CN201376946Y - Cracking furnace for preparing vinyl chloride with dichloroethane as raw material - Google Patents
Cracking furnace for preparing vinyl chloride with dichloroethane as raw material Download PDFInfo
- Publication number
- CN201376946Y CN201376946Y CN200920069742U CN200920069742U CN201376946Y CN 201376946 Y CN201376946 Y CN 201376946Y CN 200920069742 U CN200920069742 U CN 200920069742U CN 200920069742 U CN200920069742 U CN 200920069742U CN 201376946 Y CN201376946 Y CN 201376946Y
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- cracking
- cracking tube
- cracking furnace
- pyrolyzer
- tube
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- 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
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Abstract
The utility model relates to a cracking furnace, which provides the cracking furnace for preparing vinyl chloride with dichloroethane as raw material; the cracking furnace comprises a furnace body and a cracking tube, the cracking tube is arranged in the cracking furnace body, the cracking tube is the variable-diameter tube, diameter of an import is smaller than diameter of an export. The cracking furnace is used for preparing vinyl chloride, which not only achieves energy-saving effect but also greatly improves feeding amount of the cracking furnace, and reduces use amount of fuel gas, not only increases output but also reduces energy consumption. When C4 is used as fuel, use amount of fuel gas is reduced from the previous 110kg/t-vcm to 68kg/t-vcm, meanwhile, vinyl chloride output is also increased by about 15%, decoking cycle of the cracking furnace is extended from original 4-5 months to 8-10 months.
Description
Technical field
The utility model relates to a kind of pyrolyzer.
Background technology
As everyone knows, vinylchlorid is a kind of important chemical material, is raw material with the ethylene dichloride, and Pintsch process obtains vinylchlorid, is industrial modal method.
At present, described method, in pyrolyzer, realize, cleavage method comprises the steps: gaseous state or liquid raw material ethylene dichloride are fed in the radiation section of pyrolyzer, under the pressure of 470～500 ℃ and 1.9～2.0Mpa, carry out cracking, obtain vinylchlorid and hydrogenchloride, separate then, obtain product vinylchlorid.
Chinese patent application number application (patent) number: 200680050903.4, a kind of method for preparing vinylchlorid is disclosed, described method comprises: add chlorine and ethane in the ethane chlorination reaction region that is arranged on the pyrolysis reactor bottom that wherein has solids; By being contacted with solids with ethane, chlorine carries out ethane chlorination reaction, so that the product of ethane chlorination reaction and solids rise the top to pyrolysis reactor simultaneously, and make the sedimentation of coke that in the ethane chlorination reaction process, produces on solids; With 1, the 2-ethylene dichloride is added in the pyrolysis reaction region that is arranged on pyrolysis reactor top; By the product and 1 that makes ethane chlorination reaction, the 2-ethylene dichloride contacts with solids and carry out pyrolytic reaction in pyrolysis reaction region, so that the product of ethane chlorination reaction, 1,2-ethylene dichloride and solids rise simultaneously, and make the sedimentation of coke that produces in the pyrolytic reaction process on solids; In regeneration reactor, make solid particle regeneration by the coke of burnt deposit on solids; And the solids that will collect the heat that is produced by combustion of coke are added in the pyrolysis reactor again.
Though described method can improve productive rate and suppress the generation of coke, but, identical with traditional method, have an obvious defects, in the cracking tube, the resistance of material is big, pressure difference between the import of cracking tube and the outlet is bigger, not only influence production efficiency, and increased energy consumption, be unfavorable for energy-conservation.
Summary of the invention
It is the pyrolyzer of feedstock production vinylchlorid with the ethylene dichloride that the purpose of this utility model provides a kind of, to overcome the above-mentioned defective that prior art exists.
Pyrolyzer of the present utility model comprises pyrolyzer body of heater 1 and cracking tube 2, and described cracking tube 2 is arranged in the pyrolyzer body of heater 1, it is characterized in that, described cracking tube 2 is for becoming diameter tube, and the diameter of import 201 is less than the diameter of outlet 201.
