CN113441123A - Thermal desorption regeneration production line and process for saturated activated alumina pellets - Google Patents
Thermal desorption regeneration production line and process for saturated activated alumina pellets Download PDFInfo
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- CN113441123A CN113441123A CN202110768890.0A CN202110768890A CN113441123A CN 113441123 A CN113441123 A CN 113441123A CN 202110768890 A CN202110768890 A CN 202110768890A CN 113441123 A CN113441123 A CN 113441123A
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- 238000003795 desorption Methods 0.000 title claims abstract description 161
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000008188 pellet Substances 0.000 title claims abstract description 63
- 230000008929 regeneration Effects 0.000 title claims abstract description 33
- 238000011069 regeneration method Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 229920006395 saturated elastomer Polymers 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 52
- 239000000428 dust Substances 0.000 claims abstract description 52
- 239000002912 waste gas Substances 0.000 claims abstract description 50
- 239000002918 waste heat Substances 0.000 claims abstract description 49
- 238000012546 transfer Methods 0.000 claims abstract description 35
- 238000012216 screening Methods 0.000 claims abstract description 18
- 238000005303 weighing Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 12
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 100
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 21
- 239000012855 volatile organic compound Substances 0.000 claims description 21
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 230000003197 catalytic effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000004806 packaging method and process Methods 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 9
- 238000007873 sieving Methods 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 231100000331 toxic Toxicity 0.000 abstract description 3
- 230000002588 toxic effect Effects 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- SJEBAWHUJDUKQK-UHFFFAOYSA-N 2-ethylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC=C3C(=O)C2=C1 SJEBAWHUJDUKQK-UHFFFAOYSA-N 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 2
- 150000004056 anthraquinones Chemical class 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000012224 working solution Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- QOSATHPSBFQAML-UHFFFAOYSA-N hydrogen peroxide;hydrate Chemical compound O.OO QOSATHPSBFQAML-UHFFFAOYSA-N 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3433—Regenerating or reactivating of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a thermal desorption regeneration production line for saturated activated alumina pellets, which comprises a hopper, a first hoister, a primary rotary desorption kiln, a hot blast stove, a waste gas treatment system, a final rotary desorption kiln, a waste gas treatment waste heat utilization system, a rotary cooling cooler, a waste heat utilization system, a first transfer bin, a conveyor, a second transfer bin, a classification sorting inspection table, a screening machine, a second hoister, a regenerated finished product bin, a weighing packer and a ton bag conveyor, wherein the hopper is arranged on the first rotary desorption kiln; the process comprises the steps of carrying out thermal desorption regeneration treatment on saturated activated alumina pellets through a primary rotary desorption kiln and a final rotary desorption kiln, collecting dust from dust-containing gas through a waste gas treatment system, a waste gas treatment waste heat utilization system and a waste heat utilization system, carrying out effective harmless treatment on toxic and harmful gas components in the dust-containing gas, and simultaneously utilizing waste heat, thereby protecting the environment, saving and utilizing resources and energy, and reducing the production cost.
Description
Technical Field
The invention relates to the technical field of solid waste and hazardous waste disposal industrial resource recovery, in particular to a thermal desorption regeneration production line and a thermal desorption regeneration process for saturated activated alumina pellets.
Background
Hydrogen peroxide, also known as hydrogen peroxide, is commonly produced by the well-established 2-ethyl anthraquinone process (also known as the anthraquinone process). The anthraquinone process is that 2-ethyl anthraquinone and organic solvent are prepared into working solution, hydrogenation is carried out under the conditions of 3atm, 55-65 ℃ and participation of catalyst, countercurrent oxidation is carried out with air at 40-44 ℃, and hydrogen peroxide water solution products are obtained through extraction, regeneration, refining and concentration. In the post-treatment process, the active alumina pellets are required to be used for adsorbing and removing alkali and regenerating degradation products to obtain the working solution which can be recycled, and the adsorption process of the active alumina pellets cannot be reversibly regenerated. The alumina ball adsorbent must be replaced after a period of use to ensure the need for regeneration of the working fluid. Therefore, if the recycling of the alumina pellets can be realized, the cost can be greatly saved, and the alumina pellets can be regenerated through desorption reaction according to the characteristics of the alumina pellets, so that the recycling of the alumina pellets is realized. The existing equipment and process for treating and regenerating the small alumina balls are used for treating the small alumina balls, wherein the small alumina balls are subjected to desorption treatment through an activator furnace, a VOCs waste gas treatment system and a mesh belt furnace, dust is collected, and the small alumina balls are matched for refining, so that useful small alumina balls are screened out to the maximum extent, and the utilization rate of the small alumina balls is improved. In the equipment and the process for treating and regenerating the small alumina balls, equipment such as an activator furnace, a VOCs waste gas treatment system, a mesh belt furnace and the like are adopted, so that the manufacturing, production and operation costs are high.
With new content
The invention aims to solve the technical problem of providing a thermal desorption regeneration production line and a process for saturated activated alumina pellets, wherein the thermal desorption regeneration production line and the process for the saturated activated alumina pellets can be used for carrying out regeneration treatment on the alumina pellets and are low in operation energy consumption and manufacturing production cost.
