CN111167425A - Activated carbon regeneration treatment system and treatment process thereof - Google Patents
Activated carbon regeneration treatment system and treatment process thereof Download PDFInfo
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- CN111167425A CN111167425A CN201911368370.XA CN201911368370A CN111167425A CN 111167425 A CN111167425 A CN 111167425A CN 201911368370 A CN201911368370 A CN 201911368370A CN 111167425 A CN111167425 A CN 111167425A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 249
- 230000008929 regeneration Effects 0.000 title claims abstract description 122
- 238000011069 regeneration method Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000008569 process Effects 0.000 title claims abstract description 17
- 238000010791 quenching Methods 0.000 claims abstract description 82
- 230000000171 quenching effect Effects 0.000 claims abstract description 66
- 239000002699 waste material Substances 0.000 claims abstract description 65
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 57
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002912 waste gas Substances 0.000 claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003546 flue gas Substances 0.000 claims abstract description 28
- 239000006148 magnetic separator Substances 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 15
- 239000002918 waste heat Substances 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 12
- 238000007873 sieving Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 31
- 238000012216 screening Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 14
- 230000004913 activation Effects 0.000 claims description 13
- 238000004806 packaging method and process Methods 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 10
- 238000000498 ball milling Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000003795 desorption Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000003518 caustics Substances 0.000 claims 1
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 6
- 238000001994 activation Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 239000002253 acid Substances 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
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- 229910052742 iron Inorganic materials 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000009471 action Effects 0.000 description 3
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- 238000007885 magnetic separation Methods 0.000 description 3
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- 238000000354 decomposition reaction Methods 0.000 description 2
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- 238000001914 filtration Methods 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
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- 239000011152 fibreglass Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- -1 fluorine ions Chemical class 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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Images
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
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- 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
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Food Science & Technology (AREA)
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides an active carbon regeneration treatment system and a treatment process thereof, and relates to the technical field of active carbon regeneration, wherein the treatment system comprises an active carbon regeneration device and a regeneration waste gas treatment device, and the active carbon regeneration device comprises a crusher, a sieving machine, a magnetic separator and a regeneration main machine; the regeneration waste gas treatment device comprises a high-temperature bag type dust collector, an incinerator, a waste heat boiler, a quenching assembly, a water washing tower, an alkaline washing tower and an SCR denitration reactor; the quenching component cools the high-temperature flue gas released from the waste heat boiler to be less than 80 ℃. And provides an activated carbon regeneration treatment process using the activated carbon regeneration treatment system. The invention adopts a special activated carbon regeneration device to improve the regeneration efficiency of saturated waste activated carbon, adopts a regenerated waste gas treatment device to reasonably discharge regenerated waste gas generated by activated carbon, and simultaneously, due to the existence of a quencher, the temperature of high-temperature flue gas is reduced to less than 80 ℃, so that the generation interval of dioxin is avoided, and the pollution degree to the environment is reduced.
Description
Technical Field
The invention relates to the technical field of activated carbon regeneration, in particular to an activated carbon regeneration treatment system and a treatment process thereof.
Background
The active carbon is mainly prepared from high-carbon-containing substances such as coal, charcoal, wood chips, fruit shells, petroleum coke and the like as raw materials by processing treatment such as carbonization, activation and the like. It has developed pore structure and large specific surface area, and is widely applied to the fields of national defense, space navigation, pharmaceutical and chemical industry, food, life science, environmental protection and the like.
In the sewage treatment system process, active carbon is adopted to adsorb organic impurities in the wastewater in the production processes of primary and secondary oxidation, ozone oxidation, filtration and the like, the using amount of the active carbon is very large every year, and the generated waste active carbon is 1.2 times of that of the original carbon. Therefore, enterprises need to invest a large amount of environmental protection cost to process the saturated waste activated carbon generated in the process every year, namely, the saturated waste activated carbon is activated and regenerated, so that cyclic utilization is realized, the efficiency of the traditional activation and regeneration process is low, and meanwhile, the regenerated waste gas is improperly treated to generate dioxin, so that the environment is seriously polluted.
