CN207243818U - The system that a kind of low-order coal prepares semicoke - Google Patents

The system that a kind of low-order coal prepares semicoke Download PDF

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CN207243818U
CN207243818U CN201721219596.XU CN201721219596U CN207243818U CN 207243818 U CN207243818 U CN 207243818U CN 201721219596 U CN201721219596 U CN 201721219596U CN 207243818 U CN207243818 U CN 207243818U
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coal
pyrolysis
outlet
entrance
air
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祁娟
邓鑫
赵飞翔
高建
刘涛
吴道洪
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Shenwu Technology Group Corp Co Ltd
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Abstract

The system that a kind of low-order coal prepares semicoke is the utility model is related to, includes air-classifier, kneading device, tar oxidation unit, screening plant, molding machine, pyrolysis installation, coal gas cooling device and waste-heat recovery device.The system of the utility model can solve the problems, such as that fine coal balling ratio is low, type ball intensity is low, gas explosion is serious, hemisphere is more, and so as to improve the utilization rate of powder, while pyrolysis oil gas obtained by the method and char yeild height, quality are good.

Description

The system that a kind of low-order coal prepares semicoke
Technical field
Coal resources optimization is the utility model is related to, and be more particularly related to that a kind of low-order coal prepares semicoke is System.
Background technology
Coal is the important component of world's primary energy, accounts for the first place of world energy sources.China is coal the biggest in the world Charcoal production and consumption state, coal production account for the 37% of world's coal total output, ratio of the coal in China's primary energy structure About 70%.Coal resources in China A wide selection of colours and designs, wherein low order coal reserves are maximum.Most domestic bulk low-order coal passes through pyrolysis Semicoke is made and is widely used in mineral hot furnace, ferroalloy, yellow phosphorus, calcium carbide smelting and coal gas and various kiln burnings, but largely Powdery low-order coal due to gas permeability it is bad, can not be successfully and be pyrolyzed.Meanwhile from the point of view of coal production, with coal mining Scale and mechanization degree raising, the yield of lump coal is more and more lower, and price rises steadily, and is largely difficult to for fine coal It is effectively utilized, causes the wasting of resources.In addition, during lump coal sifts out, gangue tends to be enriched with to fine coal so that Fine coal is showing as the problems such as gas explosion is serious, ratio of briquetting is low, type ball intensity is small during subsequent forming.
Jet coal and sticky bituminous coal are crushed in the prior art, are mixed, is pressed into the pelletizing of certain size, then soon Speed carbonization, then cool down to obtain semicoke via cooling belt feeder.The technology is by being incorporated the caking coal of 20-80%, caking coal supplying Amount is big, this make it that industrialization is limited be subject to sticky coal district, meanwhile, the raw coal size requirement of the technology is less than 1mm, it is necessary to volume Outer introducing breaker, while high-temperature semi-coke carries a large amount of latent heat, it uses cooling belt cooling, causes energy waste.
Utility model content
The utility model is in view of the above-mentioned problems, purpose is to provide a kind of system for preparing semicoke using low-order coal.This is System can solve the problems, such as that coal powder formation rate is low, gas explosion is serious, type ball intensity is low, so as to improve in follow-up pyrolytic process Oil gas, the quality of semicoke and yield, and by the way that the waste heat produced in pyrolytic process to recycle, can significantly be lowered Energy consumption;Fine coal, lump coal are separately handled at the same time, improve the utilization rate of raw material.
To reach above-mentioned purpose, the utility model adopts the following technical solution:
According to the utility model, there is provided the system that a kind of low-order coal prepares semicoke, comprising:
Screening plant, the screening plant be used for by low-order coal carry out block powder separation, the screening plant include low-order coal entrance, Lump coal outlet and minus sieve coal export on sieve;
Air-classifier, the air-classifier are used to fine coal progress pneumatic separation obtaining powder cleaned coal, pneumatic separation The air-flow used is superheated steam;Air-classifier includes superheated steam entrance, minus sieve coal entrance, offgas outlet, spoil Outlet and the outlet of powder cleaned coal;Minus sieve coal entrance is connected with the minus sieve coal export of screening plant;
Kneading device, the kneading device are used to be mixed powder cleaned coal;Kneading device includes powder cleaned coal entrance, binding agent Entrance and mixed material outlet, powder cleaned coal entrance are connected with the powder cleaned coal outlet of air-classifier;
Tar oxidation unit, the tar oxidation unit are used to tar progress oxidation processes obtaining binding agent;Tar aoxidizes Device includes tar entrance and binding agent exports, and binding agent outlet is connected with the binding agent entrance of kneading device.
