CN208266117U - The device of oil gas is extracted in a kind of fine coal low temperature static pyrolysis - Google Patents
The device of oil gas is extracted in a kind of fine coal low temperature static pyrolysis Download PDFInfo
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- CN208266117U CN208266117U CN201820817193.3U CN201820817193U CN208266117U CN 208266117 U CN208266117 U CN 208266117U CN 201820817193 U CN201820817193 U CN 201820817193U CN 208266117 U CN208266117 U CN 208266117U
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 101
- 239000003245 coal Substances 0.000 title claims abstract description 92
- 230000003068 static effect Effects 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 30
- 239000002918 waste heat Substances 0.000 claims abstract description 14
- 230000035939 shock Effects 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 238000011084 recovery Methods 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004064 recycling Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 16
- 239000011269 tar Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 239000011280 coal tar Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011286 gas tar Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- -1 low Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The device of oil gas is extracted in a kind of fine coal low temperature static pyrolysis, it is pyrolyzed box top and is equipped with preheating coal scuttle, volatile matter discharge pipe, the other end pyrolysis bottom portion opposite with preheating coal scuttle is equipped with semicoke discharge and waste heat recovering mechanism, pyrolysis case inner top is evenly distributed with shock stick, middle part is equipped with auger conveyor, the structure of auger conveyor is to be wound with helical blade in hollow screw, hollow screw one end is connected to the motor by transmission mechanism, and the end end is connected with one end of burner, the other end of burner is connected by pipeline with pyrolysis case, the hollow screw other end is connected by smoke discharge tube with blower, blower and pipeline is connected with the rotary feeder for being equipped with raw coal hopper, rotary feeder is connected by pipeline with cyclone separator, cyclone separator is located at the surface of preheating coal scuttle.The utility model has the advantages that produced tar dust content is low, occupied area is small, safety coefficient is high, effects of energy saving and emission reduction is good.
Description
Technical field
The utility model belongs to petroleum, coal gas and coking industry technical field, and in particular to arrives a kind of fine coal low temperature static
The device and method of oil gas is extracted in pyrolysis.
Background technique
The energy natural endowment feature in China's " more coals, oil starvation, few gas " determines the energy consumption structure based on coal at present,
In addition the price of coal unit calorific value is far below other energy such as oil and natural gas, make coal China consumption proportion always
Higher than 60%, and in future 50 years, coal is still the important foundation energy in China, is difficult to be substituted comprehensively in a short time.So
And to the extensive style of coal using also bringing serious problem of environmental pollution, for example haze formation, acid rain, greenhouse effects with
And soil water pollution.Therefore, coal whether with the energy also or resource uses, the clean efficient process and utilization technology of exploitation
It is the only way of China's energy technology revolution, and optimization China's energy resource structure, the pass for promoting production of energy and consumption revolution
Key link is of great significance for ensureing energy security and administering haze.
Coal Clean efficient technique of rainwater utilization mainly includes pyrolysis, gasification, direct liquefaction and burning etc., and coal is warm in contrast
Solution technology has many advantages such as with low investment, efficient energy conversion is high, three-waste free discharge and process are simple.However, at present more
Mature coal pyrolysis method is all the fixed-bed pyrolysis technique with lump coal raw material, low, oil gas poor quality that there are production efficiencys and
The problems such as pollution.Extensive pulverized coal pyrolysis technology does not industrialize also at present, is still in the development phase, main cause is pulverized coal pyrolysis
Oil gas dust-laden problem not can effectively solve in the process, leads to production process blocking pipeline and is unable to long-term operation.It is pressed from both sides in oil gas
Miscellaneous inertia grit is mainly the minerals in carbon residue, semicoke fine grained and coal, and wherein carbon residue is polycondensation shape between pyrolysis devolatilization object
At substance, content is less；Minerals in semicoke fine grained and coal can be pressed from both sides in pyrolytic process with volatile matter oil-gas component
Take reaction system out of, because its for solids fraction be easy with the heavy composition in volatile matter send out in conjunction with due to deposit in the duct or band
Enter in tar.Therefore, how to control semicoke fine grained and minerals in coal carried secretly in pyrolytic process enter volatile matter in be solution
The certainly key of the faced problem of pulverized coal pyrolysis technology.