Disclosure of Invention
One of the purposes of the present invention is to provide an activated carbon regeneration treatment system to solve the technical problems of low activation and regeneration efficiency of saturated waste activated carbon and improper treatment of regeneration waste gas, which cause dioxin generation and serious environmental pollution in the prior art.
The second purpose of the present invention is to provide an activated carbon regeneration treatment process using the activated carbon regeneration treatment system.
In order to realize one of the purposes, the invention provides the following technical scheme:
the invention provides an activated carbon regeneration treatment system, which comprises an activated carbon regeneration device and a regeneration waste gas treatment device for treating waste gas generated by the activated carbon regeneration device, wherein:
the activated carbon regeneration device comprises a crusher, a screening machine, a magnetic separator and a regeneration host, wherein the crusher, the screening machine, the magnetic separator and the regeneration host are sequentially connected and communicated;
the regeneration waste gas treatment device comprises a high-temperature bag type dust collector, an incinerator, a waste heat boiler, a quenching component, a water washing tower, an alkaline washing tower and an SCR denitration reactor;
the high-temperature bag type dust collector is connected and communicated with the regeneration host, and the high-temperature bag type dust collector, the incinerator, the waste heat boiler, the quenching component, the water scrubber, the alkaline tower and the SCR denitration reactor are sequentially connected and communicated;
the quenching assembly cools the high-temperature flue gas released from the waste heat boiler to less than 80 ℃.
Preferably, the quenching assembly comprises a quencher, a quenching tank, a buffer tank, a quenching circulating pump and a quenching heat exchanger, the quencher is mounted above the quenching tank, the quencher is connected and communicated with the waste heat boiler, the quenching tank is connected and communicated with the water washing tower, and the quencher, the quenching tank, the buffer tank, the quenching circulating pump and the quenching heat exchanger are sequentially connected and communicated end to form a circulating system.
Preferably, the quenching assembly further comprises a high-level water tank, the high-level water tank is arranged between the quenching heat exchanger and the quenching tank and is connected and communicated with the quenching heat exchanger and the quenching tank, and the high-level water tank is further connected and communicated with the quencher.
Preferably, the regenerated exhaust gas treatment device further comprises a pipeline burner, the pipeline burner is installed between the alkaline tower and the SCR denitration reactor, and the pipeline burner is connected and communicated with the alkaline tower and the SCR denitration reactor simultaneously.
Preferably, the regeneration waste gas treatment device further comprises a chimney, and the chimney is mounted at the tail end of the regeneration waste gas treatment device and is connected and communicated with the SCR denitration reactor.
Preferably, the activated carbon regeneration device further comprises an external screw conveyor, wherein the external screw conveyor is installed at a feeding port of the crusher, a discharging port of the screening machine and a discharging port of the magnetic separator.
Preferably, the active carbon regenerating unit further comprises an internal screw conveyor, the internal screw conveyor is installed inside the regenerating main machine and connected with the external screw conveyor, saturated active carbon conveyed by the external screw conveyor is transferred to the internal screw conveyor, a heating component is installed below the regenerating main machine and is heated by the saturated active carbon conveyed by the internal screw conveyor.
Preferably, a blower is arranged on the heating assembly and blows air to the heating assembly.
Preferably, the internal screw conveyors comprise two sets, located at the top inner wall and at the bottom inner wall of the regeneration main machine, the internal screw conveyors at the top inner wall being able to transfer the saturated activated carbon to the internal screw conveyors at the bottom inner wall.
Preferably, the activated carbon regeneration device still includes ball mill, humidifier and packagine machine, the ball mill the humidifier and packagine machine installs in order, the ball mill with be located bottom inner wall department inside screw conveyer intercommunication.
