CN1686982A - Method for shock chilling gas of chloride of methane at high temperature in production of methyl chloride - Google Patents
Method for shock chilling gas of chloride of methane at high temperature in production of methyl chloride Download PDFInfo
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- CN1686982A CN1686982A CN 200510038992 CN200510038992A CN1686982A CN 1686982 A CN1686982 A CN 1686982A CN 200510038992 CN200510038992 CN 200510038992 CN 200510038992 A CN200510038992 A CN 200510038992A CN 1686982 A CN1686982 A CN 1686982A
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- methane
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Abstract
The present invention discloses a shock chilling method of high-temperature methane chloride gas in the production of methane chloride. Said high-temperature methane chloride gas at 360-450 deg.C is discharged from reactor, and fed into shock chilling tower from its bottmo portion, in the interior of tower the low-temperature hydrochloric acid is downwards sprayed from top portion, so that the high-temperature gas can directly contact with low-temperature material so as to implement heat transfer process and mass transfer process, the high-temperature gas is cooled, and low-temperature is evaporated, the temperature of gas discharged from shock chilling tower can reduced to 70-140 deg.C.
Description
Technical field
The present invention relates to the Quench method of high temperature methane chloride gas in a kind of methyl chloride production.
Background technology
Traditional thermal chlorination production technique generally adopts the method for cooling of air cooling to the high-temperature gas that reflects at present, this method equipment has high input, it is low by (0.01～0.05MPa) to produce pressure, throughput is little, simultaneously must be provided with the carbon black treatment unit, air-cooled the border is produced a large amount of thermal radiation, caused environmental thermal pollution.
Summary of the invention
The invention provides a kind of methyl chloride that overcomes as above problem produce in the Quench method of high temperature methane chloride gas.
The inventive method is to adopt the Quench technology, to come out from reactor, temperature enters quenching column at 360～450 ℃ high temperature methane chlorination gas from the bottom, low temperature dilute hydrochloric acid sprays from top in tower, high-temperature gas is directly contacted with low-temperature material, finish the process of heat and mass transfer, pyritous gas is cooled, cryogenic material is evaporated, and reduces to 70～140 ℃ from the gas temperature that quenching column comes out.
Present method and traditional method relatively have following advantage:
1, equipment volume is little.Traditional method will drop to about 100 ℃ from 380～450 ℃ with high-temperature gas, and because of the gas heat-transfer coefficient is little, required heat interchanging area is very big, causes equipment huge, and floor space is big during equipment layout; Present method high-temperature gas directly contacts with low-temperature material, finishes the process of heat and mass transfer, and quenching column only provides their places of carrying out heat and mass transfer, so the required equipment volume is little,
2, unit efficiency height.Traditional method unit surface processing power is little, and efficient is low; Present method is because of the heat transfer efficiency height, so the unit surface processing power is big.
3, require low to the material heatproof.The traditional method equipment material will bear 380～450 ℃ height, and present method is directly to contact with low-temperature material because of high-temperature material, equipment material withstand temp low (＜300 ℃).
4, throughput is big.The traditional method equipment material is limited by pyritous, can not bear high pressure, and (0.01～0.05MPa), throughput is little so produced in conventional processes pressure is low; Adopt present method, under this temperature equipment material can bear high pressure (0.3～1.0MPa), so throughput is big.
5, flow process is short, reduced investment.Behind the traditional method reaction gas air cooling, also must remove the by product carbon black of reaction etc.; And present method is spraying from top with low-temperature material, when directly contacting with high-temperature gas, by product is washed.Thereby economize the equipment of the by product carbon black of removing reaction, shortened flow process, reduced investment.
6, little to environmental influence.Traditional method cooling heat-transfer medium is to use air, has so just produced a large amount of thermal radiation to environment; Present method is to adopt self cryogenic liquid phase material and high-temperature gas to carry out heat exchange, does not need other medium, and is little to environmental influence.
Embodiment
Raw material methyl chloride, carrier gas enter reactor with chlorine after mixing, under 380～450 ℃ high temperature, react, the hot-gas temperature that reflects is at 380～450 ℃, enter the quenching column Quench, be that reaction gas enters quenching column from the bottom, from the back system condensation material hydrochloric acid with being pumped to tower top, spray from top; In the tower bottom, high-temperature gas directly contacts with low-temperature material, and cryogenic material is evaporated; Tower top, gas contacts with the spray material, finishes the process of heat transfer, reduces to 80～130 ℃ from the gas temperature that quenching column comes out.
Claims (1)
1, the Quench method of high temperature methane chloride gas during methyl chloride is produced, to come out from reactor, temperature enters quenching column at 360～450 ℃ high temperature methane chlorination gas from the bottom, low temperature dilute hydrochloric acid sprays from top in tower, high-temperature gas is directly contacted with low-temperature material, finish the process of heat and mass transfer, pyritous gas is cooled, cryogenic material is evaporated, and reduces to 70～140 ℃ from the gas temperature that quenching column comes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038992 CN1686982A (en) | 2005-04-21 | 2005-04-21 | Method for shock chilling gas of chloride of methane at high temperature in production of methyl chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038992 CN1686982A (en) | 2005-04-21 | 2005-04-21 | Method for shock chilling gas of chloride of methane at high temperature in production of methyl chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1686982A true CN1686982A (en) | 2005-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510038992 Pending CN1686982A (en) | 2005-04-21 | 2005-04-21 | Method for shock chilling gas of chloride of methane at high temperature in production of methyl chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1686982A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429194C (en) * | 2006-09-28 | 2008-10-29 | 南京大学 | Method for utilizing reaction heat in process of producing methane chloride and purifying mixture |
-
2005
- 2005-04-21 CN CN 200510038992 patent/CN1686982A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429194C (en) * | 2006-09-28 | 2008-10-29 | 南京大学 | Method for utilizing reaction heat in process of producing methane chloride and purifying mixture |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |