CN109264717B - Clean production process and system for activated carbon and coke - Google Patents
Clean production process and system for activated carbon and coke Download PDFInfo
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- CN109264717B CN109264717B CN201811477598.8A CN201811477598A CN109264717B CN 109264717 B CN109264717 B CN 109264717B CN 201811477598 A CN201811477598 A CN 201811477598A CN 109264717 B CN109264717 B CN 109264717B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000000571 coke Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000007789 gas Substances 0.000 claims abstract description 81
- 239000000428 dust Substances 0.000 claims abstract description 38
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 36
- 230000023556 desulfurization Effects 0.000 claims abstract description 36
- 238000000746 purification Methods 0.000 claims abstract description 30
- 238000007539 photo-oxidation reaction Methods 0.000 claims abstract description 18
- 239000002912 waste gas Substances 0.000 claims abstract description 16
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 15
- 239000002351 wastewater Substances 0.000 claims abstract description 15
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 230000004913 activation Effects 0.000 claims description 85
- 238000005406 washing Methods 0.000 claims description 55
- 238000003763 carbonization Methods 0.000 claims description 47
- 238000004806 packaging method and process Methods 0.000 claims description 42
- 239000003245 coal Substances 0.000 claims description 40
- 239000011269 tar Substances 0.000 claims description 36
- 238000002156 mixing Methods 0.000 claims description 35
- 239000002918 waste heat Substances 0.000 claims description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 29
- 239000003546 flue gas Substances 0.000 claims description 28
- 238000005554 pickling Methods 0.000 claims description 27
- 238000012216 screening Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 22
- 230000001172 regenerating effect Effects 0.000 claims description 20
- 238000002791 soaking Methods 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 15
- 239000011280 coal tar Substances 0.000 claims description 14
- 230000003009 desulfurizing effect Effects 0.000 claims description 14
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 230000001699 photocatalysis Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 230000008929 regeneration Effects 0.000 claims description 9
- 238000011069 regeneration method Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 206010022000 influenza Diseases 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000005539 carbonized material Substances 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 238000010000 carbonizing Methods 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 239000012257 stirred material Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims 1
- 231100000331 toxic Toxicity 0.000 abstract description 7
- 230000002588 toxic effect Effects 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 description 13
- 238000001816 cooling Methods 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101000622137 Homo sapiens P-selectin Proteins 0.000 description 1
- 102100023472 P-selectin Human genes 0.000 description 1
- 101000873420 Simian virus 40 SV40 early leader protein Proteins 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/39—Apparatus for the preparation thereof
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/36—Reactivation or regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention relates to a clean production process and a clean production system for activated carbon and coke. According to the clean production process and system of the activated carbon and the coke, according to the different properties of wastewater, toxic and harmful gas and dust generated in different working sections in the production process, the wastewater, the waste gas and the dust in each working section are collected and treated in a classified manner, and the nanometer photo-oxidation dynamic and static combination purification technology, the selective non-catalytic reduction desulfurization and denitrification technology and the water treatment equipment are adopted for purification treatment, and meanwhile, the collected and treated waste is returned to the production link for use, so that the environment is protected and the resources are saved.
Description
Technical Field
The invention relates to a production process of active carbon and coke, in particular to a clean production process of active carbon and coke; the invention also relates to a clean production system of the activated carbon and the coke.
Background
The activated carbon (coke) product can remove pollutants in water, purify air, recycle waste gas and the like, is widely applied to various aspects of industrial and agricultural production, and can produce dust, smoke, waste water and toxic malodorous gas (containing VOC) in the production and processing process S ) And the like, a large amount of scattering and unorganized emission, and serious problems of resource waste and environmental pollution are generated.
For example, in the prior art, the treatment of carbonized and activated flue gas by activated carbon enterprises generally adopts an incineration mode, the incineration mode only utilizes waste heat energy of flue gas, no desulfurization and denitrification measures are generally adopted, and a large amount of SO in the flue gas 2 、NO x Harmful substances such as smoke dust, heavy metals and the like are directly emptied without treatment. For desulfurization, denitrification and toxic malodorous gas (containing VOC) of flue gas in the production process of activated carbon S ) The purification technology of (2) has no forming technology in enterprises.
Disclosure of Invention
The invention aims to provide a clean production process and a clean production system for activated carbon and coke, which can treat dust, waste water and waste gas generated in the production process in a classified manner, and return collected and treated waste to a production link for use, thereby protecting the environment and saving resources.
