Denitration skid-mounted station for anhydrous ammonia process brick kiln

Abstract

The invention provides a denitration skid-mounted station for an anhydrous ammonia process brick kiln, and relates to the technical field of denitration devices.The denitration skid-mounted station comprises a supporting frame, a feeding assembly, a grinding assembly and a negative pressure injection assembly are installed on the supporting frame, the grinding assembly is arranged below the feeding assembly, the negative pressure injection assembly is arranged below the grinding assembly, and the negative pressure injection assembly is arranged below the grinding assembly. The feeding assembly comprises a hopper arranged at the top of the supporting frame, and a rotating disc capable of rotating is arranged at the bottom of the hopper. A solid reducing agent (such as urea particles) is adopted to replace a liquid reducing agent, and the solid reducing agent is ground into powder, a constant-speed and accurate feeding mechanism and a negative pressure injection technology are combined; compared with the prior art, uniform distribution and efficient reaction of a reducing agent in the tunnel kiln are achieved, the denitration efficiency is improved, the operation risk and cost are greatly reduced, a more reliable and economical solution is provided for NOx emission reduction of the tunnel kiln, and meanwhile higher environmental adaptability and operation stability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of denitration devices, and particularly to a skid-mounted denitration station for brick and tile kilns using the anhydrous ammonia method. Background Art

[0002] Selective non-catalytic reduction (SNCR) technology, as an efficient and low-cost denitration process, has been widely applied. The SNCR process mainly involves spraying a reducing agent (such as urea or ammonia water) into a high-temperature area to undergo a selective reduction reaction with NOx in the flue gas, generating harmless nitrogen and water. However, the traditional SNCR process mainly relies on ammonia water as the reducing agent, but ammonia water has problems such as high storage and transportation costs, strong corrosiveness, and ammonia escape during use. Therefore, the anhydrous ammonia method has gradually become an important development direction in SNCR technology. It generates reducing gases through the pyrolysis of solid urea, which not only overcomes many deficiencies of ammonia water but also has economic and environmental advantages.

[0003] Although the anhydrous ammonia method has significant advantages, currently existing denitration equipment generally has many problems during the agglomeration of urea and the injection process, which limits its application in the SNCR process. On the one hand, urea is prone to agglomeration due to its hygroscopicity during transportation and storage. The agglomerated urea particles cannot be evenly fed and injected, resulting in blockage or uneven injection of the injection system. On the other hand, during the injection process, due to the slow injection speed, low pressure, and insufficient uniformity of the injector, it is difficult for urea particles to fully cover the high-temperature flue gas area, thereby reducing the reduction reaction efficiency and unable to meet the denitration requirements for the long-term stable operation of industrial kilns. Summary of the Invention

[0004] The purpose of the present invention is to provide a skid-mounted denitration station for brick and tile kilns using the anhydrous ammonia method to solve the problems mentioned in the above background art, namely, the agglomerated urea particles cannot be evenly fed and injected, resulting in blockage or uneven injection of the injection system, and during the injection process, due to the slow injection speed, low pressure, and insufficient uniformity of the injector, it is difficult for urea particles to fully cover the high-temperature flue gas area, thereby reducing the reduction reaction efficiency.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A skid-mounted denitration station for brick and tile kilns using the anhydrous ammonia method, including a support frame, on which a feeding component, a grinding component, and a negative-pressure injection component are installed. The grinding component is arranged below the feeding component, and the negative-pressure injection component is arranged below the grinding component; The feeding component includes a hopper arranged at the top of the support frame, and a rotatable rotating disk is arranged at the bottom of the hopper; The grinding component includes two relatively rotating roller bodies arranged below the rotating disk; The negative pressure injection assembly includes a feed pipe disposed below the roll body. The bottom of the feed pipe is installed through the top of the injector. The air inlet of the injector is installed with an injection pipe for introducing high-speed air flow.

[0006] Preferably, the grinding assembly further includes a roller shaft disposed in each roll body. At both ends of each roll body, there are provided tapered roller bearings rotatably connected to the roller shaft. On the outside of each tapered roller bearing, there is provided a first gear fixedly connected to the roller shaft.

