Active carbon circulation system for remote regeneration of desulfurization and denitrification active carbon

Abstract

The utility model provides an activated carbon circulation system for remote regeneration of desulfurization and denitrification activated carbon, after a purification reactor and a regeneration system are separated in space, the cyclic utilization of activated carbon between the purification reactor and the regeneration system can still be realized, and the activated carbon circulation system comprises a feeding and storage system for storing the regenerated activated carbon; the charging and adsorption system is communicated with the loading and storage system and is used for extracting the regenerated activated carbon and conveying the regenerated activated carbon into a purification reactor to remove and purify flue gas pollutants; the discharging and storing system is communicated with the charging and adsorbing system and is used for receiving and storing the adsorbed activated carbon discharged by the purifying reactor; the transfer system is communicated between the discharging and storing system and the activated carbon regeneration system and is used for conveying the adsorbed activated carbon stored in the discharging and storing system to the activated carbon regeneration system for regeneration; the transfer system further communicates between the activated carbon regeneration system and the feeding and storage system and is used for conveying the regenerated activated carbon to the feeding and storage system for storage.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the industrial flue gas desulfurization and denitrification purification technical field relates to a kind of activated carbon circulating system for desulfurization and denitrification activated carbon off-site regeneration. BACKGROUND

[0002] As a kind of extremely potential flue gas purification method, activated carbon desulfurization and denitrification integrated technology (hereinafter referred to as "integrated technology") has been widely used in the flue gas purification process of steel plant, power plant and the like. At present, more than 100 sets of activated carbon flue gas purification devices have been put into operation in China, and most of them are distributed in the processes such as sintering, pelletizing and coking related to steel production, which have complex flue gas pollutant compositions and high treatment difficulty. The integrated technology mainly utilizes the adsorption characteristics of activated carbon to realize efficient and synergistic removal of pollutants including dust, dioxin, heavy metal, SO2, NO X , etc. At the same time, due to its advantages such as short process, high reliability, low operation cost, high resource utilization degree of by-products and no secondary pollution, combined with the increasingly stringent environmental protection standards, the integrated technology is still the first choice for new construction or transformation of flue gas purification device in each steel enterprise, and multiple sets of activated carbon flue gas purification devices have been built in one plant simultaneously or successively by multiple enterprises as flue gas purification means for different processes.

[0003] The conventional activated carbon desulfurization and denitrification integrated device (hereinafter referred to as "integrated device") mainly includes a purification system, a regeneration system, an activated carbon circulating system and an acid making system, etc. The regeneration system is a key system of the integrated device, and its main function is to restore the purification activity of activated carbon, so that it can be recycled in the flue gas treatment process, and the acid gas rich in SO2 generated in the regeneration process is collected and sent to the acid making system to produce concentrated sulfuric acid, realizing the resource utilization of by-products. However, since the purification system has high adaptability to flue gas volume, it can purify various sizes of flue gas generated in different processes, so that the acid gas generated by the activated carbon regeneration of part of the integrated devices for treating small-scale flue gas is too small to produce acid, and other acid gas conversion methods such as ammonium sulfate and sodium metabisulfite have many problems such as poor production stability, high equipment failure rate and high operation cost according to the existing engineering cases. In addition, the small amount of activated carbon regeneration will not significantly reduce the equipment investment of the regeneration system.

[0004] For the above-mentioned situation that multiple sets of integrated devices are needed to be built in the plant, and one or more of them are small-scale, the activated carbon of small-scale integrated devices is sent to the regeneration system of large-scale integrated devices for regeneration, or multiple small-scale integrated devices share one regeneration system, i.e. the activated carbon of small-scale integrated devices is regenerated off-site, which can effectively reduce the total investment, reduce the device area and the number of equipment, facilitate enterprise management, and meet the stable operation conditions of acid making device at the same time, achieving multiple purposes at once.

[0005] In the conventional integrated device, the activated carbon is circulated between the purification reactor and the regeneration system, which can be achieved by two Z-shaped chain conveyors, while in the integrated device with off-site regeneration, the distance between the purification reactor and the regeneration system is relatively far, so other ways are needed to realize the circulation and conveying of the activated carbon. Practical new type content

[0006] In order to realize the off-site regeneration of activated carbon in small-scale integrated device, the utility model provides a kind of activated carbon circulating system for desulfurization and denitrification activated carbon off-site regeneration, purification reactor and regeneration system are split apart in space, still can realize the circulation and utilization of activated carbon between the two, reduce operating cost.