The invention relates to a clean production process of activated carbon and coke, which comprises the following steps: 1) Pulverizing raw material coal: making raw coal into coal powder by using a pulverizer; 2) Stirring: mixing pulverized coal, tar and water in proportion, and stirring in a kneader; 3) Granulating: delivering the stirred materials into a granulator for granulation; 4) Drying or airing: granulating and then feeding into a dryer; or granulating and then airing; 5) Carbonizing: the dried or aired dried materials are sent into a carbonization furnace for carbonization; 6) Pre-activation: delivering the carbonized material into pre-activation equipment for pre-activation; 7) And (3) secondary activation: the preactivated material is sent into an activation furnace for secondary activation; 8) Deep activation and uniform mixing: delivering the activated material subjected to secondary activation into a uniform mixing device for deep activation and uniform mixing; 9) Screening and packaging: the activated materials after deep activation and uniform mixing are sent to a screening and packaging machine for screening and packaging; wherein, a gas collecting hood is respectively arranged at the discharge port of the kneader, the discharge port of the granulator, the discharge port of the dryer and the discharge port of the carbonization furnace; the dust and VOCS collected by the gas collecting hood are sent to a water and oil remover for filtration through a draught fan, then a part of the dust and VOCS are sent to the burner of the carbonization furnace for combustion promotion through valve adjustment, a part of the dust and VOCS are sent to the incinerator for combustion, and the rest of the dust and VOCS are sent to the purification equipment for purification treatment, and the purified gas is exhausted through a discharge port; an incinerator is arranged behind the carbonization furnace, a waste heat boiler is arranged behind the incinerator, a proper amount of NH3.H2O is sprayed into the incinerator by adopting selective non-catalytic reduction desulfurization and denitrification equipment for denitration, a parallel desulfurization tower is arranged behind the waste heat boiler, active coke is arranged in the desulfurization tower for desulfurization, and the purified flue gas is discharged through a discharge port to reach the standard; the tail gas generated by the preactivation equipment is purified by the purification equipment and then discharged from the discharge port 15 after reaching the standard.
The invention relates to a production process of active carbon and coke, wherein before the step 2), a coal tar storage tank sends tar into a tar metering tank through a tar pump, and a pulverizer prepares raw coal into pulverized coal and sends the pulverized coal into a pulverized coal metering tank.
The invention relates to a production process of active carbon and coke, wherein a nano photo-oxidation dynamic-static combined purifying bin is arranged outside a coal tar storage tank and a tar pump and used for purifying VOCS, gas in the nano photo-oxidation dynamic-static combined purifying bin is sent to a water and oil remover for filtration through a draught fan, then a part of the gas is sent to a carbonization furnace end for combustion promotion through valve adjustment, a part of the gas is sent to an incinerator for combustion, and the rest of the gas is sent to purifying equipment for purifying treatment, and the purified gas is exhausted through an exhaust port.
The invention relates to a production process of activated carbon and coke, wherein the activated material subjected to deep activation and uniform mixing in the step 8) is sent to acid washing equipment for acid washing and water washing equipment for water washing, then sent to drying equipment for drying, and finally sent to packaging equipment for packaging.
The invention relates to a production process of active carbon and coke, wherein dust dissipated by a pulverizer and a coal dust bin is collected by a dust remover, and the collected dust is sent to a kneader for production.
The invention relates to a production process of activated carbon and coke, wherein part of flue gas after denitration is led out from a flue of an activation furnace is sent into preactivation equipment for preactivation, and tail gas is purified by purification equipment and then discharged from a discharge port to reach the standard.
The invention relates to a production process of active carbon and coke, wherein in the step 7), an activation furnace is a Sieve activation furnace, denitration is carried out by adopting a selective non-catalytic reduction desulfurization and denitration technology, a proper amount of NH3.H2O is alternately sprayed into upper connecting flues of left and right heat storage chambers of the activation furnace along with switching time, the flue gas after denitration passes through a waste heat boiler and an induced draft fan, enters a water-cooling tower for water recycling, the recycled water is sent to a water treatment center for treatment, gas is discharged after reaching standards, and the water treated by the water treatment center is used by the waste heat boiler, acid washing equipment and water washing equipment, and wastewater generated by the acid washing equipment and the water washing equipment is returned to the water treatment center for treatment.
The invention relates to a production process of active carbon and coke, wherein, the active coke which is absorbed and saturated in a desulfurizing tower is sent to a soaking and washing device for pretreatment, dilute sulfuric acid generated by the soaking and washing device is sent to a pickling device for pickling the active carbon, the active coke after soaking and washing is sent to a regenerating furnace for regeneration, a heat source of the regenerating furnace adopts flue gas after denitration of an activating furnace, high-temperature tail gas generated by regeneration of the active coke is sent to the pickling device, heat source and partial sulfuric acid are provided for the pickling device, and the active coke regenerated by the regenerating furnace is sent to a screening and packaging machine for packaging and returned to the desulfurizing tower for utilization.
