CN104593026B - A kind of scale low order fine coal low temperature pyrogenation device and method - Google Patents
A kind of scale low order fine coal low temperature pyrogenation device and method Download PDFInfo
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- CN104593026B CN104593026B CN201510044034.5A CN201510044034A CN104593026B CN 104593026 B CN104593026 B CN 104593026B CN 201510044034 A CN201510044034 A CN 201510044034A CN 104593026 B CN104593026 B CN 104593026B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/18—Modifying the properties of the distillation gases in the oven
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/024—Dust removal by filtration
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/046—Reducing the tar content
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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
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of scale low order fine coal low temperature pyrogenation device and method, the discharge gate of the vertical preheater is connected with pan feeding spiral, the pan feeding spiral is connected with pyrolysis kiln, the pyrolysis gas outlet for being pyrolyzed kiln is connected with sedimentation fishing box, the sedimentation fishing box is connected with high temperature filtration device, the semicoke outlet of the pyrolysis kiln is connected with semicoke cooling residual heat retracting device, the steam (vapor) outlet of semicoke cooling residual heat retracting device is connected with drum, the air outlet of air heating stove is connected with the air inlet of pyrolysis kiln, the exhaust outlet for being pyrolyzed kiln is connected with the air inlet of vertical preheater and the air inlet of air heating stove respectively.The apparatus system is constituted simply, and process structure rationally, is suitable for carrying out the pyrolysis and deep processing and production line construction of scale, and economy and the feature of environmental protection are preferable.
Description
Technical field
The invention belongs to technical field of coal chemical industry, specially a kind of scale low order fine coal low temperature pyrogenation device and method.
Background technology
The low temperature pyrogenation of coal is the technological approaches for realizing low-order coal comprehensive high-efficiency using economical rationality the most, can by pyrolysis
Obtain the semicoke of coal gas, tar and high heating value.
But it is limited to the small-scale production process system for being only capable of processing lump coal, ring more than existing low-temperature pyrolysis of coal device
Protect and economic performance is poor.The other types of low temperature pyrogenation device of fine coal can be processed, such as external-heat multistage rotary furnace and solid
Body heat carrier pyrolytic process etc., also because presence can not realize scale, process system imperfection and nothing the problems such as easily blocking
Method is promoted.The imperfect semicoke cooling of said apparatus and residual neat recovering system.High temperature pyrolysis gas containing tar gas, without
Cross particulate matter filtering and directly cool down recovery tar, impurity content is more in causing tar, and quality is substantially reduced, be also not easy into
One step deep processing.
In existing pulverized coal pyrolysis method, also there is similar Multi-tube heating swinging pyrolysis kiln, but belong to not external
The process system of formula preheater, majority pyrolysis kiln complex structures, kiln body bulky dimensions cause that system cost is high, fault rate is also high.
Moreover existing process system is also not equipped with complete pyrolysis gas high temperature filtration and semicoke cooling and waste-heat recovery device.
The content of the invention
It is an object of the invention to provide a kind of scale low order fine coal low temperature pyrogenation device and method, to solve the above-mentioned back of the body
The problem proposed in scape technology.
To achieve the above object, the present invention provides following technical scheme：
A kind of scale low order fine coal low temperature pyrogenation device, including vertical preheater, pan feeding spiral, pyrolysis kiln, hot blast are supplied
Hot stove, sedimentation connecting box, high temperature filtration device, semicoke cooling residual heat retracting device and drum, the discharge of the vertical preheater
Mouth is connected with pan feeding spiral, and the pan feeding spiral is connected with pyrolysis kiln, and the pyrolysis gas outlet for being pyrolyzed kiln is connected with sedimentation fishing box,
The sedimentation fishing box is connected with high temperature filtration device, and the semicoke outlet of the pyrolysis kiln connects with semicoke cooling residual heat retracting device
Connect, the steam (vapor) outlet of semicoke cooling residual heat retracting device is connected with drum, the air intake of the air outlet of air heating stove and pyrolysis kiln
Mouth connection, the exhaust outlet for being pyrolyzed kiln is connected with the air inlet of vertical preheater and the air inlet of air heating stove respectively.
Used as further scheme of the invention, vertical preheater is mainly by air inlet pipe, thin-walled heat exchanging chamber, blast pipe and shell
Body is constituted.
Used as further scheme of the invention, the pyrolysis kiln is that Multi-tube heating swinging is pyrolyzed kiln, mainly by revolving drum
Body, heating tube, riding wheel apparatus, transmission system and gas directing system composition.
Used as further scheme of the invention, the semicoke cooling at least includes level comb formula semicoke with waste-heat recovery device
Cold bed, level comb formula semicoke cold bed is made up of grate conveying assembly, rolling support unit and hydraulic propelling system.
Used as further scheme of the invention, the high temperature filtration device is pyrolysis gas twin-stage high temperature filtration device, is used
Compact structure, has two-step purification to constitute, and the first order uses cyclone cylinder centrifugation, and the second level is filtered for high temperature chimney filter, can mistake
The dust size of filter is to micron order.
As further scheme of the invention, the rectangular cross-section of the thin-walled heat exchanging chamber.
As further scheme of the invention, the method for operation that grate conveying assembly is grouped and retreats using together advancing, respectively
It is combination sealing between conveying assembly.
A kind of method of scale low order fine coal low temperature pyrogenation, comprises the following steps：
(1) fine coal to be pyrolyzed first passes through vertical preheater and is preheated to 200~300 DEG C；
(2) fine coal after preheating is pyrolyzed through pan feeding spiral feeding pyrolysis kiln, is heated to 400~550 DEG C, generates high-temperature semi-coke
And pyrolysis gas；
(3) pyrolysis gas for carrying out self-pyrolysis kiln first pass through sedimentation connecting box and are settled big particle, then imported into high temperature
Filter removes remaining particulate matter, further cools down, separated burnt oil and gas, and collection treatment respectively；It is raw after pyrolysis
Into high-temperature semi-coke again through semicoke cooling residual heat retracting device be cooled to less than 120 DEG C by level comb formula semicoke cold bed discharge, change
The steam generated after heat is discharged by drum, is recycled for production line, that is, complete low order fine coal low temperature pyrogenation.
The fine coal to be pyrolyzed is fine coal of the particle diameter less than 20mm.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) device is formed by vertical preheater and pyrolysis kiln tandem compound, and system is constituted simply, and process structure is reasonable,
Method for pyrolysis employs indirect heating type Multi-tube heating wind circulation pyrolysis principle, and the gas active constituent content of generation is high, heating
Value is big, is easy to further application and deep processing.
(2) new technology is applicable to large-scale production, and up to 1,000,000 tons, even more high is suitable for separate unit year disposal ability
The pyrolysis and deep processing and production line construction of scale are carried out, economy and the feature of environmental protection are preferable.
(3) pyrolysis gas are purified using high temperature air filtration device, greatly reduces solid particulate matter in gas
Content, effectively increases the degree of purity of gas, is easy to further cooling and tar separation.The structure of close-coupled causes whole dress
Put middle pyrolysis gas flow most short, temperature drop is minimum, is easy to prevent process system coking and blocking.
(4) high-temperature semi-coke uses horizontal grate CDQ, has not only effectively reclaimed waste heat, also greatly reduces conventional wet
To the consumption and environmental pollution of water resource in method quenching operation.Horizontal cold bed also help reduce whole process system installation it is high
Degree, reduces civil engineering expense.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
In figure：1st, vertical preheater, 2, pan feeding spiral, 3, pyrolysis kiln, 4, hot-blast stove, 5, sedimentation connecting box, 6, high temperature mistake
Filter device, 7, semicoke cooling residual heat retracting device, 8, drum.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is further elaborated.
As shown in figure 1, a kind of scale low order fine coal low temperature pyrogenation device, including vertical preheater 1, pan feeding spiral 2, heat
Solution kiln 3, air heating stove 4, sedimentation connecting box 5, high temperature filtration device 6, semicoke cooling residual heat retracting device 7 and drum 8, it is described
The discharge gate of vertical preheater 1 is connected with pan feeding spiral 2, and the pan feeding spiral 2 is connected with pyrolysis kiln 3, is pyrolyzed the pyrolysis gas of kiln 3
Outlet is connected with sedimentation fishing box 5, and the sedimentation fishing box 5 is connected with high temperature filtration device 6, and the semicoke of the pyrolysis kiln 3 goes out
Mouth is connected with semicoke cooling residual heat retracting device 7, and the steam (vapor) outlet of semicoke cooling residual heat retracting device 7 is connected with drum 8, hot blast
The air outlet of heating stove 4 with pyrolysis kiln 3 air inlet be connected, pyrolysis kiln 3 exhaust outlet respectively with the air inlet of vertical preheater 1
And the air inlet connection of air heating stove 4.Vertical preheater 1 is main by air inlet pipe, thin-walled heat exchanging chamber, blast pipe and shell body group
Into.Pyrolysis kiln 3 is that Multi-tube heating swinging is pyrolyzed kiln, mainly by rotating cylinder, heating tube, riding wheel apparatus, transmission system and is led
Gas system is constituted.Semicoke cool down with waste-heat recovery device 7 at least include level comb formula semicoke cold bed, level comb formula semicoke cold bed by
Grate conveying assembly, rolling support unit and hydraulic propelling system composition.High temperature filtration device 6 is pyrolysis gas twin-stage high temperature filtration
Device, using compact structure, has two-step purification to constitute, and the first order uses cyclone cylinder centrifugation, and the second level is high temperature chimney filter
Filtering, the dust size that may filter that to micron order.The rectangular cross-section of thin-walled heat exchanging chamber.Grate conveying assembly is used and together advanced
Be grouped between the method for operation for retreating, each conveying assembly is combination sealing.
Using above-mentioned scale low order fine coal low temperature pyrogenation device, the method and step of fine coal low temperature pyrogenation includes：(1) heat is treated
Solution fine coal, the particle diameter of fine coal is less than 20mm, first passes through vertical preheater 1 and is preheated to 200~300 DEG C；
(2) fine coal after preheating is pyrolyzed through the feeding pyrolysis kiln 3 of pan feeding spiral 2, is heated to 400~550 DEG C, generation high temperature half
Burnt and pyrolysis gas；
(3) pyrolysis gas for carrying out self-pyrolysis kiln first pass through sedimentation connecting box 5 and are settled big particle, then imported into high temperature
Filter 6 removes remaining particulate matter, further cools down, separated burnt oil and gas, and collection treatment respectively；It is raw after pyrolysis
Into high-temperature semi-coke, then through semicoke cooling residual heat retracting device 7 be cooled to less than 120 DEG C by level comb formula semicoke cold bed discharge,
The steam generated after heat exchange is discharged by drum 8, is recycled for production line, that is, complete low order fine coal low temperature pyrogenation.
The operation principle of scale low order fine coal low temperature pyrogenation device：When system works, fine coal of the particle diameter less than 20mm, by
Feeding system feeding vertical preheater 1 top, flows through the gap between multiple thin-walled heat exchanging chambers from top to bottom.Carry out self-pyrolysis kiln 3
The hot blast that the mixed wind of the warp of tail end is cooled to 300~400 DEG C or so is then entered by air inlet pipe, is evenly distributed hot blast by air inlet pipe
To each heat exchanging chamber, fine coal in motion process and heat exchanging chamber outer surface contact from top to bottom is conducted by partition, fine coal temperature by
Edge up up to 200~300 DEG C, and then realize dehydration and heat up.The water vapour of removing is gradually increasing and is discharged by top.Hot blast exists
In the heat transfer process of fine coal, temperature constantly declines, and is finally reached about 100 DEG C, in the presence of the exhaust blower of rear portion, via row
Tracheae is discharged.