[0007] The technical scheme adopted by the utility model to solve its technical problems is:

[0008] A kind of activated carbon circulating system for desulfurization and denitrification activated carbon off-site regeneration, comprising:

[0009] Feeding and storage system, for storing the activated carbon after regeneration;

[0010] Feeding and adsorption system, which is communicated with the feeding and storage system, is used to extract the activated carbon after regeneration stored in the feeding and storage system and convey it to the purification reactor to remove and purify flue gas pollutants;

[0011] Discharging and storage system, which is communicated with the feeding and adsorption system, is used to receive the activated carbon with flue gas pollutants adsorbed discharged by the purification reactor and store it;

[0012] Transportation system, which is communicated between the discharging and storage system and the activated carbon regeneration system, is used to convey the activated carbon with flue gas pollutants adsorbed stored in the discharging and storage system to the activated carbon regeneration system for regeneration;The transportation system is also communicated between the activated carbon regeneration system and the feeding and storage system, for conveying the activated carbon after regeneration to the feeding and storage system for storage.

[0013] Further, the feeding and storage system comprises a feeding buffer hopper, a feeding hopper lifting machine and a feeding bin, the outlet of the feeding buffer hopper is connected with the inlet of the feeding hopper lifting machine, the outlet of the feeding hopper lifting machine is connected with the feeding bin, and the outlet of the feeding bin is connected with the feeding and adsorption system.

[0014] Further, the feeding and adsorption system comprises a feeding hopper lifting machine, a feeding belt conveyor and a purification reactor, the inlet of the feeding hopper lifting machine is connected with the feeding and storage system, the outlet of the feeding hopper lifting machine is connected with the inlet of the feeding belt conveyor, the outlet of the feeding belt conveyor is connected with the inlet of the purification reactor, and the outlet of the purification reactor is connected with the discharging and storage system.

[0015] Further, the discharging and storing system comprises a discharging belt conveyor, a discharging hopper elevator and a discharging bin, the discharging belt conveyor is connected with the outlet of the purification reactor, the outlet of the discharging belt conveyor is connected with the feeding inlet of the discharging hopper elevator, the discharging outlet of the discharging hopper elevator is connected with the inlet of the discharging bin, and the outlet of the discharging bin is connected with the transfer system.

[0016] Further, the transfer system comprises a transport vehicle b, a regeneration buffer hopper and a regeneration hopper elevator, the outlet of the regeneration buffer hopper is connected with the feeding inlet of the regeneration hopper elevator, the discharging outlet of the regeneration hopper elevator is connected with the activated carbon regeneration system, and the transport vehicle b circulates between the regeneration buffer hopper and the discharging bin and between the activated carbon regeneration system and the feeding and storing system.

[0017] Further, the transfer system comprises a ton bag, a first flat car, a transport vehicle a, a first electric hoist, a second electric hoist, a second flat car, a third electric hoist and a fourth electric hoist, the ton bag is used for being connected with the discharging bin or the activated carbon regeneration system to receive the activated carbon discharged from the discharging bin or the activated carbon regeneration system, the first flat car supports the ton bag receiving the activated carbon discharged from the discharging bin and is used for transferring the ton bag to a position below the first electric hoist, the second electric hoist is arranged above the inlet of the activated carbon regeneration system, the second flat car supports the ton bag receiving the activated carbon discharged from the activated carbon regeneration system and is used for transferring the ton bag to a position below the third electric hoist, the fourth electric hoist is arranged above the inlet of the feeding and storing system, and the transport vehicle a circulates between the first electric hoist and the second electric hoist and between the third electric hoist and the fourth electric hoist.

[0018] The beneficial effects of the utility model include:

[0019] The regenerated activated carbon is stored by the feeding and storing system, is extracted by the feeding and adsorption system, is conveyed into the purification reactor to purify flue gas, is discharged into the discharging and storing system after being used, is finally conveyed to a regeneration system far away by the transfer system to be regenerated, and the regenerated activated carbon is transferred back to the feeding and storing system to be stored for standby, the problem that the activated carbon is recycled between the purification reactor and the regeneration system after being separated in space is solved, the demand of the activated carbon of the small-scale integrated device for regeneration in a different place is met, the efficient circulation of the activated carbon is ensured, the activated carbon of the small-scale integrated device can be sent to the regeneration system of the large-scale integrated device to be regenerated, or multiple sets of small-scale integrated devices share one set of regeneration system, thereby the total investment of the project is effectively reduced, the device occupies less land, and the number of equipment is reduced, and the problem that the amount of acid gas generated by the regeneration of the activated carbon of the small-scale integrated device is too small to produce acid is solved.

