CN104726118A - Low-rank pulverized coal pyrolysis and semicoke gasification composite process system - Google Patents
Low-rank pulverized coal pyrolysis and semicoke gasification composite process system Download PDFInfo
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- CN104726118A CN104726118A CN201510158191.9A CN201510158191A CN104726118A CN 104726118 A CN104726118 A CN 104726118A CN 201510158191 A CN201510158191 A CN 201510158191A CN 104726118 A CN104726118 A CN 104726118A
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- pyrolysis
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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
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/64—Processes with decomposition of the distillation products
- C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/86—Other features combined with waste-heat boilers
-
- 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
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
- C10J2300/0936—Coal fines for producing producer gas
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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
-
- 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
Abstract
The invention provides a low-rank pulverized coal pyrolysis and semicoke gasification composite process system. A vertical preheater is connected with a feeding screw; the feeding screw is connected with a pyrolysis kiln; one branch of the pyrolysis kiln is connected with the preheater, while the other branch of the pyrolysis kiln is connected with a hot-blast heating furnace; the hot-blast heating furnace is connected with the pyrolysis kiln; the pyrolysis kiln is connected with a settling box; the settling box is connected with a high-temperature filter device; the pyrolysis kiln is connected with a semicoke gasifier; the semicoke gasifier is connected with a cyclone separator; the cyclone separator is connected with a waste heat boiler; the cyclone separator is connected with the semicoke gasifier; the waste heat boiler is connected with a steam pocket by use of a pipe; the low-rank pulverized coal is preheated to the range of 200-300 DEG C by use of a preheater, and then heated in a multi-tube heating rotary pyrolysis kiln to be pyrolyzed; and the pyrolysis gas goes into a subsequent filtering and cooling treatment device. The low-rank pulverized coal pyrolysis and semicoke gasification composite process system is capable of realizing integrated treatment of pulverized coal pyrolysis and direct semicoke gasification, and meanwhile, effectively and directly preparing a fuel gas or raw gas by use of thermal-state semicoke; the waste heat of the semicoke is utilized efficiently and a complex and low-efficiency semicoke waste heat recovery process is omitted.
Description
Technical field
The invention belongs to technical field of coal chemical industry, particularly a kind of low order pulverized coal pyrolysis and char Gasification recombining process system.
Background technology
The low temperature pyrogenation of coal realizes the technological approaches that low-rank coal comprehensive high-efficiency utilizes economical rationality the most, can be obtained the semicoke of pyrolysis gas, tar and high heating value by pyrolysis.To output is comparatively large in the market, the low order fine coal of not easily direct marketing again, adopt low temperature pyrogenation method, fully realize its economic worth, meaning is larger.
But current existing low-temperature pyrolysis of coal system, be also mostly limited to the small-scale production process system that only can process lump coal, environmental protection and economic performance are all poor.Some low temperature pyrogenation devices of fine coal can be processed, as external-heat multistage rotary kiln and solid heat carrier pyrolysis technique etc., also can not realize mass-producing because exist, problems such as process system imperfection and easily blocking and cannot promoting.In addition, said apparatus also all lacks efficient semicoke treatment system, and the high-temperature semi-coke of generation needs cooling, is used further to produce pulverized coal injection in blast furnace or for generating.Although semicoke waste heat takes recovery measure, organic efficiency is low, and energy wastage is serious.
Inquire about existing low-rank coal pyrolytic process patent, also have the rotary type pyrolytic process system can carrying out pulverized coal pyrolysis, but all belong to the process system not configuring external placed type preheater and fluidized bed semicoke direct gasification.
