CN103423589B - Liquid oxygen vaporizing system for technology of preparing methanol with coke oven gas and technology - Google Patents
Liquid oxygen vaporizing system for technology of preparing methanol with coke oven gas and technology Download PDFInfo
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- CN103423589B CN103423589B CN201310378084.8A CN201310378084A CN103423589B CN 103423589 B CN103423589 B CN 103423589B CN 201310378084 A CN201310378084 A CN 201310378084A CN 103423589 B CN103423589 B CN 103423589B
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Abstract
The invention discloses a liquid oxygen vaporizing system for a technology of preparing methanol with coke oven gas and the technology. The structure of the liquid oxygen vaporizing system is that an air separation workshop section in the technology of preparing the methanol with the coke oven gas is communicated with a conversion workshop section through an oxygen compressor, the system further comprises a liquid oxygen storage tank and a vaporizer, and inlets of the liquid oxygen storage tank, the vaporizer and the oxygen compressor are sequentially communicated through pipelines. Aiming at the problems that the amount of oxygen can not meet needs of the conversion technology, the conversion rate of the methane is low, and therefore the improvement of the yield of the methanol is limited, an improvement is carried out on the system and method. Through research and exploration of coke oven gas conversion characteristics in the technology of preparing the methanol with the coke oven gas and the liquid oxygen vaporizing device, the method that a liquid oxygen vaporizing technology is improved to increase the yield of the oxygen in an air separation system is provided. Through the liquid oxygen vaporizing device, the system and method improve the amount of the oxygen supplied to the conversion workshop section, improve the temperature of a conversion furnace and enhance the conversion effect of methane, and therefore the yield of the methanol is improved.
Description
Technical field
The present invention relates to one, especially a kind of vaporization of liquid oxygen system of coke-stove gas methanol technics and technique.
Background technique
Coal chemical industry enterprises utilizes coke-stove gas for raw material, prepares methyl alcohol by desulfurization, conversion, synthesis, rectifying, the sky workshop section that grades.At conversion section, in firing chamber, reburner top, portion of methane, C in oven gas
nh
m, oxygen in hydrogen and pure oxygen steam burns, release a large amount of heat, to supply methane conversion institute calorific requirement, upper pyrometer gas enters bottom catalyst layer, in coke-stove gas, methane and alkynes, alkene are under nickel accelerant effect, carry out conversion reaction with steam, promote that methane is to the available gas conversion of methanol-fueled CLC, to promote the carrying out that methanol-fueled CLC reacts.
In said process, amount of oxygen deficiency can cause in the burning of reburner top coke-stove gas insufficient, reburner fire box temperature is low, thus affect carry out of methane in the conversion reaction of reburner catalyst layer, carbon monoxide content declines, and in synthetic gas, available gas component content reduces, and methane content exceeds standard, the crude carbinol output of synthesis reduces, and what restrict methyl alcohol efficiently carries product.Therefore, the size of conversion section amount of oxygen is one of key factor affecting coke-stove gas methanol technics production capacity.Transform required pure oxygen from supporting Kong Fen workshop section, enter conversion section by oxygen compressor, when amount of oxygen cannot meet technique needs, this workshop section's system restricts by equipment, is difficult to significantly improve oxygen output, thus the raising of restriction methanol output.
At present, some coal chemical enterprise is for improving amount of oxygen, and carry out supplemental oxygen by increasing oxygenerator, but program investment cost is high, floor space is large, and cannot adjust oxygen making amount according to need of production, unnecessary oxygen is let go, and causes great waste.Also need in addition to be equipped with operator specially, increase cost of labor, Economy is poor, is unfavorable for energy efficiency, increases burden for enterprise produces.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of vaporization of liquid oxygen system of coke-stove gas methanol technics of supplementary conversion section amount of oxygen; Present invention also offers a kind of vaporization of liquid oxygen technique of coke-stove gas methanol technics.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the Kong Fen workshop section in described coke-stove gas methanol technics is communicated with conversion section by oxygen compressor, it is characterized in that: it includes liquid oxygen storage tank and vaporizer; Described liquid oxygen storage tank, vaporizer are communicated with by pipeline successively with the entrance of oxygen compressor.
