CN105273785A - Method and apparatus for producing natural gas through combination of smashed coal pressurized gasification and dry-process entrained-bed gasification - Google Patents
Method and apparatus for producing natural gas through combination of smashed coal pressurized gasification and dry-process entrained-bed gasification Download PDFInfo
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Abstract
The invention provides a method and apparatus for producing natural gas through combination of smashed coal pressurized gasification and dry-process entrained-bed gasification. Smashed coal pressurized gasification and dry-process entrained-bed gasification technologies are organically combined, low-heat raw gas generated by a smashed-coal gasification furnace is utilized to chill a high-heat coal gas generated by a dry-process entrained-bed gasification furnace, tar, phenols and other substances in raw gas are gasified and are converted into raw-gas compositions. The wastewater processing problem of the smashed-coal pressurized gasification technology is essentially solved, also disposition of residual pulverized coal in the smashed-coal pressurized gasification technology is solved. Under the premise of not increasing the investment, the coal-made natural gas output is improved, wastewater investment and running cost are reduced, and the method is an optimized technological route for coal-made natural gas.
Description
Technical field
The invention belongs to coal preparing natural gas technical field.Particularly, the present invention relates to method and device that a kind of crushed coal pressure gasifying associating dry method entrained flow gasification produces Sweet natural gas.
Background technology
The feature of Chinese Resources is " rich coal, oil starvation, weak breath ".Economy-zone is huge to Natural Gas Demand greatly for Circum-Bohai Sea, the Yangtze River Delta, Pearl River Delta three, and the ground such as the Inner Mongol, Xinjiang rich coal resources, but transportation cost is high.Therefore, the coal resources in rich coal area are changed into Sweet natural gas on the spot, the another grand strategy become after coal generating, coal liquifaction, olefin hydrocarbon making by coal is selected.
Gasification of coal occupies critical role on coal process for producing natural route.Gasification essence is the reaction that coal gas produced by coal and vaporized chemical, is thermo-negative reaction generally, needs burning part of coal to provide heat energy for completing coal gasification course.Different vapourizing furnace, vapor pressure, temperature, to enter coal particle size requirement also different.The core technology of gasification system is vapourizing furnace, usually vapourizing furnace is divided into three types: moving-bed (fixed bed), fluidized-bed, air flow bed.Run maximum industrialized units mainly wet entrained flow bed pressurized gasification technology, dry method air flow bed pressurized gasification technology and crushed coal pressure gasifying technology at home and abroad at present.
(1) crushed coal pressure gasifying technique
Crushed coal pressure gasifying technology belongs to moving-bed gasification technology.Raw coal size is 5-50mm, with water vapour and pure oxygen for vaporized chemical, at temperature 900-1100 DEG C, in the vapourizing furnace of pressure 2.7-4.1MPa, produces raw gas, vapourizing furnace temperature out not coexisting between 225-600 DEG C with coal.System after raw gas enters enter waste heat boiler heat exchange to 180 DEG C after scrubber cooler wash cooling to 210 DEG C after.Because of CH in the raw gas of production
4content accounts for 15% in synthetic natural gas, and widely uses at coal preparing natural gas.Gasification temperature is not high, and there is destructive distillation layer, when gasification low-rank coal, can obtain the multiple byproducts such as the tar of various value, lightweight oil and crude phenols.Shortcoming is that steam resolution ratio is low, and gasification waste water is many, and contain aldehydes matter in waste water, intractability is large simultaneously.Because of wastewater treatment difficulty, general follow-up sewage disposal has gas liquor separating technology and phenol ammonia reclaiming process.Existing wastewater treatment process flow is long, and cost for wastewater treatment is high, deficiency in economic performance, and one-time investment is larger.