Screening plant, the screening plant are used to low-order coal carrying out block powder separation, and screening plant includes low-order coal entrance, sieve Upper lump coal outlet and minus sieve coal export;Minus sieve coal export is connected with the minus sieve coal entrance of air-classifier;
Molding machine, the molding machine are used for the shaping of pelletizing;Molding machine includes mixed material entrance and shaping pelletizing Outlet, mixed material entrance are connected with the mixed material outlet of kneading device;
Pyrolysis installation, the pyrolysis installation are used to lump coal and shaping pelletizing being pyrolyzed;Pyrolysis installation includes and treats pyrogen Expect entrance, pyrolysis char outlet and pyrolysis gas exit;Material inlet to be pyrolyzed is exported with lump coal on the sieve of screening plant respectively It is connected with the shaping pelletizing outlet of molding machine;
Coal gas cooling device, the coal gas cooling device include pyrolysis gas entry, tar outlet and gas exit, pyrolyzing coal Gas entrance is connected with the pyrolysis gas exit of pyrolysis installation, and tar outlet is connected with the tar entrance of tar oxidation unit.
Further, system also includes:
Waste-heat recovery device, the waste-heat recovery device include pyrolysis char entrance, the outlet of cooling semicoke and superheated steam and go out Mouthful, superheated steam outlet is connected with the superheated steam entrance of air-classifier, for by the superheated steam of waste-heat recovery device The air-flow used as air-classifier pneumatic separation.By the use of absorb pyrolysis char dive thermogenetic superheated steam be used as sorting Air-flow, can both exclude spoil in fine coal, improve fine coal balling ratio, increase follow-up pyrolysis char product quality;Overheat steaming at the same time Vapour can drive the gases such as the oxygen for being attached to fine coal, nitrogen, carbon dioxide, so as to avoid gas during fine coal pressure ball molding Quick-fried problem, further increases balling ratio and type ball intensity, in addition, avoiding gas explosion from decreasing the wear-out failure to former.
Further, the pyrolysis char entrance of waste-heat recovery device is connected with the pyrolysis char outlet of pyrolysis installation;Cooling Semicoke outlet is used for output products.
In addition, preparing the method for semicoke using system as described above, comprise the steps of:
1) fine coal is delivered to air-classifier and carries out pneumatic separation, obtain powder cleaned coal;
2) tar is subjected to oxidation processes by tar oxidation unit and obtains binding agent;
3) powder cleaned coal and binding agent are subjected to mixed processing in kneading device, obtain mixed material;
4) mixed material for obtaining step 3) carries out pyrolysis processing in pyrolysis installation, obtains pulverized coal pyrolysis semicoke and powder Pyrolysis of coal coal gas.
Wherein, fine coal is minus sieve coal in step 1), and minus sieve coal is by the way that low-order coal is sieved in screening plant What classification obtained;Low-order coal is divided into the upper lump coal of sieve and minus sieve coal after crossing sieve classification;
Lump coal obtains lump coal pyrolysis char and lump coal pyrolysis coal gas, lump coal pyrolyzing coal after pyrolysis installation is pyrolyzed on sieve Gas and/or pulverized coal pyrolysis coal gas obtain the tar in coal gas and step 2) after carrying out cooling treatment.
Further, pulverized coal pyrolysis semicoke and/or lump coal pyrolysis char carry out waste heat recovery by waste-heat recovery device, obtain To cooling semicoke and superheated steam;Superheated steam is delivered to the air-flow that air-classifier is used as pneumatic separation.
Further, the temperature control of superheated steam is at 100-200 DEG C.
Further, after shaping pelletizing is made in mixed material in molding machine in step 3), it is re-fed into the heat of step 4) It is pyrolyzed in solution device.
