CN102530862B - Carbon monoxide conversion method for ammonia synthesis - Google Patents
Carbon monoxide conversion method for ammonia synthesis Download PDFInfo
- Publication number
- CN102530862B CN102530862B CN2012100636431A CN201210063643A CN102530862B CN 102530862 B CN102530862 B CN 102530862B CN 2012100636431 A CN2012100636431 A CN 2012100636431A CN 201210063643 A CN201210063643 A CN 201210063643A CN 102530862 B CN102530862 B CN 102530862B
- Authority
- CN
- China
- Prior art keywords
- water
- gas
- carbon monoxide
- temperature
- conversion gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Catalysts (AREA)
- Industrial Gases (AREA)
Abstract
The invention discloses a carbon monoxide conversion method for ammonia synthesis. The method comprises the following steps of: 1) mixing semi-water gas and water vapor, and preheating to 290 to 310 DEG C; 2) reacting the preheated mixed gas at the first section of a medium frequency shift furnace under the catalytic action of accelerant to obtain conversion gas containing 12 to 15 percent of carbon monoxide; 3) adjusting temperature of the conversion gas containing 12 to 15 percent of carbon monoxide to be 280 to 320 DEG C, reacting at the second section of the medium frequency shift furnace under the catalytic action of accelerant to obtain conversion gas containing 8 to 10 percent of carbon monoxide; and 4) allowing the conversion gas containing 8 to 10 percent of carbon monoxide to enter a low frequency shift furnace, and reacting to obtain conversion gas containing 5 to 7 percent of carbon monoxide. Temperature greatly influences the speed of conversion reaction, the influence of the temperature on the speed of the conversion reaction is different from that of the temperature on forward and reverse reaction. Therefore, according to the method, temperature is adjusted at different reaction stages, so conversion rate can be improved.
Description
Technical field
The invention belongs to chemical production technical field, relate in particular to a kind of carbon monoxide for synthesizing ammonia transform method.
Background technology
In the semi-water gas after desulfurization, except containing synthetic ammonia required hydrogen and nitrogen, also contain a large amount of carbon monoxide and other gases.Carbon monoxide can make the ammonia synthesis catalyst reversible poisoning, must be removed.
Conversion process in synthetic ammonia needs and will under certain temperature and pressure, by means of the effect of catalyzer, make steam and CO reaction from the semi-water gas of two sections of compressions, generates CO
2And H
2, make qualified conversion gas, and the heat in reasonable recovery system.For making in maximum efficiency qualified conversion gas, reduce the cost, need the strict technical process of controlling.
Summary of the invention
The purpose of this invention is to provide a kind of carbon monoxide for synthesizing ammonia transform method, can reduce the consumption of steam, improve the quality of conversion gas.
Technical scheme of the present invention is: a kind of carbon monoxide for synthesizing ammonia transform method comprises the steps:
1) semi-water gas be preheating to 290～310 ℃ after water vapor mixes;
2) gas mixture after preheating in one section, middle change stove under the catalyst katalysis reaction obtain to contain the conversion gas of 12～15% carbon monoxide;
3) the conversion gas regulation temperature that contains 12～15% carbon monoxide after 280-320 ℃ in two sections, middle change stove under the catalyst katalysis reaction obtain to contain the conversion gas of 8～10% carbon monoxide;
4) the conversion gas that contains 8～10% carbon monoxide enters the low conversion gas that the stove reaction obtains to contain 5～7% carbon monoxide that becomes.
Described semi-water gas with temperature is brought up to 110～125 ℃ before water vapor mixes in saturator.
The preheating of the gas mixture of described semi-water gas and water vapor is to be undertaken by the mode of carrying out heat exchange with the conversion gas of middle change outlet of still in heat exchanger.Adopt the mode of gas mixture and the heat exchange of middle change outlet of still conversion gas, the energy is fully utilized.
Enter the low stove that becomes enter one section thermosistor cooling after the described conversion gas that contains 8～10% carbon monoxide is lowered the temperature in heat exchanger after.
Enter low one section, the stove that becomes after the described conversion gas temperature that contains 8～10% carbon monoxide reaches 280-300 ℃ and react under the catalyst katalysis, reacted gas reacts under the catalyst katalysis through entering low two sections, the stove that becomes after two sections thermosistor temperature adjustments again.
Enter described semi-water gas first cools to 60～70 ℃ before entering saturator after and filter through carbon filter again after coke filter separates greasy dirt.