In order to achieve the second purpose, the invention provides the following technical scheme:
the invention provides an activated carbon regeneration treatment process, which specifically comprises the following steps:
s1: pretreating saturated waste activated carbon, conveying the saturated waste activated carbon into a storage tank of a regeneration workshop for storage, conveying the saturated waste activated carbon in the storage tank to a crusher through an external screw conveyor, crushing the agglomerated saturated waste activated carbon by the crusher, screening out solid impurities by a screening machine, and further removing magnetic particle impurities by a magnetic separator;
s2: conveying the pretreated saturated waste active carbon particles to a regeneration host machine through an external screw conveyor, supplying heat to the regeneration host machine through a heating assembly, activating and regenerating the saturated waste active carbon particles in a first temperature region at 400-850 ℃, evaporating moisture in the saturated waste active carbon particles, and promoting high-temperature cracking and desorption of waste contained in the saturated waste active carbon particles in a high-temperature state;
s3: conveying the waste activated carbon particles by a screw conveyor, and enabling the waste activated carbon particles subjected to high-temperature treatment to enter a second temperature zone for activation at 1150 ℃, so that residual wastes in micropores of the waste activated carbon particles are fully cracked, desorbed and reduced, and the original adsorption function of the saturated waste activated carbon particles is recovered;
s4: the activated carbon after ball milling is driven forwards and enters a cooling area;
s5: the active carbon after blending, packaging and ball milling is humidified and blended to meet the requirement of use humidity, and the active carbon product enters integral packaging equipment for packaging.
Preferably, the exhaust gas generated by the saturated waste activated carbon in the high-temperature state in the steps S2 and S3 sequentially passes through a high-temperature bag type dust collector, an incinerator, a waste heat boiler, a quencher, a quenching tank, a water scrubber, an alkaline tower, a pipeline burner and an SCR denitration reactor, and enters a chimney after being processed, and the quencher and the quenching tank are matched to cool the high-temperature flue gas to less than 80 ℃.
The activated carbon regeneration treatment system provided by the invention has the following technical effects:
the active carbon regeneration treatment system mainly comprises an active carbon regeneration device and a regeneration waste gas treatment device for treating waste gas generated by the active carbon regeneration device, wherein the active carbon regeneration device comprises a crusher, a screening machine, a magnetic separator and a regeneration main machine, the saturated waste active carbon is crushed by the crusher to increase the contact area with air, solid impurities in raw materials, such as iron nails, brick particles, cement blocks, plastic packaging scraps and the like mixed in the raw materials, are screened out by the screening machine, magnetic particulate matter, such as scrap iron and the like in the raw materials are further removed by the magnetic separator, the saturated waste active carbon particles after crushing, screening and magnetic separation are activated and regenerated by the regeneration main machine, the regeneration efficiency of the saturated waste active carbon is improved, and the activated waste gas is treated by the regeneration waste gas treatment device, namely sequentially passes through a high-temperature bag type dust collector, an incinerator, a high, Exhaust-heat boiler, rapid cooling subassembly, washing tower, alkaline tower and SCR denitration reactor adopt this kind of mode to make the regeneration waste gas that the active carbon produced rationally discharge, and the existence of rapid cooler simultaneously, high temperature flue gas cooling is to <80 ℃, has avoided the generation interval of dioxin, has reduced the pollution degree to the environment.
The regeneration treatment process of the activated carbon provided by the invention has the following technical effects:
this activated carbon regeneration treatment process has utilized above-mentioned activated carbon regeneration processing system, has improved the regeneration efficiency of saturated useless activated carbon, can also handle the regeneration waste gas that the activation of saturated useless activated carbon produced simultaneously, adopts the quench cooler to cool down the high temperature flue gas to below 80 ℃, has avoided the generation interval of dioxin, has reduced the pollution degree to the environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a schematic structure of an embodiment of an activated carbon regeneration treatment system provided by the present invention.
