Cement rotary kiln dry denitration equipment based on environmental protection engineering

Abstract

The present application relates to the technical field of waste gas purification, and discloses a cement rotary kiln dry method denitration equipment based on environmental protection engineering, which is used for denitration of flue gas generated during use of a cement rotary kiln and comprises a denitration tower, which is used for collecting flue gas; a flue gas inlet pipeline, which is fixedly connected to the rear side of the denitration tower and is used for conveying the flue gas generated in the cement rotary kiln into the denitration tower; an exhaust port, which is fixedly connected to the lower surface of the denitration tower; a catalyst layer, which is fixedly connected to the inner wall of the denitration tower and is arranged in multiple layers on the catalyst layer; the catalyst layer is used for catalyzing a reducing agent or urea and promoting the denitration efficiency of the flue gas; and an ammonia spraying box, which is arranged above the catalyst layer, in the present application, the ammonia spraying box sprays the reducing agent uniformly on the catalyst layer through the spray head during movement, so that the reducing agent can fully contact with the flue gas, and the denitration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas purification, in particular to a cement rotary kiln dry denitrification equipment based on environmental protection engineering. BACKGROUND

[0002] In the cement production process, high temperature combustion of the rotary kiln can generate a large amount of nitrogen oxides, which seriously pollutes the atmospheric environment. In order to meet the increasingly stringent environmental protection standards, dry denitrification technology is widely used. The traditional dry denitrification technology is to directly spray ammonia water or urea solution into the preheater or decomposing furnace of the rotary kiln. Although this method is simple to operate, it has the problems of low denitrification efficiency and the need for precise control of ammonia dosage to prevent ammonia escape.

[0003] Patent No. CN222598534U discloses a cement rotary kiln dry denitrification equipment, which comprises a device main body, a circulating box fixedly connected to the device main body, a circulating base fixedly connected inside the circulating box, a circulating pump fixedly connected to the circulating base, a circulating pipe fixedly connected to the circulating pump, a circulating output pipe fixedly connected to the circulating pump, a circulating electromagnetic valve arranged on the circulating pump, a water tank fixedly connected to the device main body, a cooling distillation tank fixedly connected to the device main body, an ammonia gas input pipe fixedly connected to the cooling distillation tank, 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. The equipment has the effect of reducing environmental pollution. Although the above-mentioned problems are solved, the traditional rotary kiln denitrification method still has the problems of low denitrification efficiency and difficulty in ensuring the qualified rate of flue gas emission. Therefore, a cement rotary kiln dry denitrification equipment based on environmental protection engineering is proposed to solve the above-mentioned problems. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a cement rotary kiln dry denitrification equipment based on environmental protection engineering to solve the problems in the prior art.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a cement rotary kiln dry denitrification equipment based on environmental protection engineering is used for denitrification of flue gas generated during the use of a cement rotary kiln, which comprises:

[0006] A denitrification tower is used for collecting flue gas.

[0007] An inlet flue gas pipeline is fixedly connected to the rear side of the denitrification tower and is used for conveying flue gas generated in the cement rotary kiln into the denitrification tower.

[0008] An exhaust port is fixedly connected to the lower surface of the denitrification tower.

[0009] A catalyst layer is fixedly connected to the inner wall of the denitration tower, and a plurality of catalyst layers are arranged in an array upward and downward, for catalyzing the reducing agent or urea, and promoting the denitration efficiency of the flue gas;

[0010] An ammonia injection tank is arranged above the catalyst layer, for spraying the reducing agent or urea onto the catalyst layer;

[0011] A primary filter screen is arranged above the ammonia injection tank, for filtering the dust and alkaline substances in the flue gas, and preventing the catalyst layer from being blocked;

[0012] A dust collection bag is arranged below the primary filter screen, for collecting the dust.

[0013] As a further technical solution, the ammonia injection tank comprises:

[0014] A spray head is threadedly connected to the inner wall of the bottom end of the ammonia injection tank;

[0015] An infusion hose is fixedly connected to the front side of the ammonia injection tank;

[0016] A 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 tank and the moving end of the linear motor are fixedly connected, and the linear motor drives the ammonia injection tank to move back and forth left and right;

[0017] A retractable frame is fixedly connected to the front side of the denitration tower, and the retractable frame is used for accommodating the infusion hose, preventing the infusion hose from being dragged, the inner wall of the retractable frame is rotatably connected to a twisting roller, and the inner wall of the retractable frame is rotatably connected to a limiting roller.

