CN108467742B - Sand desorption treatment method and device by utilizing flue gas indirect heating - Google Patents
Sand desorption treatment method and device by utilizing flue gas indirect heating Download PDFInfo
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- CN108467742B CN108467742B CN201810628686.7A CN201810628686A CN108467742B CN 108467742 B CN108467742 B CN 108467742B CN 201810628686 A CN201810628686 A CN 201810628686A CN 108467742 B CN108467742 B CN 108467742B
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- 238000003795 desorption Methods 0.000 title claims abstract description 94
- 238000010438 heat treatment Methods 0.000 title claims abstract description 46
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000003546 flue gas Substances 0.000 title claims abstract description 23
- 239000004576 sand Substances 0.000 title claims description 12
- 238000000034 method Methods 0.000 title abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000009833 condensation Methods 0.000 claims abstract description 21
- 230000005494 condensation Effects 0.000 claims abstract description 21
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 15
- 231100000719 pollutant Toxicity 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 103
- 238000003860 storage Methods 0.000 claims description 36
- 239000012071 phase Substances 0.000 claims description 22
- 238000002485 combustion reaction Methods 0.000 claims description 18
- 230000001681 protective effect Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000002893 slag Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 13
- 239000012634 fragment Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000007790 solid phase Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000295 fuel oil Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 3
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000013529 heat transfer fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- 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
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
Abstract
The invention relates to a sandy desorption treatment method and a device thereof by utilizing indirect heating of flue gas, which relate to the technical field of treatment of pollutants, and the method comprises three steps of crushing, thermal desorption and oil gas treatment, wherein the method comprises the steps of crushing and conveying materials to be thermally desorbed to a thermal desorption device, and the thermal desorption device uses the hot flue gas to perform heat exchange so as to perform anaerobic heating on the pollutants containing oil, so that the pollutants volatilize or separate; the thermal desorption can selectively convert the pollutants from one phase to the other phase by adjusting the heating temperature, the residence time and the like, different liquids are separated out at different temperatures, the recovery and the utilization can be realized, the temperature can be controlled, and the damage to the organic pollutants does not occur in the repairing process; the oil gas treated by the thermal desorption device enters a subsequent gas treatment system and is further separated, condensed, filtered and separated; meanwhile, a generator set is arranged on a medium circulation pipeline of the condensation separator, and the generator set generates power by using a high-temperature medium, so that the medium is cooled and other equipment is powered.
Description
Technical Field
The invention relates to the technical field of treatment of oil-containing pollutants, in particular to a sandy desorption treatment method and a sandy desorption treatment device by utilizing indirect heating of flue gas.
Background
At present, an oil-containing pollutant is a solid-liquid mixed waste rich in mineral oil, which is generated in petroleum exploration, exploitation, storage and refining processes. Whether the oil-containing pollutant enters soil or sea or lake, the oil-containing pollutant can cause serious pollution to ecological environment or water source, and effective and sustainable treatment is urgently needed. Although thermal desorption techniques for treating contaminants have been practiced worldwide, the following problems remain: high investment cost, high energy consumption, low efficiency and the like.
Disclosure of Invention
The invention provides a sand desorption treatment method and a sand desorption treatment device by utilizing flue gas indirect heating.
The invention discloses a sand desorption treatment method by utilizing indirect heating of flue gas, which comprises the following steps:
a. crushing: crushing the massive oily pollutants into fragments A, wherein the fragments A have the particle size of 10-30 mm;
b. thermal desorption: heating the fragments A obtained in the step a to gradually raise the heating temperature from 100 ℃ to 1000 ℃ at a heating rate of 260-300 ℃/h to obtain oil gas B and ash C, and conveying the ash C outwards;
c. oil gas treatment: and B, cooling and liquefying the oil gas B obtained in the step B at 200-300 ℃ after removing solids, and further separating out water and heavy oil for external transportation.
The invention relates to a sand desorption treatment device indirectly heated by flue gas, which consists of a crusher, a thermal desorption device and a separation device, wherein the discharge end of the crusher is opposite to a spiral conveyor I, the discharge end of the spiral conveyor I is connected with the inlet of the thermal desorption device, the oil phase outlet of the thermal desorption device is connected with a high-temperature heating furnace, the gas phase outlet of the high-temperature heating furnace is connected with the heat exchange medium inlet of the thermal desorption device, the solid phase outlet of the thermal desorption device is connected with a connecting hopper, the discharge port of the connecting hopper is connected with the feed end of the high-temperature heating furnace through a spiral conveyor II, the gas phase outlet of the thermal desorption device is connected with a cyclone device, the solid phase outlet end of the cyclone device is connected with a slag receiving hopper, the slag removing end of the slag receiving hopper is connected with the connecting hopper, the gas phase outlet end of the cyclone device is connected with a condensation separator, the oil phase outlet of the condensation separator is respectively connected with a 1# oil storage tank, a 2# oil storage tank and a 1# oil storage tank of the 3# oil storage tank through oil pumps, the 1# outer oil storage tank, the 2# oil storage tank and the 3# oil storage tank are respectively provided with a 1# outer oil pump, a 2# outer oil pump and a 3# outer oil pump on the outer transmission pipelines, the water phase outlet of the condensation separator is connected with a waste water tank through a water pump, the outer transmission pipelines of the waste water tank are provided with an outer water pump, the temperature control circulation outlet of the condensation separator is sequentially connected with a high Wen Peng expansion tank, a heat conducting oil booster pump, a generator, an air cooler, a low Wen Peng expansion tank and a heat conducting oil circulation pump, the heat conducting oil circulation pump is connected with the temperature control circulation inlet of the condensation separator, the waste liquid outlet of the condensation separator is connected with an oil separator through a non-condensable gas booster fan, the temperature control circulation pipeline of the oil separator is provided with an oil gas refrigerator, the oil phase outlet of the oil separator is connected with a 4# oil storage tank, the outer oil pump is arranged on the outer transmission pipeline of the 4# oil storage tank, the non-condensable gas outlet of the oil-gas separator is connected with an active carbon filter, and the gas outlet of the active carbon filter is connected with a high-temperature heating furnace.
As a further improvement of the invention, the thermal desorption device comprises a protective shell, a thermal desorption box and a heat supply mechanism, wherein the bottom of the protective shell is provided with the heat supply mechanism, the protective shell is internally provided with the thermal desorption box, a feed hopper is arranged outside the protective shell, the feed hopper is communicated with the interior of the thermal desorption box, a rotating shaft transversely penetrates through the thermal desorption box and the protective shell, one end of the rotating shaft is connected with a driving motor, the other end of the rotating shaft is connected with the inner wall of the thermal desorption box through a bearing, a material turning cutter and a material turning blade are arranged on the rotating shaft, the material turning cutter is positioned on one side of the feed hopper, the number of the material turning cutters is at least four, one end of the material turning cutter is concentrically and coaxially fixed on the rotating shaft, the other ends of the material turning cutters are equally distributed on the circumferential surface, and the material turning blades are concentrically and coaxially and fixedly connected by the four blades; a heat supply cavity is formed between the protective shell and the thermal desorption box; the heat supply mechanism comprises a base, a burner, a combustion cylinder and a storage box, wherein the base is of a hollow structure, the combustion cylinder and the storage box are arranged in the base, the storage box is connected with the combustion cylinder through a screw conveyer, one end of the combustion cylinder is arranged outside the base and connected with the burner, the top end of the middle part of the combustion cylinder is connected with a smoke exhaust cylinder A, a smoke outlet at the upper part of the smoke exhaust cylinder A is arranged in a heat supply cavity, and a smoke exhaust cylinder B is arranged at the top end of the heat supply cavity; the upper part and the lower part of the thermal desorption box are respectively provided with an exhaust pipeline and a discharge pipeline; one end of an exhaust pipeline is communicated with the thermal desorption box, the other end of the exhaust pipeline is connected with a membrane separator, a blower is arranged on the exhaust pipeline, the membrane separator is connected with a collecting tank through a pipeline, and a vacuum pump and a condenser are sequentially arranged on the pipeline.
As a further improvement of the invention, the intelligent automatic control system of the DCS is further provided with a wireless transmission module and a display, wherein the intelligent automatic control system of the DCS is respectively connected with a high-temperature heating furnace, a thermal desorption device, a screw conveyor I, a crusher, a high Wen Peng expansion tank, a heat conducting oil booster pump, a generator, an air cooler, a low Wen Peng expansion tank, a heat conducting oil circulating pump, a cyclone device, a slag receiving hopper, a condensation separator, an oil conveying pump, a water conveying pump, a non-condensable gas booster fan, an oil-gas refrigerator, an oil-gas separator, an external water conveying pump, an active carbon filter, a 1# external oil conveying pump, a 4# external oil conveying pump, a 2# external oil conveying pump, a 3# external oil conveying pump, a receiving hopper and a screw conveyor II in a circuit.
The sand desorption treatment device utilizing the indirect heating of the flue gas has wider application range and good treatment effect, the material to be thermally desorbed is firstly crushed and conveyed to the thermal desorption device by the conveyor, the thermal desorption device uses the indirect flue gas heated by the heating furnace as a medium to perform heat exchange, and the oil-containing pollutant is subjected to anaerobic heating, so that the pollutant is volatilized or separated from a pollution medium, the temperature of the flue gas is controllable, the temperature of the flue gas can reach 1000 ℃, the heat exchange efficiency is improved, the cracking speed is accelerated, the cracking is more thorough, the subsequent treatment equipment is reduced, the environmental pollution is reduced, the energy consumption is saved, the disposable input cost is reduced, meanwhile, the thermal desorption can selectively convert the pollutant from one phase to the other phase by adjusting the heating temperature, the residence time and the like, different liquids are separated out at different temperatures, the recycling can be realized, the temperature can be controlled at 100 ℃,200 ℃ and 500 ℃, and the damage to the organic pollutant does not occur in the repairing process; the oil gas treated by the thermal desorption device enters a subsequent gas treatment system, and is further separated, condensed, filtered and separated, so that the ultra-clean treatment of the oil-containing pollutants is realized; meanwhile, a generator set is arranged on a medium circulation pipeline of the condensation separator, and generates electricity by using a high-temperature medium, so that the medium is cooled, and meanwhile, electric energy is also generated to supply power for other equipment.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural diagram of a thermal desorption device according to the present invention.
Description of the embodiments
Example 1
A sand desorption treatment method by utilizing flue gas indirect heating comprises the following steps:
a. crushing: breaking the massive oily pollutants into fragments A, wherein the fragments A have the particle size of 10mm or 20mm or 30mm;
b. thermal desorption: heating the fragments A obtained in the step a, wherein the heating temperature is gradually increased from 100 ℃ to 1000 ℃, the heating rate is 260 ℃/h, 280 ℃/h or 300 ℃/h, and oil gas B and ash C are obtained and are conveyed outwards;
c. oil gas treatment: and B, after removing solids, cooling and liquefying the oil gas B obtained in the step B at 200 ℃, 250 ℃ or 300 ℃ so as to separate water and heavy oil for output.
Example 2
As shown in fig. 1, the invention discloses a sand desorption treatment device indirectly heated by flue gas, which consists of a crusher 4, a thermal desorption device 2 and a separation device, wherein the discharge end of the crusher 4 is opposite to a screw conveyor I3, and the crusher 4 combines the functions of stirring, cutting and the like to jointly crush sludge; meanwhile, a reciprocating sieve is arranged at the outlet to sieve sundries such as stones with the particle size larger than 20mm, and meanwhile, a self-cleaning cabin inner wall function is provided, and an inner side cutter is arranged on the blade to clean the oil sludge adhered on the inner wall, so that the motor is prevented from being damaged due to overlarge load; the floor area is small, the treatment speed is high, the efficiency is high, the influence of viscosity is small, and the treatment quality is stable; the discharge end of the screw conveyor I3 is connected with the inlet of the thermal desorption device 2, the oil phase outlet of the thermal desorption device 2 is connected with the high-temperature heating furnace 1, the gas phase outlet of the high-temperature heating furnace 1 is connected with the heat exchange medium inlet of the thermal desorption device 2, the solid outlet of the high-temperature heating furnace 1 is connected with the waste residue hopper 33, the solid phase outlet of the thermal desorption device 2 is connected with the receiving hopper 30, the discharge port of the receiving hopper 30 is connected with the feed end of the high-temperature heating furnace 1 through the screw conveyor II 31, the raw materials of the high-temperature heating furnace 1 are oil diesel oil or separated heavy oil, natural gas, methane, the burned ash discharged by the receiving hopper 30 and noncondensable gas discharged by the activated carbon filter 21, and energy sources and environment-friendly discharge are greatly saved; the temperature of the flue gas in the high-temperature heating furnace 1 is firstly increased to 100 ℃, then the flue gas is conveyed to the thermal desorption device 2 to preheat materials, part of water and heavy hydrocarbon are separated out, the high-temperature heating furnace 1 is continuously heated, the temperature of the flue gas reaches 1000 ℃, a heat source is indirectly provided for the thermal desorption device 2, after condensation and separation, hydrocarbons and noncondensable gases are separated out at different temperatures, ash slag is discharged, recycling is performed, and the whole operation is operated in a negative pressure state; the total petroleum hydrocarbon TPH of the solid phase residue after the treatment of the thermal desorption device 2 is less than 3 per mill, but after the solid phase residue is burned back by a heating furnace, the total petroleum hydrocarbon content TPH=0 of the solid phase residue is discharged in an ultra-clean way; the gas phase outlet of the thermal desorption device 2 is connected with a cyclone device 11, and oil gas firstly passes through the cyclone device 11 to filter ash slag carried out by the gas; the solid phase outlet end of the cyclone device 11 is connected with the slag receiving hopper 12, the slag removing end of the slag receiving hopper 12 is connected with the slag receiving hopper 30, the gas phase outlet end of the cyclone device 11 is connected with the condensation separator 13, oil gas enters the condensation separator 13, the temperature of the oil gas is controlled to be reduced, water and different types of hydrocarbons are separated, and the hydrocarbons can be transported and reused; the oil phase outlet of the condensation separator 13 is respectively connected with an external transmission pipeline of a 1# oil storage tank 24, a 2# oil storage tank 27 and a 3# oil storage tank 59,1# oil storage tank 24, a 2# oil storage tank 27 and a 3# oil storage tank 59 through an oil transmission pump 14, the external transmission pipeline of the 1# external transmission pump 23, the 2# external transmission pump 26 and the 3# external transmission pump 58 are respectively arranged on the external transmission pipeline of the 3# oil storage tank 59, the water phase outlet of the condensation separator 13 is connected with a waste water tank 19 through a water transmission pump 15, the external transmission pipeline of the waste water tank 19 is provided with an external water transmission pump 20, the temperature control circulation pipeline of the separator 13 is provided with a heat exchange device, the heat exchange device is sequentially connected with a high-temperature expansion tank 5 at the outlet of the temperature control circulation pipeline of the separator 13, a heat conducting oil booster pump 6, a generator 7, an air cooler 8, a low-temperature expansion tank 9 and a heat conducting oil circulation pump 10, the heat conducting oil circulation pump 10 is connected with the temperature control circulation inlet of the condensation separator 13, the heat exchange device adopts heat conducting oil as an energy storage carrier, and the heat energy is recovered, and is supplied to the equipment for recycling after power generation by the generator 7; the recovery utilization ratio is more than 90%, the heat conduction oil enters the condensation separator 13 from the low-temperature expansion tank 9 through the heat conduction oil circulation to exchange heat and recover heat, then returns to the high-temperature expansion tank 5, and then is conveyed to the generator 7 by the high-temperature heat conduction oil booster pump 6 to generate electricity, and the heat conduction oil after cooling and generating electricity returns to the low-temperature expansion tank 9 again for recycling; the expansion tank is usually arranged at the highest point of the system, can accommodate the thermal expansion amount of the heat transfer fluid, has the functions of emptying light components in the packed product, supplementing evaporation, operating loss, nitrogen sealing and the like of low-boiling-point substances generated in the operation, and is usually provided with a nitrogen seal of some devices in actual use, one of the functions of the nitrogen seal of the expansion tank is to prevent the heat transfer fluid from being oxidized due to contact with air, and a certain pressure can be applied to keep the liquid phase in operation; the waste liquid outlet of the condensation separator 13 is connected with an oil-gas separator 18 through a non-condensable gas booster fan 16, an oil-gas refrigerator 17 is arranged on a temperature control circulating pipeline of the oil-gas separator 18, non-condensable gas is separated out of oil products after passing through the oil-gas refrigerator 17 and the oil-gas separator 18 under the action of the booster fan 16, an oil phase outlet of the oil-gas separator 18 is connected with a No. 4 oil storage tank 22, a No. 4 external oil delivery pump 25 is arranged on an output pipeline of the No. 4 oil storage tank 22, a non-condensable gas outlet of the oil-gas separator 18 is connected with an activated carbon filter 21, and a non-condensable gas outlet of the activated carbon filter 21 is connected with the high-temperature heating furnace 1 to recycle the non-condensable gas.
The thermal desorption device 2 comprises a protective shell 28, a thermal desorption box 29 and a heat supply mechanism, wherein the bottom of the protective shell 28 is provided with the heat supply mechanism, the thermal desorption box 29 is arranged in the protective shell 28, a feed hopper 42 is arranged outside the protective shell 28, the feed hopper 42 is communicated with the inside of the thermal desorption box 29, a rotating shaft 43 transversely penetrates through the thermal desorption box 29 and the protective shell 28, one end of the rotating shaft 43 is connected with a driving motor 51 through the thermal desorption box 29, the other end of the rotating shaft 43 is connected with the inner wall of the thermal desorption box 29 through a bearing, a material-turning cutter 44 and material-turning blades 45 are arranged on the rotating shaft 43, the material-turning cutter 44 is positioned on one side of the feed hopper 42, the number of the material-turning cutters 44 is at least four, one ends of the material-turning cutters 44 are concentrically and coaxially fixed on the rotating shaft 43, the other ends of the material-turning cutters 44 are equally distributed on the circumferential surface, the number of the material-turning blades 45 is at least four, and the material-turning blades 45 are concentrically and coaxially and fixedly connected by four blades; a heat supply cavity 56 is formed between the protective shell 28 and the thermal desorption box 29; the heat supply mechanism comprises a base 34, a burner 35, a combustion cylinder 36 and a storage box 37, wherein the base 34 is of a hollow structure, the combustion cylinder 36 and the storage box 37 are arranged in the base 34, the storage box 37 is connected with the combustion cylinder 36 through a screw conveyer 52, one end of the combustion cylinder 36 is arranged outside the base 34 and connected with the burner 35, the top end of the middle part of the combustion cylinder 36 is connected with a smoke exhaust cylinder A38, a smoke outlet at the upper part of the smoke exhaust cylinder A38 is arranged in a heat supply cavity 56, and a smoke exhaust cylinder B39 is arranged at the top end of the heat supply cavity 56; the upper part and the lower part of the thermal desorption box 29 are respectively provided with an exhaust pipeline 40 and a discharge pipeline 41; one end of the exhaust pipeline 40 is communicated with the thermal desorption box 29, the other end of the exhaust pipeline 40 is connected with the membrane separator 46, a blower 47 is arranged on the exhaust pipeline, the membrane separator 46 is connected with the collecting tank 48 through a pipeline, and a vacuum pump 49 and a condenser 50 are sequentially arranged on the pipeline.
When the thermal desorption system is used, materials are put into the thermal desorption box 29 through the feed hopper 42, the driving motor 51 is started, the driving motor 51 drives the rotating shaft 43 to rotate, then the material turning guillotine 44 and the material turning blades 45 arranged on the rotating shaft 43 do circular motion, the materials enter the material turning guillotine 44 after passing through the feed hopper 42, the material turning guillotine 44 breaks the materials first, the materials are lifted through the stirring plate on the material turning guillotine 44, the materials are broken through the plurality of material turning blades 45, the blade positions on the material turning blades 45 are arranged in a staggered manner, the materials are broken when the material turning blades 45 do circular motion, and the materials are heated and desorbed uniformly; simultaneously, the storage box 37 conveys fuel (biomass particle fuel) into the combustion cylinder 36 through the screw conveyor 52, the combustor 35 ignites the fuel, the fuel is combusted in the combustion cylinder 36, hot flue gas generated by combustion enters the heat supply cavity 45 through the smoke exhaust cylinder A38, the hot flue gas optionally moves in the heat supply cavity 45 and surrounds the thermal desorption box 29, the thermal desorption box 29 is heated, the purpose of uniformly heating the thermal desorption box 29 is achieved, the hot flue gas heats the thermal desorption box 29, namely, materials in the thermal desorption box 29 are heated, and along with the material particles becoming smaller and along with the continuous turning of the material turning blade 45, the materials can be uniformly heated, the thermal efficiency is accelerated, the desorption speed and the desorption quality are improved, and the consumption of energy sources is further reduced.
The sand desorption treatment device indirectly heated by utilizing flue gas further comprises a DCS intelligent autonomous control system 32, wherein a wireless transmission module and a display are arranged in the DCS intelligent autonomous control system 32, and the DCS intelligent autonomous control system 32 is respectively in circuit connection with a high-temperature heating furnace 1, a thermal desorption device 2, a spiral conveyor I3, a crusher 4, a high Wen Peng expansion tank 5, a heat-conducting oil booster pump 6, a generator 7, an air cooler 8, a low-temperature expansion tank 9, a heat-conducting oil circulating pump 10, a cyclone device 11, a slag receiving hopper 12, a condensation separator 13, an oil pump 14, a water pump 15, a non-condensable gas booster fan 16, an oil-gas refrigerator 17, an oil-gas separator 18, an external water pump 20, an active carbon filter 21, a 1# external oil pump 23, a 4# external oil pump 25, a 2# external oil pump 26, a 3# external oil pump 58, a receiving hopper 30 and a spiral conveyor II 31; the intelligent PID automatic operation, adjustment and control are realized by utilizing intelligent sensors such as pressure sensors, temperature sensors, flow dosimeters, liquid level sensors and the like of equipment such as the thermal desorption device 2, the high-temperature heating furnace 1, the oil-gas separator 18 and the like, and intelligent operation management is realized. The DCS intelligent autonomous control system can remotely transmit operation data to terminal equipment such as a mobile phone, a tablet computer and the like in a wireless way through a 4G network, can check and monitor the operation condition of the equipment in real time, and can regulate and control the intelligent autonomous control system through the terminal equipment such as the mobile phone, the tablet computer and the like to realize wireless remote control.
Claims (2)
1. A sand desorption treatment device indirectly heated by flue gas is composed of a crusher (4), a thermal desorption device (2) and a separation device, and is characterized in that the discharge end of the crusher (4) is opposite to a spiral conveyor I (3), the discharge end of the spiral conveyor I (3) is connected with the inlet of the thermal desorption device (2), the oil phase outlet of the thermal desorption device (2) is connected with a high-temperature heating furnace (1), the gas phase outlet of the high-temperature heating furnace (1) is connected with the heat exchange medium inlet of the thermal desorption device (2), the solid phase outlet of the thermal desorption device (2) is connected with a hopper (30), the discharge port of the connecting hopper (30) is connected with the feed end of the high-temperature heating furnace (1) through a spiral conveyor II (31), the gas phase outlet of the thermal desorption device (2) is connected with a cyclone device (11), the solid phase outlet end of the cyclone device (11) is connected with a slag receiving hopper (12), the slag removing end of the slag receiving hopper (12) is connected with the heat exchange medium inlet of the thermal desorption device (2), the gas phase outlet of the thermal desorption device (11) is connected with a condenser (13), the condenser (13) is connected with an oil pump (24 # 3) and an oil storage tank # oil # 3 (24) of the oil storage tank # 1, and an oil # tank # 3 (24) is connected with an oil # tank (24) storage tank) respectively The waste liquid outlet of the condensation separator (13) is connected with an oil-gas separator (18) through a non-condensable gas booster fan (16), the temperature-control circulation pipeline of the oil-gas separator (18) is provided with an oil-gas refrigerator (17), the oil-phase outlet of the oil-gas separator (18) is connected with a 4# oil storage tank (22), the temperature-control circulation outlet of the 4# oil storage tank (22) is sequentially connected with a high Wen Peng expansion tank (5), a heat-conducting oil booster pump (6), a generator (7), an air cooler (8), a low-temperature expansion tank (9) and a heat-conducting oil circulation pump (10), the heat-conducting oil circulation pump (10) is connected with the temperature-control circulation inlet of the condensation separator (13), the waste liquid outlet of the condensation separator (13) is connected with the oil-gas separator (18) through a non-condensable gas booster fan (16), the temperature-control circulation pipeline of the oil-gas separator (18) is provided with the oil-gas refrigerator (17), the oil-phase outlet of the oil-gas separator (18) is connected with the 4# oil storage tank (22), and the 4# oil-gas circulation outlet of the 4# oil storage tank (22) is sequentially connected with the active carbon filter (21) of the high-temperature-resistant carbon filter (1); the thermal desorption device (2) comprises a protective shell (28), a thermal desorption box (29) and a heating mechanism, wherein the heating mechanism is arranged at the bottom of the protective shell (28), the thermal desorption box (29) is arranged in the protective shell (28), the feed hopper (42) is arranged outside the protective shell (28), the feed hopper (42) is communicated with the inside of the thermal desorption box (29), a rotating shaft (43) transversely penetrates through the thermal desorption box (29), one end of the rotating shaft (43) penetrates through the thermal desorption box (29) and the protective shell (28) to be connected with a driving motor (51), the other end of the rotating shaft (43) is connected with the inner wall of the thermal desorption box (29) through a bearing, a material turning cutter (44) and material turning blades (45) are arranged on the rotating shaft (43), the material turning cutter (44) is positioned on one side of the feed hopper (42), the number of the material turning cutter (44) is at least four, one end of the material turning cutter (44) is concentrically and coaxially fixed on the rotating shaft (43), the other end of the material turning cutter (44) is concentrically and fixedly distributed on the circumference surface, the number of the material turning blades (45) is at least four, and the material turning blades (45) are coaxially and fixedly connected with the four blades; a heat supply cavity (56) is formed between the protective shell (28) and the thermal desorption box (29); the heat supply mechanism comprises a base (34), a burner (35), a combustion cylinder (36) and a storage box (37), wherein the base (34) is of a hollow structure, the combustion cylinder (36) and the storage box (37) are arranged in the base (34), the storage box (37) is connected with the combustion cylinder (36) through a screw conveyer (57), one end of the combustion cylinder (36) is arranged outside the base (34) and connected with the burner (35), the top end of the middle part of the combustion cylinder (36) is connected with a smoke exhaust cylinder A (38), a smoke outlet at the upper part of the smoke exhaust cylinder A (38) is arranged in a heat supply cavity (56), and a smoke exhaust cylinder B (39) is arranged at the top end of the heat supply cavity (56); an exhaust pipeline (40) and a discharge pipeline (41) are respectively arranged at the upper part and the lower part of the thermal desorption box (29); one end of an exhaust pipeline (40) is communicated with the thermal desorption box (29), the other end of the exhaust pipeline (40) is connected with a membrane separator (46), a blower (47) is arranged on the exhaust pipeline, and the membrane separator (46) is connected with a collection tank (48) through a vacuum pump (49) and a condenser (50) which are sequentially arranged on the pipeline;
the processing steps are as follows:
a. crushing: crushing the massive oily pollutants into fragments A, wherein the fragments A have the particle size of 10-30 mm;
b. thermal desorption: heating the fragments A obtained in the step a to gradually raise the heating temperature from 100 ℃ to 1000 ℃ at a heating rate of 260-300 ℃/h to obtain oil gas B and ash C, and conveying the ash C outwards;
c. oil gas treatment: and B, cooling and liquefying the oil gas B obtained in the step B at 200-300 ℃ after removing solids, and further separating out water and heavy oil for external transportation.
2. The sand desorption processing apparatus that utilizes flue gas indirect heating of claim 1, characterized by still including DCS intelligence autonomous control system (32), DCS intelligence autonomous control system (32) inside is equipped with wireless transmission module and display, DCS intelligence autonomous control system (32) respectively with high temperature heating furnace (1), thermal desorption device (2), screw conveyer I (3), breaker (4), high temperature expansion tank (5), conduction oil booster pump (6), generator (7), air cooler (8), low temperature expansion tank (9), conduction oil circulating pump (10), cyclone (11), connect sediment fill (12), condensate separator (13), oil transfer pump (14), water transfer pump (15), noncondensable gas booster fan (16), oil gas refrigerator (17), oil separator (18), outer water transfer pump (20), active carbon filter (21), 1# outer oil transfer pump (23), 4# outer oil transfer pump (25), 2# outer pump (26), 3# outer pump (58), connect hopper (30) and screw conveyer II (31) circuit connection.
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| CN112664956A (en) * | 2020-12-21 | 2021-04-16 | 湖南长科诚享石化科技有限公司 | Method for treating oil-containing solid slag |
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| CN105399294A (en) * | 2016-01-01 | 2016-03-16 | 山东拓普石油装备有限公司 | Recycling and harmless treating process for oily sludge and sand |
| CN106430893A (en) * | 2016-11-03 | 2017-02-22 | 江苏保瑞工业水处理有限公司 | Oil sludge resourceful treatment system |
| CN208430096U (en) * | 2018-06-19 | 2019-01-25 | 大庆高新区百世环保科技开发有限公司 | A kind of sandization desorption processing unit using flue gas indirect heating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399294A (en) * | 2016-01-01 | 2016-03-16 | 山东拓普石油装备有限公司 | Recycling and harmless treating process for oily sludge and sand |
| CN106430893A (en) * | 2016-11-03 | 2017-02-22 | 江苏保瑞工业水处理有限公司 | Oil sludge resourceful treatment system |
| CN208430096U (en) * | 2018-06-19 | 2019-01-25 | 大庆高新区百世环保科技开发有限公司 | A kind of sandization desorption processing unit using flue gas indirect heating |
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