CN101200408A - Preparation technique of methanol by lignite gasification and special equipment thereof - Google Patents
Preparation technique of methanol by lignite gasification and special equipment thereof Download PDFInfo
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- CN101200408A CN101200408A CN 200610165705 CN200610165705A CN101200408A CN 101200408 A CN101200408 A CN 101200408A CN 200610165705 CN200610165705 CN 200610165705 CN 200610165705 A CN200610165705 A CN 200610165705A CN 101200408 A CN101200408 A CN 101200408A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
The invention relates to a process for preparing methanol from brown coal in gasification, which is characterized in that: the brown coal is crushed to brown coal powder of less 8; the brown coal powder is arranged into a totally-enclosed processing warehouse for being dried, and then is delivered into a direct-injection fluidization and gasification gas furnace in inside and outside cycle; the air and vapor are mixed to prepare the gasification agent with rich oxygen by adopting a transformation oxygen-enrichment adsorption process unit; the gasification agent is delivered into a furnace from the bottom of the direct-injection fluidization and gasification gas furnace in inside and outside cycle; and the clean water is sprayed into the furnace from the bottom. The fully mixed material in the furnace is implemented on high temperature and high pressure, so that which is cracked to generate the air with rich methanol, further, the high-purity methanol can be generated when the air with rich methanol is processed through separation, desulfurization, decarbonization and purification. The adaptability of low-quality feed coal can be expanded by taking the low-quality as raw material according to the process for preparing methanol, thereby the utilization rate of the desulfurization and gasification on the feed coal can be improved; the energy consumption can be lowered, the environmental quality can be improved; and the economical efficiency is stronger. The invention also provides special equipment so as to meet the needs of the process.
Description
Technical field
The present invention relates to chemical field, relate in particular to coal chemical technology, be specially and utilize the low-quality brown coal independently to prepare the methanol technics method.
Background technology
At present, the Energy resources feature of China is rich coal, weak breath, oil starvation, according to the energy development of China and energy security strategy and national " Eleventh-Five Year Plan outline ", develops coal-based liquid fuel and will be important directions from now on.But inferior coal occupies a large number of in the coal resources of China, according to statistics, whole nation coal reserves is 2628.4 hundred million tons, wherein the low-quality coal charge---the brown coal workable reserve is 708.3 hundred million tons, account for more than the national coal reserves 1/4, the countries mine amount is few at present, generally can only be used in the purposes of the coal-based Poly-generation of Coal Chemical Industry.National conditions according to coal resources; according to the policy of not striving the big energy strategy target of the energy with country; how to adopt more advanced technology reliably; in the hope of solving large-scale production problem fully, open up use low grade coal, low input, high-quality independent preparation methanol technics new way with low-quality brown coal hydrogasification system methyl alcohol.
Being the raw material production methanol technics with the coal has experienced the conversion of three generations's Technology since the thirties in 20th century, and technology progressive core is the preparation of methanol feedstock gas.This technology towards the production intensity that improves vapourizing furnace, improves single stove treatment capacity always, accepts many coals, powder coal, satisfies environmental requirement, reduces oxygen consumption, coal consumption, aspect development such as the economy of raising gasification and overall efficiency.But in fact; in the technical progresses such as fuel motion state, bed layer pressure grade and deslagging state of methanol feedstock gas in feed state, bed; bring the negative issue that investment increases sharply, maintenance cost increases again, influenced the development and the market promotion of mass-producing.
At present in the popular vaporizing system gas process of China and foreign countries, usually adopting coal water slurry is raw material, carry out high-temperature chemical reaction, generate the gas that is rich in methyl alcohol, this technology is owing to the liquid of one of raw material collection, insufficient with oxygen mix, the material carbon utilization ratio that exists is low, water loss big and problem such as environmental protection, carries out the specific aim research and development, makes it only to bring into play scale effect under the situation of foreign technology 40-50% in investment, being the starting point of this invention, also is foothold.
Summary of the invention
The purpose of this invention is to provide a kind of being used for the inferior coal is the adaptability that feedstock production methanol technics technology enlarges the low-quality raw materials coal, improves feed coal fluidized gasification utilization ratio, cuts down the consumption of energy, improves environment-friendly quality, has stronger economy.
Another object of the present invention provides the technology institute specific equipment that brown coal hydrogasification prepares methyl alcohol, is used to satisfy the needs of this technological process.
