Cement kiln dust and nitrate integrated purification device

Abstract

The utility model relates to the technical field of cement production especially is concerned on a cement kiln dust and nitre integration purification device, it not only can utilize to high temperature in flue gas, has saved the trouble of heating in catalytic process, has reduced energy loss, and can automatically clean the dust filtered out, has saved the trouble of staff cleaning, has improved dust removal efficiency, including purification mechanism, still including catalytic mechanism, heat exchange mechanism, vibration mechanism, transmission mechanism and spraying mechanism, catalytic mechanism installs on the purification mechanism and carries out catalytic filtration to flue gas, heat exchange mechanism installs on the purification mechanism and carries out dust removal to flue gas, vibration mechanism installs on the purification mechanism and carries out knocking and cleaning to vibration mechanism, transmission mechanism installs on the vibration mechanism and drives spraying mechanism rotation, spraying mechanism installs on transmission mechanism and sprays ammonia water to the purification mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of cement production, and in particular to an integrated dust and nitrate purification device for cement kilns. Background Technology

[0002] The cement industry is a highly polluting and energy-intensive industry. Its emissions of particulate matter and nitrogen oxides account for a large proportion of industrial pollution emissions, making it a key industry for pollution control.

[0003] Existing integrated dust and nitrogen purification devices for cement kilns, such as the dry desulfurization and denitrification device for cement kiln flue gas with application number 202321921369.7, mainly include a material tank and a treatment box. A screw conveyor is installed at the bottom of the material tank, and a conveying pipe is connected to the outlet of the screw conveyor. An exhaust fan is installed at the inlet end of the conveying pipe. The interior of the treatment box is divided into a dust removal chamber, a treatment chamber, and a purification chamber. A spiral powder spraying pipe and a spiral jet spraying pipe are installed in the treatment chamber. In use, the flue gas discharged from the cement kiln enters the dust removal chamber through the inlet pipe for dust removal treatment to remove dust from the flue gas. Then, it is sprayed out through the spiral jet spraying pipe. The absorbent and flue gas are sprayed out relative to each other, and they come into contact and collide in opposite directions to carry out the first reaction, which is the first desulfurization and denitrification. Subsequently, the flue gas continues to rise through the gap between the inclined plate and the side wall of the treatment box.

[0004] However, most existing purification devices require dust removal before denitrification. After dust removal, the flue gas temperature drops, and secondary heating may be required to meet the denitrification catalytic temperature. Moreover, dust in the flue gas easily adheres to the inner wall of the equipment and needs to be cleaned frequently, otherwise it will easily affect the dust removal efficiency. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an integrated dust and nitrogen purification device for cement kilns that not only utilizes the high temperature in flue gas, eliminating the trouble of heating during the catalytic process and reducing energy loss, but also automatically cleans the filtered dust, saving the trouble of cleaning by staff and improving dust removal efficiency.

[0006] This utility model discloses an integrated dust and nitrogen removal device for cement kilns, comprising a purification mechanism; it also includes a catalytic mechanism, a heat exchange mechanism, a vibration mechanism, a transmission mechanism, and a spraying mechanism. The catalytic mechanism is installed on the purification mechanism and performs catalytic filtration of the flue gas; the heat exchange mechanism is installed on the purification mechanism and removes dust from the flue gas; the vibration mechanism is installed on the purification mechanism and performs knocking and dust removal; the transmission mechanism is installed on the vibration mechanism and drives the spraying mechanism to rotate; the spraying mechanism is installed on the transmission mechanism and sprays ammonia water into the purification mechanism. The dust generated in the cement kiln enters the heat exchange mechanism to slow down and reduce dust. After dust removal, the flue gas enters the purification mechanism, where the spraying mechanism sprays ammonia water into the purification mechanism. This, combined with the catalytic action of the catalytic mechanism, denitrifies the flue gas. Simultaneously, the vibration mechanism is activated to knock on the heat exchange mechanism, causing dust to slide down and be collected. The vibration mechanism, through the transmission mechanism, drives the spraying mechanism to rotate, increasing the spraying area and enhancing the denitrification effect.

[0007] Preferably, the purification mechanism includes a purification tower, a waste collection hopper, a drain pipe, a drain valve, and a level gauge. The bottom of the purification tower is connected to the ground, and the interior of the purification tower has a cavity. The waste collection hopper is installed at the bottom of the cavity of the purification tower, the top of the drain pipe is connected to the bottom of the waste collection hopper, the drain valve is installed on the drain pipe, and the level gauge is installed inside the cavity of the purification tower. The level gauge detects the level of waste liquid in the cavity of the purification tower. When the level is high, it reminds the staff to open the drain valve so that the waste liquid can be discharged through the waste collection hopper and the drain pipe.

[0008] Preferably, the catalytic mechanism includes a guide plate, a catalytic filter layer, multiple sets of hydrophobic plates, and a chimney. The guide plate is installed inside the cavity of the purification tower, the catalytic filter layer is installed inside the cavity of the purification tower, the multiple sets of hydrophobic plates are all installed at the top inside the cavity of the purification tower, and the chimney is installed on the purification tower and communicates with the cavity of the purification tower. The guide plate guides the input flue gas, causing the flue gas to flow upward. The catalytic filter layer catalyzes the flue gas, accelerating the reaction between the flue gas and ammonia water, promoting the denitrification of the flue gas. After denitrification, the flue gas passes through the multiple sets of hydrophobic plates to block the moisture in the flue gas, and then the flue gas is discharged through the chimney.

[0009] Preferably, the heat exchange mechanism includes an inlet pipe, a spiral baffle, a heat-conducting plate, a hinge, a cleaning cover, a filter box, and a check valve. The inlet pipe is installed on the purification tower, the spiral baffle is spirally installed on the inner wall of the purification tower, the heat-conducting plate is installed in the cavity of the purification tower, the hinge is installed on the inlet pipe, the cleaning cover is installed on the hinge, the filter box is installed between the inlet pipe and the purification tower, and the check valve is installed on the heat-conducting plate. The inlet pipe is connected to the cement kiln exhaust pipe, and the flue gas enters the interlayer between the heat-conducting plate and the purification tower. Finally, it enters the cavity after being filtered by the filter box. The vibration mechanism strikes the heat-conducting plate to vibrate, which facilitates the downward transport of naturally settled dust along the spiral baffle. At the same time, the vibration mechanism strikes the filter box to vibrate, causing the dust attached to the filter box to fall off. After long-term use, the operator opens the cleaning cover to clean out the dust collected at the lowest end of the spiral baffle. The check valve prevents the flue gas from flowing back.

[0010] Preferably, the vibration mechanism includes a motor, a reducer, two sets of first rotating shafts, two sets of vibrating blocks, two sets of first pulleys, and a first belt. The motor is mounted on the purification tower, and the output end of the motor is connected to the input end of the reducer. The output end of the reducer is connected to the input end of the first set of first rotating shafts. The second set of first rotating shafts is rotatably mounted in the space between the purification tower and the heat-conducting plate. The two sets of vibrating blocks are respectively mounted on the two sets of first rotating shafts, and the two sets of first pulleys are respectively mounted on the two sets of vibrating blocks. The first belt is tensioned between the two sets of first pulleys. When the motor is started, the motor drives the first set of first rotating shafts to rotate through the reducer. The first rotating shafts drive the vibrating blocks and first pulleys connected to them to rotate. The first set of vibrating blocks strikes the filter box. The two sets of first pulleys drive the second set of first rotating shafts to rotate through the first belt transmission. The second set of first rotating shafts drives the vibrating blocks to rotate and strike the heat-conducting plate.

