CN108624346A - Coal multistage is classified pyrolysis installation and pyrolytic process - Google Patents
Coal multistage is classified pyrolysis installation and pyrolytic process Download PDFInfo
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- CN108624346A CN108624346A CN201810419464.4A CN201810419464A CN108624346A CN 108624346 A CN108624346 A CN 108624346A CN 201810419464 A CN201810419464 A CN 201810419464A CN 108624346 A CN108624346 A CN 108624346A
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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
- C10B57/02—Multi-step carbonising or coking processes
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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
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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Abstract
The invention discloses a kind of coal multistage classification pyrolysis installations and pyrolytic process, belong to coal chemical technology, which includes destructive distillation first segment, destructive distillation second segment and destructive distillation third section, wherein：Destructive distillation first segment dries raw coal using the heating gas from destructive distillation third section；Destructive distillation second segment and destructive distillation third section use the heating gas of the different temperatures from heating furnace to heat dry coal respectively, respectively obtain tar and alkanes volatile matter；Slag cooler is provided with below destructive distillation third section, slag cooler exchanges heat with heat exchanger, cooling semicoke and heating gas；The outlet of destructive distillation first segment and destructive distillation second segment is sequentially connected gas cleaning system, heat exchanger and heating furnace；Coal gas, which is sent after dedusting, purification are cooling to heating furnace part, to burn, and part heating generates coal gas of high temperature, and the heating gas of different temperatures is provided for destructive distillation second segment and destructive distillation third section.The applicability of pyrolysis feed of the present invention is wide, and high income, the quality of pyrolysis product are excellent, and system thermal efficiency is high.
Description
Technical field
The present invention relates to technical field of coal chemical industry, a kind of coal multistage classification pyrolysis installation and pyrolytic process are particularly related to.
Background technology
In China's primary energy consumption structure, energy utilization patterns based on coal are by long-term existence.Coal in China provides
Source proved reserves are more than 1.4 trillion tons, and the wherein low-order coals such as lignite, jet coal account for about 55% or more, and it is comprehensive how to improve low-order coal
Utility value is closed, realizes the rational utilization of low-order coal, is to realize to be worth research in national energy strategic objective a series of activities
With the core realm of concern, meaning is very great.
Pyrolysis of coal refers to that coal is heated in the absence of air conditions, and a series of object occurs at different temperatures for coal
The complex process of reason variation and chemical reaction, result generate pyrolysis gas (also referred to as coal gas), pyrolysis oil (also referred to as tar or tar),
The products such as solid (semicoke or coke), pyrolysis are the committed steps of coal conversion.
Existing fixed bed and moving bed pyrolysis technique majority is pyrolyzed suitable for lump coal, when coal wholegrain diameter enters stove pyrolysis, bed
Layer gas permeability is very poor；The temperature of pyrolytic process Volatile is more difficult to control, and a tar, which fails to export in time, causes two secondary fissures
Solution causes tar yield relatively low；Most techniques use flue gas heat carrier so that calorific value of gas is relatively low, following process using difficulty compared with
Greatly；Utilize ammonium hydroxide quenching so that semicoke water content is high, and poor quality also will produce more containing phenol, ammonia sewage simultaneously.It cannot achieve coal
The classification sub-prime of resource utilizes.
Invention content
In order to solve the above technical problems, a kind of coal multistage classification pyrolysis installation of present invention offer and pyrolytic process, the present invention
The applicability of pyrolysis feed is wide, and high income, the quality of pyrolysis product are excellent, and system thermal efficiency is high.