Further, the briquetting pressure that shaping pelletizing is made in molding machine is 14-20Mpa.
Further, the pyrolysis temperature in pyrolysis installation is 600-900 DEG C, pyrolysis time 1-2.5h.
Further, the air velocity for sorting air-flow is 4-11m/s.
Further, powder cleaned coal and binding agent carry out kneading processing according to 1: 0.08-0.2 mass ratio in step 3), mix The conjunction time is 6-10min.
Further, the oxidation temperature of step 2) is 250-350 DEG C, oxidization time 1-3h.
Further, the oxidant of the oxidation processes of step 2) is air, air mass flow 0.5-10L/h.
The beneficial effects of the utility model are:
The utility model uses air-classifier, by the use of absorb pyrolysis char dive thermogenetic superheated steam be used as sorting Air-flow, can both exclude spoil in fine coal, improve fine coal balling ratio, increase follow-up pyrolysis char product quality;Overheat steaming at the same time Vapour can drive the gases such as the oxygen for being attached to fine coal, nitrogen, carbon dioxide, so as to avoid gas during fine coal pressure ball molding Quick-fried problem, further increases balling ratio and type ball intensity, in addition, avoiding gas explosion from decreasing the wear-out failure to former.
The system of the utility model can solve that fine coal balling ratio is low, type ball intensity is low, gas explosion is serious, asking more than hemisphere Topic, so as to improve the utilization rate of powder, while pyrolysis oil gas obtained by the method and char yeild height, quality are good.
The utility model produced steam by using the high temperature latent heat of pyrolysis char and is used for fine coal pneumatic separation, excluded powder Spoil, the troilite being enriched with coal, reduce powder pit ash, sulphur powder, improve fine coal caloric value, increase fine coal balling ratio, and then Improve the quality of semicoke after being pyrolyzed and reduce environmental pollution.
Superheated steam can both be used as separating medium to remove gangue, at the same its can exclude to be attached to the oxygen of fine coal, The gases such as nitrogen, carbon dioxide, reduce gas explosion, further increase balling ratio, while reduce the infringement to former, extend it Service life.
The utility model uses the tar produced in pyrolytic process to eliminate outer adding additives or caking coal for binding agent Supplying, reduces requirement of the caking coal to selecting factory to build location, eliminates extra binding agent cost.
Brief description of the drawings
Fig. 1 is the schematic diagram according to the system that semicoke is prepared using low-order coal of the embodiment of the utility model;
Fig. 2 is the flow chart for the method that semicoke is prepared according to the system of the embodiment of the utility model.
Reference numeral
1 coal bunker, 2 screening plants, 3 air-classifiers, 4 kneading devices, 5 molding machines, 6 pyrolysis installations, 7 waste heat recoveries Device, 8 coal gas cooling devices, 9 tar oxidation units.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with the accompanying drawings and implement Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining this Utility model, is not used to limit the utility model.
As shown in Figure 1, there is provided the system that a kind of low-order coal prepares semicoke, includes air-classifier 3, kneading device 4, Jiao Oily oxidation unit 9, screening plant 2, molding machine 5, pyrolysis installation 6, coal gas cooling device 8 and waste-heat recovery device 7.
Screening plant 2 is used to low-order coal carrying out block powder separation, and screening plant 2 goes out comprising lump coal on low-order coal entrance, sieve Mouth and minus sieve coal export;Minus sieve coal export is connected with the minus sieve coal entrance of air-classifier 3.Especially, screening dress The sieve aperture for putting 2 does not do specifically limited, and those skilled in the art can make choice according to actual needs, screen-aperture with 5mm with Under be advisable.
Air-classifier 3 is used to fine coal progress pneumatic separation obtaining powder cleaned coal, and the air-flow that pneumatic separation uses was Hot steam;Air-classifier 3 includes superheated steam entrance, minus sieve coal entrance, offgas outlet, spoil outlet and powder cleaned coal and goes out Mouthful.
Kneading device 4 is used to be mixed powder cleaned coal;Kneading device 4 includes powder cleaned coal entrance, binding agent entrance and mixes Material outlet is closed, powder cleaned coal entrance is connected with the powder cleaned coal outlet of air-classifier 3.