[0018] As a further technical solution, the ammonia injection tank further comprises:

[0019] A slide rail is fixedly connected to the inner wall of the denitration tower, and the inner surface of the slide rail is slidably connected to a limiting pulley;

[0020] A triangular flow guide block is fixedly connected to the bottom of the inner wall of the ammonia injection tank, and the upper surface of the triangular flow guide block is fixedly connected to a liquid storage baffle, the reducing agent flows onto the inclined surface of the triangular flow guide block through the infusion hose, and flows quickly along the inclined surface to the rear end of the ammonia injection tank, the liquid surface of the reducing agent continuously rises and flows into the spray head through the slot at the top end of the liquid storage baffle;

[0021] A support plate is fixedly connected to the upper surface of the ammonia injection tank.

[0022] As a further technical scheme, the contraction frame and the torsion roller hinge are provided with a torsion spring, the surface of the infusion hose and the circumference of the torsion roller are in abutment, the surface of the infusion hose and the circumference of the limiting roller are in abutment, the rear end of the infusion hose penetrates out of the contraction frame, and the limiting pulley and the upper surface of the ammonia injection tank are fixedly connected.

[0023] As a further technical scheme, the primary filter screen comprises:

[0024] A partition is fixedly connected to the inner wall of the denitration tower, and the partition is fixedly connected to the front and rear sides of the primary filter screen;

[0025] A rotating rod is rotatably connected to the inner surface of the support plate, and the circumference of the rotating rod is fixedly connected with a brush roller, which is used to sweep away dust adhered in the primary filter screen.

[0026] As a further technical scheme, the primary filter screen further comprises:

[0027] An abutment plate is fixedly connected to the inner wall of the denitration tower, and the upper surface of the abutment plate is in abutment with a roller, which is fixedly connected to the circumference of the rotating rod, and the upper surface of the abutment plate is rough, and the roller rubs against the rough surface of the abutment plate to drive the rotating rod to rotate.

[0028] A material receiving frame is fixedly connected to the two sides of the support plate, and the material receiving frame is used to receive falling dust, and the upper surface of the material receiving frame is fixedly connected with a friction curved plate, and the right side of the friction curved plate is rough, and the dust adhered inside the brush roller is scraped off into the material receiving frame after rubbing against the friction curved plate.

[0029] As a further technical scheme, the primary filter screen and the inner wall of the denitration tower are fixedly connected on both sides, the brush roller is in abutment with the lower surface of the primary filter screen, and the brush roller is in abutment with the right side of the friction curved plate.

[0030] As a further technical scheme, the dust collecting bag comprises:

[0031] A movable clamping frame is fixedly connected to the top end of the dust collecting bag, the movable clamping frame is in abutment with the inner wall of the material receiving frame, the dust collecting bag is placed into the material receiving frame together with the material receiving frame, the dust collecting bag can receive dust falling into the material receiving frame and sliding downward, and clamping grooves are formed in the front and rear sides of the movable clamping frame.

[0032] A connecting plate is fixedly connected to one side of the support plate close to the dust collecting bag, and an arc-shaped positioning block is fixedly connected above the connecting plate, the clamping grooves are in butt joint with the arc-shaped positioning block after the movable clamping frame is placed into the material receiving frame, so that the movable clamping frame is fixed.

[0033] As a further technical scheme, the dust collecting bag further comprises:

[0034] A sliding rod is slidably connected to the inner surface of the receiving frame. A contact plate is fixedly connected to the right end of the sliding rod. A vibrating plate is fixedly connected to the circumferential surface of the sliding rod. A groove is opened on the right side of the inner wall of the denitrification tower. The vibrating plate strikes the receiving frame, causing the dust adhering to the inner wall of the receiving frame to fall quickly into the dust collection bag.

[0035] The friction sleeve shaft is fixedly connected to the left side of the inner wall of the receiving frame, and the left end of the slide rod abuts against the inner wall of the friction sleeve shaft.

[0036] As a further technical solution, a spring is provided between the right side of the receiving frame and the left side of the contact plate, the circumferential surface of the contact plate is slidably connected to the groove opened on the right side of the inner wall of the denitrification tower, and the connecting plate and the side of the receiving frame near the support plate are fixedly connected.

