CN107963796A - A kind of continous way steel rolling greasy filth pyrolysis charring processing unit and method - Google Patents
A kind of continous way steel rolling greasy filth pyrolysis charring processing unit and method Download PDFInfo
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- CN107963796A CN107963796A CN201711394912.1A CN201711394912A CN107963796A CN 107963796 A CN107963796 A CN 107963796A CN 201711394912 A CN201711394912 A CN 201711394912A CN 107963796 A CN107963796 A CN 107963796A
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 318
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 84
- 239000010959 steel Substances 0.000 title claims abstract description 84
- 238000005096 rolling process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 144
- 238000001816 cooling Methods 0.000 claims abstract description 108
- 239000007789 gas Substances 0.000 claims abstract description 91
- 239000000463 material Substances 0.000 claims abstract description 66
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 239000002918 waste heat Substances 0.000 claims abstract description 28
- 238000003763 carbonization Methods 0.000 claims description 306
- 239000010802 sludge Substances 0.000 claims description 100
- 238000002485 combustion reaction Methods 0.000 claims description 76
- 239000010731 rolling oil Substances 0.000 claims description 67
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 63
- 239000003546 flue gas Substances 0.000 claims description 63
- 239000003921 oil Substances 0.000 claims description 35
- 239000011343 solid material Substances 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 24
- 239000000779 smoke Substances 0.000 claims description 23
- 239000000498 cooling water Substances 0.000 claims description 19
- 238000009423 ventilation Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009298 carbon filtering Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000003517 fume Substances 0.000 abstract 1
- 238000003672 processing method Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000004517 catalytic hydrocracking Methods 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 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 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- 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
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- 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
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- 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
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Combustion & Propulsion (AREA)
- Processing Of Solid Wastes (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a kind of continous way steel rolling greasy filth pyrolysis charring processing unit, including：Apparatus for feeding；Pyrolysis charring equipment, it includes：The pyrolysis charring storehouse being connected with apparatus for feeding, it is the place for receiving the material from apparatus for feeding and pyrolysis charring processing being carried out to material, the material conveying mechanism being arranged in pyrolysis charring storehouse, for material to be delivered to output terminal from input terminal, and for maintaining to react the heating equipment of required temperature in pyrolysis charring storehouse；Cooling device, is connected with pyrolysis charring equipment, and the residue for being discharged to pyrolysis charring equipment carries out cooling treatment；Combustible gas processing equipment, is connected with the gas vent of pyrolysis charring equipment, for carrying out burning processing to gas.The processing unit and processing method can achieve the purpose that danger wastes definitely contracting amount, discharged gas fume fully meeting discharge standard continuously by the complete pyrolysis charring of steel rolling greasy filth, at the same time suitable for miniaturization, invest small, safe for operation, waste heat can be used.
Description
Technical Field
The invention relates to a continuous steel rolling oil sludge pyrolysis carbonization treatment device and method, which are particularly suitable for treatment of steel rolling oil sludge and belong to the field of hazardous solid waste treatment.
Background
The steel yield of China is the first iron and steel world in many years, and is the first iron and steel country in the world, particularly the strip steel rolling and coating industry, which is worthy of the name, and the production capacity and the yield are rapidly developed after 2005. In the process of plate and strip steel rolling, rolling oil or emulsion is required to be used for spraying a roll gap of a roll so as to achieve the effects of cooling and lubrication, the rolling oil or the emulsion can be subjected to deterioration and separation under the long-term high-temperature rolling effect, and the deteriorated oil and impurities generated in the rolling process are separated out through a filter, an oil skimmer and the like of a process lubrication and filtration system of a steel rolling equipment so as to form waste oil sludge.
The waste oil sludge of the steel rolling system is called steel rolling oil sludge, the volume of the oil sludge is expanded after the original microorganism fermentation, the oil sludge has odor, the oil sludge has great harm to the environment, the oil sludge is classified as dangerous waste by the environmental protection department, the serial number HW08, and how to scientifically and safely treat the steel rolling oil sludge is an important subject. At present, the steel rolling oil sludge treatment methods mainly comprise: acid washing with concentrated sulfuric acid and clay adsorption, filtering and hydrogenation catalytic cracking, and burning. The basic lubricating oil can be refined by the concentrated sulfuric acid pickling and clay adsorption method, but new dangerous waste can be generated by the pickling and clay adsorption method, the generated amount is large, the method is not a real environment-friendly and safe method, and the method is called by the environmental protection department at present. The incineration method is to burn and dispose the oil sludge by using an incinerator, which can basically and completely eliminate the wastes, but has large scale of incineration disposal requirement, complex subsequent disposal process and can generate harmful substances such as dioxin and the like. The filtration and hydrocracking method is that firstly, the oil sludge is heated and filtered, then the pressure hydrogenation is carried out, and useful oil or other organic liquid gas with different purposes is generated, so that the useful substances in the oil sludge can be reused; however, the filtration and hydrocracking process has high technical threshold and large investment, and because the process is operated under high pressure, the conditions are harsh, more alloy steel is needed, and unsafe factors are higher, so the process is not suitable for small-scale treatment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a continuous steel rolling oil sludge pyrolysis carbonization treatment device and a continuous steel rolling oil sludge pyrolysis carbonization treatment method, wherein the device can treat steel rolling oil sludge in a scientific and safe manner and recycle the heat of the steel rolling oil sludge.
In order to achieve the purpose, the invention adopts the following technical scheme:
a continuous steel rolling oil sludge pyrolysis carbonization treatment device comprises:
a feeding device;
pyrolysis carbonization equipment includes: the device comprises a pyrolysis carbonization bin, a material conveying mechanism and heating equipment; the pyrolysis carbonization bin is connected with the feeding equipment and is a place for receiving the materials from the feeding equipment and performing pyrolysis carbonization treatment on the materials; the material conveying mechanism is arranged in the pyrolysis carbonization bin and is used for conveying the materials in the pyrolysis carbonization bin from the input end to the output end; the heating equipment is used for maintaining the temperature required by the reaction in the pyrolysis carbonization bin;
the cooling equipment is connected with the solid material outlet of the pyrolysis carbonization equipment and is used for cooling the residue discharged by the pyrolysis carbonization equipment;
and the combustible gas treatment equipment is connected with the gas outlet of the pyrolysis carbonization equipment and is used for carrying out combustion treatment on the gas discharged by the pyrolysis carbonization equipment.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the feeding device includes a screw pump and a feeding pipe, and the screw pump is connected with an inlet of the pyrolysis carbonization device through the feeding pipe.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the cooling device includes a cooling bin and a cooling assembly; the cooling bin comprises a cooling bin body, an inlet end and an outlet end; the interior of the cooling bin body is in a hollow tubular shape; the upper part of the inlet end of the cooling bin is provided with an inlet which is connected with a solid material outlet of the pyrolysis carbonization equipment; a discharge hole is formed in the lower part of the outlet end of the cooling bin; the cooling assembly is arranged outside the cooling bin body, and a water inlet of the cooling assembly is connected with cooling water supply equipment through a cooling water control valve; preferably, a material conveying mechanism is arranged inside the cooling bin and used for conveying residues from an inlet of the cooling bin to a discharge hole of the cooling bin; more preferably, a high-temperature rotary valve is arranged at the joint of the pyrolysis carbonization equipment and the cooling bin.
