CN104877695B - Integrated system for pyrolysis and upgrading of coal - Google Patents

Integrated system for pyrolysis and upgrading of coal Download PDF

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Publication number
CN104877695B
CN104877695B CN201510299057.0A CN201510299057A CN104877695B CN 104877695 B CN104877695 B CN 104877695B CN 201510299057 A CN201510299057 A CN 201510299057A CN 104877695 B CN104877695 B CN 104877695B
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coal
rotating cylinder
pyrolysis
upgraded
unit
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CN104877695A (en
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谢文
王守峰
李万善
刘新
张朝蓉
江昊沛
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SHAANXI COAL AND CHEMICAL INDUSTRY GROUP SHENMU TIANYUAN CHEMICAL INDUSTRY Co Ltd
Hualu Engineering and Technology Co Ltd
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SHAANXI COAL AND CHEMICAL INDUSTRY GROUP SHENMU TIANYUAN CHEMICAL INDUSTRY Co Ltd
Hualu Engineering and Technology Co Ltd
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Abstract

The invention relates to an integrated system for pyrolysis and upgrading of coal. The integrated system is provided with a drying and pyrolysis unit, an upgraded-coal cooling unit and a humidifying and discharging unit in sequence along the process route in a connection manner. The integrated system has the advantages that coal drying and coal pyrolysis reactions are finished in a same rotary drum by the drying and pyrolysis unit, so that the equipment investment is effectively reduced and the process reliability is improved; cold air in the upgraded-coal cooling unit is utilized for indirectly cooling materials in material-distributing tube nest, the equipment is simple and good in safety, the yield of waste water and waste gas is low, hot air obtained after heat exchange is utilized for heat recovery and reutilization of heat; in the process of utilizing a spiral conveyor in the humidifying and discharging unit to carry out conveying on upgraded coal, a sprayer is adopted for carrying out water spraying and humidification on the upgraded coal, the operation is simple and reliable, the water spraying amount can be adjusted according to the process need, the quality of a product is good and the process is environmental-friendly.

Description

A kind of improving quality of coal by pyrolysis integration integrated system
Technical field
The present invention relates to a kind of improving quality of coal by pyrolysis integration integrated system, belongs to the technical field of improving quality of coal by pyrolysis.
Background technology
China is the country of a rich coal resources and petroleum and natural gas resource scarcity relatively, recently as me Going from bad to worse for state's northern area atmospheric environment, is to reduce coal directly impact of the burning to environment, while improving coal resources Utilization rate, both at home and abroad the increasing mechanism and scholar coal sub-prime that begins one's study utilize technology, will be during feed coal carries out Low temperature pyrogenation, obtains a kind of coal utilization method of coal gas, coal tar and the upgraded coal of high value.
At present, the coal pyrolysis process for upgrading that the country is adopted, is realized using three sets of autonomous system series connection more, that is, be dried Stove, carbonization reaction stove and cooling (quenching) stove connect to form pyrolysis process for upgrading core.Chinese patent literature CN102250633A discloses a kind of method that external heat type rotary furnace carries out brown coal upgrading, and concrete steps include;(1) by raw material Brown coal send into rotary drying stove, raw material brown coal temperature is dried in the environment of 100~300 DEG C and 20~40 points of desorption Clock, removes gas of the moisture and absorption in brown coal in the pore of coal;(2) it is dried and enters revolution carbonization with the coal after desorption Stove is pyrolyzed upgrading, thermal cracking 40min~120min at 450~700 DEG C of temperature of charge, semicoke is obtained after thermal cracking upgrading and is contained Have a high temperature rough gas of tar, turn round the operating pressure of retort between pressure-fired and tiny structure, concrete numerical value for ± 500mmH2O;(3) semicoke produced after pyrolysis upgrading is discharged by the stove tail for turning round retort, is sent into revolution and is cooled down stove quenching Cooling, the semicoke after cooling is re-fed into sieving the finished product semicoke that coke installation screening obtains different-grain diameter;(4) after thermal cracking upgrading The high temperature rough gas containing tar for producing are derived by retort airway is turned round, and into pitch coal edema caused by disorder of QI from purification devices, are carried out Absorb and purification, obtain high-quality tar finished product and high heating value gas finished product;A portion finished product coal gas and air send into combustion Stove burning is burnt, the heat smoke after burning is sent in revolution carbonization reaction stove chuck as the thermal source of material itself thermal cracking, heating The heat smoke with certain calorific value is sent to rotary drying stove and is dried raw coal by high-temperature blower after complete material.However, above-mentioned technique stream Cheng Zhong, is required to special between rotary drying stove and revolution carbonization reaction stove, between revolution carbonization reaction stove and revolution cooling stove Setting needs strict seal between connecting device, and three sets of system of bf body, but for the sealing of high-temp solid material is skill all the time Art difficult point, therefore, above-mentioned technique has that number of devices is more, device is huge, arrangement is complicated, reliability of technology is low, energy consumption is high etc. lacks Point, further, since containing a large amount of dust in feed coal, easily causes equipment pipe to block, and follow-up oil gas product dedusting work Amount is big.
The content of the invention
The technical problem to be solved is to propose a kind of simple structure, energy-efficient, eco-friendly coal heat Solution upgrading integration integrated system.
