CN205223117U - Pyrolysis distillation plant - Google Patents
Pyrolysis distillation plant Download PDFInfo
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- CN205223117U CN205223117U CN201520784358.8U CN201520784358U CN205223117U CN 205223117 U CN205223117 U CN 205223117U CN 201520784358 U CN201520784358 U CN 201520784358U CN 205223117 U CN205223117 U CN 205223117U
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- still kettle
- distilling apparatus
- stills
- water distilling
- electromagnetic induction
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Abstract
The utility model relates to a pyrolysis distillation plant, wherein, matter entrance sets up the upper portion at stills, the (mixing) shaft runs through the setting in stills along stills's length direction, at least one scraper subassembly set up on the (mixing) shaft and with stills's inner wall contact, the electromagnetic induction heating ware sets up in stills's outside, and stills is in among the alternating magnetic field of electromagnetic induction heating ware production, and at least one arranges the lower part of cinder notch setting at stills. The utility model discloses a set up the clearance in time of scraper subassembly attached to the distillation residue on the stills inner wall in stills to adopt the electromagnetic induction heating ware to heat stills, thereby gain the effect that the heating is comparatively even, rate of heating is very fast, the row's of preventing cinder notch blocks up.
Description
Technical field
The utility model relates to drilling cuttings, drilling wastes processing technology field, particularly relates to a kind of distillation pyrolysis installation.
Background technology
Along with country is to the increasing of the unconventional energy resource exploitation dynamics such as shale gas, discarded oil-base mud and oil-contained drilling cuttings constantly produce in a large number and accumulate, the oil-contained drilling cuttings that drilling phase individual well produces is about 300-500 ton, wherein oily substance accounts for 25-30%, also containing a large amount of toxic substances such as benzene homologues, phenols, anthracene, pyrene, the heavy metals such as salt and copper, zinc, chromium, mercury.In addition, well site is distributed more widely, and drilling cuttings, drilling wastes treatment in situ are urgently to be resolved hurrily.These drilling cuttings, drilling wastes not easily process, and decomposing completely under natural condition needs the year up to a hundred, and not only direct land occupation and space, and severe contamination air, soil and groundwater, constrain the prodution and development of petroleum industry to a certain extent.Therefore the harmless treatment of discarded oil-base mud and oil-contained drilling cuttings generally comes into one's own.
Along with the requirement of national environmental protection statutory standard improves constantly, law enforcement for environmental protection dynamics continues to increase, the Environmental capacity of oil field waste and recycling become the industry keep sustainable development must faced by focus.For innoxious, the recycling treatment of oil field waste, present pyrolysis processing technology uses flue gas, steam or the heating means such as combustion gas, fuel oil usually, and heat uneven, energy consumption is high, and its heat transmits mainly through thermal conduction, convection current approach.These traditional heating method for pyrolysis heating efficiency are low, can not accurate temperature controlling, and the product after process be made to be up to state standards, and the energy often expended is more, and economy is lower.Volume because of equipment is general comparatively large, is not easy to mobile, inadequate maneuverability, and the individual well for oil field is not concentrated, pollution dispersion is extensively inapplicable.Facility investment is high in addition, and running cost is high.
In the prior art, the problems such as current device heating efficiency is low, temperature is uncontrollable, slag-drip opening blocking are in the urgent need to address.
Utility model content
For Problems existing in correlation technique, it is comparatively even that the purpose of this utility model is to provide a kind of heating, and rate of heating is fast, prevents the pyrolysis water distilling apparatus that slag-drip opening blocks simultaneously.
For achieving the above object, the utility model relates to a kind of pyrolysis water distilling apparatus, comprising:
Still kettle;
Material inlet, is arranged on the top of still kettle;
Stir shaft, the length direction along still kettle runs through and is arranged in still kettle;
At least one doctor assemblies, to be arranged on stir shaft and with the contact internal walls of still kettle;
Electromagnetic induction heater, is arranged on the outside of still kettle, and still kettle is in the alternating magnetic field of electromagnetic induction heater generation;
At least one slag-drip opening, is arranged on the bottom of still kettle.
