solution, the dust collecting bag further includes: A sliding rod is slidably connected to the inner surface of the material receiving frame, the right end of the sliding rod is fixedly connected to a contact plate, the circumferential surface of the sliding rod is fixedly connected to an oscillation plate, and a groove is provided on the right side of the inner wall of the denitrification tower. The oscillation plate knocks the material receiving frame so that the dust adhered to the inner wall of the material receiving frame quickly falls into the dust collecting bag; The friction sleeve shaft is fixedly connected to the left side of the inner wall of the material receiving frame, and the left end of the sliding rod abuts against the inner wall of the friction sleeve shaft.

[0015] As a further technical solution, a spring is provided between the right side of the material receiving frame and the left side of the resistance plate. The circumferential surface of the resistance plate is slidably connected to the groove opened on the right side of the inner wall of the denitrification tower. The connecting plate and the side of the material receiving frame close to the support plate are fixedly connected.

[0016] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. This cement rotary kiln dry denitrification equipment based on environmental protection engineering, the ammonia injection box sprays the reducing agent evenly on the catalyst layer through the nozzle during movement, so that the reducing agent can fully contact the flue gas, improving the denitrification efficiency. After the reducing agent liquid level is higher than the liquid storage baffle, it can flow into multiple nozzles at the same time from the slot at the top of the liquid storage baffle, preventing some nozzles from being unable to spray reducing agent during the movement of the ammonia injection box, resulting in uneven reducing agent spraying and affecting the reaction efficiency of the flue gas and reducing agent.

[0017] 2. In this cement rotary kiln dry denitrification equipment based on environmental protection projects, the brush roller inserts the bristles into the mesh of the primary filter through friction, and the dust stuck in the primary filter is scraped off, thereby avoiding the blockage of the primary filter and affecting the flow efficiency of the flue gas.

[0018] 3. This cement rotary kiln dry denitrification equipment based on environmental protection engineering uses a rotating rod to drive the brush roller to rotate, which increases the contact area between the entire circumference of the brush roller and the primary filter screen, preventing dust from concentrating on one side of the brush roller and affecting the scraping efficiency. While the brush roller rotates, it contacts the rough surface of the friction plate. The bristles vibrate due to the influence of friction, causing the dust between the gaps between the bristles to fall into the material receiving frame, allowing the brush roller to continuously and effectively scrape the primary filter screen.

[0019] 4. This cement rotary kiln dry denitrification equipment based on environmental protection engineering can quickly clean up the dust by removing the movable card frame and dust bag from the receiving frame. It has high installation and disassembly efficiency and is easy to operate. After aligning the card slot with the arc-shaped positioning block, lower the movable card frame and insert the arc-shaped positioning block into the card slot. At this time, the arc-shaped positioning block will clamp the movable card frame to improve installation stability.

[0020] 5. In this cement rotary kiln dry denitrification equipment based on environmental protection engineering, the inner wall of the receiving frame hits the left end of the slide bar and generates vibration to shake off the dust adhering to the inner wall of the receiving frame. The slide bar and the contact plate eject to the right and reset. The slide bar then drives the oscillation plate to move quickly to the right and knock on the receiving frame, causing the receiving frame to vibrate twice, thereby improving the efficiency of shaking off the dust, thereby promoting the efficiency of dust collection and the convenience of treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the front side three-dimensional half-section structure of the present invention; Figure 3 This is a schematic diagram of a front side three-dimensional half-section structure of the shrinkage frame of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of A; Figure 5 This is a schematic diagram of the front side three-dimensional half-section structure of the ammonia injection box of the present invention; Figure 6 This is a schematic diagram of a half-section structure of the front side of the primary filter screen of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of B; Figure 8 This is a schematic diagram of a three-dimensional half-section structure of the front side of the dust collecting bag of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of C in the middle; Figure 10 It is a schematic diagram of the front side three-dimensional structure of the movable card frame of the present invention.