[0007] Preferably, there are two brush rollers disposed below the two roll bodies. In each brush roller, there is a roller shaft. At both ends of each brush roller, there are provided bearings rotatably connected to the roller shaft. On the outside of each bearing, there is provided a second gear fixedly connected to the roller shaft.

[0008] Preferably, one of the first gears on each side is meshed and driven with the corresponding second gear through a first chain. The other first gear on each side is meshed and driven through a second chain with a third gear disposed on the output end of a second motor. The second motor is installed on the support frame.

[0009] Preferably, the negative pressure injection assembly further includes a material receiving hopper disposed below the brush roller. The discharge end of the material receiving hopper is communicated with the feed pipe; The injector sequentially includes a negative pressure chamber, a converging chamber, a smooth chamber, a release chamber, and a diversion chamber from left to right. The air inlet of the negative pressure chamber is installed with an injection pipe.

[0010] Preferably, the hopper includes a feed hopper, a converging hopper, and a discharge hopper. The feed hopper is fixedly connected below the converging hopper. The converging hopper is fixedly connected below the discharge hopper. The discharge hopper is provided with a discharge port. An arc-shaped baffle for restricting the movement of materials is installed on the outer wall of the discharge hopper.

[0011] Preferably, the rotating disk, the arc-shaped baffle, and the discharge hopper together form a transfer chamber for making the discharge of the hopper uniform. Below the opening of the transfer chamber, there is provided a material receiving box. At the bottom of the material receiving box, there are two relatively rotating roll bodies; The distance between the bottom of the discharge hopper and the rotating disk is 20 - 40 silk, and the centers of the discharge hopper and the rotating disk do not coincide in the vertical direction.

[0012] Preferably, the feeding assembly further includes a speed reducer disposed at the bottom of the rotating disk. The speed reducer is connected to the output end of the first motor.

[0013] Preferably, an air intake assembly is further provided on the support frame. The air intake assembly includes a plurality of air filters installed at the bottom of the support frame. Above the air filters, at least two volute fans are connected through pipes. A check valve is provided at the output end of each volute fan, and a temperature sensor is provided on each volute fan. The injection pipe is connected to each volute fan through a bifurcated pipe, and an electric control valve and a vortex flowmeter are provided on the bifurcated pipe.

[0014] Preferably, a weight sensor is provided between the bottom of the feed hopper and the support frame, and a hopper cover is installed at the top of the feed hopper.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: First, through the setting of the feeding assembly, the hopper can be divided into three parts. The feed hopper is used to allow materials to enter it. The converging hopper converges the materials and guides them to the discharge port, where they fall on the rotating disk. The rotating disk rotates through the reducer and the first motor at the bottom. Since the centers of the rotating disk and the discharge hopper do not coincide vertically, the materials do not fall at the center of the rotating disk. Therefore, the materials on the rotating disk will move relative to the discharge hopper as the rotating disk rotates, which can avoid the accumulation of materials coming out of the discharge hopper. Some materials move to the transfer cavity through the discharge port, and the materials move in the transfer cavity until they fall into the receiving box from the opening of the transfer cavity. Through the above design, the rotation speed of the rotating disk can be controlled by the first motor and the reducer, so that the discharge speed can be freely controlled, and the materials entering from the hopper can be effectively prevented from caking, making the conveyed materials more uniform.

[0016] Second, through the setting of the grinding assembly, the receiving box can gather the materials on the roller body. Shearing and compressive forces can be applied by the relative rotation of the two roller bodies to grind the materials into the required particle size. The ground materials fall into the receiving hopper, and some materials will adhere to the roller body during grinding. The roller brush can brush them off to make all the materials enter the receiving hopper. The tapered roller bearing is used to support the rotation of the roller body, reduce the friction generated during grinding, and ensure the smooth operation of the roller body. First gears are provided on both sides of any one roller body. One of the first gears is connected to the third gear through the second chain drive. The third gear is rotated by the second motor, which drives the second chain to move, and then drives the first gear to rotate, thereby driving the roller body to rotate for grinding. The first gear on the other side is connected to the second gear through the first chain drive. The first gear on the other side drives the second gear to rotate, and the second gear drives the roller brush to rotate, thereby brushing off the materials, which can not only keep the surface of the roller clean, ensure uniform stress on the materials, but also avoid powder accumulation causing blockage of the roller body.