Wherein, fig. 1:
100. an activated carbon regeneration device; 101. a crusher; 102. screening machine; 103. a magnetic separator; 104. a regeneration host; 105. an external screw conveyor; 106. an internal screw conveyor; 107. a heating assembly; 108. a blower; 109. a ball mill; 110. a humidifier; 111. a packaging machine;
200. a regeneration exhaust gas treatment device; 201. a high temperature bag house; 202. an incinerator; 203. a waste heat boiler; 204. a quench assembly; 2041. a quencher; 2042. a quenching tank; 2043. a buffer tank; 2044. a quench circulating pump; 2045. a quench heat exchanger; 2046. a high-level water tank; 205. washing the tower with water; 206. an alkaline washing tower; 207. a pipeline combustor; 208. an SCR denitration reactor; 209. and (4) a chimney.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a specific embodiment of an activated carbon regeneration processing system provided by the present invention.
The activated carbon regeneration treatment system provided by the invention mainly aims to activate and regenerate saturated waste activated carbon and treat waste gas generated during activation and regeneration, and comprises an activated carbon regeneration device 100 and a regeneration waste gas treatment device 200 for treating the waste gas generated by the activated carbon regeneration device 100, as shown in fig. 1.
An activated carbon regeneration apparatus 100 for activating and regenerating saturated waste activated carbon.
And a regeneration exhaust gas treatment device 200 for treating the exhaust gas generated by the activation regeneration.
The activated carbon regeneration device 100 comprises a crusher 101, a sieving machine 102, a magnetic separator 103 and a regeneration host 104, wherein the crusher 101, the sieving machine 102, the magnetic separator 103 and the regeneration host 104 are sequentially connected and communicated.
The specific process is as follows: with saturated useless active carbon, transport and store in the regeneration workshop storage tank, saturated useless active carbon raw materials passes through the tubular delivery to preprocessing equipment in the storage tank, and breaker 101 is broken with the saturated useless active carbon of caking, forms the graininess, increases the area of contact of active carbon granule and air, and the solid impurity in the raw materials is sieved out to the sieve separator, like iron nail, fragment of brick granule, cement piece, the plastic packaging bits etc. of sneaking into in the raw materials, and magnetic particle thing impurity iron fillings etc. in the raw materials are further got rid of to magnet separator 103.
The crushed, screened and magnetically separated activated carbon enters the main regeneration machine 104, and the main regeneration machine 104 is heated to promote pyrolysis and desorption of waste contained in the saturated waste activated carbon particles at a high temperature.
The regenerated waste gas treatment device 200 comprises a high-temperature bag type dust collector 201, an incinerator 202, a waste heat boiler 203, a quenching assembly 204, a water scrubber 205, an alkali scrubber 206 and an SCR denitration reactor 208, wherein the high-temperature bag type dust collector 201 is connected and communicated with a regeneration host 104, the high-temperature bag type dust collector 201, the incinerator 202, the waste heat boiler 203, the quenching assembly 204, the water scrubber 205, the alkali scrubber 206 and the SCR denitration reactor 208 are sequentially connected and communicated, and the quenching assembly 204 cools high-temperature flue gas released from the waste heat boiler 203 to be less than 80 ℃.
In addition, the quenched flue gas enters the water scrubber 205 for multi-stage absorption, and the content of HCl and HF in the flue gas is further reduced by the absorption of the water scrubber 205. The level of the water scrubber 205 is replenished with fresh water, and the level of the quench tank 2042 is replenished by the bottom overflow of the water scrubber 205.
And the flue gas after washing enters an alkaline tower 206, HCl and HF in the flue gas are removed through a sprayed NaOH solution, and alkali liquor and water are supplemented into the tower kettle of the alkaline tower 206.
The high-temperature bag filter 201 is a ceramic filter, and the bag filter uses a membrane material as a dust removal filter material, high-temperature gas filtration belongs to microfiltration, dust is intercepted by a membrane, and gas molecules pass through an intermetallic compound porous membrane.
The main function of the incinerator 202 in the present invention is to raise the temperature of a large amount of regeneration waste gas to a designed temperature, and to supplement oxygen to the regeneration waste gas, so as to ensure the complete decomposition of organic matters in the regeneration waste gas. The incinerator 202 has the following features: the flame is stable and cannot be blown out by a large amount of regeneration gas; the regenerated gas passes through the flame, so that the initial burning efficiency is ensured; the regenerated gas and the air are uniformly mixed, so that complete secondary decomposition is ensured; the natural gas is fully combusted, the flame is stable, and no tempering exists; the operation regulation ratio is large, and the requirements of different working conditions can be met; the structural design and the material selection are reasonable, and the service life of the equipment is long; the device has the functions of automatic ignition, flame detection, automatic flameout protection and the like.
According to the activated carbon regeneration device 100 provided by the invention, the regeneration efficiency of saturated waste activated carbon is improved through crushing, screening, magnetic separation and activation regeneration, and the waste gas generated by activation is treated by the regeneration waste gas treatment device 200, so that the regeneration waste gas generated by activated carbon is reasonably discharged, and meanwhile, due to the existence of the quencher 2041, the temperature of high-temperature flue gas is reduced to be less than 80 ℃, the generation interval of dioxin is avoided, and the pollution degree to the environment is reduced.
Specifically, in order to cool the high-temperature flue gas to a temperature below 80 ℃, the quenching component 204 includes a quencher 2041, a quenching tank 2042, a buffer tank 2043, a quenching circulating pump 2044 and a quenching heat exchanger 2045, the quencher 2041 is installed above the quenching tank 2042, the quencher 2041 is connected and communicated with the exhaust-heat boiler 203, the quenching tank 2042 is connected and communicated with the washing tower 205, the quencher 2041, the quenching tank 2042, the buffer tank 2043, the quenching circulating pump 2044 and the quenching heat exchanger 2045 are sequentially connected and communicated end to form a circulating system, that is, circulating cooling water firstly enters the quenching heat exchanger 2045 and then is sprayed into the quencher 2041, the high-temperature flue gas is cooled rapidly, the cooled water after being heated enters the quenching tank 2042, the water in the quenching tank 2042 enters the buffer tank 2043, and the quenching circulating pump 2044 pumps the water in the buffer tank 2043 back to the quenching heat exchanger 2045.
In the integrated design of the quencher 2041 and the acid storage tank, in the quencher 2041, flue gas is directly contacted with cooling water which is circularly sprayed, fluorine ions and chloride ions in high-temperature flue gas are contacted with water to form dilute acid, and the dilute acid is discharged into the acid storage tank at the lower part, so that the temperature of the flue gas is rapidly reduced to less than 80 ℃.
In order to prevent acid corrosion, the quencher 2041 is made of graphite, and the quencher 2041 must bear direct impact at a high temperature of 1100-1200 ℃ without damage.
The chiller 2041 has the following features: the quencher 2041 is directly connected with the outlet at the bottom of the waste heat boiler 203, and the high-temperature flue gas and the circulating water are intensively mixed to rapidly quench and cool; the large channel design ensures no blocking risk; the upper part is provided with a water film forming structure, so that the inner wall of the whole quencher 2041 is protected by a water curtain and is not directly contacted with high-temperature flue gas, thereby improving the operation stability and prolonging the operation life; the quenching water adopts the design of uniformly distributing annular gaps, so that the dispersing effect of the quenching liquid is improved, the quenching efficiency is improved, the replacement is convenient, and the maintenance cost is reduced; the lower part of the quencher 2041 is suspended in the quenching tank 2042, and when the quench is linked in an emergency, water in the high-level water tank 2046 flows back to the quenching tank 2042 through mechanical action, submerges the bottom of the downcomer, and therefore the high-temperature flue gas is prevented from directly impacting the acid storage tank.
In addition, in order to ensure the safe operation of the equipment, the quenching assembly 204 further comprises a high-level water tank 2046, the high-level water tank 2046 is installed between the quenching heat exchanger 2045 and the quenching tank 2042 and is connected and communicated with the quenching heat exchanger 2045 and the quenching tank 2042, and the high-level water tank 2046 is also connected and communicated with the quencher 2041.
When the quenching circulating pump 2044 is stopped by accident, the water in the high-level water tank 2046 flows back to the quenching pipe by mechanical action, and submerges the quencher 2041 to form a water seal, so that the hot flue gas is sealed in the incinerator 202, and the hot flue gas is prevented from damaging the rear glass fiber reinforced plastic equipment.