(2) entrained flow gasification technique
Entrained flow bed gasification technology divides dry method air flow bed and wet entrained flow bed process.During 2005-2010 years, China has introduced multiple dry method entrained flow gasification in succession, and institute's production of synthetic gas is mainly used in producing synthetic ammonia, methyl alcohol, alkene, synthesis wet goods product.Typical dry method air flow bed technology has the shell stove of the K-T stove of German Koppers Co. Inc. (US) 1450 Koppers Building, Pittsburgh, PA15219, U.S.A., Dutch Shell International Petroleum Company, the CCG bed pulverized coal gasification technology of German Ke Lin company, the GSP gasification technology of fuel gasification limited technical company of Siemens, the powdered coal pressuring gasified technique of space flight HT-L, Huaneng Group group clean energy technology graduate double-section dry coal powder pressure gasifying technology etc. of No.1 Inst., China Space Science & Technology Group Corp..Adopt with dry pulverized coal charging, pure oxygen cooks vaporized chemical, slag tap; Gasification flame kernel temperature is different between 1600-2200 DEG C with coal, and discharged producer gas temperature is about 1400-1700 DEG C.The thin ash that the coal gas of high temperature produced is carried secretly still has certain cohesiveness, so need a part of circulating cooling coal gas to carry out Quench, make molten slag solidify and unlikelyly be bonded on syngas cooler wall, its coal gas is cooled to about 900 DEG C at importing waste heat boiler, in generation, presses through hot steam.Air flow bed is high-temperature gasification, and raw material granularity is very little, and it is extremely abundant that reaction is carried out, and the by product affecting environment is few, and in gas product, dustiness is lower than 2mg/m
3.Processing wastewater can realize qualified discharge by simple process, is easy to purifying treatment and recycles.
Entrained flow bed gasification technology has coal and adapts to the features such as comparatively wide, energy utilization rate is high, FU gas deliverability is high, environmental benefit is good.Shortcoming is that, vapourizing furnace technique higher to kinds of coals for gasification requirement interlocking is many, component loops cooling coal gas carries out cold shock coal gas and causes thermo-efficiency low, and energy consumption waste is serious.
(3) coal process for producing natural
The coal preparing natural gas technological process of production is sketched: feed coal carries out reacting obtained raw gas with high purity oxygen gas and middle pressure steam in coal gasification apparatus; Raw gas, after resistant to sulfur oil resistant conversion cooling and low temperature washing device for methanol desulfurization and decarburization, makes required purified gas; Purified gas enters methanation device synthesizing methane, produces the Sweet natural gas of high-quality; Produce rich hydrogen sulfide containing sour gas from refining plant and deliver to Sulfur Recovery Unit and ammonia desulfuration equipment processes, produce sulphur; A large amount of containing phenol, ammonia, H by producing in broken coal gasification
2the detrimental impurity such as S, after the pre-treatment of phenol ammonia recovery unit, materializing strategy, biochemical treatment, advanced treatment and part film process, waste water is recycled.
The prevailing technology of current domestic production Sweet natural gas is crushed coal pressure gasifying technology, and the mainstream gas metallization processes of producing synthetic gas is dry method entrained flow bed gasification technology.But existing technique often to there is technological line long, production run cost is higher; Downstream process is complicated, and added value of product is low, the shortcoming of market competitiveness weakness.
Although it is country's 12 Planning emphasis chemical projects that the five large Modern Coal-based Chemicals such as coal liquifaction, olefin hydrocarbon making by coal, coal preparing natural gas have been classified as, it is again the emphasis of national energy security strategy simultaneously.But for the selection of operational path in evolution, especially the type selecting aspect of vapourizing furnace is the focus of expert, the debate within the scholars always, main dispute is in the selection of crushed coal pressurized-gasification furnace and airflow bed gasification furnace.Adopt which kind of type of furnace science, reasonable, economic, more effectively realize the emphasis of energy-saving and emission-reduction Shi Ge scientific research institutions research.
Summary of the invention
For process characteristic and the existing problems of said flow bed and moving-bed two kinds of gasification technologies, on producing, how to make good use of the advantage of two kinds of type of furnaces, overcome its shortcoming is technical barrier in field always.The present invention creatively adopts crushed coal pressure gasifying and dry method entrained flow gasification joint process, the coal gas of high temperature mixing that the cooled coal gas produced with crushed coal pressurized-gasification furnace produces as the gentle fluidized bed of cold shock gas, the long-chain Substance Transformations such as the tar class, fatty acid and the petroleum hydrocarbon that are produced by broken coal vapourizing furnace are micromolecular CO
2, CH
4, CO, H
2deng synthesis gas components, through operations such as wash cooling, conversion, methanol wash column, produce coal-based gas.This technical matters is simple, production cost significantly reduces, and the quality that can realize two kinds of gasification technologies is complementary, and thermo-efficiency is high, the maximization of implement device, reduces the feature of project investment.