It is as follows that the present invention provides technical solution：
A kind of coal multistage classification pyrolysis installation, including：
For using the heating gas with the first temperature that processing is dried to raw coal, dry coal carbonization first segment is obtained；
For using the heating gas with second temperature to heat the dry coal, the destructive distillation second of high-temp solid and tar is obtained
Section；For using the heating gas with third temperature to heat the high-temp solid, devolatilization obtains semicoke and tool
There is the destructive distillation third section of the heating gas of the first temperature；
The destructive distillation first segment, destructive distillation second segment and destructive distillation third section are arranged from top to bottom；Below the destructive distillation third section
It is provided with the slag cooler for cooling down the semicoke；
The destructive distillation second segment is provided with the hot coal for will have the first temperature described in destructive distillation third section generation
Conductance passes to the flue of the destructive distillation first segment, the raw coal and the heating gas countercurrent flow with the first temperature；
The outlet of the destructive distillation first segment and destructive distillation second segment, which is connected with, handles gaseous mixture, isolated cold coal
The gas cleaning system of gas, tar and water, the gaseous mixture includes coal gas and vapor from destructive distillation first segment, and is come from
The coal gas and tar of destructive distillation second segment；
The gas cleaning system is connected with for the semicoke in the cooled coal gas and the slag cooler to exchange heat, and is obtained
To the heat exchanger of the heating gas with the 4th temperature；
The heat exchanger is connected with the burning part heating gas with the 4th temperature, and another part is had the
The heating gas of four temperature heats, and obtains the heating furnace with the heating gas of third temperature；
The heating furnace is connect with the destructive distillation third section, described in being sent into the heating gas with third temperature
Destructive distillation third section；The heating furnace and the heat exchanger are connect with the destructive distillation second segment, for that described will have third temperature
Heating gas with described there is the heating gas of the 4th temperature to be mixed to get the heating gas with second temperature, and described in being sent into
Destructive distillation second segment；
4th temperature described in first temperature ＞ described in second temperature ＞ described in the third temperature ＞.
Further, first temperature is 500-600 DEG C, and the second temperature is 600-700 DEG C, the third temperature
It it is 800-900 DEG C, the 4th temperature is 100-200 DEG C.
Further, the raw coal is heated to 130-170 DEG C in the destructive distillation first segment, and the dry coal is in the destructive distillation
Second segment is heated to 450-600 DEG C, and the high-temp solid is heated to 650-750 DEG C in the destructive distillation third section, and described half
Coke is cooled to 100 DEG C or less in the slag cooler.
Further, wind turbine is provided on the pipeline between the gas cleaning system and the heat exchanger and for will be rich
What waste cold coal gas was sent outside sends pipeline outside.
Further, it is exchanged heat by circulating heat conduction oil between the heat exchanger and the slag cooler.
Further, it is provided with furnace roof coal bunker above the destructive distillation first segment.
Further, the gas cleaning system includes that dust removing units, clean unit, cooling unit and tar recycling are single
Member.
A kind of coal multistage classification pyrolytic process, including：
Raw coal is delivered to furnace roof coal bunker, the raw coal enters destructive distillation first segment by its own gravity；
It is changed with raw coal adverse current using 500-600 DEG C of the heating gas from destructive distillation third section in the destructive distillation first segment
Heat removes the moisture of the raw coal, and the dry coal obtained after dry enters destructive distillation second segment, the coal gas after heat exchange and dry generation
Vapor enters gas cleaning system；
The dry coal is heated using 600-700 DEG C of the heating gas from heating furnace in the destructive distillation second segment, is precipitated burnt
The high-temp solid obtained after oil enters destructive distillation third section, and the tar of heating gas and precipitation enters the gas cleaning system；
The high temperature is heated in the destructive distillation third section using 800-900 DEG C of the heating gas from the heating furnace to consolidate
Body, the semicoke obtained after devolatilization enter slag cooler, and the alkanes gas that devolatilization generates passes through institute with heating gas
The flue for stating destructive distillation second segment enters the destructive distillation first segment drying raw coal；
In the gas cleaning system to coal gas and vapor from the destructive distillation first segment, the destructive distillation second is come from
The alkanes gas and heating gas of section are dusted, purify, cooling down and tar recycling, tar, water and the cooled coal gas detached；
Use circulating heat conduction medium by the semicoke in the cooled coal gas and the slag cooler in the heat exchanger in heat exchanger
It exchanges heat, the cooled coal gas is heated to 100-200 DEG C, the semicoke is cooled to less than 100 DEG C；
A part of 100-200 DEG C of heating gas is passed through heating furnace burning, 100-200 DEG C of heating gas of another part is existed
800-900 DEG C is heated in heating furnace；
A part of 800-900 DEG C of heating gas is passed through the destructive distillation third section, heats the high-temp solid；By another portion
Divide 800-900 DEG C of heating gas to be mixed with 100-200 DEG C of the heating gas from the heat exchanger, obtains 600-700 DEG C of heat
Coal gas, and 600-700 DEG C of heating gas is passed through the destructive distillation second segment, heat the dry coal.