To solve above-mentioned technical problem, the technical scheme is that:
A kind of improving quality of coal by pyrolysis integration integrated system, it is sequentially connected along process route and is provided with dry thermal cracking unit, carries Matter coal cooling unit and humidification discharging unit;
The dry thermal cracking unit, including horizontally set rotating cylinder and be sheathed on the rotating cylinder side-wall outer side External jacket, form exhaust gases passes between the rotating cylinder and the external jacket;The front end of the rotating cylinder is provided with charging Mouthful, the rear end of the rotating cylinder is provided with discharging opening;
Include dryer section, conversion zone and soaking zone successively along rotating cylinder described in process route direction, in the dryer section Liao Feng areas are provided with conversion zone boundary, the Liao Feng areas are provided with center inner core and the spiral shell being located on the outside of the center inner core Rotation, with the rotating cylinder to be coaxially disposed, vertically the tip height of the center inner core is less than the center inner core Height of materials in the rotating cylinder;It is axially arranged with some instead in the inside of the conversion zone and along the rotating cylinder Section heating tube, the conversion zone heating tube is answered to be distributed and the conversion zone heating tube along the inwall even circumferential of the rotating cylinder Two ends be fixed on the rotating cylinder, be axially arranged with some in the inside of the soaking zone and along the rotating cylinder Soaking zone heating tube, the soaking zone heating tube is distributed along the inwall even circumferential of the rotating cylinder and the soaking zone is heated The two ends of pipe are fixed on the rotating cylinder,
Dry flue gas outlet, dry flue gas import are sequentially provided with along external jacket described in process route direction, add heat smoke Outlet, heating gas approach and insulation exhanst gas outlet;The dry flue gas import passes through a connecting tube with the center inner core Connection is arranged;The two ends of the conversion zone heating tube connect respectively with the heating exhanst gas outlet and the heating gas approach; The two ends of the soaking zone heating tube connect respectively with the heating gas approach and the insulation exhanst gas outlet;
The upgraded coal cooling unit, including longitudinally disposed cylinder and positioned at the inner barrel vertically Several cloth tubulations be arrangeding in parallel, the top of the cylinder connects setting, institute with the discharging opening of the dry thermal cracking unit The top for stating cylinder is provided with hot air outlet, and bottom is provided with inlet of cold air and vapor outlet;
The humidification discharging unit, setting is connected with the bottom of the cylinder, and the humidification discharging unit includes spiral transferring Machine and spray thrower, the spray thrower is sent to be located at the top of the conveying worm and enter with the conveying material to the conveying worm Row spray process.
Two flue gas shunting devices, the flue gas are set at the heating gas approach, positioned at the inner side of the external jacket Diverter is herringbone flow distribution plate.
Setting feeder is connected with the charging aperture of the rotating cylinder, the feeder is elephant trunk or feeding screw.
Connect with the front end of the rotating cylinder and be provided with ash discharge case, the bottom of the ash discharge case is provided with ash discharging hole, the row The side wall of ash bin is provided with gas outlet;
Connect with the rear end of the rotating cylinder and be provided with feed box, the bottom of the feed box is provided with discharging opening, it is described go out Air guide port is provided with the top of hopper.
Along the central axial of the rotating cylinder, it is total that the length of the dryer section, conversion zone and soaking zone accounts for rotating cylinder Long percentage ratio is followed successively by 40%~45%, 40%~45%, 10%~20%.
Along the central axial of the rotating cylinder, the length of the conversion zone heating tube is less than or equal to the reaction segment length Degree, the length of the soaking zone heating tube is less than or equal to the length of the soaking zone.
Vertically, the height of materials in the rotating cylinder be higher by 100 than the bottom of the center inner core~ 200mm。
Material distributor is provided with the inner barrel and above the cloth tubulation.
A diameter of DN200~DN400 of the cloth tubulation, the length of the cloth tubulation and the length of the cylinder it Than for 0.8:1~1:1.
It is also connected with arranging weight induction device or material position induction installation with the upgraded coal cooling unit.
Improving quality of coal by pyrolysis integration integrated system of the present invention, technological process is as follows:
(1) feed coal enters the dry thermal cracking unit, first between the dryer section is passed through using heat smoke to feed coal Connect heating and direct-fired compound mode is dried process, the water content of feed coal is down to less than 0.5% and is done Dry coal;While being dried to feed coal, trickle coal dust in feed coal is taken away simultaneously with the flue gas of feed coal directly contact Remove;Afterwards, reverse-flow indirectly heat is carried out to the moisture-free coal using heat smoke in the conversion zone, the moisture-free coal is added Heat to 350~600 DEG C carries out pyrolytic reaction, and reaction generates tar gas, coal gas and upgraded coal, and the upgraded coal enters the insulation Parallel type heating is carried out using heat smoke after section, insulation a period of time makes the Volatile in the upgraded coal;And will be described Tar gas and coal gas are derived, and obtain high temperature upgraded coal into the upgraded coal cooling unit;
(2) in the upgraded coal cooling unit, indirect heat exchange cooling is carried out to the high temperature upgraded coal using cold air, will The temperature of the high temperature upgraded coal is reduced within 200 DEG C, and the hot-air obtained after heat exchange carries out heat recovery;
(3) upgraded coal after cooling enters the humidification discharging unit, and spray thrower pair is utilized during discharging The upgraded coal carries out work of water sprinkling for better material moisture, while further lowered the temperature to upgraded coal, the upgraded coal from discharging opening discharge when, i.e., It is with certain water content and temperature is 70 DEG C or so of upgraded coal finished product.
The above-mentioned technical proposal of the present invention has compared to existing technology advantages below:
(1) improving quality of coal by pyrolysis integration integrated system of the present invention, is sequentially connected along process route and is provided with described dry Dry pyrolysis unit, upgraded coal cooling unit and humidification discharging unit, first, are dried by coal in the setting dry thermal cracking unit Complete in same rotating cylinder with pyrolysis of coal reaction, it is to avoid due to setting with pyrolytic reaction in drying equipment in prior art The special problem for arranging linking equipment, causing system sealing difference, while equipment investment can also effectively be reduced, improves between standby Reliability of technology, and the present invention is when feed coal dried is carried out, and can simultaneously remove trickle coal dust, is conducive to subsequent technique Operation, it is ensured that pyrolysis of coal reaction can run steadily in the long term, and dust is easily caused in pyrolytic process of coal in effectively solving prior art Equipment pipe is blocked and the big problem of follow-up oil gas product dedusting workload;
Secondly, by being carried out indirectly to the material in cloth tubulation using cold air in the setting upgraded coal cooling unit Cooling, equipment is simple, and safety is good, waste water and gas low yield, and the hot-air obtained after heat exchange carries out heat recovery recycling;
Finally, by arrange it is described humidification discharging unit in the process conveyed to upgraded coal using conveying worm In, work of water sprinkling for better material moisture is carried out to upgraded coal using the spray thrower, operation is simple and reliable, and can be needed to adjust water spray according to technique Amount, good product quality is environmental friendly, also, by connecting the conveying worm in the lower end of the upgraded coal cooling unit Carry out cooling down the direct conveying after upgraded coal discharging such that it is able to realize being adjusted by using the revolution speed of screw of the conveying worm The height of materials in the cylinder of the upgraded coal cooling unit is saved, while the sealing of material is realized, without the need for setting up other things again Material water-tight equipment.
(2) improving quality of coal by pyrolysis integration integrated system of the present invention, by heating gas approach, positioned at described The inner side of external jacket arranges two flue gas shunting devices, in the presence of the flue gas shunting device, heat smoke from plus heat smoke Import is divided into three parts after entering, Part I heat smoke positioned at the flue gas between the conversion zone and the external jacket by leading to Road to the heating exhanst gas outlet positioned at the conversion zone front end is moved, and Part II heat smoke is heated by the conversion zone Pipe to the heating exhanst gas outlet positioned at the conversion zone front end is moved, and Part III heat smoke is by positioned at the soaking zone With the exhaust gases passes between the external jacket and the soaking zone heating tube to the insulation cigarette positioned at the soaking zone rear end Gas outlet movement, first, second partial fume provides upgraded coal pyrolytic reaction heat, and Part III flue gas is incubated to upgraded coal Heat is provided, so as to be conducive to improving upgrading pyrolysis of coal efficiency and product ature of coal amount.
(3) improving quality of coal by pyrolysis integration integrated system of the present invention, by connecting with the front end of the rotating cylinder It is provided with ash discharge case such that it is able to which the trickle coal dust that flue gas is taken away when feed coal is dried into process carries out unifying to collect, and enters one Step guarantees that pyrolysis of coal reaction can run steadily in the long term, is prevented effectively from dust and easily causes equipment pipe blocking and follow-up oil gas product The big problem of dedusting workload.
(4) improving quality of coal by pyrolysis integration integrated system of the present invention, by being connected with the upgraded coal cooling unit Weight induction device or material position induction installation are set, and the spiral for being advantageously implemented conveying worm described in Automated condtrol turns Speed, i.e. automatization adjust the discharging speed of the upgraded coal cooling unit, so that in the upgraded coal cooling unit cylinder Height of materials remain at certain altitude, realize the upgraded coal cooling unit discharge outlet material sealing.
Description of the drawings
In order that present disclosure is more likely to be clearly understood, the specific embodiment below according to the present invention is simultaneously combined Accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of improving quality of coal by pyrolysis integration integrated system of the present invention.
Reference is expressed as in figure:1- gas outlets, 2- ash discharge casees, 3- feeders, the outlet of 4- dry flue gas, 5- revolutions Cylinder, 6- external jackets, 7- dryer sections, 8- spirals, 9- dry flue gas imports, 10- connecting tubes, 11- centers inner core, 12- heating cigarettes Gas is exported, 131- conversion zone heating tubes, 132- soaking zone heating tubes, 14- conversion zones, 15- heating gas approach, 16- flue gases point Stream device, 17- soaking zones, 18- insulation exhanst gas outlets, 19- air guide ports, 20- feed boxes, 21- feed box discharging openings, 22- upgraded coals Cooling unit charging aperture, 23- material distributors, 24- cylinders, 25- hot air outlets, 26- cloth tubulations, 27- inlet of cold airs, 28- vapor outlets, 29- upgraded coal cooling unit discharging openings, 30- humidification discharging unit charging apertures, 31- spray throwers, 32- spiral shells Rotation conveyer, 33- humidification discharging unit discharging openings, 34- ash discharging holes.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of improving quality of coal by pyrolysis integration integrated system, is sequentially connected along process route and is provided with dry heat Solution unit, upgraded coal cooling unit and humidification discharging unit.
The dry thermal cracking unit includes the rotating cylinder 5 of horizontally set and is sheathed on outside the side wall of the rotating cylinder 5 The external jacket 6 of side, between the rotating cylinder 5 and the external jacket 6 exhaust gases passes are formed;The front end of the rotating cylinder 5 sets The rear end for having charging aperture, the rotating cylinder 5 is provided with discharging opening.
Include dryer section 7, conversion zone 14 and soaking zone 17, this enforcement successively along rotating cylinder 5 described in process route direction In example, along the central axial of the rotating cylinder 5, the length of the dryer section 7, conversion zone 14 and soaking zone 17 accounts for rotating cylinder The percentage of overall length is respectively 40%, 40%, 10%, in the present embodiment, the dryer section 7, conversion zone 14 and soaking zone 17 Length be respectively 35m, 35m, 10m.
Liao Feng areas are provided with the dryer section 7 and the boundary of conversion zone 14, the Liao Feng areas are provided with center inner core 11 and ring Located at the spiral 8 in the outside of the center inner core 11, the center inner core 11 with the rotating cylinder 5 to be coaxially disposed, it is described in The external diameter of intracardiac cylinder 11 determines by the internal diameter of rotating cylinder 5 and height of materials, specially:Height of materials-(internal diameter of rotating cylinder- The external diameter of center inner core)/2=200mm, in the present embodiment, the internal diameter of the rotating cylinder 5 is 3800mm, and height of materials is 1100mm, the external diameter of the center inner core 11 is 2000mm, to ensure the height of materials in the vertically rotating cylinder 5 200mm is higher by than the bottom of the center inner core 11 so that material forms material envelope when by the spiral 8, to prevent pyrolysis Reacting gas scurries into the dryer section 7.
In the present embodiment, add inside the conversion zone 14, along 20 conversion zones that are axially arranged with of the rotating cylinder 5 Heat pipe 131, to increase the heat exchange area of conversion zone 14;The conversion zone heating tube 131 is along the inwall even circumferential of rotating cylinder 5 point Cloth, the spacing and the adjacent conversion zone heating tube 131 between the conversion zone heating tube 131 and the inwall of rotating cylinder 5 it Between spacing be 200mm, the two ends of the conversion zone heating tube 131 are weldingly fixed on the rotating cylinder 5.
It is axially arranged with 20 soaking zone heating tubes 132 inside the soaking zone 17, along the rotating cylinder 5, with Increase the heat exchange area of soaking zone 17;The soaking zone heating tube 132 is distributed along the inwall even circumferential of rotating cylinder 5, described The spacing between spacing and the adjacent soaking zone heating tube 132 between soaking zone heating tube 132 and the inwall of rotating cylinder 5 It is 200mm;The two ends of the soaking zone heating tube 132 are weldingly fixed on the rotating cylinder 5.