[0017] III. Through the mutual cooperation of the intake assembly and the negative pressure injection assembly, the injection pipe can direct the high-speed air flow generated by the volute fan to the injector, while rectifying and accelerating the air flow, reducing air flow turbulence, and improving injection uniformity. The injector can convey urea particles and inject them into the reaction area of the kiln. Among them, the negative pressure chamber can generate negative pressure and suction inside through the high-speed air flow ejected from the injection pipe, suck the urea particles from the receiving hopper into the injector and convey them to the converging chamber. The converging chamber can concentrate and compress the air flow, increase the kinetic energy of the air flow carrying particles, improve the injection speed, and enhance the particle decomposition efficiency. The smoothing chamber can rectify the air flow passing through the converging chamber, reduce turbulence, and improve the accuracy of the particle injection direction. The release chamber can increase the pressure of the air flow passing through the smoothing chamber and improve the particle injection force.

[0018] In summary, by using solid reducing agents (such as urea particles) instead of liquid reducing agents, and combining the grinding of solid reducing agents into powder, a uniform and precise feeding mechanism, and negative pressure injection technology, the uniform distribution and efficient reaction of the reducing agent in the tunnel kiln are achieved, which not only improves the denitrification efficiency but also significantly reduces the operation risks and costs. It provides a more reliable and economical solution for NOx reduction in tunnel kilns, and at the same time has higher environmental adaptability and operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the intake assembly of the present invention; Figure 3 is a schematic diagram of the structures of the feeding assembly, grinding assembly and negative pressure injection assembly of the present invention; Figure 4 is a schematic diagram of the structures of the hopper, receiving box and roll body of the present invention; Figure 5 is a schematic diagram of the structure of the feeding assembly of the present invention; Figure 6 is a schematic diagram of the sectional structure of the transfer chamber of the present invention; Figure 7 is a schematic diagram of the structure of the grinding assembly of the present invention; Figure 8 is a schematic diagram of the structure of the negative pressure injection assembly of the present invention; Figure 9 is a schematic diagram of the sectional structure of the negative pressure injection assembly of the present invention; Figure 10 is a schematic diagram of the enlarged structure at A of the present invention; Figure 11 is a schematic diagram of the structure of the electric control panel of the present invention.

[0020] Reference Numerals in the Figures: 1, support frame; 21, air filter; 22, volute fan; 23, check valve; 24, temperature sensor; 25, electric control valve; 26, vortex flowmeter; 31, hopper; 311, feed hopper; 312, converging hopper; 313, discharge hopper; 32, hopper cover; 33, discharge port; 34, arc-shaped baffle; 35, rotating disk; 36, transfer chamber; 37, speed reducer; 38, first motor; 39, material receiving box; 41, roll body; 42, tapered roller bearing; 43, first gear; 44, rotary brush; 45, bearing; 46, second gear; 47, first chain; 48, second chain; 49, third gear; 50, second motor; 51, material receiving hopper; 52, feed pipe; 53, injector; 531, negative pressure chamber; 532, converging chamber; 533, smooth chamber; 534, release chamber; 535, diversion chamber; 54, injection pipe; 6, weight sensor; 7, electric control panel; 8, protective door; 9, display screen; 10, cooling fan; 11, heat insulation board. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-11 As shown in the figure, the present invention provides a technical solution: a denitrification skid-mounted station for an anhydrous ammonia method brick and tile kiln, including a support frame 1, on which a feeding assembly, a grinding assembly, and a negative pressure injection assembly are installed. A grinding assembly is arranged below the feeding assembly, and a negative pressure injection assembly is arranged below the grinding assembly; The feeding assembly includes a hopper 31 arranged on the top of the support frame 1, and a rotatable rotating disk 35 is arranged at the bottom of the hopper 31; The grinding assembly includes two relatively rotating roll bodies 41 arranged below the rotating disk 35; The negative pressure injection assembly includes a feed pipe 52 arranged below the roll body 41, the bottom of the feed pipe 52 is installed through the top of an injector 53, and an injection pipe 54 for introducing high-speed air flow is installed at the air inlet of the injector 53.

[0023] Furthermore, the grinding assembly further includes a roller shaft arranged in each roll body 41, tapered roller bearings 42 rotatably connected to the roller shaft are arranged at both ends of each roll body 41, and first gears 43 fixedly connected to the roller shaft are arranged outside each tapered roller bearing 42.

