CN108838194B - Harmless continuous treatment system for oily solid waste - Google Patents
Harmless continuous treatment system for oily solid waste Download PDFInfo
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- CN108838194B CN108838194B CN201810691232.4A CN201810691232A CN108838194B CN 108838194 B CN108838194 B CN 108838194B CN 201810691232 A CN201810691232 A CN 201810691232A CN 108838194 B CN108838194 B CN 108838194B
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- 239000002910 solid waste Substances 0.000 title claims abstract description 83
- 239000000463 material Substances 0.000 claims abstract description 64
- 238000010926 purge Methods 0.000 claims abstract description 55
- 238000007670 refining Methods 0.000 claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 238000009833 condensation Methods 0.000 claims abstract description 24
- 230000005494 condensation Effects 0.000 claims abstract description 24
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 239000011343 solid material Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 261
- 239000007789 gas Substances 0.000 claims description 116
- 239000000428 dust Substances 0.000 claims description 58
- 238000010408 sweeping Methods 0.000 claims description 35
- 238000003860 storage Methods 0.000 claims description 25
- 239000000654 additive Substances 0.000 claims description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 230000000996 additive effect Effects 0.000 claims description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 238000009826 distribution Methods 0.000 claims description 18
- 239000003546 flue gas Substances 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 15
- 238000011068 loading method Methods 0.000 claims description 12
- 239000002199 base oil Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 239000003345 natural gas Substances 0.000 claims description 10
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 claims description 4
- 238000002309 gasification Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000009834 vaporization Methods 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000004821 distillation Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000010731 rolling oil Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- 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
- B01D53/002—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 condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Dispersion Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides an oil-containing solid waste harmless continuous treatment system which comprises a feeding system, an oil-containing solid waste oil recovery system, a fractional condensation recovery system, an oil-containing solid waste refining system, a finished oil treatment system, a material treatment system and a tail gas treatment system, wherein raw materials are conveyed to the oil-containing solid waste oil recovery system by the feeding system, the oil-containing solid waste oil recovery system is a rotary roasting furnace heating system, oil steam from the oil-removal system enters the finished oil treatment system after passing through the fractional condensation recovery system, the fractional condensation recovery system comprises a first-stage condenser, a second-stage condenser and a finished oil cooler, solid materials from the oil-removal system enter the oil-containing solid waste refining system to further reduce the oil content of the materials, the oil-containing solid waste refining system is a purging system, the materials enter the material treatment system after passing through the oil-containing solid waste refining system, and purge tail gas of the oil-containing solid waste refining system and noncondensable gas at an outlet of the fractional condensation recovery system enter a combustion chamber of the rotary roasting furnace to be combusted.
Description
Technical Field
The invention belongs to the technical field of waste treatment, and particularly relates to an oil-containing solid waste harmless continuous treatment system.
Background
With the development of scientific technology, the industry is increasingly popular, the environmental protection awareness of the country and the public in the industrial production is stronger, and the environmental protection requirement is higher. Harmless treatment and recycling of various solid hazardous wastes in industrial production are environmental protection problems which are urgently needed to be solved.
Oil-containing solid wastes are generated in various industries, such as oil-containing diatomite for oil filtration in nonferrous metal processing industry, oil-containing soil in petroleum exploitation industry, oil-containing sludge generated in petroleum refining industry, etc., and are listed in the national hazardous waste directory HW 08.
