CN106187684B - The method that calcium carbide stove exhaust based on temperature control transformation prepares methanol and dimethyl ether - Google Patents
The method that calcium carbide stove exhaust based on temperature control transformation prepares methanol and dimethyl ether Download PDFInfo
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- CN106187684B CN106187684B CN201610516858.2A CN201610516858A CN106187684B CN 106187684 B CN106187684 B CN 106187684B CN 201610516858 A CN201610516858 A CN 201610516858A CN 106187684 B CN106187684 B CN 106187684B
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- calcium carbide
- stove exhaust
- carbide stove
- furnace
- dimethyl ether
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/15—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively
- C07C29/151—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases
- C07C29/152—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases characterised by the reactor used
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/09—Preparation of ethers by dehydration of compounds containing hydroxy groups
Abstract
The invention discloses the method and apparatus for preparing methanol and dimethyl ether based on the calcium carbide stove exhaust that temperature control converts, it is reacted during temperature control conversion reaction with vapor using calcium carbide stove exhaust more than needed, form hydrogen partial, methanol is mixed with the hydrogen after external purification again, avoid the drawbacks of tradition after calcium carbide stove exhaust purification more than needed by discharging, be conducive to improve methanol output, avoid the discharge of GHG carbon dioxide, increase economic efficiency.
Description
Technical field
The present invention relates to dimethyl ether preparation field, the calcium carbide stove exhaust for being based particularly on temperature control transformation prepares methanol and diformazan
Ether method and device.
Background technique
Theoretically, the manufacturing of dimethyl ether is by CO and H2Two step method to be reacted to complete, the first first step generates methanol, the
Two steps regenerate dimethyl ether, but in actual production manufacturing process, CO and H2Proportion problem but can become restrict production efficiency
Major issue.For example Ming River snow company shares the production line of 12 sodium chlorate, every production of sodium chlorate line can at most be supplied
600-800NM3/ when 98-99% hydrogen, the production line of 12 sodium chlorate can at most supply 7200-9600NM3/ when
The hydrogen of 98-99%.Carry out requirement by the amount of 80,000 tons of methanol productions of design, the sodium chlorate tail gas of 98.9% hydrogen need to be contained
663Kmol/h, that is, 14851NM3/ h, still poor about hydrogen 5400-7800NM3/ h. is however, calcium carbide stove exhaust in actual production process
Amount is bigger, and every furnace maximum can supply 3000NM to the furnace of calcium carbide of 50,000 tons of calcium carbides per hour3The calcium carbide tail gas of/h, four calcium carbides
Maximum can supply 12000NM to furnace per hour3The calcium carbide tail gas of/h needs 10000NM by design3The calcium carbide tail gas of/h is opposite with hydrogen
For, the supply of hydrogen is small, calcium carbide stove exhaust it is in large supply, be that the more carbon of hydrogen are few for methanol, annual exhaustless number
The calcium carbide stove exhaust of ten million side discharges in vain, causes significant wastage.
Summary of the invention
Based on this, in view of the above-mentioned problems, it is necessary to propose that the calcium carbide stove exhaust converted based on temperature control prepares methanol and diformazan
Ether method and device, the application make full use of latest domestic temperature control converter technique, and calcium carbide tail gas is reacted with vapor and generates hydrogen
Gas, so that voluminous methanol, increases economic efficiency.