[0024] Further, two brush rollers 44 are provided below the two roll bodies 41. Each brush roller 44 is provided with a roller shaft therein. Bearings 45 rotatably connected to the roller shaft are provided at both ends of each brush roller 44. Second gears 46 fixedly connected to the roller shaft are provided on the outer sides of each bearing 45.

[0025] Further, one of the first gears 43 on each side is in meshing transmission with the corresponding second gear 46 on the same side through a first chain 47. The other first gear 43 on each side is in meshing transmission connection with a third gear 49 provided on the output end of a second motor 50 through a second chain 48. The second motor 50 is installed on the support frame 1.

[0026] The material receiving box 39 can gather the materials on the roll bodies 41. By applying shear and compression forces through the relative rotation of the two roll bodies 41, the materials are ground into the required particle size. The ground materials fall into the material receiving hopper 51. However, some materials will adhere to the roll bodies 41 during grinding. The brush rollers 44 can brush them off, enabling all the materials to enter the material receiving hopper 51. The tapered roller bearings 42 are used to support the rotation of the roll bodies 41, reduce the friction generated during grinding, and ensure the smooth operation of the roll bodies 41. First gears 43 are provided on both sides of any one roll body 41. One of the first gears 43 on one side is in transmission connection with the third gear 49 through the second chain 48. The second motor 50 drives the third gear 49 to rotate, thereby driving the second chain 48 to move, and then driving the first gear 43 to rotate, thus driving the roll body 41 to rotate for grinding. The first gear 43 on the other side is in transmission connection with the second gear 46 through the first chain 47. The first gear 43 on the other side drives the second gear 46 to rotate, and the second gear 46 drives the brush rollers 44 to rotate, thereby brushing off the materials. This can not only keep the surface of the rolls clean, ensure uniform force on the materials, but also prevent the roll bodies 41 from being blocked due to powder accumulation.

[0027] Further, the negative pressure injection assembly further includes a material receiving hopper 51 provided below the brush rollers 44. The discharge end of the material receiving hopper 51 is communicated with a feed pipe 52. The injector 53 successively includes a negative pressure chamber 531, a converging chamber 532, a smooth chamber 533, a release chamber 534, and a diversion chamber 535 from left to right. An injection pipe 54 is installed at the air inlet of the negative pressure chamber 531.

[0028] The inlet diameter of the converging chamber 532 is larger than the outlet diameter. The inlet diameter of the release chamber 534 is smaller than the outlet diameter. The inlet diameter of the converging chamber 532 is larger than the outlet diameter of the release chamber 534, and the outlet diameter of the converging chamber 532 is equal to the inlet diameter of the release chamber 534.

[0029] The negative pressure chamber 531 is fixedly connected to the inlet of the converging chamber 532. The diversion chamber 535 is fixedly connected to the outlet of the release chamber 534. Both ends of the smooth chamber 533 are fixedly connected to the outlet of the converging chamber 532 and the inlet of the release chamber 534 respectively.

[0030] The length of the converging chamber 532 is less than that of the release chamber 534.

[0031] The injection pipe 54 can direct the high-speed air flow generated by the volute fan 22 to the injector 53, while rectifying and accelerating the air flow, reducing air flow disorder, and improving injection uniformity. The injector 53 can convey urea particles and inject them into the reaction area of the kiln. Among them, the negative pressure chamber 531 can form a negative pressure inside through the high-speed air flow ejected by the injection pipe 54 to generate suction, suck the urea particles from the receiving hopper 51 into the injector 53 and convey them to the converging chamber 532. The converging chamber 532 can concentrate and compress the air flow, increase the kinetic energy of the air flow carrying particles, improve the injection speed, enhance the particle decomposition efficiency. The smoothing chamber 533 can rectify the air flow passing through the converging chamber 532, reduce turbulence, and improve the accuracy of the particle injection direction. The release chamber 534 can increase the pressure of the air flow passing through the smoothing chamber 533 and improve the injection force of the particles.

[0032] Further, the hopper 31 includes a feeding hopper 311, a converging hopper 312, and a discharging hopper 313. The converging hopper 312 is fixedly connected below the feeding hopper 311, and the discharging hopper 313 is fixedly connected below the converging hopper 312. A discharging port 33 is provided on the discharging hopper 313, and an arc-shaped baffle 34 for restricting the movement of materials is installed on the outer wall of the discharging hopper 313.