The invention relates to a clean production system of active carbon and coke, which comprises a coal tar storage tank, a tar metering tank, a coal powder metering tank, a pulverizer, a kneader, a granulator, a dryer, a carbonization furnace, pre-activation equipment, an activation furnace, deep activation uniform mixing equipment, a screening packaging machine, a nano photo-oxidation dynamic and static combined purification bin, a gas collecting hood, a dust remover, an incinerator, a first waste heat boiler, a second waste heat boiler, a parallel desulfurization tower, selective non-catalytic reduction equipment, photo-catalytic oxidation purification equipment, screening packaging equipment and a water treatment center, wherein an outlet of the coal tar storage tank is connected with an inlet of the tar metering tank through a tar pump, a discharge port of the pulverizer is connected with a feed port of the coal powder metering tank, a discharge port of the tar metering tank is respectively connected with a feed port of the kneader, and the pulverizer, and the coal powder metering tank and the kneader are respectively provided with the dust remover, the outlet of the dust remover is connected with the feed inlet of the kneader, the discharge outlet of the kneader is connected with the feed inlet of the granulator, the discharge outlet of the granulator is connected with the feed inlet of the dryer, the discharge outlet of the carbonization furnace is connected with the feed inlet of the preactivation device, the discharge outlet of the preactivation device is connected with the feed inlet of the activation furnace, the discharge outlet of the activation furnace is connected with the feed inlet of the deep activation uniform mixing device, the discharge outlet of the deep activation uniform mixing device is connected with the feed inlet of the sieving packaging machine, the discharge outlet of the deep activation uniform mixing device is connected with the feed inlet of the pickling device, the discharge outlet of the pickling device is connected with the feed inlet of the washing device, the discharge outlet of the washing device is connected with the feed inlet of the drying device, the discharge outlet of the drying device is connected with the packaging device, the tail gas outlet of the carbonization furnace is connected with the gas inlet of the incinerator, the hot air outlet of the incinerator is connected with a first waste heat boiler, the air outlet of the first waste heat boiler is connected with the air inlet of the parallel desulfurizing tower, the air outlet of the parallel desulfurizing tower is connected with the exhaust port, the flue gas outlet of the activating furnace is connected with the air inlet of the preactivation equipment and the air inlet of the second waste heat boiler respectively, and the air outlet of the preactivation equipment is connected with the air inlet of the preactivation equipmentThe outlet of the kneader, the granulator, the dryer and the discharge port of the carbonization furnace are respectively provided with a gas collecting hood, the outlet of the kneader, the granulator, the dryer and the gas outlet of the carbonization furnace are respectively communicated with the gas collecting hood, the gas outlet of the nano photooxidation dynamic and static combined purification bin and the gas outlet of the gas collecting hood are respectively connected with a dehydrator, the outlet of the dehydrator is respectively connected with the furnace end of the carbonization furnace, the gas inlet of the incineration furnace and the inlet of the photocatalytic oxidation purification device, the outlet of the photocatalytic oxidation purification device is connected with a discharge port, and the outlet of the selective non-catalytic reduction denitration device is used for spraying a proper amount of NH into the incineration furnace 3 .H 2 O is used for denitration and is also used for alternately spraying a proper amount of NH into upper connecting flues of left and right regenerators of the activation furnace along with switching time 3 .H 2 O。
The invention discloses a clean production system of activated carbon and coke, which further comprises a regenerating furnace, wherein a coke discharging port of a desulfurizing tower is connected with a feed port of soaking and washing equipment, a discharge port of the soaking and washing equipment is connected with the feed port of the regenerating furnace, and a discharge port of the regenerating furnace is connected with the feed port of screening and packaging equipment.
The technology adopts a selective non-catalytic reduction desulfurization and denitrification technology to remove SO in the flue gas X 、NO X And various heavy metal pollutants, the toxic and harmful gases and dust discharged by the unorganized way are collected in a classification way by utilizing the nano photooxidation dynamic and static combined purification bin, the toxic and harmful gases and dust are conveyed to special treatment equipment for purification treatment, the wastewater is purified by utilizing the water treatment purification equipment, and the collected and treated waste is returned to a production link for addingSo as to be utilized, not only protect the environment, but also save the resources.
The invention is further described below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a clean production system of activated carbon and coke, and is also a schematic view of a process flow.
Detailed Description