[0011] Preferably, the transmission mechanism includes a crossbeam, a right-angle steering gear, a transmission shaft, two sets of second pulleys, and a second belt. The crossbeam is mounted on a heat-conducting plate, the right-angle steering gear is mounted on the crossbeam, the transmission shaft is rotatably mounted on the heat-conducting plate and connected to the input end of the right-angle steering gear, the two sets of second pulleys are respectively mounted on the transmission shaft and the first set of first rotating shafts, and the second belt is tensioned between the two sets of second pulleys. The first set of first rotating shafts drives the second pulleys connected to them to rotate, and the two sets of second pulleys are driven by the second belt, thereby driving the transmission shaft to rotate. The transmission shaft drives the spraying mechanism to rotate through the second pulleys.

[0012] Preferably, the spraying mechanism includes a sleeve, a water supply pipe, a spray plate, and multiple sets of spray heads. The sleeve is mounted on a crossbeam, the water supply pipe is mounted on the sleeve, the power input end of the spray plate is connected to the power output end of a right-angle deflector, the spray plate is internally connected to the water supply pipe, and multiple sets of spray heads are mounted on the spray plate. The water supply pipe delivers ammonia water to the spray plate through the sleeve, the right-angle deflector drives the spray plate to rotate, and the ammonia water is sprayed into the cavity of the purification tower through multiple sets of spray heads. The rotation of the spray plate causes the ammonia water to be thrown out, increasing the spraying area.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the dust generated by the cement kiln enters the heat exchange mechanism to slow down and reduce dust. After dust removal, the flue gas enters the purification mechanism. The spraying mechanism sprays ammonia water into the purification mechanism, which, together with the catalytic mechanism, denitrifies the flue gas. At the same time, the vibration mechanism is activated to knock on the heat exchange mechanism, causing the dust to slide down and be collected. The vibration mechanism drives the spraying mechanism to rotate through the transmission mechanism, increasing the spraying area and enhancing the denitrification effect. Attached Figure Description

[0014] Figure 1 This is a front view cross-sectional structural diagram of the present invention;

[0015] Figure 2 This is a cross-sectional isometric structural diagram of the purification mechanism and catalytic mechanism of this utility model;

[0016] Figure 3 This is a cross-sectional isometric structural diagram of the heat exchange mechanism and transmission mechanism of this utility model;

[0017] Figure 4 This is a partially enlarged cross-sectional isometric structural diagram of the heat exchange mechanism, vibration mechanism, and spraying mechanism of this utility model.

[0018] The attached diagram is labeled as follows: 01, purification mechanism; 11, purification tower; 12, waste collection hopper; 13, drain pipe; 14, drain valve; 15, level gauge; 02, catalytic mechanism; 21, guide plate; 22, catalytic filter layer; 23, hydrophobic plate; 24, chimney; 03, heat exchange mechanism; 31, air inlet pipe; 32, rotating baffle; 33, heat conduction plate; 34, hinge; 35, cleaning cover; 36, filter box; 37, check valve; 04, vibration mechanism; 41, electric motor; 42, reducer; 43, first rotating shaft; 44, vibrating block; 45, first pulley; 46, first belt; 05, transmission mechanism; 51, crossbeam; 52, right-angle steering gear; 53, transmission shaft; 54, second pulley; 55, second belt; 06, spray mechanism; 61, sleeve; 62, water supply pipe; 63, spray plate; 64, spray head. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0020] Example 1