In order to achieve the above object, the present invention takes following scheme:
Brown coal hydrogasification prepares the technology of methyl alcohol, and its method mainly may further comprise the steps: the raw material high-temperature gasification is generated the gas mixture that is rich in methanol gas, and a step separation, desulfurization, decarburization are purified again, obtain high purity methanol, comprise following processing step:
A) brown coal powder is broken to the brown coal powder of granularity＜8;
B) above-mentioned brown coal powder is sent into totally-enclosed processing storehouse, the inside and outside ciculation fluidized gasification gas producer of last direct injection is sent in oven dry;
C) adopt transformation absorption oxygen enriching process device, mixing air and water vapour are prepared into the vaporized chemical that is rich in oxygen;
D) nozzle of above-mentioned vaporized chemical ciculation fluidized gasification gas producer bottom inside and outside the last direct injection is sent in the stove; Spray into water purification at regular time and quantity from the stove bottom.
E) give well-mixed raw material High Temperature High Pressure in stove, cracking produces the gas that is rich in methyl alcohol.The oxygenous amount volume ratio of described vaporized chemical is 68%--98%.
Described sepn process comprises the gas that is rich in methyl alcohol that draws on ciculation fluidized gasification gas producer top inside and outside the last direct injection flow through successively waste heat boiler, cooling tower, washing tower, separator.
Described sepn process is the outer circulation process, and the water that uses in the sepn process is concentrated precipitation, purified recycle.
After the described brown coal powder oven dry, ciculation fluidized gasification gas producer inside and outside coal bunker is sent into last direct injection; In described coal bunker, inject safe gas.To prevent that producer gas from flowing backwards; Also can regulate the coal conveyor revolution and change the coal supply amount by frequency transformer.
Each technological process of described whole production all adopts whole closing appliance.Prevent dust polluting environment, and the direct labor produced body and mind harm that guarantee the purity of filling reaction and product of raw material simultaneously, equipment is totally-enclosed, pollution-free, the automatic safety operation.
Each technological process of described whole production all adopts the full-automatic computer Controlling System.From the brown coal powder get the raw materials ready, oven dry, coal supply, regulate coal dust and gasification dosage, temperature, pressure reduction in the test furnace, and ash discharge; The metering of waste heat boiler parameter; Consumption and output such as oxygen enrichment composition, steam, water, coal gas; Security alerting system all adopts whole closing appliance, carries out computer control according to independent system.
Brown coal hydrogasification prepares the process special equipment of methyl alcohol: the inside and outside ciculation fluidized gasification gas producer of last direct injection is vertical stove, the furnace wall is vertical, there is not fire grate in the stove, furnace bottom is a back taper, the sidewall of conical lower portion also is provided with the direct injection nozzle, kiln body top is provided with venting port, and the bottom is provided with ash discharge opening and water filling port
The invention has the beneficial effects as follows: raw material adopts the brown coal powder and without coal water slurry, above-mentioned brown coal powder is sent into totally-enclosed processing storehouse, being prepared into the vaporized chemical and the water purification that are rich in oxygen sprays at regular time and quantity from the stove bottom, under high-temperature condition, form airflow upwards, the holder coal dust floats in the stove, under the effect of the vaporized chemical that continues to be rich in oxygen, water vapor, coal dust fully contacts with vaporized chemical that is rich in oxygen and water vapor, and chemical reaction is complete.
The water that uses in the sepn process is concentrated precipitation, is purified, recycle, a large amount of conserve water resources.
Brown coal hydrogasification prepares the process special equipment of methyl alcohol: the inside and outside ciculation fluidized gasification gas producer of last direct injection is vertical stove, the furnace wall is vertical, there is not fire grate in the stove, furnace bottom is a back taper, the sidewall of conical lower portion also is provided with the direct injection nozzle, kiln body top is provided with venting port, and the bottom is provided with ash discharge opening and water filling port.Adopt no fire grate, and by the principle of airflow, design very ingeniously, exceed the imagination of conventional production process method, non-those skilled in the art can imagine, and have pioneering construction meaning.
Description of drawings:
Fig. 1 is the technical process first half synoptic diagram of an embodiment of the present invention.
Fig. 2 is a technical process rear section synoptic diagram embodiment illustrated in fig. 1.