As shown in figure 1, the clean production system of active carbon and coke comprises a coal tar storage tank 1, a tar metering tank 2, a coal powder metering tank 3, a pulverizer 4, a kneader 5, a granulator 6, a dryer 7, a carbonization furnace 10, a preactivating device 19, an activation furnace 20, a deep activation uniform mixing device 24, a screening packaging machine 32, a nano photo-oxidation dynamic and static combined purification bin 34, a gas collecting hood, a dust remover 8, an incinerator 11, a first waste heat boiler 12, a second waste heat boiler 21, a parallel desulfurization tower 13, a selective non-catalytic reduction device 33, a photocatalytic oxidation purification device 18, a screening packaging device 31, a water treatment center 25 and a regeneration furnace 30, wherein an outlet of the coal tar storage tank 1 is connected with an inlet of the tar metering tank 2 through a tar pump, a discharge port of the pulverizer 4 is connected with a feed port of the pulverized coal metering tank 3, a discharge port of the tar metering tank 2 and a discharge port of the coal metering tank 3 are respectively connected with a feed port of the kneader 5, the pulverizer 4 and the carbonization metering tank 3 and the carbonization furnace 5 are respectively provided with dust collectors 8, an outlet of the dust collectors 8 are respectively connected with a feed port of the kneader 5, a feed port of the pulverizer 6 and a feed port of the pulverizer 5 are connected with a feed port of the pulverizer 7, a feed port of the pulverizer 6 and a feed port of the pulverizer 7 is connected with a feed port of the pulverizer 7, a feed port of the pulverizer 7 is connected with a feed port of the dryer 27, a feed port of the pulverizer 7 is connected with a feed port 7 and a feed port of the pulverizer 7, a feed port of the pulverizer 7 is connected with a feed port of the pulverizer 7, a feed port 7 is connected with a feed port of the kiln 27 is connected with a feed port and a feed port 7 is connected with a feed port 7, a feed device is connected with a feed device 27. The discharge port of the water washing device 28 is connected with the feed port of the drying device 29, the discharge port of the drying device 29 is connected with the packaging device 31, and the tail gas of the carbonization furnace 10The outlet is connected with the air inlet of the incinerator 11, the hot air outlet of the incinerator 11 is connected with the first waste heat boiler 12, the air outlet of the first waste heat boiler 12 is connected with the air inlet of the parallel desulfurizing tower 13, the air outlet of the parallel desulfurizing tower 13 is connected with the discharge port 15, the flue gas outlet of the activating furnace 20 is respectively connected with the air inlet of the preactivating device 19 and the air inlet of the second waste heat boiler 21, the air outlet of the preactivating device 19 is connected with the inlet of the photocatalytic oxidation purifying device 18, the air outlet of the second waste heat boiler 21 is connected with the flue gas inlet of the water cooling tower 23 through the induced draft fan 22, the outlet of the water cooling tower 23 is connected with the water treatment center 25, the water outlet of the water treatment center 25 is respectively connected with the water inlet of the pickling device 27, the water inlet of the washing device 28 and the water inlet of the soaking and washing device 26, water treated by the water treatment center 25 is supplied to the first waste heat boiler 12 and the second waste heat boiler 21, the waste water outlet of the pickling device 27 and the waste water outlet of the washing device 28 are respectively connected with the water inlet of the water treatment center 25, the nano photo-oxidation dynamic and static combined purifying bin 34 is arranged outside the coal tar storage tank 1 and the tar pump, the discharge port of the kneader 5, the discharge port of the granulator 6, the discharge port of the dryer 7 and the discharge port of the carbonization furnace 10 are respectively provided with a gas collecting cover, the gas outlets of the kneader 5, the granulator 6, the dryer 7 and the carbonization furnace 10 are respectively communicated with the gas collecting cover, the gas outlets of the nano photo-oxidation dynamic and static combined purifying bin 34 and the gas outlets of the gas collecting covers are respectively connected with the water and oil removing device 16, the outlet of the water and oil removing device 16 is respectively connected with the furnace end 9 of the carbonization furnace 10, the gas inlet of the incinerator 11 and the inlet of the photo-catalytic oxidation purifying device 18, the outlet of the photo-catalytic oxidation purifying device 18 is connected with the discharge port 15, the selective non-catalytic reduction desulfurization and denitrification device 33 is used for spraying a proper amount of NH into the incinerator 11 3 .H 2 O is used for denitration and is also used for alternately spraying a proper amount of NH into upper connecting flues of left and right regenerators of the activation furnace 20 along with switching time 3 .H 2 O。
In the clean production system of the active carbon and the coke, a coke discharging port of the desulfurizing tower 13 is connected with a feeding port of the soaking and washing equipment 26, a discharging port of the soaking and washing equipment 26 is connected with a feeding port of the regenerating furnace 30, and a discharging port of the regenerating furnace 30 is connected with a feeding port of the sieving and packaging equipment 31. As shown in fig. 1, in the production process, a coal tar storage tank 1 is sent into a tar metering tank 2 through a tar pump, a pulverizer is used for pulverizing raw material coal and then sending the pulverized coal into a pulverized coal metering tank 3, materials such as pulverized coal, tar, water and the like are prepared according to a certain proportion, sent into a kneader 5 for stirring, then sent into a granulator 6 for granulating, sent into a dryer (or airing) 7 through a belt conveyor after granulating, sent into a carbonization furnace 10 for carbonization, sent into a preactivation device 19 for preactivation, then sent into an activation furnace 20 for activation, sent into a device 24 for deep activation and uniform mixing, and sent into a screening package 32 for finished product package after uniform mixing. Or the activated materials are sent to the pickling device 27 and the washing device 28 for further processing, then sent to the drying device 29 for drying, and finally sent to the packaging device 31 for packaging.
The invention relates to a clean production process of activated carbon and coke, which comprises the following steps: 1) Pulverizing raw material coal: making raw coal into coal powder by using a pulverizer; 2) Stirring: mixing pulverized coal, tar and water in proportion, and stirring in a kneader; 3) Granulating: delivering the stirred materials into a granulator for granulation; 4) Drying or airing: granulating and then feeding into a dryer; or granulating and then airing; 5) Carbonizing: the dried or aired dried materials are sent into a carbonization furnace for carbonization; 6) Pre-activation: delivering the carbonized material into pre-activation equipment for pre-activation; 7) And (3) secondary activation: the preactivated material is sent into an activation furnace for secondary activation; 8) Deep activation and uniform mixing: delivering the activated material subjected to secondary activation into a uniform mixing device for deep activation and uniform mixing; 9) Screening and packaging: the activated materials after deep activation and uniform mixing are sent to a screening and packaging machine for screening and packaging; or, the activated materials after deep activation and uniform mixing are sent to acid washing equipment for acid washing and water washing equipment for water washing, then sent to drying equipment for drying, and finally sent to packaging equipment for packaging; wherein, a gas collecting hood is respectively arranged at the discharge port of the kneader, the discharge port of the granulator, the discharge port of the dryer and the discharge port of the carbonization furnace; dust and VOC that gas collecting hood collected S Sending the waste gas into a water and oil remover for filtration through a draught fan, then adjusting a part of the waste gas into a furnace end of a carbonization furnace through a valve to promote combustion, sending a part of the waste gas into an incinerator for combustion, and sending the rest waste gas into purifying equipment for purifying treatment, wherein the purified gas is exhausted through an exhaust port; the carbonization furnace is arranged behindPlacing the waste heat boiler in an incinerator, spraying a proper amount of NH3.H2O into the incinerator by adopting selective non-catalytic reduction desulfurization and denitration equipment for denitration, installing a parallel desulfurization tower after the waste heat boiler, placing active coke in the desulfurization tower for desulfurization, and discharging purified flue gas reaching the standard through a discharge port; the tail gas generated by the preactivation equipment is purified by the purification equipment and then discharged from the discharge port 15 after reaching the standard.
Before the step 2), the tar is sent into a tar metering tank by a tar pump from a coal tar storage tank, and is sent into a coal dust metering tank after raw coal is made into coal dust by a pulverizer.
The coal tar storage tank and the tar pump are externally provided with a nano photo-oxidation dynamic-static combined purifying bin which is used for purifying VOC S The gas in the nano photo-oxidation dynamic and static combined purification bin is sent to a water and oil remover for filtration through a draught fan, then a part of the gas is sent to the furnace end of the carbonization furnace for combustion promotion through valve adjustment, a part of the gas is sent to the incinerator for combustion, and the rest of the gas is sent to purification equipment for purification treatment, and the purified gas is emptied through a discharge port.
Dust dissipated by the pulverizer and the pulverized coal bin is collected by the dust remover, and the collected dust is sent to the kneader for production.
And (3) introducing part of the denitrated flue gas from the flue of the activation furnace into preactivation equipment for preactivation, purifying the tail gas by the purification equipment 18, and discharging the tail gas from the discharge port 15 after reaching the standard.
The activation furnace is a Sieve activation furnace, denitration is carried out by adopting a selective non-catalytic reduction desulfurization and denitration technology, and a proper amount of NH is alternately sprayed into upper connecting flues of left and right regenerators of the activation furnace along with switching time 3 .H 2 O, the flue gas after denitration passes through exhaust-heat boiler, draught fan, gets into the water tower that dries in the air and carries out water recycle, and the water of retrieving is sent to water treatment center and is handled, and gaseous emission up to standard supplies exhaust-heat boiler and pickling equipment, washing equipment water to the water after water treatment center handles, and the waste water that pickling equipment, washing equipment produced returns water treatment center and handles.
The invention relates to a production process of active carbon and coke, wherein, the active coke which is absorbed and saturated in a desulfurizing tower is sent to a soaking and washing device for pretreatment, dilute sulfuric acid generated by the soaking and washing device is sent to a pickling device for pickling the active carbon, the active coke after soaking and washing is sent to a regenerating furnace for regeneration, a heat source of the regenerating furnace adopts flue gas after denitration of an activating furnace, high-temperature tail gas generated by regeneration of the active coke is sent to the pickling device, heat source and partial sulfuric acid are provided for the pickling device, and the active coke regenerated by the regenerating furnace is sent to a screening and packaging machine for packaging and returned to the desulfurizing tower for utilization.