The purpose of the present invention is achieved through the following technical solutions: the calcium carbide stove exhaust based on temperature control transformation prepares first
The method of pure and mild dimethyl ether comprising following steps:
Preliminary purification: calcium carbide stove exhaust is handled by the first purification furnace oil removing and chalk dust removing, then passes through the second purification furnace
Defluorinate and dephosphorization treatment；
Temperature control transformation: the calcium carbide stove exhaust after preliminary purification is sent between converting main hot traffic control, is heated by high temperature shift gas
To 180 DEG C -280 DEG C, CS is inwardly supplemented2Afterwards, quantitative water vapour is remixed to be sequentially sent to electric heater and the deoxygenation of deoxygenation furnace and remove
Arsenic, then to calcium carbide stove exhaust spray cooling to after 220 DEG C -230 DEG C, into primary transform furnace, by carbon monodixe conversion at hydrogen,
Carbon dioxide gas is generated simultaneously；
Heat exchange cooling: the calcium carbide stove exhaust come out by primary transform furnace successively enters to be equipped with by deoxygenation furnace lower end again urges on a small quantity
Second variation furnace of agent, further decreases carbon monoxide and conversion organic sulfur, enters back into the main hot traffic control of transformation and furnace of calcium carbide
Tail gas carries out heat exchange cooling, so that the conversion gas temperature of this step is lower than 180 DEG C after heat exchange, then is sequentially sent to demineralized-water preheater
Enter thick desulfurized step after recycling heat, cooled type separator；
Thick desulfurization: the H in gas will be converted by dry desulfurization tank2S content is by 120mg/NM3It takes off to≤10mg/NM3, then
It is sent into deep purifying step；
Deep purifying:, will after the gas after thick desulfurization is sent into TSA device, PSA device and fine de-sulfur tank purified treatment
The content of sulphur and impurity takes off to≤0.1PPM, and is sent into virgin gas surge tank and hydrogen mixing；
The mixing of two kinds of gas: purified hydrogen is sent into virgin gas surge tank after hydrogen compresses, with purification
The calcium carbide stove exhaust mixing of essence purification again, forms gaseous mixture after transformation；
It prepares methanol: gaseous mixture is successively synthesized into first after defluorinate takes off carbonyl iron processing unit and joint compression set
Alcohol；
It prepares dimethyl ether: dimethyl ether being made by the dehydration of dimethyl ether process and rectifying by the crude carbinol synthesized.
Preferably, temperature≤40 DEG C of the calcium carbide stove exhaust in preliminary purification step, pressure limit 1.3- are set in
1.5MpaG。
Preferably, it is set in temperature control shift step, the CO content in the calcium carbide stove exhaust at deoxygenation outlet of still is minimum
19.4%.
Preferably, it sets after the cold desalted water recycling heat in demineralized-water preheater is heated and send to oxygen-eliminating device.
Preferably, the conductivity of the cold desalted water in demineralized-water preheater is set as≤1us/cm.
Including the first purification furnace, the second purification furnace, the main hot traffic control of transformation, electric heater, deoxygenation furnace, primary transform furnace, desalination
Water preheater, cooled type separator, thick digester, TSA device, PSA device, fine de-sulfur tank, virgin gas surge tank, dechlorination decarbonylation base
Iron processing unit and joint compression set；The outlet of first purification furnace is connected with the entrance of the second purification furnace, the second purification furnace
Outlet is connected with main hot traffic control is converted, and converts main hot traffic control and is successively connected with electric heater, deoxygenation furnace and primary transform furnace, primary transform
Furnace, deoxygenation furnace, electric heater and the main hot traffic control of transformation are also sequentially connected to form temperature control transformation loop, convert the outlet of main hot traffic control
It is slow also to pass sequentially through demineralized-water preheater, cooled type separator, thick digester, TSA device, PSA device, fine de-sulfur tank, virgin gas
Rush tank, defluorinate deferrization processing unit is connected with joint compression set, last and methanol-fueled CLC, DME synthesis and rectifier unit
It is connected, hydrogen inlet is additionally provided on the virgin gas surge tank, steam entry, the primary transform furnace are additionally provided on electric heater
It is interior to be provided with water equipped with catalyst bed and several heat exchanger tubes, heat exchanger tube.
Preferably, it is equipped with degreaser bed in the first purification furnace, is equipped with defluorinating agent bed and Dephosphorising agent in the second purification furnace
Bed.
Preferably, oxygen scavenger and arsenic removing agent are equipped in deoxygenation furnace.
Preferably, it is equipped with active carbon in thick digester and fine de-sulfur tank, the active carbon being equipped in fine de-sulfur tank is can be with
Convert COS and CS2Absorption-type special typed active carbon.
The beneficial effects of the present invention are:
(1) converted using temperature control, have and use wide temperature region, be not easy overtemperature, light-off temperature is low, reaction when there is no side reaction etc.
Feature；
(2) very low amount vapor is needed, the required big portion of steam can be self-produced, has saved vapor fueled, has saved boiler oil
That is calcium carbide stove exhaust, for improving methanol output；
(3) it is suitable for the wide variation of load, the design can not only use the height of automatic steam control interconversion rate, it is also possible to be
By-pass of uniting adjusts carbon monoxide and hydrogen, to meet the needs of methanol-fueled CLC virgin gas H/c ratio；
(4) it avoids the process of conventionally manufactured methanol and dimethyl ether excessive to the demand of hydrogen, avoids calcium carbide stove exhaust mistake
It is more and hydrogen is very few, limit the performance of production capacity；
(5) discharge for reducing conventional methanol and dimethyl ether production process percent of greenhouse gases carbon dioxide, is conducive to environment
Protection.
Detailed description of the invention
Fig. 1 is that the present invention prepares methanol and dimethyl ether obtains flow chart.
Specific embodiment
The embodiment of the present invention is described in detail with reference to the accompanying drawing.
Embodiment 1:
As shown in Figure 1, the method that the calcium carbide stove exhaust based on temperature control transformation prepares methanol and dimethyl ether comprising following step
It is rapid:
S1, preliminary purification: calcium carbide stove exhaust is handled by the first purification furnace oil removing and chalk dust removing, then passes through the second purification
Furnace defluorinate and dephosphorization treatment；
S2, temperature control transformation: the calcium carbide stove exhaust after preliminary purification is sent between converting main hot traffic control, is added by high temperature shift gas
Heat inwardly supplements CS to 180 DEG C2Afterwards, it remixes quantitative water vapour and is sequentially sent to electric heater and deoxygenation furnace, then to furnace of calcium carbide tail
After gas blowout water is cooled to 220 DEG C, into primary transform furnace；
S3, heat exchange cooling: the calcium carbide stove exhaust come out by primary transform furnace successively enters transformation master by deoxygenation furnace lower end again
It in hot traffic control, exchanges heat converting in main hot traffic control with the calcium carbide stove exhaust in temperature control shift step, so that this step after heat exchange
Rapid conversion gas temperature is lower than 180 DEG C, then enters thick desulfurization after being sequentially sent to demineralized-water preheater recycling heat, cooled type separator
Step；
S4, thick desulfurization: the H in gas will be converted by dry desulfurization tank2S content takes off to≤10mg/NM3, it is re-fed into depth
Purifying step；
S5, deep purifying: the gas after thick desulfurization is sent into TSA device, PSA device and fine de-sulfur tank purified treatment
Afterwards, total sulfur and all impurity contents are taken off to≤0.1PPM (arsenic requirement≤0.005PPM), and is sent into the neutralization of virgin gas surge tank
Hydrogen mixing；
The mixing of S6, two kinds of gas: purified hydrogen is sent into virgin gas surge tank after hydrogen compresses, and net
Change transformed calcium carbide stove exhaust mixing, forms gaseous mixture；
S7, it prepares methanol: gaseous mixture is successively synthesized after defluorinate takes off carbonyl iron processing unit and joint compression set
Methanol；
S8, it prepares dimethyl ether: dimethyl ether being made by the dehydration of dimethyl ether process and rectifying by the crude carbinol synthesized.
Embodiment 2:
The method that calcium carbide stove exhaust based on temperature control transformation prepares methanol and dimethyl ether comprising following steps:
S1, preliminary purification: calcium carbide stove exhaust is handled by the first purification furnace oil removing and chalk dust removing, then passes through the second purification
Furnace defluorinate and dephosphorization treatment；
S2, temperature control transformation: the calcium carbide stove exhaust after preliminary purification is sent between converting main hot traffic control, is added by high temperature shift gas
Heat inwardly supplements CS to 280 DEG C2Afterwards, it remixes quantitative water vapour and is sequentially sent to electric heater and deoxygenation furnace, then to furnace of calcium carbide tail
After gas blowout water is cooled to 230 DEG C, into primary transform furnace；
S3, heat exchange cooling: the calcium carbide stove exhaust come out by primary transform furnace successively enters transformation master by deoxygenation furnace lower end again
It in hot traffic control, exchanges heat converting in main hot traffic control with the calcium carbide stove exhaust in temperature control shift step, so that this step after heat exchange
Rapid conversion gas temperature is lower than 180 DEG C, then enters thick take off after being sequentially sent to demineralized-water preheater recycling heat, cooled type separator
Sulphur step；
S4, thick desulfurization: the H in gas will be converted by dry desulfurization tank2S content takes off to≤10mg/NM3, it is re-fed into depth
Purifying step；
S5, deep purifying: the gas after thick desulfurization is sent into TSA device, PSA device and fine de-sulfur tank purified treatment
Afterwards, total sulfur and all impurity contents are taken off to≤0.1PPM (arsenic requirement≤0.005PPM), and it is sent into the neutralization of virgin gas surge tank
Hydrogen mixing；
The mixing of S6, two kinds of gas: purified hydrogen is sent into virgin gas surge tank after hydrogen compresses, and net
Change transformed calcium carbide stove exhaust mixing, forms gaseous mixture；
S7, it prepares methanol: gaseous mixture is successively synthesized after defluorinate takes off carbonyl iron processing unit and joint compression set
Methanol；
S8, it prepares dimethyl ether: dimethyl ether being made by the dehydration of dimethyl ether process and rectifying by the crude carbinol synthesized.
Embodiment 3:
The method that calcium carbide stove exhaust based on temperature control transformation prepares methanol and dimethyl ether comprising following steps:
S1, preliminary purification: calcium carbide stove exhaust is handled by the first purification furnace oil removing and chalk dust removing, then passes through the second purification
Furnace defluorinate and dephosphorization treatment；
S2, temperature control transformation: the calcium carbide stove exhaust after preliminary purification is sent between converting main hot traffic control, is added by high temperature shift gas
Heat inwardly supplements CS to 220 DEG C2Afterwards, it remixes quantitative water vapour and is sequentially sent to electric heater and deoxygenation furnace, then to furnace of calcium carbide tail
After gas blowout water is cooled to 225 DEG C, into primary transform furnace；
S3, heat exchange cooling: the calcium carbide stove exhaust come out by primary transform furnace successively enters transformation master by deoxygenation furnace lower end again
It in hot traffic control, exchanges heat converting in main hot traffic control with the calcium carbide stove exhaust in temperature control shift step, so that this step after heat exchange
Rapid conversion gas temperature is lower than 180 DEG C, then enters thick desulfurization after being sequentially sent to demineralized-water preheater recycling heat, cooled type separator
Step；
S4, thick desulfurization: the H in gas will be converted by dry desulfurization tank2S content takes off to≤10mg/NM3, it is re-fed into depth
Purifying step；
S5, deep purifying: the gas after thick desulfurization is sent into TSA device, PSA device and fine de-sulfur tank purified treatment
Afterwards, total sulfur and all impurity contents are taken off to≤0.1PPM (arsenic requirement≤0.005PPM), and it is sent into the neutralization of virgin gas surge tank
Hydrogen mixing；
The mixing of S6, two kinds of gas: purified hydrogen is sent into virgin gas surge tank after hydrogen compresses, and net
Change transformed calcium carbide stove exhaust mixing, forms gaseous mixture；
S7, it prepares methanol: gaseous mixture is successively synthesized after defluorinate takes off carbonyl iron processing unit and joint compression set
Methanol；
S8, it prepares dimethyl ether: dimethyl ether being made by the dehydration of dimethyl ether process and rectifying by the crude carbinol synthesized.
In several of the above embodiments where, the present invention considers the thick desulfurization of conversion gas, for the anti-sulphur for preventing cobaltmolybdate catalyst
Change, in variation stokehold added with CS2, CS2By the cobaltmolybdate catalyst conversion in primary transform furnace, major part is converted to hydrogen sulfide, sulphur
Change hydrogen and abjection is adsorbed by the big portion of each two normal activated carbons for filling 35 sides, a small amount of hydrogen sulfide and carbon disulfide pass through subsequent
TSA device and the abjection of PSA device, most deviate from micro H through fine de-sulfur tank afterwards2S and CS2And COS etc., make its total sulfur Da Dao≤
0.1PPM.It mixes, finally send to methanol-fueled CLC process synthesizing methanol with hydrogen before being sent again to methanol-fueled CLC process.
In addition, the desalination water quality for humidification is very crucial, because amount of water sprayed is larger, even if containing on a small quantity in desalted water
Salt, accumulating over a long period will also result in a large amount of salt and is adsorbed on catalyst bed, increase catalyst bed layer resistance, under activity
Drop.It is required that desalination water electric conductivity≤1 μ S/cm.
With amount of humidification adjust charging temperature when, for avoid humidification band water, not preferably less than 200 DEG C of inlet temperature.