The content of semicoke fine grained and minerals in coal has two approach in control pulverized coal pyrolysis tar, and one is to be pyrolyzed
Process control reduces its entrainment, secondly to remove inertia grit from high temperature pyrolysis volatile matter after the reaction.Due to current
Lack effective high-temperature dust removal method, keep the efficiency of dedusting after volatile matter extremely low, the impurity in pyrolysis oil gas cannot be effectively reduced.
Therefore, entering in pyrolysis oil gas in the minerals in pyrolytic reaction process control semicoke fine grained and coal is more feasible plan
Slightly.The pulverized coal pyrolysis technology in stage currently in a research mainly has air flow bed pyrolytic reaction technology, fluidized bed according to reactive mode
Pyrolytic reaction technology, down-flow fluidized bed using ECT solid heat carrier pyrolysis reaction technology, rotary furnace pyrolytic technique and heat accumulating type rotating bed pyrolysis
Technology etc..Relative motion during preceding four kinds of pulverized coal pyrolysis between coal particle is all more strong, causes semicoke fine grained and coal
In minerals be easy to be pyrolyzed volatile matter entrainment and go out；Although heat accumulating type rotating bed pyrolytic technique can ensure that base between coal particle
Relative motion does not occur in this, but its radiant heat transfer mode keeps the thermal efficiency of pyrolysis lower, and production scale is difficult to increase.In addition, place
What it is in development phase is the pyrolytic technique of heat source also because diluting effect becomes the calorific value reduction of combustion gas obtained by pyrolysis, quality using gas
Difference.
Summary of the invention
The technical problem to be solved by the utility model is to overcome existing pulverized coal pyrolysis device, one kind is provided and is set
The dress of oil gas is extracted in the fine coal low temperature static pyrolysis that meter is rationally, work efficiency is high, produced tar dust content is low, pyrolysis gas calorific value is high
It sets.
Solve technical solution used by above-mentioned technical problem are as follows: pyrolysis box top is provided with preheating coal scuttle, volatile matter row
The bottom of outlet pipe, the other end pyrolysis case opposite with preheating coal scuttle is provided with semicoke discharge and waste heat recovering mechanism, is pyrolyzed in case
Top, which is evenly distributed with, hits stick, middle part and is provided with auger conveyor, and the gap of auger conveyor and pyrolysis box inner wall is 5~
10mm, the structure of auger conveyor are that helical blade is wound in hollow screw, and hollow screw one end passes through transmission mechanism and electricity
Machine is connected, and the end end is connected by sealing adaptor head with one end of burner, and the other end of burner passes through pipeline and pyrolysis
Case is connected, and the hollow screw other end is connected by smoke discharge tube with the air inlet of blower, and the air outlet of blower passes through pipe
Road is connected with the rotary feeder for being equipped with raw coal hopper, and rotary feeder is connected by pipeline with the air inlet of cyclone separator
Logical, cyclone separator is located at the surface of preheating coal scuttle.
As a kind of perferred technical scheme, the structure of the pyrolysis case are as follows: trapezoidal box is provided on cylinder side wall, circle
Cylinder is linked together and is connected with trapezoidal box, and cylinder is heat insulation cylinder.
As a kind of perferred technical scheme, the within angle between the trapezoidal box one side wall and cylinder center's line is
30 °~60 °, the within angle between another side wall and cylinder center's line is 50 °~80 °, and the internal diameter of the cylinder is 3~5m.
As a kind of perferred technical scheme, the helical blade is hollow structure, helical blade and hollow screw phase
Connection.
As a kind of perferred technical scheme, the helical blade helical angle is 75 °~85 °, screw pitch is helical blade
1.6~1.2 times of width.
As a kind of perferred technical scheme, the shock stick is distributed in pyrolysis case inner top, the shock stick vertically
Diameter be 10mm, adjacent two to hit the distance between stick be 20~35mm.
As a kind of perferred technical scheme, semicoke discharge and waste heat recovering mechanism are as follows: recovery cylinder is obliquely installed
It is connected in pyrolysis bottom portion and with pyrolysis case, recovery cylinder is linked together by inner barrel and outer barrel constitutes hollow cylinder, inner cylinder and outer
The distance between cylinder is 50~70mm, and recovery cylinder outer cylinder upper end is provided with steam (vapor) outlet, lower end is provided with water inlet, in recovery cylinder
It is provided with equally distributed heat conductive rod, heat conductive rod one end is located between inner barrel and outer barrel, the other end is located in inner cylinder.