In the prior art, the treatment of the oily solid waste is mainly carried out by the following method: the mechanical squeezing method is characterized in that a part of oil is squeezed out by applying larger squeezing force to the oil-containing solid waste, but the compressibility of most of the oil-containing solid waste is not strong, the effect is not obvious, and harmless treatment cannot be achieved; the sulfuric acid pickling method adopts sulfuric acid solution to perform pickling, has complex structure and high cost, can separate oil, but the generated acidic substances still cause environmental pollution, and the efficiency is low; the steam heating oil extraction method has the advantages that when the steam temperature is low, the treatment efficiency is low, the high-boiling-point oil cannot be extracted, when the steam temperature is high, a high-pressure steam boiler is matched, the structure is complex, and the economic benefit is poor; CN104059761 discloses an electromagnetic vortex heating oil extraction, which adopts electric heating oil extraction under a negative pressure working condition, and the method has low heat efficiency due to external electric heating, and meanwhile, oil steam contains a large amount of dust under a negative pressure state, and a subsequent treatment system is complex. The existing drying or roasting device is provided with a carrier gas which is introduced to reduce the partial pressure of oil gas so as to obtain a material with low oil content. Therefore, it is important to develop a novel energy-saving continuous oil-containing solid waste treatment process with simple flow.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a harmless continuous treatment system for solid waste containing oil.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides an oily solid waste innocuous continuous treatment system, includes charging system, oily solid waste oil system, fractional condensation recovery system, oily solid waste refining system, finished product oil processing system, material processing system, tail gas processing system, and the charging system carries the raw materials to oily solid waste oil system, oily solid waste oil system is rotary roasting furnace heating system, gets into the finished product oil processing system after the oily steam that comes out from oily solid waste oil system through fractional condensation recovery system, fractional condensation recovery system includes first order condenser, second order condenser and finished product oil cooler, and the solid material that comes out from oily solid waste oil system gets into the oily solid waste refining system in further reducing the oil content of material, oily solid waste refining system is the purge system, and the material gets into material processing system after the oily solid waste refining system, and the combustion is carried out in the combustion chamber of rotary roasting furnace in the purge tail gas of oily solid waste refining system and the non-condensable gas of fractional condensation recovery system export.
The feeding system comprises a raw material bin, wherein the raw material bin is a semi-underground material bin, a feeding screw conveyer is arranged at the lower part of the raw material bin and controlled by a variable frequency motor to adjust the feeding amount, the feeding screw conveyer is connected with a pipe chain conveyer, raw materials are lifted to a buffering feed hopper of the oil-containing solid waste oil system through the pipe chain conveyer, a gate valve and the feeding screw conveyer are arranged at the lower part of the buffering feed hopper, and the raw materials are conveyed to the oil-containing solid waste oil system through the feeding screw conveyer.
The rotary roasting furnace body of the oil-containing solid-waste oil removing system is provided with three combustion chambers, each combustion chamber is provided with six burners, every two burners are in a group, and the furnace body is divided into three sections, including a heating section, an oil gasification section and a high-temperature roasting section.
The heat source in the rotary roasting furnace is natural gas, a part of high-temperature flue gas after natural gas combustion is blown back into the combustion chamber by the circulating fan to reuse the latent heat of the high-temperature flue gas, a part of the high-temperature flue gas is discharged into the atmosphere through the induced draft fan after fresh air led by the combustion-supporting fan is heated by the air preheater, the heated fresh air enters the combustion chamber, and a part of the high-temperature flue gas is used as purge gas to enter the oil-containing solid waste refining system.
Oil steam from the rotary roasting furnace cylinder enters a first-stage condenser after dust removal through a cyclone separator, an oil-gas mixture condensed through the first-stage condenser enters an additive oil storage tank, liquid additive oil in the additive oil storage tank is separated, oil gas is discharged from the top and enters a second-stage condenser, after being cooled through the second-stage condenser, base oil in the oil gas is condensed and enters a finished oil cooler, and after passing through the finished oil cooler, the finished oil is cooled to normal temperature.
The primary condenser is a vertical shell-and-tube heat exchanger, the oil vapor passes through a tube pass, the cold medium passes through a shell pass, the cold medium is fresh air blown in by a blower, the condensation temperature of the primary condenser is controlled to be 250 ℃, the secondary condenser is a horizontal U-shaped tube heat exchanger, the condensation temperature of the secondary condenser is controlled to be 120 ℃, the finished oil cooler is a horizontal U-shaped tube heat exchanger, and the secondary condenser and the finished oil cooler are arranged in an up-and-down overlapping mode.
The finished oil treatment system comprises a finished oil storage and loading system, the finished oil flows into a finished oil middle tank after passing through a finished oil cooler, the finished oil in the finished oil middle tank is pumped into the finished oil tanks by the finished oil pump, the finished oil tanks are double-layer buried tanks, each finished oil tank is provided with a finished oil loading pump, and the finished oil loading pumps are oil-submerged pumps.
The material discharged from the discharge end of the rotary roasting furnace enters an oil-containing solid waste refining system through a rotary discharge valve, the oil-containing solid waste refining system comprises a blowing device, a blowing gas cooler and a blowing gas dust remover, the blowing gas is high-temperature flue gas generated after natural gas in the combustion chamber of the rotary roasting furnace burns, inert gas and a small amount of oil vapor from the blowing device and trace dust carried by the blowing gas enter the blowing gas cooler, the gas is cooled to below 200 ℃ by circulating cooling water and enters the blowing gas dust remover, and the dust is trapped in the blowing gas dust remover.