Further, according to the different properties of the wastewater, the toxic and harmful gas and the dust generated in different working sections in the production process, the wastewater, the waste gas and the dust in each working section are classified, collected and treated. As shown in FIG. 1, firstly, a nano photo-oxidation dynamic and static combined purification bin is arranged at a tar storage tank 1 and a tar pump part, and MSAC is utilized TM Technology (nanometer photo-oxidation dynamic and static combined purification technology) for reducing and purifying various VOC S The method comprises the steps of carrying out a first treatment on the surface of the Dust and VOC at the discharge port of the kneader 5, the granulator 6, the dryer 7 and the carbonization furnace 10 of the production equipment are covered by a gas collecting hood S Collecting, mixing the collected gas with MSAC TM The gas in the purifying bin is sent into a water (oil) removing device for filtering through a draught fan 17, then sent into a carbonization furnace end 9 for promoting combustion through a valve adjusting part, sent into an incinerator 11 for combustion, sent into a purifying device APDT (photo catalytic oxidation purifying device) 18 for purifying treatment, and the purified gas is exhausted through an exhaust port 15. Meanwhile, dust dissipated by the pulverizer 4 and the pulverized coal bin 3 is collected through the dust remover 8, and the collected dust is sent to the kneader 5 for production. Second, an appropriate amount of NH is injected into the incinerator 11 by SNCR technique 3 .H 2 O is subjected to denitration, a parallel desulfurization tower 13 is arranged behind the waste heat boiler 12, active coke is filled in the desulfurization tower for desulfurization, and the purpose of the parallel desulfurization tower is to switch to another tower after adsorption saturation in operation, so that the active coke can be conveniently replaced and regenerated. The purified flue gas is discharged through the discharge port 15 after reaching the standard. Thirdly, the carbonized material from the carbonization furnace 10 is sent to the preactivating device 19, meanwhile, part of the flue gas after denitration is led out from the flue of the activation furnace 20 is sent to the preactivating device 19 for preactivation, and the tail gas is purified by the purifying device 18 and then is discharged from the discharge port 15 after reaching the standard. Pre-living meansAdding the chemical material into a SELP (strep) activation furnace 20 for activation, and alternately spraying a proper amount of NH into upper connecting flues of left and right regenerators of the activation furnace 20 along with switching time 3 .H 2 O, adopting the SNCR technology to perform denitration, enabling the flue gas after denitration to enter a water-cooling tower 23 for water recycling through a waste heat boiler 21 and an induced draft fan 22, and delivering the recycled water to a water treatment center 25 for treatment, wherein the gas is discharged after reaching standards. The activated materials produced by the activation furnace 20 are sent to a uniform mixing (deep activation) device 24 for uniform mixing and then sent to a working section 32 for screening, packaging and selling. Or feeding into acid washing 27, water washing 28, drying 29, packaging and selling 31 for further processing. Fourth, the water recovered by the water-drying tower is sent to the water treatment center 25 for treatment, and then can be used for the waste heat boilers 12 and 21, the acid washing 27 and the water washing 28, and meanwhile, the waste water generated by the acid washing 27 and the water washing 28 is returned to the water treatment center 25 for treatment. The activated coke absorbed and saturated in the desulfurizing tower 13 is sent to a soaking and washing device 26 for pretreatment, dilute sulfuric acid generated by the soaking and washing device 26 is sent to a pickling device 27 for pickling with activated carbon, the soaked and washed activated coke is sent to a regenerating furnace 30 for regeneration, the heat source of the regenerating furnace 30 utilizes flue gas after denitration of the activating furnace 20, and high-temperature tail gas generated by regeneration contains S 2 HO 4 The active coke is sent into a pickling device 27 for use, a heat source and partial sulfuric acid are provided for the pickling device 27, and the active coke regenerated by a regenerating furnace 30 is sent into a working section 31 for packaging and returns to the desulfurizing tower 13 for use.
The invention adopts the process and the equipment to treat toxic and harmful gas on site, effectively utilizes the waste obtained by treatment, returns to the production link for use, not only achieves the aim of protecting the environment, but also fully utilizes the resources.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications made by those skilled in the art to which the present invention pertains without departing from the spirit of the invention, should fall within the scope of the invention as defined in the appended claims.
Claims (10)
1. A system used in the clean production process of activated carbon and coke is characterized in that: comprises a coal tar storage tank (1), a tar metering tank (2), a coal dust metering tank (3), a pulverizer (4), a kneader (5), a granulator (6), a dryer (7), a carbonization furnace (10), a pre-activation device (19), an activation furnace (20), a deep activation uniform mixing device (24), a screening packaging machine (32), a nanometer photo-oxidation dynamic and static combination purification bin (34), a gas collecting hood, a dust remover (8), an incinerator (11), a first waste heat boiler (12), a second waste heat boiler (21), a parallel desulfurization tower (13), a selective non-catalytic reduction device (33), a photocatalytic oxidation purification device (18), a screening packaging device (31) and a water treatment center (25),
the outlet of the coal tar storage tank (1) is connected with the inlet of the tar metering tank (2) through a tar pump, the outlet of the pulverizer (4) is connected with the inlet of the coal powder metering tank (3), the outlet of the tar metering tank (2) and the outlet of the coal powder metering tank (3) are respectively connected with the inlet of the kneader (5), the pulverizer (4) and the coal powder metering tank (3) and the kneader (5) are all provided with dust collectors (8), the outlet of the dust collectors (8) is connected with the inlet of the kneader (5), the outlet of the kneader (5) is connected with the inlet of the granulator (6), the outlet of the granulator (6) is connected with the inlet of the dryer (7), the outlet of the dryer (7) is connected with the inlet of the carbonization furnace (10), the outlet of the preactivation device (19) is connected with the inlet of the activation furnace (20), the outlet of the activation furnace (20) is connected with the inlet of the activation furnace (24) in depth and the activation device (24) is connected with the inlet of the activation device (27), the outlet of the activation device (27 is connected with the pickling device (27) in depth and the mixing device is connected with the inlet of the pickling device (27), the discharge port of the water washing device (28) is connected with the feed port of the drying device (29), the discharge port of the drying device (29) is connected with the packaging device (31),