Therefore, the present invention is intended to the shortcoming overcoming two kinds of wide gasification technologies existence of existing application, provides one to process low-rank coal, inherently can eliminate again the method for phenols, tar pollutant in low temperature gasification technology raw gas.
Particularly, one object of the present invention is, provides a kind of method of crushed coal pressure gasifying and dry method entrained flow gasification combination producing Sweet natural gas.Another object of the present invention is, provides a kind of device for combination producing natural gas method as previously mentioned.Another object of the present invention is, provides the Sweet natural gas according to method production as previously mentioned.
For above goal of the invention, the invention provides following technical scheme:
On the one hand, the invention provides a kind of method of crushed coal pressure gasifying and dry method entrained flow gasification combination producing Sweet natural gas, described method comprises crushed coal pressure gasifying and the operating process of dry method entrained flow gasification two portions simultaneously, wherein:
Described crushed coal pressure gasifying operation employing moving-bed gasification mode take preferred size as 13-50mm coal is raw material, and water vapour and pure oxygen are vaporized chemical, in the vapourizing furnace of preferred 3.0-6.0MPa, carry out countercurrent reaction, produce raw gas;
Described dry method entrained flow gasification operation is that pure oxygen cooks vaporized chemical with dry pulverized coal charging, slag tap;
Wherein, the coal gas of high temperature mixing that the cooled coal gas produced by described crushed coal pressurized-gasification furnace produces as cold shock gas and described dry method air flow bed, the long-chain Substance Transformations such as the tar class, fatty acid and the petroleum hydrocarbon that are produced by broken coal vapourizing furnace are the synthesis gas components in the operation of described dry method entrained flow gasification.
According to the method for producing Sweet natural gas as previously mentioned, preferably, the synthesis gas components in the operation of described broken coal pressurization moving-bed gasification comprises micromolecular CO
2, CH
4, CO and H
2, after wash cooling, conversion, methanol wash column operation, produce coal-based gas.
According to the method for producing Sweet natural gas as previously mentioned, preferably, the raw material ature of coal of described gasification is selected from brown coal, young bituminous coal (as long-flame coal) and hard coal, and its ash content is at 10-35%, and moisture is at 6-38%, and calorific value is at 2900-7000Kcal/kg; By described feed coal through broken, screening, on sieve, lump coal send broken coal gasification installation to be used as crushed coal pressure gasifying raw material, and screen underflow reaches after qualified particle diameter through coal pulverizer fragmentation and is used as gas-flow bed gasifying apparatus.
According to the method for producing Sweet natural gas as previously mentioned, preferably, crushed coal pressure gasifying production run oxygen load 4000-9000NM
3/ h, raw gas temperature out 225-600 DEG C, working pressure 3.0-6.0MPa, crushed coal pressure gasifying steam oxygen ratio is 5-9Kg/NM
3.
According to the method for producing Sweet natural gas as previously mentioned, preferably, dry method entrained flow gasification working pressure controls at 3.2-8.0MPa, and oxygen load is at 10000-55000NM
3about/h, raw gas temperature out 1400-1700 DEG C, oxygen coal is than 0.7-1.2kg/kg dry coal.
According to the method for producing Sweet natural gas as previously mentioned, preferably, after the two kinds of raw gas mixing described crushed coal pressure gasifying and the operating process of dry method entrained flow gasification two portions produced, the conversion bed temperature of carbon monoxide controls between 220-430 DEG C.Further preferably, in described method, the span of control of methanation reaction hydrogen-carbon ratio is 2.2-3.5.