The material processing system comprises a material cooling, conveying, storing and packaging system, solid materials discharged from a blowing device and dust discharged from a blowing gas dust remover flow into a roller cold material machine together, the materials are cooled to normal temperature by circulating cooling water and then discharged from a discharge end of the roller cold material machine into a pipe chain conveyor, the cooled materials are lifted to a storage bin by the pipe chain conveyor, the dust of the bag dust remover during discharging is absorbed by the pipe chain conveyor at the top of the storage bin, a ton packing machine is arranged at the lower part of the storage bin, and qualified materials after oil removal are loaded into the ton packing machine for recycling.
The noncondensable gas at the outlets of the secondary condenser and the finished oil condenser and the gas containing trace oil vapor in the sweeping gas dust remover are discharged from the upper part and recycled into the combustion chamber of the rotary roasting furnace.
The invention has the beneficial effects that: the invention provides an oil-containing solid waste harmless continuous treatment system, which can realize the harmless treatment of the oil-containing solid waste, so that solid materials are regenerated and can be recycled, the oil in the oil-containing solid waste is purified in a grading way, the oil-containing solid waste harmless treatment integrated process can meet the requirements of aluminum profile processing enterprises and oil processing enterprises on the harmless treatment of the oil-containing solid waste, and simultaneously refined oil and refined solid materials can be recycled, so that the oil-containing solid waste is harmless and recycled.
Drawings
FIG. 1 is a process flow diagram of a harmless continuous treatment system for oily solid waste.
Fig. 2 is a schematic structural view of the purging device.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a schematic diagram of the opening of the cross section of the gas distribution pipe.
In FIG. 1, a V1-raw material bin, a V2-feed hopper, a V3-cyclone separator, a V4-additive oil storage tank, a V5-finished oil intermediate tank, a V6A/B-finished oil tank, a V7-storage bin, an E1-rotary roasting furnace, an E2-primary condenser, an E3-secondary condenser, an E4-finished oil cooler, an E5-purge gas cooler, an E6-roller cooler, an E7-air preheater, a D1-bin top dust remover, a D2-purge gas dust remover, an M1-feeding screw conveyor, an M2-pipe chain conveyor, an M3-gate valve, an M4-feeding screw conveyor, an M5-rotary discharge valve, an M6-purge device, an M7-pipe chain conveyor, an M8-ton bagging machine, a C1-combustion fan, a C2-circulating fan, a C3-induced draft fan, a C4-blower and a C5-vacuum pump; p1-finished oil pump and P2A/B-finished oil loading pump.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
The invention provides an oil-containing solid waste harmless continuous treatment system, which is shown in fig. 1, and comprises a feeding system, an oil-containing solid waste oil recovery system, a fractional condensation recovery system, an oil-containing solid waste refining system, a finished oil treatment system, a material treatment system and a tail gas treatment system, wherein the feeding system conveys raw materials to the oil-containing solid waste oil system, the oil-containing solid waste oil system is a rotary roasting furnace heating system, oil vapor coming out of the oil-containing solid waste oil system enters the finished oil treatment system after passing through the fractional condensation recovery system, the fractional condensation recovery system comprises a first-stage condenser, a second-stage condenser and a finished oil cooler, solid materials coming out of the oil-containing solid waste oil system enter the oil-containing solid waste refining system to further reduce the oil content of the materials, the oil-containing solid waste refining system is a purging system, and the materials enter the material treatment system after passing through the oil-containing solid waste refining system, and the tail gas coming out of the oil-containing solid waste refining system and non-condensable gas coming out of the fractional condensation recovery system enter a combustion chamber of the rotary roasting furnace to be combusted.
The feeding system comprises a raw material bin V1, wherein the raw material bin V1 is a semi-underground bin, a feeding screw conveyer M1 is arranged at the lower part of the raw material bin V1, the feeding screw conveyer M1 is controlled by a variable frequency motor to adjust feeding quantity, the feeding screw conveyer M1 is connected with a pipe chain conveyer M2, raw materials are lifted to a buffer feed hopper V2 of the oil-containing solid waste oil system through the pipe chain conveyer M2, a gate valve M3 and a feeding screw conveyer M4 are arranged at the lower part of the buffer feed hopper V2, and the raw materials are conveyed to the oil-containing solid waste oil system through the feeding screw conveyer M4.