Sending into compression three after described low change stove conversion gas is out lowered the temperature through step advances.
Described step cool-down method is:
A, conversion gas enter water thermosistor recovery waste heat;
The conversion gas of B, recovery waste heat enters hot-water tower bottom recovered steam and sensible heat;
C, the conversion gas that has reclaimed steam and sensible heat enter the hot water preheater and further lower the temperature;
D, enter water recirculator from hot water preheater conversion gas out and lower the temperature at last.
The method of temperature control of described one section thermosistor, two sections thermosistors and water thermosistor is that the temperature adjustment step is take water as the temperature adjustment of heat exchange medium:
The water of A, hot-water tower enters water thermosistor and the low conversion gas converting heat that becomes the generation of stove second-stage reaction;
B, A step water out enter two sections thermosistors and absorb the low heat that becomes the conversion gas of stove one section outlet;
C, two sections thermosistors water out enter one section thermosistor and heat exchanger outlet gas converting heat;
D, one section thermosistor hot water out enter the saturator top spray and under, with the semi-water gas counter current contact;
E, saturator hot water is out got back to hot-water tower and is recycled.
The carbon monodixe conversion reaction is under certain condition, and the carbon monoxide in semi-water gas and steam reaction generate the technological process of hydrogen and carbonic acid gas.
Temperature is larger to the rate of transformationreation, and the impact that aligns reversed reaction speed is different.Temperature raises, and above-mentioned transformationreation (thermopositive reaction) speed increases slowly, and reversed reaction (thermo-negative reaction) speed increases soon.Therefore, when transformationreation began, reactant concn was large, improved temperature, can accelerate transformationreation; In the latter half of reaction, the concentration of carbonic acid gas and hydrogen increases, and reversed reaction speed is accelerated, and therefore, must reduce temperature of reaction, and reversed reaction speed is slowed down.The present invention can improve interconversion rate by carry out the adjusting of temperature in the differential responses stage.
In addition, by the temperature adjusting of conversion gas, method of the present invention makes all efficient recovery and the utilizations of heat energy in the technical process process, has reduced production cost, has reduced energy dissipation.
Description of drawings
Fig. 1 is the schema of carbon monodixe conversion method of the present invention.
Embodiment
as shown in Figure 1, a kind of carbon monoxide for synthesizing ammonia transform method, specific as follows: as to enter coke filter 2 after two sections thermosistors of semi-water gas (90 ℃) process conversion, 1 cooling (60～70 ℃) from the compression second stage exit and separate greasy dirts, again from coke filter 2 sidepieces out enter saturator 3 at 3 ends of saturator and spray and under the hot water counter current contact, gas temperature is brought up to 110～125 ℃ of left and right, out enter from saturator 3 tops steam separator 4 enter after steam separator 4 and external vapor mixing heat exchanger 5 heat exchanger 5 tube sides with the conversion gas converting heat of middle change stove 6 outlets, be preheated to 290～310 ℃ of left and right, in warp, power transformation stove 7 enters 6 one sections, middle change stove, generating conversion gas (CO:12～15%) in 6 one sections, middle change stove through reaction under catalyst (model: B117 and B112) katalysis regulates temperature and enters 6 two sections, middle change stove after to 280-320 ℃ through catalyst (model: B112) react under the katalysis through vapor superheater 8.Middle change stove 6 second-stage reactions generate the conversion gas (CO:8～10%) that obtains and lower the temperature through heat exchanger 5 heat exchange, enter one section thermosistor 9 temperature adjustment and enter low 10 1 sections, the stove of becoming after 280-300 ℃ in catalyst (model: react under katalysis B303Q), further be reduced at this CO; Low become 10 1 sections gases out of stove enter two sections thermosistors 11 again temperature adjustment enter 10 2 sections, low change stove after 280-300 ℃ in catalyst (model: carry out end reaction under katalysis B303Q); The low conversion gas temperature approximately 225 ℃ (CO:5～7%) that becomes stove 10 second-stage reactions generations enters water thermosistor 12 recovery waste heats again, reduction conversion gas temperature to 125 ℃ left and right, then enter hot-water tower 13 bottoms, hot water counter current contact under with top spray, recovered steam and sensible heat reduce below conversion gas temperature to 100 ℃; Out enter the further heat exchange of soft water preheater 14 and be cooled to 75 ℃ of left and right; Then enter water recirculator 15 and be cooled to below 45 ℃, send at last compression three to advance.
the water of hot-water tower 13 enters hot water pump 16, 100 ℃ of left and right of hot water pump 16 temperature out enter water thermosistor 12 and the low conversion gas converting heat that becomes stove 10 second-stage reactions generations, temperature out is the water of 115 ℃, this water enters two sections thermosistors 11 and carries out gas converting heat, out enter again one section thermosistor 9 and heat exchanger 5 exit gas heat exchange by the top after absorbing the part heat that hangs down the conversion gas that becomes stove 10 one section outlets, temperature reaches 140 ℃ of left and right, last hot water enter saturator 3 top sprays and under, with the semi-water gas counter current contact, hot water is got back to hot-water tower 13 through water seal 17 and is recycled.
Claims (2)
1. a carbon monoxide for synthesizing ammonia transform method, is characterized in that, comprises the steps:
1) enter coke filter after semi-water gas cools to 60～70 ℃ and separate greasy dirt;
2) described semi-water gas is being brought up to temperature 110～125 ℃ with water vapor in saturator;
3) described semi-water gas be preheating to 290～310 ℃ after described water vapor mixes;
4) gas mixture after preheating in one section, middle change stove under the catalyst katalysis reaction obtain to contain the conversion gas of 12～15% carbon monoxide;
5) after the described conversion gas regulation temperature to 280 that contains 12～15% carbon monoxide～320 ℃ in two sections, middle change stove under the catalyst katalysis reaction obtain to contain the conversion gas of 8～10% carbon monoxide;
6) the described conversion gas that contains 8～10% carbon monoxide enters the low conversion gas that the stove reaction obtains to contain 5～7% carbon monoxide that becomes;
Wherein, the preheating of the gas mixture of described semi-water gas and water vapor is to be undertaken by the mode of carrying out heat exchange with the conversion gas of middle change outlet of still in heat exchanger, entering low one section, the stove that becomes after the described conversion gas temperature that contains 8～10% carbon monoxide reaches 280～300 ℃ reacts under the catalyst katalysis, reacted gas reacts under the catalyst katalysis through entering low two sections, the stove that becomes after two sections thermosistor temperature adjustments again, sends into compression three after described low change stove conversion gas is out lowered the temperature through step and advances;
Wherein, described step cool-down method is:
A, conversion gas enter water thermosistor recovery waste heat;
The conversion gas of B, recovery waste heat enters hot-water tower bottom recovered steam and sensible heat;
C, the conversion gas that has reclaimed steam and sensible heat enter the hot water preheater and further lower the temperature;
D, advance from sending into compression three after hot water preheater conversion gas out enters water recirculator cooling.
2. carbon monoxide for synthesizing ammonia transform method according to claim 1, is characterized in that, the method for temperature control of described one section thermosistor, two sections thermosistors and water thermosistor is that the temperature adjustment step is take water as the temperature adjustment of heat exchange medium:
The water of A, hot-water tower enters water thermosistor and the low conversion gas converting heat that becomes the generation of stove second-stage reaction;
B, A step water out enter two sections thermosistors and absorb the low heat that becomes the conversion gas of stove one section outlet;
C, two sections thermosistors water out enter one section thermosistor and heat exchanger outlet gas converting heat;
D, one section thermosistor hot water out enter the saturator top spray and under, with the semi-water gas counter current contact;
E, saturator hot water is out got back to hot-water tower and is recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100636431A CN102530862B (en) | 2012-03-12 | 2012-03-12 | Carbon monoxide conversion method for ammonia synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100636431A CN102530862B (en) | 2012-03-12 | 2012-03-12 | Carbon monoxide conversion method for ammonia synthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102530862A CN102530862A (en) | 2012-07-04 |
| CN102530862B true CN102530862B (en) | 2013-11-06 |
Family
ID=46339092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100636431A Expired - Fee Related CN102530862B (en) | 2012-03-12 | 2012-03-12 | Carbon monoxide conversion method for ammonia synthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102530862B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241712B (en) * | 2013-04-09 | 2016-03-16 | 内蒙古乌拉山化肥有限责任公司 | A kind of semi-water gas treatment process |