[0022] In the figure: 1. Denitrification tower; 2. Smoke inlet pipe; 3. Exhaust port; 4. Catalyst layer; 5. Ammonia injection box; 6. Primary filter; 7. Dust bag; 51. Nozzle; 52. Infusion hose; 53. Linear motor; 54. Retraction frame; 55. Twisting roller; 56. Limiting roller; 57. Slide rail; 58. Limiting pulley; 59. Triangular guide block; 510. Liquid storage baffle; 511. Support plate; 61. Partition; 62. Rotating rod; 63. Brush roller; 64. Abutment plate; 65. Roller; 66. Material receiving frame; 67. Friction curved plate; 71. Movable card frame; 72. Connecting plate; 73. Arc positioning block; 74. Slide rod; 75. Abutment plate; 76. Friction sleeve; 77. Oscillation plate. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1-10 , one embodiment of the present invention is: a cement rotary kiln dry denitration equipment based on environmental protection engineering, comprising a denitration tower 1, the denitration tower 1 is used to collect flue gas; a smoke inlet pipe 2 is fixedly connected to the rear side of the denitration tower 1, for conveying the flue gas generated in the cement rotary kiln into the denitration tower 1; an exhaust port 3 is fixedly connected to the lower surface of the denitration tower 1; a catalyst layer 4 is fixedly connected to the inner wall of the denitration tower 1, and a plurality of catalyst layers 4 are arranged in an upper and lower array, for catalyzing the reducing agent or urea to promote the denitration efficiency of the flue gas; an ammonia injection box 5 is arranged above the catalyst layer 4, for spraying the reducing agent or urea onto the catalyst layer 4; a primary filter 6 is arranged above the ammonia injection box 5, for filtering dust and alkaline substances in the flue gas to prevent the catalyst layer 4 from being blocked; a dust bag 7 is arranged below the primary filter 6, for collecting dust in a centralized manner; In this embodiment, the high-temperature flue gas rises from the bottom to the top of the smoke inlet pipe 2 by buoyancy, and then flows into the denitration tower 1 from the top of the smoke inlet pipe 2. The flue gas in the smoke inlet pipe 2 continuously squeezes the flue gas in the denitration tower 1, causing the flue gas in the denitration tower 1 to flow downward. At this time, the reducing agent is sprayed onto the catalyst layer 4 through the ammonia injection box 5. Under the action of the catalyst layer 4 and the reducing agent, the flue gas efficiently reduces nitrogen oxides. Finally, the purified gas is discharged from the exhaust port 3. Compared with the traditional denitration method of directly injecting the reducing agent into the rotary kiln, the denitration efficiency of this device is higher, reducing the emission of atmospheric pollutants and ensuring the environmental protection of the cement rotary kiln.

[0025] In actual operation, during the process of the flue gas flowing downward in the denitration tower 1, it first comes into contact with the primary filter screen 6. At this time, the gas passes through the primary filter screen 6, while the dust in the flue gas is filtered by the primary filter screen 6, preventing the dust from flowing into the catalyst layer 4 with the flue gas and causing blockage of the catalyst layer 4, ensuring that the denitration efficiency of the catalyst layer 4 is not affected. Then the flue gas continues to flow downward through multiple catalyst layers 4 and reacts with the reducing agent. During the reaction process, the reducing agent is gradually absorbed by the catalyst layer 4, preventing excess ammonia from being discharged with the gas and improving the purification effect.

[0026] Furthermore, the ammonia injection box 5 includes a nozzle 51, which is threadedly connected to the inner wall of the bottom end of the ammonia injection box 5; an infusion hose 52 is fixedly connected to the front side of the ammonia injection box 5; a linear motor 53 is fixedly connected to the inner wall of the front side of the denitration tower 1, and the lower surface of the ammonia injection box 5 is fixedly connected to the moving end of the linear motor 53. The linear motor 53 drives the ammonia injection box 5 to move reciprocally left and right; a contraction frame 54 is fixedly connected to the front side of the denitration tower 1. The contraction frame 54 is used to store the infusion hose 52 to prevent the infusion hose 52 from dragging. A twisting roller 55 is rotatably connected to the inner wall of the contraction frame 54, and a limiting roller 56 is rotatably connected to the inner wall of the contraction frame 54.

