CN105670666B

CN105670666B - The combined unit of low-order coal catalytic degradation and use its method

Info

Publication number: CN105670666B
Application number: CN201610201300.5A
Authority: CN
Inventors: 张乾; 梁丽彤; 黄伟; 刘建伟; 申浩
Original assignee: Taiyuan University of Technology
Current assignee: Taiyuan University of Technology
Priority date: 2016-04-01
Filing date: 2016-04-01
Publication date: 2018-06-15
Anticipated expiration: 2036-04-01
Also published as: CN105670666A

Abstract

The invention discloses a kind of combined unit of low-order coal catalytic degradation and using its method, belong to derived energy chemical field.The combined unit includes coal sample pyrolytic reaction device, raw gas refrigerated separation device and semicoke cooling collection device, the raw gas refrigerated separation device and semicoke cooling collection device are connect with coal sample pyrolytic reaction device, wherein, the combined unit further includes coal sample screening catalytic unit, coal sample screening catalytic unit is connect with the entrance of coal sample pyrolytic reaction device, and coal sample screening catalytic unit includes housing and the double-deck screen shale shaker separating device being arranged in the housing, double-deck screen shale shaker separating device passes through the double-deck coal sample particle for sieving the acquisition of low-order coal coal sample and meeting catalytic pyrolysis reaction.The combined unit of low-order coal catalytic degradation provided by the invention and catalyst can be uniformly sprayed on coal particle in the vibration processes after coal sample screening, while maximum is realized by auxiliary agent osmosis and obtains tar, pyrolysis gas and semicoke product using its method.

Description

The combined unit of low-order coal catalytic degradation and use its method

Technical field

The present invention relates to derived energy chemical fields, the more particularly to combined unit of low-order coal catalytic degradation and its side of use Method.

Background technology

China is the country of a rich coal, oil starvation, few gas, and coal accounts for 70% or so of Chinese primary energy total quantity consumed, And in the period of future is considerably long, coal will occupy leading position in energy resource structure.Low-order coal（It is such as lignite, secondary Bituminous coal）It accounts for China and has verified more than the 55% of coal reserves, contain the petroleum resources that volatile matter therein is equivalent to 100,000,000,000 tons. But since low-order coal has water content height（About 20%~60%）, volatile matter is high, calorific value is low, easy-weathering and the features such as spontaneous combustion, Therefore it is unfavorable for long distance delivery and storage, and can only process change on the spot.

At present, low-order coal is mostly used to make fuel or power generation raw material, causes the wasting of resources in this way, environmental pollution is serious.Foundation Coal pyrolysis is gas by medium/low temperature coal pyrolysis technology by the composition and structure feature of low-order coal（Pyrolysis gas）, liquid （Medium/low temperature coal tar）And solid（Blocky or powdery semicoke）, further according to its respective different physicochemical property, carry out sub-prime conversion It utilizes, and step sub-prime conversion profit is constantly further carried out according to the physicochemical property of all kinds of converted products and the difference of quality With, final " sub-prime conversion, the cascade utilization " realized to low-order coal trans-utilization overall process, have to China important economy and Strategic importance.

Pyrolysis is to extract the important method of petroleum resources in coal, therefore does not develop high-efficiency thermal decomposition technology significance naturally not It says and explains.But the deficiency of the complexity and relevant rudimentary and key project Study on Problems due to texture of coal, advanced pyrolysis of coal Technology there is no the device that stabilization of industry is run.At present, external typical pyrolytic process of coal includes：The Toscoal technologies in the U.S., Encoal technologies, LFC technologies, COED technologies and Garrett technologies etc., also Canadian ATP technologies, German Lurgi- Coal fast pyrolysis technology of Ruhr technologies, CSIR's O technologies of Australia and Japan etc..Domestic typical pyrolytic process of coal There is the lignite hot solid carrier devolatilization that Dalian University of Technology develops（DG）Multi-production process, Beijing Coal scientific research Zong Yuan Beijing The multistage rotary furnace of coal chemical industry branch exploitation（MRF）Pyrolytic process, Zhejiang University and Tsinghua University develop jointly with fluid bed Circulating fluidized bed heat-power multi-production process, Beijing power economy research institute and Chinese Academy of Sciences's Engineering Thermophysics based on pyrolysis The thermoelectricity gas multi-production process based on moving bed of research institute, the multiple-supplying technique of Jinan Boiler Plant, Chinese Academy of Sciences mountain Western coalification and Chinese Academy Of Sciences Process Engineering Research Institute " coal plug technique " etc..

Although many to the type of pyrolytic process research both at home and abroad at present, it is substantially all in pilot scale or Industrial demonstration rank Section, the so far still commercialized running technology without extensive pyrolysis of coal.Key problem present in existing pyrolytic process is：Pyrolysis The gas-liquid product yield of process is not high, and quality is relatively low, and dust content is high especially in pilot-plant, and tar yield is low, and matter Measure it is poor, thus fail realize technological break-through.Many pilot scales and result of industrial test show：Major part pyrolytic process institute at present Asphalt content in the tar of generation is up to more than 50%, and the heavy component in tar not only reduces the grade of coal-derived oils And value, the probability that dust is mixed with coal tar is also increased, thereby increases separating difficulty, so as to cause a series of work Industry operation problem hinders the commercial applications of pyrolytic technique.Therefore, extensive coal sub-prime utilizes project pyrolysis urgently to be resolved hurrily Technique is unstable, jejune problems.

Invention content

In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the present invention provides one kind The combined unit of low-order coal catalytic degradation and use its method.The technical solution is as follows：

It is an object of the present invention to provide a kind of combined units of low-order coal catalytic degradation.

It is a further object of the present invention to provide a kind of methods of the combined unit using low-order coal catalytic degradation.

According to an aspect of the invention, there is provided a kind of combined unit of low-order coal catalytic degradation, the combined unit Collection device, the raw gas refrigerated separation are cooled down including coal sample pyrolytic reaction device, raw gas refrigerated separation device and semicoke The outlet of device and semicoke cooling collection device with the coal sample pyrolytic reaction device is connect, wherein,

The combined unit further includes coal sample screening catalytic unit, and the coal sample screening catalytic unit is pyrolyzed with the coal sample The entrance connection of reaction unit, and coal sample screening catalytic unit includes housing and the double-deck vibration being arranged in the housing Screening plant, the double-deck screen shale shaker separating device sieve the low-order coal coal sample acquisition by bilayer and meet catalytic pyrolysis reaction Coal sample particle.

Specifically, the double-deck screen shale shaker separating device includes the first vibration screen and is arranged under first vibration screen Second vibration screen of side, first vibration screen and the second vibration screen are set, and institute along the longitudinally of the housing The mesh size for stating the first vibration screen is more than the mesh size of the second vibration screen,

When in use, low-order coal coal sample passes sequentially through the first and second vibration screen vibrosieves, and passes through described second The coal sample that vibration screen vibrosieve obtains is the coal sample particle for meeting catalytic pyrolysis reaction,

The outlet of the first coal sample and the outlet of the second coal sample are provided on coal sample screening catalytic unit, passes through described first Coal sample outlet is by the coal sample particle on the first vibration screen collected in the end of coal sample screening catalytic unit and falls within housing Coal sample particle on bottom plate removes the coal sample screening catalytic unit, will be in the described second vibration by second coal sample outlet Coal sample particle that the end of sieve is collected and on the second vibration screen removes the coal sample screening catalytic unit.

