CN105253899A - Coke oven coat gas comprehensive utilization method - Google Patents
Coke oven coat gas comprehensive utilization method Download PDFInfo
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- CN105253899A CN105253899A CN201410335236.0A CN201410335236A CN105253899A CN 105253899 A CN105253899 A CN 105253899A CN 201410335236 A CN201410335236 A CN 201410335236A CN 105253899 A CN105253899 A CN 105253899A
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- gas
- coke
- methane
- comprehensive utilization
- hydrogen
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Abstract
The present invention discloses a coke oven coat gas comprehensive utilization method, which comprises that: coke oven coal gas is subjected to temperature swing adsorption (TSA), fine desulfurization and pressure swing adsorption (PSA) to extract hydrogen so as to form two gases such as a high hydrogen content gas and a desorbing gas with a methane content of 50%; nitrogen gas is supplemented for the high hydrogen content gas, and methanation purification and deammoniation synthesis are performed to generate a product liquid ammonia under conditions such as catalysis, high temperature and high pressure; and the desorbing gas is conveyed into a methane liquefaction system and is compressed to achieve 2.5 MPa, and then methane synthesis, decarbonization, dehydration purification, and cryogenic separation are performed so as to finally form the liquefied methane (LNG) product. With the scheme of the present invention, the coke oven coal gas can be subjected to comprehensive utilization to obtain the two products.
Description
Technical field
The invention belongs to a kind of coke-oven gas method of comprehensive utilization.
Background technology
Coke-oven gas, also known as coke(oven)gas, because combustiblecomponents is many, belongs to high heating value gas.Refer to and be mixed with coking coal with several bituminous coal, in pit kiln after high temperature carbonization, a kind of inflammable gas produced while output coke and tar products is the byproduct of coking industry, and generally as fuel, added value of product is low.Coke(oven)gas is mixture, and its productive rate and composition be difference to some extent because coking coal quality is different with coking condition, and general dry coal per ton can produce coke(oven)gas 300 ~ 350m
3(standard state).Its main component is hydrogen (55% ~ 60%) and methane (23% ~ 27%), in addition also containing a small amount of carbon monoxide (5% ~ 8%), more than C2 unsaturated hydrocarbons (2% ~ 4%), carbonic acid gas (1.5% ~ 3%), oxygen (0.3% ~ 0.8%), nitrogen (3% ~ 7%).Wherein hydrogen, methane, carbon monoxide, more than C2 unsaturated hydrocarbons are combustibleconstituents, and carbonic acid gas, nitrogen, oxygen are non-combustible component.
The feature of coke-oven gas:
1, the high 16720-18810kJ/m of coke-oven gas calorific value
3, combustiblecomponents higher (about about 90%);
2, coke-oven gas is colourless gas frowzy;
3, coke-oven gas is because of containing CO and a small amount of H
2s and poisonous;
4, coke-oven gas is hydrogeneous many, and combustionvelocity is fast, and flame is shorter;
If 5, coke-oven gas purifies bad, by containing more tar and naphthalene, will blocking pipe and pipe fitting, give and adjust firer to bring difficulty;
6, kindling temperature is 600 ~ 650 DEG C.
7, coke-oven gas density is 0.45 ~ 0.50Kg/Nm
3.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of coke-oven gas method of comprehensive utilization.
It is as follows that the present invention solves the problems of the technologies described above taked technical scheme:
A kind of coke-oven gas method of comprehensive utilization, comprising:
Coke-oven gas is forced into 0.05MPa by step 1), by Temp .-changing adsorption operation, removes oxious component tar, benzene, naphthalene, the sulphur in coke-oven gas.
Step 2) compressor pressurizes is sent into 0.8MPa to above-mentioned gas, first carry out fine de-sulfur, then enter pressure-variable adsorption, hydrogen is wherein put forward, formed high hydrogen-containing gas and methane content ~ 50% two kinds of gases of resolution gas;
Step 3) adds nitrogen to high hydrogen-containing gas, through methanation purification, and sends into compressor pressurizes and enters ammonia synthesis operation to 22MPa, make hydrogen and nitrogen synthesize liquefied ammonia under katalysis.
