Fixed source flue gas honeycomb denitration catalyst coating device

Abstract

The utility model discloses a honeycomb denitration catalyst coating device for stationary source flue gas, which belongs to the technical field of denitration catalyst coating and comprises a transfer area control cabinet, a transfer mechanical arm, a feeding belt conveyor, a catalyst before coating, a weighing device before coating, a weighing device after coating and a discharging belt conveyor. A pre-coating catalyst is mounted on the feeding belt conveyor, and a pre-coating weighing device is arranged at an outlet of the feeding belt conveyor; a purged catalyst is mounted on the blanking belt conveyor, and a coated weighing device is arranged at an inlet of the blanking belt conveyor; the transfer area control cabinet is in communication connection with the transfer mechanical arm; the feeding belt conveyor and the discharging belt conveyor are in communication connection with the transfer area control cabinet. And the pre-coating weighing device and the post-coating weighing device are respectively in communication connection with the transfer area control cabinet. Manual coating is replaced by communication connection, so that the problem of high labor intensity is solved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of denitration catalyst coating, and in particular relates to a fixed source flue gas honeycomb denitration catalyst coating device. Background Art

[0002] Stationary-source flue gas denitrification generally refers to SCR (selective catalytic reduction) denitrification, as opposed to mobile-source denitrification of automobile exhaust. This denitrification is used in coal-fired power plants and non-electric industries such as steel, coking, and cement. SCR denitrification involves the oxidation-reduction reaction of nitrogen oxides (NOx) in the flue gas with a reducing agent in the presence of a denitrification catalyst, producing harmless nitrogen and water. With increasingly stringent national NOx emission standards, ultra-low emission retrofits for coal-fired power plants have been largely completed. However, due to the complex dust and sulfur content of flue gas and low exhaust temperatures (160-300°C) in non-electric industries such as steel, coking, and cement, denitrification catalysts exhibit low denitrification efficiency at low temperatures. This low denitrification efficiency is primarily due to the catalyst's poor sulfur tolerance at low temperatures.

[0003] In order to solve the problem of poor sulfur resistance of denitration catalysts under low temperature conditions, it is necessary to develop low-temperature and high-sulfur-resistant denitration catalysts. At present, there are two main preparation methods for low-temperature and high-sulfur-resistant denitration catalysts, one is the overall extrusion preparation, and the other is the coating treatment of the shaped catalyst. The coating treatment of the shaped catalyst currently relies mainly on manual operation, that is, the shaped catalyst is manually placed in a container filled with coating liquid for coating. After reaching the coating height and coating time, it is manually picked up and placed on the purge table, and purged with compressed air. Since the mass of a single shaped catalyst is about 10kg and the length is 600-1300mm, manual operation is not only labor-intensive and inefficient, but also difficult to achieve uniform coating. Therefore, an automatic coating device is urgently needed to solve the above problems. At present, the coating devices on the market are mainly used on mobile source automobile exhaust denitrification catalysts. Most of them are cylinders with circular cross-sections and short lengths, with more holes, while fixed source flue gas honeycomb denitrification catalysts have square cross-sections and longer lengths, with fewer holes. This makes it impossible to directly apply the coating devices used for mobile source automobile exhaust denitrification catalysts to fixed source denitrification catalysts. The existing fixed source flue gas honeycomb denitrification catalysts require manual coating, which is labor-intensive, and the active components are uneven and difficult to operate. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a fixed source flue gas honeycomb denitration catalyst coating device to solve the problem that the existing fixed source flue gas honeycomb denitration catalyst requires manual coating.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides a fixed source flue gas honeycomb denitrification catalyst coating device, comprising: a transfer area control cabinet, a transfer mechanical arm, a feeding belt conveyor, a pre-coating catalyst, a pre-coating weighing device, a post-coating weighing device and a feeding belt conveyor;

[0007] The feeding belt conveyor and the unloading belt conveyor are provided with grooves, the grooves of the feeding belt conveyor are used to fix the catalyst before coating, and the discharge end of the feeding belt conveyor is provided with a weighing device before coating; the grooves of the unloading belt conveyor are used to fix the catalyst after purging, and the feed end of the unloading belt conveyor is provided with a weighing device after coating;

[0008] The transfer area control cabinet is communicatively connected to the transfer robotic arm; the loading belt conveyor and the unloading belt conveyor are respectively communicatively connected to the transfer area control cabinet; the pre-coating weighing device and the post-coating weighing device are respectively communicatively connected to the transfer area control cabinet.