Further, the coal sample screening catalytic unit further includes catalysis spray equipment, and the catalysis spray equipment includes Shell, at least one spray thrower, oscillating plate and catalyst storage tank, all spray throwers and vibration at least one spray thrower Plate is arranged in the shell, and all spray throwers are arranged at the top of the oscillating plate, and all sprays Leaching device is connect with the catalyst storage tank.

The catalysis spray equipment is arranged at intervals with the double-deck screen shale shaker separating device and positioned at the double-deck screen shale shaker point Device end, the catalyst solution amount of spray and the mass ratio of coal sample are arranged in the range of 0.1 ~ 10wt%, the spray Catalyst increase oily catalyst for water type low-order coal catalytic degradation, when in use, the catalyst is equably sprayed to shake described In screened good coal sample on movable plate.

Specifically, the coal sample after the catalyst sprays and stands is transported to the coal sample pyrolytic reaction device In entrance, the coal sample pyrolytic reaction device includes inner casing, shell and spiral pushing device, and the inner casing is set inside the shell, The spiral pushing device is arranged in the inner cavity of the inner casing；

It is additionally provided with to export the gas that the coal sample in the inner casing is passed through pyrolytic reaction and obtained at the top of the inner casing With multiple export channels of tar, inner cavity of the multiple one end for exporting channel with the inner casing connects, the multiple to lead Go out busway and the raw gas refrigerated separation device of the other end of channel via the longitudinally arrangement along the inner casing Connection, the multiple each export channel exported in channel are set along direction of the longitudinally perpendicular to the inner casing It puts, one another around annular chamber is formed between the inner casing and shell, the annular chamber is used for the coal of the interior intracavitary to the inner casing Sample provides heat.

Further, the first end of the spiral pushing device and entrance one end far from the coal sample pyrolytic reaction device It is fixedly connected, the longitudinally of the spiral pushing device second end opposite with first end along the inner casing is extended to outside described Shell and with the shell magnetic seal；

Circulating water cooling device, and the second end of the spiral pushing device are arranged in the second end of spiral pushing device It is connect with motor by gear, is also set on one end close to the circulating water cooling device of the coal sample pyrolytic reaction device At least one coal scuttle is equipped with, correspondingly in the other end far from the circulating water cooling device of the coal sample pyrolytic reaction device On be provided with semicoke outlet, all coal scuttles at least one coal scuttle are entering for the coal sample pyrolytic reaction device Mouthful, the semicoke outlet is connect with the entrance of semicoke cooling collection device；

Star-like feeder is provided on one end of the inner cavity of the connection inner casing of the coal scuttle, and in coal sample heat Solve the adjusting supporting rack that the angle for adjusting the coal sample pyrolytic reaction device is provided with below reaction unit, the spiral Propulsion device is with center bolt axial screw or Shaftless spiral blade, the spiral with center bolt axial screw Propulsion device is also associated with heating unit.

Further, the raw gas refrigerated separation device includes sequentially connected cyclone separator, level-one tar condensing Device, two level tar condenser, gas purifier and gas container, one end of the cyclone separator connect with the busway It connects, and the other end of the cyclone separator is connect with one end of level-one tar condenser, the level-one tar condenser and two Tar well is respectively connected with below grade tar condenser, between the gas purifier and the two level tar condenser It is additionally provided with aspiration pump；

Fine powder collector is connected with below the cyclone separator, and the tar well is collected for washing tar Device, tar elution collector or electric tar well.

Specifically, the semicoke cooling collection device includes at least one level-one semicoke collector being connected to each other and two level Semicoke collector, at least one level-one semicoke collector the entrance of all level-one semicoke collectors with the coal sample The semicoke outlet connection of pyrolytic reaction device, the outlet of all level-one semicoke collectors are collected with the two level semicoke Device connects,

High temp.-resistant valve is both provided in the entrance and exit of the level-one semicoke collector, in all level-ones half Inert gas input port, the Inert gas input port and inert gas are both provided on burnt collector and two level half-angle collector Purge system connects.

According to another aspect of the present invention, the present invention also provides a kind of combined units using low-order coal catalytic degradation Method, this method include the following steps：

（1）The coal sample ground is conveyed into the coal sample screening catalytic unit and passes through the double-deck screen shale shaker separating device It carries out screening and obtains the coal sample particle for meeting catalytic pyrolysis reaction；

（2）The coal sample particle by being catalyzed spray equipment is sprayed to the catalyst of certain load capacity, passes through vibration later It is spare that plate is conveyed into the standing predetermined time in coal-storage pot；

（3）By the coal sample after standing be conveyed into coal sample pyrolytic reaction device carry out pyrolytic reaction and generate gas, tar and Particle dust, while coal sample forms semicoke, the gas, tar and particle dust are filled into the raw gas refrigerated separation In putting, the semicoke is pushed into semicoke by spiral pushing device and cools down in collection device；

（4）The gas, tar and particle dust are detached, and institute after raw gas refrigerated separation device is entered It states gas and tar enters level-one tar condenser and two level tar condenser carries out condensation and forms burnt oil and gas, the coal gas It is purified and entered in gas holder by gas purifier, the particle dust is collected by fine powder collector；

（5）Semicoke is collected by level-one semicoke collector all at least one level-one semicoke collector, is fallen into later In two level semicoke collector.

Specifically, in step（4）In, gas, tar will be contained to being separated into for the gas, tar and particle dust Sprinkling is passed through to carry out cooling removing tar and pulverized coal particle in misty water with the mixture of particle dust；

Or most of solid particle in the mixture is first removed by cyclone separator, pass through water cooling, liquid later The cooling of phase tar light oil, cold ammonia cooling or electrically trapped tar oil mode carry out gas and tar separation.

Further, the two level semicoke collector by semicoke by recirculated water cooling mode or cold quenching, directly fall into water In mode realize semicoke cool down.

The combined unit of low-order coal catalytic degradation according to the present invention and in being had the following advantages using its method extremely It is one few：

（1）The combined unit of low-order coal catalytic degradation provided by the invention and it can sieve it in coal sample using its method Catalyst is sprayed into vibration processes afterwards so that coal sample as much as possible can be contacted with catalyst, to ensure to be catalyzed Agent is uniformly sprayed on coal particle, while by the osmosis of auxiliary agent, realizes the effect that coal is in close contact with catalyst；

（2）The combined unit of low-order coal catalytic degradation provided by the invention and the adding by catalyst using its method Add, improve the tar yield of coal sample catalytic degradation, and maximum improve the yield of high value added product；

（3）The combined unit of low-order coal catalytic degradation provided by the invention and pass through coal sample pyrolytic reaction using its method The rotation of the screw rod of auger device drives in device, by coal sample particle with suitable rate in the reactor gradually forward It advances, and is gradually evenly heated, to ensure that pyrolytic reaction can fully occur for coal sample；

（4）Changing indirectly employed in the combined unit of low-order coal catalytic degradation provided by the invention and the method using it Heat pattern, due to not having the generation of semicoke or gas combustion reaction, ensures that acquisition product compared with spontaneous combustion heating mode Purity and yield, and with foreign gas heat compared with, also reduce gas separation difficulty and cost；

（5）The combined unit of low-order coal catalytic degradation provided by the invention and can be suitable by introducing using its method Reaction atmosphere increases the extent of reaction of catalytic degradation, then improves the yield and quality of product；

（6）It the combined unit of low-order coal catalytic degradation provided by the invention and is acted on using its method by minute-pressure, it will Light gas and hot tar gas import raw gas refrigerated separation device in time, can either avoid tar due to being short of power Cooling blocks pipeline, and can obtain higher tar yield on tube wall.