On the other hand, the invention provides a kind of device for combination producing natural gas method as previously mentioned, described device comprises crushed coal pressurized-gasification furnace and dry method airflow bed gasification furnace, wherein:
Described crushed coal pressurized-gasification furnace adopts liquid or dry ash extraction mode, direct depended on pressure conveying or power conveying, and outlet raw gas is used as cold shock coal gas, and temperature is about 225-600 DEG C;
Described dry method airflow bed gasification furnace is that pure oxygen cooks vaporized chemical with dry pulverized coal charging, slag tap, and gasification flame kernel temperature is between 1400-2200 DEG C, and discharged producer gas temperature is about 1400-1700 DEG C;
Wherein, the low hot raw gas Quench that described dry method airflow bed gasification furnace is produced by described crushed coal pressurized-gasification furnace, achieves the twice decomposition of the components such as coal gas is coal-tar middle oil, phenol, can make again to melt slag and cool in time and be unlikely wall built-up on water cooler.
Again on the one hand, the invention provides the Sweet natural gas according to method production as previously mentioned.
Particularly, the present invention adopts crushed coal pressure gasifying to combine dry method entrained flow gasification technique, solves following technical problem:
1, modernization coal-mining technique has tended to maximization, mechanize at present, and it is low that raw coal goes out block rate, and fine coal content is high.For this present situation, adopt crushed coal pressure gasifying and dry method air flow bed pressurized gasification coproduction mode.Raw coal screen overflow--lump coal is directly used in gasification in crushed coal pressurized-gasification furnace, and screen underflow--fine coal enters entrained flow gasification after grinding, has feed coal tooling cost low, effectively can realize the cascade utilization of coal resources;
2, the low temperature rough gas (temperature 225-600 DEG C) utilizing crushed coal pressure gasifying to produce, the coal gas of high temperature (temperature 1400-1700 DEG C) that direct Quench entrained flow gasification produces, fugitive constituent oils, phenol and lipid acid etc. in low temperature rough gas are changed into synthesis gas components, improve pressurized-gasification furnace gas production rate better, thermo-efficiency is high, and comprehensive benefit is good;
3, circulation is used as the method for quench gas, reduces the phenolic wastewater amount that gasification produces, and reduces investment and the production run cost of the follow-up waste water of crushed coal pressurized-gasification furnace, good in economic efficiency;
4, adopt brown coal drying and upgrading, thoroughly solve dry method air flow bed coal and select bottleneck problem;
5, crushed coal pressurized-gasification furnace production run is stablized, and dry method airflow bed gasification furnace is driven rapidly, and single stove gas production rate is large.Broken coal gasification and dry method entrained flow gasification combination producing, production run adjustment capability is strong, is conducive to guaranteeing safe production, thus enhances productivity.
Further, technical scheme of the present invention is adopted to obtain following technique effect: the present invention compared with the prior art, on the basis ensureing crushed coal pressure gasifying technology and dry method entrained flow bed gasification technology process advantage separately, be synthesis gas components and carbon by long-chain Substance Transformations such as tar, phenols and the fatty acids in crushed coal pressure gasifying technology raw gas, make crushed coal pressure gasifying technology inherently reduce the pollution load of follow-up waste water, meet the follow-up requirement to synthetic gas composition.
Particularly:
1. gasify after raw coal fragmentation, screening, classification, there is feed coal tooling cost low, effectively can realize the comprehensive utilization of coal resources;
2. pressurized gasification produce raw gas and mixed by the mode of cold shock, after washing, conversion, purification, be mainly used in methanation synthesis technique.
3. broken coal gasification and entrained flow gasification are effectively combined, cooled coal gas cold shock coal gas of high temperature, obvious heat efficiency is high, and two kinds of type of furnaces are had complementary advantages, and comprehensive benefit is high.
4. in raw gas crushed coal pressure gasifying produced, destructive distillation component sends into airflow bed gasification furnace second gasification, improves pressurized-gasification furnace gas production rate;
5. gas production efficiency is high, and synthetic natural gas output is large, is convenient to extensive, remote pipe network conveying.
6. reduce waste water in essence to produce, substantially without organic waste water generation, because phenolic wastewater greatly reduces, save the gas liquor separation of crushed coal pressurized-gasification furnace and the investment of phenol ammonia recovery unit and production run cost.
7. along with country is to the enforcement of " high standard, tight requirement, zero tolerance " management philosophy of Chemical Manufacture environmental protection index, the environmental benefit increasingly significant of this technique.