Fine coal after preheating is entered in the pyrolysis cylinder of kiln 3 by pan feeding spiral 2, and in the rotary course of cylinder, by
Cylinder inclination realize from movement from feeding end to discharge end.The temperature provided by the system of hot-blast stove 4 is 700~800 DEG C of heat
Wind is conducted and spoke even into the multigroup heating tube to inner barrel, and during being flowed to the other end by tube wall
Penetrate, will be into the pyrolysis cylinder of kiln 3, and fine coal outside heating tube is further heated to 400~550 DEG C, and fine coal is realized with this
Pyrolysis.
The pyrolysis gas of discharge end temperature to 500 DEG C or so first pass through sedimentation connecting box 5 and are settled big particle, then lead
Enter the high temperature filtration device 6 to rear end, into the pyrolysis gas of first order cavity, under the action of the centrifugal force, more than more than 10 microns
Coarse granule be separated during gas rotating, and discharged by bottom ash discharging hole.By coarse filtration gas again via
Blast pipe enters the bottom of second level cavity, in upward motion process, by one group of fixation screen pipe on the supporting plate, greatly
In more than 1 micron of particle by screen pipe intercept in outer tube surface, purified gas via screen pipe inside, finally by upper
The gas vent discharge in portion.The anti-blowpipe on cavity top is arranged in, under the control of blowback air system, periodically in pipe
Surface is blown into the hot nitrogen of certain pressure.In the presence of blowback strength, the particulate matter for being deposited on outer tube surface comes off downwards
And discharged by ash discharging hole.
Via the hot blast of multigroup heating tube, conducted by tube wall and radiation makes the outer fine coal intensification pyrolysis of pipe, itself is cooled to
Discharged by the feed end of pyrolysis kiln 3 after 500~600 DEG C or so.Part hot blast enters vertical preheater 1 after lowering the temperature through mixed wind, uses
In preheating fine coal.Remainder hot blast then returns to hot-blast stove 4 and enters hot air circulating system through circulating fan.
The semicoke formed after pulverized coal pyrolysis enters semicoke cooling residual heat retracting device 7.Completely enclosed semicoke cooling residual heat
On retracting device 7 many heat exchanger tubes are disposed with along stream direction.During work, in the presence of hydraulic cylinder, level comb formula semicoke is cold
Semicoke particle on bed is in stepwise alternated forward movement, and cooling water then predicts stream direction in Bottomhole pressure, semicoke particle and cold
But medium realizes heat exchange by tube wall.Medium temperature is stepped up, and semicoke temperature is gradually reduced.Semicoke after cooling, in water
Flat comb formula semicoke cold bed other end discharge, the steam generated after heat exchange is discharged by drum 8, recycled for production line.
Above example is merely to illustrate the present invention, and not limitation of the present invention, about the common skill of technical field
Art personnel, without departing from the spirit and scope of the present invention, can also make a variety of changes and modification, therefore all etc.
Same technical scheme falls within scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (6)
1. a kind of scale low order fine coal low temperature pyrogenation device, it is characterised in that including vertical preheater, pan feeding spiral, pyrolysis
Kiln, air heating stove, sedimentation connecting box, high temperature filtration device, semicoke cooling residual heat retracting device and drum, the vertical preheating
The discharge gate of device is connected with pan feeding spiral, and the pan feeding spiral is connected with pyrolysis kiln, and the pyrolysis gas outlet and sedimentation for being pyrolyzed kiln join
Case connection is connect, the sedimentation fishing box is connected with high temperature filtration device, and the semicoke of the pyrolysis kiln is exported and semicoke cooling residual heat
Retracting device is connected, and the steam (vapor) outlet of semicoke cooling residual heat retracting device is connected with drum, air outlet and the heat of air heating stove
The air inlet connection of kiln is solved, the exhaust outlet for being pyrolyzed kiln connects with the air inlet of vertical preheater and the air inlet of air heating stove respectively
Connect, vertical preheater is mainly made up of air inlet pipe, thin-walled heat exchanging chamber, blast pipe and shell body, the pyrolysis kiln is Multi-tube heating
Swinging is pyrolyzed kiln, is mainly made up of rotating cylinder, heating tube, riding wheel apparatus, transmission system and gas directing system, and the semicoke is cold
But level comb formula semicoke cold bed is at least included with waste-heat recovery device, level comb formula semicoke cold bed is by grate conveying assembly, rolling
Support unit and hydraulic propelling system are constituted.