the tail gas outlet of the carbonization furnace (10) is connected with the air inlet of the incinerator (11), the hot air outlet of the incinerator (11) is connected with the first waste heat boiler (12), the air outlet of the first waste heat boiler (12) is connected with the air inlet of the parallel desulfurization tower (13), the air outlet of the parallel desulfurization tower (13) is connected with the exhaust outlet (15),
the flue gas outlet of the activation furnace (20) is connected with the air inlet of the pre-activation device (19) and the air inlet of the second waste heat boiler (21) respectively, the air outlet of the pre-activation device (19) is connected with the inlet of the photocatalytic oxidation purification device (18), the air outlet of the second waste heat boiler (21) is connected with the flue gas inlet of the water drying tower (23) through the induced draft fan (22), the outlet of the water drying tower (23) is connected with the water treatment center (25), the water outlet of the water treatment center (25) is connected with the water inlet of the pickling device (27), the water inlet of the washing device (28) and the water inlet of the soaking and washing device (26) respectively, the water treated by the water treatment center (25) is used by the first waste heat boiler (12) and the second waste heat boiler (21), the waste water outlet of the pickling device (27) and the waste water outlet of the washing device (28) are connected with the water inlet of the water treatment center (25) respectively,
the nanometer photo-oxidation dynamic and static combined purifying bin (34) is arranged outside the coal tar storage tank (1) and the tar pump, the discharge port of the kneader (5), the discharge port of the granulator (6), the discharge port of the dryer (7) and the discharge port of the carbonization furnace (10) are respectively provided with a gas collecting cover, the gas outlets of the kneader (5), the granulator (6), the dryer (7) and the carbonization furnace (10) are communicated with the gas collecting covers, the gas outlets of the nanometer photo-oxidation dynamic and static combined purifying bin (34) and the gas outlets of the gas collecting covers are connected with a water and oil remover (16), the outlet of the water and oil remover (16) is respectively connected with the furnace end (9) of the carbonization furnace (10), the gas inlet of the incinerator (11) and the inlet of the photocatalytic oxidation purifying equipment (18), the outlet of the photocatalytic oxidation purifying equipment (18) is connected with the discharge port (15),
a selective non-catalytic reduction desulfurization and denitrification device (33) for spraying a proper amount of NH into the incinerator (11) 3 .H 2 O is used for denitration and is also used for alternately spraying a proper amount of NH into upper connecting flues of left and right regenerators of the activation furnace (20) along with switching time 3 .H 2 O；
The clean production process of the activated carbon and the coke comprises the following steps: 1) Pulverizing raw material coal: making raw coal into coal powder by using a pulverizer; 2) Stirring: mixing pulverized coal, tar and water in proportion, and stirring in a kneader; 3) Granulating: delivering the stirred materials into a granulator for granulation; 4) Drying or airing: granulating and then feeding into a dryer; or granulating and then airing; 5) Carbonizing: the dried or aired dried materials are sent into a carbonization furnace for carbonization; 6) Pre-activation: delivering the carbonized material into pre-activation equipment for pre-activation; 7) And (3) secondary activation: the preactivated material is sent into an activation furnace for secondary activation; 8) Deep activation and uniform mixing: delivering the activated material subjected to secondary activation into a uniform mixing device for deep activation and uniform mixing; 9) Screening and packaging: the activated materials after deep activation and uniform mixing are sent to a screening and packaging machine for screening and packaging;
wherein, a gas collecting hood is respectively arranged at the discharge port of the kneader, the discharge port of the granulator, the discharge port of the dryer and the discharge port of the carbonization furnace; dust and VOC that gas collecting hood collected S Sending the waste gas into a water and oil remover for filtration through a draught fan, then sending a part of the waste gas into a furnace end of a carbonization furnace for combustion promotion through valve adjustment, sending a part of the waste gas into an incinerator for combustion, and sending the rest waste gas into purifying equipment for purifying treatment, and exhausting the purified gas through a discharge port; an incinerator is arranged behind the carbonization furnace, a waste heat boiler is arranged behind the incinerator, and a proper amount of NH is sprayed into the incinerator by adopting selective non-catalytic reduction desulfurization and denitrification equipment 3 .H 2 O is subjected to denitration, a parallel desulfurization tower is arranged behind the waste heat boiler, active coke is filled in the desulfurization tower for desulfurization, and the purified flue gas is discharged through a discharge port to reach the standard; the tail gas generated by the preactivation equipment is purified by the purification equipment and then discharged from the discharge port after reaching the standard.
2. The clean production system of activated carbon and coke according to claim 1, wherein: the desulfurization tower also comprises a regenerating furnace (30), wherein a coke discharging port of the desulfurization tower (13) is connected with a feed port of the soaking and washing equipment (26), a discharge port of the soaking and washing equipment (26) is connected with the feed port of the regenerating furnace (30), and a discharge port of the regenerating furnace (30) is connected with a feed port of the screening and packaging equipment (31).