Further, the raw coal is heated to 130-170 DEG C in the destructive distillation first segment, and the dry coal is in the destructive distillation
Second segment is heated to 450-600 DEG C, and the high-temp solid is heated to 650-750 DEG C in the destructive distillation third section.
Further, cooled coal gas more than needed is sent outside on the pipeline between the gas cleaning system and the heat exchanger,
The circulating heat conduction medium is circulating heat conduction oil.
The invention has the advantages that：
The pyrolysis oven of the coal multistage classification pyrolysis installation of the present invention includes destructive distillation first segment, destructive distillation second segment and destructive distillation third
Section, using multi-stage oven, bed good permeability enters stove pyrolysis suitable for low-order coal wholegrain diameter；And the present invention utilizes different temperatures
Heating gas as heat carrier be classified be pyrolyzed, be conducive to improve tar yield；The present invention selects coal gas as heat carrier, provides richness
The pyrolysis atmosphere of hydrogen further increases tar yield, while producing high heating value gas；Using heat exchanger and slag cooler cooling half
Coke avoids, inferior problem high using semicoke water content caused by ammonium hydroxide quenching, while the medium after heat exchange is for heating
Circulating gas and burning coal gas, realize the recycling of semicoke heat, effective lifting system thermal efficiency；Utilize destructive distillation third section heat
The raw coal of the waste-heat destructive distillation first segment of coal gas, realizes efficiently using for energy.
In conclusion the applicability of pyrolysis feed of the present invention is wide, the yield of pyrolysis product (tar, coal gas and semicoke etc.)
Height, quality are excellent, and system thermal efficiency is high.
Description of the drawings
Fig. 1 is that the coal multistage of the present invention is classified pyrolysis installation schematic diagram.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
On the one hand, the present invention provides a kind of coal multistage classification pyrolysis installation, as shown in Figure 1, including pyrolysis oven, the pyrolysis
Stove includes：
For using the heating gas with the first temperature that processing is dried to raw coal, dry coal carbonization first segment 1 is obtained；
For using the heating gas with second temperature to heat dry coal, the destructive distillation second segment 2 of high-temp solid and tar is obtained；With
High-temp solid is heated in using the heating gas with third temperature, devolatilization, obtains semicoke and with the first temperature
The destructive distillation third section 3 of the heating gas of degree.
Destructive distillation first segment 1, destructive distillation second segment 2 and destructive distillation third section 3 are arranged from top to bottom；The 3 lower section setting of destructive distillation third section
It is useful for the slag cooler 4 of cooling semicoke.
Destructive distillation second segment 2 be provided with the heating gas with the first temperature for generating destructive distillation third section 3 be conducted to it is dry
Evaporate the flue of first segment 1, raw coal and the heating gas countercurrent flow with the first temperature；
The outlet of destructive distillation first segment 1 and destructive distillation second segment 2, which is connected with, handles gaseous mixture, isolated cooled coal gas,
The gas cleaning system 6 of tar and water, gaseous mixture includes coal gas and vapor from destructive distillation first segment 1, and comes from destructive distillation
The coal gas and tar of second segment 2.
Gas cleaning system 6 is connected with for the semicoke in cooled coal gas and slag cooler 4 to exchange heat, and obtains having the 4th
The heat exchanger 7 of the heating gas of temperature.
Heat exchanger 7, which is connected with a burning part, has the heating gas (burning coal gas) of the 4th temperature, and another part is had
There is the heating gas (circulating gas) of the 4th temperature to heat, obtains the heating furnace 8 with the heating gas of third temperature.
Heating furnace 8 is connect with destructive distillation third section 3, for the heating gas with third temperature to be sent into destructive distillation third section 3；Add
Hot stove 5 and heat exchanger 7 are connect with destructive distillation second segment 2, are used for the heating gas with third temperature and the heat with the 4th temperature
Coal gas is mixed to get the heating gas with second temperature, and is sent into destructive distillation second segment 2.
The 4th temperature of third temperature ＞ second temperatures the first temperature of ＞ ＞.