[0027] In this embodiment, the nozzle 51 is installed at the bottom of the ammonia injection box 5, and the infusion hose 52 is fixed to the front end of the ammonia injection box 5. The reducing agent is input into the ammonia injection box 5 through the infusion hose 52. The linear motor 53 drives the ammonia injection box 5 and the nozzle 51 to move reciprocally left and right. During the movement of the ammonia injection box 5, the reducing agent is evenly sprayed onto the catalyst layer 4 through the nozzle 51, enabling the reducing agent to come into full contact with the flue gas and further improving the denitration efficiency.

[0028] In actual work, the infusion hose 52 is wound around the contraction frame 54 by twisting the roller 55 and the limiting roller 56. When the ammonia injection tank 5 moves to the right, it drives the stretching of the infusion hose 52, and at the same time makes the twisting roller 55 gradually tighten. When the ammonia injection tank 5 moves to the left, an extra section of the infusion hose 52 droops downward, and the twisting roller 55 gradually relaxes. At this time, the elasticity of the torsion spring drives the twisting roller 55 to rotate and reset, and the twisting roller 55 drives the infusion hose 52 to contract into the contraction frame 54 through friction, preventing the infusion hose 52 from dragging inside the device.

[0029] Furthermore, the ammonia injection tank 5 further includes a slide rail 57. The slide rail 57 is fixedly connected to the inner wall of the denitration tower 1. The inner surface of the slide rail 57 is slidably connected with a limiting pulley 58. The ammonia injection tank 5 moves more smoothly on the slide rail 57 through the limiting pulley 58; a triangular flow guide block 59 is fixedly connected to the bottom of the inner wall of the ammonia injection tank 5. A liquid storage baffle 510 is fixedly connected to the upper surface of the triangular flow guide block 59. The reducing agent flows onto the inclined surface of the triangular flow guide block 59 through the infusion hose 52 and quickly flows to the rear end of the ammonia injection tank 5 along the inclined surface. The liquid level of the reducing agent continuously rises and flows into the nozzle 51 through the notch at the top of the liquid storage baffle 510; a support plate 511 is fixedly connected to the upper surface of the ammonia injection tank 5. A torsion spring is arranged at the hinge joint of the contraction frame 54 and the twisting roller 55. The surface of the infusion hose 52 abuts against the circumferential surface of the twisting roller 55, and the surface of the infusion hose 52 abuts against the circumferential surface of the limiting roller 56. The rear end of the infusion hose 52 penetrates out of the contraction frame 54, and the limiting pulley 58 is fixedly connected to the upper surface of the ammonia injection tank 5.

[0030] In this embodiment, the ammonia injection tank 5 slides in the slide rail 57 through the limiting pulley 58. The limiting pulley 58 changes the sliding friction between the original ammonia injection tank 5 and the inner wall of the denitration tower 1 into the rolling friction between itself and the slide rail 57, thereby reducing the friction when the ammonia injection tank 5 moves and preventing the ammonia injection tank 5 from getting stuck during the moving process.

[0031] In actual work, the reducing agent flows into the ammonia injection tank 5 and flows backward through the inclined surface of the triangular flow guide block 59, so as to quickly fill the ammonia injection tank 5. After the liquid level of the reducing agent is higher than the liquid storage baffle 510, it can flow into multiple nozzles 51 simultaneously through the notch at the top of the liquid storage baffle 510, preventing some nozzles 51 from not being able to spray the reducing agent during the moving process of the ammonia injection tank 5, resulting in uneven spraying of the reducing agent and affecting the reaction efficiency between the flue gas and the reducing agent.

[0032] Working principle: Start the linear motor 53. The linear motor 53 drives the ammonia injection box 5 and the nozzle 51 to reciprocate left and right, and inputs the reducing agent into the ammonia injection box 5 through the infusion hose 52. During the movement of the ammonia injection box 5, the reducing agent inside is evenly sprayed onto the catalyst layer 4 through the nozzle 51. The catalyst layer 4 catalyzes the reducing agent to improve the reduction efficiency of nitrogen oxides. The flue gas flows downward from the top of the denitration tower 1. After contacting the primary filter screen 6, the dust in the flue gas is filtered out. The gas continues to flow downward through the primary filter screen 6 and contacts the catalyst layer 4 covered with the reducing agent on the surface for reaction, thereby achieving efficient denitration.