Finally, technical scheme of the present invention has vast potential for future development:
Along with the domestic strategy of sustainable development and the enforcement strengthening the policies such as environmental protection, domestic natural gas consumption market is by continuous expansion.Expand natural gas source supply by all kinds of means, multimode, improving air source structure becomes the grand strategy optimizing China's energy structure.The substituting and supplementing as liquefied petroleum gas (LPG) and Sweet natural gas of coal preparing natural gas, both the new way that clean energy is produced had been achieved, optimize coal process deeply industry structure, there is again the feature that energy utilization rate is high, meet the developing direction of domestic and international coal processing and utilization, for the shortage of alleviation domestic natural gas, ensure that Chinese energy safety is significant.
In the long run, the trend of China's natural gas price escalation is determined, therefore, the cost advantage of coal preparing natural gas will manifest gradually, and economic benefit is very considerable, and CHINESE COAL preparing natural gas industry development has a extensive future.Domestic coal preparing natural gas project 4 of building at present, approval total scale is 151 billion cubic meters/year, and building scale is 43 billion cubic meters/year, goes into operation during estimating 2013-2014.
This operational path is mainly applicable to the technique such as crushed coal pressurized-gasification furnace and airflow bed gasification furnace co-production coal base Sweet natural gas, coal-based synthetic oil, synthetic ammonia.For the west area that water resources is poorer, develop large-scale Coal Chemical Engineering Project, seem more competitive.
In order to the needs of the large-scale Coal Chemical Engineering Project of satisfied development; for the feature that coal resources in China low-rank coal reserves are very abundant; in addition massive mechanical coal-mining technique development and apply; utilize crushed coal pressure gasifying and dry method entrained flow gasification combination technique, meet the requirement of Modern New Development Trend of Coal Chemical Industry.The present inventor drops into through a large amount of pre-stage tests and personnel's material, and research has drawn method of the present invention and device scheme, is the inexorable trend of Modern New Development of Coal Chemical Industry, will has vast potential for future development.
Accompanying drawing explanation
Below, describe embodiment of the present invention in detail by reference to the accompanying drawings, wherein:
Fig. 1 describes the schematic flow sheet that crushed coal pressure gasifying of the present invention associating dry method entrained flow gasification produces the method for Sweet natural gas and an embodiment of device.
Embodiment
The present invention is illustrated further below by embodiment.Should be understood that, these embodiments are only used for illustrating in greater detail the present invention, and are not used in and limit the present invention in any form.
Unless otherwise noted, in embodiment, general description is carried out to the material used in the present invention's test and test method.Although for realizing many materials that the object of the invention uses and working method is well known in the art, the present invention still describes in detail as far as possible at this.
Particularly, in embodiment, dry method entrained flow bed gasification technology comprises the shell stove of Dutch Shell International Petroleum Company, the K-T stove of German Koppers Co. Inc. (US) 1450 Koppers Building, Pittsburgh, PA15219, U.S.A., the CCG bed pulverized coal gasification technology of German Ke Lin company, the GSP gasification technology of fuel gasification limited technical company of Siemens, the powdered coal pressuring gasified technique of space flight HT-L, Huaneng Group group clean energy technology graduate double-section dry coal powder pressure gasifying technology etc. of No.1 Inst., China Space Science & Technology Group Corp..
embodiment 1
Schema shown in Figure 1, the present embodiment describes crushed coal pressure gasifying of the present invention associating dry method entrained flow gasification and produces the method for Sweet natural gas and an embodiment of device.
Concrete operations are as follows:
In the present embodiment, crushed coal pressure gasifying adopts granularity to be the vaporized chemical that the brown coal of 13-50mm form with water vapour and pure oxygen, under 3.0 ~ 4.1MPa pressure, in crushed coal pressurized-gasification furnace, counter current contact carries out gasification reaction, coal gas goes out gasifier temperature and is about about 225-600 DEG C, resultant of reaction main ingredient CO, H
2, CO
2, CH
4with undecomposed water vapor, and containing a small amount of C
nh
m, N
2, (major part is H to sulfide
2s), tar, petroleum naphtha, phenol, lipid acid and the mixture such as ammonia, naphthalene.