[0020] The feeding and storage system realizes effective storage and stable supply of the regenerated activated carbon through the setting of the feeding buffer hopper, the feeding hopper lifting machine and the feeding bin; the feeding and adsorption system ensures that the regenerated activated carbon can smoothly enter the purification reactor to remove and purify the flue gas pollutants through the cooperation of the feeding hopper lifting machine, the feeding belt machine and the purification reactor; the discharging and storage system can timely receive and store the activated carbon discharged from the purification reactor and adsorbed with the flue gas pollutants through the discharging belt machine, the discharging hopper lifting machine and the discharging bin; the transfer system can efficiently transport the activated carbon adsorbed with pollutants to the regeneration system and send the regenerated activated carbon back to the feeding and storage system, and the whole system has compact structure, reasonable process and close connection between parts, thereby ensuring efficient and stable operation of the activated carbon circulation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure schematic diagram of the system of the utility model;

[0022] Figure 2 is the equipment configuration scheme of the transfer system in embodiment 1 of the utility model;

[0023] Figure 3 is the equipment configuration scheme of the transfer system in embodiment 2 of the utility model.

[0024] In the drawing: 10 is a feeding and storage system; 11 is a feeding buffer hopper; 12 is a feeding hopper lifting machine; 13 is a feeding bin; 20 is a feeding and adsorption system; 21 is a feeding hopper lifting machine; 22 is a feeding belt machine; 23 is a purification reactor; 30 is a discharging and storage system; 31 is a discharging belt machine; 32 is a discharging hopper lifting machine; 33 is a discharging bin; 40 is a transfer system; 4011 is a ton bag; 4012 is a first flat car; 4013 is a transport car a; 4014 is a first electric hoist; 4015 is a second electric hoist; 4016 is a second flat car; 4017 is a third electric hoist; 4018 is a fourth electric hoist; 4021 is a transport car b; 4022 is a regeneration buffer hopper; 4023 is a regeneration hopper lifting machine; 50 is an activated carbon regeneration system. DETAILED DESCRIPTION

[0025] The technical solutions of the utility model will be described clearly and completely below with reference to the drawings, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0027] Embodiment 1:

[0028] The application provides a desulfurization and denitration activated carbon recycling system, which can recycle activated carbon in an integrated device for off-site regeneration.

[0029] Reference Figure 1 , comprising: a feeding and storing system 10, a feeding and adsorbing system 20, a discharging and storing system 30, a transfer system 40 and an activated carbon regeneration system 50; wherein the activated carbon regeneration system 50 is an existing desulfurization and denitration activated carbon regeneration system built at another place or a newly-built desulfurization and denitration activated carbon regeneration system built at another place.

[0030] The activated carbon with desulfurization and denitration adsorption capacity after regeneration is firstly fed into a feeding buffer hopper 11 in the feeding and storing system 10; the outlet of the feeding buffer hopper 11 is connected with the feeding port of a feeding elevator 12, and the discharging port of the feeding elevator 12 is connected with a feeding bin 13; the feeding and storing system 10 can realize the storage function of the activated carbon after regeneration, and the storage time is determined by the volume of the feeding bin 13.

[0031] After the activated carbon is discharged from the outlet of the feeding bin 13, it is fed into the feeding and adsorbing system 20 through the feeding port of a feeding elevator 21; the discharging port of the feeding elevator 21 is connected with the inlet of a feeding belt conveyor 22, and the outlet of the feeding belt conveyor 22 is connected with the inlet of a purification reactor 23; the feeding and adsorbing system 20 sends the activated carbon after regeneration into the purification reactor 23 to remove and purify the flue gas pollutants.

[0032] The outlet of the purification reactor 23 is connected with the inlet of a discharging belt conveyor 31, and the activated carbon is fed into the discharging and storing system 30; the outlet of the discharging belt conveyor 31 is connected with the feeding port of a discharging elevator 32, and the discharging port of the discharging elevator 32 is connected with the inlet of a discharging bin 33; the discharging and storing system 30 can realize the storage function of the activated carbon to be regenerated, and the storage time is determined by the volume of the discharging bin 33.