[0021] This utility model discloses an integrated dust and nitrogen purification device for cement kilns, comprising a purification mechanism 01; it also includes a catalytic mechanism 02, a heat exchange mechanism 03, a vibration mechanism 04, a transmission mechanism 05, and a spraying mechanism 06. The catalytic mechanism 02 is installed on the purification mechanism 01 and performs catalytic filtration of the flue gas; the heat exchange mechanism 03 is installed on the purification mechanism 01 and removes dust from the flue gas; the vibration mechanism 04 is installed on the purification mechanism 01 and performs knocking cleaning; the transmission mechanism 05 is installed on the vibration mechanism 04 and drives the spraying mechanism 06 to rotate; the spraying mechanism 06 is installed on the transmission mechanism 05 and sprays ammonia water into the purification mechanism 01. The purification tower 11 includes a purification tower 11, a waste collection hopper 12, a drain pipe 13, a drain valve 14, and a level gauge 15. The bottom of the purification tower 11 is connected to the ground, and a cavity is provided inside the purification tower 11. The waste collection hopper 12 is installed at the bottom of the cavity of the purification tower 11, and the top of the drain pipe 13 is connected to the bottom of the waste collection hopper 12. The drain valve 14 is installed on the drain pipe 13, and the level gauge 15 is installed inside the cavity of the purification tower 11. The catalytic mechanism 02 includes a guide plate 21, a catalytic filter layer 22, multiple sets of hydrophobic plates 23, and a chimney 24. The guide plate 21 and the catalytic filter layer 22 are installed inside the cavity of the purification tower 11, and the multiple sets of hydrophobic plates 23 are installed inside the cavity of the purification tower 11. All components 23 are installed at the top of the cavity inside the purification tower 11. The chimney 24 is installed on the purification tower 11 and communicates with the cavity inside the purification tower 11. The heat exchange mechanism 03 includes an inlet pipe 31, a spiral baffle 32, a heat-conducting plate 33, a hinge 34, a cleaning cover 35, a filter box 36, and a check valve 37. The inlet pipe 31 is installed on the purification tower 11, the spiral baffle 32 is spirally installed on the inner wall of the purification tower 11, the heat-conducting plate 33 is installed inside the cavity of the purification tower 11, the hinge 34 is installed on the inlet pipe 31, the cleaning cover 35 is installed on the hinge 34, the filter box 36 is installed between the inlet pipe 31 and the purification tower 11, and the check valve 37 is installed on the heat-conducting plate 33. The vibration mechanism 04 includes a motor 41, a reducer 42, two sets of first rotating shafts 43, two sets of vibrating blocks 44, two sets of first pulleys 45, and a first belt 46. The motor 41 is installed on the purification tower 11. The output end of the motor 41 is connected to the input end of the reducer 42. The output end of the reducer 42 is connected to the input end of the first set of first rotating shafts 43. The second set of first rotating shafts 43 is rotatably installed in the interlayer between the purification tower 11 and the heat-conducting plate 33. The two sets of vibrating blocks 44 are respectively installed on the two sets of first rotating shafts 43. The two sets of first pulleys 45 are respectively installed on the two sets of vibrating blocks 44. The first belt 46 is tensioned between the two sets of first pulleys 45.During operation, the air inlet pipe 31 is first connected to the cement kiln exhaust pipe, allowing the flue gas to enter the space between the heat-conducting plate 33 and the purification tower 11. After being filtered by the filter box 36, the flue gas enters the cavity. The motor 41 is then started, driving the first set of first rotating shafts 43 to rotate via the reducer 42. These shafts, in turn, drive the connected vibrating blocks 44 and first pulleys 45 to rotate. The first set of vibrating blocks 44 strikes the filter box 36. The two sets of first pulleys 45, via the first belt 46, further drive the second set of first rotating shafts 43 to rotate. These shafts, in turn, drive the vibrating blocks 44 to rotate, striking the heat-conducting plate 33, thus facilitating the movement of naturally settled dust along the filter box. The swirling baffle 32 conveys the flue gas downwards. After prolonged use, staff open the cleaning cover 35 to remove the dust collected at the lowest end of the swirling baffle 32. A check valve 37 prevents backflow of flue gas. The guide plate 21 guides the incoming flue gas, causing it to flow upwards. The catalytic filter layer 22 catalyzes the flue gas, accelerating the reaction between the flue gas and ammonia water, promoting denitrification. After denitrification, the flue gas passes through multiple sets of hydrophobic plates 23 to remove moisture before being discharged through the chimney 24. The level gauge 15 detects the waste liquid level in the cavity of the purification tower 11. When the level is high, it alerts staff to open the drain valve 14, allowing the waste liquid to be discharged through the waste collection hopper 12 and the drain pipe 13.

