CN102925196A - Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler - Google Patents
Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler Download PDFInfo
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- CN102925196A CN102925196A CN2012103678879A CN201210367887A CN102925196A CN 102925196 A CN102925196 A CN 102925196A CN 2012103678879 A CN2012103678879 A CN 2012103678879A CN 201210367887 A CN201210367887 A CN 201210367887A CN 102925196 A CN102925196 A CN 102925196A
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Abstract
The invention provides an anti-coking device for a high-temperature pyrolysis gas inlet of an oil gas quench cooler. The anti-coking device is a hollow air inlet pipe. The anti-coking device has the technical key points that an oil gas outlet of the air inlet pipe is concentrically provided with an anti-coking steam ring pipe, a steam hole is formed on the anti-coking steam ring pipe, the oil gas outlet is sequentially provided with a distribution pipe and a distribution ring pipe from top to bottom, the anti-coking steam ring pipe is communicated with the distribution ring pipe through the distribution pipe, and a steam inlet is arranged on the distribution ring pipe. The anti-coking device has the advantages that after the existing quenching equipment is modified, the problem that an inlet of the quenching equipment is easy to coke can be solved, and the anti-coking device is remarkable in effect; the hydrocarbon partial pressure can be reduced, and the yield can be improved; and the anti-coking device does not need to be periodically stopped and overhauled, the production period can be prolonged, the production efficiency can be improved, and the production cost and the maintenance cost can be reduced.
Description
Technical field
The present invention relates to technical field of chemical, further relate to a kind of equipment that prevents the ingress coking of oil gas quencher high-temperature oil gas, further relate to a kind of anti-coking chilling heat-exchange equipment.
Background technology
Carbochain fracture or dehydrogenation reaction at high temperature occur in the hydrocarbon raw material that cracking refers to petroleum, generate the process of alkene and other product.Wherein to produce ethene, propylene as main, go back simultaneously the alkene such as by-product butylene, divinyl and pyrolysis gasoline, diesel oil, fuel wet goods product.Industrial realization scission reaction will reach following requirement: reactant is supplied with amount of heat, system is under the hot conditions; Because the residence time is short, so will make at short notice reaction mass obtain the amount of heat that reacts required, and reaction mass is lowered the temperature rapidly, i.e. quenching process; Owing to require low hydrocarbon partial pressure, so make up water in raw material hydrocarbon steam or other gas are as thinner.About 520 ℃ of the Pintsch process temperature degree that catalytic pyrolysis ethylene unit reaction member processed produces, it enters and must be introduced into the oil gas quencher before the follow-up unit and carry out chilling, cool the temperature to below 320 ℃, prevent because of splitting gas temperature height in equipment place cokings such as gas pipeline, Fractionator Bottoms.
The chilling of splitting gas mainly comprises direct quench (spray quenching oil or water) and indirect quench (quenching boiler).Its indirect quench is indirectly to contact with splitting gas by wall with cryogen, and splitting gas is cooled off rapidly.For the heat that reclaims Pintsch process gas comes generating steam, thermo-efficiency and reduction product cost to improve pyrolyzer generally adopt rapid-cooling heat exchanger to carry out indirect chilling.
Good quenching boiler should have: coking is few, for a long time continuous operation; Recyclable high pressure steam, thermo-efficiency is high, and economic performance is good; Simple in structure, mechanical problem is few, the characteristics such as good stability.But often there is following shortcoming in existing quenching boiler: the splitting gas temperature is higher in oil gas quencher high-temperature oil gas ingress, and sharply change, so coking is serious, stop up rapidly oil gas vent, the obstruction splitting gas passes through, cause the pressure drop of oil gas vent place to raise rapidly, and make the high-temperature oil gas skewness, cause whole quencher inhomogeneous cooling even, cracked gas is through fully cooling, and high boiling component is condensate in the heat transfer tube wall, carry out lentamente the dehydrogenation polycondensation, heaviness gradually becomes the material of tarry or coke shape in succession, and the rapid coking of whole equipment is blocked.Therefore need the repairing of regularly stopping work, whole device can't steady in a long-term move, and has improved production and maintenance cost.
Summary of the invention
For addressing the above problem, the invention provides a kind of oil gas quencher Pintsch process gas entrance coking device and a kind of anti-coking fast cooling device.