In the present embodiment, the conversion zone heating tube 131 and the soaking zone heating tube 132 are using the seamless of DN300 Steel pipe, the length of the conversion zone heating tube 131 is equal to the length of the conversion zone, the length of the soaking zone heating tube 132 Equal to the length of the soaking zone.
Dry flue gas outlet 4, dry flue gas import 9, heating cigarette are sequentially provided with along external jacket 6 described in process route direction Gas outlet 12, heating gas approach 15 and insulation exhanst gas outlet 18;The dry flue gas import 9 passes through with the center inner core 11 One connection of connecting tube 10 is arranged;Heat exhanst gas outlet 12 and the heating with described respectively in the two ends of the conversion zone heating tube Gas approach 15 is connected;Heat gas approach 15 and the insulation cigarette with described respectively in the two ends of the soaking zone heating tube 132 Gas outlet 18 is connected;Two flue gas shunting devices are set at the heating gas approach 15, positioned at the inner side of the external jacket 6 16。
In the present embodiment, the flue gas shunting device 16 is herringbone flow distribution plate.In the presence of the flue gas shunting device 16, Heat smoke is divided into three parts after entering from heating gas approach 15, and Part I heat smoke is by positioned at the conversion zone 14 and institute The exhaust gases passes stated between external jacket 6 are moved to the heating exhanst gas outlet 12 positioned at the front end of the conversion zone 14, second Heat smoke is divided to move to the heating exhanst gas outlet 12 positioned at the front end of the conversion zone 14 by the conversion zone heating tube 131 Dynamic, Part III heat smoke is by positioned at the exhaust gases passes and soaking zone heating between the soaking zone 17 and the external jacket 6 Pipe 132 to the insulation exhanst gas outlet 18 positioned at the rear end of the soaking zone 17 is moved, and first, second partial fume is to upgraded coal Pyrolytic reaction provides heat, and Part III flue gas provides heat to upgraded coal insulation, so as to be conducive to improving upgrading pyrolysis of coal effect Rate and product ature of coal amount.
The upgraded coal cooling unit includes that longitudinally disposed cylinder 24 and the edge inside the cylinder 24 are vertical Several cloth tubulations 26 that direction be arranged in parallel, in the present embodiment, the diameter of the cloth tubulation takes DN200, the cloth The length of tubulation is 0.9 with the length ratio of the cylinder:1.The top of the cylinder 24 is provided with the charging of upgraded coal cooling unit Mouth 22, the upgraded coal cooling unit charging aperture 22 connects setting, the cylinder 24 with the discharging opening of the dry thermal cracking unit Top be provided with hot air outlet 25, bottom is provided with inlet of cold air 27 and vapor outlet 28, and it is cold that bottom is provided with upgraded coal But unit discharging opening 29.
The humidification discharging unit connect settings with the bottom of the cylinder 24, it is described be humidified discharging unit charging aperture 30 and The upgraded coal cooling unit discharging opening 29 is docked.The humidification discharging unit includes conveying worm 32 and spray thrower 31, institute State spray thrower 31 carries out spray increasing positioned at the top of the conveying worm 32 with the conveying material to the conveying worm 32 Wet process, the upgraded coal finished product after humidification is discharged by the discharging unit discharging opening 33 that is humidified, in humidification process produce vapor and Dust is discharged from the vapor outlet 28 of the upgraded coal cooling unit.
Based on the improving quality of coal by pyrolysis integral process of the improving quality of coal by pyrolysis integral system described in the present embodiment, technological process It is as follows:
(1) feed coal is entered after dry thermal cracking unit, is dried process in dryer section 7 first, and heat smoke is to feed coal By indirectly and directly combined heated mode, the water content of feed coal is down to less than 0.5%, feed coal is being dried While, with the flue gas of feed coal directly contact trickle coal dust in feed coal is taken away and removed;Afterwards, in the conversion zone 14 Adverse current indirectly heat is carried out to moisture-free coal using heat smoke, moisture-free coal is heated to 350~600 DEG C and carries out pyrolytic reaction, reacted Tar gas, coal gas and upgraded coal are generated, upgraded coal is entered and heated by heat smoke cocurrent after soaking zone 17, held for some time, with Ensure that volatile matters are separated out to a certain extent in upgraded coal, tar gas and coal gas are derived, the high temperature upgraded coal Jing discharging opening for obtaining Into upgraded coal cooling unit;
(2) high temperature upgraded coal is entered after upgraded coal cooling unit, and indirect heat exchange is carried out to upgraded coal using cold air, will be carried Matter coal temperature is reduced within 200 DEG C, and the hot-air obtained after heat exchange carries out separately being used it for anything else after heat recovery;
(3) upgraded coal after cooling down enters humidification discharging unit, is sprayed water using spray thrower 31 during discharging Humidification, while further lowered the temperature to upgraded coal, the upgraded coal from discharging opening discharge when, as with certain water content and temperature Spend the upgraded coal finished product for 70 DEG C or so.
Improving quality of coal by pyrolysis integration integrated system described in the present embodiment, is provided with described by being sequentially connected along process route Dry thermal cracking unit, upgraded coal cooling unit and humidification discharging unit, first, are done by coal in the setting dry thermal cracking unit Dry and pyrolysis of coal reaction is completed in same rotating cylinder 5, it is to avoid due in drying equipment and being pyrolyzed anti-in prior art The special problem for linking equipment being set, causing system sealing difference between equipment is answered, while equipment investment can also effectively be reduced, is carried High reliability of technology, and the present invention is when feed coal dried is carried out, and can simultaneously remove trickle coal dust, is conducive to follow-up Technological operation, it is ensured that pyrolysis of coal reaction can run steadily in the long term, and dust is easy in pyrolytic process of coal in effectively solving prior art Equipment pipe is caused to block and the big problem of follow-up oil gas product dedusting workload;Secondly, by arranging the upgraded coal cooling In unit the material in cloth tubulation 26 is cooled down indirectly using cold air, equipment is simple, and safety is good, waste water and gas are produced Rate is low, and the hot-air obtained after heat exchange carries out heat recovery recycling;Finally, by arrange it is described humidification discharging unit in profit During being conveyed to upgraded coal with conveying worm 32, work of water sprinkling for better material moisture is carried out to upgraded coal using the spray thrower 31, Operation is simple and reliable, and can be needed to adjust injection flow rate according to technique, and good product quality is environmental friendly, also, by carrying described The lower end of matter coal cooling unit connects the conveying worm 32 to carry out cooling down the direct conveying after upgraded coal discharging such that it is able to Realize adjusting the material in the cylinder 24 of the upgraded coal cooling unit by using the revolution speed of screw of the conveying worm 32 Highly, while realizing the sealing of material, without the need for setting up unclassified stores water-tight equipment again.