In the above continuous type rolled steel oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the combustible gas treatment device includes: the combustion nozzle, the ventilation pipeline and the combustion-supporting fan; the burner nozzle comprises a flow guide pipe and a combustion pipe sleeved outside the outlet end of the flow guide pipe; the guide pipe is connected with a gas outlet of the pyrolysis carbonization bin; one end of the combustion pipe is communicated with the ventilation pipeline, the opening direction of the other end of the combustion pipe is consistent with the outlet direction of the flow guide pipe, and the other end of the combustion pipe protrudes out of the outlet end of the flow guide pipe by a certain distance to form a combustion treatment place; and the combustion-supporting fan supplies air to the combustion pipe through a ventilation pipeline.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment device, as a preferred embodiment, the material conveying mechanism is a spiral conveying shaft; preferably, 2-5 pyrolysis carbonization bins are arranged, and along the advancing direction of the materials, the solid material outlet of each front pyrolysis carbonization bin is connected with the inlet of the next pyrolysis carbonization bin; a material conveying mechanism is arranged in each pyrolysis carbonization bin; more preferably, the pyrolysis carbonization equipment is provided with 4 pyrolysis carbonization bins, wherein an inlet of a first pyrolysis carbonization bin is connected with the feeding equipment, a solid material outlet of the first pyrolysis carbonization bin is connected with an inlet of a second pyrolysis carbonization bin, a solid material outlet of the second pyrolysis carbonization bin is connected with an inlet of a third pyrolysis carbonization bin, and a solid material outlet of the third pyrolysis carbonization bin is connected with an inlet of a fourth pyrolysis carbonization bin; an outlet of the fourth pyrolysis carbonization bin is connected with the cooling equipment; further preferably, each pyrolysis carbonization bin is arranged in parallel up and down.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the heating device includes a heating assembly, a heating source connected to the heating assembly, and a switch valve for controlling whether the heating source is heated or not.
In the continuous steel rolling oil sludge pyrolysis carbonization treatment device, as a preferred embodiment, the heating component is a resistance wire, and the resistance wire is arranged outside the pyrolysis carbonization bin in a surrounding manner; preferably, the heating assembly further comprises a heating pipeline, the heating pipeline is arranged outside the pyrolysis carbonization bin in a surrounding mode, and the heating pipeline is communicated with the burner tip so as to transmit heat generated by combustion of flue gas to the pyrolysis carbonization bin through the heating pipeline;
in the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the heating assembly is a heating furnace, the heating furnace is arranged around the outside of all the pyrolysis carbonization bins, and a shell of the heating furnace is at least provided with a gas inlet, a smoke outlet and an ash cleaning port; the gas inlet is arranged below the heating furnace, a burner is arranged at the gas inlet, and a switch valve is arranged on the burner; the ash removing port is arranged below the heating furnace; the smoke outlet is arranged above the heating furnace and used for discharging high-temperature smoke; preferably, the burner tip is located inside the heating furnace.
In the above continuous rolled steel oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the continuous rolled steel oil sludge pyrolysis carbonization treatment apparatus further includes: a temperature sensing element and an electrical control system; the temperature detection element is arranged on the pyrolysis carbonization bin, is connected with the electrical control system, and is used for collecting temperature data and transmitting the temperature data to the electrical control system; the electric control system is at least connected with the temperature detection element and the switch valve of the heating equipment and is used for receiving the temperature data transmitted by the temperature detection element and sending an instruction to control the working state of the heating equipment according to a comparison result of the temperature data and the set temperature; preferably, when the temperature data transmitted by the temperature detection element reaches the set temperature of the electric control system, the electric control system sends out an instruction for turning off the heating equipment; and when the temperature data transmitted by the temperature detection element does not reach the set temperature of the electric control system, the electric control system sends out an instruction for opening the heating equipment.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the electrical control system is further connected to at least one of the high-temperature rotary valve, the motor controlling the operation of the material conveying mechanism arranged in the pyrolysis carbonization bin, the motor controlling the operation of the material conveying mechanism arranged in the cooling bin, and the cooling water control valve, so as to regulate and control corresponding components.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, a temperature detection element is also arranged at an outlet of the cooling bin, the temperature detection element and the cooling water control valve are connected to the electrical control system, and are used for collecting temperature data of cooled residues and transmitting the temperature data to the electrical control system, and the electrical control system sends a corresponding regulation and control instruction to the cooling water control valve according to a set cooling temperature.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the electrical control device is a PLC control system, and the temperature detection element is a temperature sensor.
In the above continuous rolled steel oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the continuous rolled steel oil sludge pyrolysis carbonization treatment apparatus further includes: the system comprises a flue gas waste heat boiler, a low-temperature flue gas treatment device and a draught fan; the flue gas waste heat boiler is connected with a smoke outlet of the heating furnace; the low-temperature flue gas treatment device is connected with a smoke outlet of the flue gas waste heat boiler, and an exhaust port of the low-temperature flue gas treatment device is connected with the induced draft fan; preferably, the low-temperature flue gas treatment device comprises a cloth bag dust removal device and an activated carbon filtering device.
A continuous steel rolling oil sludge pyrolysis carbonization treatment method is implemented by adopting the continuous steel rolling oil sludge pyrolysis carbonization treatment device, and sequentially comprises the following steps:
preheating: starting the heating equipment for heating, and when the pyrolysis carbonization bin reaches a preset temperature, starting inputting oil sludge into the pyrolysis carbonization bin for treatment by the feeding equipment;
and (3) pyrolysis and carbonization steps: carrying out pyrolysis and carbonization treatment on the oil sludge in the pyrolysis and carbonization bin under the continuous transmission of the material conveying mechanism;
and a residue cooling step: cooling the residue obtained in the step of pyrolysis and carbonization in the cooling bin, and then discharging;
a gas treatment step: and (4) carrying out combustion treatment on the gas obtained in the step of pyrolysis and carbonization, and then discharging.
In the method for the pyrolysis and carbonization treatment of the continuous steel rolling oil sludge, as a preferred embodiment, the predetermined temperature is 800-900 ℃; the period of the pyrolysis carbonization treatment is 12-18 min.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment method, as a preferred embodiment, in the pyrolysis carbonization step, the volume ratio of combustible gas generated in the pyrolysis carbonization bin to air introduced is 1: 10-15.
In the above method for the pyrolysis and carbonization treatment of the continuous steel rolling oil sludge, as a preferred embodiment, in the step of cooling the residue, the temperature of the residue is reduced to 60-120 ℃ and then the residue is discharged.