Description of the drawings

The these and or other aspects and advantage of the present invention will become from description of preferred embodiments below in conjunction with the accompanying drawings It obtains significantly and is readily appreciated that, wherein：

Fig. 1 is the structure diagram of the combined unit of low-order coal catalytic degradation according to an embodiment of the invention；

Fig. 2 is the structure diagram of coal sample screening catalytic unit shown in FIG. 1；

Fig. 3 is the structure diagram of coal sample pyrolytic reaction device shown in FIG. 1；

Fig. 4 is the structure diagram of the raw gas refrigerated separation device shown in figure；

Fig. 5 is the structure diagram of semicoke cooling collection device shown in FIG. 1；

Fig. 6 is the flow of the method for the combined unit using low-order coal catalytic degradation according to another embodiment of the present invention Figure.

Wherein, the combined unit of 100 low-order coal catalytic degradations, 10 coal sample pyrolytic reaction devices, 11 coal sample pyrolytic reactions dress The inner casing put, 111 flow-guiding channels, the outlet of 112 semicokes, 113 air inlet pipelines, 114 busways, 12 coal sample pyrolytic reaction devices Shell, 13 spiral pushing devices, 131 circulating water cooling devices, 132 gears, the first end of 133 helical axis, the of 134 helical axis Two ends, 14 motors, 15 coal scuttles, 16 adjust supporting rack, 17 star-like feeders, 20 raw gas refrigerated separation devices, 21 cyclonic separations Device, 22 level-one tar condensers, 23 two level tar condensers, 24 gas purifiers, 26 tar wells, 27 aspiration pumps, 28 is thin Powder collector, 30 semicokes cooling collection device, 31 level-one semicoke collectors, 311 Inert gas input ports, 32 two level semicokes are collected Device, 33 high temp.-resistant valves, 40 coal samples screening catalytic unit, 41 coal samples sieve the housing of catalytic unit, the packing of 42 double-deck screen shale shakers It puts, 421 first vibration screens, 422 second vibration screens, 43 catalysis spray equipments, the shell of 431 catalysis spray equipments, 432 sprays Drench device, 433 oscillating plates, 434 catalyst storage tanks.

Specific embodiment

1-6 below by way of examples and with reference to the accompanying drawings, the technical solutions of the present invention will be further described. In specification, the same or similar drawing reference numeral indicates the same or similar component.Following reference attached drawings are to embodiment party of the present invention The explanation of formula is intended to explain the present general inventive concept of the present invention, and is not construed as a kind of limitation to the present invention.

The combined unit 100 of low-order coal catalytic degradation provided by the invention includes coal sample screening catalytic unit 40, coal sample heat Reaction unit 10, raw gas refrigerated separation device 20 and semicoke cooling collection device 30 are solved, coal sample screening catalytic unit 40 is used for Coal sample after crushing is sieved, to obtain the coal sample for being suitable for being pyrolyzed raw materials used particle size range, and is partially completed at this The addition of catalyst and standing task.Coal sample pyrolytic reaction device 10, should for the coal sample being pyrolyzed after addition catalyst and standing Coal sample pyrolytic reaction device 10 can also carry out heat supply by way of external firing semicoke, and making the coal sample, portion occurs in the device Catalytic degradation reacts and obtains pyrolysis coal gas, tar and semicoke.Raw gas refrigerated separation device 20 and semicoke cooling collection device 30 are connected on coal sample pyrolytic reaction device 10, be respectively used to take out of and detach coal sample pyrolysis caused by tar and gas and Cool down semicoke.Here, the catalyst that adds of the present invention can be in the catalyst described in Chinese patent CN103831113, Therefore, this will not be detailed here.

It is well known that a problem existing for existing pyrolysis of coal device is the obtained tar poor quality of pyrolysis of coal, The reason is that containing a large amount of fines or semicoke in tar, and during existing pyrolysis of coal device is used, tar With fine powder be also easy to block pipeline, so as to cause existing pyrolysis of coal device can not continuous operation, and another problem be pyrolysis For gas composition by the larger of carrier gas or other types gas dilution, pyrolysis gas calorific value is low.The low-order coal provided of the present invention is provided The combined unit 100 of catalytic degradation can solve two above-mentioned technical problems.

Referring to Fig. 1, it illustrates the combined units 100 of low-order coal catalytic degradation according to an embodiment of the invention. Combined unit 100 includes coal sample pyrolytic reaction device 10, raw gas refrigerated separation device 20 and semicoke cooling collection device 30, slightly The outlet of coal gas refrigerated separation device 20 and semicoke cooling collection device 30 with coal sample pyrolytic reaction device 10 is connect.Specifically Ground, with reference to shown in Fig. 2, combined unit 100 further includes coal sample screening catalytic unit 40, coal sample screening catalytic unit 40 and coal sample heat The entrance connection of reaction unit 10 is solved, and coal sample screening catalytic unit 40 includes housing 41 and the double-layer vibration being arranged in housing 41 Dynamic screening plant 42, double-deck screen shale shaker separating device 42 pass through the double-deck coal for sieving the acquisition of low-order coal coal sample and meeting catalytic pyrolysis reaction Sample particle.

As shown in Fig. 2, double-deck screen shale shaker separating device 42 includes the first vibration screen 421 and is arranged on the first vibration screen Second vibration screen 422 of 421 lower sections.First vibration screen 421 and the second vibration screen 422 are set along the longitudinally of housing 41 It puts, and the mesh size of the first vibration screen 421 is more than the mesh size of the second vibration screen 422.From there through the first vibration The design of 421 and second vibration screen 422 of sieve can make coal sample in the vibration force of vibrator and the joint from gravity of material Under effect, move in a straight line forward to great-jump-forward.Coal sample particle vibration dispersion on sieve, big coal sample particle have stayed in upper strata The first vibration screen 421 on, and meticulous coal sample particle screening is leak under the second vibration screen 422 of lower floor（That is bottom plate On）, so as to leave the coal sample particle for being suitable for this type catalytic depolymerization reaction on the second vibration screen 422 of lower floor.

In the example of the present invention, the outlet of the first coal sample is provided on coal sample screening catalytic unit 40（It is not shown） It is exported with the second coal sample（It is not shown）.Bulky grain on first vibration screen 421 on upper strata and fall within coal sample screening catalysis dress The coal sample particle put on the bottom plate of 40 housing 41 is sieved similary for linear motion on catalytic unit 40 and is transferred in coal sample It collects respectively the end of first vibration screen 421.Such as first on vibration screen 421 and by 421 end of the first vibration screen The coal sample particle of the bulky grain of collection can be exported by the first coal sample removes coal sample screening catalytic unit 40, in the second vibrating screen Coal sample particle that is on net 422 and being collected by 422 end of the second vibration screen can be exported by the second coal sample and move to catalysis spray Shower device 43.