Embodiment 2
The present embodiment provides a kind of improving quality of coal by pyrolysis integration integrated system, its structure as shown in figure 1, along process route according to It is secondary to be connected with dry thermal cracking unit, upgraded coal cooling unit and humidification discharging unit.
The dry thermal cracking unit includes the rotating cylinder 5 of horizontally set and is sheathed on the outside of the rotating cylinder 5 External jacket 6, between the rotating cylinder 5 and the external jacket 6 exhaust gases passes are formed;The front end of the rotating cylinder 5 be provided with into Material mouth, the rear end of the rotating cylinder 5 is provided with discharging opening.As preferred embodiment, in the present embodiment, with the revolving drum The charging aperture connection of body 5 arranges feeder 3, and the feeder 3 is elephant trunk;The row of being provided with is connected with the front end of the rotating cylinder 5 Ash bin 2, the bottom of the ash discharge case 2 is provided with ash discharging hole 34, and the side wall of the ash discharge case 2 is provided with gas outlet 1;With described time The rear end connection of drum body 5 is provided with feed box 20, and the bottom of the feed box 20 is provided with feed box discharging opening 21, the feed box 20 top is provided with air guide port 19, and on the side wall of the feed box 20 inspection manhole (not shown) is additionally provided with.
Include dryer section 7, conversion zone 14 and soaking zone 17, this enforcement successively along rotating cylinder 5 described in process route direction In example, along the central axial of the rotating cylinder 5, the length of the dryer section 7, conversion zone 14 and soaking zone 17 accounts for rotating cylinder The percentage of overall length is respectively 45%, 45%, 10%.
Liao Feng areas are provided with the dryer section 7 and the boundary of conversion zone 14, the Liao Feng areas are provided with center inner core 11 and ring Located at the spiral 8 in the outside of the center inner core 11, the center inner core 11 is to be coaxially disposed with the rotating cylinder 5, this enforcement In example, the external diameter of the center inner core 11 is determined by the internal diameter of rotating cylinder 5 and height of materials, specially:Height of materials-(revolution The external diameter of the internal diameter of cylinder-center inner core)/2=100mm, to ensure the bottom height of the vertically center inner core 11 Less than the height of materials in the rotating cylinder 5 so that material forms material envelope when by the spiral 8, to prevent pyrolysis anti- Gas is answered to scurry into the dryer section 7.
In the present embodiment, inside the conversion zone 14, along the rotating cylinder 5 48 conversion zones are axially arranged with Heating tube 131, to increase the heat exchange area of conversion zone 14;The conversion zone heating tube 131 is along the inwall even circumferential of rotating cylinder 5 Distribution, the spacing and the adjacent conversion zone heating tube 131 between the conversion zone heating tube 131 and the inwall of rotating cylinder 5 Between spacing be 120mm, the two ends of the conversion zone heating tube 131 are weldingly fixed on the rotating cylinder 5.
It is axially arranged with 48 soaking zone heating tubes 132 inside the soaking zone 17, along the rotating cylinder 5, To increase the heat exchange area of soaking zone 17;The soaking zone heating tube 132 is distributed along the inwall even circumferential of rotating cylinder 5, institute Between stating between the spacing and the adjacent soaking zone heating tube 132 between soaking zone heating tube 132 and the inwall of rotating cylinder 5 Away from being 120mm;The two ends of the soaking zone heating tube 132 are weldingly fixed on the rotating cylinder 5.
In the present embodiment, the conversion zone heating tube 131 and the soaking zone heating tube 132 are preferably using the nothing of DN200 Seam steel pipe, the length of the conversion zone heating tube 131 is slightly less than the length of the conversion zone, the soaking zone heating tube 132 Length is slightly less than the length of the soaking zone.
Dry flue gas outlet 4, dry flue gas import 9, heating cigarette are sequentially provided with along external jacket 6 described in process route direction Gas outlet 12, heating gas approach 15 and insulation exhanst gas outlet 18;The dry flue gas import 9 passes through with the center inner core 11 One connection of connecting tube 10 is arranged;Heat exhanst gas outlet 12 and the heating with described respectively in the two ends of the conversion zone heating tube Gas approach 15 is connected;Heat gas approach 15 and the insulation cigarette with described respectively in the two ends of the soaking zone heating tube 132 Gas outlet 18 is connected;Two flue gas shunting devices are set at the heating gas approach 15, positioned at the inner side of the external jacket 6 16。
In the present embodiment, the flue gas shunting device 16 is herringbone flow distribution plate.In the presence of the flue gas shunting device 16, Heat smoke is divided into three parts after entering from heating gas approach 15, and Part I heat smoke is by positioned at the conversion zone 14 and institute The exhaust gases passes stated between external jacket 6 are moved to the heating exhanst gas outlet 12 positioned at the front end of the conversion zone 14, second Heat smoke is divided to move to the heating exhanst gas outlet 12 positioned at the front end of the conversion zone 14 by the conversion zone heating tube 131 Dynamic, Part III heat smoke is by positioned at the exhaust gases passes and soaking zone heating between the soaking zone 17 and the external jacket 6 Pipe 132 to the insulation exhanst gas outlet 18 positioned at the rear end of the soaking zone 17 is moved, and first, second partial fume is to upgraded coal Pyrolytic reaction provides heat, and Part III flue gas provides heat to upgraded coal insulation, so as to be conducive to improving upgrading pyrolysis of coal effect Rate and product ature of coal amount.
The upgraded coal cooling unit includes that longitudinally disposed cylinder 24 and the edge inside the cylinder 24 are vertical Several cloth tubulations 26 that direction be arranged in parallel, in the present embodiment, the diameter of the cloth tubulation takes DN300, the cloth The length of tubulation is 0.8 with the length ratio of the cylinder:1.The top of the cylinder 24 is provided with the charging of upgraded coal cooling unit Mouth 22, the upgraded coal cooling unit charging aperture 22 connects setting, the top of the cylinder 24 with the feed box discharging opening 21 Hot air outlet 25 is provided with, bottom is provided with inlet of cold air 27 and vapor outlet 28, and bottom is provided with upgraded coal cooling unit Discharging opening 29.Used as preferred embodiment, the present embodiment is in the inside of the cylinder 24 and positioned at the upper of the cloth tubulation 26 Side is provided with material distributor 23, so that material is evenly distributed in each described cloth tubulation 26, using the cloth tubulation The material that cold air outside 26 is pointed in the cloth tubulation 26 is cooled down indirectly.
The humidification discharging unit connect settings with the bottom of the cylinder 24, it is described be humidified discharging unit charging aperture 30 and The upgraded coal cooling unit discharging opening 29 is docked.The humidification discharging unit includes conveying worm 32 and spray thrower 31, institute State spray thrower 31 carries out spray increasing positioned at the top of the conveying worm 32 with the conveying material to the conveying worm 32 Wet process, the upgraded coal finished product after humidification is discharged by the discharging unit discharging opening 33 that is humidified, in humidification process produce vapor and Dust is discharged from the vapor outlet 28 of the upgraded coal cooling unit.
As preferred embodiment, in the present embodiment, fill with upgraded coal cooling unit connect setting material position sensing Put, be advantageously implemented the revolution speed of screw of conveying worm 32 described in Automated condtrol, i.e. automatization and adjust the upgraded coal cooling The discharging speed of unit, so that the height of materials in the upgraded coal cooling unit cylinder 24 remains at certain height Degree, realizes the material sealing at the upgraded coal cooling unit discharging opening 29.
Based on the improving quality of coal by pyrolysis integral process of the improving quality of coal by pyrolysis integration integrated system described in the present embodiment, technique Flow process is as follows:
(1) feed coal is entered after dry thermal cracking unit by the feeder 3, is dried process in dryer section 7 first, Heat smoke, by indirectly and directly combined heated mode, the water content of feed coal is down to less than 0.5%, right to feed coal While feed coal is dried, the row is taken away and be blown into trickle coal dust in feed coal with the flue gas of feed coal directly contact Ash bin 2 carries out unifying to collect, and further ensures that pyrolysis of coal reaction can run steadily in the long term, is prevented effectively from dust and easily causes equipment Line clogging and the big problem of follow-up oil gas product dedusting workload;
Afterwards, adverse current indirectly heat is carried out to moisture-free coal using heat smoke in the conversion zone 14, moisture-free coal is heated to 350~600 DEG C carry out pyrolytic reaction, and reaction generates tar gas, coal gas and upgraded coal, and upgraded coal is entered after soaking zone 17 by hot cigarette Gas cocurrent is heated, and the feed box 20 is entered after held for some time, and the tar gas that pyrolytic reaction is generated and coal gas are derived, obtained The high temperature upgraded coal for arriving enters the upgraded coal cooling unit after feed box discharging opening 21 is discharged described in;
(2) high temperature upgraded coal is entered after the upgraded coal cooling unit, is divided upgraded coal using the material distributor 23 It is fitted in each cloth tubulation 26, indirect heat exchange is carried out using the cold air outside the cloth tubulation 26 and upgraded coal, to upgrading Coal is cooled down within 200 DEG C, and the upgraded coal after cooling is discharged from the upgraded coal cooling unit discharging opening 29, heat exchange The hot-air for obtaining afterwards carries out separately being used it for anything else after heat recovery;
(3) upgraded coal after cooling down enters humidification discharging unit, using spray thrower 31 to upgraded coal during discharging Work of water sprinkling for better material moisture is carried out, while further being lowered the temperature to upgraded coal, the upgraded coal is from the row of humidification discharging unit discharging opening 33 When going out, as with certain water content and temperature is 70 DEG C or so of upgraded coal finished product, the vapor that produces in humidification process and Dust is discharged from the vapor outlet 28 of the upgraded coal cooling unit.
Embodiment 3
The present embodiment provides a kind of improving quality of coal by pyrolysis integration integrated system, is sequentially connected along process route and is provided with dry heat Solution unit, upgraded coal cooling unit and humidification discharging unit.
The dry thermal cracking unit includes the rotating cylinder 5 of horizontally set and is sheathed on outside the side wall of the rotating cylinder 5 The external jacket 6 of side, between the rotating cylinder 5 and the external jacket 6 exhaust gases passes are provided with;The front end of the rotating cylinder 5 sets The rear end for having charging aperture, the rotating cylinder 5 is provided with discharging opening.As preferred embodiment, in the present embodiment, with described time The charging aperture connection of drum body 5 arranges feeder 3, and the feeder 3 is feeding screw;With the front end of the rotating cylinder 5 Connection is provided with ash discharge case 2, and the bottom of the ash discharge case 2 is provided with ash discharging hole 34, and the side wall of the ash discharge case 2 is provided with gas outlet 1;Connect with the rear end of the rotating cylinder 5 and be provided with feed box 20, the bottom of the feed box 20 is provided with feed box discharging opening 21, The top of the feed box 20 is provided with air guide port 19, and on the side wall of the feed box 20 inspection manhole is additionally provided with.
Include dryer section 7, conversion zone 14 and soaking zone 17, this enforcement successively along rotating cylinder 5 described in process route direction In example, along the central axial of the rotating cylinder 5, the length of the dryer section 7, conversion zone 14 and soaking zone 17 accounts for rotating cylinder The percentage ratio of overall length is followed successively by 42%, 42%, 16%.
Liao Feng areas are provided with the dryer section 7 and the boundary of conversion zone 14, the Liao Feng areas are provided with center inner core 11 and ring Located at the spiral 8 in the outside of the center inner core 11, the center inner core 11 is to be coaxially disposed with the rotating cylinder 5, this enforcement In example, the internal diameter of the rotating cylinder 5 is 5200mm, and height of materials is 1400mm, and the external diameter of the center inner core 11 is 2800mm, vertically the height of materials in the rotating cylinder 5 be higher by 200mm than the bottom of the center inner core 11, make Obtain material and material envelope is formed when by the spiral 8, to prevent pyrolytic reaction gas from scurrying into the dryer section 7.