[0037] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0038] 1. This dry denitrification equipment for cement rotary kilns based on environmental engineering features an ammonia injection box that sprays a reducing agent evenly onto the catalyst layer through nozzles during movement. This allows the reducing agent to fully contact the flue gas, improving denitrification efficiency. Once the reducing agent level is above the storage baffle, it can simultaneously flow into multiple nozzles from the slot at the top of the storage baffle. This prevents some nozzles from failing to spray the reducing agent during the movement of the ammonia injection box, which would result in uneven spraying of the reducing agent and affect the reaction efficiency between the flue gas and the reducing agent.

[0039] 2. This dry denitrification equipment for cement rotary kilns based on environmental protection engineering uses a brush roller to insert the bristles into the mesh of the primary filter screen through friction. The dust stuck in the primary filter screen is scraped off, thus avoiding the primary filter screen from clogging and affecting the efficiency of flue gas flow.

[0040] 3. This dry denitrification equipment for cement rotary kilns 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. This prevents dust from accumulating 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 friction, causing the dust between the bristles to fall into the receiving frame, enabling the brush roller to continuously and effectively scrape the primary filter screen.

[0041] 4. This dry denitrification equipment for cement rotary kilns based on environmental protection engineering can quickly remove dust by taking out the movable card frame and dust collection bag from the receiving frame. It is also highly efficient in installation and disassembly and easy to operate. After aligning the card slot with the arc-shaped positioning block, the movable card frame is lowered so that the arc-shaped positioning block is inserted into the card slot. At this time, the arc-shaped positioning block will lock the movable card frame, improving the stability of installation.

[0042] 5. The cement rotary kiln dry denitration equipment based on environmental protection engineering, the dust adhered to the inner wall of the receiving frame is shaken off through the impact of the inner wall of the receiving frame on the left end of the slide rod and vibration, the slide rod and the abutting plate are ejected and reset to the right, the slide rod drives the oscillating plate to move to the right quickly and knock the receiving frame, the receiving frame is secondarily vibrated, the dust shaking off efficiency is improved, and the dust concentration efficiency and the processing convenience are improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is a whole three-dimensional structure schematic diagram of the present application;

[0044] Figure 2 It is a front side three-dimensional half cut structure schematic diagram of the present application;

[0045] Figure 3 It is a front side three-dimensional half cut structure schematic diagram of the present application;

[0046] Figure 4 It is a front side three-dimensional half cut structure schematic diagram of the present application; Figure 3 It is an enlarged structure schematic diagram of A in the present application;

[0047] Figure 5 It is a front side three-dimensional half cut structure schematic diagram of the present application;

[0048] Figure 6 It is a front side three-dimensional half cut structure schematic diagram of the present application;

[0049] Figure 7 It is an enlarged structure schematic diagram of B in the present application; Figure 6

[0050] Figure 8 It is a front side three-dimensional half cut structure schematic diagram of the present application;

[0051] Figure 9 It is an enlarged structure schematic diagram of C in the present application; Figure 8

[0052] Figure 10 It is a front side three-dimensional structure schematic diagram of the present application.

[0053] ​​In the figure: 1, denitration tower; 2, smoke inlet pipeline; 3, exhaust port; 4, catalyst layer; 5, ammonia injection tank; 6, primary filter screen; 7, dust collection bag; 51, spray head; 52, infusion hose; 53, linear motor; 54, contraction 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 plate; 62, rotating rod; 63, brush roller; 64, abutment plate; 65, roller; 66, receiving frame; 67, friction curved plate; 71, movable clamping frame; 72, connecting plate; 73, arc-shaped positioning block; 74, slide rod; 75, abutment plate; 76, friction sleeve shaft; 77, oscillating plate. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0055] Please refer to Figures 1-10 An embodiment of the present application is: a cement rotary kiln dry denitration equipment based on environmental protection engineering, comprising a denitration tower 1, the denitration tower 1 is used for collecting flue gas; the smoke inlet pipeline 2 is fixedly connected to the rear side of the denitration tower 1, and is used for conveying the flue gas generated in the cement rotary kiln into the denitration tower 1; the exhaust port 3 is fixedly connected to the lower surface of the denitration tower 1; the 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 array from top to bottom, and are used for catalyzing the reducing agent or urea, and promoting the denitration efficiency of the flue gas; the ammonia injection tank 5 is arranged above the catalyst layer 4, and is used for spraying the reducing agent or urea onto the catalyst layer 4; the primary filter screen 6 is arranged above the ammonia injection tank 5, and is used for filtering the dust and alkaline substances in the flue gas, so as to prevent the catalyst layer 4 from being blocked; the dust collection bag 7 is arranged below the primary filter screen 6, and is used for collecting the dust;

[0056] In the embodiment, the high-temperature flue gas rises from the bottom to the top of the smoke inlet pipeline 2 by buoyancy, and then flows into the denitration tower 1 from the top of the smoke inlet pipeline 2. The flue gas in the smoke inlet pipeline 2 continuously extrudes the flue gas in the denitration tower 1, so that the flue gas in the denitration tower 1 flows downward. At this time, the reducing agent is sprayed onto the catalyst layer 4 by the ammonia injection tank 5. The flue gas is efficiently reduced under the action of the catalyst layer 4 and the reducing agent. Finally, the purified gas is discharged from the exhaust port 3. Compared with the traditional denitration method of directly spraying the reducing agent into the rotary kiln, the denitration efficiency of the device is higher, the emission of atmospheric pollutants is reduced, and the environmental protection of the cement rotary kiln is ensured.

[0057] In actual work, the flue gas flows from top to bottom in the denitration tower 1, first contacts the primary filter screen 6, at this time the gas passes through the primary filter screen 6, and the dust in the flue gas is filtered by the primary filter screen 6, avoiding the dust flowing into the catalyst layer 4 with the flue gas, causing the catalyst layer 4 to be blocked, ensuring that the denitration efficiency of the catalyst layer 4 is not affected, then the flue gas continues to pass through the multiple catalyst layers 4 and reacts with the reducing agent, and the reducing agent is gradually absorbed by the catalyst layer 4 in the reaction process, avoiding the excess ammonia from being discharged with the gas, and improving the purification effect.

[0058] Further, the ammonia injection tank 5 includes a spray head 51 threadedly connected to the inner wall at the bottom end of the ammonia injection tank 5, a liquid delivery hose 52 fixedly connected to the front side of the ammonia injection tank 5, and a linear motor 53 fixedly connected to the inner wall of the front side of the denitration tower 1, with the lower surface of the ammonia injection tank 5 fixedly connected to the moving end of the linear motor 53, the linear motor 53 driving the ammonia injection tank 5 to move back and forth left and right, a retracting frame 54 fixedly connected to the front side of the denitration tower 1, the retracting frame 54 being used to accommodate the liquid delivery hose 52 to prevent the liquid delivery hose 52 from being dragged, the inner wall of the retracting frame 54 being rotatably connected to a twisting roller 55 and a limiting roller 56.

[0059] In this embodiment, the spray head 51 is installed at the bottom of the ammonia injection tank 5, the liquid delivery hose 52 is fixedly connected to the front end of the ammonia injection tank 5, the reducing agent is input into the ammonia injection tank 5 through the liquid delivery hose 52, the linear motor 53 drives the ammonia injection tank 5 and the spray head 51 to move back and forth left and right, and the ammonia injection tank 5 sprays the reducing agent uniformly on the catalyst layer 4 through the spray head 51 in the moving process, so that the reducing agent can fully contact the flue gas, and the denitration efficiency is further improved.

[0060] In actual work, the liquid delivery hose 52 is wound in the retracting frame 54 through the twisting roller 55 and the limiting roller 56, the ammonia injection tank 5 drives the liquid delivery hose 52 to stretch when moving to the right, and the twisting roller 55 is gradually tightened, the excess part of the liquid delivery hose 52 falls downward when the ammonia injection tank 5 moves to the left, and the twisting roller 55 is gradually loosened, at this time the elasticity of the torsional spring drives the twisting roller 55 to rotate and reset, and the twisting roller 55 drives the liquid delivery hose 52 to retract into the retracting frame 54 through the friction force, preventing the liquid delivery hose 52 from being dragged in the device.

[0061] Further, the ammonia injection tank 5 further comprises a sliding rail 57 fixedly connected to the inner wall of the denitration tower 1, an inner surface of the sliding rail 57 is slidingly connected to a limiting pulley 58, the ammonia injection tank 5 moves more smoothly on the sliding rail 57 through the limiting pulley 58; a triangular flow guide 59 is fixedly connected to the bottom of the inner wall of the ammonia injection tank 5, an upper surface of the triangular flow guide 59 is fixedly connected to a liquid storage baffle 510, the reducing agent flows to the inclined surface of the triangular flow guide 59 through the infusion hose 52, and flows quickly to the rear end of the ammonia injection tank 5 along the inclined surface, and the liquid surface 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 is fixedly connected to the upper surface of the ammonia injection tank 5, a torsional spring is arranged at the hinged part of the contraction frame 54 and the twisting roller 55, the surface of the infusion hose 52 and the circumferential surface of the twisting roller 55 are in abutment, the surface of the infusion hose 52 and the circumferential surface of the limiting roller 56 are in abutment, 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.

[0062] In the embodiment, the ammonia injection tank 5 slides in the sliding rail 57 through the limiting pulley 58, the limiting pulley 58 converts the sliding friction between the ammonia injection tank 5 and the inner wall of the denitration tower 1 into rolling friction between the limiting pulley 58 and the sliding rail 57, thereby reducing the friction when the ammonia injection tank 5 moves, and preventing the ammonia injection tank 5 from being stuck during the movement.

[0063] 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 59, thereby quickly filling the ammonia injection tank 5, and after the liquid surface of the reducing agent is higher than the liquid storage baffle 510, the reducing agent can flow into multiple spray heads 51 at the same time through the notch at the top of the liquid storage baffle 510, thereby preventing some spray heads 51 from being unable to spray the reducing agent during the movement of the ammonia injection tank 5, causing the reducing agent to be not evenly sprayed, and affecting the reaction efficiency of the flue gas and the reducing agent.

[0064] Working principle: start the linear motor 53, the linear motor 53 drives the ammonia injection tank 5 and the spray head 51 to move back and forth, the reducing agent is input into the ammonia injection tank 5 through the infusion hose 52, the reducing agent in the ammonia injection tank 5 is evenly sprayed onto the catalyst layer 4 through the spray head 51 during the movement of the ammonia injection tank 5, the catalyst layer 4 catalyzes the reducing agent, thereby improving the nitrogen oxide reduction efficiency, the flue gas flows downward from the top of the denitration tower 1, the dust in the flue gas is filtered after contacting the primary filter screen 6, the gas continues to flow downward through the primary filter screen 6 and contacts the catalyst layer 4 with the surface covered by the reducing agent to react, thereby efficiently denitrating.

[0065] Please refer to Figures 1-10On the basis of the above embodiment, in another embodiment of the present application, the primary filter screen 6 includes a partition plate 61 fixedly connected to the inner wall of the denitration tower 1, and the partition plate 61 and the primary filter screen 6 are fixedly connected on the front and back sides; a rotating rod 62 is rotatably connected to the inner surface of the support plate 511, and the circumferential surface of the rotating rod 62 is fixedly connected with a brush roller 63, which is used to sweep the dust adhered in the primary filter screen 6.

[0066] In the present embodiment, the ammonia injection tank 5 reciprocatingly moves the support plate 511, the support plate 511 reciprocatingly moves the rotating rod 62 and the brush roller 63, the brush roller 63 moves and contacts the primary filter screen 6 to generate friction, thereby scraping the primary filter screen 6.

[0067] In actual work, the brush roller 63 inserts the bristles into the mesh of the primary filter screen 6 through friction, and the dust stuck in the primary filter screen 6 is scraped off, thereby avoiding the primary filter screen 6 from being blocked to affect the flow efficiency of the flue gas.

[0068] Further, the primary filter screen 6 further includes an abutting plate 64 fixedly connected to the inner wall of the denitration tower 1, the upper surface of the abutting plate 64 abuts a roller 65, 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 to drive the rotating rod 62 to rotate, a receiving frame 66 is fixedly connected to the two sides of the support plate 511, the receiving frame 66 is used to receive the falling dust, the upper surface of the receiving frame 66 is fixedly connected with a friction curved plate 67, and the right side of the friction curved plate 67 is a rough surface, the dust adhered in the brush roller 63 is scraped off into the receiving frame 66 after the brush roller 63 rubs against the friction curved plate 67, the primary filter screen 6 is fixedly connected to the inner wall of the denitration tower 1 on both sides, the brush roller 63 abuts the lower surface of the primary filter screen 6, and the brush roller 63 abuts the right side surface of the friction curved plate 67.