As a kind of perferred technical scheme, the angle between the center line of the recovery cylinder and pyrolysis bottom portion is
45 °~70 °.
As a kind of perferred technical scheme, the diameter of the heat conductive rod be 10~20mm, heat conductive rod center line with return
The angle received between cylinder center line is 40 °~55 °, and the length that heat conductive rod protrudes into recovery cylinder hollow cavity is 3~5mm, is located at back
The length for receiving cylinder inner cylinder is 0.5~0.7 times of recovery cylinder internal diameter.
The beneficial effects of the utility model are as follows:
1, of the invention using high-temperature flue gas as heat source pneumatic conveying fine coal to preheating coal scuttle, on the one hand in high-temperature flue gas
Heat is recycled, and systematic heat utilization efficiency is improved, and on the other hand raw coal can be dried pretreatment removing wherein moisture, most
The water content in controllable tar is in reduced levels eventually；
2, the present invention promotes fine coal using auger conveyor, moves fine coal close under stationary state, can effectively reduce
Minerals in semicoke fine grained and coal are mixed into volatile matter, solve the problems, such as tar dust-laden；It is final simultaneously to utilize pyrolysis certainly
The high heating value fuel gas buring that body generates generates the auger conveyor indirect heating fine coal that the hot flue gas of high temperature enters hollow structure, no
Volatile matter is diluted, oil gas product quality is greatly improved, it is ensured that the entire pyrolysis system thermal efficiency with higher.
3, pyrolysis case of the invention is to be provided with trapezoidal box on cylinder side wall, and shock is evenly distributed on trapezoidal box side wall
Stick is used for volatile matter dedusting, can act in inertial impaction after the minerals in semicoke fine grained and coal have just been mixed into volatile matter
Lower removing grit, it is ensured that do not block subsequent pipeline, the dustiness in tar is effectively reduced；
4, semicoke of the invention discharge is used to recycle the sensible heat in semicoke and generate steam with waste heat recovering mechanism, firstly,
It is provided with heat conductive rod on recovery cylinder, the heat exchange efficiency of water in solid state heat semicoke and recovery cylinder hollow cavity can be effectively increased, secondly, adopting
It can avoid quenching sewage with the mode of water and solid state heat semicoke indirect heat exchange to generate, can finally greatly improve entire pyrolysis installation
The thermal efficiency and production the feature of environmental protection.
5, the present invention has the advantages that structure is simple, occupied area is small, safety coefficient is high, effects of energy saving and emission reduction is good, is applicable in
High-quality oil gas is extracted in fine coal low temperature pyrogenation, application prospect is wide.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples, the utility model is not limited to following
Embodiment.
Embodiment 1
In Fig. 1, the pyrolysis of the fine coal low temperature static of the present embodiment extract the device of oil gas by smoke discharge tube 1, blower 2,
Volatile matter discharge pipe 3, raw coal hopper 4, rotary feeder 5, cyclone separator 6, preheating coal scuttle 7, burner 8, gear drive
9, motor 10, pyrolysis case 11, auger conveyor 12, heat conductive rod 13, recovery cylinder 14, shock stick 15 connect and compose.
Pyrolysis case 11 is to be provided with trapezoidal box on cylinder side wall, and cylinder is linked together and is connected with trapezoidal box, and cylinder is
Heat insulation cylinder, internal diameter 4m, the within angle between trapezoidal box right side wall and cylinder center's line are 50 °, left side wall and cylinder center's line
Between within angle be 60 °, cylinder one end of pyrolysis case 11 is equipped with preheating coal scuttle, is equipped with volatile matter discharge at the top of trapezoidal box
Pipe 3, be pyrolyzed it is vertically-mounted in the trapezoidal box inner wall of case 11 have equally distributed shocks stick 15, hit the diameter of stick for 10mm,
Adjacent two hit the distance between stick for 30mm, hit the grit that stick 15 is used to will volatilize in object and separate, and pyrolysis case 11 is another
One end bottom is equipped with semicoke discharge and waste heat recovering mechanism, is pyrolyzed in the cylinder of case 11 and is equipped with auger conveyor 12, spiral
Gap between conveyer 12 and pyrolysis 11 inner wall of case is 8mm, and the structure of auger conveyor 12 is in being wound in hollow screw
The helical blade of hollow structure, helical blade are connected with hollow screw, and helical blade helical angle is 80 °, screw pitch is helical blade
2 times of width, hollow screw right end are pierced by pyrolysis case 11 and are connected by gear drive 9 with motor 10, and motor drives spiral
Conveyer slowly and steadily conveys fine coal to left end, and hollow screw right end end passes through one end phase of sealing adaptor head and burner 8
The other end of connection, burner 8 is connected by pipeline with pyrolysis case 11, and the hollow screw other end passes through smoke discharge tube 1 and wind
The air inlet of machine 2 is connected, and the air outlet of blower 2 is connected by pipeline with rotary feeder 5, installs on rotary feeder 5
There is raw coal hopper 4, rotary feeder 5 is connected by pipeline with the air inlet of cyclone separator 6, and cyclone separator is located at preheating
The surface of coal scuttle 7.
The semicoke of the present embodiment is discharged and waste heat recovering mechanism is connected and composed by heat conductive rod 13 and recovery cylinder 14, recovery cylinder 14
It is tiltedly mounted on pyrolysis 11 bottom of case and is connected with pyrolysis case 11, between the center line and pyrolysis 11 bottom of case of recovery cylinder 14
Angle is 60 °, and recovery cylinder 14 is linked together by inner barrel and outer barrel constitutes hollow cylinder, and the distance between inner cylinder and outer cylinder are
60mm, 14 outer cylinder upper end of recovery cylinder is equipped with steam (vapor) outlet, lower end is equipped with water inlet, there is circulation in the hollow cavity of recovery cylinder 14
Water is equipped with equally distributed heat conductive rod 13 in recovery cylinder 14, and for accelerating heat transfer, the diameter of heat conductive rod 13 is 15mm,
Angle between 14 center line of 13 center line of heat conductive rod and recovery cylinder is 50 °, and 13 one end of heat conductive rod is located in hollow cavity, the other end
In inner cylinder, the length that heat conductive rod protrudes into recovery cylinder hollow cavity be 4mm, positioned at the length of recovery cylinder inner cylinder be in recovery cylinder
0.6 times of diameter.Semicoke discharge of the invention effectively recycles sensible heat entrained by semicoke with waste heat recovering mechanism, is returned using heat exchange
Receiving thermal energy can avoid generating a large amount of waste water, effectively improve the thermal efficiency and the feature of environmental protection of pulverized coal pyrolysis process.
The method that the device of oil gas extracts oil gas is extracted with above-mentioned fine coal low temperature static pyrolysis, is included the following steps:
(1) pulverized coal dewatering preheats
It is introduced from outside into methane and burns the hot flue gas of high temperature for generating 900 DEG C~1000 DEG C at burner 8 full of entire spiral shell
Rotation conveyer 12 is simultaneously discharged by smoke discharge tube 1, and blower 2 is pumped into 300 DEG C~350 DEG C of high-temperature flue gas from smoke discharge tube 1
The fine coal in raw coal hopper 4 is delivered to cyclone separator 6 after compression, cyclone separator 6 is preheated to fine coal drying and dehydrating
150 DEG C~350 DEG C, and preheating coal dust is discharged into preheating coal scuttle 7, complete the preheating of fine coal drying and dehydrating；
(2) fine coal carries out pyrolytic reaction
Pyrolysis case 11 in, motor 2 by gear drive 9 drive auger conveyor 12 rotation will preheating fine coal from
Feed end pushes to semicoke exit, and the pyrolysis gas that pulverized coal pyrolysis generates at the same time is output to burner 8 from pyrolysis case, and replaces
The hot flue gas of high temperature that methyl hydride combustion generates 900 DEG C~1000 DEG C enters mesoporous screw rod from burner 8 and fills to entire flight,
Heat transfer is carried out to mobile fine coal and is warming up to 500 DEG C~600 DEG C so that pyrolysis generation volatile matter occurs；
(3) pyrolysis gas and coal tar are extracted in pyrolysis devolatilization object dedusting
Volatile matter, which moves up to strike, hits stick 15, is mixed in grit in volatile matter and separates and enter pyrolysis case,
The high heating value pyrolysis gas and high-quality coalite tar cooled and isolated is discharged from volatile matter discharge pipe 3；
(4) semicoke discharge is recycled with waste heat
Pyrolysis case is discharged via recovery cylinder in the semicoke formed after pulverized coal pyrolysis, while changing with the water in 14 hollow cavity of recovery cylinder
Heat in recuperation of heat semicoke makes semicoke temperature be reduced to 200 DEG C~250 DEG C discharges.