When coal sample is used to sieve catalytic unit 40, the coal sample after coal-grinding crushes enters under the action of conveying device should In coal sample screening catalytic unit 40.Since the sieve diameter of the first vibration screen 411 and the second vibration screen 422 can be according to reality The condition of testing can flexible modulation, therefore the particle size range of coal sample can be fed by the aperture adjustment of adjustable screen, such as can be by the First, the pore size control of the second vibration screen is between 3 ~ 50mm ranges, and the grain size of such coal sample particle can also control 3 ~ In the range of 50mm, to obtain the coal sample particle in the range of more uniform grading.This example is only a kind of illustrated examples, ability Field technique personnel can correspondingly be adjusted as needed.

With continued reference to Fig. 2, catalysis spray equipment 43 is also equipped in the latter end of coal sample screening catalytic unit 40.Namely It says, catalysis spray equipment 43 is arranged at intervals with double-deck screen shale shaker separating device 42 and is located at 42 end of double-deck screen shale shaker separating device, Catalysis spray equipment 43 is fixed on the bottom section of screening part, and is separated with oscillating component, because being influenced without being vibrated by device.And And catalyst can be equably sprayed to the coal sample particle rolled in oscillating plate latter end by the design by being catalyzed spray equipment 43 On, so as to realize that catalyst more uniformly adds.In another example of the present invention, coal sample screening catalytic unit can be with Separately assembling is coal sample screening plant and catalysis spray equipment, you can with using individual coal sample screening plant and catalysis spray dress It puts.And catalysis spray equipment at this time equally includes coal sample vibrating transportation module, but be not required to set to the sieve plate with sieve pore or Sieve only need to set the tablet for being likewise supplied with vibrating function, and have the device of catalyst spray correlation function.This field Technical staff is to be further understood that coal sample screening plant and is catalyzed the coal sample screening catalysis dress that spray equipment can be integrally formed It puts, i.e., coal sample screening plant and catalysis spray equipment are respectively a part for coal sample screening catalytic unit, this example is only a kind of Illustrated examples, those skilled in the art can correspondingly be selected as needed.

Specifically, catalysis spray equipment 43 includes shell 431, at least one spray thrower 432, oscillating plate 433 and catalyst Storage tank 434.All spray throwers 432 and oscillating plate 433 are arranged in shell 431 at least one spray thrower 432, all Spray thrower 432 is arranged at the top of oscillating plate 433, and all spray throwers 432 are connect with catalyst storage tank 434.At this In an also example for invention, spray thrower 432 is nozzle, as shown in Fig. 2, nozzle is fixed on the vibration of the second vibration screen latter end coal sample It rolls above position, one end of nozzle is connect with catalyst storage tank 434.It will be understood by those skilled in the art that spray thrower 432 is also Other types of spray equipment is could be provided as, and the quantity of spray thrower and position can be adjusted according to experiment condition, such as Spray thrower could be provided as 2,5 or more, this example is only an illustrated examples, and those skilled in the art should When be interpreted as to the present invention a kind of limitation.In the example of the present invention, spray flow rate, spraying range and the sprinkling of nozzle Intensity can spray the progress of piece diameter by controlling in the pressure of catalyst storage tank 434, the aperture of the valve of control nozzle and nozzle It adjusts.

At the end of coal sample particle vibration motion to coal sample screening catalytic unit 40, on coal sample tip vibration position The catalysis spray equipment 43 of side starts equably to spray catalyst, and such coal sample can be catalyzed in the load simultaneously of the forward ground of vibration Agent.In the example of the present invention, the catalyst sprayed increases oily catalyst for a kind of water type low-order coal catalytic degradation, contains There are one or more ingredients such as Ni, Fe, Al, Zn, and under promoter effect, catalyst soluble, thus can be straight in aqueous solution Tap into capable spray.There is preferable improve to be catalyzed coal thermal transition efficiency, that is, had apparent by this development in laboratory for used catalyst Improve the effect of tar yield and upgrading tar quality.The catalyst solution amount and the mass ratio of coal sample sprayed be about 2 ~ 10wt% about needs the catalyst for being dissolved in water of 2 ~ 10kg of spray, the net content of catalyst and the quality of coal sample per 100kg coal samples Than<0.5wt%.

With continued reference to Fig. 2, coal sample feeding mouth is provided on shell 431（It is not shown）With coal sample discharge port（It is not shown）. The one end of coal sample feeding mouth respectively with the outlet of the second coal sample and oscillating plate 433 is connect, and the other end and the coal sample of oscillating plate 433 discharge The inside connection of mouth, is connected at least one coal storage for standing the coal sample after spraying catalyst on the outside of coal sample discharge port Tank（It is not shown）.In another example of the present invention, the end coal sample discharge outlet of catalytic unit 40 is sieved in coal sample, equipped with three A coal-storage pot.The first coal-storage pot of the coal sample after collecting spray catalyst is realized, for standing the coal sample after spraying catalyst The second coal-storage pot, for coal sample to be put into the third coal-storage pot of 10 front end of coal sample pyrolytic reaction device.People in the art Member it will be appreciated that coal-storage pot could be provided as 1,2 or more, those skilled in the art can according to actual needs into Row correspondingly adjusts.Being equipped in each coal storage pot bottom can valve opening door, the in this way coal sample after spray catalyst and standing It is fallen into coal sample warehouse by opening valve.And all coal-storage pots are placed on a disk, can realize in this way it is automatic or Manual switching rewinding, blowing, movement function, to realize the automation mechanized operation at coal-storage pot.When in use, after spraying catalyst Coal sample continue move ahead after drop into correspondingly coal-storage pot.After about 30min is stood in coal-storage pot, coal sample falls into coal-storage pot Among the coal sample warehouse of lower section, the entrance of coal sample pyrolytic reaction device 10 is delivered into through belt or screw conveyor（That is coal scuttle 15）Among.

With reference to shown in Fig. 1 and Fig. 3, coal sample pyrolytic reaction device 10 includes inner casing 11, shell 12 and spiral pushing device 13, Inner casing 11 is arranged in shell 12, and spiral pushing device 13 is arranged in the inner cavity of inner casing 11.Specifically, coal sample pyrolytic reaction fills Put two layers, wherein internal layer inside and outside 10 main furnace body point（That is the inner cavity of inner casing 11）For pyrolysis reaction region, coal sample occurs fully herein Pyrolytic reaction, and outer layer（The annular chamber formed between shell 12 and inner casing 11）For combustion heat supplying area, the lower fine powder of sieve is utilized The high temperature hot gas heating furnace that coal or hot coal-char combustion generate transfers heat to furnace interior by furnace wall, ensures pyrolytic reaction heat The ample supply of amount.And penetrating fine breeze may be used in outer layer heating or the mode of coal-char combustion directly heats, the ash after burning Divide and gather and discharge with bottom of furnace body, to improve the thermal efficiency.In the example of the present invention, coal sample pyrolytic reaction device 10 Interior stove part（That is inner casing 11）It, in this way can be as desired by recent 113 casees inner casings of pipeline 11 equipped with air inlet pipeline 113 Corresponding carrier gas or reaction gas are passed through in chamber.