Particularly, be fed in vapourizing furnace coal bunker by the broken coal of 13-50mm after screening by coal conveyer belt, the storage consumption of coal bunker is about the usage quantity of 3 hours during normal load.
Coal adds vapourizing furnace by the coal lockup period of coal charge chute through being arranged on top of gasification furnace, coal in stove in decline process with vaporized chemical contact reacts, from top to bottom through drying layer, destructive distillation layer, gasification layer, zone of combustion and ash bed, the ash that carbon content is about 5 ~ 7% is rotated by rotary grate and enters ash lock, timing enters ash-transmission system, pressure be the washing slag water of 0.7MPa by lime-ash discharged to slag bath.
Leave the raw gas of vapourizing furnace through being equipped with the scrubber cooler of Venturi tube, wash raw gas, cool, temperature drops to 205 ~ 210 DEG C, enters shell-tube waste heat boiler, reclaim the heat of raw gas, after temperature drops to 160 ~ 190 DEG C, send into conversion cooling system.
In the present embodiment, dry method air flow bed technique is that pure oxygen cooks vaporized chemical with dry pulverized coal charging, slag tap.Gasification flame kernel temperature is different between 1500-2200 DEG C with coal, discharged producer gas temperature 1400-1700 DEG C.The thin ash that the coal gas of high temperature produced is carried secretly also flows to into molten slag room, vapourizing furnace bottom, and raw gas is left vapourizing furnace by cooling, enters waste heat boiler and lowers the temperature, and then after cyclonic separator dedusting and washing tower dedusting, sends into conversion cooling system.Lime-ash enters slag bath through slag bucket.
Crushed coal pressurized-gasification furnace and dry method entrained flow gasification technique combine, as follows for the technical process of shell gasification technology: feed coal is through fragmentation, screening, on sieve, lump coal send broken coal gasification installation to be used as gasified raw material, fine coal is used as gas-flow bed gasifying apparatus, the fine coal entering pulverized coal preparation system after drying by nitrogen or carbon dioxide gas through dense to being delivered to Stokehole pulverized coal storehouse and lock hopper, via pressurized nitrogen or carbon dioxide gas pressurization, duff particle is being sent into circumference gasification burner tip positioned opposite by lock hopper, the oxygen that gasification needs and water vapour also send into burner, 1400 DEG C are about in vapourizing furnace, gasifier operation pressure is 3.0-4.0MPa.Ash content in vapourizing furnace in coal is discharged with slag form, and cooling pulp water can be used as the scrubbing dust collection moisturizing of raw gas after treatment.The raw gas going out vapourizing furnace is entrained with the slag particles that disperses by the cooled coal gas Quench from crushed coal pressurized-gasification furnace, slag is solidified and unlikelyly coheres on syngas cooler wall, then removing from coal gas.This part gasification gas directly contacts with the cooled coal gas of crushed coal pressure gasifying, and decomposition reaction occurs, and decompose in cooled coal gas in short-term containing fugitive constituent oils, phenol and lipid acid, change into synthetic gas, temperature is about 800-900 DEG C.
After raw gas leaves waste heat boiler, carry out removing part dust through porcelain filter or tornado dust collector, then gas mixture is after Venturi tube, washing tower wash cooling, after temperature drops to 220 DEG C, enter middle temperature sulfur-resisting transformation system, the ratio of carbon monoxide and hydrogen in adjustment raw gas, conversion gas is with pressure 3.2-3.5MPa, temperature about 40 DEG C enters low temperature washing device for methanol, oil removing, desulfurization, decarburization, and the cold on its absorption tower comes from ammonia compression refrigerating apparatus.Purified gas sends into two-stage methanator, first order reaction pressure 2.9-3.0MPa, temperature 550 ~ 600 DEG C, second order reaction 2.0 ~ 2.5MPa, temperature 300 ~ 330 DEG C, produces the methane that purity is about 92 ~ 96% after eventually passing cooling, drying, sends into gas distributing system after compression.
embodiment 2
By processing method described in above embodiment 1, to produce 400 × 10 daily
4nm
3natural Gas Projects calculates, and economic benefit situation is as follows:
(1) cost of investment:
First phase of construction 4 is overlapped gas liquor and is separated and 2 cover phenol recovery project investment (comprising equipment purchasing, installation work and construction work) 3.36 hundred million yuan.