[0009] Furthermore, it also includes: a coating liquid preparation tank, a coating liquid transfer pump, a coating area control cabinet, a porous support plate, a coating tank, a purge residual liquid collection tank, a purge residual liquid reflux pump, a diversion trough, a first valve, a first liquid level gauge, a second liquid level gauge and a second valve;

[0010] A first liquid level gauge is provided outside the coating tank;

[0011] A porous support plate is provided inside the purge residual liquid collection tank, and a second liquid level gauge is provided outside the purge residual liquid collection tank;

[0012] The coating liquid preparation tank, coating liquid transfer pump and coating tank are connected in sequence through pipelines, and a first valve is installed on the pipeline; the coating tank is connected to the purge residual liquid collection tank through a guide groove; the purge residual liquid collection tank is connected to the coating liquid preparation tank through a purge residual liquid reflux pump pipeline; the purge residual liquid collection tank, the second valve and the purge residual liquid reflux pump are connected in sequence through pipelines; the second liquid level gauge, the purge residual liquid reflux pump and the second valve are communicatively connected to the coating area control cabinet; the second liquid level gauge, the purge residual liquid reflux pump and the second valve are interlocked; the first liquid level gauge, the coating liquid transfer pump, the first valve are communicatively connected to the coating area control cabinet.

[0013] Furthermore, the coated catalyst is placed inside a purge residual liquid collection tank, and the coated catalyst is placed inside a coating tank.

[0014] Furthermore, it also includes: a sealed gripper, a non-sealed gripper, a truss, a horizontal track and a vertical track;

[0015] The transverse track is installed on the upper part of the coating tank, and a vertical track is fixedly installed on the transverse track. The transverse track is installed on the truss, and sealed grippers and non-sealed grippers are installed on the vertical track. The sealed grippers are used to grab the catalyst after coating, and the non-sealed grippers are used to grab the catalyst during coating; the sealed grippers and non-sealed grippers can move left and right on the transverse track, and the sealed grippers and non-sealed grippers can move up and down on the vertical track.

[0016] Furthermore, it also includes: a transfer robot arm gripper;

[0017] The transfer robot arm gripper is installed on the transfer robot arm.

[0018] Furthermore, it also includes: an air compressor;

[0019] The air compressor is connected to the sealing gripper through a hose, and the air compressor, the sealing gripper and the porous support plate are connected in sequence.

[0020] Furthermore, the truss is communicatively connected to the transfer area control cabinet.

[0021] Furthermore, the sealing gripper is provided with a sealing ring.

[0022] Furthermore, the transfer area control cabinet includes a display unit; the display unit is communicatively connected to the transfer area control cabinet, and the display unit is used to display weighing results and setting procedures.

[0023] Furthermore, the display unit is used to display weighing data of the weighing device before coating and the weighing device after coating.

[0024] The utility model has at least the following beneficial effects:

[0025] 1. The utility model discloses a fixed-source flue gas honeycomb denitration catalyst coating device, belonging to the field of denitration catalyst coating technology, comprising: a transfer area control cabinet, a transfer robotic arm, a feeding belt conveyor, a pre-coating catalyst, a pre-coating weighing device, a post-coating weighing device, and a discharge belt conveyor; the feeding belt conveyor is equipped with a pre-coating catalyst, and the feeding belt conveyor outlet is equipped with a pre-coating weighing device; the discharge belt conveyor is equipped with a post-purge catalyst, and the discharge belt conveyor inlet is equipped with a post-coating weighing device; the transfer area control cabinet is communicatively connected to the transfer robotic arm; the feeding belt conveyor and the discharge belt conveyor are respectively communicatively connected to the transfer area control cabinet; the pre-coating weighing device and the post-coating weighing device are respectively communicatively connected to the transfer area control cabinet. Replacing manual coating with communication connection solves the problem of high labor intensity and improves production efficiency.