[0022] Example 2

[0023] like Figures 1 to 4As shown, this utility model discloses an integrated dust and nitrogen purification device for cement kilns, based on Embodiment 1. The transmission mechanism 05 includes a crossbeam 51, a right-angle deflector 52, a transmission shaft 53, two sets of second pulleys 54, and a second belt 55. The crossbeam 51 is mounted on a heat-conducting plate 33, the right-angle deflector 52 is mounted on the crossbeam 51, the transmission shaft 53 is rotatably mounted on the heat-conducting plate 33 and connected to the input end of the right-angle deflector 52, the two sets of second pulleys 54 are respectively mounted on the transmission shaft 53 and the first set of first rotating shafts 43, and the second belt 55 is tensioned between the two sets of second pulleys 54. The spraying mechanism 06 includes a sleeve 61, a water supply pipe 62, a spray disc 63, and multiple sets of spray heads 64. The sleeve 61 is mounted on... Mounted on the crossbeam 51, the water supply pipe 62 is installed on the sleeve 61, the power input end of the spray plate 63 is connected to the power output end of the right-angle steering gear 52, the spray plate 63 is internally connected to the water supply pipe 62, and multiple sets of spray heads 64 are installed on the spray plate 63; when it is working, firstly, the air inlet pipe 31 is connected to the cement kiln exhaust pipe, the flue gas enters the interlayer between the heat conduction plate 33 and the purification tower 11, and finally enters the cavity after being filtered by the filter box 36. The motor 41 is started, and the motor 41 drives the first set of first rotating shafts 43 to rotate through the reducer 42. The first rotating shafts 43 drive the connected vibrating blocks 44 and the first pulley 45 to rotate. The first set of vibrating blocks 44 strikes the filter box 36, and the two The first pulley 45 of the first group drives the first shaft 43 of the second group to rotate via the first belt 46. The first shaft 43 of the second group drives the vibrating block 44 to rotate and strike the heat-conducting plate 33, which facilitates the downward transport of naturally settled dust along the spiral baffle 32. After long-term use, the staff opens the cleaning cover 35 to clean out the dust collected at the lowest end of the spiral baffle 32. A check valve 37 is set to prevent flue gas backflow. The guide plate 21 guides the input flue gas, causing it to flow upward. The water pipe 62 transports ammonia water through the sleeve 61 to the spray plate 63. The right-angle deflector 52 drives the spray plate 63 to rotate, and the ammonia water is sprayed into the cavity of the purification tower 11 through multiple spray heads 64. The first rotating shaft 43 drives the connected second pulley 54 to rotate. The two sets of second pulleys 54 are driven by the second belt 55, which in turn drives the drive shaft 53 to rotate. The drive shaft 53 drives the spray plate 63 to rotate through the second pulleys 54. The rotation of the spray plate 63 causes ammonia water to be thrown out, increasing the spray area. The catalytic filter layer 22 catalyzes the flue gas, accelerates the reaction between the flue gas and ammonia water, and promotes the denitrification of the flue gas. After denitrification, the flue gas passes through multiple sets of hydrophobic plates 23 to block the moisture in the flue gas, and then the flue gas is discharged through the chimney 24. The level gauge 15 detects the liquid level of the waste liquid in the cavity of the purification tower 11. When the liquid level is high, it reminds the staff to open the drain valve 14 so that the waste liquid can be discharged through the waste collection hopper 12 and the drain pipe 13.

[0024] The electric motor 41 and the reducer 42 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cement kiln dust and nitration integrated purification device, comprising a purification mechanism (01); characterized in that, It also includes a catalytic mechanism (02), a heat exchange mechanism (03), a vibration mechanism (04), a transmission mechanism (05), and a spraying mechanism (06). The catalytic mechanism (02) is installed on the purification mechanism (01) and performs catalytic filtration on the flue gas. The heat exchange mechanism (03) is installed on the purification mechanism (01) and removes dust from the flue gas. The vibration mechanism (04) is installed on the purification mechanism (01) and performs knocking and dust removal on the vibration mechanism (04). The transmission mechanism (05) is installed on the vibration mechanism (04) and drives the spraying mechanism (06) to rotate. The spraying mechanism (06) is installed on the transmission mechanism (05) and sprays ammonia water into the purification mechanism (01).