In order to solve the technical problems, the invention provides a thermal desorption regeneration production line for saturated activated alumina pellets, which comprises a hopper, a first elevator, a primary rotary desorption kiln, a hot blast stove, a waste gas treatment system, a final rotary desorption kiln, a waste gas treatment waste heat utilization system, a rotary cooling cooler, a waste heat utilization system, a first transfer bin, a conveyor, a second transfer bin, a classification sorting inspection table, a screening machine, a second elevator, a regenerated finished product bin, a weighing and packaging machine and a ton bag conveyor, wherein the hopper comprises a feeding port and a discharging port, the first elevator and the second elevator are identical in structure, the primary rotary desorption kiln comprises a feeding device, a discharging device and a feeding device comprises a feeding port and an air inlet, the discharging device comprises an air outlet and a discharging port, the final rotary desorption kiln comprises a feeding device, a discharging device, The rotary cooling cooler comprises a feeding device and a discharging device, the feeding device comprises a feeding hole and an air outlet, the discharging device comprises a discharging hole and an air inlet, the feeding device comprises a feeding hole and an air outlet, and the discharging device comprises a discharging hole and an air inlet;
the discharge gate of the hopper is positioned above the feed inlet of the first hoister, the discharge gate of the first hoister is positioned above the feed inlet of the primary rotary desorption kiln, the air inlet of the feed device of the primary rotary desorption kiln is communicated with the air outlet of the hot blast stove through a pipeline, the discharge gate of the discharge device of the primary rotary desorption kiln is positioned above the feed inlet of the final rotary desorption kiln, the air outlet of the discharge device of the primary rotary desorption kiln is communicated with the waste gas treatment system through a pipeline, the air outlet of the feed device of the final rotary desorption kiln is communicated with the waste gas treatment waste heat utilization system through a pipeline, the discharge gate of the discharge device of the final rotary desorption kiln is positioned above the feed inlet of the rotary cooling cooler, the air inlet of the final rotary desorption discharge device of the hot blast stove is communicated with the air outlet through a pipeline, the air outlet of the feeding device of the rotary cooling cooler is communicated with a waste heat utilization system through a pipeline, a discharge port of a discharging device of the rotary cooling machine is positioned above the first transfer bin, the lower end of the conveyor is positioned below a discharge port of the first transfer bin, the upper end of the conveyor is positioned above the second transfer bin, the second transfer bin is positioned above one end of the sorting and inspecting table, the other end of the sorting and inspecting table is positioned above the feeding hole of the sieving machine, the discharge hole of the sieving machine is positioned above the feeding hole of the second hoisting machine, the discharge hole of the second hoister is positioned above the feed hole of the regenerated finished product bin, the weighing and packaging machine is positioned below the regenerated finished product bin, and one end of the ton package conveyor is positioned below the weighing and packaging machine;
the waste gas treatment system comprises a first dust remover, an air-cooled cooler, an adsorption box, a first fan and an exhaust funnel, wherein an air inlet of the first dust remover is connected with an air outlet of the primary rotary desorption kiln discharging device through a pipeline;
the waste gas treatment waste heat utilization system comprises a catalytic oxidation bed, a second high-temperature fan, a second heat exchanger, a second dust remover and a second fan, wherein an air inlet of the catalytic oxidation bed is communicated with an air outlet of the feeding device of the final-stage rotary desorption kiln through a pipeline, an air outlet of the catalytic oxidation bed is connected with an air inlet of the second high-temperature fan, an air outlet of the second high-temperature fan is connected with an air inlet of the second heat exchanger through a pipeline, an air outlet of the second heat exchanger is connected with an air inlet of the second dust remover through a pipeline, and an air outlet of the second dust remover is connected with an air inlet of the second fan; the air outlet of the high-temperature fan II is connected with an external waste heat utilization pipeline through a pipeline;
the waste heat utilization system comprises a third high-temperature fan, a third heat exchanger, a third dust remover and a third fan, wherein an air inlet of the third high-temperature fan is communicated with an air outlet of the feeding device of the rotary cooling cooler through a pipeline; and an air outlet of the high-temperature fan III is connected with an external waste heat utilization pipeline through a pipeline.
The quantitative conveying feeder is arranged below the hopper, a feed inlet of the quantitative conveying feeder is arranged at a discharge outlet of the hopper, and the discharge outlet of the quantitative conveying feeder is positioned above a feed inlet of the first hoister.
The conveyor is a belt type transverse rib anti-skid conveyor, and a duckbilled rubber discharge port is formed in the upper end of the belt type transverse rib anti-skid conveyor; the classification sorting inspection bench is a rubber belt conveyor with flash.
The screening machine is a rolling natural screening machine or a vibrating screening machine.
And a bin top dust collector is arranged at the top of the regenerated finished product bin.