[0033] Further, the rotating disk 35, the arc-shaped baffle 34, and the discharging hopper 313 together form a transfer chamber 36 for making the discharging of the hopper 31 uniform. A receiving box 39 is provided below the opening of the transfer chamber 36, and two relatively rotating roller bodies 41 are provided at the bottom of the receiving box 39; The distance between the bottom of the discharging hopper 313 and the rotating disk 35 is 20 - 40 silk, and the centers of the discharging hopper 313 and the rotating disk 35 do not coincide in the vertical direction.

[0034] Further, the feeding assembly further includes a speed reducer 37 provided at the bottom of the rotating disk 35, and the speed reducer 37 is connected to the output end of the first motor 38.

[0035] The hopper 31 can be divided into three parts. The feeding hopper 311 is used to let materials enter it. The converging hopper 312 converges the materials and guides them to the discharging hopper 313, where they fall onto the rotating disk 35. The rotating disk 35 rotates through the speed reducer 37 and the first motor 38 at the bottom. Since the centers of the rotating disk 35 and the discharging hopper 313 do not coincide vertically, the materials do not fall at the center of the rotating disk 35. Therefore, the materials on the rotating disk 35 will move relative to the discharging hopper 313 as the rotating disk 35 rotates, which can prevent the materials coming out of the discharging hopper 313 from piling up. Part of the materials move into the transfer chamber 36 through the discharging port 33. The materials move in the transfer chamber 36 until they fall into the receiving box 39 from the opening of the transfer chamber 36. Through the above design, the rotation speed of the rotating disk 35 can be controlled by the first motor 38 and the speed reducer 37, so that the discharging speed can be freely controlled, and the materials entering from the hopper 31 can be effectively prevented from caking, making the conveyed materials more uniform.

[0036] Further, an air intake assembly is also provided on the support frame 1. The air intake assembly includes a number of air filters 21 installed at the bottom of the support frame 1. Above the air filters 21, at least two volute fans 22 are connected through pipes. A check valve 23 is provided at the output end of each volute fan 22, and a temperature sensor 24 is provided on each volute fan 22. The injection pipe 54 is connected to each volute fan 22 through a bifurcated pipe. An electric control valve 25 and a vortex flowmeter 26 are provided on the bifurcated pipe. The electric control valve 25 can adjust the air intake amount as needed to control the operating parameters of the equipment, and the vortex flowmeter 26 can accurately measure the air intake amount to provide data support for adjusting the system operation.

[0037] The moisture in the external air can be filtered by the air filters 21, so that dry air enters the volute fans 22, preventing moisture from contacting with the urea particles to form caking. The volute fans 22 can provide high-speed air flow to provide power for the entire negative pressure injection assembly, ensuring that the device conveys the urea particles to the negative pressure injection assembly evenly. The check valve 23 can prevent the air flow from flowing back to protect the pipes and equipment. The temperature sensor 24 can monitor the temperature of the volute fan 22. When the temperature of the running volute fan 22 reaches the set value, another idle volute fan 22 is switched to prevent the equipment from failing due to high temperature.

[0038] Further, a weight sensor 6 is provided between the bottom of the feeding hopper 311 and the support frame 1. A hopper cover 32 is installed at the top of the feeding hopper 311. The weight sensor 6 can monitor the weight of the materials entering the entire equipment in real time to ensure accurate metering and operation safety. The hopper cover 32 can seal the hopper 31 when not in use to prevent the materials from overflowing or being contaminated by the outside.

[0039] An electric control panel 7 is also provided on the support frame 1, and a number of protective doors 8 are installed on the support frame 1. A display screen 9 is embedded on the surface of the protective door 8 corresponding to the electric control panel 7, and a cooling fan 10 is installed on the protective door 8 corresponding to the air intake assembly. A heat insulation plate 11 is provided between the air intake assembly and the grinding assembly. The electric control panel 7 is used to control the operation, parameter adjustment and operation monitoring of the entire system. The protective door 8 is used to protect the internal equipment from external environmental interference and ensure operation safety at the same time. The display screen 9 is used to display the equipment operation status, parameters and fault information in real time. The cooling fan 10 is used to help the equipment dissipate heat and prevent overheating from affecting the operation. The heat insulation plate 11 can prevent the high temperature of the volute fan 22 from affecting the coal powder preparation effect.

[0040] Working principle: First, move a denitration skid-mounted station for anhydrous ammonia method brick and tile kilns to the working position. When in use, in the first step, start the air filter 21 and the volute fan 22 in sequence, and open the electric control valve 25 to make the drying air flow out from the ejector 53. In the second step, start the first motor 38 to drive the rotating disk 35 to start rotating, and then start the second motor 50 to drive the roller body 41 to rotate. In the third step, open the hopper cover 32 and put urea into the hopper 31. The urea passes through the feed hopper 311 and the converging hopper 312 in sequence and falls onto the rotating disk 35 in the discharge hopper 313. As the rotating disk 35 rotates, part of the urea enters the transfer chamber 36 from the discharge port 33 on the discharge hopper 313, and after being converged by the arc-shaped baffle 34, it falls into the receiving box 39. In the fourth step, the urea falls from the receiving box 39 onto the roller body 41. The second motor 50 drives the third gear 49 to rotate, the third gear 49 continues to drive the second chain 48 to move, the second chain 48 drives the first gear 43 to rotate, the first gear 43 drives the roller to rotate, and the roller drives the roller body 41 to rotate, so as to grind the urea into powder. In the fifth step, the urea powder sticking to the roller body 41 of the urea powder drives the first chain 47 to move through the first gear 43 at the other end of the roller body 41. The first chain 47 drives the second gear 46 to rotate, the second gear 46 drives the roller to rotate, and the roller drives the brush 44 to rotate, sweeping the urea powder on the roller body 41 into the receiving hopper 51. In the sixth step, when the high-speed air flow passes through the ejector 53, the negative pressure formed in the negative pressure chamber 531 sucks the urea powder in the receiving hopper 51 from the feed pipe 52 and sprays it out from the diversion chamber 535. In this way, the use process of a denitration skid-mounted station for anhydrous ammonia method brick and tile kilns is completed.

[0041] This equipment uses urea particles widely supplied in the market as a reducing agent. Under stable operating conditions, the equipment shows excellent denitration efficiency, which can reduce the original emission concentration from 90mg / Nm³ to below 50mg / Nm³, and even reach an ultra-low emission level of 45mg / Nm³ under certain working conditions. The equipment realizes 100% synchronous operation with the tunnel kiln, ensuring the stability of the kiln furnace and the output are not affected, and at the same time not damaging the cooling, calcining and drying atmospheres in the kiln.

[0042] Taking a 3.6-meter cross-section integrated drying and firing tunnel kiln as an example, with a daily output of 210,000 - 220,000 standard bricks, a flue gas volume of 100,000 Nm³ / h, and the calorific value remaining at the existing level, when the equipment operates for 24 hours, using urea particles with a 46% ammonia nitrogen content as the reducing agent, the hourly consumption is 7 kg, the unit price of urea is 2.5 yuan / kg, and the daily urea cost is approximately 420 yuan. At the same time, the total installed power is 12.95 kW, the actual operating power is 5 kW, and calculated at an electricity price of 0.75 yuan / kWh, the daily operating electricity cost is 90 yuan. The equipment has low operating costs and can ensure stable data and the smooth operation of the kiln for a long time.

[0043] This equipment can ensure the continuity and stability of the kiln production during the denitrification process, without phenomena such as production reduction and kiln collapse, and meets or even exceeds the compliance requirements of Class A enterprises under the existing emission standards.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A denitrification skid-mounted station for anhydrous ammonia brick kiln, characterized in that: It comprises a support frame (1), on which a feeding assembly, a grinding assembly and a negative pressure injection assembly are mounted, a grinding assembly is arranged below the feeding assembly, and a negative pressure injection assembly is arranged below the grinding assembly; The feeding assembly comprises a hopper (31) arranged on the top of the support frame (1), and a rotatable rotating disk (35) is arranged at the bottom of the hopper (31); The grinding assembly comprises two roller bodies (41) arranged below the rotating disk (35) and rotating relative to each other; The negative pressure injection assembly comprises a feed pipe (52) arranged below the roller body (41), the bottom of the feed pipe (52) being installed through the top of the injector (53), and the air inlet of the injector (53) is equipped with an injection pipe (54) for introducing a high-speed airflow.

2. The denitration skid-mounted station for brick and tile kilns using anhydrous ammonia method according to claim 1, characterized in that: The grinding assembly further comprises a roller disposed in each roller body (41), tapered roller bearings (42) rotatably connected to the roller are disposed at both ends of each roller body (41), and a first gear (43) fixedly connected to the roller is disposed on the outer side of each tapered roller bearing (42).

3. The denitration skid-mounted station for brick kilns using anhydrous ammonia method according to claim 2, characterized in that: Two roller brushes (44) are arranged below the two roller bodies (41), each roller brush (44) is provided with a roller shaft, both ends of each roller brush (44) are provided with bearings (45) rotatably connected to the roller shaft, and the outer side of each bearing (45) is provided with a second gear (46) fixedly connected to the roller shaft.

4. The denitration skid-mounted station for brick and tile kilns using anhydrous ammonia method according to claim 3, characterized in that: One of the first gears (43) on each side is meshed with the second gear (46) on the corresponding side via a first chain (47), and the other first gear (43) on each side is meshed with a third gear (49) arranged on the output end of a second motor (50) via a second chain (48), and the second motor (50) is mounted on the support frame (1).

5. The denitration skid-mounted station for brick kilns using anhydrous ammonia method according to claim 4, characterized in that: The negative pressure spraying assembly further comprises a material receiving hopper (51) arranged below the roller brush (44), wherein the material discharge end of the material receiving hopper (51) is connected to the material feed pipe (52); The ejector (53) comprises, from left to right, a negative pressure chamber (531), a contraction chamber (532), a smoothing chamber (533), a release chamber (534), and a flow guiding chamber (535), and an ejection pipe (54) is installed at the air inlet of the negative pressure chamber (531).

6. The denitration skid-mounted station for brick and tile kilns using anhydrous ammonia method according to claim 1, characterized in that: The hopper (31) comprises a feed hopper (311), a gathering hopper (312) and a discharge hopper (313); the feed hopper (311) is fixedly connected to the bottom of the gathering hopper (312); the discharge hopper (313) is fixedly connected to the bottom of the gathering hopper (312); a discharge port (33) is provided on the discharge hopper (313); and an arc-shaped baffle (34) for limiting the movement of materials is installed on the outer wall of the discharge hopper (313).

7. The denitration skid-mounted station for brick kilns using anhydrous ammonia method according to claim 6, characterized in that: The rotating disk (35), the arc-shaped baffle (34) and the discharge hopper (313) together form a transfer chamber (36) that enables the hopper (31) to discharge materials evenly. A material receiving box (39) is provided below the opening of the transfer chamber (36). Two roller bodies (41) that rotate relative to each other are provided at the bottom of the material receiving box (39); The distance between the bottom of the discharge hopper (313) and the rotating disk (35) is 20-40 mm, and the center of the discharge hopper (313) and the center of the rotating disk (35) do not overlap in the vertical direction.

8. The denitration skid-mounted station for brick and tile kilns using anhydrous ammonia method according to claim 7, characterized in that: The feeding assembly further comprises a reducer (37) arranged at the bottom of the rotating disk (35), wherein the reducer (37) is connected to an output end of the first motor (38).

9. The denitration skid-mounted station for brick and tile kilns using anhydrous ammonia method according to claim 5, characterized in that: The support frame (1) is also provided with an air intake assembly, the air intake assembly comprising a plurality of air filters (21) mounted on the bottom of the support frame (1), at least two volute fans (22) are connected above the air filters (21) via pipelines, a check valve (23) is provided at the output end of each volute fan (22), and a temperature sensor (24) is provided on each volute fan (22); The injection pipe (54) is connected to each volute fan (22) via a bifurcated pipeline, and an electric regulating valve (25) and a vortex flowmeter (26) are provided on the bifurcated pipeline.

10. The denitration skid-mounted station for brick and tile kilns using anhydrous ammonia method according to claim 7, characterized in that: A weight sensor (6) is provided between the bottom of the feed hopper (311) and the support frame (1), and a hopper cover (32) is installed on the top of the feed hopper (311).

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