2. The integrated dust and nitrification purification device for cement kilns as described in claim 1, characterized in that, The purification unit (01) includes a purification tower (11), a waste collection hopper (12), a drain pipe (13), a drain valve (14), and a level gauge (15). The bottom of the purification tower (11) is connected to the ground. The purification tower (11) has a cavity inside. The waste collection hopper (12) is installed at the bottom of the cavity of the purification tower (11). The top of the drain pipe (13) is connected to the bottom of the waste collection hopper (12). The drain valve (14) is installed on the drain pipe (13). The level gauge (15) is installed in the cavity of the purification tower (11).

3. The cement kiln dust and nitric acid integration purification device according to claim 2, characterized in that, The catalytic mechanism (02) includes a guide plate (21), a catalytic filter layer (22), multiple sets of hydrophobic plates (23) and a chimney (24). The guide plate (21) is installed in the cavity of the purification tower (11), the catalytic filter layer (22) is installed in the cavity of the purification tower (11), the multiple sets of hydrophobic plates (23) are all installed at the top inside the cavity of the purification tower (11), and the chimney (24) is installed on the purification tower (11) and communicates with the cavity of the purification tower (11).

4. The cement kiln dust and flue gas integrated purification device according to claim 2, characterized in that, The heat exchange mechanism (03) includes an air inlet pipe (31), a spiral baffle (32), a heat conduction plate (33), a hinge (34), a cleaning cover (35), a filter box (36), and a check valve (37). The air inlet pipe (31) is installed on the purification tower (11), the spiral baffle (32) is spirally installed on the inner wall of the purification tower (11), the heat conduction plate (33) is installed in the cavity of the purification tower (11), the hinge (34) is installed on the air inlet pipe (31), the cleaning cover (35) is installed on the hinge (34), the filter box (36) is installed between the air inlet pipe (31) and the purification tower (11), and the check valve (37) is installed on the heat conduction plate (33).

5. The cement kiln dust and nitric acid integration purification apparatus of claim 4, wherein The vibration mechanism (04) includes a motor (41), a reducer (42), two sets of first rotating shafts (43), two sets of vibrating blocks (44), two sets of first pulleys (45) and a first belt (46). The motor (41) is installed on the purification tower (11). The output end of the motor (41) is connected to the input end of the reducer (42). The output end of the reducer (42) is connected to the input end of the first set of first rotating shafts (43). The second set of first rotating shafts (43) is rotatably installed in the interlayer between the purification tower (11) and the heat-conducting plate (33). The two sets of vibrating blocks (44) are respectively installed on the two sets of first rotating shafts (43). The two sets of first pulleys (45) are respectively installed on the two sets of vibrating blocks (44). The first belt (46) is tensioned between the two sets of first pulleys (45).

6. A cement kiln dust and flue gas integrated cleaning device as claimed in claim 5, wherein, The transmission mechanism (05) includes a crossbeam (51), a right-angle steering gear (52), a transmission shaft (53), two sets of second pulleys (54) and a second belt (55). The crossbeam (51) is mounted on the heat-conducting plate (33), the right-angle steering gear (52) is mounted on the crossbeam (51), the transmission shaft (53) is rotatably mounted on the heat-conducting plate (33) and connected to the input end of the right-angle steering gear (52), the two sets of second pulleys (54) are respectively mounted on the transmission shaft (53) and the first set of first rotating shafts (43), and the second belt (55) is tensioned between the two sets of second pulleys (54).

7. The cement kiln dust and nitric acid integration purification apparatus of claim 6, wherein The spraying mechanism (06) includes a sleeve (61), a water supply pipe (62), a spraying disc (63), and multiple sets of spray heads (64). The sleeve (61) is mounted on the crossbeam (51), the water supply pipe (62) is mounted on the sleeve (61), the power input end of the spraying disc (63) is connected to the power output end of the right-angle steering gear (52), the spraying disc (63) is internally connected to the water supply pipe (62), and multiple sets of spray heads (64) are all mounted on the spraying disc (63).

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