Tar oxidation unit 9 is used to tar progress oxidation processes obtaining binding agent;Tar oxidation unit 9 enters comprising tar Mouth and binding agent outlet, binding agent outlet are connected with the binding agent entrance of kneading device 4.
Molding machine 5 is used for the shaping of pelletizing;Molding machine 5 includes mixed material entrance and the outlet of shaping pelletizing, mixing Material inlet is connected with the mixed material outlet of kneading device 4.
Pyrolysis installation 6 is used to lump coal and shaping pelletizing being pyrolyzed;Pyrolysis installation 6 includes material inlet to be pyrolyzed, heat Solve semicoke outlet and pyrolysis gas exit;Material inlet to be pyrolyzed is filled with lump coal outlet and shaping on the sieve of screening plant 2 respectively Put 5 shaping pelletizing outlet be connected.
Coal gas cooling device 8 includes pyrolysis gas entry, tar outlet and gas exit, and pyrolysis gas entry is filled with pyrolysis Put 6 pyrolysis gas exit to be connected, tar outlet is connected with the tar entrance of tar oxidation unit 9.
Waste-heat recovery device 7 includes pyrolysis char entrance, the outlet of cooling semicoke and superheated steam outlet, superheated steam outlet It is connected with the superheated steam entrance of air-classifier 3, for the superheated steam of waste-heat recovery device 7 to be filled as pneumatic separation Put the air-flow that 3 pneumatic separations use.
The pyrolysis char entrance of waste-heat recovery device 7 is connected with the pyrolysis char outlet of pyrolysis installation 6;Cool down semicoke outlet For output products.
Embodiment 1
As shown in Fig. 2, preparing the method for semicoke using system as described above, comprise the steps of:
Low-order coal is fed through from coal bunker 1 to low-order coal entrance through bucket elevator into carrying out screening in screening plant 2 Level, 2 aperture of screening plant is 5mm, is divided into the upper lump coal of sieve and minus sieve coal;Lump coal is under the upper lump coal outlet discharge of sieve, sieve on sieve Fine coal is discharged from minus sieve coal export;
Fine coal is delivered to air-classifier 3 by minus sieve coal entrance and carries out pneumatic separation, sorts the air-flow of air-flow Speed is 8m/s, obtains powder cleaned coal;
Powder cleaned coal obtained above and binding agent are carried out carrying out kneading in kneading device 4 according to 1: 0.15 mass ratio Processing, incorporation time 8min, obtains mixed material;Mixed material exports discharge from the mixed material of kneading device 4;Will mixing Material is delivered in molding machine 5 by mixed material entrance and carries out forming processes, obtains shaping pelletizing, and briquetting pressure is 18Mpa;It is molded pelletizing to discharge from the outlet of shaping pelletizing, forming unit balling ratio is 87.17%;
Shaping pelletizing is subjected to pyrolysis processing, pyrolysis temperature 700 by being molded pelletizing entrance in revolving bed pyrolysis installation 6 DEG C, pyrolysis time 1h, obtains pulverized coal pyrolysis semicoke and pulverized coal pyrolysis coal gas;Pulverized coal pyrolysis semicoke is exported from pyrolysis char and discharged, Pulverized coal pyrolysis coal gas is discharged from pyrolysis gas exit;
The upper lump coal of sieve is delivered to the upper lump coal entrance of sieve through belt and carries out pyrolysis processing into revolving bed pyrolysis installation 6, heat It is 700 DEG C, pyrolysis time 1h to solve temperature, obtains lump coal pyrolysis char and lump coal pyrolysis coal gas;Lump coal pyrolysis char is from pyrolysis half Jiao outlet discharge, lump coal are pyrolyzed coal gas from pyrolysis gas exit discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis coal gas by be pyrolyzed gas entry be delivered to coal gas cooling device 8 into Row cooling, obtains burnt oil and gas;Tar is discharged from tar outlet, and coal gas is discharged from gas exit;
Tar is delivered to tar oxidation unit 9 by tar entrance and carries out oxidation processes, oxidation temperature 250 DEG C, oxidization time 1.5h, oxidant is air, air mass flow 0.5L/h, obtains the binding agent of powder cleaned coal shaping, and from Binding agent outlet discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis semicoke by pyrolysis char entrance be delivered to waste-heat recovery device 7 into Row waste heat recovery, obtains cooling semicoke and superheated steam;Product semicoke after cooling is steamed by cooling down semicoke outlet discharge, overheat Vapour is exported by the superheated steam and discharged, and the temperature control of superheated steam is at 170 DEG C.