Resolution gas is sent into compressor pressurizes to 2.5MPa by step 4), through methane synthesis, decarburization, dehydration and purification, low temperature separation process, finally forms liquefied methane.
Further, preferably, in step 3) step 4), after pressure-variable adsorption, hydrogen and resolution gas pressurizeed respectively simultaneously, purify and obtain two products.
After have employed such scheme, can fully utilize coke-oven gas, thus carry hydrogen synthetic ammonia by Temp .-changing adsorption, pressure-variable adsorption and form liquefied methane, make it reach the object of multi-product waste gas comprehensive utilization.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification sheets, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification sheets, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in detail, to make above-mentioned advantage of the present invention definitely.
Accompanying drawing is the schematic flow sheet of coke-oven gas method of comprehensive utilization of the present invention.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how utilisation technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
Specifically, as shown in the figure, a kind of coke-oven gas method of comprehensive utilization, comprising:
Coke-oven gas is forced into 0.05MPa, by Temp .-changing adsorption operation, removes oxious component tar, benzene, naphthalene, the sulphur in coke-oven gas.
Compressor pressurizes is sent into 0.8MPa to above-mentioned gas, first carries out fine de-sulfur, then enter pressure-variable adsorption hydrogen is wherein put forward, the resolution gas of obtained high hydrogen-containing gas and methane content ~ 50%.
Nitrogen is added to high hydrogen-containing gas, through methanation purification, and sends into compressor pressurizes and enter ammonia synthesis operation to 22MPa, make hydrogen and nitrogen synthesize liquefied ammonia product under catalysis, high temperature, High Pressure.
In addition, resolution gas is sent into compressor pressurizes to 2.5MPa, through methane synthesis, refining decarburization, the dehydration and purification removal of impurity, through low temperature separation process, final formation liquefied methane product (LNG).
Further, preferably, in fine de-sulfur, the total sulfur in temperature swing adsorption gas is removed to 0.1mg/Nm
3below.
Further, preferably, in step 3), in ammonia synthesis operation, under the catalysis of iron cobalt system, synthetic ammonia (3H is produced
2+ N
2=2NH
3+ Q).
Further, preferably, the isolated ammonia of ammonia synthesis operation is decompressed to 1.6MPa and delivers to the storage of ammonia storehouse.
Further, preferably, dropping a hint and the waste gas of ammonia groove periodic off-gases after the ammonia in ammonia recovery unit gas recovery of ammonia synthesis operation, enters resolution gas house steward and uses.
Further, preferably, resolution gas, through methane synthesis, refining decarburization, dehydration and purification, removes the impurity such as a small amount of carbon monoxide, carbonic acid gas, moisture.
Further, preferred method is, described low temperature separation process step, comprising: freezing, decompression, swell refrigeration, liquefaction are separated.
In one embodiment, main method comprises:
When ammonia synthesis, the high hydrogen-containing gas come by Pressure Swing Adsorption workshop section, enters methanation furnace (CO+CO after interchanger heat exchange
2≤ 0.4%), certain temperature, pressure and methanation catalyst exist under with H-H reaction, change into be easy to remove water and methane, to remove a small amount of CO and CO
2, use CO+CO in operation fine gas
2≤ 10ppm, thus protection ammonia synthesis catalyst.