Embodiment 2
Pyrolysis case 11 is to be provided with trapezoidal box on cylinder side wall, and cylinder is linked together and is connected with trapezoidal box, and cylinder is
Heat insulation cylinder, internal diameter 3m, within angle between trapezoidal box one side wall and cylinder center's line is 30 °, another side wall and cylinder center
Within angle between line is 50 °, and cylinder one end of pyrolysis case 11 is equipped with preheating coal scuttle, trapezoidal box top is equipped with volatile matter row
Outlet pipe 3, be pyrolyzed case 11 trapezoidal box inner wall on it is vertically-mounted have equally distributed shock stick 15, the diameter for hitting stick is
10mm, adjacent two hit the distance between stick for 20mm, hit the grit that stick 15 is used to will volatilize in object and separate, are pyrolyzed case
11 bottom is equipped with semicoke discharge and waste heat recovering mechanism, is pyrolyzed in the cylinder of case 11 and is equipped with auger conveyor 12, spiral
Gap between conveyer 12 and pyrolysis 11 inner wall of case is 5mm, and the structure of auger conveyor 12 is to be wound with spiral shell in hollow screw
Vane piece, helical blade are hollow structure, and helical blade is connected with hollow screw, and helical blade helical angle is 75 °, screw pitch is
1.6 times of helical blade width, hollow screw right end are pierced by pyrolysis case 11 and are connected by gear drive 9 with motor 10, and
The end end is connected by sealing adaptor head with one end of burner 8, and the other end of burner 8 is connected by pipeline with pyrolysis case 11
Logical, the hollow screw other end is connected by smoke discharge tube 1 with the air inlet of blower 2, the air outlet of blower 2 pass through pipeline and
Rotary feeder 5 is connected, and raw coal hopper 4 is equipped on rotary feeder 5, and rotary feeder 5 passes through pipeline and cyclonic separation
The air inlet of device 6 is connected, and cyclone separator is located at the surface of preheating coal scuttle 7.
The semicoke of the present embodiment is discharged and waste heat recovering mechanism is connected and composed by heat conductive rod 13 and recovery cylinder 14, recovery cylinder 14
It is tiltedly mounted on pyrolysis 11 bottom of case and is connected with pyrolysis case 11, between the center line and pyrolysis 11 bottom of case of recovery cylinder 14
Angle is 45 °, and recovery cylinder 14 is linked together by inner barrel and outer barrel constitutes hollow cylinder, and the distance between inner cylinder and outer cylinder are
50mm, 14 outer cylinder upper end of recovery cylinder is equipped with steam (vapor) outlet, lower end is equipped with water inlet, there is circulation in the hollow cavity of recovery cylinder 14
Water, is equipped with equally distributed heat conductive rod 13 in recovery cylinder 14, and the diameter of heat conductive rod 13 is 10mm, 13 center line of heat conductive rod with return
The angle received between 14 center line of cylinder is 40 °, and 13 one end of heat conductive rod is located in hollow cavity, the other end is located in inner cylinder, heat conductive rod
The length protruded into recovery cylinder hollow cavity be 3mm, positioned at the length of recovery cylinder inner cylinder be 0.5 times of recovery cylinder internal diameter.
Embodiment 3
Pyrolysis case 11 is to be provided with trapezoidal box on cylinder side wall, and cylinder is linked together and is connected with trapezoidal box, and cylinder is
Heat insulation cylinder, internal diameter 5m, the within angle between trapezoidal box one side wall and cylinder center's line are 60 °, another side wall and cylinder center
Within angle between line is 80 °, and cylinder one end of pyrolysis case 11 is equipped with preheating coal scuttle, trapezoidal box top is equipped with volatile matter row
Outlet pipe 3, be pyrolyzed case 11 trapezoidal box inner wall on it is vertically-mounted have equally distributed shock stick 15, the diameter for hitting stick is
10mm, adjacent two hit the distance between stick for 35mm, hit the grit that stick 15 is used to will volatilize in object and separate, are pyrolyzed case
11 bottom is equipped with semicoke discharge and waste heat recovering mechanism, is pyrolyzed in the cylinder of case 11 and is equipped with auger conveyor 12, spiral
Gap between conveyer 12 and pyrolysis 11 inner wall of case is 10mm, and the structure of auger conveyor 12 is to be wound with spiral shell in hollow screw
Vane piece, helical blade are hollow structure, and helical blade is connected with hollow screw, and helical blade helical angle is 85 °, screw pitch is
2.4 times of helical blade width, hollow screw right end are pierced by pyrolysis case 11 and are connected by gear drive 9 with motor 10, and
The end end is connected by sealing adaptor head with one end of burner 8, and the other end of burner 8 is connected by pipeline with pyrolysis case 11
Logical, the hollow screw other end is connected by smoke discharge tube 1 with the air inlet of blower 2, the air outlet of blower 2 pass through pipeline and
Rotary feeder 5 is connected, and raw coal hopper 4 is equipped on rotary feeder 5, and rotary feeder 5 passes through pipeline and cyclonic separation
The air inlet of device 6 is connected, and cyclone separator is located at the surface of preheating coal scuttle 7.
The semicoke of the present embodiment is discharged and waste heat recovering mechanism is connected and composed by heat conductive rod 13 and recovery cylinder 14, recovery cylinder 14
It is tiltedly mounted on pyrolysis 11 bottom of case and is connected with pyrolysis case 11, between the center line and pyrolysis 11 bottom of case of recovery cylinder 14
Angle is 70 °, and recovery cylinder 14 is linked together by inner barrel and outer barrel constitutes hollow cylinder, and the distance between inner cylinder and outer cylinder are
70mm, 14 outer cylinder upper end of recovery cylinder is equipped with steam (vapor) outlet, lower end is equipped with water inlet, there is circulation in the hollow cavity of recovery cylinder 14
Water, is equipped with equally distributed heat conductive rod 13 in recovery cylinder 14, and the diameter of heat conductive rod 13 is 20mm, 13 center line of heat conductive rod with return
The angle received between 14 center line of cylinder is 50 °, and 13 one end of heat conductive rod is located in hollow cavity, the other end is located in inner cylinder, heat conductive rod
The length protruded into recovery cylinder hollow cavity be 4mm, positioned at the length of recovery cylinder inner cylinder be 0.7 times of recovery cylinder internal diameter.
Test 1
In order to verify beneficial effects of the present invention, inventor using Yichun jet coal and Shenmu County's high-volatile bituminous coal as raw material,
It is tested on the device of embodiment 1, coal sample property, experimental condition and operating parameter and test result such as table 1, table 2 and table 3
It is shown:
1 coal sample property of table
2 experimental condition of table and operating parameter
3 test result of table
| Coal sample | Fuel gases calorific value | Gas quantity | Tar content | Semicoke amount | It is pyrolyzed water | Tar dust-laden | Tar density | Tar calorific value | The thermal efficiency |
| Yichun coal | 24.7Mj/Nm3 | 11.2kg/h | 14.4kg/h | 70.2kg/h | 1.3kg/h | 0.89% | 0.90g/cm3 | 41.1Mj/kg | 87.2% |
| Shenmu Coal | 26.5Mj/Nm3 | 12.5kg/h | 12.5kg/h | 72.9kg/h | 1.5kg/h | 0.94% | 0.92g/cm3 | 39.0Mj/kg | 85.8% |
High-quality pyrolysis coal gas and tar, and tar dust-laden can be produced using apparatus of the present invention as seen from the experiment
Rate is lower, density is smaller, and the thermal efficiency of entire pyrolysis system is also higher.