[0033] The activated carbon discharged from the outlet of the discharging bin 33 is fed into the transfer system 40, and the transfer system 40 is completed by cooperation of various transfer devices. In this embodiment, the following devices are combined, such as Figure 2: The activated carbon discharged from the discharge bin 33 is discharged into the ton bag 4011, and the ton bag 4011 containing the activated carbon discharged from the discharge bin 33 is transported to a position below the first electric hoist 4014 by using the first flat car 4012, and then the ton bag 4011 containing the activated carbon discharged from the discharge bin 33 is lifted onto the transport car a 4013 by using the first electric hoist 4014. This process can be repeated several times until the transport car a 4013 is full or the discharge bin 33 is empty. The transport car a 4013 travels to the vicinity of the activated carbon regeneration system 50, and the ton bag 4011 containing the activated carbon discharged from the discharge bin 33 is lifted into the activated carbon regeneration system 50 by using the second electric hoist 4015, thereby completing the addition of the activated carbon to be regenerated into the regeneration process. This process can be repeated several times until all the activated carbon in the ton bags 4011 on the transport car a 4013 is added into the activated carbon regeneration system 50. The regenerated activated carbon discharged from the activated carbon regeneration system 50 is discharged into the ton bag 4011, and the ton bag 4011 containing the activated carbon discharged from the activated carbon regeneration system 50 is transported to a position below the third electric hoist 4017 by using the second flat car 4016, and then the ton bag 4011 containing the activated carbon discharged from the activated carbon regeneration system 50 is lifted onto the transport car a 4013 by using the third electric hoist 4017. This process can be repeated several times until the transport car a 4013 is full. The transport car a 4013 travels back to the vicinity of the feeding and storage system 10, and the ton bag 4011 containing the activated carbon discharged from the activated carbon regeneration system 50 is lifted into the feeding and storage system 10 by using the fourth electric hoist 4018, thereby completing the addition of the regenerated activated carbon into the feeding and storage system 10. This process can be repeated several times until all the activated carbon in the ton bags 4011 on the transport car a 4013 is added into the feeding and storage system 10 or the feeding bin 13 is full.

[0034] At this point, the activated carbon circulation system for off-site regeneration of desulfurized and denitrified activated carbon according to the embodiment has completed a one-time circulation process of the activated carbon between the purification reactor and the regeneration system located at a different site. The off-site regeneration system can more effectively utilize activated carbon resources, especially when dealing with small-scale flue gas, avoiding the problem of being unable to produce acid due to insufficient acid gas. Through centralized regeneration, sufficient acid gas can be ensured for acid production, improving resource utilization and economic benefits, effectively reducing the total investment, reducing the device footprint, and reducing the number of equipment.

[0035] Example 2:

[0036] Another equipment combination mode of the transfer system 40 is provided in this embodiment, as shown in FIG. 4B. Figure 3The activated carbon discharged from the discharge bin 33 is discharged into the transport vehicle b4021, the transport vehicle b4021 filled with the activated carbon to be regenerated is driven to the vicinity of the activated carbon regeneration system 50, the activated carbon to be regenerated is discharged into the regeneration buffer hopper 4022, the outlet of the regeneration buffer hopper 4022 is connected with the inlet of the regeneration bucket elevator 4023, the discharge outlet of the regeneration bucket elevator 4023 is connected with the activated carbon regeneration system 50, and the addition of the activated carbon to be regenerated into the regeneration process is completed; the regenerated activated carbon discharged from the activated carbon regeneration system 50 is discharged into the transport vehicle b4021, the transport vehicle b4021 filled with the regenerated activated carbon is driven back to the vicinity of the feeding and storage system 10, and the regenerated activated carbon is discharged into the feeding buffer hopper 11.

[0037] In summary, after the purification reactor and the activated carbon regeneration system are split in space, the present application still realizes the recycling of the activated carbon between the two, and reduces the operation cost; after the present system is implemented, the integrated device is no longer limited by the construction site and the construction investment, and the device area and the construction investment are saved.