In the continuous steel rolling oil sludge pyrolysis carbonization treatment method, as a preferred embodiment, in the pyrolysis carbonization step, the rotating speed of the material conveying mechanism is 0-40 r/min; more preferably 18-22 r/min; in the residue cooling step, the rotating speed of the material conveying mechanism is 5-15 r/min; more preferably 10 r/min;
in the above method for processing oil sludge from continuous rolling by pyrolysis and carbonization, as a preferred embodiment, the method further comprises: the waste heat of the pyrolysis carbonization step and the flue gas waste heat of the gas treatment step are recovered; and a step of treating the low-temperature flue gas generated after the flue gas waste heat is recovered, wherein the low-temperature flue gas is treated to reach the standard and then is discharged.
The technical scheme provided by the invention has the beneficial effects that:
the continuous steel rolling oil sludge pyrolysis carbonization treatment device provided by the invention is more suitable for the treatment requirement of steel rolling oil sludge, and has the characteristics of safety, scientificity, environmental friendliness and small scale. The continuous steel rolling oil sludge pyrolysis carbonization treatment method provided by the invention can realize that steel rolling oil sludge is treated in a scientific and safe manner, and the heat of the steel rolling oil sludge is recycled.
The continuous steel rolling oil sludge pyrolysis carbonization treatment device provided by the invention can be used for continuously and completely pyrolyzing and carbonizing steel rolling oil sludge, so that the purpose of absolute reduction of hazardous wastes is achieved (the residue is only 4-10% of the weight of crude oil sludge), and the discharged flue gas completely meets the national and local emission standards. The continuous steel rolling oil sludge pyrolysis carbonization treatment device and method provided by the invention can be used for treating steel rolling oil sludge and other organic wastes.
Drawings
FIG. 1 is a schematic structural diagram of a continuous steel rolling oil sludge pyrolysis carbonization treatment device in a preferred embodiment of the invention;
FIG. 2 is a schematic view of a combustion supporting burner according to a preferred embodiment of the present invention;
FIG. 3 is a schematic process flow diagram of a continuous steel rolling oil sludge pyrolysis carbonization treatment method in the preferred embodiment of the invention.
In the figure: 1-feeding pipe, 2-pyrolysis carbonization bin, 21-first pyrolysis carbonization bin, 22-second pyrolysis carbonization bin, 23-third pyrolysis carbonization bin, 24-fourth pyrolysis carbonization bin, 3-shell, 4-high temperature rotary valve, 5-cooling bin, 6-cooling component, 7-discharging port, 8-ash removing port, 9-burner, 10-smoke exhaust port, 11-combustion-supporting fan, 12-burner, 121-draft tube, 122-combustion tube and 13-hearth.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the description of the present invention, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the continuous steel rolling oil sludge pyrolysis carbonization treatment device provided by the invention is suitable for continuous operation of high-temperature pyrolysis treatment of steel rolling oil sludge. The device includes: a feeding device; the pyrolysis carbonization equipment is connected with the feeding equipment and is used for receiving the material from the feeding equipment and carrying out pyrolysis carbonization treatment; the cooling equipment is connected with the solid material outlet of the pyrolysis carbonization equipment and is used for cooling the residue discharged by the pyrolysis carbonization equipment; the combustible gas treatment equipment is connected with a gas outlet of the pyrolysis carbonization equipment and is used for burning the gas discharged by the pyrolysis carbonization equipment. The above devices are explained one by one below.
And the feeding device is connected with the inlet of the pyrolysis carbonization device and is used for feeding materials (such as steel rolling oil sludge) into the pyrolysis carbonization device. In a preferred embodiment of the present invention, the feeding device comprises a screw pump (not shown in the figure) and the feeding pipe 1, and the screw pump is connected with the inlet of the pyrolysis and carbonization device through the feeding pipe 1. When the device works, the prepared steel rolling oil sludge is sucked by the screw pump and discharged into the pyrolysis carbonization equipment through the feeding pipe 1.
Pyrolysis carbonization equipment includes: pyrolysis and carbonization storehouse 2, material conveying mechanism and firing equipment. The pyrolysis carbonization bin 2 is a place for receiving materials from the feeding equipment and performing pyrolysis carbonization treatment on the materials; the material conveying mechanism is arranged in the pyrolysis carbonization bin 2 and is used for conveying materials from the inlet end to the outlet end of the pyrolysis carbonization bin 2; and the heating equipment is used for maintaining the temperature required by the reaction in the pyrolysis carbonization bin 2.
The cooling device is connected with a solid material outlet of the pyrolysis carbonization device and used for cooling the residue discharged by the pyrolysis carbonization device, and comprises a cooling bin 5 and a cooling assembly 6. The cooling bin 5 is a place for cooling the residue output from the solid material outlet of the pyrolysis carbonization equipment, and comprises a cooling bin body, an inlet end and an outlet end; the interior of the cooling bin body is in a hollow tubular shape and is horizontally arranged; the inlet end is provided with an inlet which is connected with the solid material outlet of the pyrolysis carbonization equipment and is used for receiving the residue output by the pyrolysis carbonization equipment; the lower part of the outlet end is provided with a discharge hole 7 for discharging cooled residues. Preferably, a material conveying mechanism is also arranged inside the cooling bin body and is used for conveying the residues output from the pyrolysis and carbonization equipment from an inlet of the cooling bin 5 to a discharge port 7 of the cooling bin 5; in a preferred embodiment of the present invention, the material conveying mechanism may be a screw conveying shaft, which not only can perform a conveying function but also can perform a material stirring function, thereby achieving rapid cooling of the material. The cooling assembly 6 is arranged outside the cooling bin body and cools the materials in the cooling bin body through flowing cooling media; specifically, circulating water cooling may be adopted, the material in the cooling bin body is cooled by cooling water which circulates, and the water inlet of the cooling module 6 is connected with a cooling water supply device (not shown in fig. 1) through a cooling water control valve; in a preferred embodiment of the present invention, the cooling member may be a cooling water tank 6. In the preferred embodiment provided by the invention, a high-temperature rotary valve 4 is arranged at the joint of the pyrolysis carbonization equipment and the cooling bin 5; high temperature rotary valve 4 drives the rotatory residue with pyrolysis carbonization equipment solid material exit through the motor and sends into cooling bin 5 to can make pyrolysis carbonization equipment keep apart with the outside air, avoid oxygen to get into, also have certain isolated effect to the heat simultaneously, can keep pyrolysis carbonization equipment in the heat.