The pyrolysis oven of the coal multistage classification pyrolysis installation of the present invention includes destructive distillation first segment, destructive distillation second segment and destructive distillation third
Section, using multi-stage oven, bed good permeability enters stove pyrolysis suitable for low-order coal wholegrain diameter；And the present invention utilizes different temperatures
Heating gas as heat carrier be classified be pyrolyzed, be conducive to improve tar yield；The present invention selects coal gas as heat carrier, provides richness
The pyrolysis atmosphere of hydrogen further increases tar yield, while producing high heating value gas；Using heat exchanger and slag cooler cooling half
Coke avoids, inferior problem high using semicoke water content caused by ammonium hydroxide quenching, while the medium after heat exchange is for heating
Circulating gas and burning coal gas, realize the recycling of semicoke heat, effective lifting system thermal efficiency；Utilize destructive distillation third section heat
The raw coal of the waste-heat destructive distillation first segment of coal gas, realizes efficiently using for energy.
In conclusion the applicability of pyrolysis feed of the present invention is wide, the yield of pyrolysis product (tar, coal gas and semicoke etc.)
Height, quality are excellent, and system thermal efficiency is high.
Preferably, the first temperature is 500-600 DEG C, and second temperature is 600-700 DEG C, and third temperature is 800-900 DEG C, the
Four temperature are 100-200 DEG C；Raw coal is heated to 130-170 DEG C in destructive distillation first segment 1, and drying effect is good；Dry coal is in destructive distillation
It is heated to 450-600 DEG C for two section 2, most of tar is precipitated；High-temp solid is heated to 650-750 DEG C in destructive distillation third section 3,
The most volatile matters of removing, complete pyrolysis；Semicoke is cooled to 100 DEG C or less in slag cooler 4.
As an improvement of the present invention, 9 He of wind turbine is provided on the pipeline between gas cleaning system 6 and heat exchanger 7
Pipeline 10 is sent outside for send cooled coal gas more than needed outside.
Further, it is exchanged heat by circulating heat conduction oil between heat exchanger 7 and slag cooler 4.It is real as cooling medium using oil
Existing Dry Quenching, recycles semicoke heat while promoting semicoke quality, system thermal efficiency is high.
For convenience of into raw coal, 1 top of destructive distillation first segment is provided with furnace roof coal bunker 11.
Gas cleaning system 6 preferably includes dust removing units, clean unit, cooling unit and tar recovery unit.
On the other hand, the present invention provides a kind of coal multistage classification pyrolytic process, including：
Raw coal is delivered to furnace roof coal bunker 6, preferably by belt-conveying, raw coal enters destructive distillation first segment by its own gravity
1。
In destructive distillation first segment 1 using 500-600 DEG C of heating gas and raw coal countercurrent flow from destructive distillation third section 3, take off
Except the moisture of raw coal, the dry coal obtained after the dry most moisture of removing continues traveling downwardly, into destructive distillation second segment 2, after heat exchange
Coal gas together with the vapor generated in drying process from destructive distillation first segment export be discharged, into gas cleaning system 6.
Dry coal is heated using 600-700 DEG C of the heating gas from heating furnace 8 in destructive distillation second segment 2, is precipitated most of burnt
The high-temp solid obtained after oil continues traveling downwardly, and into destructive distillation third section 3, destructive distillation second is discharged in heating gas together with the tar of precipitation
Section, into gas cleaning system 6, it is preferred that exhaust passage, heating gas and tar and destructive distillation first segment are provided in pyrolysis furnace
Coal gas and vapor mixing after, be discharged to gas cleaning system from outlet together.
High-temp solid is heated using 800-900 DEG C of the heating gas from heating furnace 8 in destructive distillation third section 3, removing is big absolutely
The high warm semicoke obtained after the volatile matter of part enters slag cooler 4, and the alkanes gas that devolatilization generates is logical with heating gas
The flue 5 for crossing destructive distillation second segment 2 enters 1 drying raw coal of destructive distillation first segment.
In gas cleaning system 6 to coal gas and vapor from destructive distillation first segment 1, the alkane from destructive distillation second segment 2
Class gas and heating gas are dusted, purify, cooling down and tar recycling, tar, water and the cooled coal gas detached.
The semicoke in the cooled coal gas and slag cooler 4 in heat exchanger 7 is changed using circulating heat conduction medium in heat exchanger 7
Cooled coal gas is heated to 100-200 DEG C by heat, and the coal gas (100~200 DEG C) after heat exchange is sent to heating furnace, is respectively used to burn
And cycle.It is sent to coke bin after semicoke is cooled to less than 100 DEG C.
A part of 100-200 DEG C of heating gas (burning coal gas) is passed through heating furnace 8 to burn, by another part 100-200
DEG C heating gas (circulating gas) be heated to 800-900 DEG C in heating furnace 8.