According to pyrolysis water distilling apparatus of the present utility model, wherein, doctor assemblies comprises scraper, doctor blade frames, union lever, elastic component and skeleton; Skeleton is fixed on stir shaft; One end of union lever is connected in skeleton slidably, and the other end of union lever is fixedly connected in doctor blade frames; Elastic component is set on the union lever between doctor blade frames and skeleton, and by the inwall upper offset of scraper to still kettle.
According to pyrolysis water distilling apparatus of the present utility model, wherein, scraper tilts relative to the inwall of still kettle and becomes angle with the inwall of still kettle.
According to pyrolysis water distilling apparatus of the present utility model, wherein, electromagnetic induction heater comprises the toroidal coil that at least one has elongated shape, and toroidal long axis direction is consistent with the length direction of still kettle.
According to pyrolysis water distilling apparatus of the present utility model, wherein, between still kettle and electromagnetic induction heater, be provided with insulated thermal insulating layer.
According to pyrolysis water distilling apparatus of the present utility model, wherein, also comprise temperature probe, temperature probe is connected with stir shaft by slip ring, and is configured to static relative to still kettle.
According to pyrolysis water distilling apparatus of the present utility model, wherein, it is characterized in that, the mounting seat of slag-drip opening valve adopts the mode of closing with the embedding reef knot of still kettle inwall to be arranged in still kettle.
According to pyrolysis water distilling apparatus of the present utility model, wherein, at least one slag-drip opening is multiple, and multiple slag-drip opening is along the length direction spread configuration of still kettle.
The beneficial effects of the utility model are:
Pyrolysis water distilling apparatus of the present utility model, the distillation residue be attached on still kettle inwall are cleared up in time by arranging doctor assemblies in still kettle, and adopt electromagnetic induction heater to heat still kettle, thus obtain the effect that heating is comparatively even, rate of heating is very fast, prevent slag-drip opening from blocking.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the example structure schematic diagram of pyrolysis water distilling apparatus of the present utility model;
Fig. 2 is the A-A schematic cross-section shown in Fig. 1;
Fig. 3 is the B-B schematic cross-section shown in Fig. 1;
Fig. 4 is the embodiment schematic flow sheet of material treatment process of the present utility model;
Fig. 5 is the process flow sheet of material treatment process of the present utility model.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the embodiment of pyrolysis water distilling apparatus of the present utility model.Fig. 2 is the A-A schematic cross-section shown in Fig. 1.As shown in Figure 1, the pyrolysis water distilling apparatus of the present embodiment can comprise still kettle 11, material inlet 13, oil gas vent 8, stir shaft 1, at least one doctor assemblies, electromagnetic induction heater 14 (as shown in Figure 2) and at least one slag-drip opening 9.
Particularly, as shown in Figure 1, still kettle 11 is cylinder in the present embodiment, and the length direction of still kettle 11 is consistent with the generatrix direction of cylinder, material inlet 13 enters the entrance of still kettle 11 as waste material, oil gas vent 8 discharges the outlet of still kettle as oil gas, and material inlet 13 and oil gas vent 8 are arranged on the top of still kettle 11 in the present embodiment; Stir shaft 1 runs through along the length direction of still kettle 11 and is arranged in still kettle 11, when still kettle 11 works, stir shaft 1 rotates and stirs drilling cuttings, drilling wastes, and waste is contacted with still kettle 11 wall fully, the heat of still kettle 11 is passed to waste, is beneficial to the rapid evaporation of waste.At least one doctor assemblies to be arranged on stir shaft 1 and with the contact internal walls of still kettle 11, when more than one doctor assemblies, each doctor assemblies interval is arranged.At least one slag-drip opening 9 is arranged on the bottom of still kettle 11, and when more than one slag-drip opening 9, each slag-drip opening 9 interval is arranged.In addition, specifically as shown in Figure 2, electromagnetic induction heater is arranged on the outside of still kettle 11, and still kettle is in the alternating magnetic field of electromagnetic induction heater 14 generation.