Coal sample pyrolytic reaction device 10 the parallel dress in upper end there are two coal scuttle 15.One end of each coal scuttle 15 and inner casing 11 inner cavity connection, the other end of coal scuttle 15 are connected with all coal-storage pots.Gate valve is respectively arranged on the top of each coal scuttle 15, After a certain amount of coal sample falls into coal scuttle, upper end gate valve is closed.15 inside of coal scuttle is equipped with inert gas purge system simultaneously（Not It shows）, the air brought by outside in coal sample can be replaced away.In the lower section of each coal scuttle 15 connection inner casing 11 Star-like feeder 17 is respectively arranged on one end.Coal sample after substitution gas is by star-like feeder 17 according to certain coal rate by coal Sample is sent into the inner cavity of inner casing 11.When in use, two coal scuttles automatically switch, and are used alternatingly, that is to say, that when a coal scuttle exists During the coal sample collected Belt Conveying and come, coal sample is then conveyed into inside pyrolysis main reactor by another coal scuttle 15, and vice versa. It will be understood by those skilled in the art that coal scuttle 15 could be provided as 1,3 or more, this example is only a kind of illustrative Example, those skilled in the art can be selected accordingly as needed.

It is pushed away as shown in figure 3, being provided with spiral along the longitudinally of inner casing 11 in 10 inner casing 11 of coal sample pyrolytic reaction device Into device 13.In another example of the present invention, spiral pushing device 13 is as needed using with center bolt axial screw Or Shaftless spiral blade, the spiral pushing device with center bolt axial screw are also associated with heating unit（It is not shown）.Example Such as when using with center bolt axial screw, electric heating body can be equipped in central screw shaft, in this way after reaction starts, in Heart screw shaft can be heated to realize preferably heat transfer, promote the pyrolytic reaction of coal sample.In use, it is pushed away in spiral Into under the promotion of device 13, coal sample is disperseed from the inlet of coal sample pyrolytic reaction device 10, is rolled, and along the lengthwise side of inner casing 11 To the end for moving to coal sample pyrolytic reaction device 10.

The first end 133 of the helical axis of spiral pushing device 13（That is end）It is fixed in coal sample pyrolytic reaction device 10 Portion, and the first end 133 is arranged far from one end of the inlet of coal sample pyrolytic reaction device 10；Helical axis and first end 133 opposite second ends 134（That is front end）Along the longitudinally of inner casing 11 stretch out shell 12 it is outer and with 11 magnetic seal of shell, and Axially it is being welded with gear 132.Certain those skilled in the art can also adopt to be used in the junction of second end 134 and shell 11 High-temperature resistant seal ring is sealed.This example is only a kind of illustrated examples, and those skilled in the art are not construed as to this A kind of limitation of invention.

In the also example of the present invention, the second end 134 of spiral pushing device 13 is connected by gear 132 and motor 14 It connects so that motor bearings can be rotated in rotation with moving gear 132, it is achieved thereby that the rotation of spiral pushing device 13.And Since motor is connected to frequency converter, rotating speed is adjusted, so as to control and adjust coal sample delivery rate.The one of the present invention In a example, circulating water cooling device 131 is provided at the magnetic seal of the second end 134 of spiral pushing device 13 so that Circulating water may be used at this to ensure sealing effect.In another example of the present invention, two coal scuttles are arranged at spiral shell The top of the second end 134 of propulsion device 13 is revolved, semicoke outlet is provided in the lower section of the first end 133 of spiral pushing device 13 112, semicoke outlet 112 is connect with the entrance of semicoke cooling collection device 30.It is pushed and in inner casing through spiral pushing device in this way It is semicoke to be fully pyrolyzed when coal sample to the semicoke outlet 112 fully reacted is heated in 11 inner cavity, later from the discharge of this mouth simultaneously It falls into the semicoke collector of lower section.

As shown in figure 3, it is opened at the different location on the top of the inner casing 11 and shell 12 of coal sample pyrolytic reaction device 10 It is useful for multiple flow-guiding channels 111 that gas and tar are collected.The opening of flow-guiding channel and the water conservancy diversion on shell 12 on inner casing 11 The opening of channel corresponds to each other setting.The flow-guiding channel of different numbers, different spacing can be opened up according to reacting furnace-e/or length, The gas vent of flow-guiding channel is nearby and outlet section is tied with heat-preservation cotton, while be also tied with electric furnace heating wire, passes through heat-preservation cotton and electric furnace The design of silk can if necessary heat the gas in flow-guiding channel and tar, to ensure that gas and tar do not exist This section condenses, aggregation.Multiple flow-guiding channels 111 are collected to busway 114, and gas collected later and tar are through converging The General Logistics Department is flowed into raw gas refrigerated separation device 20.Pass through two layers of housing inside and outside being designed on the type coal sample pyrolytic reaction device With multiple flow-guiding channels so that the catalytic degradation experiment conducted in the coal sample pyrolytic reaction device can not only make coal sample It is evenly heated catalytic pyrolysis, additionally it is possible to gas and tar obtained by separation pyrolyzing are taken out of in time, so as to fulfill middle low order pyrolysis of coal work The stable operation of skill, and obtain the coal gas and semicoke of high yield, the tar of original text quality and higher thermal value.

In the also example of the present invention, busway 114 is set along the longitudinally of coal sample pyrolytic reaction device 10, more A export channel 111 is sequentially arranged along the longitudinally of coal sample pyrolytic reaction device 10, and each in multiple export channels 111 A export channel is along the direction setting of the longitudinally perpendicular to inner casing 11.In the example of the present invention, coal sample pyrolysis Multiple export channels 111 of reaction unit 10 can connect different raw gas refrigerated separation devices 20 respectively, be collected with capturing Gas and tar product obtained by the differential responses stage.In another example of the present invention, in coal sample pyrolytic reaction device 10 Lower section be provided with for adjust coal sample pyrolytic reaction device 10 angle adjusting supporting rack 16.In the also example of the present invention In, it can decide whether to carry out predrying coal according to the moisture of input coal sample particle at coal sample pyrolytic reaction device 10 Sample.If coal sample initial water content is higher, the mode first dried and entered afterwards in coal sample pyrolytic reaction device 10 can be used.Drying device The device identical with coal sample pyrolytic reaction 10 structures of device can be used, forced air drying, roller drying, vapour seasoning can also be used Etc. modes.

After the coal sample from coal sample screening catalytic unit 40 enters in the coal scuttle 15 of coal sample pyrolytic reaction device 10, the coal Sample is passed through inert atmosphere fully to exclude air therein in coal scuttle 15, removes the coal sample of air later through star-like feeder 17 It is fed according to given pace, and enters in the inner casing 11 of coal sample pyrolytic reaction device 10 and reacted.Coal sample in inner casing 11 by The high-temperature flue gas that part coal-char combustion generates heats it in the annular chamber between inner casing 11 and shell 12, makes entire reacting furnace Inside reach a certain steady temperature（The reaction temperature is between 500 ~ 900 DEG C）.

Coal sample into inner casing 11 starts to warm up under the heating of annular chamber high temperature flue gas, and it is anti-that removing moisture occurs first Should, it is exported so as to the water generated and by the export channel 111 nearest from the position.Coal sample is made in the propulsion of spiral pushing device 13 Continue to push ahead under, and continuous heat temperature raising in the process, reach pyrolysis reaction temperature section, and in catalyst Under effect, catalytic thermal depolymerization reaction occurs.The tar and gas generated through catalytic thermal depolymerization reaction is by exporting channel 111 Export.Coal sample institute's residence time in the inner casing 11 of entire coal sample pyrolytic reaction device is about 30min, by fully carrying out heat The semicoke formed after depolymerization reaction is reached at semicoke outlet 112, is fallen into semicoke storage tank.

With reference to shown in Fig. 1 and Fig. 4, raw gas refrigerated separation device 20 includes sequentially connected cyclone separator 21, level-one Tar condenser 22, two level tar condenser 23, gas purifier 24 and gas container.Specifically, the one of cyclone separator 21 End is connect with busway, and the other end of cyclone separator 21 is connect with one end of level-one tar condenser 22, in cyclonic separation The lower section of device 21 is connected with fine powder collector 28, is all connected in the lower section of level-one tar condenser 22 and two level tar condenser 23 There is tar well 26, and aspiration pump 27 is additionally provided between gas purifier 24 and two level tar condenser 23.In this hair In a bright example, tar well 26 can be received tar, solvent or tar by washing and elute tar, electrical tar precipitator receipts The modes such as tar collect tar, tar are collected so as to fulfill indirect heat exchange condensation collection mode, in other words by tar well 26 It is set as washing tar well, tar elution collector or electric tar well.

When in use, into the raw gas of raw gas refrigerated separation device 20（Including gas and tar）Temperature be about It 400 ~ 700 DEG C, after cyclone separator 21 removes the fine powder coal particle carried secretly in raw gas, is filled into two-stage tar condensing It puts, that is, passes sequentially through level-one tar condenser 22 and two level tar condenser 23, tar is collected in corresponding tar and receives later In storage 26.It, can be by aspiration pump 27 to entire raw gas due to being connected to aspiration pump 27 before two level tar condenser Refrigerated separation device 20 be evacuated with to entire gas piping with a tiny structure, so that it is guaranteed that the gas of generation can quickly in time into Enter gas circuit pipeline to be handled, and then avoid tar and secondary response coking occurs too much in the process and blocks pipe Road.Gas after firsts and seconds tar condenser enters gas purifier or water scrubber, washs thoroughly to remove again Dust contained therein and tar small molecule are gone, the clean coal gas formed enters gas holder through gas meter（It is not shown）In.

With reference to shown in Fig. 1 and Fig. 5, semicoke cooling collection device 30 includes at least one level-one semicoke being connected to each other and collects Device 31 and two level semicoke collector 32, the entrance of all level-one semicoke collectors 31 at least one level-one semicoke collector 31 Export and connect with the semicoke of coal sample pyrolytic reaction device 10, the outlets of all level-one semicoke collectors 31 with two level semicoke Collector 32 connects.In the example of the present invention, semicoke cooling collection device 30 is set there are two level-one semicoke collector 31, With 112 connection of the semicoke of the end of coal sample pyrolytic reaction device 10 outlet.At the top of each level-one semicoke collector 31 High temp.-resistant valve 33 is equipped at inlet and outlet at bottom, when in use the hot-resistant valve on two level-one semicoke collectors 31 A conjunction is opened on door ground one alternating with each other, i.e., while a level-one semicoke collector 31 is collected be pyrolyzed complete semicoke in time, separately The semicoke being collected into is discharged into two level semicoke collector 32 by one level-one semicoke collector 31.Those skilled in the art can be bright In vain, level-one semicoke collector 31 could be provided as 1,3 or more, those skilled in the art can carry out as needed Correspondingly select.

In another example of the present invention, also need to keep in level-one semicoke collector 31 and two level semicoke collector 32 Inert atmosphere, therefore it is defeated in the inside of all level-one semicoke collector 31 and two level semicoke collector 32 to be equipped with inert gas Entrance 311, Inert gas input port are connect with inert gas purge system.It can be passed through inert gas in time in this way to discharge because opening The air that valve is brought into.The bottom of level-one semicoke collector 31 is connected by high temp.-resistant valve with two level semicoke collector 32, It is cooled down outside the semicoke collector using recirculated water, and level-one semicoke collector and two level semicoke collector are respectively provided with well Sealing performance.

When semicoke cooling collection device 30 works, the semicoke in collection device 30 is cooled down into semicoke, is collected first In level-one semicoke collector 31.And level-one semicoke collector 31 only has collecting function, and corresponding semicoke cooling is not taken to arrange It applies, therefore is collecting after a certain period of time, need to close upper end high temp.-resistant valve 33, and open the high temp.-resistant valve 33 of lower end, make Semicoke is fallen into two level semicoke collector 32.Semicoke in two level semicoke collector 32, a part of semicoke therein, which uses, to be changed Hot method is cooled down, and another part semicoke then directly burn for whole system heat supply by hot be transferred in burner.Such as Semicoke can directly use the mode of circulating water or directly the semicoke after partial thermal decomposition fall into the water rapid to realize Cooling.

Referring to Fig. 6, it illustrates the combined units using low-order coal catalytic degradation according to another embodiment of the present invention Method flow.This method includes the following steps：

（1）The coal sample ground is conveyed into coal sample screening catalytic unit 40 and passes through double-deck screen shale shaker separating device 42 and is carried out Screening obtains the coal sample particle for meeting catalytic pyrolysis reaction；

（2）Coal sample particle by being catalyzed spray equipment 43 is sprayed to the catalyst of certain load capacity, passes through oscillating plate later 433 be conveyed into coal-storage pot stand the predetermined time it is spare；

（3）Coal sample after standing is conveyed into coal sample pyrolytic reaction device 10 to carry out pyrolytic reaction and generate gas, tar And particle dust, while coal sample forms semicoke, gas, tar and particle dust enter raw gas refrigerated separation device 20 In, semicoke is pushed into semicoke by spiral pushing device 13 and cools down in collection device 30；

（4）Gas, tar and particle dust are detached, and gas after raw gas refrigerated separation device 20 is entered Enter level-one tar condenser 22 with tar and two level tar condenser 23 carries out condensation and forms burnt oil and gas, coal gas passes through gas Body clarifier 24 is purified and is entered in gas holder, and particle dust is collected by fine powder collector 28；

（5）Semicoke is collected by level-one semicoke collector 31 all at least one level-one semicoke collector 31, later It falls into two level semicoke collector 32.

Specifically, realize that the method for low-order coal mild catalytic depolymerization is as follows：

（1）The fine coal ground is passed through coal sample by conveying device to sieve in catalytic unit 40, it is suitable to obtain by screening In the coal sample particle of catalytic pyrolysis reaction, which rolls on the second vibration screen 422 moves ahead, and in second vibration The end of sieve 422 is exported by the second coal sample to be entered in catalysis spray equipment 43, sprays certain load capacity by spray thrower 432 Catalyst, later into stand for standby use in coal-storage pot.