Pipeline between liquid oxygen storage tank of the present invention and vaporizer is parallel with pipeline, described vaporizer and the outlet of oxygen compressor that liquid oxygen pump and middle pressure storage tank are formed.
Vaporizer of the present invention is water bath type vaporizer.
Middle pressure storage tank of the present invention is with self-supercharging device.
Present invention process adopts above-mentioned vaporization of liquid oxygen system: (1), when space division system oxygen inflate quantity is low, the oxygen that the liquid oxygen in liquid oxygen storage tank generates with Kong Fen workshop section after vaporizer vaporization enters conversion section through oxygen compressor;
(2) when space division system scram or long-term maintenance are stopped, the liquid oxygen in liquid oxygen storage tank through liquid oxygen pump pressure-raising, through in press storage tank to regulate pressure, vaporizer to vaporize after, the outlet of oxygen compressor enters conversion section.
Described in present invention process, oxygen to the pressure of oxygen compressor entrance of vaporizer vaporization is 0.02 ~ 0.04MPa, and oxygen compressor is 2.3 ~ 2.6MPa to the pressure of conversion section.
The beneficial effect adopting technique scheme to produce is: the present invention is directed to amount of oxygen and cannot meet conversion process needs, methane conversion is low, the problem that restriction methanol output improves is improved, by to the current characteristic of preparing methanol from coke oven gas technology converting coke oven gas and the research and probe of vaporization of liquid oxygen device, propose to carry out improving the method improving oxygen output to vaporization of liquid oxygen technique.The present invention, by vaporization of liquid oxygen device, improves the oxygen-supplying amount to conversion section, improves reburner temperature, strengthens the changing effect of methane, thus improves methanol output.Main feature of the present invention is as follows: 1. in liquid oxygen storage tank, liquid oxygen fills into pipe network after vaporization, with space division system production oxygen mix, improves conversion section amount of oxygen, sends into reburner firing chamber and CH
4carry out partial oxidation reaction, improve reburner fire box temperature, promote that methane is to monoxide conversion, improves methanol output; 2. when space division system or oxygen compressor stop, liquid oxygen in liquid oxygen storage tank can also pass through liquid oxygen pump pressure-raising, directly sends into pipe network, avoid because Kong Fen workshop section or oxygen compressor fault cause methanol production to stop by liquid oxygen carburetor gasification, what guarantee was produced continues to carry out, and is enterprise's create beneficial result.3. the purity of oxygen of vaporizing is comparatively stable, can remain at 99.6%, and space division system output oxygen purity floats comparatively large, cannot maintain 99.6% all the time, vaporization oxygen with empty point produce oxygen mix after, effectively can improve oxygen purity, be conducive to production and carry out.Through measuring and calculating, the inventive method is applied to the coke-stove gas methyl alcohol system of 200,000 tons/year, year can increase yield of methanol about 3000 tons, and year creates benefit Yue Keda more than 130 ten thousand yuan.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is flowage structure schematic diagram of the present invention.
Embodiment
Coke-stove gas methanol technics comprises desulfurization, conversion, synthesis, rectifying, sky grade workshop section; Kong Fen workshop section is communicated with conversion section by oxygen compressor.The vaporization of liquid oxygen system of this coke-stove gas methanol technics processed includes liquid oxygen storage tank and vaporizer; Described liquid oxygen storage tank, vaporizer are communicated with by pipeline successively with the entrance of oxygen compressor.Pipeline between described liquid oxygen storage tank and vaporizer is parallel with pipeline, described vaporizer and the outlet of oxygen compressor that liquid oxygen pump and middle pressure storage tank are formed.Described vaporizer preferably adopts water bath type vaporizer, better to control vapourizing temperature.Described middle pressure storage tank is preferably with self-supercharging device.