The invention provides a process of a thermal desorption regeneration production line of saturated activated alumina pellets, which comprises the following steps:
(1) feeding saturated active small alumina balls into a hopper, wherein the small alumina balls enter a feeding port of a first hoister through a discharging port of the hopper, the small alumina balls are hoisted to a discharging port of the first hoister by the first hoister, meanwhile, high-temperature hot air of a hot blast stove enters the interior of a primary rotary desorption kiln through an air inlet of a feeding device of the primary rotary desorption kiln through a pipeline, and the high-temperature hot air of the hot blast stove enters the interior of a final rotary desorption kiln through an air inlet of a discharging device of the final rotary desorption kiln through a pipeline;
(2) the aluminum oxide pellets enter a feeding port of a feeding device of the primary rotary desorption kiln through a discharging port of a first elevator, and are subjected to heat exchange with high-temperature hot air in the primary rotary desorption kiln along with the rotation of the primary rotary desorption kiln, so that the aluminum oxide pellets are subjected to primary desorption treatment, the temperature in the primary rotary desorption kiln is not lower than 180 ℃, and the aluminum oxide pellets are pushed to a discharging device of the primary rotary desorption kiln under the action of a material guide plate in the primary rotary desorption kiln;
(3) after the small aluminum oxide balls enter the primary rotary desorption kiln discharging device, the small aluminum oxide balls enter a feeding hole of the final rotary desorption kiln feeding device through a discharging hole of the primary rotary desorption kiln discharging device;
simultaneously feeding the dust-containing and VOCs-containing high-temperature hot air waste gas subjected to heat exchange with the small aluminum oxide balls into a primary rotary desorption kiln discharging device, wherein the temperature of the dust-containing and VOCs-containing high-temperature hot air waste gas is 150-170 ℃, the dust-containing and VOCs-containing high-temperature hot air waste gas is dedusted by a deduster, then the dust-containing and VOCs-containing high-temperature hot air waste gas is fed into an air-cooled cooler for cooling, the cooled waste gas is subjected to purification treatment by an adsorption box, and the purified waste gas is discharged by a fan after reaching the standard;
(4) the alumina globules entering the feeding hole of the feeding device of the final-stage rotary desorption kiln enter the final-stage rotary desorption kiln along with the rotation of the final-stage rotary desorption kiln, exchange heat with high-temperature hot air in the final-stage rotary desorption kiln, carry out final desorption treatment on the alumina globules, lead the alumina globules to obtain thorough thermal desorption regeneration, lead the temperature in the final-stage rotary desorption kiln to be not higher than 750 ℃, push the alumina globules to the discharging device of the final-stage rotary desorption kiln under the action of a material guide plate in the final-stage rotary desorption kiln,
the high-temperature hot air waste gas containing dust and VOCs after heat exchange with the small alumina balls enters a catalytic oxidation bed through an air outlet of a feeding device of the final-stage rotary desorption kiln through a pipeline to purify the high-temperature hot air waste gas containing dust and VOCs, one part of the purified high-temperature hot air is sent to a heat exchanger II through a high-temperature fan II to carry out heat exchange, then is dedusted by a deduster II and is discharged through the fan II, and meanwhile, the other part of the high-temperature hot air is sent to an external waste heat utilization pipeline through the high-temperature fan II;
(5) after the alumina pellets enter a final-stage rotary desorption kiln discharging device, the alumina pellets enter a feeding device of a rotary cooling machine through a discharging port of the final-stage rotary desorption kiln discharging device, enter the interior of the rotary cooling machine along with the rotation of the rotary cooling machine, and exchange heat with air entering from an air inlet of the rotary cooling machine discharging device, at the moment, the temperature of the alumina pellets is reduced to normal temperature, the temperature of the air entering the machine is raised, the alumina pellets are pushed to the rotary cooling machine discharging device under the action of a material guide plate in the rotary cooling machine, meanwhile, the air with raised temperature enters the heat exchanger for heat exchange through an air outlet of the rotary cooling machine feeding device and is pumped out by a high-temperature fan III,
then, after dust removal by the dust remover III, the high-temperature gas is discharged by the fan III, and the other part of the high-temperature gas is conveyed into an external waste heat utilization pipeline;
(6) the aluminum oxide small balls enter a first transfer bin through a discharge hole of the rotary cooling machine discharging device after entering the rotary cooling machine discharging device, enter the lower end part of the conveyor through the discharge hole of the first transfer bin, and enter a second transfer bin from the upper end of the conveyor through the conveying of the conveyor;
(7) the alumina pellets in the second transfer bin enter one end of the classification sorting and checking table from a discharge port of the second transfer bin, move to the other end of the classification sorting and checking table along with the operation of the classification sorting and checking table, are checked and sorted by hands in the process, enter a screening machine along with the operation of the classification sorting and checking table along with the alumina pellets moving to the other end of the classification sorting and checking table, are sorted by the screening machine, enter a feed port of a second lifting machine, are lifted by the second lifting machine, and enter a regeneration finished product bin from a discharge port of the second lifting machine;
(8) the alumina pellets entering the regenerated finished product bin enter a weighing and packing machine through a discharge port of the regenerated finished product bin, the weighing and packing machine weighs and packs the alumina pellets into ton bags, and the ton bags are conveyed out through a ton bag conveyor and are supplied to a warehouse for storage and delivery.
In the first step, a quantitative conveying feeder is arranged below the hopper, a feed port of the quantitative conveying feeder is arranged at a discharge port of the hopper, and the discharge port of the quantitative conveying feeder is positioned above the feed port of the first elevator.