The present invention is achieved by the following technical solutions:
Oil gas quencher Pintsch process gas entrance coking device, described coking device is the hollow inlet pipe, it is characterized in that:
Oil gas vent place in inlet pipe arranges anti-scorch steam loop with one heart, on the anti-scorch steam loop steam hole is set, set gradually distribution pipe and distribution endless tube from top to bottom from oil gas vent, anti-scorch steam loop is communicated with by distribution pipe with the distribution endless tube, and the distribution endless tube is provided with the steam-in.
Described anti-scorch steam loop is the anti-scorch steam loop of multistage.
Described anti-scorch steam loop is 8 sections anti-scorch steam loops.
On every section of the described multistage steam loop 8 ~ 10 steam holes are set.
For reaching better anti-scorch effect, described anti-scorch steam loop plane is positioned under the oil gas vent plane, and the distance that arranges between anti-scorch steam loop plane and the oil gas vent end plane is 1/2 ~ 2/3 of anti-scorch steam loop inner ring radius.
For preventing other part cokings in the pipe, also can steam hole be set at described distribution pipe and/or distribution endless tube.
A kind of anti-coking fast cooling device, described fast cooling device bottom arranges above-mentioned coking device.
Compared with prior art, beneficial effect of the present invention is as follows: after existing fast cooling device is transformed, solved the easy coking problem of fast cooling device entrance, and effect is remarkable; Reduce hydrocarbon partial pressure, improved productive rate; Need not regular break-down maintenance, prolonged the production cycle, improved production efficiency, reduced production and maintenance cost.
Description of drawings
Fig. 1 is skeleton view of the present invention.
Fig. 2 is the diagrammatic cross-section of Figure 1A-A section.
The nomenclature of accompanying drawing major portion:
1. quenching boiler; 2. distribution endless tube; 3. distribution pipe; 4. anti-scorch steam loop; 5. oil gas vent; 6. steam hole; 7. steam-in.
The present invention is described in further detail by example below in conjunction with accompanying drawing, but following example only is the present invention's example wherein that do not represent the rights protection scope that the present invention limits, the scope of the present invention is as the criterion with claims.
Embodiment
The quenching boiler 1 of oil gas quencher Pintsch process gas entrance coking device is set such as Fig. 1 and of the present invention a kind of bottom shown in Figure 2, described coking device is the hollow inlet pipe, at oil gas vent 5 places of inlet pipe eight sections anti-scorch steam loops 4 are set with one heart, eight steam holes 6 are set on every section anti-scorch steam loop, set gradually eight vertical distribution pipes 3 from top to bottom from oil gas vent 5, the distribution endless tube 2 that be arranged in parallel with anti-scorch steam loop 4, distribution pipe 3 is distributed on the sky inlet pipe outer circumferential walls, anti-scorch steam loop 4 is communicated with by vertical distribution pipe 3 with distribution endless tube 2, and distribution endless tube 2 is provided with steam-in 7.
Steam is entered the distribution endless tube 2 of the coking device of quenching boiler 1 bottom by anti-scorch steam-in 7; then the steam hole 6 that enters behind eight sections anti-scorch steam loops 4 by arranging on the endless tube 4 along 8 vertical distribution pipes is emitted water vapor; the water vapor position that temperature variation is rapid is the oil gas vent covering protection; oil gas and the quenching oil of easy green coke can't directly be contacted with equipment, to reach the purpose that prevents coking.For reaching better anti-scorch effect, anti-scorch steam loop 4 planes are positioned under the oil gas vent plane, and the distance that arranges between anti-scorch steam loop 4 planes and terminal 5 planes of oil gas vent is 1/2 ~ 2/3 of anti-scorch steam loop 4 inner ring radiuses.
Also can steam hole be set at distribution pipe 3 and/or distribution endless tube 2, prevent other part cokings in the pipeline.
Catalytic heat cracking device is with the leading refining ﹠ chemical industry integration machinery of catalytic pyrolysis, high, the easily coking of its catalytic cracking hydrolysis products splitting gas temperature.Adopt embodiment 12 or protection domain of the present invention in other coking devices after, equipment is opened equipment inspection and is found that quencher oil gas vent 5 and whole equipment are without obvious coking after the operation (about 8000 hours) of a production cycle.The use of anti-scorch steam loop, but the cycle of operation of the fast cooling device that greatly prolongs, this anti-coke installation can be applied to any to water or water vapor no requirement (NR), and temperature is more than 230 ℃, gas phase or gas-liquid two-phase intersection anti-scorch.