[0026] 2. The utility model provides a fixed source flue gas honeycomb denitrification catalyst coating device, which also includes: a coating liquid preparation tank, a coating liquid transfer pump, a coating area control cabinet, a porous support plate, a coating tank, a purge residual liquid collection tank, a purge residual liquid reflux pump, a guide groove, a first valve, a first liquid level gauge, a second liquid level gauge and a second valve; a first liquid level gauge is provided outside the coating tank; a porous support plate is provided inside the purge residual liquid collection tank, and a second liquid level gauge is provided outside the purge residual liquid collection tank; the coating liquid preparation tank, the coating liquid transfer pump and the coating tank are connected in sequence through a pipeline, and the first valve is installed on the pipeline; the coating tank is connected to the purge residual liquid collection tank through a guide groove; the purge residual liquid collection tank is connected to the coating liquid preparation tank through a purge residual liquid reflux pump pipeline; the purge residual liquid collection tank, the purge residual liquid reflux pump and the second valve are connected in sequence through a pipeline; the second liquid level gauge, the purge residual liquid reflux pump and the second valve are communicatively connected to the coating area control cabinet; the first liquid level gauge, the coating liquid transfer pump and the first valve are communicatively connected to the coating area control cabinet. The liquid level is set according to the coating height of the catalyst. The coating tank is equipped with a liquid level interlocking control. When the liquid level is lower than the lower limit of the catalyst coating height, the pump starts and the valve opens automatically to replenish the liquid from the coating liquid preparation tank to the catalyst coating height, ensuring the stability of the required coating height of the catalyst and the uniformity of the active components on the catalyst surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 This is a structural schematic diagram of a fixed source flue gas honeycomb denitrification catalyst coating device provided by the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the medium porous support plate;

[0030] Figure 3 This is a schematic diagram of the structure of the catalyst to be coated in a fixed source flue gas honeycomb denitration catalyst coating device provided by the utility model;

[0031] Among them: 1. Transfer area control cabinet; 2. Transfer robot arm; 3. Loading belt conveyor; 4. Vertical track; 5. Weighing device before coating; 6. Coating liquid preparation tank; 7. Coating liquid transfer pump; 8. Coating area control cabinet; 9. Porous support plate; 10. Coating tank; 11. Purge residual liquid collection tank; 12. Purge residual liquid reflux pump; 13. Air compressor; 14. Transfer robot arm gripper; 15. Sealed gripper; 16. Non-sealed gripper; 17. Truss; 18. Weighing device after coating; 19. Unloading belt conveyor; 20. Horizontal track; 21. Guide trough; 22. First valve; 23. First liquid level gauge; 24. Second liquid level gauge; 25. Second valve. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0033] The following detailed descriptions are all exemplary descriptions and are intended to provide further details of the present invention. Unless otherwise specified, all technical terms used in this utility model have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in this utility model are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this utility model.

[0034] Example 1

[0035] See also Figures 1 to 2 The utility model provides a fixed source flue gas honeycomb denitrification catalyst coating device, including: a transfer area control cabinet 1, a transfer robotic arm 2, a loading belt conveyor 3, a vertical track 4, a pre-coating weighing device 5, a coating liquid preparation tank 6, a coating liquid transfer pump 7, a coating area control cabinet 8, a porous support plate 9, a coating tank 10, a purge residual liquid collection tank 11, a purge residual liquid reflux pump 12, an air compressor 13, a transfer robotic arm gripper 14, a sealed gripper 15, a non-sealed gripper 16, a truss 17, a post-coating weighing device 18, a unloading belt conveyor 19, a horizontal track 20, a guide groove 21, a first valve 22, a first liquid level gauge 23, a second liquid level gauge 24 and a second valve 25.

[0036] The feeding belt conveyor 3 and the unloading belt conveyor 19 are provided with grooves, the groove of the feeding belt conveyor 3 is installed with the pre-coating catalyst, and the discharge end of the feeding belt conveyor 3 is provided with a pre-coating weighing device 5; the groove of the unloading belt conveyor 19 is installed with the post-purge catalyst, and the feed end of the unloading belt conveyor 19 is provided with a post-coating weighing device 18;

[0037] The transfer area control cabinet 1 is communicatively connected to the transfer robotic arm 2; the loading belt conveyor 3 and the unloading belt conveyor 19 are respectively communicatively connected to the transfer area control cabinet 1; the pre-coating weighing device 5 and the post-coating weighing device 18 are respectively communicatively connected to the transfer area control cabinet 1; the transfer robotic arm gripper 14 is installed on the transfer robotic arm 2.

[0038] The coating tank 10 is provided with a first liquid level gauge 23; the inside of the purge residual liquid collecting tank 11 is provided with a porous support plate 9, the porous support plate 9 is made of corrosion-resistant material, and the outside of the purge residual liquid collecting tank 11 is provided with a second liquid level gauge 24; the coating liquid preparation tank 6 is made of corrosion-resistant material, a venting pipeline is provided on the top, a stirring motor is provided in the middle of the top, and a transmission stirring paddle is fixed to the shaft end of the stirring motor. The stirring paddle is fixed on the stirring shaft in two layers to ensure the mixing uniformity of the coating liquid during the configuration process; the coating liquid preparation tank 6, the coating liquid transfer pump 7 and the coating tank 10 are connected in sequence through a pipeline, and a first valve 2 is installed on the pipeline. 2; the coating tank 10 is connected to the purge residual liquid collection tank 11 through a guide groove 21; the purge residual liquid collection tank 11 is connected to the coating liquid preparation tank 6 through a purge residual liquid reflux pump 12 pipeline; the purge residual liquid collection tank 11, the second valve 25 and the purge residual liquid reflux pump 12 are connected in sequence through pipelines; the second liquid level gauge 24, the purge residual liquid reflux pump 12 and the second valve 25 are connected to the coating area control cabinet 8 in communication; the second liquid level gauge 24, the purge residual liquid reflux pump 12 and the second valve 25 are interlocked; the first liquid level gauge 23, the coating liquid transfer pump 7 and the first valve 22 are connected to the coating area control cabinet 8 in communication. The catalyst after coating is placed inside the purge residual liquid collection tank 11, and the catalyst during coating is placed inside the coating tank 10.

[0039] The transverse track 20 is installed on the upper part of the coating tank 10, and the vertical track 4 is fixedly installed on the transverse track 20. The transverse track 20 is installed on the truss 17, and the vertical track 4 is installed with a sealed gripper 15 and a non-sealed gripper 16. The sealed gripper 15 is used to grab the catalyst after coating, and the sealed gripper 15 is provided with a sealing ring; the non-sealed gripper 16 is used to grab the catalyst during coating; the sealed gripper 15 and the non-sealed gripper 16 can move left and right on the transverse track 20, and the sealed gripper 15 and the non-sealed gripper 16 can move up and down on the longitudinal track 4.

[0040] The air compressor 13 is connected to the sealing gripper 15 through a hose, and the air compressor 13, the sealing gripper 15, the coated catalyst and the porous support plate 9 are connected in sequence; the truss 17 is communicatively connected to the transfer area control cabinet 1.

[0041] When the actual liquid level is higher than the set liquid level upper limit, the purge residual liquid reflux pump 12 is started, the second valve 25 is opened, and the purge residual liquid in the purge residual liquid collection tank 11 is refluxed to the coating liquid preparation tank 6, ensuring the recycling of the coating liquid.

[0042] The transfer area control cabinet 1 includes a display unit; the display unit is communicatively connected to the transfer area control cabinet 1, and the display unit is used to display the weighing results of the weighing device 5 before coating and the weighing device 18 after coating.

[0043] Example 2

[0044] The utility model provides a fixed source flue gas honeycomb denitrification catalyst coating device, the working principle is: the manipulator places the pre-coating catalyst on the feeding belt conveyor 3, and the feeding belt conveyor 3 has movable buckles on both sides, which can be adjusted according to the length of the catalyst to fix the pre-coating catalyst to ensure that it will not deviate during the belt transmission process. When the pre-coating catalyst is transmitted to the other end, the belt slows down and pauses, the transfer manipulator 2 is started, and the pre-coating catalyst is grabbed and placed on the pre-coating weighing device 5 for weighing, and the weighing quality data is transmitted to the transfer area control cabinet 1, and the transfer manipulator 2 continues to grab the pre-coating catalyst to the truss 17, and the non-sealed gripper 16 grabs the pre-coating catalyst and slides to the right through the truss horizontal track 20 to the top of the coating tank 10. The non-sealed gripper 16 descends through the vertical track 4, and when the bottom of the catalyst contacts the bottom of the coating tank 10, the non-sealed gripper 16 is released, and the pre-coating catalyst is coated. The coating height and coating time are determined according to the process. When the coating time is full, After meeting the requirements, the sealing gripper 15 is started, the catalyst being coated is grabbed and moved to the top of the purge residual liquid collection tank 11 through the horizontal track 20, and the sealing gripper 15 is lowered through the vertical track 4. When the bottom of the catalyst contacts the porous support plate 9, the sealing gripper 15 stops descending, but the sealing gripper 15 continues to maintain the sealed grabbing state. The coating liquid spilled during the movement to the right flows into the purge residual liquid collection tank 11 through the guide groove 21, and the air compressor 13 is started to purge the coated catalyst. The purge air volume and time depend on the coating process. After the purge time meets the requirements, the sealing gripper 15 lifts the coated catalyst to the truss 17, and the transfer robot 2 is started to grab the coated catalyst and then transfer it to the post-coating weighing device 18 for weighing. The weighing quality data is transmitted to the transfer area control cabinet 1, and the transfer robot 2 continues to grab the purged catalyst and put it on the unloading belt conveyor 19. When the purged catalyst is transported to the other end of the belt, the purged catalyst is manually unloaded to the stacking area.

[0045] See also Figure 3As shown, compared with the existing technology, the utility model provides a fixed source flue gas honeycomb denitration catalyst coating device, which is used for coating denitration catalysts with a long square cross-section (600-1300mm), solving the problem that the coating device of mobile source automobile exhaust denitration catalyst cannot be directly applied to the fixed source denitration catalyst, and the existing fixed source flue gas honeycomb denitration catalyst requires manual coating, which is labor-intensive, and the active components are uneven and the operation is difficult. The utility model is simple to operate, has a low failure rate, a high degree of automation, and improves the production efficiency of high sulfur resistance honeycomb denitration catalysts.

[0046] It is understood from common technical knowledge that the present invention may be implemented through other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A fixed source flue gas honeycomb denitrification catalyst coating device, characterized in that: include: A transfer area control cabinet (1), a transfer robot arm (2), a loading belt conveyor (3), a pre-coating weighing device (5), a post-coating weighing device (18), and a unloading belt conveyor (19); The feeding belt conveyor (3) and the unloading belt conveyor (19) are provided with grooves, the grooves of the feeding belt conveyor (3) are used to fix the catalyst before coating, and the discharge end of the feeding belt conveyor (3) is provided with a weighing device (5) before coating; the grooves of the unloading belt conveyor (19) are used to fix the catalyst after purging, and the feed end of the unloading belt conveyor (19) is provided with a weighing device (18) after coating; The transfer area control cabinet (1) is communicatively connected to the transfer robot arm (2); the loading belt conveyor (3) and the unloading belt conveyor (19) are respectively communicatively connected to the transfer area control cabinet (1); and the pre-coating weighing device (5) and the post-coating weighing device (18) are respectively communicatively connected to the transfer area control cabinet (1).