In a further scheme, in order to facilitate denitration of flue gas, the regenerated exhaust gas treatment device 200 further comprises a pipeline burner 207, the pipeline burner 207 is installed between the alkaline tower 206 and the SCR denitration reactor 208, the pipeline burner 207 is connected and communicated with the alkaline tower 206 and the SCR denitration reactor 208 simultaneously, air is introduced, and fuel gas is combusted, so that the flue gas is heated, and preparation is made for further denitration.
The regeneration waste gas treatment device 200 further comprises a chimney 209, the chimney 209 is installed at the tail end of the regeneration waste gas treatment device 200, and is connected and communicated with the SCR denitration reactor 208, and the denitrated flue gas is discharged outwards through the chimney 209.
In a further scheme, the activated carbon regeneration device 100 further comprises an external screw conveyor 105, wherein the external screw conveyor 105 is installed at a feeding port of the crusher 101, a discharging port of the sieving machine 102 and a discharging port of the magnetic separator 103.
The specific process is as follows: saturated useless active carbon granule is carried to breaker 101 through outside screw conveyer 105, and screening machine 102 is located breaker 101 under, drops to screening machine 102 through the action of gravity in, and screening machine 102 is carrying to magnetic separator 103 in through outside screw conveyer 105, and the saturated useless active carbon granule after the magnetic separation is carried to regeneration host computer 104 through outside screw conveyer 105.
In order to further convey the saturated waste activated carbon particles, the activated carbon regeneration device 100 further comprises an internal screw conveyor 106, the internal screw conveyor 106 is installed inside the regeneration host 104 and connected with an external screw conveyor 105, the saturated activated carbon conveyed by the external screw conveyor 105 is transferred to the internal screw conveyor 106, a heating component 107 is installed below the regeneration host 104, and the heating component 107 heats the saturated activated carbon conveyed by the internal screw conveyor 106, so that the waste contained in the saturated waste activated carbon particles in a high-temperature state is subjected to high-temperature cracking and desorption.
The heating assembly 107 is provided with the blower 108, and the blower 108 blows air to the heating assembly 107, so that the combustion efficiency of the heating assembly 107 is improved.
In order to further provide the activation regeneration efficiency of the saturated waste activated carbon particles, the internal screw conveyors 106 comprise two groups and are simultaneously positioned at the top inner wall and the bottom inner wall of the regeneration main machine 104, the internal screw conveyor 106 positioned at the top inner wall can transfer the saturated activated carbon to the internal screw conveyor 106 positioned at the bottom inner wall, namely, the waste contained in the internal part is subjected to high-temperature cracking and desorption while the saturated waste activated carbon particles are conveyed by the internal screw conveyor 106, so that the purpose of activation regeneration is achieved.
The activated carbon regeneration device 100 further comprises a ball mill 109, a humidifier 110 and a packing machine 111, wherein the ball mill 109, the humidifier 110 and the packing machine 111 are sequentially installed, the ball mill 109 is communicated with the internal screw conveyor 106 at the inner wall of the bottom, namely, activated and regenerated activated carbon is subjected to ball milling, humidification and packing for reuse.
The activated carbon regeneration treatment process specifically comprises the following steps:
(1): pretreating saturated waste activated carbon, conveying the saturated waste activated carbon into a storage tank of a regeneration workshop for storage, conveying the saturated waste activated carbon in the storage tank to a crusher 101 through an external screw conveyor 105, crushing agglomerated saturated waste activated carbon by the crusher 101, screening out solid impurities by a screening machine, and further removing magnetic particulate matter impurities by a magnetic separator 103;
(2): the saturated waste active carbon particles obtained through pretreatment are conveyed to a regeneration host 104 through an external screw conveyor 105, the regeneration host 104 supplies heat through a heating assembly 107, the saturated waste active carbon particles are activated and regenerated in a first temperature region at 400-850 ℃, moisture in the saturated waste active carbon particles is evaporated, and waste contained in the saturated waste active carbon particles in a high-temperature state is promoted to be cracked and desorbed at a high temperature;
(3): conveying the waste activated carbon particles by a screw conveyor, and enabling the waste activated carbon particles subjected to high-temperature treatment to enter a second temperature zone for activation at 1150 ℃, so that residual wastes in micropores of the waste activated carbon particles are fully cracked, desorbed and reduced, and the original adsorption function of the saturated waste activated carbon particles is recovered;
(4): the activated carbon after ball milling is driven forwards and enters a cooling area;
(5): the active carbon after blending, packaging and ball milling is humidified and blended to meet the requirement of use humidity, and the active carbon product enters integral packaging equipment for packaging.