Claims (4)
1. oil gas quencher Pintsch process gas entrance coking device, described coking device is the hollow inlet pipe, it is characterized in that: at the oil gas vent place of inlet pipe the anti-scorch steam loop of multistage is set with one heart, anti-scorch steam loop plane is positioned under the oil gas vent plane, distance between anti-scorch steam loop plane and the oil gas vent end plane is 1/2 ~ 2/3 of anti-scorch steam loop inner ring radius, on the anti-scorch steam loop of multistage steam hole is set, on every section of the multistage steam loop 8 ~ 10 steam holes are set, set gradually distribution pipe and distribution endless tube from top to bottom from oil gas vent, anti-scorch steam loop is communicated with by distribution pipe with the distribution endless tube, and the distribution endless tube is provided with the steam-in.
2. coking device according to claim 1, it is characterized in that: described anti-scorch steam loop is eight sections anti-scorch steam loops.
3. coking device according to claim 1 is characterized in that: on described distribution pipe and/or the distribution endless tube steam hole is set.
4. an anti-coking fast cooling device is characterized in that: the claims 1 to 4 each described coking device is set bottom the described fast cooling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367887.9A CN102925196B (en) | 2012-09-28 | 2012-09-28 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367887.9A CN102925196B (en) | 2012-09-28 | 2012-09-28 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
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| CN102925196A true CN102925196A (en) | 2013-02-13 |
| CN102925196B CN102925196B (en) | 2014-08-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105062561A (en) * | 2015-07-16 | 2015-11-18 | 陕西双翼石油化工有限责任公司 | Device and method for preventing catalytic cracking equipment from coking |
| CN112680243A (en) * | 2020-12-09 | 2021-04-20 | 金澳科技（湖北）化工有限公司 | Method for preventing settler from coking |
| CN116850914A (en) * | 2023-09-04 | 2023-10-10 | 江苏博颂能源科技有限公司 | Propane dehydrogenation device reactor roof prevents burnt steam ring |
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| US4248834A (en) * | 1979-05-07 | 1981-02-03 | Idemitsu Petrochemical Co. Ltd. | Apparatus for quenching pyrolysis gas |
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| WO2009025569A1 (en) * | 2007-07-31 | 2009-02-26 | Shapovalov Viacheslav Dmitriev | Method for producing synthesis gas and semi-coke from organic biomass and device for carrying out said method |
| JP2010209267A (en) * | 2009-03-12 | 2010-09-24 | Jfe Steel Corp | Production facility of molded coke |
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2012
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| US4248834A (en) * | 1979-05-07 | 1981-02-03 | Idemitsu Petrochemical Co. Ltd. | Apparatus for quenching pyrolysis gas |
| CN2081075U (en) * | 1990-10-18 | 1991-07-17 | 中国石油化工总公司 | Fast-cool heat-exchanger with big pipe diameter sleeve |
| CN2146655Y (en) * | 1993-02-19 | 1993-11-17 | 化工部化工机械研究院 | Secondary quenching boiler |
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| WO2009025569A1 (en) * | 2007-07-31 | 2009-02-26 | Shapovalov Viacheslav Dmitriev | Method for producing synthesis gas and semi-coke from organic biomass and device for carrying out said method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105062561A (en) * | 2015-07-16 | 2015-11-18 | 陕西双翼石油化工有限责任公司 | Device and method for preventing catalytic cracking equipment from coking |
| CN105062561B (en) * | 2015-07-16 | 2017-06-16 | 陕西双翼石油化工有限责任公司 | The device of catalyst cracker anti-coking and the method for anti-coking |
| CN112680243A (en) * | 2020-12-09 | 2021-04-20 | 金澳科技（湖北）化工有限公司 | Method for preventing settler from coking |
| CN116850914A (en) * | 2023-09-04 | 2023-10-10 | 江苏博颂能源科技有限公司 | Propane dehydrogenation device reactor roof prevents burnt steam ring |
| CN116850914B (en) * | 2023-09-04 | 2023-12-05 | 江苏博颂能源科技有限公司 | Propane dehydrogenation device reactor roof prevents burnt steam ring |
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| CN102925196B (en) | 2014-08-13 |
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