| CN104609367A (en) * | 2014-11-27 | 2015-05-13 | 陶维君 | Technology of utilizing reaction temperature to replace part of heat exchange area of heat exchanger |
| CN104925754A (en) * | 2015-05-20 | 2015-09-23 | 广西科技大学 | Composite catalytic active agent |
| CN108264020B (en) * | 2018-02-06 | 2019-02-22 | 柳州豪祥特科技有限公司 | A kind of water-gas hydrogen producer |
| CN110655092A (en) * | 2019-09-20 | 2020-01-07 | 安徽泉盛化工有限公司 | Method for improving capacity of synthetic ammonia conversion section |
| CN115784150A (en) * | 2022-11-01 | 2023-03-14 | 山东明泉新材料科技有限公司 | Furnace temperature control method of adiabatic shift converter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1121050B (en) * | 1979-10-11 | 1986-03-26 | Giuseppe Giammarco | PROCEDURE FOR IMPROVING THE PERFORMANCE OF THE CARBON OXIDE CONVERSION SYSTEM AND ITS THERMAL CONNECTION WITH CO2 AND H2S ELIMINATION SYSTEMS PROVIDED WITH LOW HEAT CONSUMPTION REGENERATION METHODS |
| CN1019568B (en) * | 1990-06-28 | 1992-12-23 | 湖北省化肥协会 | Carbon monoxide low temp. transition process |
| US5464606A (en) * | 1994-05-27 | 1995-11-07 | Ballard Power Systems Inc. | Two-stage water gas shift conversion method |
| CN1064928C (en) * | 1997-11-19 | 2001-04-25 | 中国石化齐鲁石油化工公司 | Transformation process without saturation tower |
| DE102007015245A1 (en) * | 2007-03-29 | 2008-10-02 | Linde Ag | Process and apparatus for producing synthesis gas |
| CN101434879B (en) * | 2008-12-15 | 2012-09-19 | 四川天一科技股份有限公司 | Method for preparing methyl alcohol synthesis gas and compressed natural gas from coke oven gas and coal |
-
2012
- 2012-03-12 CN CN2012100636431A patent/CN102530862B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102530862A (en) | 2012-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102530862B (en) | Carbon monoxide conversion method for ammonia synthesis | |
| JP5796672B2 (en) | How to operate a blast furnace or steelworks | |
| CN101717073B (en) | Method for preparing synthesis gas from coke oven gas | |
| CN101050390B (en) | CO conversion technique matched to coal gasification | |
| CN102585951B (en) | Process for co-production of liquefied synthesis gas, pure hydrogen and methanol from coke-oven gas | |
| CN104774663B (en) | One-step method coal synthetic natural gas and its system | |
| CN203096014U (en) | Device for producing natural gas from factory waste gas | |
| CN104445060B (en) | Comprehensive utilization method for high-temperature energy | |
| CN103303863A (en) | Method for producing ammonia synthesis gas from coke-oven gas | |
| CN102229827A (en) | Method for producing synthetic natural gas | |
| CN101492398B (en) | Urea production process of high-efficiency condensation, low-mounting height CO2 air stripping method and high-voltage lamp type full condensation reactor | |
| CN102010284B (en) | Method for producing substitute natural gas by coal based syngas through methanation | |
| CN101985574B (en) | A kind of processing method utilizing synthetic gas to prepare Sweet natural gas | |
| CN106699508A (en) | Process for high-efficiency and environment-friendly synthesis of methanol by coke oven gas | |
| CN105542889A (en) | Quenching type methanation process with heat removing internally | |
| CN101659879B (en) | Chemical-electric poly-generation method and equipment | |
| CN105905869A (en) | Coal-to-hydrogen CO conversion poly-generation method and device | |
| CN102952597A (en) | Circulation-free process of synthesizing natural gas | |
| CN102337162B (en) | Low-water-steam-ratio saturated hot water tower CO transformation process | |
| CN110436413B (en) | Biogas and solar complementary two-stage synthesis gas preparation system and method | |
| CN215364900U (en) | Process system for chemical ring hydrogen production | |
| CN204569865U (en) | Single stage method coal synthetic natural gas system | |
| CN213231512U (en) | Natural gas hydrogen production medium temperature shift system | |
| CN212533048U (en) | Equipment for blast furnace dehumidification and blast by using blast furnace slag flushing water | |
| CN107973270B (en) | Process for preparing ethylene glycol synthesis gas by coke oven gas carbon-supplementing conversion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20120704 Assignee: Zaoyang Chemical Industry Co.,Ltd. Assignor: Xishui County Furuide Chemical Co., Ltd. Contract record no.: 2015420000093 Denomination of invention: Carbon monoxide conversion method for ammonia synthesis Granted publication date: 20131106 License type: Exclusive License Record date: 20150604 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20180312 |