Summary of the invention
In order to overcome the deficiency of above-mentioned existing pyrolytic process technology, the object of the present invention is to provide a kind of low order pulverized coal pyrolysis and char Gasification recombining process system, for enormous amount in the market and reluctant low order fine coal, the present invention can realize pulverized coal pyrolysis and semicoke direct gasification is close-coupled processing, pyrolysis gas can be provided, effectively utilize the direct Fuel gas of hot semicoke or unstripped gas simultaneously, make use of the waste heat of semicoke more efficiently, eliminate the semicoke waste heat recovery process of numerous and diverse poor efficiency.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of low order pulverized coal pyrolysis and char Gasification recombining process system, comprise vertical preheater 1, the discharge gate of vertical preheater 1 is connected with pan feeding spiral 2 import, and pan feeding spiral 2 outlet is connected with the helicoid pyrolysis kiln 3 of Multi-tube heating.The exhaust outlet of pyrolysis kiln 3 is divided into two-way, and a road is connected with the blast inlet of preheater 1, and a road is connected with the blast inlet of air heating stove 4, and the air outlet of air heating stove 4 is connected with the blast inlet of pyrolysis kiln 3; The pyrolysis gas outlet of pyrolysis kiln 3 is connected with sludge box 5 entrance, and sludge box 5 outlet is connected with high temperature filtration device 6 entrance; The semicoke outlet of pyrolysis kiln 3 is connected with char Gasification stove 7 opening for feed, the outlet of char Gasification stove 7 upper gas is connected with cyclonic separator 8 entrance, the upper outlet of cyclonic separator 8 is connected with waste heat boiler 9, the bottom powder outlet of cyclonic separator 8 is connected with char Gasification stove 7 lower mouth, and waste heat boiler 9 is connected by downtake and upcast with drum 10.
Described vertical preheater 1 adopts septate heat transfer.
Described pyrolysis kiln 3 is Multi-tube heating rotary type, and rotating cylinder inside is provided with many group heating tubes and is bearing on two supporting support rollers, makes it turn round rotation by transmission system; Feed end and the discharge end of rotating cylinder have difference of altitude.
Described high temperature filtration device 6 adopts chimney filter structure.
Described vapourizing furnace 7 adopts fluidization principle of work, and hot small-particle semicoke, without the need to fragmentation, directly enters vapourizing furnace, and under the effect of vaporized chemical, realize gasification, vaporized chemical is air-steam, or adopts oxygen.
Described waste heat boiler 9 is vertical structure, adopts partition tubular type heat transfer tube and natural water circulation principle of work, and water coolant is by entering in heat transfer tube bottom waste heat boiler, and by the outer gas converting heat flowed of tube wall and pipe, the steam of generation enters drum.
Described vertical preheater 1,3 pyrolysis kiln, high temperature filtration device 6, vapourizing furnace 7, waste heat boiler 9 and connecting pipeline all adopt insulation construction, and lagging material is the material that pure aluminium silicate or performance are similar.
Native system and existing similar system compare, and the invention has the beneficial effects as follows:
A, pyrolysis installation are formed by preheater and pyrolysis kiln series combination, and System's composition is simple, and process structure is reasonable.Method for pyrolysis have employed indirect heating type Multi-tube heating wind circulation pyrolysis principle, and the gas active constituent content of generation is high, and economic worth is large.
B, novel process are applicable to large-scale production, separate unit year processing power can reach 1,000,000 tons, be suitable for carrying out the pyrolysis of mass-producing and integrated gasification combined processing line construction, flow process is compact, good economy performance.
C, high-temperature semi-coke directly gasify, and take full advantage of semicoke waste heat, avoid the thermosteresis in conventional semicoke waste heat recovery process, improve the thermo-efficiency of process system, also achieve the high-efficiency comprehensive utilization of semicoke.
D, novel process system be realize coal, oil, gas, change multi-production process create condition.
Accompanying drawing explanation
Accompanying drawing is structure flow chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
A kind of low order pulverized coal pyrolysis and char Gasification recombining process system, comprise vertical preheater 1, pan feeding spiral 2, pyrolysis kiln 3, air heating stove 4, sludge box 5, high temperature filtration device 6, char Gasification stove 7, cyclonic separator 8, waste heat boiler 9 and drum 10;
The discharge gate of vertical preheater 1 is connected with pan feeding spiral 2 import, and pan feeding spiral 2 outlet is connected with the helicoid pyrolysis kiln 3 of Multi-tube heating.The exhaust outlet of pyrolysis kiln 3 is divided into two-way, and a road is connected with the blast inlet of preheater 1, and a road is connected with the blast inlet of air heating stove 4, and the air outlet of air heating stove 4 is connected with the blast inlet of pyrolysis kiln 3; The pyrolysis gas outlet of pyrolysis kiln 3 is connected with sludge box 5 entrance, and sludge box 5 outlet is connected with high temperature filtration device 6 entrance; The semicoke outlet of pyrolysis kiln 3 is connected with char Gasification stove 7 opening for feed, the outlet of char Gasification stove 7 upper gas is connected with cyclonic separator 8 entrance, the upper outlet of cyclonic separator 8 is connected with waste heat boiler 9, the bottom powder outlet of cyclonic separator 8 is connected with char Gasification stove 7 lower mouth, and waste heat boiler 9 is connected by downtake and upcast with drum 10.