And the combustible gas treatment equipment is connected with the gas outlet of the pyrolysis carbonization equipment and is used for carrying out combustion treatment on the gas (containing combustible gas) discharged by the pyrolysis carbonization equipment. Specifically, the combustible gas treatment device comprises a burner tip 12, a ventilation duct and a combustion fan 11; the burner tip 12 is a sleeve structure (as shown in fig. 2), and includes a flow guide tube 121 and a combustion tube 122 sleeved outside an outlet end of the flow guide tube; the draft tube 121 is connected with a gas outlet of the pyrolysis carbonization bin 2, and is used for outputting gas (containing combustible gas) generated by pyrolysis carbonization treatment in the pyrolysis carbonization bin 2 to the combustion tube 122; one end of the combustion tube 122 is communicated with the ventilation duct to receive the air input from the combustion fan 11, the opening direction of the other end of the combustion tube 122 is the same as the outlet direction of the draft tube 121, but the length of the combustion tube 122 is longer than the length of the draft tube 121 (in the flue gas outlet direction, the outlet end of the combustion tube 122 protrudes a distance from the outlet end of the draft tube 121 sleeved in the combustion tube 122, in other words, as shown in fig. 2, the end face position of the outlet end of the combustion tube 122 extends a distance from the end face position of the outlet end of the draft tube 121) to form a place for combustion treatment. During treatment, gas (containing combustible gas) generated by pyrolysis and carbonization enters the combustion tube 122 through the guide tube 121, air is sent into the combustion tube 122 through the ventilation pipeline by the combustion fan 11 and is sprayed out from the space between the combustion tube 122 and the guide tube 121 at a high speed to form a siphon effect on the combustible gas in the middle core layer, the combustible gas is driven to flow out of the guide tube 121 and be mixed with the air, combustion is performed at a high temperature, and after the combustible gas is sufficiently combusted, smoke is discharged. The heat generated by the combustion process can be recycled, for example, for heating the pyrolysis carbonization bin 2. In the preferred embodiment of the invention, the continuous steel rolling oil sludge pyrolysis carbonization treatment device has four pyrolysis carbonization bins 2, the gas outlet at the upper part of each pyrolysis carbonization bin 2 is connected with a guide pipe 121, and the outer part of the outlet end of each guide pipe 121 is sleeved with a combustion pipe 122; one end of each combustion tube 122 is communicated with the ventilation pipe, and the opening direction of the other end (outlet end) is consistent with the outlet direction of the guide pipe 121, but the length is larger than that of the guide pipe, so as to form a combustion treatment place, that is, the outlet end of each combustion tube 122 coincides with the axis of the outlet end of the guide pipe 121, and the outlet end of the combustion tube 122 protrudes a distance beyond the outlet end of the guide pipe 121 sleeved in the combustion tube 122. The combustion fan 11 supplies air into the combustion tube through a ventilation duct.
In the pyrolysis carbonization equipment, a pyrolysis carbonization bin 2 comprises a bin body, an inlet end and an outlet end; the interior of the bin body is in a hollow tubular shape and is horizontally arranged; the inlet end is provided with an inlet which is connected with the feeding equipment and used for receiving the materials; the lower part of the outlet end is provided with a solid material outlet for discharging residues (mainly carbon, iron, impurities and the like) generated after pyrolysis and carbonization treatment; the upper part of the bin body is provided with a gas outlet for discharging gas generated by pyrolysis and carbonization treatment. The material carries out pyrolysis and carbonization treatment under high temperature anaerobic environment in the process of advancing in pyrolysis and carbonization storehouse 2, and material (steel rolling fatlute) takes place to decompose and produces gas (containing combustible gas) and residue promptly, is the malleation in the pyrolysis and carbonization storehouse 2 this moment, and gas is discharged through the gas outlet, and the residue is then discharged through the solid material export. The pyrolysis carbonization bins 2 can be arranged in a plurality of numbers, preferably 2-5 numbers, along the advancing direction of the materials, the solid material outlet of each previous pyrolysis carbonization bin is connected with the inlet of the next pyrolysis carbonization bin, and the arrangement can ensure that the pyrolysis carbonization reaction of the materials in the bins is more sufficient. In the preferred embodiment of the present invention, there are 4 pyrolysis carbonization bins 2, the inlet of the first pyrolysis carbonization bin 21 is connected to the feeding device, the solid material outlet of the first pyrolysis carbonization bin 21 is connected to the inlet of the second pyrolysis carbonization bin 22, the solid material outlet of the second pyrolysis carbonization bin 22 is connected to the inlet of the third pyrolysis carbonization bin 23, and the solid material outlet of the third pyrolysis carbonization bin 23 is connected to the inlet of the fourth pyrolysis carbonization bin 24; an outlet of the fourth pyrolysis carbonization bin 24 is connected with cooling equipment; and a material conveying mechanism is arranged in each pyrolysis carbonization bin. The placement of the plurality of pyrolysis carbonization bins is designed according to the specific use environment, and in the preferred embodiment of the invention, in order to save the field, the pyrolysis carbonization bins are placed in parallel up and down. The pyrolysis carbonization bin is a closed bin body and is isolated from external oxygen.
In the pyrolysis and carbonization equipment, the working part of the material conveying mechanism is positioned in the pyrolysis and carbonization bin 2 (namely the inside of the bin body), and is axially arranged between the inlet end and the outlet end along the pyrolysis and carbonization bin 2, and under the driving of an external motor, the working part can convey the material input by the feeding equipment to the outlet end from the inlet end of the pyrolysis and carbonization bin 2 in the moving process. In the preferred embodiment of the invention, the material conveying mechanism can be a spiral conveying shaft which is connected with an external motor and is driven by the motor to spirally rotate, so that the material conveying mechanism not only can play a conveying role, but also can play a role in stirring materials, and thus, the full reaction of the materials is realized.
In the pyrolysis carbonization equipment, the heating equipment is used for maintaining the temperature required by the reaction in the pyrolysis carbonization bin 2 and comprises a heating component, a switch valve and a heating source which is controlled by the switch valve and is connected with the heating component; the heating component is arranged on the pyrolysis carbonization bin 2 and is used for heating the pyrolysis carbonization bin 2; the switch valve is used for controlling whether the heating source works or not. The heating device can be an electric heating device which adopts electricity for heating, can also be a natural gas heating device which adopts natural gas for heating, or a heating device which adopts combustible gas generated in the burning pyrolysis carbonization bin 2 for heating; the above devices may be used in combination.
In the preferred embodiment of the present invention, the heating device is electrically heated, and specifically, the heating component of the heating device is a resistance wire, and the resistance wire is arranged around the outside of the pyrolysis carbonization bin 2, so as to uniformly heat the pyrolysis carbonization bin 2. More preferably, combustible gas generated by burning the pyrolysis and carbonization bin 2 is further adopted to supplement the heating pyrolysis and carbonization bin 2, and at this time, the heating assembly further comprises a heating pipeline (not shown in the figure) which is arranged outside the pyrolysis and carbonization bin 2 in a surrounding manner, and the heating pipeline is communicated with the burner 12 so as to transmit heat generated by burning the flue gas to the pyrolysis and carbonization bin 2 through the heating pipeline.