Superheated steam is delivered to the air-flow that air-classifier 3 is used as pneumatic separation.
Semicoke after cooling is subjected to ionization meter on pressure testing machine, its compression strength is 546N;After cooling half Burnt volatile matter content is 7.36%, content of ashes 15.75%.
Embodiment 2
As shown in Fig. 2, preparing the method for semicoke using system as described above, comprise the steps of:
Low-order coal is fed through from coal bunker 1 to low-order coal entrance through bucket elevator into carrying out screening in screening plant 2 Level, 2 aperture of screening plant is 5mm, is divided into the upper lump coal of sieve and minus sieve coal;Lump coal is under the upper lump coal outlet discharge of sieve, sieve on sieve Fine coal is discharged from minus sieve coal export;
Fine coal is delivered to air-classifier 3 by minus sieve coal entrance and carries out pneumatic separation, sorts the air-flow of air-flow Speed is 4m/s, obtains powder cleaned coal;
Powder cleaned coal obtained above and binding agent are carried out carrying out kneading in kneading device 4 according to 1: 0.08 mass ratio Processing, incorporation time 6min, obtains mixed material;Mixed material exports discharge from the mixed material of kneading device 4;Will mixing Material is delivered in molding machine 5 by mixed material entrance and carries out forming processes, obtains shaping pelletizing, and briquetting pressure is 14Mpa;It is molded pelletizing to discharge from the outlet of shaping pelletizing, forming unit balling ratio is 86.23%;
Shaping pelletizing is subjected to pyrolysis processing, pyrolysis temperature 600 by being molded pelletizing entrance in revolving bed pyrolysis installation 6 DEG C, pyrolysis time 1.5h, obtains pulverized coal pyrolysis semicoke and pulverized coal pyrolysis coal gas;Pulverized coal pyrolysis semicoke is exported from pyrolysis char and arranged Go out, pulverized coal pyrolysis coal gas is discharged from pyrolysis gas exit;
The upper lump coal of sieve is delivered to the upper lump coal entrance of sieve through belt and carries out pyrolysis processing into revolving bed pyrolysis installation 6, heat It is 600 DEG C, pyrolysis time 1.5h to solve temperature, obtains lump coal pyrolysis char and lump coal pyrolysis coal gas;Lump coal pyrolysis char is from pyrolysis Semicoke outlet discharge, lump coal are pyrolyzed coal gas from pyrolysis gas exit discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis coal gas by be pyrolyzed gas entry be delivered to coal gas cooling device 8 into Row cooling, obtains burnt oil and gas;Tar is discharged from tar outlet, and coal gas is discharged from gas exit;
Tar is delivered to tar oxidation unit 9 by tar entrance and carries out oxidation processes, oxidation temperature 300 DEG C, oxidization time 1h, oxidant is air, air mass flow 3L/h, obtains the binding agent of powder cleaned coal shaping, and from bonding Agent outlet discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis semicoke by pyrolysis char entrance be delivered to waste-heat recovery device 7 into Row waste heat recovery, obtains cooling semicoke and superheated steam;Product semicoke after cooling is steamed by cooling down semicoke outlet discharge, overheat Vapour is exported by the superheated steam and discharged, and the temperature control of superheated steam is at 100 DEG C.
Superheated steam is delivered to the air-flow that air-classifier 3 is used as pneumatic separation.
Semicoke after cooling is subjected to ionization meter on pressure testing machine, its compression strength is 423N;After cooling half Burnt volatile matter content is 11.30%, content of ashes 19.65%.