The principle of heating of electromagnetic induction heater 14 is to produce alternating magnetic field by electromagnetic induction device, when container made of iron is placed in alternating magnetic field, vessel surface cutting alternate magnetic force line, the electric current of alternation is produced at canister metals chamber outer wall, i.e. eddy current, eddy current makes the iron atom high speed random motion of container cavity, and atom collides with each other, rub and produce heat energy.Thus play the effect of heating container.Namely by being magnetic energy electric energy conversion, make to be sensed magnetic energy by the container heated and a kind of type of heating generated heat.This mode it fundamentally solve the inefficiency problem that resistance type heater heated by heat exchange pattern as electric heating piece, electric heating coil etc.Utilize electromagnetic induction to heat body of heater, heating is comparatively even, and rate of heating is fast, also can reduction equipment volume, easy sledge dressization.Still kettle adopts Static Design, and during still kettle equipment work, still kettle is not rotated, and only has stir shaft to rotate, and can arrange inner coke cleaning facility, increases heat transfer efficiency and guarantees treatment effect, improve the operating safety of equipment.Temperature-controllable, better can reclaim oil content, increases economic benefit.
The pyrolysis water distilling apparatus of the present embodiment, the distillation residue be attached on still kettle inwall are cleared up in time by arranging doctor assemblies in still kettle, and adopt electromagnetic induction heater to heat still kettle, thus obtain the effect that heating is comparatively even, rate of heating is very fast, prevent slag-drip opening from blocking.
Further alternatively, doctor assemblies comprises scraper 5, doctor blade frames 6, union lever 3 and elastic component 4 and skeleton 2; Skeleton 2 is fixed on stir shaft 1; One end of union lever 3 is connected in skeleton 2 slidably, and the other end of union lever 2 is fixedly connected in doctor blade frames 6; Elastic component 4 is set on the union lever 2 between doctor blade frames 6 and skeleton 2, and by the inwall upper offset of scraper 5 to still kettle 11.The distillation residue of doctor assemblies on the inwall striking off still kettle 11; Scraper 5 utilizes resistant to elevated temperatures elastic component 4 by it by being pressed on still kettle 11 inwall, effectively can strike off the distillation residue on inwall, prevent inwall coking.Stir shaft 1 in still kettle 11 and scraper 5 slide on still kettle 11 inwall whole, cling on inwall to prevent waste.
Further alternatively, scraper 5 tilts relative to the inwall of still kettle 11 and becomes angle with the inwall of still kettle 11, to reduce the reactive force of the inwall of scraper 5 and still kettle 11.
Further alternatively, electromagnetic induction heater 14 comprises the toroidal coil that at least one has elongated shape, and the toroidal coil of this elongated shape has minor axis and is longer than the major axis of minor axis, and toroidal long axis direction is consistent with the length direction of still kettle 11.In actual applications, the structure of other shape can also be selected.
Further alternatively, between still kettle 11 and electromagnetic induction heater 14, be provided with high-temperature insulation thermofin 15, avoid electromagnetic induction heater to be distilled still wall and burn burnt, and the heat preventing still kettle from producing scatter and disappear in a large number, plays heat insulation effect.
Further alternatively, the present embodiment further comprises temperature probe 10, and temperature probe 10 is connected with stir shaft 1 by slip ring, and is configured to static relative to still kettle 11, for monitoring the actual temperature of drilling cuttings, drilling wastes.Thus can control temperature more accurately.
Further alternatively, the mounting seat 12 of slag-drip opening 9 valve adopts the mode of closing with the embedding reef knot of still kettle 11 inwall to be arranged in still kettle 11.Fig. 3 is the B-B schematic cross-section shown in Fig. 1.Particularly as shown in Figure 3, the valve installation base 12 of slag notch 9 adopts the mode of closing with the embedding reef knot of still kettle 11 inwall, scraper 5 fully can be contacted with mounting seat 12, prevent material at slag-drip opening 9 place bridge joint.Its constructional feature is in limited structure space, has maximized port bore, can realize the quick blowing of powder and particle, not hinder blowing, without blowing dead angle.