In the present embodiment, inside the conversion zone 14, along the rotating cylinder 5 50 six roots of sensation conversion zones are axially arranged with Heating tube 131, to increase the heat exchange area of conversion zone 14;The conversion zone heating tube 131 is along the inwall even circumferential of rotating cylinder 5 Distribution, the spacing and the adjacent conversion zone heating tube 131 between the conversion zone heating tube 131 and the inwall of rotating cylinder 5 Between spacing be 80mm, the two ends of the conversion zone heating tube 131 are weldingly fixed on the rotating cylinder 5.
It is axially arranged with 50 six roots of sensation soaking zone heating tubes 132 inside the soaking zone 17, along the rotating cylinder 5, To increase the heat exchange area of soaking zone 17;The soaking zone heating tube 132 is distributed along the inwall even circumferential of rotating cylinder 5, institute Between stating between the spacing and the adjacent soaking zone heating tube 132 between soaking zone heating tube 132 and the inwall of rotating cylinder 5 Away from being 80mm;The two ends of the soaking zone heating tube 132 are weldingly fixed on the rotating cylinder 5.
In the present embodiment, the conversion zone heating tube 131 and the soaking zone heating tube 132 are using the seamless of DN250 Steel pipe, the length of the conversion zone heating tube 131 is equal to the length of the conversion zone, the length of the soaking zone heating tube 132 Equal to the length of the soaking zone.
Dry flue gas outlet 4, dry flue gas import 9, heating cigarette are sequentially provided with along external jacket 6 described in process route direction Gas outlet 12, heating gas approach 15 and insulation exhanst gas outlet 18;The dry flue gas import 9 passes through with the center inner core 11 One connection of connecting tube 10 is arranged;Heat exhanst gas outlet 12 and the heating with described respectively in the two ends of the conversion zone heating tube Gas approach 15 is connected;Heat gas approach 15 and the insulation cigarette with described respectively in the two ends of the soaking zone heating tube 132 Gas outlet 18 is connected;Two flue gas shunting devices are set at the heating gas approach 15, positioned at the inner side of the external jacket 6 16。
In the present embodiment, the flue gas shunting device 16 is herringbone flow distribution plate.In the presence of the flue gas shunting device 16, Heat smoke is divided into three parts after entering from heating gas approach 15, and Part I heat smoke is by positioned at the conversion zone 14 and institute The exhaust gases passes stated between external jacket 6 are moved to the heating exhanst gas outlet 12 positioned at the front end of the conversion zone 14, second Heat smoke is divided to move to the heating exhanst gas outlet 12 positioned at the front end of the conversion zone 14 by the conversion zone heating tube 131 Dynamic, Part III heat smoke is by positioned at the exhaust gases passes and soaking zone heating between the soaking zone 17 and the external jacket 6 Pipe 132 to the insulation exhanst gas outlet 18 positioned at the rear end of the soaking zone 17 is moved, and first, second partial fume is to upgraded coal Pyrolytic reaction provides heat, and Part III flue gas provides heat to upgraded coal insulation, so as to be conducive to improving upgrading pyrolysis of coal effect Rate and product ature of coal amount.
The upgraded coal cooling unit includes that longitudinally disposed cylinder 24 and the edge inside the cylinder 24 are vertical Several cloth tubulations 26 that direction be arranged in parallel, in the present embodiment, the diameter of the cloth tubulation preferably takes DN400;It is described The length of cloth tubulation is 1 with the length ratio of the cylinder:1.The top of the cylinder 24 is provided with upgraded coal cooling unit and enters Material mouth 22, the upgraded coal cooling unit charging aperture 22 connects setting with the feed box discharging opening 21, the cylinder 24 it is upper Portion is provided with hot air outlet 25, and bottom is provided with inlet of cold air 27 and vapor outlet 28, and it is single that bottom is provided with upgraded coal cooling First discharging opening 29.Used as preferred embodiment, the present embodiment is in the inside of the cylinder 24 and positioned at the cloth tubulation 26 Top is provided with material distributor 23, so that material is evenly distributed in each described cloth tubulation 26, is arranged using the cloth The material that cold air outside pipe 26 is pointed in the cloth tubulation 26 is cooled down indirectly.
The humidification discharging unit connect settings with the bottom of the cylinder 24, it is described be humidified discharging unit charging aperture 30 and The upgraded coal cooling unit discharging opening 29 is docked.The humidification discharging unit includes conveying worm 32 and spray thrower 31, institute State spray thrower 31 carries out spray increasing positioned at the top of the conveying worm 32 with the conveying material to the conveying worm 32 Wet process, the upgraded coal finished product after humidification is discharged by the discharging unit discharging opening 33 that is humidified, in humidification process produce vapor and Dust is discharged from the vapor outlet 28 of the upgraded coal cooling unit.
As preferred embodiment, in the present embodiment, with upgraded coal cooling unit connect setting weight induction dress Put, be advantageously implemented the revolution speed of screw of conveying worm 32 described in Automated condtrol, i.e. automatization and adjust the upgraded coal cooling The discharging speed of unit, so that the height of materials in the upgraded coal cooling unit cylinder 24 remains at certain height Degree, realizes the material sealing at the upgraded coal cooling unit discharging opening 29.
Based on the improving quality of coal by pyrolysis integral process of the improving quality of coal by pyrolysis integral system described in the present embodiment, technique stream Journey is as follows:
(1) feed coal is entered after dry thermal cracking unit by the feeding screw, is dried place in dryer section 7 first Reason, heat smoke, by indirectly and directly combined heated mode, the water content of feed coal is down to less than 0.5% to feed coal, While being dried to feed coal, institute is taken away and be blown into trickle coal dust in feed coal with the flue gas of feed coal directly contact Stating ash discharge case 2 carries out unifying to collect, and further ensures that pyrolysis of coal reaction can run steadily in the long term, is prevented effectively from dust and easily causes Equipment pipe is blocked and the big problem of follow-up oil gas product dedusting workload;
Afterwards, adverse current indirectly heat is carried out to moisture-free coal using heat smoke in the conversion zone 14, moisture-free coal is heated to 350~600 DEG C carry out pyrolytic reaction, and reaction generates tar gas, coal gas and upgraded coal, and upgraded coal is entered after soaking zone 17 by hot cigarette Gas cocurrent is heated, and the feed box 20 is entered after held for some time, and the tar gas that pyrolytic reaction is generated and coal gas are derived, obtained To high temperature upgraded coal Jing described in feed box discharging opening 21 be discharged into upgraded coal cooling unit;
(2) high temperature upgraded coal is entered after upgraded coal cooling unit, is assigned to upgraded coal using the material distributor 23 In each cloth tubulation 26, indirect heat exchange is carried out using the cold air outside the cloth tubulation 26 and upgraded coal, upgraded coal is entered Row cools within 200 DEG C, and the upgraded coal after cooling is discharged from the upgraded coal cooling unit discharging opening 29, is obtained after heat exchange The hot-air for obtaining carries out separately being used it for anything else after heat recovery;
(3) upgraded coal after cooling down enters humidification discharging unit, using spray thrower 31 to upgraded coal during discharging Work of water sprinkling for better material moisture is carried out, while further being lowered the temperature to upgraded coal, the upgraded coal is from the row of humidification discharging unit discharging opening 33 When going out, as with certain water content and temperature is 70 DEG C or so of upgraded coal finished product, the vapor that produces in humidification process and Dust is discharged from the vapor outlet 28 of the upgraded coal cooling unit.