[0033] Please refer to Figures 1-10 , on the basis of the above embodiment, in another embodiment of the present invention, the primary filter screen 6 includes a partition plate 61. The partition plate 61 is fixedly connected to the inner wall of the denitration tower 1, and the partition plate 61 and the front and rear sides of the primary filter screen 6 are fixedly connected; the rotating rod 62 is rotatably connected to the inner surface of the support plate 511. A brush roller 63 is fixedly connected to the circumferential surface of the rotating rod 62. The brush roller 63 is used to sweep away the dust adhering to the primary filter screen 6.

[0034] In this embodiment, when the ammonia injection box 5 reciprocates, it drives the support plate 511 to reciprocate. The support plate 511 drives the rotating rod 62 and the brush roller 63 to reciprocate. When the brush roller 63 moves, it contacts the primary filter screen 6 and generates friction, thereby scraping the primary filter screen 6.

[0035] In actual work, the brush roller 63 inserts the bristles into the mesh holes of the primary filter screen 6 through friction, and the dust stuck in the primary filter screen 6 is scraped off, thereby avoiding the blockage of the primary filter screen 6 and affecting the flow efficiency of the flue gas.

[0036] Furthermore, the primary filter screen 6 further includes an abutting plate 64. The abutting plate 64 is fixedly connected to the inner wall of the denitration tower 1. A roller 65 is abutted on the upper surface of the abutting plate 64. The roller 65 is fixedly connected to the circumferential surface of the rotating rod 62. And the upper surface of the abutting plate 64 is a rough surface. The roller 65 rubs against the rough surface of the abutting plate 64 and drives the rotating rod 62 to rotate. The material receiving frame 66 is fixedly connected to both sides of the support plate 511. The material receiving frame 66 is used to receive the falling dust. A friction curved plate 67 is fixedly connected to the upper surface of the material receiving frame 66. And the right side of the friction curved plate 67 is a rough surface. The dust adhered to the inside of the brush roller 63 is scraped off into the material receiving frame 66 after rubbing against the friction curved plate 67. The primary filter screen 6 is fixedly connected to both sides of the inner wall of the denitration tower 1. The brush roller 63 abuts against the lower surface of the primary filter screen 6. The brush roller 63 abuts against the right side surface of the friction curved plate 67.

[0037] In this embodiment, when the rotating rod 62 reciprocates, it drives the roller 65 to reciprocate. During the movement of the roller 65, it contacts the rough surface of the abutting plate 64 and generates friction. Affected by the frictional force, the roller 65 rotates. The rotation of the roller 65 drives the rotating rod 62 to rotate, and the rotating rod 62 drives the brush roller 63 to rotate, increasing the contact area between the entire circumferential surface of the brush roller 63 and the primary filter screen 6, and preventing dust from concentrating on one side of the brush roller 63 and affecting the scraping efficiency.

[0038] During actual operation, the brush roller 63 rotates while reciprocating, and scrapes off the dust adhering to the primary filter screen 6. The dust falls into the gaps between the bristles. While the brush roller 63 rotates, it contacts the rough surface of the friction curved plate 67. Affected by the frictional force, the bristles vibrate, causing the dust in the gaps between the bristles to fall into the material receiving frame 66, completing the preliminary cleaning and collection of the dust, enabling the brush roller 63 to continuously and effectively scrape the primary filter screen 6, further preventing the primary filter screen 6 from being blocked, and the material receiving frame 66 catches the falling dust, preventing the cleaned dust from falling onto the catalyst layer 4.

[0039] Working principle: The support plate 511 drives the rotating rod 62 to reciprocate, the rotating rod 62 drives the brush roller 63 and the roller 65 to reciprocate. After the roller 65 rotates due to friction with the abutting plate 64, it drives the rotating rod 62 and the brush roller 63 to rotate, enabling the brush roller 63 to efficiently sweep off the dust stuck in the pores of the primary filter screen 6 and preventing the primary filter screen 6 from being blocked. The brush roller 63 rotates and contacts the rough surface of the friction curved plate 67, causing the dust in the gaps between the bristles to fall off, avoiding a reduction in the scraping effect of the brush roller 63. The falling dust is caught by the material receiving frame 66, preventing it from falling onto the catalyst layer 4.

[0040] Please refer to Figures 1-10 On the basis of the above embodiment, in another embodiment of the present invention, the dust collection bag 7 includes a movable clamping frame 71. The movable clamping frame 71 is fixedly connected to the top end of the dust collection bag 7. The movable clamping frame 71 abuts against the inner wall of the material receiving frame 66. The dust collection bag 7 is placed downward into the material receiving frame 66 together with the material receiving frame 66. The dust collection bag 7 can receive the dust that falls into the material receiving frame 66 and slides downward. Slots are provided on both the front and rear sides of the movable clamping frame 71; A connecting plate 72 is fixedly connected to one side of the support plate 511 close to the dust collection bag 7, and an arc-shaped positioning block 73 is fixedly connected above the connecting plate 72. After the movable clamping frame 71 is placed into the material receiving frame 66, the slot is docked with the arc-shaped positioning block 73 to fix the movable clamping frame 71.

[0041] In this embodiment, the dust collection bag 7 and the movable clamping frame 71 are placed into the material receiving frame 66 together. The dust collection bag 7 hangs down to the bottom end of the material receiving frame 66. The dust sliding down from the inclined surface of the inner wall of the material receiving frame 66 falls into the dust collection bag 7 and is concentrated. After the work is completed, the movable clamping frame 71 and the dust collection bag 7 are taken out of the material receiving frame 66, and the dust can be quickly cleaned up, and the installation and disassembly efficiency is high, and the operation is convenient.

[0042] In actual work, after the movable clamping frame 71 is placed in, it is resisted by the connecting plate 72 and is thus stuck at the bottom end of the material receiving frame 66. After the clamping slot is aligned with the arc-shaped positioning block 73, the movable clamping frame 71 is lowered so that the arc-shaped positioning block 73 is inserted into the clamping slot. At this time, the arc-shaped positioning block 73 clamps the movable clamping frame 71 to improve the installation stability.

[0043] Furthermore, the dust collecting bag 7 also includes a slide rod 74, which is slidably connected to the inner surface of the material receiving frame 66, and the right end of the slide rod 74 is fixedly connected to the contact plate 75. The circumferential surface of the slide rod 74 is fixedly connected to the oscillation plate 77. A groove is provided on the right side of the inner wall of the denitrification tower 1, and the oscillation plate 77 knocks on the material receiving frame 66 so that the dust adhered to the inner wall of the material receiving frame 66 quickly falls into the dust collecting bag 7; the friction sleeve shaft 76 is fixedly connected to the left side of the inner wall of the material receiving frame 66, and the left end of the slide rod 74 abuts against the inner wall of the friction sleeve shaft 76, a spring is provided between the right side of the material receiving frame 66 and the left side of the contact plate 75, the circumferential surface of the contact plate 75 is slidably connected to the groove provided on the right side of the inner wall of the denitrification tower 1, and the connecting plate 72 is fixedly connected to the side of the material receiving frame 66 close to the support plate 511.

[0044] In this embodiment, the support plate 511 drives the material receiving frame 66 to move back and forth. When the material receiving frame 66 drives the slide rod 74 to move to the right, the slide rod 74 and the contact plate 75 are inserted into the groove opened on the right side of the inner wall of the denitrification tower 1. When the contact plate 75 is resisted, the slide rod 74 stops moving. At this time, the material receiving frame 66 slides to the right relative to the slide rod 74, so that the slide rod 74 is inserted into the friction sleeve shaft 76, and the inner wall of the material receiving frame 66 hits the left end of the slide rod 74 and generates vibration to shake off the dust adhering to the inner wall of the material receiving frame 66.

[0045] In actual work, when the material receiving frame 66 moves to the left, it drives the slide bar 74 and the resistance plate 75 to withdraw from the groove opened on the right side of the inner wall of the denitrification tower 1. At this time, the elastic force of the spring is greater than the friction force between the slide bar 74 and the friction sleeve shaft 76, thereby driving the slide bar 74 and the resistance plate 75 to eject and reset to the right. The slide bar 74 then drives the oscillation plate 77 to move quickly to the right and knock on the material receiving frame 66, causing the material receiving frame 66 to produce secondary vibration, thereby improving the efficiency of shaking off the dust, and thereby promoting the efficiency of dust collection and the convenience of treatment.