Further alternatively, at least one slag-drip opening 9 is multiple, and multiple slag-drip opening 9, along the length direction spread configuration of still kettle 11, is beneficial to residue and discharges fast, save time, and ensures the treatment capacity of equipment.Deslagging is for discharge in batches, and discharge per hour once.Drain time is not more than 10 minutes.Scraper 5 tilts relative to the direction of distillation residue movement, is discharged by distillation residue by slag-drip opening 9.
Further alternatively, the present embodiment further comprises Special-shaped Plates 7.In the present embodiment, the every triad of sketch plate 7 are disposed between doctor assemblies, and auxiliary stir shaft 1 rotates and stirs drilling cuttings, drilling wastes, and waste is contacted with still kettle 11 wall fully.
Fig. 4 is the embodiment schematic flow sheet of material treatment process of the present utility model.As shown in Figure 4, the material treatment process of the present embodiment can comprise the steps:
S1: material loading step, adopts the first feed screw by mass transport to drier.
For drilling cuttings, drilling wastes than great, containing solid high, select shaftless screw to carry out material loading, good airproof performance, without blocking.
S2: separating step for the first time, adopts drier to be separated material, to obtain drilling fluid, to dry slag and the first dusty gas.
Drier adopts periodic running, and the drilling fluid after drying accounts for 20-30%, after entering drilling fluid holding tank, is sent to the further solid-liquid separation liquid phase of supercentrifuge and reclaims rear reuse.Drying slag after drier process is accounted for 70-80%, and the decompression pyrolysis water distilling apparatus entering next stage processes further.Remove portion of water through drier process, reaction times and the running cost of post equipment can be reduced.
S3: second time separating step, adopts whizzer to be separated drilling fluid, to obtain reuse drilling fluid and oil sludge;
Whizzer also adopts periodic running, and the dry slag after centrifugal treating enters next stage decompression pyrolysis water distilling apparatus and processes further.Remove portion of water, reaction times and the running cost of post equipment can be reduced, divide moisture through whizzer process removal unit, reaction times and the running cost of post equipment can be reduced.
S4: distillation pyrolysis step, adopts the pyrolysis water distilling apparatus shown in Fig. 1 to carry out distillation pyrolysis, to obtain cut and dregs to drying slag and oil sludge.
The distillation pyrolysis of the present embodiment adopts underpressure distillation pyrolysis system, namely, on the basis comprising electromagnetic induction heater embodiment illustrated in fig. 1, cut condenser, sump oil surge tank, dregs cooling tank, induced draft fan, the second feed screw and discharging spiral can also be comprised.
Utilize decompression pyrolysis water distilling apparatus, preferably, the pressure about-90Kpa and under the working conditions of about 380 DEG C, the oil content in oil sludge is gasified.Preferably, the present embodiment further comprises Nitrogen plant, is filled with nitrogen fast, determines safety during deslagging in still kettle.Gas after gasification reclaims after entering the cooling of cut condenser, leaves the dish scheming carrying out next stage in holding tank in and carries out fine separation, and the residue after process enters dregs cooling tank and keeps in.Dregs cooling tank arranges nitrogen protection and cleaning apparatus, non-condensable gas is carried out purifying treatment, standard discharge.
Particularly, cut condenser reclaims from electromagnetic induction heater expellant gas for cooling; Sump oil surge tank is for collecting temporary cut condenser discharge liquid; The high temperature dregs that still kettle is discharged by dregs cooling tank and the gas be not condensed are kept in and cool; Non-condensable gas is introduced exhaust gas cleaner process by induced draft fan; In the present embodiment, preferably, drilling cuttings, drilling wastes are sent into decompression pyrolysis water distilling apparatus in the mode tilting to carry and horizontal feed combines by spiral conveyer; Drilling cuttings after process, drilling wastes are discharged in the mode tilting to carry and horizontal feed combines by discharging spiral.
S5: cooling step, adopts cooling system to cool to obtain cooled cut to cut, adopts dregs cooling tank to cool to obtain slag and the second dusty gas to dregs.
