CN109279575A - Methanol low-temperature decomposing device - Google Patents
Methanol low-temperature decomposing device Download PDFInfo
- Publication number
- CN109279575A CN109279575A CN201710602572.0A CN201710602572A CN109279575A CN 109279575 A CN109279575 A CN 109279575A CN 201710602572 A CN201710602572 A CN 201710602572A CN 109279575 A CN109279575 A CN 109279575A
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- Prior art keywords
- methanol
- temperature
- condenser
- cracking reactor
- cracking
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0266—Processes for making hydrogen or synthesis gas containing a decomposition step
- C01B2203/0272—Processes for making hydrogen or synthesis gas containing a decomposition step containing a non-catalytic decomposition step
-
- 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
Abstract
The present invention relates to a kind of metal heat treatmet protective gas preparation facilities; especially methanol low-temperature decomposing device; including cracking reactor and condenser; the inlet of the cracking reactor is connect with nitrogen and methanol fluid reservoir respectively; the gas outlet of cracking reactor is connect with condenser, and the outlet of condenser is connect with outlet flowmeter；Heating device is housed on the cracking reactor.Heating device is electric heating tube, and electric heating tube is mounted on the top of cracking reactor, is also equipped with temperature sensor on cracking reactor.Feed liquor metering pump is housed between methanol fluid reservoir and inlet；Inlet air flow meter is housed between the nitrogen and inlet.Methanol low-temperature decomposing apparatus structure provided by the invention is simple, working service is convenient, temperature control is accurate, it is big using temperature span, can be carried out low temperature pyrolyzer, lysis efficiency are high, low energy consumption, cracking generates mixed-gas atmosphere uniformly, have a wide range of application, the carbon potential of cracking gas is up to 1.0%.
Description
Technical field
The present invention relates to a kind of metal heat treatmet protective gas preparation facilities, especially methanol low-temperature decomposing device.
Background technique
In the fields such as metal heat treatmet industry, new energy research and development, metallography laboratory, as modern industry adds heat treatment
The raising of work quality requirement, Equipment for Heating Processing generally use protective atmosphere to realize the low or non oxidizing of workpiece and less without decarburization.
Existing methanol class protective atmosphere preparation mainly uses high anneal crack equipment, which needs to crack under the high temperature conditions
Reaction prepares protective atmosphere, and equipment input cost is high, energy consumption is high, reaction temperature uniformity difference causes to crack insufficient or burning
Cracking, pipeline are easy to block because of carbon distribution, high failure rate；Separately there is a kind of low temperature pyrolyzer equipment to use oil-bath type structure, such knot
Structure is more complicated, and is limited using temperature by the boiling point of oil, and service efficiency is not high.
Summary of the invention
To solve the above problems, the present invention provides, a kind of structure is simple, temperature range is big, lysis efficiency is high, low energy consumption, no
The methanol low-temperature decomposing device of easy carbon distribution, the specific technical proposal is:
Methanol low-temperature decomposing device, including cracking reactor and condenser, the inlet of the cracking reactor respectively with
Nitrogen is connected with methanol fluid reservoir, and the gas outlet of cracking reactor is connect with condenser, the outlet of condenser and outlet flowmeter
Connection；Heating device is housed on the cracking reactor.
Preferably, the heating device is electric heating tube, and electric heating tube is mounted on the top of cracking reactor, cracking reaction
Temperature sensor is also equipped on device.
Preferably, feed liquor metering pump is housed between the methanol fluid reservoir and inlet；Between the nitrogen and inlet
Equipped with inlet air flow meter.
Preferably, counterbalance valve is housed between the feed liquor metering pump and inlet.
Preferably, the outlet flowmeter and inlet air flow meter are glass rotameter.
Preferably, safety relief valve is housed between the outlet of the condenser and outlet flowmeter.
Preferably, pressure gauge is housed between the outlet of the condenser and outlet flowmeter.
Preferably, condenser fan is housed on the condenser.
Preferably, the bottom of the condenser condenses the bottom of collecting chamber equipped with valve equipped with condensation collecting chamber.
Existing cracking reactor includes interconnected vaporizing chamber and cracking reaction room, and vaporizing chamber is equipped with inlet, splits
Reaction chamber is solved equipped with cracking catalyst, heating device and gas outlet.For existing heating device using oil heating, structure is more complicated,
And limited using temperature by the boiling point of oil, maximum temperature is 290 DEG C.Therefore oil heating is changed to electric heating, structure is simply, most
High heating temperature can be increased to 390 DEG C, while temperature control is accurate, easy to maintain, service efficiency improves, low energy consumption, is only about
The 20-25% of Pintsch process energy consumption.