(2) year productivity effect:
1. Wastewater Pretreatment running cost about 30 yuan/t waste water × 30t/ stove × 8000 hour=7,200,000 yuan;
2. the oils produced according to crushed coal pressure gasifying destructive distillation is that master is all transformed into coal gas, and calculating gas yield is 1.09NM
3/ kg, and original design gas yield is 0.965NM
3/ kg;
(1.09-0.965) × 40287kg × 8000 hour=40,290,000 NM
3÷ 3.738=1078 ten thousand NM
3× 2.7 yuan=2,911 ten thousand yuan;
3. single stove coal tar, crude phenols and middle oil yield conversion economic benefit:
5.39 ten thousand tons of ÷ 16 × 25,00=,842 ten thousand yuan
2.06 ten thousand tons of ÷ 16 × 50,00=,644 ten thousand yuan
6.66 ten thousand tons of ÷ 16 × 280,0=1,167 ten thousand yuan
4. separate unit stove all changes into Sweet natural gas many wounds benefit:
2911-842-644-1167=259 ten thousand yuan
Total benefit: 72,0+2,59=,979 ten thousand yuan.
5. domestic crushed coal pressurized-gasification furnace meter 153, realizes this technique coproduction many wounds benefit by 1/3rd:
50 × 979,=48,950 ten thousand yuan.
Claims (9)
1. a method for crushed coal pressure gasifying and dry method entrained flow gasification combination producing Sweet natural gas, is characterized in that, described method comprises crushed coal pressure gasifying and the operating process of dry method entrained flow gasification two portions simultaneously, wherein:
Described crushed coal pressure gasifying operation employing moving-bed gasification mode take preferred size as 13-50mm coal is raw material, and water vapour and pure oxygen are vaporized chemical, in the vapourizing furnace of preferred 3.0-6.0MPa, carry out countercurrent reaction, produce raw gas;
Described dry method entrained flow gasification operation is that pure oxygen cooks vaporized chemical with dry pulverized coal charging, slag tap;
Wherein, the coal gas of high temperature mixing that the cooled coal gas produced by described crushed coal pressurized-gasification furnace produces as cold shock gas and described dry method air flow bed, the long-chain Substance Transformations such as the tar class, fatty acid and the petroleum hydrocarbon that are produced by broken coal vapourizing furnace are the synthesis gas components in the operation of described dry method entrained flow gasification.
2. produce the method for Sweet natural gas as claimed in claim 1, it is characterized in that, the synthesis gas components in described dry method entrained flow gasification operation comprises micromolecular CO
2, CH
4, CO and H
2, after wash cooling, conversion, methanol wash column operation, produce coal-based gas.
3. produce the method for Sweet natural gas as claimed in claim 1 or 2, it is characterized in that, the raw material ature of coal of described gasification is selected from brown coal, young bituminous coal (as long-flame coal) and hard coal, and its ash content is at 10-35%, moisture is at 6-38%, and calorific value is at 2900-7000Kcal/kg; By described feed coal through broken, screening, on sieve, lump coal send broken coal gasification installation to be used as crushed coal pressure gasifying raw material, and fine coal is used as gas-flow bed gasifying apparatus.
4. as described in any one of claim 1-3, produce the method for Sweet natural gas, it is characterized in that, crushed coal pressure gasifying production run oxygen load 4000-9000NM
3/ h, raw gas temperature out 225-600 DEG C, working pressure 3.0-6.0MPa, crushed coal pressure gasifying steam oxygen ratio is 5-9kg/Nm
3.
5. as described in any one of claim 1-4, produce the method for Sweet natural gas, it is characterized in that, dry method entrained flow gasification working pressure controls at 3.2-8.0MPa, and oxygen load is at 10000-55000Nm
3about/h, raw gas temperature out 1400-1700 DEG C, oxygen coal is than 0.7-1.2kg/kg dry coal.