3. A clean production process of activated carbon and coke using the clean production system of activated carbon and coke according to claim 1 or 2, characterized in that: the method comprises the following steps: 1) Pulverizing raw material coal: making raw coal into coal powder by using a pulverizer; 2) Stirring: mixing pulverized coal, tar and water in proportion, and stirring in a kneader; 3) Granulating: delivering the stirred materials into a granulator for granulation; 4) Drying or airing: granulating and then feeding into a dryer; or granulating and then airing; 5) Carbonizing: the dried or aired dried materials are sent into a carbonization furnace for carbonization; 6) Pre-activation: delivering the carbonized material into pre-activation equipment for pre-activation; 7) And (3) secondary activation: the preactivated material is sent into an activation furnace for secondary activation; 8) Deep activation and uniform mixing: delivering the activated material subjected to secondary activation into a uniform mixing device for deep activation and uniform mixing; 9) Screening and packaging: the activated materials after deep activation and uniform mixing are sent to a screening and packaging machine for screening and packaging;
wherein, a gas collecting hood is respectively arranged at the discharge port of the kneader, the discharge port of the granulator, the discharge port of the dryer and the discharge port of the carbonization furnace; dust and VOC that gas collecting hood collected S Sending the waste gas into a water and oil remover for filtration through a draught fan, then sending a part of the waste gas into a furnace end of a carbonization furnace for combustion promotion through valve adjustment, sending a part of the waste gas into an incinerator for combustion, and sending the rest waste gas into purifying equipment for purifying treatment, and exhausting the purified gas through a discharge port; an incinerator is arranged behind the carbonization furnace, a waste heat boiler is arranged behind the incinerator, and a proper amount of NH is sprayed into the incinerator by adopting selective non-catalytic reduction desulfurization and denitrification equipment 3 .H 2 O is subjected to denitration, a parallel desulfurization tower is arranged behind the waste heat boiler, active coke is filled in the desulfurization tower for desulfurization, and the purified flue gas is discharged through a discharge port to reach the standard; the tail gas generated by the preactivation equipment is purified by the purification equipment and then discharged from the discharge port after reaching the standard.
4. A process for producing activated carbon and coke according to claim 3, characterized in that: before the step 2), the tar is sent into the tar metering tank by the tar storage tank through the tar pump, and the raw material coal is made into pulverized coal by the pulverizer and then sent into the pulverized coal metering tank.
5. The process for producing activated carbon and coke according to claim 4, wherein: the coal tar storage tank and the tar pump are externally provided with a nano photo-oxidation dynamic-static combined purifying bin which is used for purifying VOC S The gas in the nano photo-oxidation dynamic-static combined purifying bin is sent into the purifying bin through the induced draft fanThe water and oil remover is used for filtering, then a part of the fuel is sent into the furnace end of the carbonization furnace to promote combustion through valve adjustment, part of the gas is sent into an incinerator for combustion, the rest of the gas is sent into a purifying device for purifying treatment, and the purified gas is exhausted through an exhaust port.
6. The process for producing activated carbon and coke according to claim 5, wherein: and (3) delivering the activated materials subjected to deep activation and uniform mixing in the step (8) into acid pickling equipment for acid pickling, water washing equipment for water washing, drying in drying equipment, and finally packaging in packaging equipment.
7. The process for producing activated carbon and coke according to claim 6, wherein: dust dissipated by the pulverizer and the pulverized coal bin is collected by the dust remover, and the collected dust is sent to the kneader for production.
8. The clean production process of activated carbon and coke according to claim 7, wherein: and (3) leading out part of the flue gas after denitration from the flue of the activation furnace, sending the flue gas into preactivation equipment for preactivation, purifying tail gas of the flue gas by the purification equipment, and discharging the tail gas from a discharge port to reach the standard.
9. The clean production process of activated carbon and coke according to claim 8, wherein: in the step 7), the activation furnace is a Sieve activation furnace, the denitration is carried out by adopting a selective non-catalytic reduction desulfurization and denitration technology, and a proper amount of NH is alternately sprayed into upper connecting flues of left and right regenerators of the activation furnace along with switching time 3 .H 2 O, the flue gas after denitration passes through exhaust-heat boiler, draught fan, gets into the water tower that dries in the air and carries out water recycle, and the water of retrieving is sent to water treatment center and is handled, and gaseous emission up to standard supplies exhaust-heat boiler and pickling equipment, washing equipment water to the water after water treatment center handles, and the waste water that pickling equipment, washing equipment produced returns water treatment center and handles.
10. The clean production process of activated carbon and coke according to claim 9, wherein: the method comprises the steps that activated coke which is adsorbed and saturated in a desulfurizing tower is sent to soaking and washing equipment for pretreatment, dilute sulfuric acid generated by the soaking and washing equipment is sent to acid washing equipment for activated carbon acid washing, the soaked and washed activated coke is sent to a regenerating furnace for regeneration, a heat source of the regenerating furnace adopts flue gas after denitration of an activating furnace, high-temperature tail gas generated by regeneration of the activated coke is sent to acid washing equipment, heat source and partial sulfuric acid are provided for the acid washing equipment, and the activated coke regenerated by the regenerating furnace is sent to a screening and packaging machine for packaging and returning to the desulfurizing tower for utilization.
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| CN113636552B (en) * | 2020-05-11 | 2022-12-06 | 中冶长天国际工程有限责任公司 | Method for preparing high-performance activated carbon by classified milling and classified kneading |
| CN111675216A (en) * | 2020-07-22 | 2020-09-18 | 湖南鑫恒环境科技有限公司 | Method and device for preparing activated carbon by extracting coal slime |
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