A part of 800-900 DEG C of heating gas is passed through destructive distillation third section 3, heats high-temp solid；By another part 800-
900 DEG C of heating gas is mixed with 100-200 DEG C of the heating gas from heat exchanger 7, obtains 600-700 DEG C of heating gas, and will
600-700 DEG C of heating gas is passed through destructive distillation second segment 2, heats dry coal.
It includes destructive distillation first segment, destructive distillation second segment and destructive distillation third section that the coal multistage classification pyrolytic process of the present invention, which uses,
Multi-stage oven, bed good permeability enter stove pyrolysis suitable for low-order coal wholegrain diameter；And the present invention utilizes the heating gas of different temperatures
It is classified and is pyrolyzed as heat carrier, be conducive to improve tar yield；The present invention selects coal gas as heat carrier, provides the pyrolysis of hydrogen-rich
Atmosphere further increases tar yield, while producing high heating value gas；Semicoke is cooled down using heat exchanger and slag cooler, is avoided
High, the inferior problem using semicoke water content caused by ammonium hydroxide quenching, while the medium after heat exchange is used for heat cycles coal gas
With burning coal gas, the recycling of semicoke heat, effective lifting system thermal efficiency are realized；More than destructive distillation third section heating gas
The raw coal of heat heating destructive distillation first segment, realizes efficiently using for energy.
In conclusion the applicability of pyrolysis feed of the present invention is wide, the yield of pyrolysis product (tar, coal gas and semicoke etc.)
Height, quality are excellent, and system thermal efficiency is high.
Further, raw coal is heated to 130-170 DEG C in destructive distillation first segment, and dry coal is heated in destructive distillation second segment
450-600 DEG C, high-temp solid is heated to 650-750 DEG C in destructive distillation third section.
Preferably, cooled coal gas more than needed is sent outside on the pipeline between gas cleaning system 6 and heat exchanger 7, circulating heat conduction
Medium is circulating heat conduction oil.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of coal multistage is classified pyrolysis installation, which is characterized in that including：
For using the heating gas with the first temperature that processing is dried to raw coal, dry coal carbonization first segment is obtained；For
The dry coal is heated using the heating gas with second temperature, obtains the destructive distillation second segment of high-temp solid and tar；With
The high-temp solid is heated in using with the heating gas of third temperature, devolatilization, obtains semicoke and with the
The destructive distillation third section of the heating gas of one temperature；
The destructive distillation first segment, destructive distillation second segment and destructive distillation third section are arranged from top to bottom；Setting below the destructive distillation third section
It is useful for cooling down the slag cooler of the semicoke；
The destructive distillation second segment is provided with the hot coal conductance for will have the first temperature described in destructive distillation third section generation
Pass to the flue of the destructive distillation first segment, the raw coal and the heating gas countercurrent flow with the first temperature；
The outlet of the destructive distillation first segment and destructive distillation second segment, which is connected with, handles gaseous mixture, isolated cooled coal gas, coke
The gas cleaning system of oil and water, the gaseous mixture includes coal gas and vapor from destructive distillation first segment, and comes from destructive distillation
The coal gas and tar of second segment；
The gas cleaning system is connected with for the semicoke in the cooled coal gas and the slag cooler to exchange heat, and is had
There is the heat exchanger of the heating gas of the 4th temperature；
The heat exchanger is connected with the burning part heating gas with the 4th temperature, and another part is had the 4th temperature
The heating gas of degree heats, and obtains the heating furnace with the heating gas of third temperature；
The heating furnace is connect with the destructive distillation third section, for the heating gas with third temperature to be sent into the destructive distillation
Third section；The heating furnace and the heat exchanger are connect with the destructive distillation second segment, are used for the heat with third temperature
Coal gas with described there is the heating gas of the 4th temperature to be mixed to get the heating gas with second temperature, and be sent into the destructive distillation
Second segment；
4th temperature described in first temperature ＞ described in second temperature ＞ described in the third temperature ＞.
2. coal multistage according to claim 1 is classified pyrolysis installation, which is characterized in that first temperature is 500-600
DEG C, the second temperature is 600-700 DEG C, and the third temperature is 800-900 DEG C, and the 4th temperature is 100-200 DEG C.