[0046] Working principle: Align the slot on the movable card frame 71 with the arc-shaped positioning block 73 and then place it into the material receiving frame 66. The movable card frame 71 falls to the bottom of the material receiving frame 66, and the arc-shaped positioning block 73 is inserted into the slot. At this time, the dust collecting bag 7 hangs down at the bottom of the material receiving frame 66, and can collect the dust in the material receiving frame 66. After the flue gas is purified, the dust is quickly and centrally disposed of. The material receiving frame 66 moves left and right, driving the slide bar 74 to move left and right, so that the slide bar 74 and the contact plate 75 knock on the inner wall of the material receiving frame 66, causing the material receiving frame 66 to vibrate and shake off the dust adhered to its inner wall, thereby improving the dust collection efficiency.

[0047] The present invention provides a dry denitration device for a cement rotary kiln based on environmental protection engineering. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be realized by using the prior art.

Claims

1. A dry denitration device for a cement rotary kiln based on environmental protection engineering, characterized in that, For denitrification of the flue gas generated during the use of a cement rotary kiln, including: A denitrification tower (1), which is used to collect flue gas; An inlet flue gas pipe (2), which is fixedly connected to the rear side of the denitrification tower (1) and is used to transport the flue gas generated in the cement rotary kiln into the denitrification tower (1); An exhaust port (3), which is fixedly connected to the lower surface of the denitrification tower (1); A catalyst layer (4), which is fixedly connected to the inner wall of the denitrification tower (1), and a plurality of catalyst layers (4) are arranged in an upper and lower array, and are used to catalyze the reducing agent or urea to promote the denitrification efficiency of the flue gas; An ammonia injection box (5), which is arranged above the catalyst layer (4) and is used to spray the reducing agent or urea onto the catalyst layer (4); A primary filter screen (6), which is arranged above the ammonia injection box (5) and is used to filter dust and alkaline substances in the flue gas to prevent the catalyst layer (4) from being blocked; A dust collection bag (7), which is arranged below the primary filter screen (6) and is used to centrally collect dust.

2. The dry denitration equipment for a cement rotary kiln based on environmental protection engineering according to claim 1, characterized in that: The ammonia injection box (5) includes: A spray head (51), which is threadedly connected to the inner wall of the bottom end of the ammonia injection box (5); An infusion hose (52), which is fixedly connected to the front side of the ammonia injection box (5); A linear motor (53), which is fixedly connected to the inner wall of the front side of the denitrification tower (1), and the lower surface of the ammonia injection box (5) is fixedly connected to the moving end of the linear motor (53), and the linear motor (53) drives the ammonia injection box (5) to reciprocate left and right; A contraction frame (54), which is fixedly connected to the front side of the denitrification tower (1), and the contraction frame (54) is used to store the infusion hose (52) to prevent the infusion hose (52) from dragging. A twisting roller (55) is rotatably connected to the inner wall of the contraction frame (54), and a limiting roller (56) is rotatably connected to the inner wall of the contraction frame (54).

3. The dry denitration equipment for a cement rotary kiln based on environmental protection engineering according to claim 2, characterized in that: The ammonia injection box (5) further includes: A slide rail (57), which is fixedly connected to the inner wall of the denitrification tower (1), and a limiting pulley (58) is slidably connected to the inner surface of the slide rail (57); A triangular flow guiding block (59), which is fixedly connected to the bottom of the inner wall of the ammonia injection box (5), and a liquid storage baffle (510) is fixedly connected to the upper surface of the triangular flow guiding block (59). The reducing agent flows onto the inclined surface of the triangular flow guiding block (59) through the infusion hose (52) and quickly flows to the rear end of the ammonia injection box (5) along the inclined surface. The liquid level of the reducing agent continuously rises and flows into the spray head (51) through the notch at the top of the liquid storage baffle (510); A support plate (511), which is fixedly connected to the upper surface of the ammonia injection box (5).

4. The dry denitration equipment for a cement rotary kiln based on environmental protection engineering according to claim 3, characterized in that: A torsion spring is provided at the hinge joint of the contraction frame (54) and the twisting roller (55). The surface of the infusion hose (52) abuts against the circumferential surface of the twisting roller (55). The surface of the infusion hose (52) abuts against the circumferential surface of the limiting roller (56). The rear end of the infusion hose (52) penetrates through the contraction frame (54). The limiting pulley (58) is fixedly connected to the upper surface of the ammonia injection tank (5).