Embodiment 3
As shown in Fig. 2, preparing the method for semicoke using system as described above, comprise the steps of:
Low-order coal is fed through from coal bunker 1 to low-order coal entrance through bucket elevator into carrying out screening in screening plant 2 Level, 2 aperture of screening plant is 5mm, is divided into the upper lump coal of sieve and minus sieve coal;Lump coal is under the upper lump coal outlet discharge of sieve, sieve on sieve Fine coal is discharged from minus sieve coal export;
Fine coal is delivered to air-classifier 3 by minus sieve coal entrance and carries out pneumatic separation, sorts the air-flow of air-flow Speed is 11m/s, obtains powder cleaned coal;
Powder cleaned coal obtained above and binding agent are carried out carrying out kneading in kneading device 4 according to 1: 0.2 mass ratio Processing, incorporation time 10min, obtains mixed material;Mixed material exports discharge from the mixed material of kneading device 4;Will be mixed Compound material is delivered in molding machine 5 by mixed material entrance and carries out forming processes, obtains shaping pelletizing, and briquetting pressure is 20Mpa;It is molded pelletizing to discharge from the outlet of shaping pelletizing, forming unit balling ratio is 86.23%;
Shaping pelletizing is subjected to pyrolysis processing, pyrolysis temperature 900 by being molded pelletizing entrance in revolving bed pyrolysis installation 6 DEG C, pyrolysis time 2.5h, obtains pulverized coal pyrolysis semicoke and pulverized coal pyrolysis coal gas;Pulverized coal pyrolysis semicoke is exported from pyrolysis char and arranged Go out, pulverized coal pyrolysis coal gas is discharged from pyrolysis gas exit;
The upper lump coal of sieve is delivered to the upper lump coal entrance of sieve through belt and carries out pyrolysis processing into revolving bed pyrolysis installation 6, heat It is 900 DEG C, pyrolysis time 2.5h to solve temperature, obtains lump coal pyrolysis char and lump coal pyrolysis coal gas;Lump coal pyrolysis char is from pyrolysis Semicoke outlet discharge, lump coal are pyrolyzed coal gas from pyrolysis gas exit discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis coal gas by be pyrolyzed gas entry be delivered to coal gas cooling device 8 into Row cooling, obtains burnt oil and gas;Tar is discharged from tar outlet, and coal gas is discharged from gas exit;
Tar is delivered to tar oxidation unit 9 by tar entrance and carries out oxidation processes, oxidation temperature 350 DEG C, oxidization time 3h, oxidant is air, air mass flow 10L/h, obtains the binding agent of powder cleaned coal shaping, and from viscous Tie agent outlet discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis semicoke by pyrolysis char entrance be delivered to waste-heat recovery device 7 into Row waste heat recovery, obtains cooling semicoke and superheated steam;Product semicoke after cooling is steamed by cooling down semicoke outlet discharge, overheat Vapour is exported by the superheated steam and discharged, and the temperature control of superheated steam is at 200 DEG C.
Superheated steam is delivered to the air-flow that air-classifier 3 is used as pneumatic separation.
Semicoke after cooling is subjected to ionization meter on pressure testing machine, its compression strength is 607N;After cooling half Burnt volatile matter content is 4.52%, content of ashes 14.29%.