According to the thermal desorption regeneration production line and the process for the saturated activated alumina globules, the primary rotary desorption kiln and the final rotary desorption kiln are adopted, so that the thermal desorption regeneration treatment can be carried out on the saturated activated alumina globules, and compared with the prior art in which an activating machine furnace, a VOCs waste gas treatment system and a mesh belt furnace system are adopted, the production cost is low, and the operation energy consumption is low; meanwhile, the waste gas treatment system, the waste gas treatment waste heat utilization system and the waste heat utilization system are adopted, dust collection can be carried out, emission of toxic and harmful gases can be effectively prevented, and waste heat can be utilized simultaneously, so that the environment is protected, energy is saved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a thermal desorption regeneration production line for saturated activated alumina pellets.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present invention provides a thermal desorption regeneration production line for saturated activated alumina pellets, which comprises a hopper 51, a first lifting machine 2, a primary rotary desorption kiln 6, a hot blast stove 1, a waste gas treatment system, a final rotary desorption kiln 17, a waste gas treatment waste heat utilization system, a rotary cooling and cooling machine 21, a waste heat utilization system, a first transfer bin 24, a conveyor 25, a second transfer bin 27, a sorting and inspection table 28, a sieving machine 29, a second lifting machine 30, a regenerated product bin 31, a weighing and packaging machine 36 and a ton package conveyor 35. The hopper 51 comprises a feeding hole and a discharging hole, and the first elevator 2 comprises a feeding hole 49 and a discharging hole 3. The first hoisting machine 2 and the second hoisting machine 30 have the same structure. The primary rotary desorption kiln 6 comprises a feeding device 5, a discharging device 8, the feeding device 5 comprises a feeding hole 4 and an air inlet, and the discharging device 8 comprises an air outlet 9 and a discharging hole 7. The final-stage rotary desorption kiln 17 comprises a feeding device and a discharging device, the feeding device comprises a feeding hole 15 and an air outlet 16, and the discharging device comprises a discharging hole and an air inlet 19. The rotary cooling machine 21 comprises a feeding device and a discharging device, wherein the feeding device comprises a feeding hole 18 and an air outlet 20, and the discharging device comprises a discharging hole 22 and an air inlet 23.
The primary rotary desorption kiln 6, the final rotary desorption kiln 17 and the rotary cooling cooler 21 all comprise rotary conveying devices, and the inner surfaces of the rotary conveying devices all comprise material guide plates. When the rotary conveying device rotates, the guide plate pushes the alumina pellets in the rotary conveying device to move forwards. The speed of the flitch pushing the alumina pellets in the rotary conveying device to move forward depends on the rotating speed of the rotary conveying device.
The discharge gate of hopper 51 is located the top of the feed inlet 49 of first lifting machine, the discharge gate 3 of first lifting machine is located the top of the feed arrangement feed inlet 4 of elementary gyration desorption kiln 6, the feed arrangement air intake of elementary gyration desorption kiln 6 pass through the pipeline with the air outlet of hot-blast furnace 1 communicates with each other, the discharging device discharge gate 7 of elementary gyration desorption kiln 6 is located the top of the final gyration desorption kiln 17 feed arrangement's feed arrangement feed inlet 15, the discharging device air outlet 9 of elementary gyration desorption kiln pass through the pipeline with exhaust-gas treatment system communicates with each other. And an air outlet 16 of the feeding device of the final-stage rotary desorption kiln is communicated with a waste gas treatment and waste heat utilization system through a pipeline. And a discharge hole of the final-stage rotary desorption kiln discharging device is positioned above a feed hole 18 of a rotary cooling machine 21 feeding device, and an air inlet 19 of the final-stage rotary desorption kiln discharging device is communicated with an air outlet of the hot blast stove 1 through a pipeline. Of course, the hot blast stove matched with the final-stage rotary desorption kiln 17 can also adopt another independent hot blast stove, and also can share one hot blast stove 1 with the primary rotary desorption kiln 6.
And an air outlet 20 of the feeding device of the rotary cooling machine 21 is communicated with a waste heat utilization system through a pipeline. The discharging device discharge port 22 of the rotary cooling machine 21 is located above the first transfer bin 24, the lower end of the conveyor 25 is located below the discharge port of the first transfer bin 24, the upper end of the conveyor 25 is located above the second transfer bin 27, the second transfer bin 27 is located above one end of the classification and sorting inspection table 28, the other end of the classification and sorting inspection table 28 is located above the feed port of the screening machine 29, the discharge port of the screening machine 29 is located above the feed port 37 of the second lifting machine 30, the discharge port 32 of the second lifting machine 30 is located above the feed port of the regenerated finished product bin 31, the weighing and packaging machine 36 is located below the regenerated finished product bin 31, and one end of the ton package conveyor 35 is located below the weighing and packaging machine 36.
In order to optimize the structure and reduce the cost, the waste gas treatment system comprises a first dust remover 10, an air-cooled cooler 11, an adsorption box 12, a first fan 14 and an exhaust funnel 13. An air inlet of the first dust remover 10 is connected with an air outlet 9 of a discharging device 8 of the primary rotary desorption kiln 6 through a pipeline, an air outlet of the first dust remover 10 is connected with an air inlet of the air-cooled cooler 11, an air outlet of the air-cooled cooler 11 is connected with an air inlet of the adsorption box 12 through a pipeline, an air outlet of the adsorption box 12 is connected with an air inlet of the first fan 14, and an air outlet of the first fan 14 is communicated with the lower portion of the exhaust funnel 13.
