CN203393062U - Device for preparing chloroethylene by cracking dichloroethane - Google Patents
Device for preparing chloroethylene by cracking dichloroethane Download PDFInfo
- Publication number
- CN203393062U CN203393062U CN201320404256.XU CN201320404256U CN203393062U CN 203393062 U CN203393062 U CN 203393062U CN 201320404256 U CN201320404256 U CN 201320404256U CN 203393062 U CN203393062 U CN 203393062U
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- vaporizer
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- ethylene dichloride
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Abstract
The utility model relates to a device for preparing chloroethylene and provides a device for preparing chloroethylene by cracking dichloroethane. The device comprises a cracking furnace composed of a convection section at the upper part and a radiation section at the lower part, an evaporator and a steam manifold, wherein a convection section heating pipe is arranged in the convection section, a radiation section heating pipe is arranged in the radiation section, the evaporator is arranged above the steam manifold, the evaporator is connected with the steam manifold through an ascension pipe and a downcomer, the liquid phase inlet of the steam manifold is connected with the outlet of the convection section heating pipe, the inlet of the convection section heating pipe is connected with a dichloroethane storage tank, the steam phase outlet of the steam manifold is connected with the inlet of the radiation section heating pipe, the outlet of the radiation section heating pipe is connected with the hot material inlet of a heating coil, and the outlet of the heating coil is connected with a subsequent cooling device. The device provided by the utility model can be used for effectively recycling heat energy, prolonging the decoking period from 6 months per time to 10 months per time, greatly reducing the decoking workload and increasing the capacity of the device.
Description
Technical field
The utility model relates to a kind of device of preparing vinylchlorid.
Background technology
At present, the domestic ethylene dichloride cracking with energy recovery technology from external introduction, for the device of vinylchlorid, is all to arrange single boiler tube in pyrolyzer, and a pyrolyzer is joined an ethylene dichloride superheater, 2 energy-efficient equipments of an ethylene dichloride vaporizer.Ethylene dichloride superheater is double-pipe exchanger, and easily the coking because of ethylene dichloride causes line clogging to affect production run.
Therefore, many companies adopt the ethylene dichloride cracker of German UHDE technology all to stop using ethylene dichloride superheater.The ethylene dichloride horizontal-type evaporator of this technology is comprised of two parts, and bottom is vaporizer, and top is drum, by upcast, is connected with downtake, and upcast also plays supporting drum.The feature of this ethylene dichloride horizontal-type evaporator is that vaporizer separates with drum, and evaporating space is large, and gas, liquid ethylene dichloride circulation resistance is little, and liquid fluctuating scope is little, easily red-tape operati.But shortcoming is vaporizer shell side is covered with serpentine tube, and shell side bottom space is little, particularly, when stopping, coke cleaning operational difficulties, adds that serpentine tube has part to be M shape, easily causes coke cleaning not thorough, leaves dead angle, has shortened the production run cycle of pyrolyzer.
Utility model content
The purpose of this utility model is to provide a kind of ethylene dichloride cracking for the device of vinylchlorid, the above-mentioned defect existing to overcome prior art.
Ethylene dichloride cracking of the present utility model, for the device of vinylchlorid, comprising:
The pyrolyzer, vaporizer and the drum that by the convection zone on top and the radiation section of bottom, are formed;
In described convection zone, be provided with heating tube in section of convection chamber, in described radiation section, be provided with radiation section heating tube;
Described vaporizer is arranged on the top of described drum, and vaporizer is connected with downtake by upcast with drum;
The liquid phase entrance of described drum is connected by pipeline with described heating tube in section of convection chamber outlet, and heating tube in section of convection chamber entrance is connected with ethylene dichloride storage tank;
The vapor phase exit of described drum is connected by pipeline with radiation section heating tube entrance, and the outlet of radiation section heating tube is connected with the thermal material entrance that is arranged on the heating coil in vaporizer, and heating coil outlet is connected by pipeline with follow-up refrigerating unit.
The utility model, has cancelled the ethylene dichloride superheater of original device, moves in convection section in cracking furnace the ethylene dichloride of gas phase is overheated, like this can be by burning to remove Jiao that in pipeline, by-product generates.