Embodiment
Brown coal hydrogasification prepares the technology of methyl alcohol, and its technical process mainly may further comprise the steps as shown in Figures 1 and 2:
Brown coal powder is broken to the brown coal powder of granularity＜8; Above-mentioned brown coal powder is sent into totally-enclosed processing storehouse, oven dry, after the oven dry of brown coal powder, ciculation fluidized gasification gas producer inside and outside coal bunker is sent into last direct injection; In described coal bunker, inject safe gas.Send into the inside and outside ciculation fluidized gasification gas producer of last direct injection; Adopt transformation absorption oxygen enriching process device, mixing air and water vapour are prepared into the vaporized chemical that is rich in oxygen; The nozzle of above-mentioned vaporized chemical ciculation fluidized gasification gas producer bottom inside and outside the last direct injection is sent in the stove; Spray into water purification at regular time and quantity from the stove bottom.Give well-mixed raw material High Temperature High Pressure in stove, cracking produces the gas that is rich in methyl alcohol.A step separates again, and sepn process comprises the gas that is rich in methyl alcohol that draws on ciculation fluidized gasification gas producer top inside and outside the last direct injection flow through successively waste heat boiler, cooling tower, washing tower, separator.The gas that is rich in methyl alcohol that comes out from separator further passes through desulfurization, decarburization, is compressed into liquid state, synthesizes, separates, and slightly heats up in a steamer to obtain thick methanol product, also can then carry out fore-distillation, and pressurization is purified, and obtains high purity methanol.
The oxygenous amount volume ratio of vaporized chemical is 68%--98%, and oxygen accounts for major part in the vaporized chemical, is used in low-quality brown coal chemical reaction.
Sepn process is the outer circulation process, and the water that uses in the sepn process is concentrated precipitation, purified recycle.
Brown coal hydrogasification prepares the process special equipment of methyl alcohol: its basic structure gasification producer part as shown in fig. 1, direct injection inside and outside ciculation fluidized gasification gas producer in end is vertical stove, the furnace wall is vertical, there is not fire grate in the stove, furnace bottom is a back taper, the sidewall of conical lower portion also is provided with the direct injection nozzle, and kiln body top is provided with venting port, and the bottom is provided with ash discharge opening and water filling port
In concrete the application, can adopt oxygen enrichment (oxygen, air) and steam to be in fluidized state, three gas mix the back by the bottom about, side adopts direct injection nozzle atm number to inject producer, make brown coal powder and vaporized chemical in the producer fully react generation coal gas, the mode that outer circulation combines in adopting simultaneously with in the raw gas as yet not the material carbon particle of complete reaction return vapourizing furnace and carry out ciculation fluidized gasification, improve the material carbon utilization ratio.
Circulating high-efficiency water purifying treatment device: be reduce water consumption, adopt water precipitation, cooling, body refuse to handle circulating utilization.
Totally-enclosed, full-automatic computer control fluidized gasification system: from the brown coal powder get the raw materials ready, oven dry, coal supply, regulate coal dust and gasification dosage, temperature, pressure reduction in the test furnace, and ash discharge; The metering of waste heat boiler parameter; Consumption and output such as oxygen enrichment composition, steam, water, coal gas; Security alerting system all adopts whole closing appliance, carries out computer control according to independent system.
With methanol feedstock gas synthesizing methanol according to a conventional method.
Brown coal processing granularity can reach＜8 brown coal powder; Adopt the oxygen enriching process device to prepare the vaporized chemical that volume ratio is oxygen 98% and air 2%; With 230 ℃, the 0.4MPa steam mixes; Vapourizing furnace is no fire grate, direct injection, atm number, internal and external circulation type, makes fully fluidisation of coal dust end; Use recirculated water, reduce water loss; Equipment is totally-enclosed, pollution-free, the automatic safety operation.