The exhaust gas generated by the saturated waste activated carbon in the above (2) and (3) in a high temperature state sequentially passes through the high temperature bag type dust collector 201, the incinerator 202, the exhaust heat boiler 203, the quencher 2041, the quenching tank 2042, the water scrubber 205, the alkaline scrubber 206, the pipeline burner 207 and the SCR denitration reactor 208, and enters the chimney 209 after being processed, and the quenching tank 2042 is matched with the quenching tank 2041 to cool the high temperature flue gas to less than 80 ℃.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. An activated carbon regeneration treatment system comprising an activated carbon regeneration device (100) and a regenerated exhaust gas treatment device (200) for treating an exhaust gas generated by the activated carbon regeneration device (100), wherein:
the activated carbon regeneration device (100) comprises a crusher (101), a screening machine (102), a magnetic separator (103) and a regeneration main machine (104), wherein the crusher (101), the screening machine (102), the magnetic separator (103) and the regeneration main machine (104) are sequentially connected and communicated;
the regeneration waste gas treatment device (200) comprises a high-temperature bag type dust collector (201), an incinerator (202), a waste heat boiler (203), a quenching assembly (204), a water washing tower (205), an alkali washing tower (206) and an SCR denitration reactor (208);
the high-temperature bag type dust collector (201) is connected and communicated with the regeneration host machine (104), and the high-temperature bag type dust collector (201), the incinerator (202), the waste heat boiler (203), the quenching assembly (204), the water scrubber (205), the alkaline tower (206) and the SCR denitration reactor (208) are sequentially connected and communicated;
the quenching assembly (204) cools the high temperature flue gas released from the waste heat boiler (203) to <80 ℃.
2. The activated carbon regeneration treatment system of claim 1, wherein the quenching assembly (204) comprises a quencher (2041), a quenching tank (2042), a buffer tank (2043), a quenching circulating pump (2044) and a quenching heat exchanger (2045), the quencher (2041) is installed above the quenching tank (2042), the quencher (2041) is connected and communicated with the exhaust-heat boiler (203), the quenching tank (2042) is connected and communicated with the water scrubber (205), and the quencher (2041), the quenching tank (2042), the buffer tank (2043), the quenching circulating pump (2044) and the quenching heat exchanger (2045) are sequentially connected and communicated end to form a circulating system.
3. The system of claim 2, wherein the quench assembly (204) further comprises a head tank (2046), the head tank (2046) being mounted between the quench heat exchanger (2045) and the quench tank (2042) and being connected to and in communication with the quench heat exchanger (2045) and the quench tank (2042), the head tank (2046) being further connected to and in communication with the quench cooler (2041).
4. The activated carbon regeneration treatment system according to any one of claims 1 to 3, wherein the activated carbon regeneration device (100) further comprises an external screw conveyor (105), and the external screw conveyor (105) is installed at a feed port of the crusher (101), a discharge port of the sieving machine (102), and a discharge port of the magnetic separator (103).
5. The activated carbon regeneration treatment system according to claim 4, wherein the activated carbon regeneration device (100) further comprises an internal screw conveyor (106), the internal screw conveyor (106) is installed inside the regeneration main machine (104) and connected with the external screw conveyor (105), the saturated waste activated carbon conveyed by the external screw conveyor (105) is transferred to the internal screw conveyor (106), a heating assembly (107) is installed below the regeneration main machine (104), and the heating assembly (107) heats the saturated waste activated carbon conveyed by the internal screw conveyor (106).