Use of the present utility model, 500 ℃ of ethylene dichloride splitting gases are by after vaporizer, and splitting gas temperature enters quench tower again after being down to 278 ℃, effectively reclaimed the heat energy of former waste, and the average quantity used in unit volume blasted of fuel gas drops to 69Kg/t-vcm from 110Kg/t-vcm.Approximately 4,000 ten thousand yuan of year economic benefits.Feeding manner after heat exchange has reduced coking speed in pipe, the coke cleaning period of device by October in June/time extend to/time, greatly reduced the workload of coke cleaning, increased the production capacity of installing.
Accompanying drawing explanation
Fig. 1 is that ethylene dichloride cracking is for the apparatus structure schematic diagram of vinylchlorid.
Embodiment
Referring to Fig. 1, ethylene dichloride cracking of the present utility model, for the device of vinylchlorid, comprising:
The pyrolyzer 1, vaporizer 2 and the drum 3 that by the radiation section 103 of the convection zone 101He bottom on top, are formed;
In described convection zone 101, be provided with heating tube in section of convection chamber 102, in described radiation section 103, be provided with radiation section heating tube 104;
Described vaporizer 2 is arranged on the top of described drum 3, and vaporizer 2 is connected with downtake 5 by upcast 4 with drum 3;
The liquid phase entrance 301 of described drum 3 is connected by pipeline with described heating tube in section of convection chamber outlet 1021, and heating tube in section of convection chamber entrance 1022 is connected with ethylene dichloride storage tank;
The vapor phase exit 302 of described drum is connected by pipeline with radiation section heating tube entrance 1041, radiation section heating tube outlet 1042 is connected with the thermal material entrance 2011 that is arranged on the heating coil 201 in vaporizer 2, and heating coil outlet 2012 is connected by pipeline with follow-up refrigerating unit.
Preferably, be arranged on heating coil 201 in vaporizer 2 for U pipe, avoid the appearance of M shape, be conducive to hydraulic decoking.
Preferably, the spacing between vaporizer 2 and drum 3 is 2.5～3 meters, is conducive to thermal cycling and the gas-liquid separation of ethylene dichloride.
Claims (3)
1. ethylene dichloride cracking is for the device of vinylchlorid, comprise: the pyrolyzer (1) being formed by the convection zone (101) on top and the radiation section (103) of bottom, in described convection zone (101), be provided with heating tube in section of convection chamber (102), in described radiation section (103), be provided with radiation section heating tube (104); It is characterized in that, also comprise vaporizer (2) and drum (3);
Described vaporizer (2) is arranged on the top of described drum (3), and vaporizer (2) is connected with downtake (5) by upcast (4) with drum (3);
The liquid phase entrance (301) of described drum (3) exports (1021) with described heating tube in section of convection chamber and is connected by pipeline, and heating tube in section of convection chamber entrance (1022) is connected with ethylene dichloride storage tank;
The vapor phase exit of described drum (302) is connected by pipeline with radiation section heating tube entrance (1041), radiation section heating tube outlet (1042) is connected with the thermal material entrance (2011) that is arranged on the heating coil (201) in vaporizer (2), and heating coil outlet (2012) is connected by pipeline with follow-up refrigerating unit.
2. ethylene dichloride cracking according to claim 1, for the device of vinylchlorid, is characterized in that, the heating coil (201) being arranged in vaporizer (2) is U pipe.
3. ethylene dichloride cracking according to claim 1 and 2, for the device of vinylchlorid, is characterized in that, the spacing between vaporizer (2) and drum (3) is 2.5～3 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320404256.XU CN203393062U (en) | 2013-07-08 | 2013-07-08 | Device for preparing chloroethylene by cracking dichloroethane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320404256.XU CN203393062U (en) | 2013-07-08 | 2013-07-08 | Device for preparing chloroethylene by cracking dichloroethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203393062U true CN203393062U (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320404256.XU Expired - Lifetime CN203393062U (en) | 2013-07-08 | 2013-07-08 | Device for preparing chloroethylene by cracking dichloroethane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203393062U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630998A (en) * | 2018-06-25 | 2019-12-31 | 中国石化工程建设有限公司 | Heat exchange process and heat exchange system of ethylene cracking furnace |
-
2013
- 2013-07-08 CN CN201320404256.XU patent/CN203393062U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630998A (en) * | 2018-06-25 | 2019-12-31 | 中国石化工程建设有限公司 | Heat exchange process and heat exchange system of ethylene cracking furnace |
| CN110630998B (en) * | 2018-06-25 | 2021-07-16 | 中国石化工程建设有限公司 | Heat exchange process and heat exchange system of ethylene cracking furnace |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |