CN104857997A - Reduction method of methanol synthesis catalyst - Google Patents
Reduction method of methanol synthesis catalyst Download PDFInfo
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- CN104857997A CN104857997A CN201510215353.8A CN201510215353A CN104857997A CN 104857997 A CN104857997 A CN 104857997A CN 201510215353 A CN201510215353 A CN 201510215353A CN 104857997 A CN104857997 A CN 104857997A
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- hydrogen
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- methanol synthesis
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Abstract
The invention discloses a reduction method of methanol synthesis catalyst. The reduction method comprises the following steps: conveying hydrogen from a gas storage tank of a hydrogen drainage and irrigation vehicle to a hydrogen depressurizing valve of the hydrogen drainage and irrigation vehicle to depressurize; conveying hydrogen after the depressurizing treatment to a synthesis gas compressor through a general hydrogen supplementing pipe to boost; conveying the synthesis circular gas containing hydrogen and nitrogen to a nitrogen inlet of the synthesis gas compressor so as to mix with the hydrogen after the boosting treatment, wherein the volume percent of every component in the synthesis circular gas is: 0.3-0.5% of hydrogen and 99.5-99.7% of nitrogen; conveying the mixed gas to a catalyst bed layer of a methanol synthesis reactor through a gas conveying pipe to participate in the reduction reaction. By adopting the technical scheme of the invention, the reduction reaction speed is accelerated, the reaction time is saved, and working efficiency is improved; the system is completely and stably ran without a series of assistant systems and the gas required by reduction is supplied, and thus cost is saved.
Description
Technical field
The present invention relates to industrial catalyst reduction technique field, particularly the method for reducing of methanol synthesis catalyst.
Background technology
In traditional handicraft, the methanol synthesis catalyst of new filling must expend 80 hours after system cloud gray model carry out heating reduction after just can possess service condition, thus have impact on industrial efficiency, delayed the progress of work, extended the working time.
According to former design, what the industrial reduction of methanol synthesis catalyst adopted is transform throw oxygen after the self-produced reformed gas of system carry out the scheme of reducing.But, the program requires that the accessory system normal table such as space division system, synthesic gas compressor, thick desulfurization, fine de-sulfur, conversion system, heating furnace runs to supply gas required when catalyst for methanol reduces, but consider that catalyst for methanol reduction time institute's air demand is less, if startup foregoing sequence device supplies the gas needed for catalyst reduction during reduction, then system cloud gray model expense is too high, wastes cost.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind ofly to increase work efficiency, the industrial reduction method of cost-saving methanol synthesis catalyst.
For achieving the above object, the invention provides following technical scheme: a kind of method of reducing of methanol synthesis catalyst, comprises the following steps:
(1) hydrogen is transported to the hydrogen reducer unit of hydrogen drainage and irrigation vehicle from the air accumulator of hydrogen drainage and irrigation vehicle reduces pressure;
(2) hydrogen after reduced pressure treatment is filled into house steward by hydrogen to be transported in synthesic gas compressor and to boost;
(3) synthetic cyclic gas containing hydrogen and nitrogen is transported in the nitrogen inlet of synthesic gas compressor with through the hydrogen processed that boosts and mixes, in synthetic cyclic gas, the percent by volume ratio of each component is: hydrogen: 0.3-0.5%, nitrogen 99.5-99.7%;
(4) mixed gas is transported to by appendix and participates in reduction reaction in the beds of methanol synthesis reactor and carry out reduction reaction.
Preferably, hydrogen reducer unit sidewall connects steam pipework, the other end of steam pipework connects vapor can.
Preferably, the sidewall that hydrogen fills into house steward is provided with valve one.
Preferably, the sidewall of steam pipework is provided with valve two.
The beneficial effect of above technical scheme is adopted to be: to be transported to the hydrogen reducer unit of hydrogen drainage and irrigation vehicle from the air accumulator of hydrogen drainage and irrigation vehicle by hydrogen and to reduce pressure, afterwards the hydrogen after reduced pressure treatment is filled into house steward by hydrogen to be transported in synthesic gas compressor and to boost, again the synthetic cyclic gas containing hydrogen and nitrogen is transported in the nitrogen inlet of synthesic gas compressor with through the hydrogen processed that boosts and mixes, finally mixed gas is transported to by appendix and participates in reduction reaction in the beds of methanol synthesis reactor and carry out reduction reaction, eliminate the system reducing pipeline in former design and the gate valve on sidewall thereof, directly will to be filled into house steward by hydrogen through the post-decompression hydrogen of hydrogen reducer unit to be transported in synthesic gas compressor and to mix with synthetic cyclic gas after boosting, finally be transported in the beds of methanol synthesis reactor and participate in reduction reaction, reduction reaction speed can be accelerated, save the reduction reaction time, effectively improve operating efficiency, accelerate the progress of work, save the working time.And, adopt above-mentioned method of reducing, gas required when not needing the whole stable operation of accessory system such as space division system, synthesic gas compressor, thick desulfurization, fine de-sulfur, conversion system, heating furnace to reduce to supply, greatly reduces system cloud gray model expense, has effectively saved cost.In synthetic cyclic gas, the percent by volume ratio of each component is: hydrogen: 0.3-0.5%, and nitrogen 99.5-99.7% can accelerate reduction reaction speed, saves the reduction reaction time, effectively improves operating efficiency, accelerate the progress of work, saved the working time.Hydrogen reducer unit sidewall connects steam pipework, the other end of steam pipework connects vapor can, hydrogen decompression belongs to gas expansion endothermic process, after decompression, temperature reduces, and the water vapor condensation in environment is attached on the pipeline after hydrogen reducer unit, likely freezes and affects operating efficiency, steam in vapor can is transported in hydrogen reducer unit by steam pipework, heat can be provided to hydrogen reducer unit in time, avoid freezing, improve operating efficiency.The sidewall that hydrogen fills into house steward is provided with valve one, and operating personnel open valve one and hydrogen can be filled into house steward by hydrogen and be transported to and enter in synthesic gas compressor, and valve-off one can prevent hydrogen leak, improves operating efficiency, has saved cost.The sidewall of steam pipework is provided with valve two, and operating personnel open valve two and steam can be transported to by steam pipework and enter in hydrogen reducer unit, and valve-off two can prevent steam leakage, improves operating efficiency, has saved cost.