Above embodiment is only for the usefulness that the present invention is described, but not to restriction of the present utility model, person skilled in the relevant technique is under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or variation, as: each technological process of whole production all adopts whole closing appliance.Each technological process of whole production all adopts the full-automatic computer Controlling System.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (8)
1. brown coal hydrogasification prepares the technology of methyl alcohol, its method mainly may further comprise the steps: the raw material high-temperature gasification is generated the gas mixture that is rich in methanol gas, and a step separation, desulfurization, decarburization are purified again, obtain high purity methanol, it is characterized in that: comprise following processing step:
A) brown coal powder is broken to the brown coal powder of granularity＜8;
B) above-mentioned brown coal powder is sent into totally-enclosed processing storehouse, the inside and outside ciculation fluidized gasification gas producer of last direct injection is sent in oven dry;
C) adopt transformation absorption oxygen enriching process device, mixing air and water vapour are prepared into the vaporized chemical that is rich in oxygen;
D) nozzle of above-mentioned vaporized chemical ciculation fluidized gasification gas producer bottom inside and outside the last direct injection is sent in the stove; Spray into water purification at regular time and quantity from the stove bottom.
E) give well-mixed raw material High Temperature High Pressure in stove, cracking produces the gas that is rich in methyl alcohol.
2. brown coal hydrogasification as claimed in claim 1 prepares the technology of methyl alcohol, it is characterized in that: the oxygenous amount volume ratio of described vaporized chemical is 68%-98%.
3. brown coal hydrogasification as claimed in claim 1 prepares the technology of methyl alcohol, it is characterized in that: described sepn process comprises the gas that is rich in methyl alcohol that draws on ciculation fluidized gasification gas producer top inside and outside the last direct injection flow through successively waste heat boiler, cooling tower, washing tower, separator.
4. brown coal hydrogasification as claimed in claim 3 prepares the technology of methyl alcohol, it is characterized in that: described sepn process is the outer circulation process, and the water that uses in the sepn process is concentrated precipitation, purified recycle.
5. brown coal hydrogasification as claimed in claim 1 prepares the technology of methyl alcohol, it is characterized in that: after the described brown coal powder oven dry, and ciculation fluidized gasification gas producer inside and outside coal bunker is sent into last direct injection; In described coal bunker, inject safe gas.
6. brown coal hydrogasification as claimed in claim 1 prepares the technology of methyl alcohol, it is characterized in that: each technological process of described whole production all adopts whole closing appliance.
7. brown coal hydrogasification as claimed in claim 1 prepares the technology of methyl alcohol, it is characterized in that: each technological process of described whole production all adopts the full-automatic computer Controlling System.
8. brown coal hydrogasification as claimed in claim 1 prepares the process special equipment of methyl alcohol, it is characterized in that: the inside and outside ciculation fluidized gasification gas producer of described last direct injection is vertical stove, the furnace wall is vertical, there is not fire grate in the stove, furnace bottom is a back taper, the sidewall of conical lower portion also is provided with the direct injection nozzle, and kiln body top is provided with venting port, and the bottom is provided with ash discharge opening and water filling port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610165705 CN101200408A (en) | 2006-12-13 | 2006-12-13 | Preparation technique of methanol by lignite gasification and special equipment thereof |
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| CN 200610165705 CN101200408A (en) | 2006-12-13 | 2006-12-13 | Preparation technique of methanol by lignite gasification and special equipment thereof |
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| CN 200610165705 Pending CN101200408A (en) | 2006-12-13 | 2006-12-13 | Preparation technique of methanol by lignite gasification and special equipment thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810283A (en) * | 2012-07-26 | 2012-12-05 | 天津津大莱博科技有限公司 | Coal gasification methanol simulation training platform and control method thereof |
| CN102892869A (en) * | 2010-04-16 | 2013-01-23 | 新日铁住金工程技术株式会社 | Coal gasification system and coal gasification method |
| CN101503641B (en) * | 2009-03-04 | 2013-02-27 | 上海泽玛克敏达机械设备有限公司 | Heat pressing moulding process and equipment for lignite rich in water after drying process |
-
2006
- 2006-12-13 CN CN 200610165705 patent/CN101200408A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503641B (en) * | 2009-03-04 | 2013-02-27 | 上海泽玛克敏达机械设备有限公司 | Heat pressing moulding process and equipment for lignite rich in water after drying process |
| CN102892869A (en) * | 2010-04-16 | 2013-01-23 | 新日铁住金工程技术株式会社 | Coal gasification system and coal gasification method |
| CN102892869B (en) * | 2010-04-16 | 2014-08-20 | 新日铁住金工程技术株式会社 | Coal gasification system and coal gasification method |
| CN102810283A (en) * | 2012-07-26 | 2012-12-05 | 天津津大莱博科技有限公司 | Coal gasification methanol simulation training platform and control method thereof |
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Open date: 20080618 |