[0069] In the present embodiment, the rotating rod 62 reciprocatingly moves the roller 65, the roller 65 contacts the rough surface of the abutting plate 64 during the movement to generate friction, the roller 65 is driven to rotate by the friction, the roller 65 drives the rotating rod 62 to rotate, and the rotating rod 62 drives the brush roller 63 to rotate, thereby improving the contact area between the entire circumferential surface of the brush roller 63 and the primary filter screen 6, and preventing the dust from concentrating on one side of the brush roller 63 to affect the scraping efficiency.

[0070] In actual work, the brush roller 63 rotates while reciprocatingly moving, and scrapes off the dust adhered on the primary filter screen 6, the dust falls into the gap between the bristles, the brush roller 63 contacts the rough surface of the friction curved plate 67 while rotating, the bristles vibrate under the influence of the friction, the dust in the gap between the bristles is shaken into the receiving frame 66, the dust is preliminarily cleaned and collected, the brush roller 63 can continuously and effectively scrape the primary filter screen 6, the primary filter screen 6 is further prevented from being blocked, and the falling dust is caught by the receiving frame 66 to prevent the cleaned dust from falling onto the catalyst layer 4.

[0071] 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, the roller 65 is rubbed against the abutting plate 64 and then rotates to drive the rotating rod 62 and the brush roller 63 to rotate, so that the brush roller 63 efficiently sweeps the dust stuck in the mesh holes of the primary filter screen 6 and falls off, preventing the primary filter screen 6 from being blocked, the brush roller 63 is rubbed against the friction curved plate 67 to shake off the dust in the brush hair gap, avoiding the reduction of the scraping effect of the brush roller 63, and the falling dust is caught by the receiving frame 66 to avoid falling on the catalyst layer 4.

[0072] Please refer to Figures 1-10 On the basis of the above embodiment, in another embodiment of the present application, the dust collecting bag 7 comprises a movable clamping frame 71 fixedly connected to the top end of the dust collecting bag 7, the movable clamping frame 71 and the inner wall of the receiving frame 66 abut, the dust collecting bag 7 is placed downward together with the receiving frame 66 into the receiving frame 66, the dust collecting bag 7 can collect the dust falling into the receiving frame 66 and sliding downward, and clamping grooves are formed on the front and back 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 collecting 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 receiving frame 66, the clamping grooves are butt-jointed with the arc-shaped positioning block 73 to fix the movable clamping frame 71.

[0073] In this embodiment, the dust collecting bag 7 and the movable clamping frame 71 are placed into the receiving frame 66 together, the dust falling from the inner wall of the receiving frame 66 slides downward to the dust collecting bag 7, after the work is completed, the movable clamping frame 71 and the dust collecting bag 7 are taken out of the receiving frame 66, the dust can be quickly cleaned, and the installation and disassembly efficiency is high and the operation is convenient.

[0074] In actual work, the movable clamping frame 71 is placed into the receiving frame 66 and is resisted by the connecting plate 72 to be clamped at the bottom end of the receiving frame 66, the clamping grooves are aligned with the arc-shaped positioning block 73, and then the movable clamping frame 71 is placed down, so that the arc-shaped positioning block 73 is inserted into the clamping grooves, at this time, the arc-shaped positioning block 73 clamps the movable clamping frame 71, improving the installation stability.

[0075] Further, the dust collecting bag 7 further comprises a sliding rod 74 which is slidingly connected to the inner surface of the receiving frame 66, the right end of the sliding rod 74 is fixedly connected with a resisting plate 75, the circumferential surface of the sliding rod 74 is fixedly connected with an oscillating plate 77, a groove is formed in the right inner wall of the denitration tower 1, the oscillating plate 77 knocks the receiving frame 66 to make the dust adhered to the inner wall of the receiving frame 66 quickly fall into the dust collecting bag 7; a friction sleeve shaft 76 is fixedly connected to the left inner wall of the receiving frame 66, and the left end of the sliding rod 74 abuts against the inner wall of the friction sleeve shaft 76, a spring is arranged between the right surface of the receiving frame 66 and the left surface of the resisting plate 75, the circumferential surface of the resisting plate 75 is slidingly connected with the groove formed in the right inner wall of the denitration tower 1, and the connecting plate 72 and the receiving frame 66 are fixedly connected on the side close to the supporting plate 511.