In order to optimize the structure and reduce the cost, the waste gas treatment and waste heat utilization system comprises a catalytic oxidation bed 43, a second high-temperature fan 44, a second heat exchanger 46, a second dust remover 47 and a second fan 48, wherein an air inlet of the catalytic oxidation bed 43 is communicated with an air outlet 16 of the feeding device of the final-stage rotary desorption kiln 17 through a pipeline, an air outlet of the catalytic oxidation bed 43 is connected with an air inlet of the second high-temperature fan 44, an air outlet of the second high-temperature fan 44 is connected with an air inlet of the second heat exchanger 46 through a pipeline, an air outlet of the second heat exchanger 46 is connected with an air inlet of the second dust remover 47 through a pipeline, and an air outlet of the second dust remover 47 is connected with an air inlet of the second fan 48.
In order to utilize the waste heat, the air outlet of the second high-temperature fan 44 is connected with an external waste heat utilization pipeline through a pipeline. As shown in fig. 1, in this embodiment, the air outlet of the second high-temperature fan 44 is connected to an external waste heat utilization pipeline through a waste heat output pipe 45. Of course, the air outlet of the second high temperature fan 44 can also input a part of high temperature hot air into the hot blast stove 1 through the waste heat output pipe 45, so as to reduce the operation cost of the hot blast stove 1.
In order to optimize the structure and reduce the cost, the waste heat utilization system comprises a third high-temperature fan 42, a third heat exchanger 40, a third dust remover 39 and a third fan 38. An air inlet of the third high-temperature fan 42 is communicated with an air outlet 20 of the feeding device of the rotary cooling machine 21 through a pipeline, an air outlet of the third high-temperature fan 42 is communicated with an air inlet of the third heat exchanger 40 through a pipeline, an air outlet of the third heat exchanger 40 is connected with an air inlet of the third dust remover 39 through a pipeline, and an air outlet of the third dust remover 39 is connected with an air inlet of the third fan 38.
In order to utilize the waste heat, the air outlet of the high-temperature fan III 42 is connected with an external waste heat utilization pipeline through a pipeline. As shown in fig. 1, an air outlet of the high-temperature fan iii 42 is connected to an external waste heat utilization pipe through a waste heat conveying pipe 41.
Of course, the air outlet of the third high temperature fan 42 can also input a part of high temperature hot air into the hot blast stove 1 through the waste heat conveying pipe 41, so as to reduce the operation cost of the hot blast stove 1.
In order to control the discharge amount of the hopper 51, a quantitative conveying feeder 50 is arranged below the hopper 51, the feed port of the quantitative conveying feeder 50 is arranged at the discharge port of the hopper 51, and the discharge port of the quantitative conveying feeder 50 is positioned above the feed port 49 of the first elevator 2.
In order to reduce the manufacturing cost, a commercially available belt type transverse rib antiskid conveyor is adopted as the conveyor 25. In order to facilitate discharging, the upper end of the belt type transverse rib antiskid conveyor is provided with a duckbilled rubber discharging port 26.
In order to reduce the manufacturing cost, the sorting and inspecting table 28 adopts a commercially available rubber belt conveyor with flash.
In order to reduce the manufacturing cost, the screening machine 29 is a rolling natural screening machine or a vibration screening machine which is commercially available.
In order to prevent dust from being diffused, a bin top dust collector 33 is arranged at the top of the regenerated finished product bin 31.
The invention provides a process of a thermal desorption regeneration production line of saturated activated alumina pellets, which comprises the following steps:
(1) feeding saturated active small alumina balls into a hopper 51, wherein the small alumina balls enter a feeding hole 49 of a first elevator 2 through a discharging hole of the hopper 51, the first elevator 2 lifts the small alumina balls to a discharging hole 3 of the first elevator 2, meanwhile, high-temperature hot air of a hot blast stove 1 enters the interior of a primary rotary desorption kiln 6 through an air inlet of a feeding device 5 of the primary rotary desorption kiln 6 through a pipeline, and the high-temperature hot air of the hot blast stove 1 enters the interior of a final rotary desorption kiln 17 through an air inlet 19 of a discharging device of the final rotary desorption kiln 17 through a pipeline;
(2) the aluminum oxide pellets enter a feeding hole 4 of a feeding device 5 of a primary rotary desorption kiln 6 through a discharging hole 3 of a first elevator 2, the aluminum oxide pellets exchange heat with high-temperature hot air in the primary rotary desorption kiln 6 along with the rotation of the primary rotary desorption kiln 6 to carry out primary desorption treatment on the aluminum oxide pellets, the temperature in the primary rotary desorption kiln 6 is not lower than 180 ℃, and the aluminum oxide pellets are pushed to a discharging device 8 of the primary rotary desorption kiln 6 under the action of a material guide plate in the primary rotary desorption kiln 6;
(3) after the small aluminum oxide balls enter a discharging device 8 of a primary rotary desorption kiln 6, the small aluminum oxide balls enter a feeding hole 15 of a feeding device of a final rotary desorption kiln 17 through a discharging hole 7 of the discharging device 8 of the primary rotary desorption kiln 6;