After have employed such scheme, it can fully utilize coke-oven gas, thus carries hydrogen synthetic ammonia by Temp .-changing adsorption, pressure-variable adsorption and form liquefied methane.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a coke-oven gas method of comprehensive utilization, is characterized in that, comprising:
Coke-oven gas is forced into 0.05MPa by step 1), by Temp .-changing adsorption operation, removes oxious component tar, benzene, naphthalene, the sulphur in coke-oven gas;
Step 2) compressor pressurizes is sent into 0.8MPa to above-mentioned gas, first carry out fine de-sulfur, then enter pressure-variable adsorption hydrogen is wherein put forward, formed high hydrogen-containing gas and methane content ~ 50% resolution gas;
Step 3) adds nitrogen to high hydrogen-containing gas, through methanation purification, and sends into compressor pressurizes and enters ammonia synthesis operation to 22MPa, make hydrogen and nitrogen synthesize liquefied ammonia under high temperature, katalysis;
Resolution gas is sent into compressor pressurizes to 2.5MPa by step 4), through methane synthesis, decarburization, dehydration and purification, low temperature separation process, finally forms liquefied methane (LNG).
2. coke-oven gas method of comprehensive utilization according to claim 1, is characterized in that, adds nitrogen in described high hydrogen, carries out methanation and refines, and finally make hydrogen, nitrogen synthesize liquefied ammonia under high temperature, katalysis to it.
3. coke-oven gas method of comprehensive utilization according to claim 1, is characterized in that, resolution gas, through methane synthesis, decarburization, dehydration and purification, low temperature separation process, finally forms liquefied methane product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335236.0A CN105253899A (en) | 2014-07-15 | 2014-07-15 | Coke oven coat gas comprehensive utilization method |
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|---|---|---|---|
| CN201410335236.0A CN105253899A (en) | 2014-07-15 | 2014-07-15 | Coke oven coat gas comprehensive utilization method |
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| CN105253899A true CN105253899A (en) | 2016-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902614A (en) * | 2017-03-27 | 2017-06-30 | 山东钢铁集团日照有限公司 | A kind of method of organic sulfur in removing coke-stove gas |
| CN110127613A (en) * | 2019-05-20 | 2019-08-16 | 广东国能中林实业有限公司 | A kind of efficiently advanced hydrogen production from coke oven gas technique |
| CN112126480A (en) * | 2020-09-02 | 2020-12-25 | 山东钢铁集团日照有限公司 | Method for preparing LNG (liquefied Natural gas) and high-quality liquid ammonia from coke oven gas |
| CN113666386A (en) * | 2021-08-26 | 2021-11-19 | 宁波中科远东催化工程技术有限公司 | Method for synthesizing ammonia from coke oven gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323799A (en) * | 2008-07-29 | 2008-12-17 | 四川天一科技股份有限公司 | Coke oven gas dry cleaning temperature swing adsorption process |
| CN102517108A (en) * | 2011-12-15 | 2012-06-27 | 西南化工研究设计院 | Technology for preparing liquefied natural gas and liquid ammonia by using coke oven gas |
-
2014
- 2014-07-15 CN CN201410335236.0A patent/CN105253899A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323799A (en) * | 2008-07-29 | 2008-12-17 | 四川天一科技股份有限公司 | Coke oven gas dry cleaning temperature swing adsorption process |
| CN102517108A (en) * | 2011-12-15 | 2012-06-27 | 西南化工研究设计院 | Technology for preparing liquefied natural gas and liquid ammonia by using coke oven gas |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902614A (en) * | 2017-03-27 | 2017-06-30 | 山东钢铁集团日照有限公司 | A kind of method of organic sulfur in removing coke-stove gas |
| CN106902614B (en) * | 2017-03-27 | 2019-10-18 | 山东钢铁集团日照有限公司 | A kind of method of organic sulfur in removing coke-stove gas |
| CN110127613A (en) * | 2019-05-20 | 2019-08-16 | 广东国能中林实业有限公司 | A kind of efficiently advanced hydrogen production from coke oven gas technique |
| CN112126480A (en) * | 2020-09-02 | 2020-12-25 | 山东钢铁集团日照有限公司 | Method for preparing LNG (liquefied Natural gas) and high-quality liquid ammonia from coke oven gas |
| CN113666386A (en) * | 2021-08-26 | 2021-11-19 | 宁波中科远东催化工程技术有限公司 | Method for synthesizing ammonia from coke oven gas |
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Application publication date: 20160120 |