[0076] In the embodiment, the supporting plate 511 drives the receiving frame 66 to reciprocate, when the receiving frame 66 drives the sliding rod 74 to move rightward, the sliding rod 74 and the resisting plate 75 are inserted into the groove formed in the right inner wall of the denitration tower 1, when the resisting plate 75 is resisted, the sliding rod 74 stops moving, and at this time, the receiving frame 66 slides rightward on the sliding rod 74, so that the sliding rod 74 is inserted into the friction sleeve shaft 76, and the inner wall of the receiving frame 66 strikes the left end of the sliding rod 74 and vibrates to shake off the dust adhered to the inner wall of the receiving frame 66.

[0077] In actual work, when the receiving frame 66 moves leftward, the sliding rod 74 and the resisting plate 75 are separated from the groove formed in the right inner wall of the denitration tower 1, at this time, the elastic force of the spring is greater than the friction force between the sliding rod 74 and the friction sleeve shaft 76, so as to drive the sliding rod 74 and the resisting plate 75 to rightwardly rebound, the sliding rod 74 drives the oscillating plate 77 to quickly move rightward and knock the receiving frame 66, so that the receiving frame 66 is vibrated again, the efficiency of shaking off the dust is improved, and the efficiency of dust collection and the convenience of processing are promoted.

[0078] Working principle: the clamping groove formed in the movable clamping frame 71 is aligned with the arc-shaped positioning block 73, and then the movable clamping frame 71 is put into the receiving frame 66, the movable clamping frame 71 falls to the bottom of the receiving frame 66, and the arc-shaped positioning block 73 is inserted into the clamping groove, at this time, the dust collecting bag 7 is hung down at the bottom end of the receiving frame 66, and can collect the dust in the receiving frame 66, after the flue gas is purified, the dust is quickly collected and disposed, the receiving frame 66 moves leftward and rightward to drive the sliding rod 74 to move leftward and rightward, so that the sliding rod 74 and the resisting plate 75 knock the inner wall of the receiving frame 66 to make the receiving frame 66 vibrate and shake off the dust adhered to the inner wall, and the dust collection efficiency is improved.

[0079] The application provides a cement rotary kiln dry denitration equipment based on environmental protection engineering, and there are many methods and approaches to realize the technical scheme, and the above description is only the preferred embodiment of the application, and it should be pointed out that, for ordinary skilled in the art, some improvements and refinements can be made without departing from the principle of the application, and these improvements and refinements should also be regarded as the protection scope of the application. The components not explicitly described in the embodiment can be realized by the prior art.