2. a kind of scale low order fine coal low temperature pyrogenation device as claimed in claim 1, it is characterised in that the high temperature filtration
Device be the bipolar high temperature filtration device of pyrolysis gas, using compact structure, there is two-step purification to constitute, the first order using cyclone cylinder from
The heart is separated, and the second level is filtered for high temperature chimney filter, the dust size that may filter that to micron order.
3. a kind of scale low order fine coal low temperature pyrogenation device as claimed in claim 1, it is characterised in that the thin-walled heat exchange
The rectangular cross-section in chamber.
4. a kind of scale low order fine coal low temperature pyrogenation device as claimed in claim 1, it is characterised in that grate conveying assembly
It is combination sealing between the method for operation retreated using packet of together advancing, each conveying assembly.
5. a kind of method of scale low order fine coal low temperature pyrogenation, it is characterised in that comprise the following steps：
(1) fine coal to be pyrolyzed first passes through vertical preheater and is preheated to 200~300 DEG C；
(2) fine coal after preheating is pyrolyzed through pan feeding spiral feeding pyrolysis kiln, is heated to 400~550 DEG C, generates high-temperature semi-coke and heat
Solution gas；
(3) pyrolysis gas for carrying out self-pyrolysis kiln first pass through sedimentation connecting box and are settled big particle, then imported into high temperature filtration
Device removes remaining particulate matter, further cools down, separated burnt oil and gas, and collection treatment respectively；Generated after pyrolysis
High-temperature semi-coke is cooled to less than the 120 DEG C discharges by level comb formula semicoke cold bed through semicoke cooling residual heat retracting device again, heat exchange
The steam for generating afterwards is discharged by drum, is recycled for production line, that is, complete low order fine coal low temperature pyrogenation.
6. a kind of method of scale low order fine coal low temperature pyrogenation as claimed in claim 5, it is characterised in that described to wait to be pyrolyzed
Fine coal is fine coal of the particle diameter less than 20mm.
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| CN104910939A (en) * | 2015-05-24 | 2015-09-16 | 三门峡化工机械有限公司 | Internal heat rotary kiln coal dry distillation device |
| CN105910448B (en) * | 2016-06-03 | 2018-06-12 | 中国重型机械研究院股份公司 | A kind of combined type little particle semicoke cooling and waste-heat recovery device |
| CN106350085A (en) * | 2016-09-09 | 2017-01-25 | 新疆广汇中化能源技术开发有限公司 | Dry distillation apparatus |
| CN106642041B (en) * | 2017-01-16 | 2018-08-28 | 西安三瑞实业有限公司 | One kind is for energy ladder recovery method and device in pyrolysis technique |
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| CN103224814A (en) * | 2013-04-10 | 2013-07-31 | 山西鑫立能源科技有限公司 | Method for active coke regeneration through hot exhaust gas obtained by purification and combustion of coke oven raw gas in coal gangue pyrolysis gasification |
| CN204417407U (en) * | 2015-01-28 | 2015-06-24 | 中国重型机械研究院股份公司 | A kind of mass-producing low order fine coal low temperature pyrogenation device |
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| DE10027200A1 (en) * | 1999-05-25 | 2001-11-29 | Ver Energiewerke Ag | Process for the thermal disposal of high-calorific fractions from sorted waste and / or residues in fossil-fired power plants, especially lignite-fired power plants with wet flue gas desulfurization |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103224814A (en) * | 2013-04-10 | 2013-07-31 | 山西鑫立能源科技有限公司 | Method for active coke regeneration through hot exhaust gas obtained by purification and combustion of coke oven raw gas in coal gangue pyrolysis gasification |
| CN204417407U (en) * | 2015-01-28 | 2015-06-24 | 中国重型机械研究院股份公司 | A kind of mass-producing low order fine coal low temperature pyrogenation device |
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