6. The activated carbon regeneration treatment system according to claim 5, wherein a blower (108) is provided on the heating assembly (107), and the blower (108) blows air to the heating assembly (107).
7. The activated carbon regeneration treatment system of claim 5, wherein the internal screw conveyors (106) comprise two sets, located at both a top inner wall and a bottom inner wall of the regeneration main machine (104), the internal screw conveyors (106) located at the top inner wall being capable of transferring saturated spent activated carbon to the internal screw conveyors (106) located at the bottom inner wall.
8. The activated carbon regeneration treatment process is characterized by comprising the following steps:
s1: the method comprises the following steps of pretreating saturated waste activated carbon, conveying the saturated waste activated carbon into a storage tank of a regeneration workshop for storage, conveying the saturated waste activated carbon in the storage tank to a crusher (101) through an external screw conveyor (105), crushing agglomerated saturated waste activated carbon by the crusher (101), screening out solid impurities by a screening machine, and further removing magnetic particulate impurities by a magnetic separator (103);
s2: the method comprises the following steps that saturated waste activated carbon particles obtained through pretreatment are conveyed to a regeneration main machine (104) through an external screw conveyor (105), the regeneration main machine (104) supplies heat through a heating assembly (107), the saturated waste activated carbon particles are activated and regenerated in a first temperature region under the working condition of temperature of 400-850 ℃, moisture in the saturated waste activated carbon particles is evaporated, and waste contained in the saturated waste activated carbon particles in a high-temperature state is promoted to be subjected to high-temperature cracking and desorption;
s3: conveying the waste activated carbon particles by a screw conveyor, and enabling the waste activated carbon particles subjected to high-temperature treatment to enter a second temperature zone for activation at 1150 ℃, so that residual wastes in micropores of the waste activated carbon particles are fully cracked, desorbed and reduced, and the original adsorption function of the saturated waste activated carbon particles is recovered;
s4: the activated carbon after ball milling is driven forwards and enters a cooling area;
s5: the active carbon after blending, packaging and ball milling is humidified and blended to meet the requirement of use humidity, and the active carbon product enters integral packaging equipment for packaging.
9. The activated carbon regeneration treatment process according to claim 8, wherein the exhaust gas generated by the saturated spent activated carbon in the high temperature state in steps S2 and S3 sequentially passes through the high temperature bag house (201), the incinerator (202), the exhaust heat boiler (203), the quencher (2041), the quench tank (2042), the water scrubber (205), the caustic tower (206), the pipeline burner (207) and the SCR denitration reactor (208), and enters the chimney (209) after being treated, and the quench tank (2041) and the quench tank (2042) are matched to cool the high temperature flue gas to <80 ℃.
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| CN111686706A (en) * | 2020-07-17 | 2020-09-22 | 宁夏宜鑫环保科技有限公司 | Negative pressure closed type energy-saving activation regeneration system for dangerous waste carbon |
| CN111729490A (en) * | 2020-07-01 | 2020-10-02 | 中国计量大学 | Waste gas treatment process in activated carbon regeneration process |
| CN112090215A (en) * | 2020-09-17 | 2020-12-18 | 郑州格矽科技发展有限公司 | Device and method for treating adsorbate on surface of ultrafine powder |
| CN112675826A (en) * | 2021-01-06 | 2021-04-20 | 溧阳中材环保有限公司 | Activated carbon regeneration system with cement kiln and regeneration equipment |
| CN113310052A (en) * | 2021-05-24 | 2021-08-27 | 江苏秋林特能装备股份有限公司 | Comprehensive pulping preparation system for solid waste with calorific value |
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| CN117101634A (en) * | 2023-09-21 | 2023-11-24 | 宁夏启玉生物新材料有限公司 | On-line regeneration equipment and process of decoloration adsorption activated carbon for lactic acid production |
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