In another preferred embodiment of the present invention, the heating device is heated by using fuel gas, specifically, the heating component of the heating device is a heating furnace, the heating furnace is arranged around the outside of all the pyrolysis carbonization bins 2, and flame and high-temperature flue gas generated by combustion of fuel gas provide heat to uniformly heat the pyrolysis carbonization bins 2; the shell 3 of the heating furnace is at least provided with a gas inlet, a smoke outlet 10 and an ash removal port 8; the gas inlet is arranged below the heating furnace, the gas inlet is provided with a burner 9 (namely a heating source), and whether the burner 9 is heated or not is controlled by a switch valve connected with the burner 9; the ash cleaning port 8 is also arranged below the heating furnace and is used for manually cleaning ash; the smoke outlet 10 is arranged above the heating furnace and used for discharging high-temperature smoke. More preferably, the pyrolysis and carbonization bin 2 is heated by combusting the combustible gas generated by the pyrolysis and carbonization bin 2, at this time, the burner tip 12 is located inside the heating furnace, i.e. in the hearth 13 of the heating furnace, the combustible gas generated by the carbonization reaction of the pyrolysis and carbonization bin 2 generates a large amount of heat after combustion, and the combustion reaction occurs in the heating furnace, so that the generated heat can maintain the temperature in the heating furnace at the temperature required by the pyrolysis and carbonization reaction; specifically, at the beginning of the operation of the device, the burner 9 (i.e. the heating source) generates heat by burning gas (preferably natural gas) to preheat the heating furnace, so as to reach a predetermined temperature in the pyrolysis and carbonization chamber 2, after the pyrolysis process starts and the temperature in the heating furnace can be maintained at the predetermined temperature by burning the generated combustible gas, the electronic control system can send a closing instruction to close the switch valve of the heating device (e.g. without the electronic control system, or manually close), and then the temperature in the heating furnace is maintained at the temperature required by the pyrolysis and carbonization reaction by burning the combustible gas generated by the pyrolysis and carbonization chamber 2. In the present invention, natural gas is preferably used for preheating, and a burner provided in the heating furnace completes combustion of combustible gas generated by the pyrolysis reaction.
The above continuous rolled steel oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, further comprises: temperature sensing element and electrical control system. Wherein the electrical control system is connected with at least the temperature detection element and the switch valve of the heating device; the temperature detection element is arranged on the pyrolysis carbonization bin 2 or on the heating furnace (which can monitor the temperature in the heating hearth), is connected with the electrical control system and is used for collecting temperature data and transmitting the temperature data to the electrical control system, then the electrical control system compares the collected temperature data with the preset heating temperature, when the collected temperature data is lower than the preset heating temperature, the electrical control system commands the heating equipment to open the switch valve to start heating, and when the collected temperature data is equal to or higher than the preset heating temperature, the electrical control system commands the heating equipment to close the switch valve to stop heating, so that the electrical control system can regulate and control the temperature of the pyrolysis carbonization bin 2 in real time. The temperature detecting element may be a temperature sensor; in the preferred embodiment of the present invention, a temperature sensor is disposed on the pyrolysis carbonization bin 2 for transmitting the temperature data inside the pyrolysis carbonization bin 2 to the electrical control system. The electric control system is at least connected with the temperature detection element and the switch valve of the heating equipment and is used for receiving the temperature data transmitted by the temperature detection element and sending an instruction to control the working state (such as starting, closing, adjusting the heating mode and the like) of the heating equipment so as to ensure that the temperature of the pyrolysis carbonization bin 2 is moderate; specifically, when the temperature detected by the temperature detection element is lower than the temperature set in the electrical control system, the electrical control system sends a command to open an on-off valve of the heating device to supplement heat; when the temperature detected by the temperature detection element is higher than the temperature set in the electric control system, the electric control system sends out an instruction to close a switch valve of the heating system, and the cabin performs self-circulation reaction. Since the pyrolysis carbonization treatment needs to be performed in a high-temperature environment, in order to maintain the temperature condition, the heating device needs to properly heat in time to adjust and maintain the temperature in the pyrolysis carbonization bin 2.
In the above continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus, as a preferred embodiment, the electrical control system may be further connected to at least one of the high temperature rotary valve 4, a motor for controlling the operation of a material conveying mechanism, such as a screw conveying shaft, arranged in the pyrolysis carbonization bin 2, a motor for controlling the operation of a material conveying mechanism, such as a screw conveying shaft, arranged in the cooling bin 5, and a cooling water control valve, so as to regulate and control the corresponding components. The electrical control device may be a PLC control system.
In order to monitor whether the cooling treatment condition in the cooling bin 5 is normal or not, and facilitate continuous and stable operation of the continuous steel rolling sludge pyrolysis and carbonization treatment device, as a preferred embodiment, a temperature detection element (for example, a temperature sensor, not shown in fig. 1) is also arranged at the outlet of the cooling bin 5, and the temperature detection element and the cooling water control valve are connected with an electrical control system, and are used for collecting temperature data of cooled residues and transmitting the temperature data to the electrical control system, and the electrical control system sends a corresponding control instruction to the cooling water control valve according to the set cooling temperature.
The continuous steel rolling oil sludge pyrolysis carbonization treatment device further comprises a flue gas waste heat boiler, a low-temperature flue gas treatment device and an induced draft fan as a preferred embodiment, wherein the flue gas waste heat boiler is connected with a smoke outlet 10 of the heating furnace; the low-temperature flue gas treatment device is connected with the smoke outlet of the flue gas waste heat boiler, and the exhaust port of the low-temperature flue gas treatment device is connected with the induced draft fan. In a preferred embodiment of the invention, the low-temperature flue gas treatment device comprises a bag-type dust removal device and an activated carbon filtering device. High-temperature flue gas in a hearth 13 of the heating furnace enters a flue gas waste heat boiler through a smoke outlet 10, the high-temperature flue gas is cooled in the waste heat boiler, the heat of the high-temperature flue gas is converted and utilized, and the output low-temperature flue gas (the temperature is less than or equal to 200 ℃) enters a subsequent flue gas treatment device and is treated by a cloth bag dust removal device and an active carbon filter device to reach the standard and then is discharged. All the flue gas is discharged under the action of the draught fan, and the hearth 13 of the heating furnace, the flue gas waste heat boiler and the flue gas treatment device are all provided with a certain negative pressure under the action of the draught fan.
A continuous steel rolling oil sludge pyrolysis carbonization treatment method is implemented by adopting the continuous steel rolling oil sludge pyrolysis carbonization treatment device, and sequentially comprises the following steps:
preheating: starting heating equipment for heating, and when the pyrolysis carbonization bin 2 reaches a preset temperature, starting inputting oil sludge into the pyrolysis carbonization bin by feeding equipment for treatment;
and (3) pyrolysis and carbonization steps: carrying out pyrolysis carbonization treatment on the oil sludge in the pyrolysis carbonization bin under the continuous transmission of the material conveying mechanism at a preset temperature;
and a residue cooling step: cooling the residue obtained in the step of pyrolysis and carbonization in a cooling bin, and then discharging;
a gas treatment step: and (4) carrying out combustion treatment on the gas obtained in the step of pyrolysis and carbonization, and then discharging.
In the above method, as a preferred embodiment, the predetermined temperature is 800-; the period of the pyrolysis and carbonization treatment is 12-18min (such as 13min, 14min, 15min, 16min and 17min) (i.e. the time from the time when the oil sludge enters the pyrolysis and carbonization bin 2 to the time when the oil sludge is discharged out of the pyrolysis and carbonization bin 2).