Described vertical preheater 1 adopts septate heat transfer, and during work, fine coal enters via housing upper, and hot blast is then entered by inlet pipe, is conducted by partition, and thermal medium is with in the heat transfer process of fine coal, and temperature constantly declines, and fine coal temperature then constantly raises.
Described pyrolysis kiln 3 is Multi-tube heating rotary type, and rotating cylinder inside is provided with many group heating tubes and is bearing on two supporting support rollers, makes it turn round rotation by transmission system; Feed end and the discharge end of rotating cylinder have difference of altitude, move to realize stream in cylindrical shell.
Described high temperature filtration device 6 adopts chimney filter structure, and dusty gas outer enter through chimney filter surface in pipe by managing and to realize filtering, and tube wall sinks the dust collected and regularly removed by pulse jet gas.
Described vapourizing furnace 7 adopts fluidization principle of work, and hot small-particle semicoke, without the need to fragmentation, directly enters vapourizing furnace, and under the effect of vaporized chemical, realize gasification, vaporized chemical is air-steam, or adopts oxygen.
Described waste heat boiler 9 is vertical structure, adopts partition tubular type heat transfer tube and natural water circulation principle of work, and water coolant is by entering in heat transfer tube bottom waste heat boiler, and by the outer gas converting heat flowed of tube wall and pipe, the steam of generation enters drum.
Described vertical preheater 1,3 pyrolysis kiln, high temperature filtration device 6, vapourizing furnace 7, waste heat boiler 9 and connecting pipeline all adopt insulation construction, and lagging material is the material that pure aluminium silicate or performance are similar.
Workflow step of the present invention is as follows:
During work, particle diameter is less than the fine coal of 10mm, sends into preheater 1 top, flow through the gap between multiple thin-walled heat exchanging chamber from top to bottom by feeding system.The hot blast being cooled to about 300 ~ 400 DEG C through mixed wind from pyrolysis kiln 3 tail end is then entered by inlet pipe, by inlet pipe by hot blast uniformly distributing to each heat exchanging chamber, fine coal is from top to bottom in moving process and heat exchanging chamber exterior surface, conducted by partition, fine coal temperature is increased to 200 ~ 300 DEG C gradually, and then realizes dehydration and heat up.The water vapor removed rises gradually and is discharged by top.Hot blast is with in the heat transfer process of fine coal, and temperature constantly declines, and finally reaches about 100 DEG C, under the effect of rear portion exhaust blower, discharges via vapor pipe.
Fine coal after preheating is entered in pyrolysis kiln 3 cylindrical shell by scroll feeder 2, and in the rotary course of cylindrical shell, the inclination by cylindrical shell realizes by the movement of feeding end to discharge end.The temperature provided by hotblast stove 4 system is that the hot blast of 700 ~ 800 DEG C evenly enters in many groups heating tube of inner barrel, and in the process flowed to the other end, conducted and radiation by tube wall, pyrolysis kiln 3 cylindrical shell will be entered, and the fine coal be positioned at outside heating tube is heated to 400 ~ 550 DEG C further, realize the pyrolysis of fine coal with this.
Via the hot blast of many group heating tubes, to be conducted by tube wall and radiation makes the outer fine coal intensification pyrolysis of pipe, self be cooled to after about 500 ~ 600 DEG C and discharged by the feed end of pyrolysis kiln 3.Part hot blast enters vertical partition fine coal preheater 1, for preheating fine coal after mixed wind cooling.Rest part hot blast is then got back to hotblast stove 4 through recirculation blower and is entered hot air circulating system.
The hot semicoke formed after pulverized coal pyrolysis directly enters fluidized bed semicoke vapourizing furnace 7 and gasifies.The semicoke entering vapourizing furnace forms fluidized under the effect by the air entered bottom vapourizing furnace and steam, and at high temperature realize gasification, the gas produced enters cyclonic separator 8 by vapourizing furnace top, and isolated semicoke particle returns in vapourizing furnace and continues gasification.Enter waste heat boiler 9 after divided gas flow to be discharged by bottom after waste heat recovery cooling, the steam produced in the process converges in drum 10, and can be used as the vaporized chemical of vapourizing furnace.
The pyrolysis gas that pulverized coal pyrolysis produces enters sludge box 5, first make macrobead sedimentation, reduce gas dust content, and then enter filter tube type high temperature filtration device 6, dusty gas in the outer flowing of pipe, and to enter through chimney filter surface in pipe and to realize filtering, and tube wall sinks the dust layer that collects by the nitrogen being heated to be not less than 200 DEG C, control through pulse blowing valve, periodic reverse winding-up is removed.