5. The dry denitration equipment for a cement rotary kiln based on environmental protection engineering according to claim 3, characterized in that: The primary filter (6) includes: A partition plate (61) fixedly connected to the inner wall of the denitration tower (1), and the partition plate (61) is fixedly connected to the front and rear sides of the primary filter (6); A rotating rod (62) rotatably connected to the inner surface of the support plate (511). A brush roller (63) is fixedly connected to the circumferential surface of the rotating rod (62). The brush roller (63) is used to sweep away the dust adhered to the primary filter (6).

6. The dry denitration equipment for a cement rotary kiln based on environmental protection engineering according to claim 4, characterized in that: The primary filter (6) further includes: An abutting plate (64) fixedly connected to the inner wall of the denitration tower (1). A roller (65) abuts against the upper surface of the abutting plate (64). The roller (65) is fixedly connected to the circumferential surface of the rotating rod (62). The upper surface of the abutting plate (64) above is a rough surface. The roller (65) rubs against the rough surface of the abutting plate (64) and drives the rotating rod (62) to rotate. A material receiving frame (66) fixedly connected to both sides of the support plate (511). The material receiving frame (66) is used to receive the falling dust. A friction curved plate (67) is fixedly connected to the upper surface of the material receiving frame (66). The right side of the friction curved plate (67) is a rough surface. The dust adhered to the inside of the brush roller (63) is scraped into the material receiving frame (66) after rubbing against the friction curved plate (67).

7. An environmentally friendly engineering-based dry denitration device for a cement rotary kiln according to claim 5, characterized in that, The primary filter (6) is fixedly connected to both sides of the inner wall of the denitration tower (1). The brush roller (63) abuts against the lower surface of the primary filter (6). The brush roller (63) abuts against the right side surface of the friction curved plate (67).

8. An environmentally friendly engineering-based dry denitration device for a cement rotary kiln according to claim 5, characterized in that: The dust collection bag (7) includes: A movable clamping frame (71) fixedly connected to the top end of the dust collection bag (7). The movable clamping frame (71) abuts against the inner wall of the material receiving frame (66). The dust collection bag (7) is placed downward together with the material receiving frame (66) into the material receiving frame (66). The dust collection bag (7) can receive the dust that falls into the material receiving frame (66) and slides downward. Card slots are provided on the front and rear sides of the movable clamping frame (71); A connecting plate (72) fixedly connected to one side of the support plate (511) close to the dust collection bag (7). An arc-shaped positioning block (73) is fixedly connected above the connecting plate (72). After the movable clamping frame (71) is placed into the material receiving frame (66), the card slot is docked with the arc-shaped positioning block (73) to fix the movable clamping frame (71).

9. An environmentally friendly engineering-based dry denitration device for a cement rotary kiln according to claim 6, characterized in that: The dust collection bag (7) further includes: A sliding rod (74), the sliding rod (74) is slidably connected to the inner surface of the material receiving frame (66), a contact plate (75) is fixedly connected to the right end of the sliding rod (74), an oscillating plate (77) is fixedly connected to the circumferential surface of the sliding rod (74), a groove is formed on the right side of the inner wall of the denitration tower (1), and the oscillating plate (77) knocks on the material receiving frame (66) to quickly drop the dust adhering to the inner wall of the material receiving frame (66) into the dust collection bag (7); A friction sleeve shaft (76), the friction sleeve shaft (76) is fixedly connected to the left side of the inner wall of the material receiving frame (66), and the left end of the sliding rod (74) abuts against the inner wall of the friction sleeve shaft (76).

10. A dry denitration device for a cement rotary kiln based on environmental protection engineering according to claim 7, characterized in that: A spring is arranged between the right side surface of the material receiving frame (66) and the left side surface of the contact plate (75), the circumferential surface of the contact plate (75) is slidably connected to the groove formed on the right side of the inner wall of the denitration tower (1), and the connecting plate (72) is fixedly connected to the side of the material receiving frame (66) close to the support plate (511).

Images