In the above method, as a preferred embodiment, in the step of pyrolysis and carbonization, the volume ratio of the combustible gas generated in the pyrolysis and carbonization bin to the introduced air is 1:10-15 (e.g. 1:11, 1:12, 1:13, 1: 14). In the step of gas treatment, the combustion treatment is to introduce air into the heating furnace, so that the air is mixed with the gas obtained in the step of pyrolysis and carbonization to realize combustion of the combustible gas, the volume ratio of the introduced air to the combustible gas generated in the pyrolysis and carbonization bin is 10-15:1, and the air introduced from the outside in the ratio can better ensure sufficient combustion of the combustible gas and ensure that the temperature in the heating furnace is maintained within the temperature range required by pyrolysis and carbonization of the oil sludge.
In the method, as a preferred embodiment, in the pyrolysis carbonization step, the rotation speed of the material conveying mechanism is variable-frequency adjustable within a range of 0-40 r/min (such as 2r/min, 5r/min, 10r/min, 15r/min, 20r/min, 25r/min, 30r/min, 35r/min, 38r/min), and is generally controlled to be about 20r/min according to actual conditions; preferably 18-22 r/min.
In the above method, as a preferred embodiment, in the residue cooling step, the residue is discharged after the temperature of the residue is lowered to 60 ℃ to 120 ℃ (e.g., 62 ℃, 65 ℃, 80 ℃, 100 ℃, 110 ℃, 115 ℃, 118 ℃).
In the above method, as a preferred embodiment, in the residue cooling step, the rotation speed of the material conveying mechanism is variable-frequency adjustable within a range of 5-15r/min (e.g. 6r/min, 8r/min, 10r/min, 12r/min, 14r/min), and is generally controlled to be about 10r/min according to actual conditions.
In the above method, as a preferred embodiment, the method further includes: recovering the waste heat generated in the pyrolysis carbonization step and the waste heat generated in the gas treatment step; and a step of purifying the low-temperature flue gas generated after the gas waste heat in the gas treatment step is recovered, wherein the low-temperature flue gas is discharged after reaching the standard.
By adopting the device, the oil sludge pyrolysis carbonization treatment capacity is set according to the actual treatment requirement, under the normal condition, the oil sludge treatment capacity is 3-5 tons/day, and the residue yield is about 120-192 Kg/day.
Examples
The structure of the continuous steel rolling oil sludge pyrolysis carbonization treatment device provided by the preferred embodiment is shown in fig. 1, and the device comprises:
the feeding equipment comprises a feeding pipe 1, one end of the feeding pipe is connected with an external screw pump and used for inputting materials (steel rolling oil sludge) to the pyrolysis carbonization bin 2, and the other end of the feeding pipe 1 is connected with an inlet of the pyrolysis carbonization bin 2.
Pyrolysis carbonization equipment includes: pyrolysis and carbonization storehouse 2, material conveying mechanism and firing equipment.
The number of the pyrolysis carbonization bins 2 is 4, the inlet of the first pyrolysis carbonization bin 21 is connected with the feeding pipe 1, the solid material outlet of the first pyrolysis carbonization bin 21 is connected with the inlet of the second pyrolysis carbonization bin 22, the solid material outlet of the second pyrolysis carbonization bin 22 is connected with the inlet of the third pyrolysis carbonization bin 23, and the solid material outlet of the third pyrolysis carbonization bin 23 is connected with the inlet of the fourth pyrolysis carbonization bin 24; an outlet of the fourth pyrolysis carbonization bin 24 is connected with cooling equipment; in order to save the field and miniaturize the device, all the pyrolysis carbonization bins 2 are arranged in parallel up and down.
The material conveying mechanism is arranged inside each pyrolysis carbonization bin 2, a spiral conveying shaft is specifically adopted, the spiral conveying shaft is connected with an external motor and moves under the driving of the motor, and therefore the overturning and conveying work of the oil sludge is completed.
The heating device adopts gas heating (the gas is natural gas specifically), the heating component is a heating furnace, and the heating furnace as a whole is arranged outside the 4 pyrolysis carbonization bins 2 in a surrounding manner; a shell 3 of the heating furnace is provided with a gas inlet, a smoke outlet 10 and an ash removal port 8; wherein, the gas inlet is arranged below the heating furnace, the gas inlet is provided with a burner 9 (namely a heating source) to provide heat for the hearth 13 of the heating furnace, and the working state of the burner 9 is controlled by a switch valve; the ash cleaning port 8 is also arranged below the heating furnace and is used for periodically and irregularly cleaning ash by manpower; the smoke outlet 10 is arranged above the heating furnace and used for discharging high-temperature smoke in a hearth of the heating furnace.
The cooling equipment comprises a cooling bin 5 which is horizontally arranged and is hollow tubular inside and a cooling assembly arranged outside the cooling bin; the cooling component is a cooling water tank 6; the entry end of cooling bin 5 has the entry, through the exit linkage of pipeline with fourth pyrolysis carbonization storehouse, is equipped with high temperature rotary valve 4 on the pipeline (refer to fig. 1, high temperature rotary valve 4 sets up in the outside of the casing 3 of heating furnace), and the exit end lower part of cooling bin 5 is equipped with discharge gate 7, and cooling bin 5 is inside still to be equipped with the auger delivery axle.
The combustible gas treatment equipment comprises a burner nozzle 12, a ventilation pipeline and a combustion fan 11; the burner 12 is a sleeve structure, and includes a flow guide pipe 121 and a burner tube 122 sleeved outside the outlet end of the flow guide pipe; the draft tube 121 is connected with a gas outlet of the pyrolysis carbonization bin 2 and is used for outputting gas (containing combustible gas) generated by pyrolysis carbonization treatment in the pyrolysis carbonization bin 2 to the combustion tube 122; one end of the combustion tube 122 is communicated with the ventilation duct to receive the air input from the combustion fan 11, and the other end is an outlet end, the opening direction of the combustion tube 122 is consistent with the opening direction of the outlet end of the flow guide tube, but the outlet end of the combustion tube 122 protrudes a distance beyond the outlet end of the flow guide tube 121 sleeved in the combustion tube 122 to form a place for combustion treatment. In this embodiment, since four pyrolysis carbonization chambers 2 are arranged in the furnace chamber 13, correspondingly, 4 burners 12 are also arranged, specifically, a gas outlet at the upper part of each pyrolysis carbonization chamber 2 is connected with a flow guide pipe 121, and a combustion pipe 122 is sleeved outside an outlet end of each flow guide pipe 121; one end of each combustion pipe 122 is communicated with the ventilation pipe, the other end of the ventilation pipe is connected with an external combustion fan 11, all combustion burners 12 are positioned in a hearth 13 of the heating furnace, and the generated high-temperature flue gas can be used as supplement of the high-temperature flue gas generated by combustion of fuel gas to provide heat for pyrolysis and carbonization treatment in the pyrolysis and carbonization bin 2.
The temperature sensor is arranged on the pyrolysis carbonization bin 2 and used for collecting temperature data in the pyrolysis carbonization bin 2, and the temperature sensor is connected with the electrical control system and used for transmitting the collected temperature data to the electrical control system; when the temperature detected by the temperature sensor is lower than the set temperature of the electric control system, the electric control system sends an instruction to start the heating equipment to heat and supplement heat; when the temperature detected by the temperature sensor is higher than the set temperature of the electric control system, the electric control system sends an instruction to close the electric heating equipment to stop heating, and the cabin performs self-circulation reaction.
The flue gas waste heat boiler is connected with a smoke outlet 10 of the heating furnace and used for cooling high-temperature flue gas exhausted from the heating furnace and converting heat of the flue gas waste heat boiler into hot water or steam for utilization.
Further comprising: the low-temperature flue gas treatment device is a tail gas treatment system formed by cloth bag dust removal and activated carbon filtration, and is mainly used for filtering low-temperature flue gas (the temperature is less than or equal to 200 ℃) output by a flue gas waste heat boiler; the draught fan leads the hearth 13 of the heating furnace, the flue gas waste heat boiler and the flue gas treatment device to have certain negative pressure, and discharges the flue gas which reaches the standard in treatment.
Referring to fig. 3, the operation of the above-described apparatus is as follows:
1) preheating: firstly, setting a preheating temperature to 850 ℃ through an electrical control system, starting a burner 9 for preheating, and producing after the preset temperature is reached;
2) feeding: sending oil sludge to be treated into a pyrolysis carbonization bin 2 through a feeding pipe 1;
3) pyrolysis and carbonization: the oil sludge entering the pyrolysis carbonization bin 2 turns over and moves forward under the action of the spiral conveying shaft, and the oil sludge starts to be decomposed in an oxygen-free high-temperature environment to generate combustible gas (and other gases) and residues. In the step, the carbonization temperature is 850 ℃, the pyrolysis carbonization time is about 15min, namely the time of the oil sludge from entering the first pyrolysis carbonization bin to being discharged from the fourth pyrolysis carbonization bin is about 15min, the treatment capacity is 3 tons/day, namely about 130 Kg/h, and the spiral rotation speed is adjusted to 15 r/min.
4) And (3) cooling: the residue generated by pyrolysis and carbonization enters the cooling bin 5 through the solid material outlet of the fourth pyrolysis and carbonization bin through the second rotary valve 4, the second rotary valve 4 is used for driving the residue to rotate through the motor to send the residue into the cooling bin 5, the pyrolysis and carbonization bin can be isolated from the outside air, oxygen is prevented from entering, and meanwhile, the heat in the heating furnace can be kept; the residue is turned over and moves forward under the action of the spiral conveying shaft in the cooling bin 5, the cooling bin 5 is provided with a circulating cooling water tank 6, the temperature of the residue is reduced to about 100 ℃, and the residue is discharged through a discharge port 7 and is received by a container. In this embodiment, the cooling throughput is approximately 8Kg/h and the screw rotation speed is 10r/min, corresponding to the residue yield obtained in the above-mentioned pyrolysis and carbonization steps.
5) At the moment, positive pressure is formed in the pyrolysis carbonization bin 2, gas (containing combustible gas) is generated by pyrolysis carbonization treatment and enters the combustion pipe 122 through the guide pipe 121, air is sent into the combustion pipe 122 through the ventilating duct by the combustion fan 11 and is sprayed out at high speed from an intermediate interlayer space between the combustion pipe 122 and the guide pipe 121 to form a siphoning effect on the combustible gas in the intermediate core layer, the combustible gas is driven to flow out of the guide pipe 121 and is mixed with the air, combustion is performed under the high-temperature effect, after full combustion, the flue gas is discharged out of the combustion nozzle 12 and enters the hearth 13 of the heating furnace, then the flue gas is sent into a flue gas waste heat boiler along with the high-temperature flue gas in the hearth 13 through the smoke outlet 10 for waste heat recovery, then the low-temperature flue gas enters the low-temperature flue gas treatment device.
The continuous steel rolling oil sludge pyrolysis and carbonization treatment device provided by the embodiment performs treatment experiments on steel rolling oil sludge of an emulsion filtering system of the continuous steel rolling oil sludge on the site of a Shandonghua 1450 rolling mill, the results are shown in table 1, the data in the table can show that a good effect is obtained, the steel rolling oil sludge can be continuously pyrolyzed and carbonized completely, and the purpose of absolute reduction of hazardous wastes is achieved (the residue is only 4-10% of the weight of crude oil sludge). The treated residue mainly contains carbon, ferric oxide and inorganic impurities.
TABLE 1 results of treatment experiments using the apparatus provided in the preferred embodiment of the invention
The above embodiment is an exemplary experimental apparatus of the continuous steel rolling oil sludge pyrolysis carbonization treatment apparatus provided by the invention, and the daily treatment capacity is about 3 tons of steel rolling oil sludge. The device with different output can be designed according to different requirements, wherein some process parameters such as spiral rotating speed, treatment capacity and the like can be adjusted according to equipment, materials, processes and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a continuous type steel rolling fatlute pyrolysis carbonization processing apparatus which characterized in that, the device includes:
a feeding device;
pyrolysis carbonization equipment includes: the device comprises a pyrolysis carbonization bin, a material conveying mechanism and heating equipment; the pyrolysis carbonization bin is connected with the feeding equipment and is a place for receiving the materials from the feeding equipment and performing pyrolysis carbonization treatment on the materials; the material conveying mechanism is arranged in the pyrolysis carbonization bin and is used for conveying the materials in the pyrolysis carbonization bin from the input end to the output end; the heating equipment is used for maintaining the temperature required by the reaction in the pyrolysis carbonization bin;
the cooling equipment is connected with the solid material outlet of the pyrolysis carbonization equipment and is used for cooling the residue discharged by the pyrolysis carbonization equipment;
and the combustible gas treatment equipment is connected with the gas outlet of the pyrolysis carbonization equipment and is used for carrying out combustion treatment on the gas discharged by the pyrolysis carbonization equipment.
2. The continuous steel rolling oil sludge pyrolysis carbonization treatment device according to claim 1, wherein the feeding equipment comprises a screw pump and a feeding pipe, and the screw pump is connected with an inlet of the pyrolysis carbonization equipment through the feeding pipe.
3. The continuous steel rolling oil sludge pyrolysis carbonization treatment device according to claim 1 or 2, wherein the cooling equipment comprises a cooling bin and a cooling assembly; the cooling bin comprises a cooling bin body, an inlet end and an outlet end; the interior of the cooling bin body is in a hollow tubular shape; the upper part of the inlet end of the cooling bin is provided with an inlet which is connected with a solid material outlet of the pyrolysis carbonization equipment; a discharge hole is formed in the lower part of the outlet end of the cooling bin; the cooling assembly is arranged outside the cooling bin body, and a water inlet of the cooling assembly is connected with cooling water supply equipment through a cooling water control valve;
preferably, a material conveying mechanism is arranged inside the cooling bin and used for conveying residues from an inlet of the cooling bin to a discharge hole of the cooling bin;
more preferably, a high-temperature rotary valve is arranged at the joint of the pyrolysis carbonization equipment and the cooling bin.