Obviously, above-described embodiment is only intended to clearly illustrate example, and not to the restriction of embodiment.For For one skilled in the art, the change or change of other multi-forms can also be made on the basis of the above description It is dynamic.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or change Among moving still in the protection domain of the invention.

Claims (10)

1. a kind of improving quality of coal by pyrolysis integration integrated system, it is characterised in that be at least connected with drying successively along process route Pyrolysis unit, upgraded coal cooling unit and humidification discharging unit;
The dry thermal cracking unit, including horizontally set rotating cylinder and be sheathed on the outer of the rotating cylinder side-wall outer side Chuck, between the rotating cylinder and the external jacket exhaust gases passes are formed;The front end of the rotating cylinder is provided with charging aperture, institute The rear end for stating rotating cylinder is provided with discharging opening;
Include dryer section, conversion zone and soaking zone successively along rotating cylinder described in process route direction, in the dryer section and instead Section boundary is answered to be provided with Liao Feng areas, the Liao Feng areas are provided with center inner core and the spiral being located on the outside of the center inner core, institute Center inner core is stated with the rotating cylinder to be coaxially disposed, vertically the tip height of the center inner core is less than described time Height of materials in rotating cylinder body;The some conversion zones that are axially arranged with the inside of the conversion zone and along the rotating cylinder add Heat pipe, inwall even circumferential distribution and the two ends of the conversion zone heating tube of the conversion zone heating tube along the rotating cylinder It is fixed on the rotating cylinder, in the inside of the soaking zone and along the rotating cylinder some soaking zones is axially arranged with Heating tube, the soaking zone heating tube along the rotating cylinder inwall even circumferential be distributed and the soaking zone heating tube two End is fixed on the rotating cylinder,
Be sequentially provided with along external jacket described in process route direction dry flue gas outlet, dry flue gas import, heating exhanst gas outlet, Heating gas approach and insulation exhanst gas outlet;The dry flue gas import is connected by a connecting tube with the center inner core and set Put;The two ends of the conversion zone heating tube connect respectively with the heating exhanst gas outlet and the heating gas approach;The guarantor The two ends of temperature section heating tube connect respectively with the heating gas approach and the insulation exhanst gas outlet;
The upgraded coal cooling unit, including longitudinally disposed cylinder and positioned at the vertically parallel of the inner barrel Several cloth tubulations for arranging, the top of the cylinder connects setting, the cylinder with the discharging opening of the dry thermal cracking unit The top of body is provided with hot air outlet, and bottom is provided with inlet of cold air and vapor outlet;
The humidification discharging unit, setting is connected with the bottom of the cylinder, and the humidification discharging unit includes conveying worm And spray thrower, the spray thrower be located at the conveying worm top sprayed with the conveying material to the conveying worm Pouring is processed.
2. improving quality of coal by pyrolysis according to claim 1 integration integrated system, it is characterised in that enter in described plus heat smoke Two flue gas shunting devices are set at mouthful, positioned at the inner side of the external jacket, and the flue gas shunting device is herringbone flow distribution plate.
3. improving quality of coal by pyrolysis according to claim 1 and 2 integration integrated system, it is characterised in that with the revolving drum The charging aperture connection of body arranges feeder, and the feeder is elephant trunk or feeding screw.
4. improving quality of coal by pyrolysis according to claim 3 integration integrated system, it is characterised in that with the rotating cylinder Front end connection is provided with ash discharge case, and the bottom of the ash discharge case is provided with ash discharging hole, and the side wall of the ash discharge case is provided with gas outlet;
Connect with the rear end of the rotating cylinder and be provided with feed box, the bottom of the feed box is provided with discharging opening, the feed box Top be provided with air guide port.
5. improving quality of coal by pyrolysis according to claim 4 integration integrated system, it is characterised in that along the rotating cylinder It is central axial, the length of the dryer section, conversion zone and soaking zone account for the percentage ratio of rotating cylinder overall length be followed successively by 40%~ 45%th, 40%~45%, 10%~20%.
6. the integrated integrated system of improving quality of coal by pyrolysis according to claim 1,2,4 or 5, it is characterised in that along described time Drum body it is central axial, the length of the conversion zone heating tube is less than or equal to the reaction segment length, and the soaking zone adds Length of the length of heat pipe less than or equal to the soaking zone.
7. improving quality of coal by pyrolysis according to claim 6 integration integrated system, it is characterised in that vertically, described Height of materials in rotating cylinder is higher by 100~200mm than the bottom of the center inner core.
8. improving quality of coal by pyrolysis according to claim 7 integration integrated system, it is characterised in that in the inner barrel and Material distributor is provided with above the cloth tubulation.
9. the integrated integrated system of improving quality of coal by pyrolysis according to claim 7 or 8, it is characterised in that the cloth tubulation A diameter of DN200~DN400, the length of the cloth tubulation and the length ratio of the cylinder are 0.8:1~1:1.
10. improving quality of coal by pyrolysis according to claim 9 integration integrated system, it is characterised in that cold with the upgraded coal But unit is also connected with arranging weight induction device or material position induction installation.
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CN106753488A (en) * 2016-12-12 2017-05-31 朱书红 Material heater
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