simultaneously feeding the high-temperature hot air waste gas containing dust and VOCs after heat exchange with the small aluminum oxide balls into a discharging device 8 of a primary rotary desorption kiln 6, wherein the temperature of the high-temperature hot air waste gas containing dust and VOCs is 150-170 ℃, the high-temperature hot air containing dust and VOCs is dedusted by a deduster I10 and then fed into an air-cooled cooler 11 for cooling, the cooled waste gas is purified by an adsorption box 12 and is discharged by a fan I11 after reaching the standard;
(4) the alumina globules entering the feeding port 15 of the feeding device of the final-stage rotary desorption kiln 17 enter the final-stage rotary desorption kiln 17 along with the rotation of the final-stage rotary desorption kiln 17, and exchange heat with the high-temperature hot air in the final-stage rotary desorption kiln 17 to carry out final desorption treatment on the alumina globules, so that the alumina globules are completely thermally desorbed and regenerated, at the moment, the temperature in the final-stage rotary desorption kiln 17 is not higher than 750 ℃, and the alumina globules are pushed to the discharging device of the final-stage rotary desorption kiln 17 under the action of the material guide plate in the final-stage rotary desorption kiln 17,
the high-temperature hot air waste gas containing dust and VOCs after heat exchange with the small alumina balls enters a catalytic oxidation bed 43 through an air outlet 16 of a feeding device of a final-stage rotary desorption kiln 17 through a pipeline to purify the high-temperature hot air waste gas containing dust and VOCs, one part of the purified high-temperature hot air is sent to a second heat exchanger 46 through a second high-temperature fan 44 to carry out heat exchange, then is dedusted by a second deduster 47 and is discharged through a second fan 48, and meanwhile, the other part of the high-temperature hot air is conveyed to an external waste heat utilization pipeline by the second high-temperature fan 44;
(5) after entering a discharging device of a final-stage rotary desorption kiln 17, the alumina pellets enter a feeding device of a rotary cooling cooler 21 through a discharging port of the discharging device of the final-stage rotary desorption kiln 17, enter the rotary cooling cooler 21 along with the rotation of the rotary cooling cooler 21, and exchange heat with air entering from an air inlet 23 of the discharging device of the rotary cooling cooler 21, at the moment, the temperature of the alumina pellets is reduced to normal temperature, the temperature of the air entering the rotary cooling cooler 21 is increased, the alumina pellets are pushed to the discharging device of the rotary cooling cooler 21 under the action of a material guide plate inside the rotary cooling cooler 21, meanwhile, the air with the increased temperature passes through an air outlet 20 of the feeding device of the rotary cooling cooler 21, is pumped out by a high-temperature fan III 42, one part of high-temperature gas is sent into a heat exchanger III 40 for heat exchange, is discharged by a fan III 38 after being dedusted by a deduster III 39, The other part of the high-temperature gas is conveyed into an external waste heat utilization pipeline;
(6) the alumina pellets enter a discharging device of a rotary cooling machine 21 and then enter a first transfer bin 24 through a discharging port 22 of the discharging device of the rotary cooling machine 21, and then enter the lower end part of a conveyor 25 through a discharging port of the first transfer bin 24 and enter a second transfer bin 27 from the upper end of the conveyor through the conveying of the conveyor 25;
(7) the alumina pellets in the second transfer bin 27 enter one end of the sorting and inspecting table 28 from the discharge port of the second transfer bin 27, move to the other end of the sorting and inspecting table 28 along with the operation of the sorting and inspecting table 28, during the process, the alumina pellets on the sorting and inspecting table 28 are sorted by hands, the alumina pellets moving to the other end of the sorting and inspecting table 28 along with the operation of the sorting and inspecting table 28 enter the sieving machine 29, after being sorted by the sieving machine 29, the qualified alumina pellets enter the feed port 37 of the second hoisting machine 30, are hoisted by the second hoisting machine 30 and then enter the regeneration finished product bin 31 from the discharge port 32 of the second hoisting machine 30;
(8) the alumina pellets entering the regenerated finished product bin 31 enter a weighing and packing machine 36 through a discharge port of the regenerated finished product bin 31, the weighing and packing machine 36 weighs and packs the alumina pellets into ton bags 34, and the ton bags 34 are sent out through a ton bag conveyor 35 to be stored in a warehouse, stored and delivered.
In the first step, a quantitative conveying and feeding machine 50 is arranged below the hopper 51, a feeding hole of the quantitative conveying and feeding machine 50 is arranged at a discharging hole of the hopper 51, and a discharging hole of the quantitative conveying and feeding machine 50 is positioned above the feeding hole 49 of the first hoister 2.
The quantitative conveying feeder 50 is arranged below the hopper 51, the feeding hole of the quantitative conveying feeder 50 is arranged at the discharging hole of the hopper 51, and the discharging hole of the quantitative conveying feeder 50 is positioned above the feeding hole 49 of the first hoisting machine 2, so that the discharging amount of the hopper 51 can be controlled.