Feed liquor metering pump, heating device, temperature sensor and condenser fan are connect with control system.Control system passes through
Feed liquor metering pump controls methanol liquid inlet volume；Control system controls the cracking of cracking reactor by temperature sensor and heating device
Temperature is able to maintain constant cracking temperature；It is air-cooled to condenser progress that control system controls fan.
Feed liquor metering pump improves methanol inlet hydraulic, and prevents nitrogen pressure is excessively high from leading to methanol eddy.
Condenser condenses the methanol steam for failing sufficiently to crack in temperature-rise period, avoids the high temperature of blocking Equipment for Heating Processing
Admission line.Condensed methanol enters condensation collecting chamber, is then refluxed for methanol fluid reservoir.
Safety relief valve guarantees that system is run under safe pressure, tries to avert accidents.
Counterbalance valve is able to maintain system demand pressure, enables the normal output flow of metering pump.
Glass rotameter facilitates adjusting flow.
It is passed through nitrogen and avoids the case where low-temperature range methanol does not crack, improve the efficiency of equipment cracking.Nitrogen is not only
Reactor is protected, while the subsequent air using in equipment can be discharged.
The methanol decomposition mixed gas that methanol low-temperature decomposing device generates has a wide range of application, and is suitable for middle and high, low all kinds of carbon
Steel, alloy Heat-Treatment of Steel protection, non-oxidizing bright.
Methanol decomposition gaseous mixture can be used as the enriched gas such as carrier gas collocation methane, acetone and use.
Structure is simple, and working service is convenient.
Operating temperature can be up to 390 degree.
Methanol is delivered to cracking reactor by feed liquor metering pump, and methanol is completed to split in the operating temperature of cracking reactor
Solution, cracking temperature is usually 260 DEG C -280 DEG C.Nitrogen, which is adjusted to enter by technique requirement after certain flow by inlet air flow meter, to be split
Solve reactor.Mixed gas after cracking is fully cooled in condenser, then by outlet flowmeter, and is sent by pipeline to respectively making
With equipment or storage device, outlet flowmeter adjusts gas output.
When work, heating device heats cracking reactor, then passes to high pure nitrogen, when heating setpoint temperature
When, stopping is filled with nitrogen, and feed liquor metering pump extracts methanol out from methanol fluid reservoir, and cracking reactor is flowed into after counterbalance valve
Vaporizing chamber vaporization, the methanol steam after vaporization enters cracking reaction room, and methanol steam passes through the catalyst in cracking temperature, first
Alcohol steam and catalyst come into full contact with and cracking reaction, and methanol is finally cracked into hydrogen and carbon monoxide, hydrogen and carbon monoxide group
At mixed gas condensed through condenser, condensation reduces water content, while recycling fails the methanol steam that sufficiently cracks, after condensation
Mixed gas exported by gas flowmeter to Equipment for Heating Processing.
Methanol low-temperature decomposing device carries out low temperature pyrolyzer by cracking reactor, and service efficiency improves, and energy consumption substantially reduces,
It is only about the 20-25% of Pintsch process energy consumption；The mixed gas that cracking generates has a wide range of application, and the carbon potential of cracking gas is up to
1.0%, it may be used as the carburizing atmosphere of surface treatment, can be used as the enriched gas such as carrier gas collocation nitrogen, methane, acetone and use, fit
For all kinds of carbon steels of middle height, alloy Heat-Treatment of Steel protection, non-oxidizing bright.
Compared with prior art the invention has the following advantages:
Methanol low-temperature decomposing apparatus structure provided by the invention is simple, working service is convenient, temperature control is accurate, uses temperature
Degree span is big, can be carried out low temperature pyrolyzer, lysis efficiency height, low energy consumption, cracks the mixed-gas atmosphere generated uniformly, application range
Extensively, the carbon potential of cracking gas is up to 1.0%.
Figure of description
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
Now in conjunction with attached drawing, the invention will be further described.