The rotary roasting furnace E1 of the oil-containing solid-waste oil removing system is provided with three combustion chambers outside the furnace body, each combustion chamber is provided with six burners, every two burners are in a group, and the furnace body is divided into three sections, including a heating section, an oil gasification section and a high-temperature roasting section.
The heat source in the rotary roasting furnace E1 is natural gas, a part of high-temperature flue gas after natural gas combustion is blown back into the combustion chamber by the circulating fan C2 to reuse the latent heat of the high-temperature flue gas, a part of the high-temperature flue gas is heated by the air preheater E7, fresh air led by the combustion-supporting fan C1 is discharged into the atmosphere by the induced draft fan C3, the heated fresh air enters the combustion chamber, and a part of the high-temperature flue gas enters the oil-containing solid waste refining system as purge gas.
Oil vapor from the cylinder of the rotary roasting furnace E1 enters a first-stage condenser E2 after dust removal through a cyclone separator V3, an oil-gas mixture condensed by the first-stage condenser E2 enters an additive oil storage tank V4, liquid additive oil is separated in the additive oil storage tank V4, oil gas is discharged from the top and enters a second-stage condenser E3, after being cooled by the second-stage condenser E3, base oil in the oil gas is condensed and enters a finished oil cooler E4, and after passing through the finished oil cooler E4, the finished oil is cooled to normal temperature.
The primary condenser E2 is a vertical shell-and-tube heat exchanger, the oil vapor passes through a tube pass, the cold medium passes through a shell pass, the cold medium is fresh air blown in by a blower C4, the condensation temperature of the primary condenser E2 is controlled to be 250 ℃, the secondary condenser E3 is a horizontal U-shaped tube heat exchanger, the condensation temperature of the secondary condenser E3 is controlled to be 120 ℃, the finished oil cooler E4 is a horizontal U-shaped tube heat exchanger, and the secondary condenser E3 and the finished oil cooler E4 are arranged in an up-and-down overlapping mode.
The finished oil treatment system comprises a finished oil storage and loading system, the finished oil flows into a finished oil intermediate tank V5 after passing through a finished oil cooler E4, the finished oil in the finished oil intermediate tank V5 is pumped into a finished oil tank V6A/B by a finished oil pump P1, the finished oil tanks V6A/B are double-layer buried tanks, a finished oil loading pump P2 is arranged on each finished oil tank V6A/B, and the finished oil loading pump P2 is an oil immersed pump.
The materials discharged from the discharge end of the rotary roasting furnace E1 enter an oil-containing solid waste refining system through a rotary discharge valve M5, the oil-containing solid waste refining system comprises a sweeping device M6, a sweeping gas cooler E5 and a sweeping gas dust remover D2, sweeping gas is high-temperature flue gas generated by natural gas combustion in a combustion chamber of the rotary roasting furnace E1, inert gas and a small amount of oil vapor from the sweeping device and trace dust carried by the sweeping gas enter the sweeping gas cooler E5, circulating cooling water cools the gas to a temperature below 200 ℃ and enters the sweeping gas dust remover D2, and dust is trapped in the sweeping gas dust remover D2.
The material processing system comprises a material cooling, conveying, storing and packaging system, solid materials discharged from a blowing device M6 and dust discharged from a blowing gas dust remover D2 flow into a roller cold material machine E6 together, the materials are cooled to normal temperature by circulating cooling water and then discharged from a discharge end of the roller cold material machine E6 into a pipe chain conveyor M7, the cooled materials are lifted to a storage bin V7 by the pipe chain conveyor M7, a cloth bag dust remover D1 is arranged on the top of the storage bin V7 to absorb the dust when the pipe chain conveyor M7 discharges, a ton packing machine M8 is arranged at the lower part of the storage bin V7, and qualified materials after oil removal are loaded into the ton packing machine M8 for recycling.
The noncondensable gas at the outlets of the secondary condenser E3 and the finished oil condenser E4 and the gas containing trace oil vapor in the purge gas dust remover D2 are discharged from the upper part and recycled into the combustion chamber of the rotary roasting furnace E1.
The oil-containing solid waste refining system comprises a sweeping device M6, a sweeping gas cooler E5 and a sweeping gas dust remover D2, wherein the sweeping device M6 comprises an inclined type box body 1, a sweeping gas inlet 2 is formed in the front end of the higher side of the inclined type box body 1, a solid feeding port 3 is formed in the upper surface of the inclined type box body 1, a solid discharging port 5 is formed in the lower surface of the box body 1, a sweeping gas outlet 4 is formed in the upper surface of the box body 1, a sweeping gas cooler E5 is arranged behind the sweeping gas outlet 4, a sweeping gas dust remover D2 is arranged behind the sweeping gas cooler E5, and a solid material outlet at the lower end of the sweeping gas dust remover D2 is communicated with the solid discharging port 5 at the lower end of the sweeping device M6 through a pipeline to enter the next working procedure.
The purge gas inlet 2 is provided with a gas distribution pipe 6, four gas distribution pipes 7 are arranged on the gas distribution pipe 6, the gas distribution pipes 7 extend into the bottom of the inclined box body 1, and gas outlet micropores 8 are uniformly formed in the lower surface of the gas distribution pipes 7. As shown in fig. 4, the air outlet micropores 8 are symmetrically arranged on the surface of the semi-cylinder under the air distribution pipe 7, and on the cross section of the air distribution pipe, the included angle between the connecting line of each air outlet micropore 8 and the circle center and the vertical axis of the cross section of the air distribution pipe 7 is 45 degrees. The arrangement can ensure that the material can not block micropores and can fully fluidize the material in the whole inclined box body.
The inclination angle of the purge device box 1 is smaller than the repose angle of the processed solid material. The inclination angle of the purge device box 1 is determined according to the repose angle of the processed material, in order to ensure that the high-temperature material has enough residence time in the purge device, the inclination angle of the purge device is smaller than the repose angle of the processed material, in order to maintain certain fluidity, the inclination angle can be correspondingly increased when the repose angle is large, and the inclination angle can be properly reduced when the repose angle is small.
The lower part of the purge gas outlet 4 is provided with a conical dust hood 9, so that dust particles carried by the purge gas have enough sedimentation space in the conical dust hood 9, and the outflow of dust from the purge gas outlet 4 along with the purge gas is reduced.
The purge gas dust remover D2 is a cloth bag dust remover.
The purge gas from the outlet 4 of the purge device enters the purge gas cooler E5, and the purpose of the purge gas is to cool high-temperature inert purge gas to a temperature which can be borne by a conventional purge gas bag-type dust remover, so that the bag-type dust remover is beneficial to removing dust carried by the purge gas and reducing the manufacturing cost.
Example 1
The treatment capacity is 450kg/h of oily diatomite, the oil content of the feed is 37-46.6%, the feed temperature is 10-30 ℃, the bulk density is 0.5-0.7 g/cm 3, and the granularity is 13-42 mu m; the rolling oil consists of additive oil and base oil. Additive oil: the density (25 ℃) is 830 kg/m 3, and the distillation range is 290 ℃; base oil: the density (25 ℃) is 790 kg/m 3, and the distillation range is 230 ℃.
As shown in fig. 1, the raw materials are stored in a raw material bin V1, the raw material bin V1 is a semi-underground bin, a conical section is arranged below the raw material bin V1, a feeding screw conveyor M1 is arranged below the raw material bin V1, and a motor of the feeding screw conveyor M1 is a variable frequency motor so as to adjust the feeding amount. The feeding screw conveyor M1 discharges raw materials into the pipe chain conveyor M2, and the pipe chain conveyor M2 is selected because the pipe chain conveyor has good tightness, and no dust leakage exists in the conveying process. The pipe chain conveyor M2 lifts the raw materials into a buffer feed hopper V2 of the rotary roasting furnace E1, the materials of the buffer feed hopper enter a feeding screw conveyor M4 through a gate valve M3, and the materials entering the rotary roasting furnace E1 can be adjusted through variable frequency adjustment.
The furnace body of the rotary roasting furnace E1 is externally provided with three combustion chambers, six burners are arranged in each combustion chamber, every two burners are in a group, the furnace body is divided into three sections, namely a heating section, an oil gasification section and a high-temperature roasting section, and the temperature of each burner can be independently controlled and regulated. According to the distillation range of the rolling oil, the temperature of the hearth of the oil vaporization section is mainly controlled above the boiling point. The materials are heated rapidly in the heating section, and a small amount of oil vapor is distilled out; in the oil vaporization section, the temperature of a hearth is controlled to be 250-350 ℃, and most of base oil and additive oil are vaporized in the section within the temperature range; and the high temperature section is used for controlling the temperature of the hearth of the high temperature section to be about 450 ℃, and a small amount of base oil and additive oil which are not evaporated in the area are further heated and evaporated at high temperature, so that the liquid oil in the diatomite is ensured to be vaporized to be gaseous oil vapor after passing through the high temperature section.
The temperature of oil vapor coming out of a rotary cylinder of the rotary roasting furnace E1 is 300 ℃, the oil vapor enters a primary condenser E2 after being dedusted by a cyclone separator V3, the primary condenser E2 is a vertical shell-and-tube heat exchanger, the oil vapor passes through a tube pass, cold medium fresh air passes through a shell pass, the cold medium of the primary condenser E2 is provided by fresh air blown in by a blower C4, the condensation temperature of the primary condenser E2 is controlled to be 250 ℃, and high boiling point additive oil in oil gas is condensed. The oil-gas mixture condensed by the first-stage condenser E2 enters an additive oil storage tank V4, liquid additive oil is separated in the additive oil storage tank V4, oil gas is discharged from the top and enters a second-stage condenser E3, the second-stage condenser E3 is a horizontal U-shaped tube heat exchanger, and the condensing temperature of the second-stage condenser E3 is controlled to be 120 ℃. After being cooled by the secondary condenser E3, the base oil in the oil gas is condensed and enters the finished oil cooler E4, the finished oil cooler E4 is a horizontal U-shaped tube heat exchanger, and after passing through the finished oil cooler E4, the finished oil is cooled to normal temperature. The secondary condenser E3 and the product oil cooler E4 are arranged one above the other, which contributes to gravity-assisted gravity flow of condensate.
The product oil passing through the product oil cooler E4 flows into the product oil intermediate tank V5 by gravity, and the product oil in the product oil intermediate tank V5 is pumped into the product oil tank V6A/B by the product oil pump P1. The product oil tanks V6A/B are double-layer buried tanks, each product oil tank is provided with a product oil loading pump P2A/B, and the product oil loading pumps P2A/B are oil-submerged pumps.
The material discharged from the discharge end of the rotary roasting furnace enters a purging device M6 after passing through a rotary discharge valve M5, and the purpose of the purging device is to further reduce the oil content in the material and refine diatomite after primary oil extraction. The purge gas of the refining equipment is high-temperature flue gas generated after natural gas is combusted in the combustion chamber of the rotary roasting furnace E1, the temperature of the high-temperature flue gas is higher than that of oil vapor in diatomite pores after primary oil extraction, condensation of the oil vapor in the pores is avoided, meanwhile, diatomite in the purge device M6 is fully fluidized by inert high-temperature flue gas purge gas, and trace oil gas entrained in the diatomite pores is purged completely.
The purge gas is blown in from a purge gas inlet 2 of a purge device M6 of the refining equipment, enters four uniformly distributed gas distribution pipes 7 at the bottom of the purge device M6 after being distributed by a gas distribution pipe 6, uniform gas outlet micropores 8 are formed in the four gas distribution pipes 7, and the purge gas is sprayed out from the gas outlet micropores 8 to fully contact and fluidize the materials, so that oil vapor remained in the pores of the materials is blown out. Inert gas, a small amount of oil steam and trace dust carried by the purge gas from the purge device M6 enter the purge gas cooler E5, the gas is cooled to below 200 ℃ by circulating cooling water and enters the purge gas bag-type dust remover D2, the dust is trapped in the purge gas bag-type dust remover D2, and the dust is discharged from the lower part and flows into the roller cooler E6 together with solid materials discharged by the purge device. The gas containing trace oil vapor is discharged from the bag-type dust collector D2 and enters the combustion chamber of the rotary roasting furnace E1 to be burnt.
After the diatomite subjected to primary oil extraction is refined by the refining equipment, trace oil vapor remained in gaps among diatomite particles is thoroughly removed, so that further harmless treatment of the diatomite subjected to primary oil extraction is realized.
The solid materials after being purged by inert gas flow into a roller cold material machine E6 under the action of gravity, the materials entering the roller cold material machine E6 are cooled to normal temperature by circulating cooling water, the materials are discharged from a discharge end of the roller cold material machine E6 and enter a pipe chain conveyor M7, the cooled materials are lifted to a storage bin V7 by the pipe chain conveyor M7, and a cloth bag dust remover D1 is arranged on the top of the storage bin V7 to absorb dust generated when the pipe chain conveyor M7 discharges. And a ton of packing machine M8 is arranged below the storage bin V7, and qualified diatomite after oil removal is put into the ton of packing machine M8 for recycling.
The re-absorption function of the diatomite treated by the process flow is more than 80% of that of the new diatomite; the base oil is clear and transparent, and can be recycled after refining.
While the foregoing is directed to the preferred embodiments of the present invention, it should be noted that the present invention is not limited to the examples described above, and that various changes and modifications could be made without departing from the general inventive concept, and these should also be considered as the scope of the present invention.
Claims (7)
1. An oily solid waste harmless continuous treatment system is characterized in that: the system comprises a feeding system, an oil-containing solid waste oil removing system, a fractional condensation recovery system, an oil-containing solid waste refining system, a finished oil treatment system, a material treatment system and a tail gas treatment system, wherein the feeding system conveys raw materials to the oil-containing solid waste oil removing system, the oil-containing solid waste oil removing system is a rotary roasting furnace heating system, oil vapor coming out of the oil-containing solid waste oil removing system enters the finished oil treatment system after passing through the fractional condensation recovery system, the fractional condensation recovery system comprises a first-stage condenser, a second-stage condenser and a finished oil cooler, solid materials coming out of the oil-containing solid waste oil removing system enter the oil-containing solid waste refining system to further reduce the oil content of the materials, the oil-containing solid waste refining system is a purging system, the materials enter the material treatment system after passing through the oil-containing solid waste refining system, and the purge tail gas of the oil-containing solid waste refining system and noncondensable gas at the outlet of the fractional condensation recovery system enter a combustion chamber of the rotary roasting furnace to be combusted;
The rotary roasting furnace body of the oil-containing solid waste oil removing system is externally provided with three combustion chambers, each combustion chamber is provided with six burners, every two burners are in a group, and the furnace body is divided into three sections, including a heating section, an oil gasification section and a high-temperature roasting section; the materials are heated rapidly in the heating section, and a small amount of oil vapor is distilled out; in the oil vaporization section, the temperature of a hearth is controlled to be 250-350 ℃, and most of base oil and additive oil are vaporized in the section within the temperature range; the high temperature section controls the temperature of the hearth of the high temperature section to be about 450 ℃, and a small amount of base oil and additive oil which are not evaporated in the area are further heated and evaporated at high temperature, so that the liquid oil in the diatomite is ensured to be vaporized to be changed into gaseous oil steam after passing through the high temperature section;
The heat source in the rotary roasting furnace is natural gas, a part of high-temperature flue gas after natural gas combustion is blown back into the combustion chamber by the circulating fan to reuse the latent heat of the high-temperature flue gas, a part of the high-temperature flue gas is discharged into the atmosphere by the induced draft fan after the fresh air from the combustion-supporting fan is heated by the air preheater, the heated fresh air enters the combustion chamber, and a part of the high-temperature flue gas is used as purge gas to enter the oil-containing solid waste refining system;
Oil steam from a rotary roasting furnace cylinder enters a first-stage condenser after dust removal through a cyclone separator, an oil-gas mixture condensed by the first-stage condenser enters an additive oil storage tank, liquid additive oil in the additive oil storage tank is separated, oil gas is discharged from the top and enters a second-stage condenser, after being cooled by the second-stage condenser, base oil in the oil gas is condensed and enters a finished oil cooler, and after passing through the finished oil cooler, the finished oil is cooled to normal temperature;
The oil-containing solid waste refining system comprises a sweeping device, a sweeping gas cooler and a sweeping gas dust remover, wherein the sweeping device comprises an inclined box body, a sweeping gas inlet is formed in the front end of the higher side of the inclined box body, a solid feeding port is formed in the upper surface of the inclined box body, which is close to one end of the sweeping gas inlet, a solid discharging port is formed in the lower surface of the box body, which is far away from one end of the sweeping gas inlet, a sweeping gas outlet is formed in the upper surface of the box body, which is far away from one end of the solid feeding port, the sweeping gas cooler is arranged behind the sweeping gas outlet, and a solid material outlet at the lower end of the sweeping gas dust remover is communicated with the solid discharging port at the lower end of the sweeping device through a pipeline to enter the next procedure; the air distribution pipe is arranged on the air distribution pipe, extends into the bottom of the inclined box body, and the air outlet micropores are uniformly formed in the lower surface of the air distribution pipe; the air outlet micropores are symmetrically arranged on the surface of the semi-cylinder under the air distribution pipe, and the included angle between the connecting line of each air outlet micropore and the circle center and the vertical axis of the cross section of the air distribution pipe is 45 degrees on the cross section of the air distribution pipe; the arrangement can ensure that the material can not block micropores and can fully fluidize the material in the whole inclined box body; the inclination angle of the box body of the purging device is smaller than the repose angle of the processed solid material;
The oil-containing solid waste is oil-containing diatomite.
2. The harmless continuous treatment system for oily solid waste according to claim 1, wherein: the feeding system comprises a raw material bin, wherein the raw material bin is a semi-underground material bin, a feeding screw conveyer is arranged at the lower part of the raw material bin and controlled by a variable frequency motor to adjust feeding quantity, the feeding screw conveyer is connected with a pipe chain conveyer, raw materials are lifted to a buffering feed hopper of the oil-containing solid waste oil system through the pipe chain conveyer, a gate valve and the feeding screw conveyer are arranged at the lower part of the buffering feed hopper, and the raw materials are conveyed to the oil-containing solid waste oil system through the feeding screw conveyer.
3. The harmless continuous treatment system for oily solid waste according to claim 1, wherein: the primary condenser is a vertical shell-and-tube heat exchanger, the oil vapor passes through a tube pass, the cold medium passes through a shell pass, the cold medium is fresh air blown in by a blower, the condensation temperature of the primary condenser is controlled to be 250 ℃, the secondary condenser is a horizontal U-shaped tube heat exchanger, the condensation temperature of the secondary condenser is controlled to be 120 ℃, the finished oil cooler is a horizontal U-shaped tube heat exchanger, and the secondary condenser and the finished oil cooler are arranged in an up-and-down overlapping mode.
4. The harmless continuous treatment system for oily solid waste according to claim 1, wherein: the finished oil treatment system comprises a finished oil storage and loading system, the finished oil flows into a finished oil middle tank after passing through a finished oil cooler, the finished oil in the finished oil middle tank is pumped into the finished oil tanks by the finished oil pump, the finished oil tanks are double-layer buried tanks, each finished oil tank is provided with a finished oil loading pump, and the finished oil loading pumps are oil-submerged pumps.
5. The harmless continuous treatment system for oily solid waste according to claim 1, wherein: the materials discharged from the discharge end of the rotary roasting furnace enter an oil-containing solid waste refining system through a rotary discharge valve, the purge gas is high-temperature flue gas generated after natural gas is combusted in the combustion chamber of the rotary roasting furnace, inert gas and a small amount of oil vapor from the purge device and trace dust carried by the purge gas enter a purge gas cooler, the gas is cooled to below 200 ℃ by circulating cooling water and enters a purge gas dust remover, and the dust is trapped in the purge gas dust remover.
6. The harmless continuous treatment system for oily solid waste according to claim 1, wherein: the material processing system comprises a material cooling, conveying, storing and packaging system, solid materials discharged from a blowing device and dust discharged from a blowing gas dust remover flow into a roller cold material machine together, the materials are cooled to normal temperature by circulating cooling water and then discharged from a discharge end of the roller cold material machine into a pipe chain conveyor, the cooled materials are lifted to a storage bin by the pipe chain conveyor, the dust of the bag dust remover during discharging is absorbed by the pipe chain conveyor at the top of the storage bin, a ton packing machine is arranged at the lower part of the storage bin, and qualified materials after oil removal are loaded into the ton packing machine for recycling.
7. The harmless continuous treatment system for oily solid waste according to claim 1, wherein: the noncondensable gas at the outlets of the secondary condenser and the finished oil condenser and the gas containing trace oil vapor in the sweeping gas dust remover are discharged from the upper part and recycled into the combustion chamber of the rotary roasting furnace.
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| CN208583795U (en) * | 2018-06-28 | 2019-03-08 | 郑州恒博环境科技股份有限公司 | A kind of innoxious continuous processing system of oil-containing solid waste |
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| CN208583795U (en) * | 2018-06-28 | 2019-03-08 | 郑州恒博环境科技股份有限公司 | A kind of innoxious continuous processing system of oil-containing solid waste |
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