Cooling system adopts closed cooling tower, is be placed in tower by tubular heat exchanger, ensures cooling-down effect by the heat exchange of the air, spray water and the recirculated water that circulate.Owing to being closed cycle, it can ensure that water quality is not contaminated, well protects the Effec-tive Function of primary device, improves work-ing life.Sledge installing meter, convenient mobile.
In the present embodiment, equipment is provided with cooling tower, chilling spray pump and establishes tank.
S6: separating step for the third time, adopts disk plate centrifuge to be separated cooled cut, to obtain oil, water and residue.
Utilize disc centrifuge that the moisture sump oil reclaimed is carried out fine separation.Water after separation enters clear water surge tank Posterior circle and utilizes, and the oil after separation enters self-cleaning oil surge tank Posterior circle and utilizes, and the residue after process then enters decompression pyrolysis water distilling apparatus and again processes.
In the present embodiment, disk plate centrifuge, clear water surge tank and self-cleaning oil surge tank are set.
S7: tail gas clean-up step, discharges after adopting exhaust gas cleaner to carry out purifying treatment to the first dusty gas and the second dusty gas.
Produce in thermal desorption non-condensable gas and equipment running process containing qualified discharge after dusty gas purifying treatment.
In the present embodiment, exhaust gas cleaner, alkali lye water-sealed tank and digester are set, utilize catalysis non-flaming combustion, there is no naked light, without potential safety hazard, safe and efficient.
And sack cleaner and induced draft fan are set, utilize the blowback of Nitrogen plant nitrogen.The dusty gas that drier slag-drip opening and dregs cooling tank produce delivers to sack cleaner by induced draft fan, qualified discharge after process.In addition also Nitrogen plant is set, joins nitrogen pot and air vessel.
Fig. 5 is the process flow sheet of material treatment process of the present utility model.As shown in Figure 5, the technique of the material treatment process of the present embodiment comprises material loading, is separated for first and second times, distills pyrolysis, cooling, third time separation and tail gas clean-up process.
In the present embodiment, drilling cuttings, oil base drilling wastes are delivered to drier L2 through the first feed screw L1, and drier L2 adopts periodic running, drilling fluid after drying accounts for 20-30%, after entering drilling fluid holding tank, be sent to the further solid-liquid separation of supercentrifuge L3, reuse after liquid phase reclaims.Be separated at drier L2, to obtain drilling fluid, to dry slag and the first dusty gas.The decompression pyrolysis water distilling apparatus L6 that the oil sludge drying slag accounting for 70-80% after drier L2 process and the further solid-liquid separation of supercentrifuge L3 obtained enters next stage by the second feed screw L5 processes further.
In some preferably embodiment, the pressure about-90Kpa and under the working conditions of about 380 DEG C, and further comprise Nitrogen plant L12, in still kettle, be filled with nitrogen fast during deslagging, determine safety.Pyrolysis water distilling apparatus L6 carries out distillation pyrolysis, to obtain cut and dregs to drying slag and oil sludge.Gas after gasification enters cut condenser L4, by cooling system L9, circulating cooling is carried out to the cut in cut condenser L4 and the recirculated water supplemented, to obtain cooled cut, leave the disk plate centrifuge L10 carrying out next stage in holding tank L8 in and carry out fine separation, the residue after process enters dregs cooling tank L7 and keeps in.Dregs cooling tank L7 arranges nitrogen protection and cleaning apparatus, non-condensable gas is carried out purifying treatment, standard discharge.Dregs cooling tank L7 is adopted to cool to obtain slag and the second dusty gas to dregs.
Utilize disc centrifuge L10 that the moisture sump oil reclaimed is carried out fine separation.Water after separation enters clear water surge tank Posterior circle and utilizes, and the oil after separation enters self-cleaning oil surge tank Posterior circle and utilizes, and the residue after process then enters decompression pyrolysis water distilling apparatus L6 and again processes.Discharge after adopting exhaust gas cleaner L11 to carry out purifying treatment to the first dusty gas and the second dusty gas.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (8)
1. a pyrolysis water distilling apparatus, comprising:
Still kettle;
Material inlet, is arranged on the top of described still kettle;
Stir shaft, the length direction along described still kettle runs through and is arranged in described still kettle;
At least one doctor assemblies, to be arranged on described stir shaft and with the contact internal walls of described still kettle;
Electromagnetic induction heater, is arranged on the outside of described still kettle, and described still kettle is in the alternating magnetic field of described electromagnetic induction heater generation;
At least one slag-drip opening, is arranged on the bottom of described still kettle.