[0038] Obviously, the above embodiments are only examples for clearly illustrating, but not limit the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A desulfurization and denitrification activated carbon off-site regeneration activated carbon circulation system, characterized in that, The system comprises: a feeding and storing system (10) for storing regenerated activated carbon; a feeding and adsorbing system (20) connected with the feeding and storing system (10) for extracting the regenerated activated carbon stored in the feeding and storing system (10) and delivering the activated carbon to a purification reactor (23) for removing and purifying flue gas pollutants; a discharging and storing system (30) connected with the feeding and adsorbing system (20) for receiving the activated carbon adsorbed with flue gas pollutants discharged from the purification reactor (23) and storing the activated carbon; a transfer system (40) connected between the discharging and storing system (30) and an activated carbon regeneration system (50) for delivering the activated carbon adsorbed with flue gas pollutants stored in the discharging and storing system (30) to the activated carbon regeneration system (50) for regeneration; the transfer system (40) is also connected between the activated carbon regeneration system (50) and the feeding and storing system (10) for delivering the regenerated activated carbon to the feeding and storing system (10) for storage.

2. The activated carbon circulation system for off-site regeneration of desulfurization and denitrification activated carbon according to claim 1, characterized in that, The feeding and storing system (10) comprises a feeding buffer hopper (11), a feeding hopper elevator (12) and a feeding bin (13), the outlet of the feeding buffer hopper (11) is connected with the feeding inlet of the feeding hopper elevator (12), the outlet of the feeding hopper elevator (12) is connected with the feeding bin (13), and the outlet of the feeding bin (13) is connected with the feeding and adsorbing system (20).

3. The activated carbon circulation system for off-site regeneration of desulfurization and denitrification activated carbon according to claim 1, characterized in that, The feeding and adsorbing system (20) comprises a feeding hopper elevator (21), a feeding belt conveyor (22) and the purification reactor (23), the feeding inlet of the feeding hopper elevator (21) is connected with the feeding and storing system (10), the outlet of the feeding hopper elevator (21) is connected with the inlet of the feeding belt conveyor (22), the outlet of the feeding belt conveyor (22) is connected with the inlet of the purification reactor (23), and the outlet of the purification reactor (23) is connected with the discharging and storing system (30).

4. The activated carbon circulation system for off-site regeneration of desulfurization and denitrification activated carbon according to claim 1, characterized in that, The discharging and storing system (30) comprises a discharging belt conveyor (31), a discharging hopper elevator (32) and a discharging bin (33), the inlet of the discharging belt conveyor (31) is connected with the outlet of the purification reactor (23), the outlet of the discharging belt conveyor (31) is connected with the feeding inlet of the discharging hopper elevator (32), the outlet of the discharging hopper elevator (32) is connected with the inlet of the discharging bin (33), and the outlet of the discharging bin (33) is connected with the transfer system (40).

5. The activated carbon circulation system for off-site regeneration of desulfurization and denitrification activated carbon according to claim 4, characterized in that, The transfer system (40) comprises a transport vehicle b (4021), a regeneration buffer hopper (4022) and a regeneration hopper elevator (4023), the outlet of the regeneration buffer hopper (4022) is connected with the feeding inlet of the regeneration hopper elevator (4023), the outlet of the regeneration hopper elevator (4023) is connected with the activated carbon regeneration system (50), and the transport vehicle b (4021) circulates between the regeneration buffer hopper (4022) and the discharging bin (33) and between the activated carbon regeneration system (50) and the feeding and storing system (10).

6. The activated carbon circulation system for off-site regeneration of desulfurization and denitrification activated carbon according to claim 4, characterized in that, The transport system (40) comprises a ton bag (4011), a first flat car (4012), a transport car a (4013), a first electric hoist (4014), a second electric hoist (4015), a second flat car (4016), a third electric hoist (4017), and a fourth electric hoist (4018); the ton bag (4011) is used to connect with the discharge bin (33) or the activated carbon regeneration system (50) to receive the activated carbon discharged from the discharge bin (33) or the activated carbon regeneration system (50); the first flat car (4012) supports the ton bag (4011) containing the activated carbon discharged from the discharge bin (33) and is used to transport it to a position below the first electric hoist (4014), and the second electric hoist (4015) is arranged above the inlet of the activated carbon regeneration system (50); the second flat car (4016) supports the ton bag (4011) containing the activated carbon discharged from the activated carbon regeneration system (50) and is used to transport it to a position below the third electric hoist (4017), and the fourth electric hoist (4018) is arranged above the inlet of the feeding and storing system (10); the transport car a (4013) circulates between the first electric hoist (4014) and the second electric hoist (4015), and between the third electric hoist (4017) and the fourth electric hoist (4018).

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