（2）Coal sample after by sprinkling catalyst and standing is fallen into coal sample warehouse, and pass through conveying device and enter coal sample In the coal scuttle 15 of pyrolytic reaction device 10, and inert gas is passed through with by coal scuttle by inert blowing gas sweeping device in coal scuttle 15 Air discharge in 15, the coal sample is delivered to pyrolysis reactor furnace by star-like feeder 17 according to given pace later（That is inner casing 11）In.After the coal sample enters the inner cavity of inner casing 11, under the rotation forces effect of the screw rod of spiral pushing device 13, constantly It overturns and slowly moves forward.Meanwhile the heat transfer heating of the annular chamber between by inner casing 11 and shell 12, the coal sample particle are continuous Dehydration and catalytic degradation reaction occur for heating.Atmosphere can be passed through in furnace body as needed, improves the catalysis solution of coal sample particle Poly- response characteristic.The light gas such as the vapor, the methane and carbon dioxide that are generated via catalytic pyrolysis reaction, tar and few The particle dust of amount is exported by multiple export channels 111 on reacting furnace-e/or top to raw gas refrigerated separation device 20 In.And the semicoke that coal sample is generated by catalytic pyrolysis reaction is pushed into reacting furnace end then under the impetus of screw rod At semicoke outlet 112, and fall into semicoke cooling collection device 30；

（3）In step（2）In the light gas such as obtained methane and carbon dioxide and hot tar gas enter rotation In wind separator 21, to detach the fine particle dust of entrained with during catalytic pyrolysis reaction.The obtained fine powder of separation Grain dust is collected through cooling and is utilized into fine powder collector 28 as semicoke.In the course of work of raw gas refrigerated separation device 20 In, cyclone separator 21 need to maintain certain temperature, to ensure that unlikely a large amount of tar cool down herein.It is detached through cyclone separator 21 Rear gaseous product continue successively by level-one tar condenser 22 and two level tar condenser 23 carries out respectively level-one condensation with B-grade condensation, and detach the burnt oil and gas of acquisition.Aspiration pump 27 is connected in the end of two level tar condenser 23, pumping can be passed through Air pump is evacuated to give entire gas piping（I.e. multiple flow-guiding channels 111 and busway 114）With a tiny structure, the life to ensure Into gas can quickly be handled in time into gas circuit pipeline, it is excessive secondary so as to which tar be avoided to occur in the process React coking and blocking pipeline.The coal gas obtained after 23 separating tar of two level tar condenser is through water scrubber or gas Clarifier is purified and is entered in gas holder again；

（4）In step（2）In obtained semicoke fallen into two level semicoke collector 32 by level-one semicoke collector 31. Part semicoke in two level semicoke collector 32 is cooled to room temperature, and is sold as clean fuel semicoke product.And another part Semicoke is by online hot transfer device, and by the part, semicoke is transferred in combustion furnace, individually or together with the fines under sieve It burns for entire coal sample pyrolytic reaction device heat supply.The side of heat supply outside lower fines or coal-char combustion is sieved by using part in this way Formula realizes the mild catalytic depolymerization of low-order coal.

In the example of the present invention, in step（1）In, before low-order coal enters coal sample screening catalytic unit 10 also The step of including low-order coal is crushed, when this crushes low-order coal can according to the property and response characteristic of coal sample, To determine the appropriate particle size of the pulverized coal particle of low order coal, and suitable broken coal equipment is selected to be crushed.

In another example of the present invention, in step（1）Used in catalyst be a kind of water type low-order coal catalytic degradation Increase oily catalyst, containing one or more ingredients such as Ni, Fe, Al, Zn, and under promoter effect catalyst soluble in aqueous solution In, thus can directly be sprayed without blocking nozzle.And by adding such new catalyst, play modulation low order Tar quality obtained by pyrolysis of coal, while increase the effect of tar yield, it is possible thereby to obtain the tar in coal sample to the maximum extent Ingredient, simultaneously because the disturbance that raw material coal particle is subject to is lacked, therefore fine particle content is low in gained tar and tar quality is high. Here, the catalyst that the present invention adds can be recorded catalyst in Chinese patent CN103831113, therefore herein No longer it is described in detail.

In the example of the present invention, in step（2）In, to further include before coal sample catalytic pyrolysis reaction to coal sample into The dry step of row.When the moisture in the coal sample after standing is relatively low, dry and pyrolysis can simultaneously in pyrolysis oven into Row.And coal sample moisture after standing is higher, then can separately set a set of drying device, be gone forward side by side with removing the moisture in the coal sample Row preheating.The device identical with the structure of the coal sample pyrolytic reaction device 10 can be used in the drying device, can also use air blast The modes such as drying, roller drying, vapour seasoning are dried.In another example of the present invention, in step（2）Middle coal sample carries out During catalytic pyrolysis reaction, the atmosphere that can be passed through is the mixed of vapor, hydrogen, carbon dioxide, nitrogen, vapor and carbon dioxide gas Gas, nitrogen and the mixed gas or vapor of vapor and the mixed gas of hydrogen are closed, to improve the catalysis solution of coal sample particle Poly- response characteristic.And the less introducing adscititious gases in this way into reacting furnace-e/or, additionally it is possible to obtain the higher raw gas of calorific value.

In the present invention, catalyst addition manner has larger impact for catalytic pyrolysis reaction.On the one hand, it is because making A large amount of coal is handled with middle needs, and if the catalyst added is uneven, then catalytic effect will be by shadow It rings.Such as have the oil productivity height of more accessible part coal with catalyst, and the part coal for not reaching catalyst then may nothing Any catalytic effect.On the other hand, it can ensure that catalyst can more uniformly, preferably connect with coal by spraying catalyst It touches；During the change of reaction mechanism is embodied in pyrolysis, the addition of catalyst can make some chemical bonds in pyrolysis of coal The disconnection of selectivity, and in no addition catalyst, this part chemical bond may would not disconnect, so passing through catalyst Uniformly addition improves pyrolysis of coal conversion ratio, and then improve tar yield.

In the example of the present invention, in step（3）In to light gas, hot tar gas and solid fines particle Collection can be respectively collected in different raw gas refrigerated separation devices 20, with obtain the differential responses stage reaction produce Object.It is thin to light gas, hot tar gas and solid in raw gas refrigerated separation device 20 in another example of the present invention Powder particles dust, which carries out separation method, to be had：First method is directly uses water-cooling method, i.e., by raw gas（I.e. containing gas, The mixture of tar and particle dust）Sprinkling is passed through to carry out cooling removing tar and pulverized coal particle in misty water；Second Kind method is light using water cooling, liquid phase again later first to remove most of solid fines particle in raw gas using cyclone separator The modes such as the cooling of matter tar, cold ammonia cooling or electrically trapped tar oil carry out gas and tar separation.In the also example of the present invention In, the mode that semicoke falls into the water can be realized that semicoke is cold by two level semicoke collector by recirculated water cooling mode or directly But.

Although some embodiments of this present general inventive concept have been shown and have illustrated, those of ordinary skill in the art will manage Solution in the case of without departing substantially from the principle of this present general inventive concept and spirit, can make a change these embodiments, of the invention Range is limited with claim and their equivalent.

Claims

1. a kind of combined unit of low-order coal catalytic degradation, the combined unit includes coal sample pyrolytic reaction device, rough coal is gas-cooled But separator and semicoke cooling collection device, the raw gas refrigerated separation device and semicoke cooling collection device with it is described Coal sample pyrolytic reaction device connects, which is characterized in that

The combined unit further includes coal sample screening catalytic unit, the coal sample screening catalytic unit and the coal sample pyrolytic reaction The entrance connection of device, and coal sample screening catalytic unit includes housing and the double-deck screen shale shaker being arranged in the housing point Device, the double-deck screen shale shaker separating device pass through the double-deck coal sample sieved the low-order coal coal sample acquisition and meet catalytic pyrolysis reaction Particle,

The double-deck screen shale shaker separating device includes the first vibration screen and what is be arranged below first vibration screen second shake Dynamic sieve, first vibration screen and the second vibration screen are set along the longitudinally of the housing, and first vibration The mesh size of sieve is more than the mesh size of the second vibration screen, causes coal sample by means of the first vibrating screen and the second vibrating screen Under the vibration force of vibrator and the synergy from gravity of material, move in a straight line forward to great-jump-forward.