Claims (6)
1. a low order pulverized coal pyrolysis and char Gasification recombining process system, it is characterized in that, comprise vertical preheater (1), the discharge gate of vertical preheater (1) is connected with pan feeding spiral (2) import, pan feeding spiral (2) outlet is connected with the helicoid pyrolysis kiln (3) of Multi-tube heating, the exhaust outlet of pyrolysis kiln (3) is divided into two-way, one tunnel is connected with the blast inlet of preheater (1), one tunnel is connected with the blast inlet of air heating stove (4), and the air outlet of air heating stove (4) is connected with the blast inlet of pyrolysis kiln (3); The pyrolysis gas outlet of pyrolysis kiln (3) is connected with sludge box (5) entrance, and sludge box (5) outlet is connected with high temperature filtration device (6) entrance; The semicoke outlet of pyrolysis kiln (3) is connected with char Gasification stove (7) opening for feed, the outlet of char Gasification stove (7) upper gas is connected with cyclonic separator (8) entrance, the upper outlet of cyclonic separator (8) is connected with waste heat boiler (9), the bottom powder outlet of cyclonic separator (8) is connected with char Gasification stove (7) lower mouth, and waste heat boiler (9) is connected by downtake and upcast with drum (10).
2. low order pulverized coal pyrolysis and a char Gasification recombining process system, is characterized in that, described vertical preheater (1) adopts septate heat transfer.
3. a low order pulverized coal pyrolysis and char Gasification recombining process system, it is characterized in that, described pyrolysis kiln (3) is Multi-tube heating rotary type, and rotating cylinder inside is provided with many group heating tubes and is bearing on two supporting support rollers, makes it turn round rotation by transmission system; Feed end and the discharge end of rotating cylinder have difference of altitude.
4. low order pulverized coal pyrolysis and a char Gasification recombining process system, is characterized in that, described high temperature filtration device (6) adopts chimney filter structure.
5. low order pulverized coal pyrolysis and a char Gasification recombining process system, is characterized in that, described waste heat boiler (9) is vertical structure.
6. a low order pulverized coal pyrolysis and char Gasification recombining process system, it is characterized in that, described vertical preheater (1), pyrolysis kiln (3), high temperature filtration device (6), vapourizing furnace (7), waste heat boiler (9) and connecting pipeline all adopt insulation construction, and the material of insulation construction comprises pure aluminium silicate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510158191.9A CN104726118A (en) | 2015-04-03 | 2015-04-03 | Low-rank pulverized coal pyrolysis and semicoke gasification composite process system |
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| CN201510158191.9A CN104726118A (en) | 2015-04-03 | 2015-04-03 | Low-rank pulverized coal pyrolysis and semicoke gasification composite process system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087078A (en) * | 2015-09-08 | 2015-11-25 | 航天长征化学工程股份有限公司 | Indirect pyrolysis system and pyrolysis method thereof |
| CN105400532A (en) * | 2015-12-04 | 2016-03-16 | 中国重型机械研究院股份公司 | Poly-generation system and method with coal pyrolysis as guide |
| CN109652130A (en) * | 2018-11-30 | 2019-04-19 | 浙江天禄环境科技有限公司 | A kind of method and system preparing synthesis gas using coal substance in low-order coal |
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| CN204689941U (en) * | 2015-04-03 | 2015-10-07 | 中国重型机械研究院股份公司 | A kind of low order pulverized coal pyrolysis and char Gasification recombining process device |
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2015
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Patent Citations (5)
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| FI20030241A (en) * | 2003-02-17 | 2004-08-18 | Fortum Oyj | A method for producing a synthesis gas |
| CN202297531U (en) * | 2011-10-25 | 2012-07-04 | 陕西华祥能源科技集团有限公司 | Moving bed pulverized coal pyrolysis and fluidized bed coke breeze gasification coupling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087078A (en) * | 2015-09-08 | 2015-11-25 | 航天长征化学工程股份有限公司 | Indirect pyrolysis system and pyrolysis method thereof |
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| CN109652130A (en) * | 2018-11-30 | 2019-04-19 | 浙江天禄环境科技有限公司 | A kind of method and system preparing synthesis gas using coal substance in low-order coal |
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Application publication date: 20150624 |