As shown in Figure 1, methanol low-temperature decomposing device, including cracking reactor 11 and condenser 21；Cracking reactor 11
Inlet 14 is connect with nitrogen and methanol fluid reservoir respectively, and feed liquor metering pump 12 is also equipped between methanol fluid reservoir and inlet 14
With counterbalance valve 13；Inlet air flow meter is housed between nitrogen and inlet 14；The gas outlet 15 of cracking reactor 11 and condenser 21
Connection is equipped with condenser fan on condenser 21, and the outlet of condenser 21 connect with outlet flowmeter 31, outlet flowmeter 31 with mix
The connection of clutch gas outlet；Safety relief valve 32 and pressure gauge 33 are also equipped between the outlet and outlet flowmeter 31 of condenser 21；
Heating device 16 is housed, heating device 16 is electric heating tube, and electric heating tube is mounted on cracking reaction on the cracking reactor 11
The top of device 11 is also equipped with temperature sensor on cracking reactor 11.
The bottom of condenser 21 is also equipped with condensation collecting chamber 22, and the bottom of condensation collecting chamber 22 is equipped with valve 23.
Outlet flowmeter 31 and inlet air flow meter are glass rotameter.
When work, heating device 16 heats cracking reactor 11, then passes to high pure nitrogen, when heating setpoint temperature
When spending, stopping is filled with nitrogen, and feed liquor metering pump 12 extracts methanol out from methanol fluid reservoir, and cracking is flowed into after counterbalance valve 13
The vaporizing chamber of reactor 11 vaporizes, and the methanol steam after vaporization enters cracking reaction room, and methanol steam, which passes through, is in cracking temperature
Catalyst, methanol steam and catalyst come into full contact with and cracking reaction, and methanol is finally cracked into hydrogen and carbon monoxide, hydrogen and one
The mixed gas of carbonoxide composition is condensed through condenser 21, and condensation reduces water content, while recycling fails the methanol sufficiently cracked
Steam, condensed mixed gas are exported by outlet flowmeter 31 to Equipment for Heating Processing.
Methanol low-temperature decomposing device is used for bearing steel wire rod isothermal spheroidizing bright annealing:
Annealing temperature is 830 DEG C, and heat treatment equipment is roller-hearth continuous annealing furnace, and protective atmosphere is n-formyl sarcolysine alcohol gas
Atmosphere, i.e. dissociated methanol gas and nitrogen.
Use state explanation: bearing steel carries out needing to carry out spherodized structure annealing before cold conditions drawing, reduces material fragility,
Improve toughness.Material is first replaced using nitrogen after beginning to warm up, and is started after fire box temperature rises to 750 DEG C into dissociated methanol gas.
Cracking gas enters burner hearth by the mixer gas outlet of methanol low-temperature decomposing device at this time and nitrogen forms n-formyl sarcolysine alcohol hybrid protection gas.
The small part oxygen brought into furnace by wire rod burns with cracking gas generate H2O and CO2 under the high temperature conditions, with protection gas
Constantly enter, oxidizing gas, which is gradually replaced, comes out of the stove outside.Non-oxidation protection is carried out in the overall process of bearing steel annealing.After annealing
Product non-oxidizing bright decarburization.
Methanol low-temperature decomposing device is protected for bearing ring continuous quenching:
Hardening heat is 860 DEG C；Heat treatment equipment is net belt type continuous hardening furnace；Protective atmosphere is dissociated methanol gas
Atmosphere.
Use state explanation: the heat treatment of bearing parts requires atmosphere protection, generally uses reducing atmosphere.Do not having
The problems such as in the case that oxidizing atmosphere ratio is high in atmosphere or atmosphere, product will appear skin decarburization, oxidation, deformation.Such as
The excessive use enriched gas of fruit, then can make product surface and furnace wall carbon distribution occur, and keep product surface hardness uneven.
After empty furnace heating, temperature opens methanol low-temperature decomposing device after reaching 750 DEG C, and starts to prepare mixed gas.
The gas production of adjusting methanol low-temperature decomposing device is required according to the technique of product.Mixed gas enters in furnace and forms fire in fire door
Curtain.The state of an anaerobic has been in furnace at this time, bearing ring part can be put into and be heat-treated.Bearing ring is brought into furnace
Moisture and oxygen can be burned in fire door and be replaced come out of the stove rapidly.Portioned product is required not due to phosphorus content and technique
Together, the enriched gas such as propane, methane can also be suitably added to increase atmosphere carbon potential.Methanol low-temperature decomposing device system is used after measured
The product of standby methanol decomposition gaseous mixture quenching, surface hardness is qualified, and case carbon is uniform, and surface-brightening.