2. the combined unit of low-order coal catalytic degradation according to claim 1, which is characterized in that

When in use, low-order coal coal sample passes sequentially through the first and second vibration screen vibrosieves, and is vibrated by described second The coal sample that screen cloth vibrating screen is separately won is the coal sample particle for meeting catalytic pyrolysis reaction,

The outlet of the first coal sample and the outlet of the second coal sample are provided on coal sample screening catalytic unit, passes through first coal sample Export the coal sample particle on the first vibration screen collected in the end of coal sample screening catalytic unit and fall within the bottom plate of housing On coal sample particle remove coal sample screening catalytic unit, will be in second vibration screen by second coal sample outlet End collect and coal sample particle on the second vibration screen remove the coal sample screening catalytic unit.

3. the combined unit of low-order coal catalytic degradation according to claim 2, which is characterized in that

Coal sample screening catalytic unit further includes catalysis spray equipment, and the catalysis spray equipment includes shell, at least one Spray thrower, oscillating plate and catalyst storage tank, all spray throwers and oscillating plate are arranged at institute at least one spray thrower State in shell, all spray throwers are arranged at the top of the oscillating plate, and all spray throwers with it is described Catalyst storage tank connects,

The catalysis spray equipment is arranged at intervals with the double-deck screen shale shaker separating device and positioned at the double-deck screen shale shaker separating device End, the catalyst solution amount of spray and the mass ratio of coal sample are arranged in the range of 0.1~10wt%, the spray Catalyst increases oily catalyst for water type low-order coal catalytic degradation, and when in use, the catalyst is equably sprayed in the vibration In screened good coal sample on plate.

4. the combined unit of low-order coal catalytic degradation according to claim 3, which is characterized in that

Coal sample after the catalyst sprays and stands is transported in the entrance of the coal sample pyrolytic reaction device, the coal Sample pyrolytic reaction device includes inner casing, shell and spiral pushing device, and inside the shell, the screw propulsion fills for the inner casing setting It puts and is arranged in the inner cavity of the inner casing；

It is additionally provided with to export the gas and coke that the coal sample in the inner casing is passed through pyrolytic reaction and obtained at the top of the inner casing Multiple export channels of oil, inner cavity of the multiple one end for exporting channel with the inner casing connect, and the multiple export is logical The other end in road is connected via the busway of the longitudinally arrangement along the inner casing with the raw gas refrigerated separation device, Each export channel in the multiple export channel is described along the direction setting of the longitudinally perpendicular to the inner casing One another around annular chamber is formed between inner casing and shell, the coal sample that the annular chamber is used for the interior intracavitary to the inner casing provides heat Amount.

5. the combined unit of low-order coal catalytic degradation according to claim 4, which is characterized in that

The first end of the spiral pushing device is fixedly connected with entrance one end far from the coal sample pyrolytic reaction device, described The longitudinally of the spiral pushing device second end opposite with first end along the inner casing extend to the shell and with it is described outer Shell magnetic seal；

Circulating water cooling device is arranged in the second end of spiral pushing device, and the second end of the spiral pushing device passes through Gear is connect with motor, is additionally provided on one end close to the circulating water cooling device of the coal sample pyrolytic reaction device At least one coal scuttle is correspondingly set on the other end far from the circulating water cooling device of the coal sample pyrolytic reaction device It is equipped with semicoke outlet, all coal scuttles at least one coal scuttle are the entrance of the coal sample pyrolytic reaction device, institute The entrance that semicoke outlet is stated with semicoke cooling collection device is connect；

Star-like feeder is provided on one end of the inner cavity of the connection inner casing of the coal scuttle, and anti-in coal sample pyrolysis Answer the adjusting supporting rack that the angle for adjusting the coal sample pyrolytic reaction device is provided with below device, the screw propulsion Device is with center bolt axial screw or Shaftless spiral blade, the screw propulsion with center bolt axial screw Device is also associated with heating unit.

6. the combined unit of low-order coal catalytic degradation according to claim 4, which is characterized in that

It is cold that the raw gas refrigerated separation device includes sequentially connected cyclone separator, level-one tar condenser, two level tar Condenser, gas purifier and gas container, one end of the cyclone separator are connect with the busway, and the whirlwind point The other end from device is connect with one end of level-one tar condenser, under the level-one tar condenser and two level tar condenser Side is respectively connected with tar well, and aspiration pump is additionally provided between the gas purifier and the two level tar condenser；

Be connected with fine powder collector below the cyclone separator, and the tar well be washing tar well, Tar elutes collector or electrically trapped tar oil collector.

7. the combined unit of low-order coal catalytic degradation according to claim 5 or 6, which is characterized in that

The semicoke cooling collection device includes at least one level-one semicoke collector being connected to each other and two level semicoke collector, The entrance of all level-one semicoke collectors is filled with the coal sample pyrolytic reaction at least one level-one semicoke collector The semicoke outlet connection put, the outlet of all level-one semicoke collectors are connect with the two level semicoke collector,

High temp.-resistant valve is both provided in the entrance and exit of the level-one semicoke collector, is received in all level-one semicokes Inert gas input port, the Inert gas input port and inert gas purge are both provided on storage and two level half-angle collector System connects.

8. a kind of method of the combined unit of low-order coal catalytic degradation using described in any one of claim 1-7, the side Method includes the following steps：

(1) coal sample ground is conveyed into the coal sample screening catalytic unit and passes through the double-deck screen shale shaker separating device and carried out Screening obtains the coal sample particle for meeting catalytic pyrolysis reaction；

(2) the coal sample particle is sprayed to the catalyst of certain load capacity by being catalyzed spray equipment, it is defeated by oscillating plate later It is spare to be sent into the standing predetermined time in coal-storage pot；

(3) coal sample after standing is conveyed into coal sample pyrolytic reaction device to carry out pyrolytic reaction and generate gas, tar and thin Grain dust, while coal sample forms semicoke, the gas, tar and particle dust enter the raw gas refrigerated separation device In, the semicoke is pushed into semicoke by spiral pushing device and cools down in collection device；

(4) gas, tar and particle dust are detached, and the gas after raw gas refrigerated separation device is entered Body and tar enter level-one tar condenser and two level tar condenser carries out condensation and forms burnt oil and gas, and the coal gas passes through Gas purifier is purified and is entered in gas holder, and the particle dust is collected by fine powder collector；

(5) semicoke is collected by level-one semicoke collector all at least one level-one semicoke collector, falls into two level later In semicoke collector.

9. according to the method described in claim 8, it is characterized in that,

In step (4), gas, tar and fine grained powder will be contained to being separated into for the gas, tar and particle dust The mixture of dirt is passed through sprinkling to carry out cooling removing tar and pulverized coal particle in misty water；

Or most of solid particle in the mixture is first removed by cyclone separator, it is light by water cooling, liquid phase later The cooling of matter tar, cold ammonia cooling or electrically trapped tar oil mode carry out gas and tar separation.

10. according to the method described in claim 8, it is characterized in that,

The two level semicoke collector realizes half by recirculated water cooling mode or cold quenching, directly by the mode that semicoke falls into the water Coke cooling.