Claims

1. A dry denitrification equipment for cement rotary kilns based on environmental engineering, characterized in that, Used for denitrification of flue gas generated during the operation of cement rotary kilns, including: A denitrification tower (1) is used to collect flue gas; The flue gas inlet pipe (2) 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). Exhaust port (3), which is fixedly connected to the lower surface of the denitrification tower (1); Catalyst layer (4) is fixedly connected to the inner wall of the denitrification tower (1), and multiple catalyst layers (4) are arranged in an array above and below to catalyze the reducing agent and promote the denitrification efficiency of flue gas. An ammonia injection box (5) is disposed above the catalyst layer (4) and is used to spray a reducing agent onto the catalyst layer (4). The ammonia injection box (5) includes: The nozzle (51) is threadedly connected to the inner wall of the bottom end of the ammonia injection box (5); Infusion tubing (52), which 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 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). The linear motor (53) drives the ammonia injection box (5) to move back and forth left and right. A shrink frame (54) is fixedly connected to the front side of the denitrification tower (1). The shrink frame (54) is used to store the infusion tubing (52) and prevent the infusion tubing (52) from being dragged. A torsion roller (55) is rotatably connected to the inner wall of the shrink frame (54). A limit roller (56) is rotatably connected to the inner wall of the shrink frame (54). The ammonia injection box (5) also includes: The slide rail (57) is fixedly connected to the inner wall of the denitrification tower (1), and the inner surface of the slide rail (57) is slidably connected to the limiting pulley (58). A triangular guide block (59) is fixedly connected to the bottom of the inner wall of the ammonia injection box (5). A liquid storage baffle (510) is fixedly connected to the upper surface of the triangular guide block (59). The reducing agent flows to the inclined surface of the triangular guide block (59) through the infusion hose (52) and flows quickly to the rear end of the ammonia injection box (5). The liquid level of the reducing agent continues to rise and flows into the nozzle (51) through the slot at the top of the liquid storage baffle (510). A support plate (511) is fixedly connected to the upper surface of the ammonia injection box (5). A torsion spring is provided at the hinge of the contraction frame (54) and the torsion roller (55). The surface of the infusion hose (52) abuts against the circumferential surface of the torsion 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) passes through the contraction frame (54). The limiting pulley (58) is fixedly connected to the upper surface of the ammonia injection box (5). The primary filter (6) is set above the ammonia injection box (5) to filter dust and alkaline substances in the flue gas and prevent the catalyst layer (4) from being blocked. Dust collection bag (7), which is set below the primary filter (6) for collecting dust in a concentrated manner; The dust collection bag (7) includes: The movable card frame (71) is fixedly connected to the top of the dust collection bag (7). The movable card frame (71) abuts against the inner wall of the receiving frame (66). The dust collection bag (7) is placed downward and together with the receiving frame (66) into the receiving frame (66). The dust collection bag (7) can catch the dust that falls into the receiving frame (66) and slides downward. The movable card frame (71) has card slots on the front and rear sides. A connecting plate (72) is fixedly connected to the side of the support plate (511) near the dust collection bag (7). An arc-shaped positioning block (73) is fixedly connected above the connecting plate (72). After the movable card frame (71) is placed into the receiving frame (66), the card slot mates with the arc-shaped positioning block (73) to fix the movable card frame (71). The dust collection bag (7) also includes: A sliding rod (74) is slidably connected to the inner surface of the receiving frame (66). A contact plate (75) is fixedly connected to the right end of the sliding rod (74). A vibrating plate (77) is fixedly connected to the circumferential surface of the sliding rod (74). A groove is opened on the right side of the inner wall of the denitrification tower (1). The vibrating plate (77) strikes the receiving frame (66) to make the dust adhering to the inner wall of the receiving frame (66) fall quickly into the dust collection bag (7). Friction sleeve shaft (76), the friction sleeve shaft (76) is fixedly connected to the left side of the inner wall of the receiving frame (66), and the left end of the slide rod (74) abuts against the inner wall of the friction sleeve shaft (76); Rotating rod (62), the rotating rod (62) is rotatably connected to the inner surface of the support plate (511), and a brush roller (63) is fixedly connected to the circumferential surface of the rotating rod (62). Material receiving frame (66), which is fixedly connected to both sides of support plate (511); A spring is provided between the right side of the receiving frame (66) and the left side of the contact plate (75), and the circumferential surface of the contact plate (75) is slidably connected to the groove opened on the right side of the inner wall of the denitrification tower (1).

2. The dry denitrification equipment for cement rotary kilns based on environmental engineering as described in claim 1, characterized in that: The primary filter (6) includes: A partition (61) is fixedly connected to the inner wall of the denitrification tower (1), and the partition (61) is fixedly connected to the front and rear sides of the primary filter (6); The brush roller (63) is used to remove dust adhering to the primary filter screen (6).

3. The dry denitrification equipment for cement rotary kilns based on environmental engineering as described in claim 2, characterized in that: The primary filter (6) also includes: A contact plate (64) is fixedly connected to the inner wall of the denitrification tower (1). A roller (65) is abutted on the upper surface of the contact plate (64). The roller (65) is fixedly connected to the circumferential surface of the rotating rod (62). The upper surface of the contact plate (64) is rough. The roller (65) rubs against the rough surface of the contact plate (64) and drives the rotating rod (62) to rotate. The receiving frame (66) is used to catch falling dust. A friction plate (67) is fixedly connected to the upper surface of the receiving frame (66), and the right side of the friction plate (67) is a rough surface. After the brush roller (63) rubs against the friction plate (67), the dust adhering inside is scraped into the receiving frame (66).

4. The dry denitrification equipment for cement rotary kilns based on environmental engineering as described in claim 3, characterized in that, The primary filter (6) is fixedly connected to both sides of the inner wall of the denitrification tower (1), the brush roller (63) abuts against the lower surface of the primary filter (6), and the brush roller (63) abuts against the right side of the friction plate (67).

5. The dry denitrification equipment for cement rotary kilns based on environmental engineering as described in claim 4, characterized in that: The connecting plate (72) and the receiving frame (66) are fixedly connected to the side of the support plate (511).

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