3. coal multistage according to claim 2 is classified pyrolysis installation, which is characterized in that the raw coal is in the destructive distillation first
Section is heated to 130-170 DEG C, and the dry coal is heated to 450-600 DEG C in the destructive distillation second segment, and the high-temp solid exists
The destructive distillation third section is heated to 650-750 DEG C, and the semicoke is cooled to 100 DEG C or less in the slag cooler.
4. being classified pyrolysis installation according to any coal multistages of claim 1-3, which is characterized in that the gas cleaning system
It is provided with wind turbine on pipeline between the heat exchanger and sends pipeline outside for send cooled coal gas more than needed outside.
5. coal multistage according to claim 4 is classified pyrolysis installation, which is characterized in that the heat exchanger and the slag cooler
Between exchanged heat by circulating heat conduction oil.
6. coal multistage according to claim 5 is classified pyrolysis installation, which is characterized in that setting above the destructive distillation first segment
There is furnace roof coal bunker.
7. coal multistage according to claim 4 is classified pyrolysis installation, which is characterized in that the gas cleaning system includes removing
Dirt unit, clean unit, cooling unit and tar recovery unit.
8. a kind of coal multistage is classified pyrolytic process, which is characterized in that including：
Raw coal is delivered to furnace roof coal bunker, the raw coal enters destructive distillation first segment by its own gravity；
500-600 DEG C of heating gas and the raw coal countercurrent flow from destructive distillation third section are used in the destructive distillation first segment,
The moisture of the raw coal is removed, the dry coal obtained after dry enters destructive distillation second segment, the coal gas after heat exchange and the dry water generated
Steam enters gas cleaning system；
The dry coal is heated using 600-700 DEG C of the heating gas from heating furnace in the destructive distillation second segment, after tar is precipitated
Obtained high-temp solid enters destructive distillation third section, and the tar of heating gas and precipitation enters the gas cleaning system；
The high-temp solid is heated using 800-900 DEG C of the heating gas from the heating furnace in the destructive distillation third section, is taken off
Except the semicoke obtained after volatile matter enters slag cooler, the alkanes gas that devolatilization generates passes through the destructive distillation with heating gas
The flue of second segment enters the destructive distillation first segment and dries the raw coal；
In the gas cleaning system to coal gas and vapor from the destructive distillation first segment, from the destructive distillation second segment
Alkanes gas and heating gas are dusted, purify, cooling down and tar recycling, tar, water and the cooled coal gas detached；
The semicoke in the cooled coal gas and the slag cooler in the heat exchanger is carried out using circulating heat conduction medium in heat exchanger
Heat exchange, is heated to 100-200 DEG C by the cooled coal gas, the semicoke is cooled to less than 100 DEG C；
A part of 100-200 DEG C of heating gas is passed through heating furnace burning, 100-200 DEG C of heating gas of another part is being heated
800-900 DEG C is heated in stove；
A part of 800-900 DEG C of heating gas is passed through the destructive distillation third section, heats the high-temp solid；By another part
800-900 DEG C of heating gas is mixed with 100-200 DEG C of the heating gas from the heat exchanger, obtains 600-700 DEG C of hot coal
Gas, and 600-700 DEG C of heating gas is passed through the destructive distillation second segment, heat the dry coal.
9. coal multistage according to claim 8 is classified pyrolytic process, which is characterized in that the raw coal is in the destructive distillation first
Section is heated to 130-170 DEG C, and the dry coal is heated to 450-600 DEG C in the destructive distillation second segment, and the high-temp solid exists
The destructive distillation third section is heated to 650-750 DEG C.
10. coal multistage according to claim 8 or claim 9 is classified pyrolytic process, which is characterized in that in the gas cleaning system
Cooled coal gas more than needed is sent outside on pipeline between the heat exchanger, the circulating heat conduction medium is circulating heat conduction oil.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111718737A (en) * | 2020-06-29 | 2020-09-29 | 中国科学院过程工程研究所 | Process method and system device for preparing high-quality oil gas by pyrolyzing low-caking coal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111718737A (en) * | 2020-06-29 | 2020-09-29 | 中国科学院过程工程研究所 | Process method and system device for preparing high-quality oil gas by pyrolyzing low-caking coal |
| CN111718737B (en) * | 2020-06-29 | 2021-07-09 | 中国科学院过程工程研究所 | Process method and system device for preparing high-quality oil gas by pyrolyzing low-caking coal |
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