The utility model is operation like this:
With temperature is that 245～265 ℃, pressure are that the gasiform ethylene dichloride of 2.9～3.5Mpa feeds in the radiation section of pyrolyzer, under 470～500 ℃, carry out cracking, the vinylchlorid that obtains after the cracking and the mixture of hydrogenchloride, be sent to later separation workshop section, the residence time of material in cracking tube is 20～30 seconds, the linear velocity of material in the cracking tube exit is 25～35 meter per seconds, and material is 0.9～1.5Mpa in the difference of the pressure in the pressure of the ingress of cracking tube and exit.
Adopt pyrolyzer of the present utility model to prepare vinylchlorid, not only reach energy-conservation effect, the inlet amount of pyrolyzer also is greatly improved simultaneously, and the consumption of fuel gas also descends to some extent, has not only increased output but also reduced energy consumption.When with C
4During for fuel, the consumption of fuel gas from before 110kg/t-vcm dropped to 68kg/t-vcm, simultaneously, vinylchlorid output has also increased about 15%, the coke cleaning period of pyrolyzer extended to 8～10 months by original 4～5 months.
Description of drawings
Fig. 1 is a pyrolyzer structural representation of the present utility model.
Fig. 2 is the cracking tube structural representation.
Embodiment
Referring to Fig. 1 and Fig. 2, pyrolyzer of the present utility model comprises pyrolyzer body of heater 1 and cracking tube 2, and described cracking tube 2 is arranged in the pyrolyzer body of heater 1, it is characterized in that, described cracking tube 2 is for becoming diameter tube, and the diameter of import 201 is less than the diameter of outlet 201.
Preferably, described cracking tube 2 is connected and composed mutually by the branch cracking tube 203 of 2～4 different diameters, and preferred 3, the diameter of described minute cracking tube 203 is from import 201, increases successively, increases than being 40～60%;
Described increase ratio is the ratio of the diameter of the diameter of a back branch cracking tube 203 and previous minute cracking tube 203.
Preferably, divide the equal in length of cracking tube 203, described diameter is an internal diameter.
Preferably, the import 201 of cracking tube 2 is arranged on the top of pyrolyzer body of heater 1, and the outlet of separating pipe 2 is arranged on the bottom of pyrolyzer body of heater 1.
Claims (4)
1. with the ethylene dichloride pyrolyzer of feedstock production vinylchlorid, comprise pyrolyzer body of heater (1) and cracking tube (2), described cracking tube (2) is arranged in the pyrolyzer body of heater (1), it is characterized in that, described cracking tube (2) is for becoming diameter tube, and the diameter of import (201) is less than the diameter of outlet (201).
2. according to claim 1 is the pyrolyzer of feedstock production vinylchlorid with the ethylene dichloride, it is characterized in that, described cracking tube (2) is connected and composed mutually by the branch cracking tube (203) of 2～4 different diameters, described minute cracking tube (203) diameter from import (201), increase successively, increase than being 40～60%.
3. according to claim 2 is the pyrolyzer of feedstock production vinylchlorid with the ethylene dichloride, it is characterized in that, described cracking tube (2) is connected and composed mutually by the branch cracking tube (203) of 3 different diameters.
4. according to claim 1 is the pyrolyzer of feedstock production vinylchlorid with the ethylene dichloride, it is characterized in that, the import (201) of cracking tube (2) is arranged on the top of pyrolyzer body of heater (1), and the outlet of cracking tube (2) is arranged on the bottom of pyrolyzer body of heater (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920069742U CN201376946Y (en) | 2009-03-31 | 2009-03-31 | Cracking furnace for preparing vinyl chloride with dichloroethane as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920069742U CN201376946Y (en) | 2009-03-31 | 2009-03-31 | Cracking furnace for preparing vinyl chloride with dichloroethane as raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201376946Y true CN201376946Y (en) | 2010-01-06 |
Family
ID=41517049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920069742U Expired - Lifetime CN201376946Y (en) | 2009-03-31 | 2009-03-31 | Cracking furnace for preparing vinyl chloride with dichloroethane as raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201376946Y (en) |
-
2009
- 2009-03-31 CN CN200920069742U patent/CN201376946Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100106 |
|
| CX01 | Expiry of patent term |