Embodiment 4
As shown in Fig. 2, preparing the method for semicoke using system as described above, comprise the steps of:
Low-order coal is fed through from coal bunker 1 to low-order coal entrance through bucket elevator into carrying out screening in screening plant 2 Level, 2 aperture of screening plant is 5mm, is divided into the upper lump coal of sieve and minus sieve coal;Lump coal is under the upper lump coal outlet discharge of sieve, sieve on sieve Fine coal is discharged from minus sieve coal export;
Fine coal is delivered to air-classifier 3 by minus sieve coal entrance and carries out pneumatic separation, sorts the air-flow of air-flow Speed is 6m/s, obtains powder cleaned coal;
Powder cleaned coal obtained above and binding agent are carried out carrying out kneading in kneading device 4 according to 1: 0.1 mass ratio Processing, incorporation time 7min, obtains mixed material;Mixed material exports discharge from the mixed material of kneading device 4;Will mixing Material is delivered in molding machine 5 by mixed material entrance and carries out forming processes, obtains shaping pelletizing, and briquetting pressure is 16Mpa;It is molded pelletizing to discharge from the outlet of shaping pelletizing, forming unit balling ratio is 86.23%;
Shaping pelletizing is subjected to pyrolysis processing, pyrolysis temperature 800 by being molded pelletizing entrance in revolving bed pyrolysis installation 6 DEG C, pyrolysis time 2h, obtains pulverized coal pyrolysis semicoke and pulverized coal pyrolysis coal gas;Pulverized coal pyrolysis semicoke is exported from pyrolysis char and discharged, Pulverized coal pyrolysis coal gas is discharged from pyrolysis gas exit;
The upper lump coal of sieve is delivered to the upper lump coal entrance of sieve through belt and carries out pyrolysis processing into revolving bed pyrolysis installation 6, heat It is 800 DEG C, pyrolysis time 2h to solve temperature, obtains lump coal pyrolysis char and lump coal pyrolysis coal gas;Lump coal pyrolysis char is from pyrolysis half Jiao outlet discharge, lump coal are pyrolyzed coal gas from pyrolysis gas exit discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis coal gas by be pyrolyzed gas entry be delivered to coal gas cooling device 8 into Row cooling, obtains burnt oil and gas;Tar is discharged from tar outlet, and coal gas is discharged from gas exit;
Tar is delivered to tar oxidation unit 9 by tar entrance and carries out oxidation processes, oxidation temperature 300 DEG C, oxidization time 2h, oxidant is air, air mass flow 10L/h, obtains the binding agent of powder cleaned coal shaping, and from viscous Tie agent outlet discharge;
By lump coal pyrolysis char and/or pulverized coal pyrolysis semicoke by pyrolysis char entrance be delivered to waste-heat recovery device 7 into Row waste heat recovery, obtains cooling semicoke and superheated steam;Product semicoke after cooling is steamed by cooling down semicoke outlet discharge, overheat Vapour is exported by the superheated steam and discharged, and the temperature control of superheated steam is at 150 DEG C.
Superheated steam is delivered to the air-flow that air-classifier 3 is used as pneumatic separation.
Semicoke after cooling is subjected to ionization meter on pressure testing machine, its compression strength is 523N;After cooling half Burnt volatile matter content is 5.34%, content of ashes 17.23%.
Comparative example
First, raw coal is sent into screening plant from coal bunker through bucket elevator, and screening plant aperture is 5mm, obtains sieving block Coal and minus sieve coal;The upper lump coal of gained sieve is delivered to revolving bed pyrolysis installation through belt to be pyrolyzed, pyrolysis temperature 700 DEG C, pyrolysis time 1h, obtains pyrolysis char and pyrolysis coal gas;Pyrolyzing coal pneumatic transmission is entered into cooling device, obtains burnt oil and gas; Gained minus sieve material is sent to press ball device, pressure 18Mpa, obtains shaping pelletizing, forming unit balling ratio is 55.29%; It is 700 DEG C that shaping pelletizing, which is sent to revolving bed pyrolysis installation, pyrolysis temperature, and pyrolysis time 1h, obtains pyrolysis char and pyrolysis Coal gas;Pyrolysis char is subjected to heat recovery by waste-heat recovery device, obtains cooling semicoke and superheated steam.
Cooling semicoke is subjected to ionization meter on pressure testing machine, its compression strength is 334N;Cool down semicoke volatile matter Content is 7.96%, content of ashes 36.75%.
Comparative example is compared with the technical solution of embodiment 1-4, for not setting pneumatic separation in the processing of fine coal Device 3 and kneading device 4, and oxidation processes are not carried out yet to tar.As can be seen that the semicoke that comparative example obtains is in resistance to compression The semicoke of the utility model preparation is below in the performance of intensity, semicoke volatile matter content and content of ashes.Also, embodiment 1- Utilize the superheated steam in waste-heat recovery device 7 to be used as the air-flow of air-classifier 3 in 4, reach energy recycling Spoil, the troilite being enriched with effect and exclusion fine coal, reduce powder pit ash, sulphur powder, improve fine coal caloric value, increase powder Coal balling ratio, so improve pyrolysis after semicoke quality and reduce environmental pollution.Tar oxidation unit is also utilized in embodiment 1-4 The binding agent of output eliminates the supplying of outer adding additives or caking coal, reduces as the binding agent in kneading device 4 in 9 Caking coal eliminates extra binding agent cost to selecting factory to build the requirement of location.