Calcium carbide stove exhaust based on temperature control transformation prepares the device of methanol and dimethyl ether, including the first purification furnace, second are only
Change furnace, the main hot traffic control of transformation, electric heater, deoxygenation furnace, primary transform furnace, demineralized-water preheater, cooled type separator, thick digester,
TSA device, PSA device, fine de-sulfur tank, virgin gas surge tank, defluorinate take off carbonyl iron processing unit and joint compression set；First
The outlet of purification furnace is connected with the entrance of the second purification furnace, and the outlet of the second purification furnace is connected with main hot traffic control is converted, transformation master
The temperature control conversion line of hot traffic control is to convert main hot traffic control, electric heater, deoxygenation furnace and primary transform furnace to be sequentially connected, and converts main heat
The route of the temperature control inverse transformation of traffic control is that main change furnace, deoxygenation furnace, electric heater and the main hot traffic control of transformation are sequentially connected, transformation master
The outlet of hot traffic control passes sequentially through demineralized-water preheater, cooled type separator, thick digester, TSA device, PSA device, fine de-sulfur
Tank, virgin gas surge tank, defluorinate deferrization processing unit are connected with joint compression set, last and methanol-fueled CLC, DME synthesis
It is connected with rectifier unit.It is additionally provided with hydrogen inlet on the virgin gas surge tank, is additionally provided with steam entry on electric heater.
In general, calcium carbide stove exhaust is different from the unstripped gas that other gas making modes generate, and CO content therein is special
Height accounts for about 70%-80%, higher than the CO content in the conversion gas of water-gas and natural gas.So high CO content is to transformation work
The selection of skill is a challenge.
The catalyst applied to temperature control transformation has three classes at present, is Fe-Cr system hts catalyst, the wide temperature of Co-Mo system respectively
Sulfur-resistant transformation catalyst and Cu-Zu system low change catalyzer, since Fe-Cr system hts catalyst activity warm area is 300 DEG C -500
DEG C, it is applied to calcium carbide stove exhaust and converts, needs very high liquid to steam ratio just and can guarantee reaction temperature in active warm area, therefore,
A large amount of steam and the energy are not only wasted, but also a large amount of condensed water is being needed to be handled.Cu-Zn system low change catalyzer then because
To use warm area too narrow (200-250 degree), it is applied to the extra high calcium carbide stove exhaust of CO content and is easy overtemperature inactivation.Co-Mo system
Wide temperature sulfur-resistant transformation catalyst does not have side reaction when having using wide temperature region, light-off temperature low (200 degree), low water-gas ratio, reaction
The features such as, it is most suitably adapted for the transformation catalyst of calcium carbide stove exhaust, but need to be added the H of certain content2S。
Since the CO content of calcium carbide stove exhaust transformation entrance reaches 74%, according to the requirement of present apparatus CO interconversion rate, use
Traditional insulation shift-converter, not only long flow path, equipment investment is big, and since CO content is high, the reaction of change furnace is violent,
The easy overtemperature of bed temperature, shows according to practical operating experiences: under the atmosphere and excessively high reaction temperature of high CO, it will occurs bright
Aobvious methanation side reaction, and the higher side reaction of temperature is fiercer, easily generates " temperature runaway " (insulation temperature of methanation side reaction
Rise, be ten times of normal conversion reaction or more), catalyst inactivation is caused, such as controls bad, will also directly threaten safe life
It produces.Therefore we use primary transform furnace for the wide warm sulfur resistant conversion process of the Co-Mo system of temperature control.
Primary transform furnace is substantially that heat exchanger is built in reactor, and the built-in water of heat exchanger tube is distributed in catalyst bed
(pipe exterior catalyst), the catalyst reaction heat outside pipe are heated to the boiler water of the other side (in pipe), form water and saturated water steams
Steam circulation system.Since the water in heat exchanger tube absorbs the heat of conversion reaction, while the water vapour generated in time, and pass through control
Steam pressure controls the temperature of catalyst bed.The circulation of vapor and water in heat exchanger tube ensure that the perseverance of reaction temperature
Fixed, for catalyst bed close to isothermal operation, bed temperature is easily controllable.Catalyst bed operation temperature is lower and variable gradient
It is small, the problem of there is no catalyst overtemperatures, it ensure that catalyst uses under mild conditions, extend the use of catalyst
Service life.Since reaction temperature is low, the equilibrium constant is big, thus the reactor is under identical water-gas ratio, CO interconversion rate considerably beyond
Traditional insulation shift-converter, thus shorten process.