According to the thermal desorption regeneration production line and the process for the saturated active alumina globules, the primary rotary desorption kiln 6 and the final rotary desorption kiln 17 are adopted, so that the thermal desorption regeneration treatment can be carried out on the saturated active alumina globules, and compared with the prior art in which an activating machine furnace, a VOCs waste gas treatment system and a mesh belt furnace system are adopted, the production cost is low, and the operation energy consumption is low; meanwhile, the waste gas treatment system, the waste gas treatment waste heat utilization system and the waste heat utilization system are adopted, dust collection can be carried out, emission of toxic and harmful gas can be effectively prevented, and simultaneously, waste heat can be utilized to the maximum extent, so that the environment is protected, resources and energy are saved, and the production cost is reduced.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A thermal desorption regeneration production line for small saturated activated alumina balls comprises a hopper, a first lifting machine, a primary rotary desorption kiln, a hot blast furnace, a waste gas treatment system, a final rotary desorption kiln, a waste gas treatment waste heat utilization system, a rotary cooling machine, a waste heat utilization system, a first transfer bin, a conveyor, a second transfer bin, a classification sorting inspection table, a screening machine, a second lifting machine, a regeneration finished product bin, a weighing and packaging machine and a ton bag conveyor, wherein the hopper comprises a feeding port and a discharging port, the first lifting machine and the second lifting machine are identical in structure, the primary rotary desorption kiln comprises a feeding device, a discharging device and a discharging device, the feeding device comprises a feeding port and an air inlet, the discharging device comprises an air outlet and a discharging port, and the final rotary desorption kiln comprises a feeding device, a discharging device, Feed arrangement contains feed inlet and air outlet, discharging device and contains discharge gate and air intake, gyration cooling cooler contains feed arrangement, discharging device, feed arrangement and contains feed inlet and air outlet, discharging device and contain discharge gate and air intake, its characterized in that: the discharge gate of the hopper is positioned above the feed inlet of the first hoister, the discharge gate of the first hoister is positioned above the feed inlet of the primary rotary desorption kiln, the air inlet of the feed device of the primary rotary desorption kiln is communicated with the air outlet of the hot blast stove through a pipeline, the discharge gate of the discharge device of the primary rotary desorption kiln is positioned above the feed inlet of the final rotary desorption kiln, the air outlet of the discharge device of the primary rotary desorption kiln is communicated with the waste gas treatment system through a pipeline, the air outlet of the feed device of the final rotary desorption kiln is communicated with the waste gas treatment waste heat utilization system through a pipeline, the discharge gate of the discharge device of the final rotary desorption kiln is positioned above the feed inlet of the rotary cooling cooler, the air inlet of the final rotary desorption discharge device of the hot blast stove is communicated with the air outlet through a pipeline, the air outlet of the feeding device of the rotary cooling cooler is communicated with a waste heat utilization system through a pipeline, a discharge port of a discharging device of the rotary cooling machine is positioned above the first transfer bin, the lower end of the conveyor is positioned below a discharge port of the first transfer bin, the upper end of the conveyor is positioned above the second transfer bin, the second transfer bin is positioned above one end of the sorting and inspecting table, the other end of the sorting and inspecting table is positioned above the feeding hole of the sieving machine, the discharge hole of the sieving machine is positioned above the feeding hole of the second hoisting machine, the discharge hole of the second hoister is positioned above the feed hole of the regenerated finished product bin, the weighing and packaging machine is positioned below the regenerated finished product bin, and one end of the ton package conveyor is positioned below the weighing and packaging machine;
the waste gas treatment system comprises a first dust remover, an air-cooled cooler, an adsorption box, a first fan and an exhaust funnel, wherein an air inlet of the first dust remover is connected with an air outlet of the primary rotary desorption kiln discharging device through a pipeline;
the waste gas treatment waste heat utilization system comprises a catalytic oxidation bed, a second high-temperature fan, a second heat exchanger, a second dust remover and a second fan, wherein an air inlet of the catalytic oxidation bed is communicated with an air outlet of the feeding device of the final-stage rotary desorption kiln through a pipeline, an air outlet of the catalytic oxidation bed is connected with an air inlet of the second high-temperature fan, an air outlet of the second high-temperature fan is connected with an air inlet of the second heat exchanger through a pipeline, an air outlet of the second heat exchanger is connected with an air inlet of the second dust remover through a pipeline, and an air outlet of the second dust remover is connected with an air inlet of the second fan; the air outlet of the high-temperature fan II is connected with an external waste heat utilization pipeline through a pipeline;
the waste heat utilization system comprises a third high-temperature fan, a third heat exchanger, a third dust remover and a third fan, wherein an air inlet of the third high-temperature fan is communicated with an air outlet of the feeding device of the rotary cooling cooler through a pipeline; and an air outlet of the high-temperature fan III is connected with an external waste heat utilization pipeline through a pipeline.
2. The thermal desorption regeneration production line for the saturated activated alumina pellets as claimed in claim 1, wherein: the quantitative conveying feeder is arranged below the hopper, a feed inlet of the quantitative conveying feeder is arranged at a discharge outlet of the hopper, and the discharge outlet of the quantitative conveying feeder is positioned above a feed inlet of the first hoister.
3. The thermal desorption regeneration production line for the saturated activated alumina pellets as claimed in claim 1, wherein: the conveyor is a belt type transverse rib anti-skid conveyor, and a duckbilled rubber discharge port is formed in the upper end of the belt type transverse rib anti-skid conveyor; the classification sorting inspection bench is a rubber belt conveyor with flash.
4. The thermal desorption regeneration production line for the saturated activated alumina pellets as claimed in claim 1, wherein: the screening machine is a rolling natural screening machine or a vibrating screening machine.
5. The thermal desorption regeneration production line for the saturated activated alumina pellets as claimed in claim 1, wherein: and a bin top dust collector is arranged at the top of the regenerated finished product bin.