The above is only the preferred embodiment of the present invention, is not used for limiting the scope of the utility model; If not departing from the spirit and scope of the utility model, to the utility model technical scheme is modified or replaced equivalently, should all cover Among the protection domain of the utility model claims.

Claims (4)

1. the system that a kind of low-order coal prepares semicoke, it is characterised in that include:
Screening plant, the screening plant be used for by low-order coal carry out block powder separation, the screening plant include low-order coal entrance, Lump coal outlet and minus sieve coal export on sieve;
Air-classifier, the air-classifier are used to fine coal progress pneumatic separation obtaining powder cleaned coal, the air-flow point It is superheated steam to select the air-flow used;The air-classifier includes superheated steam entrance, minus sieve coal entrance, tail gas and goes out Mouth, spoil outlet and the outlet of powder cleaned coal;The minus sieve coal entrance is connected with the minus sieve coal export of the screening plant;
Kneading device, the kneading device are used to be mixed powder cleaned coal;The kneading device includes powder cleaned coal entrance, bonding Agent entrance and mixed material outlet, the powder cleaned coal entrance are connected with the powder cleaned coal outlet of the air-classifier;
Tar oxidation unit, the tar oxidation unit are used to tar progress oxidation processes obtaining binding agent;The tar oxygen Makeup is put comprising tar entrance and binding agent outlet, the binding agent outlet and the binding agent entrance phase of the kneading device Even;
Molding machine, the molding machine are used for the shaping of pelletizing;The molding machine includes mixed material entrance and shaping ball Group outlet, the mixed material entrance are connected with the mixed material outlet of the kneading device;
Pyrolysis installation, the pyrolysis installation are used to lump coal and shaping pelletizing being pyrolyzed;The pyrolysis installation includes and waits to be pyrolyzed Material inlet, pyrolysis char outlet and pyrolysis gas exit;The material inlet the to be pyrolyzed institute with the screening plant respectively The upper lump coal outlet of sieve is stated with the shaping pelletizing outlet of the molding machine to be connected.
2. the system that low-order coal as claimed in claim 1 prepares semicoke, it is characterised in that the system also includes:
Coal gas cooling device, the coal gas cooling device include pyrolysis gas entry, tar outlet and gas exit, the pyrolysis Gas entry is connected with the pyrolysis gas exit of the pyrolysis installation, the tar outlet and the tar oxidation unit The tar entrance is connected.
3. the system that low-order coal as claimed in claim 1 prepares semicoke, it is characterised in that the system also includes:
Waste-heat recovery device, the waste-heat recovery device include pyrolysis char entrance, the outlet of cooling semicoke and superheated steam outlet, The superheated steam outlet is connected with the superheated steam entrance of the air-classifier, for the waste heat recovery to be filled The superheated steam put is used as the air-flow that the air-classifier pneumatic separation uses.
4. the system that low-order coal as claimed in claim 3 prepares semicoke, it is characterised in that the waste-heat recovery device it is described Pyrolysis char entrance is connected with the pyrolysis char outlet of the pyrolysis installation;The cooling semicoke outlet is used to export production Product.
CN201721219596.XU 2017-09-21 2017-09-21 The system that a kind of low-order coal prepares semicoke Active CN207243818U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111718737A (en) * 2020-06-29 2020-09-29 中国科学院过程工程研究所 Process method and system device for preparing high-quality oil gas by pyrolyzing low-caking coal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111718737A (en) * 2020-06-29 2020-09-29 中国科学院过程工程研究所 Process method and system device for preparing high-quality oil gas by pyrolyzing low-caking coal
CN111718737B (en) * 2020-06-29 2021-07-09 中国科学院过程工程研究所 Process method and system device for preparing high-quality oil gas by pyrolyzing low-caking coal

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