2. pyrolysis water distilling apparatus according to claim 1, is characterized in that, described doctor assemblies comprises scraper, doctor blade frames, union lever, elastic component and skeleton; Described skeleton is fixed on described stir shaft; One end of described union lever is connected in described skeleton slidably, and the other end of described union lever is fixedly connected in described doctor blade frames; Described elastic component is set on the described union lever between described doctor blade frames and described skeleton, and by the inwall upper offset of described scraper to described still kettle.
3. pyrolysis water distilling apparatus according to claim 2, is characterized in that, described scraper tilts relative to the inwall of described still kettle and becomes angle with the inwall of described still kettle.
4. pyrolysis water distilling apparatus according to claim 1, is characterized in that, described electromagnetic induction heater comprises the toroidal coil that at least one has elongated shape, and described toroidal long axis direction is consistent with the length direction of described still kettle.
5. the pyrolysis water distilling apparatus according to claim 1 or 4, is characterized in that, is provided with insulated thermal insulating layer between described still kettle and described electromagnetic induction heater.
6. pyrolysis water distilling apparatus according to claim 1, is characterized in that, also comprise temperature probe, and described temperature probe is connected with described stir shaft by slip ring, and is configured to static relative to described still kettle.
7. pyrolysis water distilling apparatus according to claim 1, is characterized in that, the mounting seat of described slag-drip opening valve adopts the mode of closing with the embedding reef knot of described still kettle inwall to be arranged in described still kettle.
8. the pyrolysis water distilling apparatus according to claim 1 or 7, is characterized in that, at least one slag-drip opening described is multiple, and multiple described slag-drip opening is along the length direction spread configuration of described still kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784358.8U CN205223117U (en) | 2015-10-10 | 2015-10-10 | Pyrolysis distillation plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784358.8U CN205223117U (en) | 2015-10-10 | 2015-10-10 | Pyrolysis distillation plant |
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| CN205223117U true CN205223117U (en) | 2016-05-11 |
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| CN201520784358.8U Expired - Fee Related CN205223117U (en) | 2015-10-10 | 2015-10-10 | Pyrolysis distillation plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273278A (en) * | 2018-03-14 | 2018-07-13 | 王周林 | A kind of rotor and industrial wastes drain sump of industrial wastes drain sump rabbling mechanism |
| CN109482811A (en) * | 2018-12-12 | 2019-03-19 | 东风精密铸造有限公司 | A kind of quick recycling equipment of totally-enclosed wax material of hot investment casting |
| CN109956641A (en) * | 2019-04-29 | 2019-07-02 | 常州大学 | A kind of intermediate frequency electromagnetic induction heating apparatus of improved processing oily sludge |
| CN111056721A (en) * | 2020-01-06 | 2020-04-24 | 重庆科技学院 | Oily sludge segmented continuous pyrolysis experimental device |
-
2015
- 2015-10-10 CN CN201520784358.8U patent/CN205223117U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273278A (en) * | 2018-03-14 | 2018-07-13 | 王周林 | A kind of rotor and industrial wastes drain sump of industrial wastes drain sump rabbling mechanism |
| CN109482811A (en) * | 2018-12-12 | 2019-03-19 | 东风精密铸造有限公司 | A kind of quick recycling equipment of totally-enclosed wax material of hot investment casting |
| CN109956641A (en) * | 2019-04-29 | 2019-07-02 | 常州大学 | A kind of intermediate frequency electromagnetic induction heating apparatus of improved processing oily sludge |
| CN111056721A (en) * | 2020-01-06 | 2020-04-24 | 重庆科技学院 | Oily sludge segmented continuous pyrolysis experimental device |
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