Claims (9)
1. the device that oil gas is extracted in a kind of fine coal low temperature static pyrolysis, it is characterised in that: be provided with preheating at the top of pyrolysis case (11)
Coal scuttle (7), volatile matter discharge pipe (3), opposite other end pyrolysis case (11) bottom is provided with semicoke discharge with preheating coal scuttle (7)
With waste heat recovering mechanism, pyrolysis case (11) inner top is evenly distributed with shock stick (15), middle part is provided with auger conveyor (12),
Gap between auger conveyor (12) and pyrolysis case (11) inner wall is 5~10mm, and the structure of auger conveyor (12) is hollow
Be wound with helical blade on screw rod, hollow screw one end is connected by transmission mechanism with motor (10), and the end end pass through it is close
Envelope adapter is connected with one end of burner (8), and the other end of burner (8) is connected by pipeline with pyrolysis case (11), hollow
The screw rod other end is connected by smoke discharge tube (1) with the air inlet of blower (2), the air outlet of blower (2) by pipeline with
Rotary feeder (5) equipped with raw coal hopper (4) is connected, rotary feeder (5) by pipeline and cyclone separator (6) into
Air port is connected, and cyclone separator (6) is located at the surface of preheating coal scuttle (7).
2. the device that oil gas is extracted in fine coal low temperature static pyrolysis according to claim 1, it is characterised in that the pyrolysis
The structure of case (11) are as follows: trapezoidal box is provided on cylinder side wall, cylinder is linked together and is connected with trapezoidal box, and cylinder is heat-insulated
Cylinder.
3. the device that oil gas is extracted in fine coal low temperature static pyrolysis according to claim 2, it is characterised in that: described is trapezoidal
Within angle between case one side wall and cylinder center's line is 30 °~60 °, and the within angle between another side wall and cylinder center's line is
50 °~80 °, the internal diameter of the cylinder is 3~5m.
4. the device that oil gas is extracted in fine coal low temperature static pyrolysis according to claim 1, it is characterised in that: the spiral
Blade is hollow structure, and helical blade is connected with hollow screw.
5. the device that oil gas is extracted in fine coal low temperature static pyrolysis according to claim 4, it is characterised in that: the spiral
Blade screw angle is 75 °~85 °, screw pitch is helical blade width 1.6~2.4 times.
6. the device that oil gas is extracted in fine coal low temperature static pyrolysis according to claim 1, it is characterised in that: the shock
Stick (15) is distributed in pyrolysis case (11) inner top vertically, and the diameter for hitting stick (15) is 10mm, and adjacent two hit stick (15)
The distance between be 20~35mm.
7. the device of oil gas is extracted in described in any item fine coal low temperature static pyrolysis according to claim 1~6, it is characterised in that institute
State semicoke discharge and waste heat recovering mechanism are as follows: recovery cylinder (14) be inclined at pyrolysis case (11) bottom and with pyrolysis case (11)
Be connected, recovery cylinder (14) is linked together by inner barrel and outer barrel constitutes hollow cylinder, the distance between inner cylinder and outer cylinder be 50~
70mm, recovery cylinder (14) outer cylinder upper end is provided with steam (vapor) outlet, lower end is provided with water inlet, is provided in recovery cylinder (14) uniformly
The heat conductive rod (13) of distribution, heat conductive rod (13) one end is located in hollow cavity, the other end is located in inner cylinder.
8. the device that oil gas is extracted in fine coal low temperature static pyrolysis according to claim 7, it is characterised in that: the recycling
Angle between the center line and pyrolysis case (11) bottom of cylinder is 45 °~70 °.
9. the device that oil gas is extracted in fine coal low temperature static pyrolysis according to claim 7, it is characterised in that: described is thermally conductive
The diameter of stick (13) is 10~20mm, the angle between heat conductive rod (13) center line and recovery cylinder (14) center line is 40 °~
55 °, the length that heat conductive rod (13) protrudes into recovery cylinder (14) hollow cavity be 3~5mm, be located at recovery cylinder (14) inner cylinder length be
0.5~0.7 times of recovery cylinder (14) internal diameter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485690A (en) * | 2018-05-29 | 2018-09-04 | 西北大学 | A kind of device and method of fine coal low temperature static pyrolysis extraction oil gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108485690A (en) * | 2018-05-29 | 2018-09-04 | 西北大学 | A kind of device and method of fine coal low temperature static pyrolysis extraction oil gas |
| CN108485690B (en) * | 2018-05-29 | 2024-01-16 | 西北大学 | Device and method for extracting oil gas by pulverized coal low-temperature static pyrolysis |
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