Accompanying drawing explanation
Fig. 1 is the pipeline equipment structural representation in the method for reducing of a kind of methanol synthesis catalyst of the present invention.
Be labeled as in figure: 1, air accumulator; 2, hydrogen reducer unit; 3, hydrogen fills into house steward; 4, synthesic gas compressor; 5, nitrogen inlet; 6, appendix; 7, methanol synthesis reactor; 8, system reducing pipeline; 9, gate valve; 10, steam pipework; 11, vapor can; 12, valve one; 13, valve two.
Detailed description of the invention
The preferred embodiment of the method for reducing of a kind of methanol synthesis catalyst of the present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 shows the detailed description of the invention of the method for reducing of a kind of methanol synthesis catalyst of the present invention: the method for reducing of this methanol synthesis catalyst, comprises the following steps:
(1) hydrogen is transported to the hydrogen reducer unit 2 of hydrogen drainage and irrigation vehicle from the air accumulator 1 of hydrogen drainage and irrigation vehicle reduces pressure;
(2) hydrogen after reduced pressure treatment is filled into house steward 3 by hydrogen to be transported in synthesic gas compressor 4 and to boost;
(3) synthetic cyclic gas containing hydrogen and nitrogen is transported in the nitrogen inlet 5 of synthesic gas compressor 4 with through the hydrogen processed that boosts and mixes, in synthetic cyclic gas, the percent by volume ratio of each component is: hydrogen: 0.3-0.5%, nitrogen 99.5-99.7%.
(4) mixed gas is transported to by appendix 6 and participates in reduction reaction in the beds of methanol synthesis reactor 7 and carry out reduction reaction.
Hydrogen is transported to the hydrogen reducer unit 2 of hydrogen drainage and irrigation vehicle from the air accumulator 1 of hydrogen drainage and irrigation vehicle and reduces pressure, afterwards the hydrogen after reduced pressure treatment is filled into house steward 3 by hydrogen to be transported in synthesic gas compressor 4 and to boost, again the synthetic cyclic gas containing hydrogen and nitrogen is transported in the nitrogen inlet 5 of synthesic gas compressor 4 with through the hydrogen processed that boosts and mixes, finally mixed gas is transported to by appendix 6 in the beds of methanol synthesis reactor 7 and participates in reduction reaction, eliminate the system reducing pipeline 8 in former design and the gate valve 9 on sidewall thereof, directly will to be filled into house steward 3 by hydrogen through the post-decompression hydrogen of hydrogen reducer unit 2 to be transported in synthesic gas compressor 4 and to mix with synthetic cyclic gas after boosting, finally be transported in the beds of methanol synthesis reactor 7 and participate in reduction reaction, reduction reaction speed can be accelerated, save the reduction reaction time, effectively improve operating efficiency, accelerate the progress of work, save the working time.And, adopt above-mentioned method of reducing, gas required when not needing the whole stable operation of accessory system such as space division system, synthesic gas compressor 4, thick desulfurization, fine de-sulfur, conversion system, heating furnace to reduce to supply, greatly reduces system cloud gray model expense, has effectively saved cost.
In synthetic cyclic gas, the percent by volume ratio of each component is: hydrogen: 0.3-0.5%, nitrogen 99.5-99.7%.
Through test of many times, test data sees the following form, subjects is the reduction reaction participating in catalyst after mixing with the hydrogen processed through boosting, compared with using the reduction reaction time of conventional nitrogen (nitrogen content 100%), when using the synthetic cyclic gas in embodiment: hydrogen 0.3-0.5%, during nitrogen 99.5-99.7%, enough accelerate reduction reaction speed, save the reduction reaction time; When in each component of synthetic cyclic gas, the percentage by weight of hydrogen is 0.5%, and when the percentage by weight of nitrogen is 99.5%, the reaction time of carrying out reduction reaction is the shortest, is most preferred embodiment.