4. The continuous steel rolling oil sludge pyrolysis and carbonization treatment device according to any one of claims 1 to 3, wherein the combustible gas treatment equipment comprises: the combustion nozzle, the ventilation pipeline and the combustion-supporting fan; wherein,
the burner nozzle comprises a flow guide pipe and a combustion pipe sleeved outside the outlet end of the flow guide pipe; the guide pipe is connected with a gas outlet of the pyrolysis carbonization bin; one end of the combustion pipe is communicated with the ventilation pipeline, the opening direction of the other end of the combustion pipe is consistent with the outlet direction of the flow guide pipe, and the other end of the combustion pipe protrudes out of the outlet end of the flow guide pipe by a certain distance to form a combustion treatment place; and the combustion-supporting fan supplies air to the combustion pipe through a ventilation pipeline.
5. The continuous steel rolling oil sludge pyrolysis carbonization treatment device according to any one of claims 1 to 4, wherein the material conveying mechanism is a screw conveying shaft; preferably, 2-5 pyrolysis carbonization bins are arranged, and along the advancing direction of the materials, the solid material outlet of each front pyrolysis carbonization bin is connected with the inlet of the next pyrolysis carbonization bin; a material conveying mechanism is arranged in each pyrolysis carbonization bin;
more preferably, the pyrolysis carbonization equipment is provided with 4 pyrolysis carbonization bins, wherein an inlet of a first pyrolysis carbonization bin is connected with the feeding equipment, a solid material outlet of the first pyrolysis carbonization bin is connected with an inlet of a second pyrolysis carbonization bin, a solid material outlet of the second pyrolysis carbonization bin is connected with an inlet of a third pyrolysis carbonization bin, and a solid material outlet of the third pyrolysis carbonization bin is connected with an inlet of a fourth pyrolysis carbonization bin; an outlet of the fourth pyrolysis carbonization bin is connected with the cooling equipment; further preferably, each pyrolysis carbonization bin is arranged in parallel up and down.
6. The continuous steel rolling oil sludge pyrolysis and carbonization treatment device according to any one of claims 1 to 5, wherein the heating equipment comprises a heating assembly, a heating source connected with the heating assembly, and a switch valve for controlling whether the heating source is heated or not.
7. The continuous steel rolling oil sludge pyrolysis carbonization treatment device according to claim 6, wherein the heating component is a resistance wire which is arranged around the outside of the pyrolysis carbonization bin; preferably, the heating assembly further comprises a heating pipeline, the heating pipeline is arranged outside the pyrolysis carbonization bin in a surrounding mode, and the heating pipeline is communicated with the burner tip so as to transmit heat generated by combustion of flue gas to the pyrolysis carbonization bin through the heating pipeline;
or,
the heating assembly is a heating furnace, the heating furnace is arranged outside all the pyrolysis carbonization bins in a surrounding manner, and a shell of the heating furnace is at least provided with a gas inlet, a smoke outlet and an ash cleaning port; the gas inlet is arranged below the heating furnace, a burner is arranged at the gas inlet, and a switch valve is arranged on the burner; the ash removing port is arranged below the heating furnace; the smoke outlet is arranged above the heating furnace and used for discharging high-temperature smoke; preferably, the burner tip is located inside the heating furnace.
8. The continuous steel rolling oil sludge pyrolysis and carbonization treatment device according to any one of claims 1 to 7, further comprising: a temperature sensing element and an electrical control system; wherein,
the temperature detection element is arranged on the pyrolysis carbonization bin, is connected with the electrical control system, and is used for collecting temperature data and transmitting the temperature data to the electrical control system;
the electric control system is at least connected with the temperature detection element and the switch valve of the heating equipment and is used for receiving the temperature data transmitted by the temperature detection element and sending an instruction to control the working state of the heating equipment according to a comparison result of the temperature data and the set temperature; preferably, when the temperature data transmitted by the temperature detection element reaches the set temperature of the electric control system, the electric control system sends out an instruction for turning off the heating equipment; when the temperature data transmitted by the temperature detection element does not reach the set temperature of the electric control system, the electric control system sends out an instruction for opening the heating equipment;
preferably, the electrical control system is further connected with at least one of the high-temperature rotary valve, a motor for controlling the operation of the material conveying mechanism arranged in the pyrolysis carbonization bin, a motor for controlling the operation of the material conveying mechanism arranged in the cooling bin, and the cooling water control valve, so as to regulate and control corresponding components;
more preferably, a temperature detection element is also arranged at an outlet of the cooling bin, the temperature detection element and the cooling water control valve are connected with the electrical control system, and are used for collecting temperature data of cooled residues and transmitting the temperature data to the electrical control system, and the electrical control system sends a corresponding regulation and control instruction to the cooling water control valve according to a set cooling temperature;
further preferably, the electrical control device is a PLC control system, and the temperature detection element is a temperature sensor.
9. The continuous steel rolling oil sludge pyrolysis and carbonization treatment device according to any one of claims 1 to 8, further comprising: the system comprises a flue gas waste heat boiler, a low-temperature flue gas treatment device and a draught fan; the flue gas waste heat boiler is connected with a smoke outlet of the heating furnace; the low-temperature flue gas treatment device is connected with a smoke outlet of the flue gas waste heat boiler, and an exhaust port of the low-temperature flue gas treatment device is connected with the induced draft fan; preferably, the low-temperature flue gas treatment device comprises a cloth bag dust removal device and an activated carbon filtering device.
10. A continuous steel rolling oil sludge pyrolysis carbonization treatment method is characterized by being implemented by adopting the continuous steel rolling oil sludge pyrolysis carbonization treatment device of any one of claims 1 to 9, and sequentially comprising the following steps of:
preheating: starting the heating equipment for heating, and when the pyrolysis carbonization bin reaches a preset temperature, starting inputting oil sludge into the pyrolysis carbonization bin for treatment by the feeding equipment;
and (3) pyrolysis and carbonization steps: carrying out pyrolysis and carbonization treatment on the oil sludge in the pyrolysis and carbonization bin under the continuous transmission of the material conveying mechanism;
and a residue cooling step: cooling the residue obtained in the step of pyrolysis and carbonization in the cooling bin, and then discharging;
a gas treatment step: and (4) carrying out combustion treatment on the gas obtained in the step of pyrolysis and carbonization, and then discharging.
Preferably, the predetermined temperature is 800-; the period of the pyrolysis carbonization treatment is 12-18 min;
preferably, in the step of pyrolysis and carbonization, the volume ratio of combustible gas generated in the pyrolysis and carbonization bin to the introduced air is 1: 10-15;
preferably, in the residue cooling step, the temperature of the residue is reduced to 60-120 ℃ and then the residue is discharged;
preferably, in the step of pyrolysis and carbonization, the rotating speed of the material conveying mechanism is 0-40 r/min; more preferably 18-22 r/min; in the residue cooling step, the rotating speed of the material conveying mechanism is 5-15 r/min; more preferably 10 r/min;
further preferably, the method for the pyrolysis and carbonization treatment of the continuous steel rolling oil sludge further comprises the following steps: the waste heat of the pyrolysis carbonization step and the flue gas waste heat of the gas treatment step are recovered; and a step of treating the low-temperature flue gas generated after the flue gas waste heat is recovered, wherein the low-temperature flue gas is treated to reach the standard and then is discharged.
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