The technological process that the vaporization of liquid oxygen method of this coke-stove gas methanol technics processed is concrete is: (1) when air compressor inflate quantity low, when causing space division system oxygen inflate quantity low, the oxygen that the liquid oxygen in liquid oxygen storage tank generates with Kong Fen workshop section after vaporizer vaporization enters conversion section through oxygen compressor;
(2) when space division system scram or long-term maintenance are stopped, the liquid oxygen in liquid oxygen storage tank through liquid oxygen pump pressure-raising, through in press storage tank to regulate pressure, vaporizer to vaporize after, the outlet of oxygen compressor enters conversion section.
The vaporizer of the vaporization of liquid oxygen method of this coke-stove gas methanol technics processed adopts heating water bath mode that the liquid oxygen from liquid oxygen storage tank is heated up and vaporizes, making bath temperature remain on 50 ~ 60 DEG C by controlling heating steam Throughput, regulating vaporized oxygen tolerance by regulating vaporizer outlets valve opening size.By regulating carburetor inlet valve opening size to make the vaporized oxygen atmospheric pressure entering oxygen compressor entrance remain on about 0.02 ~ 0.04MPa, the vaporized oxygen atmospheric pressure passing into oxygen compressor outlet by regulating liquid oxygen pump terminal valve and middle pressure tank inner pressure to make remains on 2.3 ~ 2.6MPa.Oxygen enters reburner and coke-stove gas mixed combustion heat release, because conversion of methane is heat absorption reaction (CH
4+ H
2o=CO+3H
2+ Q, CH
4+ CO
2=2CO+2H
2+ Q) improve amount of oxygen, can effectively improve reburner fire box temperature, promote the carrying out of conversion of methane, improve methanol output.
Fig. 1 is the flowage structure schematic diagram of the vaporization of liquid oxygen system of this coke-stove gas methanol technics processed, its concrete technological process is: vaporizer chuck is injected fresh water by (1), and pass into low pressure steam, carburettor temperature is made to reach 50 DEG C ~ 60 DEG C, open liquid oxygen storage tank outlet valve, liquid oxygen pump by-pass valve F1, middle pressure storage tank by-pass valve F2, and carburetor inlet valve, inject liquid oxygen to vaporizer.When vaporizer internal pressure reaches 2 ~ 4KPa, open oxygen compressor inlet valve F3, fill into oxygen to system.
(2) when oxygen need be filled into directly to oxygen compressor outlet, cut-off valve F1, F2, open liquid oxygen pump terminal valve, middle pressure reservoir inlet valve, starts liquid oxygen pump and injects liquid oxygen to middle pressure storage tank, press outlet modulating valve V1 in adjustment, adjustment enters vaporizer liquid oxygen amount, when vaporizer internal pressure reaches 2.3 ~ 2.6MPa, open vaporizer outlets valve, control to fill into amount of oxygen to system by modulating valve V2.
Embody rule example: the coke-stove gas methanol technics of Hebei coal chemical industry enterprises, CH in synthetic gas during normal production
4content is 1.8%, and reburner fire box temperature is 890 DEG C, and CO content is 16.5%.After adopting this vaporization of liquid oxygen apparatus and method shown in Fig. 1, per hour to conversion section supplemental oxygen 1000NM
3, CH in synthetic gas
4content is being down to less than 1%, and reburner fire box temperature rises to 920 DEG C, and CO content is 18.2%, efficiently solves the low outlet of reburner bore temperature, the problem that methane content is high, improves the content of effective component in synthetic gas.
Claims (5)
1. a vaporization of liquid oxygen system for coke-stove gas methanol technics, the Kong Fen workshop section in described coke-stove gas methanol technics is communicated with conversion section by oxygen compressor, it is characterized in that: it includes liquid oxygen storage tank and vaporizer; Described liquid oxygen storage tank, vaporizer are communicated with by pipeline successively with the entrance of oxygen compressor; Pipeline between described liquid oxygen storage tank and vaporizer is parallel with pipeline, described vaporizer and the outlet of oxygen compressor that liquid oxygen pump and middle pressure storage tank are formed.