Claims (9)
1. methanol low-temperature decomposing device, which is characterized in that including cracking reactor (11) and condenser (21), the cracking reaction
The inlet (14) of device (11) is connect with nitrogen and methanol fluid reservoir respectively, the gas outlet (15) of cracking reactor (11) and condensation
Device (21) connection, the outlet of condenser (21) is connect with outlet flowmeter (31)；Equipped with heating on the cracking reactor (11)
Device (16).
2. methanol low-temperature decomposing device according to claim 1, which is characterized in that the heating device (16) is electric heating
Pipe, electric heating tube are mounted on the top of cracking reactor (11), and cracking reactor is also equipped with temperature sensor on (11).
3. methanol low-temperature decomposing device according to claim 1, which is characterized in that the methanol fluid reservoir and inlet
(14) feed liquor metering pump (12) are housed between；Inlet air flow meter is housed between the nitrogen and inlet (14).
4. methanol low-temperature decomposing device according to claim 3, which is characterized in that the feed liquor metering pump (12) and feed liquor
Counterbalance valve (13) are housed between mouth (14).
5. methanol low-temperature decomposing device according to claim 1 or 3, which is characterized in that the outlet flowmeter (31) and
Inlet air flow meter is glass rotameter.
6. methanol low-temperature decomposing device according to claim 1, which is characterized in that the outlet of the condenser (21) with go out
Safety relief valve (32) are housed between air-flow meter (31).
7. methanol low-temperature decomposing device according to claim 1, which is characterized in that the outlet of the condenser (21) with go out
Pressure gauge (33) are housed between air-flow meter (31).
8. methanol low-temperature decomposing device according to claim 1, which is characterized in that equipped with condensation on the condenser (21)
Fan.
9. methanol low-temperature decomposing device according to claim 1, which is characterized in that the bottom of the condenser (21) is equipped with
It condenses collecting chamber (22), the bottom of condensation collecting chamber (22) is equipped with valve (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710602572.0A CN109279575A (en) | 2017-07-21 | 2017-07-21 | Methanol low-temperature decomposing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710602572.0A CN109279575A (en) | 2017-07-21 | 2017-07-21 | Methanol low-temperature decomposing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109279575A true CN109279575A (en) | 2019-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710602572.0A Pending CN109279575A (en) | 2017-07-21 | 2017-07-21 | Methanol low-temperature decomposing device |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342460A (en) * | 2019-05-29 | 2019-10-18 | 安徽青木子德慧能源发展有限公司 | A kind of reactor assembly based on formic acid cracking hydrogen with anti-overfoaming function |
| CN110342461A (en) * | 2019-05-29 | 2019-10-18 | 安徽青木子德慧能源发展有限公司 | A kind of reactor assembly and its starting method based on formic acid cracking hydrogen |
| CN112657431A (en) * | 2020-12-01 | 2021-04-16 | 安徽成泰医药科技有限公司 | Evacuating device for hydrogen production by methanol cracking |
| CN112748208A (en) * | 2020-12-29 | 2021-05-04 | 华中科技大学 | Online detection device for methanol cracking |
| CN114516667A (en) * | 2020-11-20 | 2022-05-20 | 中国石油天然气集团有限公司 | Reaction device for fixed bed cracking of oily wastewater for laboratory |
-
2017
- 2017-07-21 CN CN201710602572.0A patent/CN109279575A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342460A (en) * | 2019-05-29 | 2019-10-18 | 安徽青木子德慧能源发展有限公司 | A kind of reactor assembly based on formic acid cracking hydrogen with anti-overfoaming function |
| CN110342461A (en) * | 2019-05-29 | 2019-10-18 | 安徽青木子德慧能源发展有限公司 | A kind of reactor assembly and its starting method based on formic acid cracking hydrogen |
| CN114516667A (en) * | 2020-11-20 | 2022-05-20 | 中国石油天然气集团有限公司 | Reaction device for fixed bed cracking of oily wastewater for laboratory |
| CN112657431A (en) * | 2020-12-01 | 2021-04-16 | 安徽成泰医药科技有限公司 | Evacuating device for hydrogen production by methanol cracking |
| CN112748208A (en) * | 2020-12-29 | 2021-05-04 | 华中科技大学 | Online detection device for methanol cracking |
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Application publication date: 20190129 |