A specific embodiment of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as, it is noted that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (5)
1. the method that the calcium carbide stove exhaust based on temperature control transformation prepares methanol and dimethyl ether, which comprises the following steps:
Preliminary purification: calcium carbide stove exhaust is handled by the first purification furnace oil removing and chalk dust removing, then passes through the second purification furnace defluorinate
And dephosphorization treatment；
Temperature control transformation: the calcium carbide stove exhaust after preliminary purification is sent between converting main hot traffic control, is heated to by high temperature shift gas
It 180 DEG C -280 DEG C, after inwardly supplementing CS2, remixes quantitative water vapour and is sequentially sent to electric heater and the deoxygenation of deoxygenation furnace and arsenic removal,
Again to calcium carbide stove exhaust spray cooling to after 220 DEG C -230 DEG C, into primary transform furnace, by carbon monodixe conversion at hydrogen, simultaneously
Generate carbon dioxide gas；
Heat exchange cooling: the calcium carbide stove exhaust come out by primary transform furnace successively enters by deoxygenation furnace lower end equipped with a small amount of catalyst again
The second variation furnace, further decrease carbon monoxide and conversion organic sulfur, enter back into the main hot traffic control of transformation and calcium carbide stove exhaust
Heat exchange cooling is carried out, so that the conversion gas temperature of this step is lower than 180 DEG C after heat exchange, then is sequentially sent to demineralized-water preheater recycling
Enter thick desulfurized step after heat, cooled type separator；
Thick desulfurization: the H in gas will be converted by dry desulfurization tank2S content is by 120mg/NM3It takes off to≤10mg/NM3, it is re-fed into
Deep purifying step；
Deep purifying: after the gas after thick desulfurization is sent into TSA device, PSA device and fine de-sulfur tank purified treatment, by sulphur and
The content of impurity takes off to≤0.1PPM, and is sent into virgin gas surge tank and hydrogen mixing；
The mixing of two kinds of gas: purified hydrogen is sent into virgin gas surge tank after hydrogen compresses, and is converted with purification
The calcium carbide stove exhaust mixing of essence purification again afterwards, forms gaseous mixture；
It prepares methanol: gaseous mixture is successively taken off into carbonyl iron processing unit and synthesizing methanol after joint compression set by defluorinate；
It prepares dimethyl ether: dimethyl ether being made by the dehydration of dimethyl ether process and smart pomegranate by the crude carbinol synthesized.
2. the method that the calcium carbide stove exhaust according to claim 1 based on temperature control transformation prepares methanol and dimethyl ether, feature
It is, is set in temperature≤40 DEG C of the calcium carbide stove exhaust in preliminary purification step, pressure limit 1.3-1.5MpaG.
3. the method that the calcium carbide stove exhaust according to claim 1 based on temperature control transformation prepares methanol and dimethyl ether, feature
It is, is set in temperature control shift step, the CO content minimum 19.4% in the calcium carbide stove exhaust at deoxygenation outlet of still.
4. the method that the calcium carbide stove exhaust according to claim 1 based on temperature control transformation prepares methanol and dimethyl ether, feature
It is, the cold desalted water progress heat exchange recycling heat set in demineralized-water preheater is sent to oxygen-eliminating device.
5. the method that the calcium carbide stove exhaust according to claim 1 based on temperature control transformation prepares methanol and dimethyl ether, feature
It is, sets the conductivity of the cold desalted water in demineralized-water preheater as≤1us/cm.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5218003A (en) * | 1988-01-14 | 1993-06-08 | Air Products And Chemicals, Inc. | Liquid phase process for dimethyl ether synthesis |
| CN101856589A (en) * | 2009-04-07 | 2010-10-13 | 毕亚凡 | Purification method of industrial tail gas rich in carbon monoxide |
| CN103204470A (en) * | 2013-03-21 | 2013-07-17 | 新疆天业（集团）有限公司 | Gas transformation deep purifying technique for separating and purifying CO and H2 of calcium carbide furnace |
| CN103204469A (en) * | 2013-03-21 | 2013-07-17 | 新疆天业（集团）有限公司 | Full-low-transformation technique for tail gas of calcium carbide furnaces |
-
2016
- 2016-07-01 CN CN201610516858.2A patent/CN106187684B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5218003A (en) * | 1988-01-14 | 1993-06-08 | Air Products And Chemicals, Inc. | Liquid phase process for dimethyl ether synthesis |
| CN101856589A (en) * | 2009-04-07 | 2010-10-13 | 毕亚凡 | Purification method of industrial tail gas rich in carbon monoxide |
| CN103204470A (en) * | 2013-03-21 | 2013-07-17 | 新疆天业（集团）有限公司 | Gas transformation deep purifying technique for separating and purifying CO and H2 of calcium carbide furnace |
| CN103204469A (en) * | 2013-03-21 | 2013-07-17 | 新疆天业（集团）有限公司 | Full-low-transformation technique for tail gas of calcium carbide furnaces |
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