2. the vaporization of liquid oxygen system of coke-stove gas methanol technics according to claim 1, is characterized in that: described vaporizer is water bath type vaporizer.
3. the vaporization of liquid oxygen system of coke-stove gas methanol technics according to claim 1 and 2, is characterized in that: described middle pressure storage tank is with self-supercharging device.
4. the vaporization of liquid oxygen technique of a coke-stove gas methanol technics, adopt the vaporization of liquid oxygen system of any one coke-stove gas methanol technics of claims 1 to 3, it is characterized in that: (1), when space division system oxygen inflate quantity is low, the oxygen that the liquid oxygen in liquid oxygen storage tank generates with Kong Fen workshop section after vaporizer vaporization enters conversion section through oxygen compressor;
(2) when space division system scram or long-term maintenance are stopped, the liquid oxygen in liquid oxygen storage tank through liquid oxygen pump pressure-raising, through in press storage tank to regulate pressure, vaporizer to vaporize after, the outlet of oxygen compressor enters conversion section.
5. the vaporization of liquid oxygen technique of coke-stove gas methanol technics according to claim 4, is characterized in that: the oxygen of described vaporizer vaporization is 0.02 ~ 0.04MPa to the pressure of oxygen compressor entrance, and oxygen compressor is 2.3 ~ 2.6MPa to the pressure of conversion section.
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| CN103423589B true CN103423589B (en) | 2015-03-11 |
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| CN105546340A (en) * | 2015-12-10 | 2016-05-04 | 马鞍山钢铁股份有限公司 | Method and device for preventing moisture leakage of air separation vaporization system |
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| CN101112970A (en) * | 2007-07-04 | 2008-01-30 | 山西科灵催化净化技术发展公司 | Technical method for preparing menthol synthetic gas by coke oven gas conversion without catalytic oxidation |
| CN101244805A (en) * | 2008-03-13 | 2008-08-20 | 四川天一科技股份有限公司 | Method for producing methanol synthesis gas by oven gas non-catalytic pure oxygen-steam conversion |
| CN102079689A (en) * | 2009-11-30 | 2011-06-01 | 四川达兴能源股份有限公司 | Method and equipment for producing methanol |
| CN202188302U (en) * | 2011-06-29 | 2012-04-11 | 济源市金利冶炼有限责任公司 | Loxygen recovery and reuse system for space division machine |
| CN202469471U (en) * | 2012-03-20 | 2012-10-03 | 中煤能源黑龙江煤化工有限公司 | Liquid oxygen system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57122025A (en) * | 1981-01-22 | 1982-07-29 | Nippon Steel Corp | Utilizing method of surplus gas |
| CN103890521A (en) * | 2011-09-15 | 2014-06-25 | 林德股份公司 | Method for obtaining olefins from furnace gases of steel works |
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- 2013-08-27 CN CN201310378084.8A patent/CN103423589B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101112970A (en) * | 2007-07-04 | 2008-01-30 | 山西科灵催化净化技术发展公司 | Technical method for preparing menthol synthetic gas by coke oven gas conversion without catalytic oxidation |
| CN101244805A (en) * | 2008-03-13 | 2008-08-20 | 四川天一科技股份有限公司 | Method for producing methanol synthesis gas by oven gas non-catalytic pure oxygen-steam conversion |
| CN102079689A (en) * | 2009-11-30 | 2011-06-01 | 四川达兴能源股份有限公司 | Method and equipment for producing methanol |
| CN202188302U (en) * | 2011-06-29 | 2012-04-11 | 济源市金利冶炼有限责任公司 | Loxygen recovery and reuse system for space division machine |
| CN202469471U (en) * | 2012-03-20 | 2012-10-03 | 中煤能源黑龙江煤化工有限公司 | Liquid oxygen system |
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