Hydrogen reducer unit 2 sidewall connects steam pipework 10, the other end of steam pipework 10 connects vapor can 11, hydrogen decompression belongs to gas expansion endothermic process, after decompression, temperature reduces, and the water vapor condensation in environment is attached on the pipeline after hydrogen reducer unit 2, likely freezes and affects operating efficiency, steam in vapor can 11 is transported in hydrogen reducer unit 2 by steam pipework 10, heat can be provided to hydrogen reducer unit 2 in time, avoid freezing, improve operating efficiency.
The sidewall that hydrogen fills into house steward 3 is provided with valve 1, operating personnel open valve 1 and hydrogen can be filled into house steward 3 by hydrogen and be transported to and enter in synthesic gas compressor 4, valve-off 1 can prevent hydrogen leak, improves operating efficiency, has saved cost.
The sidewall of steam pipework 10 is provided with valve 2 13, and operating personnel open valve 2 13 and steam can be transported to by steam pipework 10 and enter in hydrogen reducer unit 2, and valve-off 2 13 can prevent steam leakage, improves operating efficiency, has saved cost.
Pressure before hydrogen decompression is 1-20MPa, and post-decompression pressure is 0.5-1.5MPa.
Pressure after hydrogen boosts in synthesic gas compressor 4 is 5-20MPa.
The catalyst model specification used in the present invention is RK-05, is of a size of 5x5mm.
The purity of the hydrogen used in the present invention is greater than 99.9%, and the total sulfur content in hydrogen is less than 0.05PPm, and the oxygen content in hydrogen is less than 0.1%, and the ammonia level in hydrogen is less than 10 × 10
-6, unsaturated hydrocarbons trace in hydrogen, and the material not making catalyst poisoning containing chlorine and heavy metal etc.
The charge pressure of the air accumulator 1 of the hydrogen row tank car used in the present invention is 18MPa, and system pressure is 1Mpa.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (4)
1. a method of reducing for methanol synthesis catalyst, comprises the following steps:
(1) hydrogen is transported to the hydrogen reducer unit of hydrogen drainage and irrigation vehicle from the air accumulator of hydrogen drainage and irrigation vehicle reduces pressure;
(2) hydrogen after reduced pressure treatment is filled into house steward by hydrogen to be transported in synthesic gas compressor and to boost;
(3) synthetic cyclic gas containing hydrogen and nitrogen is transported in the nitrogen inlet of synthesic gas compressor with through the hydrogen processed that boosts and mixes, in synthetic cyclic gas, the percent by volume ratio of each component is: hydrogen: 0.3-0.5%, nitrogen 99.5-99.7%;
(4) mixed gas is transported to by appendix in the beds of methanol synthesis reactor and participates in reduction reaction.
2. the method for reducing of methanol synthesis catalyst according to claim 1, is characterized in that: described hydrogen reducer unit sidewall connects steam pipework, and the other end of steam pipework connects vapor can.
3. the method for reducing of methanol synthesis catalyst according to claim 2, is characterized in that: the sidewall that described hydrogen fills into house steward is provided with valve one.
4. the method for reducing of methanol synthesis catalyst according to claim 3, is characterized in that: the sidewall of described steam pipework is provided with valve two.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510215353.8A CN104857997A (en) | 2015-04-30 | 2015-04-30 | Reduction method of methanol synthesis catalyst |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510215353.8A CN104857997A (en) | 2015-04-30 | 2015-04-30 | Reduction method of methanol synthesis catalyst |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310004A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Method for reducing cobalt-base Fischer Tropsch synthesis catalyst |
| CN102802783A (en) * | 2009-06-17 | 2012-11-28 | 约翰森·马瑟公开有限公司 | Methanol synthesis process |
| CN103476493A (en) * | 2011-04-01 | 2013-12-25 | 陶氏环球技术有限责任公司 | Catalysts for the conversion of synthesis gas to alcohols |
| CN103977843A (en) * | 2014-05-27 | 2014-08-13 | 山西兰花科技创业股份有限公司 | Methanol catalyst temperature-rising reduction method |
-
2015
- 2015-04-30 CN CN201510215353.8A patent/CN104857997A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802783A (en) * | 2009-06-17 | 2012-11-28 | 约翰森·马瑟公开有限公司 | Methanol synthesis process |
| CN102310004A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Method for reducing cobalt-base Fischer Tropsch synthesis catalyst |
| CN103476493A (en) * | 2011-04-01 | 2013-12-25 | 陶氏环球技术有限责任公司 | Catalysts for the conversion of synthesis gas to alcohols |
| CN103977843A (en) * | 2014-05-27 | 2014-08-13 | 山西兰花科技创业股份有限公司 | Methanol catalyst temperature-rising reduction method |
Non-Patent Citations (1)
| Title |
|---|
| 胡毅: "外购氢气进行甲醇催化剂还原技术的研究及应用", 《中氮肥》 * |
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Application publication date: 20150826 |