Method for producing alcohol ether fuel from hydrogen prepared from coke oven gas and synthesis gas prepared from scorched particles

A coke oven gas and synthesis gas technology, applied in the direction of fuel, liquid carbon-containing fuel, chemical instruments and methods, etc., can solve the problems of wasting resources, polluting the environment, etc., and achieve the effects of ensuring comprehensive utilization, efficient operation, and cost reduction

Inactive Publication Date: 2008-02-20

TOWN STAR IND +1

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Problems solved by technology

[0006] In order to overcome the shortcomings of the above-mentioned existing traditional technology, the present invention recycles and comprehensively utilizes excess coke oven gas, solves the problem of wasting resources and pollutes the environment afte...

Abstract

The invention discloses a manufacturing method of alcohol ether fuel which is produced by synthesis gas while the synthesis gas is produced by hydrogen and scorched particles collaboratively, and the hydrogen and scorched particles are made by coke-oven gas. The method comprises the processes of gas making, rough decoking, fine decoking, pretreatment of coke-oven gas, adsorption and extraction of hydrogen through transformation, methyl alcohol synthesis and methyl alcohol rectification, the alcohol ether fuel is made after the processes. The invention makes use of abandoned scorched particles to prepare water gas and takes advantage of PSA technique to extract hydrogen in coke-oven gas, and alcohol ether fuel is synthesized after adding water gas. Furthermore, the rest materials with higher thermal value are returned to a coke oven to be used as fuel, thus, coke-oven gas firstly is avoided to be blown down and environment pollution and resource waste are reduced; secondly, a single transforming process for preparing methyl alcohol by coke-oven gas, equipment investment and operation risk are avoided; thirdly, the processes of carbon monoxide conversion and decarburization are reduced so as to ensure the integrative use of carbon resources in the system, pyrogenic gas is used rationally and effectively and cost and operation difficulty of methyl alcohol is reduced so as to guarantee the continuous and steady run of system and realizing a plurality of advantages of environmental improvement, rational use of resources, reduction of cost, reduction of working procedure.

Application Domain

Organic compound preparationHydroxy compound preparation +1

Technology Topic

ChemistryEther +13

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[0025] In the following, the present invention will be further described in detail with embodiments in conjunction with the accompanying drawings. The specific process steps are carried out in the following order:

[0026] The first step is to make gas: the coke is sent to each furnace silo by the conveyor belt, and is fed into the gasification furnace by the automatic coking machine to carry out the gasification reaction, and the coking is completed in the downward blowing stage. The gasification process includes six stages of the cycle of blowing, steam blowing, upward blowing, downward blowing, secondary steam upward blowing and air blowing. The blowing air in the gasification process is sent to the three-waste boiler to recover heat after passing through the cyclone dust collector; the produced water gas passes through the gas dust collector, then enters the heat pipe waste heat boiler to recover the waste heat, and then enters the scrubber to wash and remove the dust, and then send it to the scrubber after it is cooled to below 40°C. To the gas tank, the composition of each component is as follows:

[0027] Component

[0028] The second step, the rough desulfurization process: the water gas from the gas tank first enters the electrostatic precipitator through the inlet water seal to remove dust and tar, and then passes through the outlet water seal and is pressurized to 0.059Mpa by the Roots blower, and enters the bottom of the water gas desulfurization tower. The desulfurization lean liquid sprayed from the top of the desulfurization tower is in reverse contact to remove most of the hydrogen sulfide and part of the organic sulfur. Purified gas from the tower (H 2 S≤50mg/Nm) decompression process, the water gas composition after crude desulfurization is as follows:

[0029] Component

[0030] The third step is the refined desulfurization process: the water gas after rough desulfurization and compression is firstly hydrogenated and added with a cobalt and molybdenum catalyst to convert most of the organic sulfur into inorganic sulfur (H 2 S), the generated H 2 S is removed by wet desulfurization. Unremoved H 2 S enters the crude desulfurizer, through the activated carbon 2 S is adsorbed. The gas from the coarse desulfurizer directly enters the fine desulfurizer to remove trace H 2 S, make the sulfur content in the gas ≤0.1ppm.

[0031]The fourth step, coke oven gas pretreatment and pressure swing adsorption hydrogen extraction process: the gas from the original coke oven system enters four parallel crude naphthalene removers to remove most of the naphthalene and part of sulfur, benzene, hydrogen cyanide, And the ammonia enters the first stage of the compressor, after being compressed to 0.2Mpa, it enters two fine naphthalene removers that can be operated in series and parallel to further remove the naphthalene and part of sulfur, benzene, hydrogen cyanide, ammonia and tar, and then send it to Compressor II stage, after being compressed to 0.9Mpa, it enters two deoilers that can be operated in series and parallel to remove oil, and then it is sent to the pressure swing adsorption system. The adsorbent is selective for gas adsorption, that is, different gases (adsorption Qualitative) The adsorption capacity on the adsorbent is different and the adsorption capacity of a specific gas on the adsorbent changes with pressure. The pressure adsorption of N in the raw gas 2 , CH 4 , CO, CO 2 The components that are not easily adsorbed, such as hydrogen and oxygen, are discharged from the top of the adsorber through the adsorption bed, so as to achieve the purpose of extracting hydrogen from the coke oven gas. Then by reducing the pressure of the adsorbent bed, the adsorbed impurity components are desorbed and desorbed, and the adsorbent is regenerated. The composition of the hydrogen extracted from the coke oven gas is as follows:

[0032] Component

[0033] The composition of the desorption gas after hydrogen extraction from the coke oven gas is as follows:

[0034] Component

[0035] The fifth step, methanol synthesis: at a pressure of 5.4MPa, a temperature of 190℃~290℃, and the role of a copper-zinc catalyst, H 2 And CO, CO 2 Reaction to generate CH 3 OH.

[0036] 2H 2 +CO=CH 3 OH+90.73KJ/mol

[0037] 3H 2 +CO 2 =CH 3 OH+H 2 O+48.02KJ/mol

[0038] The sixth step, methanol distillation: use energy-saving three-column continuous distillation process to obtain products. In the pre-distillation column, carbon monoxide, hydrogen, and dimethyl ether, which are low boilers, are removed from the top of the column. In the atmospheric column, fusel alcohols such as ethanol and propanol, which are high boilers, are removed from the bottom. The product refined methanol is obtained from the top of the pressure column.

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Classification and recommendation of technical efficacy words

Reduce pollution and waste of resources

Integrated oil-water separation oil removal equipment

ActiveCN105692786AEasy to handle with light weightReduce pollution and waste of resources

Owner:中科沃德利华(北京)生态环保科技有限公司

Method for producing alcohol ether fuel from hydrogen prepared from coke oven gas and synthesis gas prepared from scorched particles

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Description & Claims & Application Information

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