2. A fixed source flue gas honeycomb denitration catalyst coating device according to claim 1, characterized in that: Also includes: A coating liquid preparation tank (6), a coating liquid transfer pump (7), a coating area control cabinet (8), a porous support plate (9), a coating tank (10), a purge residual liquid collection tank (11), a purge residual liquid reflux pump (12), a guide groove (21), a first valve (22), a first liquid level gauge (23), a second liquid level gauge (24) and a second valve (25); The coating tank (10) is provided with a first liquid level gauge (23) outside; A porous support plate (9) is provided inside the purge residual liquid collection tank (11), and a second liquid level meter (24) is provided outside the purge residual liquid collection tank (11); The coating liquid preparation tank (6), the coating liquid transfer pump (7) and the coating tank (10) are connected in sequence through a pipeline, and a first valve (22) is installed on the pipeline; the coating tank (10) is connected to the purge residual liquid collection tank (11) through a guide groove (21); the purge residual liquid collection tank (11) is connected to the coating liquid preparation tank (6) through a purge residual liquid reflux pump (12) pipeline; the purge residual liquid collection tank (11), the second valve (25) and the purge residual liquid reflux pump (12) are connected in sequence through a pipeline; the second liquid level meter (24), the purge residual liquid reflux pump (12) and the second valve (25) are connected in communication with the coating area control cabinet (8); the second liquid level meter (24), the purge residual liquid reflux pump (12) and the second valve (25) are interlocked; the first liquid level meter (23), the coating liquid transfer pump (7) and the first valve (22) are connected in communication with the coating area control cabinet (8).

3. A fixed source flue gas honeycomb denitration catalyst coating device according to claim 2, characterized in that: The coated catalyst is placed inside the purge residual liquid collection tank (11), and the coated catalyst is placed inside the coating tank (10).

4. A fixed source flue gas honeycomb denitration catalyst coating device according to claim 2, characterized in that: Also includes: A sealed gripper (15), a non-sealed gripper (16), a truss (17), a transverse track (20) and a vertical track (4); The transverse track (20) is installed on the upper part of the coating tank (10), and a vertical track (4) is fixedly installed on the transverse track (20). The transverse track (20) is installed on the truss (17), and a sealed gripper (15) and a non-sealed gripper (16) are installed on the vertical track (4). The sealed gripper (15) is used to grab the catalyst after coating, and the non-sealed gripper (16) is used to grab the catalyst during coating. The sealed gripper (15) and the non-sealed gripper (16) can move left and right on the transverse track (20), and the sealed gripper (15) and the non-sealed gripper (16) can move up and down on the vertical track (4).

5. The fixed source flue gas honeycomb denitration catalyst coating device according to claim 1 is characterized in that: Also includes: Transfer robot gripper (14); The transfer robot arm gripper (14) is mounted on the transfer robot arm (2).

6. A fixed source flue gas honeycomb denitration catalyst coating device according to claim 4, characterized in that: Also includes: Air compressor (13); The air compressor (13) is connected to the sealing gripper (15) via a hose, and the air compressor (13), the sealing gripper (15), the coated catalyst (27) and the porous support plate (9) are connected in sequence.

7. A fixed source flue gas honeycomb denitration catalyst coating device according to claim 4, characterized in that: The truss (17) is communicatively connected to the transfer area control cabinet (1).

8. The fixed source flue gas honeycomb denitration catalyst coating device according to claim 4 is characterized in that: The sealing gripper (15) is provided with a sealing ring.

9. The fixed source flue gas honeycomb denitration catalyst coating device according to claim 1, characterized in that: The transfer area control cabinet (1) comprises a display unit; the display unit is communicatively connected to the transfer area control cabinet (1), and the display unit is used to display weighing results and setting programs.

10. A fixed source flue gas honeycomb denitration catalyst coating device according to claim 9, characterized in that: The display unit is used to display weighing data of the pre-coating weighing device (5) and the post-coating weighing device (18).

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