6. A process for a thermal desorption regeneration production line of saturated activated alumina pellets comprises the following specific steps:
(1) feeding saturated active small alumina balls into a hopper, wherein the small alumina balls enter a feeding port of a first hoister through a discharging port of the hopper, the small alumina balls are hoisted to a discharging port of the first hoister by the first hoister, meanwhile, high-temperature hot air of a hot blast stove enters the interior of a primary rotary desorption kiln through an air inlet of a feeding device of the primary rotary desorption kiln through a pipeline, and the high-temperature hot air of the hot blast stove enters the interior of a final rotary desorption kiln through an air inlet of a discharging device of the final rotary desorption kiln through a pipeline;
(2) the aluminum oxide pellets enter a feeding port of a feeding device of the primary rotary desorption kiln through a discharging port of a first elevator, and are subjected to heat exchange with high-temperature hot air in the primary rotary desorption kiln along with the rotation of the primary rotary desorption kiln, so that the aluminum oxide pellets are subjected to primary desorption treatment, the temperature in the primary rotary desorption kiln is not lower than 180 ℃, and the aluminum oxide pellets are pushed to a discharging device of the primary rotary desorption kiln under the action of a material guide plate in the primary rotary desorption kiln;
(3) after the small aluminum oxide balls enter the primary rotary desorption kiln discharging device, the small aluminum oxide balls enter a feeding hole of the final rotary desorption kiln feeding device through a discharging hole of the primary rotary desorption kiln discharging device;
simultaneously feeding the dust-containing and VOCs-containing high-temperature hot air waste gas subjected to heat exchange with the small aluminum oxide balls into a primary rotary desorption kiln discharging device, wherein the temperature of the dust-containing and VOCs-containing high-temperature hot air waste gas is 150-170 ℃, the dust-containing and VOCs-containing high-temperature hot air waste gas is dedusted by a deduster, then the dust-containing and VOCs-containing high-temperature hot air waste gas is fed into an air-cooled cooler for cooling, the cooled waste gas is subjected to purification treatment by an adsorption box, and the purified waste gas is discharged by a fan after reaching the standard;
(4) the alumina globules entering the feeding hole of the feeding device of the final-stage rotary desorption kiln enter the final-stage rotary desorption kiln along with the rotation of the final-stage rotary desorption kiln, exchange heat with high-temperature hot air in the final-stage rotary desorption kiln, carry out final desorption treatment on the alumina globules, lead the alumina globules to obtain thorough thermal desorption regeneration, lead the temperature in the final-stage rotary desorption kiln to be not higher than 750 ℃, push the alumina globules to the discharging device of the final-stage rotary desorption kiln under the action of a material guide plate in the final-stage rotary desorption kiln,
the high-temperature hot air waste gas containing dust and VOCs after heat exchange with the small alumina balls enters a catalytic oxidation bed through an air outlet of a feeding device of the final-stage rotary desorption kiln through a pipeline to purify the high-temperature hot air waste gas containing dust and VOCs, one part of the purified high-temperature hot air is sent to a heat exchanger II through a high-temperature fan II to carry out heat exchange, then is dedusted by a deduster II and is discharged through the fan II, and meanwhile, the other part of the high-temperature hot air is sent to an external waste heat utilization pipeline through the high-temperature fan II;
(5) after the alumina pellets enter a final-stage rotary desorption kiln discharging device, the alumina pellets enter a feeding device of a rotary cooling machine through a discharging port of the final-stage rotary desorption kiln discharging device, enter the interior of the rotary cooling machine along with the rotation of the rotary cooling machine, and exchange heat with air entering from an air inlet of the rotary cooling machine discharging device, at the moment, the temperature of the alumina pellets is reduced to normal temperature, the temperature of the air entering the machine is raised, the alumina pellets are pushed to the rotary cooling machine discharging device under the action of a material guide plate in the rotary cooling machine, meanwhile, the air with raised temperature enters the heat exchanger for heat exchange through an air outlet of the rotary cooling machine feeding device and is pumped out by a high-temperature fan III,
then, after dust removal by the dust remover III, the high-temperature gas is discharged by the fan III, and the other part of the high-temperature gas is conveyed into an external waste heat utilization pipeline;
(6) the aluminum oxide small balls enter a first transfer bin through a discharge hole of the rotary cooling machine discharging device after entering the rotary cooling machine discharging device, enter the lower end part of the conveyor through the discharge hole of the first transfer bin, and enter a second transfer bin from the upper end of the conveyor through the conveying of the conveyor;
(7) the alumina pellets in the second transfer bin enter one end of the classification sorting and checking table from a discharge port of the second transfer bin, move to the other end of the classification sorting and checking table along with the operation of the classification sorting and checking table, are checked and sorted by hands in the process, enter a screening machine along with the operation of the classification sorting and checking table along with the alumina pellets moving to the other end of the classification sorting and checking table, are sorted by the screening machine, enter a feed port of a second lifting machine, are lifted by the second lifting machine, and enter a regeneration finished product bin from a discharge port of the second lifting machine;
(8) the alumina pellets entering the regenerated finished product bin enter a weighing and packing machine through a discharge port of the regenerated finished product bin, the weighing and packing machine weighs and packs the alumina pellets into ton bags, and the ton bags are conveyed out through a ton bag conveyor and are supplied to a warehouse for storage and delivery.
7. The process of the thermal desorption regeneration production line of the saturated activated alumina pellets as claimed in claim 6, wherein: in the first step, a quantitative conveying feeder is arranged below the hopper, a feed port of the quantitative conveying feeder is arranged at a discharge port of the hopper, and the discharge port of the quantitative conveying feeder is positioned above the feed port of the first elevator.
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