6. as described in any one of claim 1-5, produce the method for Sweet natural gas, it is characterized in that, after the two kinds of raw gas mixing described crushed coal pressure gasifying and the operating process of dry method entrained flow gasification two portions produced, the conversion bed temperature of carbon monoxide controls between 220-430 DEG C.
7. produce the method for Sweet natural gas as claimed in claim 6, it is characterized in that, in described method, the span of control of methanation reaction hydrogen-carbon ratio is 2.2-3.5.
8. for the device of combination producing natural gas method according to any one of claim 1-7, it is characterized in that, described device comprises crushed coal pressurized-gasification furnace and dry method airflow bed gasification furnace, wherein:
Described crushed coal pressurized-gasification furnace adopts liquid or dry ash extraction mode; The direct depended on pressure conveying of raw gas or power conveying, as cold shock coal gas, discharged producer gas temperature is about 225-600 DEG C;
Described dry method airflow bed gasification furnace is with dry pulverized coal charging, pure oxygen cooks vaporized chemical, slag tap, and pulp water is after treatment as the scrubbing dust collection water of raw gas, gasification flame kernel temperature is between 1400-2200 DEG C, and discharged producer gas temperature is about 1400-1700 DEG C;
Wherein, the low hot raw gas Quench that described dry method airflow bed gasification furnace is produced by described crushed coal pressurized-gasification furnace, achieves the twice decomposition of the components such as coal gas is coal-tar middle oil, phenol, can make again to melt slag and cool in time and be unlikely at water cooler wall built-up.
9. the Sweet natural gas that method is produced according to any one of claim 1-7.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718760A (en) * | 2020-06-23 | 2020-09-29 | 中国华能集团清洁能源技术研究院有限公司 | Sulfur-tolerant methanation system and method for coal-based natural gas |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4211540A (en) * | 1978-12-29 | 1980-07-08 | Fluor Corporation | Process for the manufacture of fuel gas |
| AU2988284A (en) * | 1983-06-28 | 1985-01-03 | Shell Internationale Research Maatschappij B.V. | A process for the preparation of a carbon monoxide and hydrogen containing gas |
| CN102649683A (en) * | 2012-03-26 | 2012-08-29 | 山西阳煤丰喜肥业(集团)有限责任公司 | Method for producing methanol by combined gasification of lurgi gasification wastewater through treatment of coal water slurry furnace |
| CN103013576A (en) * | 2012-12-10 | 2013-04-03 | 陕西华祥能源科技集团有限公司 | IGCC (Integrated Gasification Combined Cycle) poly-generation device and method based on pyrolysis and gasification of low metamorphic powdered coal |
| CN203238224U (en) * | 2013-03-29 | 2013-10-16 | 陕西煤业化工技术研究院有限责任公司 | Multi-size grading pyrolysis-gasification integrated system for raw coal |
-
2014
- 2014-06-09 CN CN201410253744.4A patent/CN105273785A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4211540A (en) * | 1978-12-29 | 1980-07-08 | Fluor Corporation | Process for the manufacture of fuel gas |
| AU2988284A (en) * | 1983-06-28 | 1985-01-03 | Shell Internationale Research Maatschappij B.V. | A process for the preparation of a carbon monoxide and hydrogen containing gas |
| CN102649683A (en) * | 2012-03-26 | 2012-08-29 | 山西阳煤丰喜肥业(集团)有限责任公司 | Method for producing methanol by combined gasification of lurgi gasification wastewater through treatment of coal water slurry furnace |
| CN103013576A (en) * | 2012-12-10 | 2013-04-03 | 陕西华祥能源科技集团有限公司 | IGCC (Integrated Gasification Combined Cycle) poly-generation device and method based on pyrolysis and gasification of low metamorphic powdered coal |
| CN203238224U (en) * | 2013-03-29 | 2013-10-16 | 陕西煤业化工技术研究院有限责任公司 | Multi-size grading pyrolysis-gasification integrated system for raw coal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718760A (en) * | 2020-06-23 | 2020-09-29 | 中国华能集团清洁能源技术研究院有限公司 | Sulfur-tolerant methanation system and method for coal-based natural gas |
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