CN103173241A - Control method for preventing quenching oil of diluted steam generation heat exchanger from entering process water system - Google Patents
Control method for preventing quenching oil of diluted steam generation heat exchanger from entering process water system Download PDFInfo
- Publication number
- CN103173241A CN103173241A CN2013101233288A CN201310123328A CN103173241A CN 103173241 A CN103173241 A CN 103173241A CN 2013101233288 A CN2013101233288 A CN 2013101233288A CN 201310123328 A CN201310123328 A CN 201310123328A CN 103173241 A CN103173241 A CN 103173241A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- process water
- quenching oil
- steam generation
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a control method for preventing the quenching oil of a diluted steam generation heat exchanger from entering a process water system. After high-temperature quenching oil rises to 1.2MPa through a quenching oil pump, and the inlet pressure of a heat exchanger is controlled at 0.5MPa by adjusting the opening of an inlet stop valve of the diluted steam generation heat exchanger; after the heat exchange of the diluted steam generation heat exchanger, the quenching oil returns to an oil washing tower through an outlet stop valve of the heat exchanger, and the outlet pressure of the stop valve is controlled at 0.4MPa; the pressure difference between the front of the inlet stop valve and the front of the outlet stop valve of the heat exchanger is controlled at 0.6-0.8MPa; the process water enters the heat exchanger from the stop valve through a process water pump at an inlet pressure of 0.8MPa; and the process water after heat exchanger enters a diluted steam system through the stop valve at a pressure of 0.56-0.6MPa. The process design is reasonable, the probability of the quenching oil entering the process water is obviously reduced, the heat exchange effect of the heat exchanger is improved, the process water system operates normally, the operation cycle of the device is prolonged, and * million yuan is created for a factory each year.
Description
Technical field
The present invention relates to a kind ofly prevent that dilution steam generation generation interchanger quenching oil from scurrying into the process water system control method.
Background technology
Jilin Petrochemical company ethylene plant's ethylene unit is the large-scale modernization device that domestic first hand adopts German woods moral patented technology to build, and the scale of establishing is 300,000 ton/years of ethene, break ground in November, 1993, and a chemical industry start-of-run success on September 16th, 1996.Calendar year 2001 has carried out first phase and has tapped the potential and upgrade technologically, and makes throughput reach 380,000 ton/years of ethene by a newly-built ethane cracking furnace.Complete reconstruction and extension project for the second time 2004 in October, 2005, and plant capacity reaches 700,000 ton/years of ethene.
The ethylene unit sulfur-bearing cracking stocks such as hydrogenation tail oil, chemical industry light oil and petroleum naphtha external from the battery limit (BL) is stored in raw material storage tank, and raw material enters pyrolyzer through after preheating.After the Pintsch process reaction, be admitted to quenching system in pyrolyzer.Quenching system is the quenching oil of 200 ℃ with temperature, is sent by pumping to dilution steam generation generation interchanger, and process water evaporation is produced dilution steam generation, and then returns to pyrolyzer and enter pyrolyzer carry out Pintsch process together with cracking stock.
Ethylene unit process water pH value is controlled between 7.5-9.5, higher owing to containing sulphur content in cracking stock, can cause the process water pH value short period of time is 6 left and right, interchanger corrosion problem, tube bank is leaked, cause quenching oil to scurry into process water, affected the interchanger heat transfer effect, affected again the smooth running of device technique water system.
Problem in view of above-mentioned existence, invented a kind of prevent that dilution steam generation generation interchanger from occur leaking after, quenching oil is scurried into the control method in process water, the minimizing quenching oil is scurried into the probability in process water, improve the interchanger heat transfer effect, assurance device process water system normal operation, the extension fixture overall operation cycle.
Summary of the invention
The object of the invention is to solve the problem that prior art exists, provide a kind of and prevent that dilution steam generation generation interchanger quenching oil from scurrying into the process water system control method, improve the interchanger heat transfer effect, assurance device process water system normal operation, extension fixture overall operation cycle.
Technical scheme of the present invention is: a kind ofly prevent that dilution steam generation generation interchanger quenching oil from scurrying into the process water system control method, after high-temperature quenching oil boosts to 1.2MPa by the chilling oil pump, cut valve opening by adjusting dilution steam generation generation heat exchanger entrance, make the heat exchanger entrance pressure-controlling at 0.5MPa; Quenching oil cuts valve through described heat exchanger exit and returns to oil scrubber after entering the heat exchange of dilution steam generation generation interchanger, cuts the valve outlet port pressure-controlling at 0.4MPa; Described heat exchanger entrance is controlled at 0.6-0.8Mpa with the front pressure reduction of outlet section valve before cutting valve; Process water enters interchanger through cutting valve with the 0.8MPa inlet pressure by the technique water pump, and the process water after heat exchange enters Dilution steam system through cutting valve with 0.56-0.6MPa pressure.
The present invention compared with prior art has outstanding substantive distinguishing features and marked improvement: process technology scheme design science is reasonable, process water enters before described interchanger pressure and enters pressure before interchanger greater than quenching oil, therefore, both that dilution steam generation generation interchanger leaks, process water leaks in quenching oil, can not have influence on device and steadily produce and the interchanger heat transfer effect.Use through Jilin Petrochemical company ethylene plant ethene workshop Dilution steam generator and facts have proved, obviously the minimizing quenching oil is scurried into the probability in process water, improve the interchanger heat transfer effect, assurance device process water system normal operation, in the extension fixture overall operation cycle, can save 1,000,000 yuan of wound effects every year for factory.
Description of drawings
Fig. 1 is the embodiment of the present invention 1 process flow diagram.
In figure, 1, oil scrubber; 2, chilling oil pump; 3, dilution steam generation generation interchanger; 4, Dilution steam system; 5, technique water pump.
Embodiment
Now also by reference to the accompanying drawings the present invention is further described as follows by embodiment.
Embodiment:
See Fig. 1, prevent that dilution steam generation generation interchanger quenching oil from scurrying into the process water system control method, after high-temperature quenching oil boosts to 1.2MPa by chilling oil pump 2, cut valve opening by adjusting dilution steam generation generation interchanger 3 entrances, make interchanger 3 inlet pressure control at 0.5MPa; After quenching oil enters 3 heat exchange of dilution steam generation generation interchanger, cut valve through described heat exchanger exit and return in oil scrubber 1, cut the valve outlet port pressure-controlling at 0.4MPa; Described heat exchanger entrance is controlled at 0.6-0.8Mpa with the front pressure reduction of outlet section valve before cutting valve; Process water enters interchanger through cutting valve with the 0.8MPa inlet pressure by technique water pump 5, and the process water after heat exchange enters Dilution steam system 4 through cutting valve with 0.56MPa pressure.
Claims (1)
1. one kind prevents that dilution steam generation generation interchanger quenching oil from scurrying into the process water system control method, after high-temperature quenching oil boosts to 1.2MPa by the chilling oil pump, cut valve opening by adjusting dilution steam generation generation heat exchanger entrance, make the heat exchanger entrance pressure-controlling at 0.5MPa; Quenching oil cuts valve through heat exchanger exit and returns in oil scrubber after entering the heat exchange of dilution steam generation generation interchanger, cuts the valve outlet port pressure-controlling at 0.4MPa; Heat exchanger entrance is controlled at 0.6-0.8Mpa with the front pressure reduction of outlet section valve before cutting valve; Process water enters interchanger through cutting valve with the 0.8MPa inlet pressure by the technique water pump, and the process water after heat exchange enters Dilution steam system through cutting valve with 0.56-0.6MPa pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101233288A CN103173241A (en) | 2013-04-11 | 2013-04-11 | Control method for preventing quenching oil of diluted steam generation heat exchanger from entering process water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101233288A CN103173241A (en) | 2013-04-11 | 2013-04-11 | Control method for preventing quenching oil of diluted steam generation heat exchanger from entering process water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103173241A true CN103173241A (en) | 2013-06-26 |
Family
ID=48633444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101233288A Pending CN103173241A (en) | 2013-04-11 | 2013-04-11 | Control method for preventing quenching oil of diluted steam generation heat exchanger from entering process water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103173241A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457342A (en) * | 2014-11-12 | 2015-03-25 | 新奥科技发展有限公司 | Heat exchanger control method and heat exchanger |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323553A (en) * | 2007-06-13 | 2008-12-17 | 中国石油天然气股份有限公司 | Method for increasing temperature of ethylene unit quenching oil tower bottom |
-
2013
- 2013-04-11 CN CN2013101233288A patent/CN103173241A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323553A (en) * | 2007-06-13 | 2008-12-17 | 中国石油天然气股份有限公司 | Method for increasing temperature of ethylene unit quenching oil tower bottom |
Non-Patent Citations (1)
| Title |
|---|
| 汤忠民: "稀释蒸汽发生器管口泄漏原因分析和对策", 《石油化工技术与经济》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457342A (en) * | 2014-11-12 | 2015-03-25 | 新奥科技发展有限公司 | Heat exchanger control method and heat exchanger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103920384A (en) | Equipment for absorbing high-concentration nitric oxides by adopting normal-pressure process | |
| CN109879567B (en) | System and method for dealing with sudden power failure accident of sludge supercritical water oxidation device | |
| CN103173241A (en) | Control method for preventing quenching oil of diluted steam generation heat exchanger from entering process water system | |
| CN203229479U (en) | Improved control system capable of preventing diluted steam and quenching oil from escaping into process water | |
| CN112082398B (en) | Induced injection type waste heat step recovery device based on predictive control | |
| CN203976576U (en) | Kitchen waste water treatment system | |
| CN203768039U (en) | Intercooled closed type recirculating cooling water system for calcium carbide furnace | |
| CN202002072U (en) | Thermal system | |
| CN104934080B (en) | A kind of pair of main feed system of reactor of nuclear power plant | |
| CN102506413B (en) | Desalted water high-pressure oxygen removing method capable of utilizing low-temperature heat of catalytic cracking device | |
| CN204601952U (en) | A kind of ammonia recycling device | |
| CN210982064U (en) | Water pressure test device for supercritical boiler reheater | |
| CN204345765U (en) | Air-cooled Unit high back pressure circulating water heating double parallel operational system | |
| CN204370165U (en) | Nervous HEAT SETTING system | |
| CN205024149U (en) | Two steam pocket coke oven tedge waste heat recovery utilize system | |
| CN202900333U (en) | Steam-exhausting condensation recovery system of multi-steam turbine | |
| CN204760045U (en) | Main feed system in two core power stations | |
| CN104697357A (en) | Intelligent vacuum-absorption micropressure steam heat energy advanced recycling system | |
| CN104864765A (en) | Vacuum water-feeding system of cooling tower | |
| CN204737753U (en) | Ammonia nitrogen is washed water and is synthesized cyclic utilization device | |
| CN216653494U (en) | Low-pressure steam condensate recovery processing device in formaldehyde workshop section | |
| CN103342807A (en) | Stable structure of polyester process tower | |
| CN214809922U (en) | Device for preventing high-concentration liquid caustic soda in low-temperature environment from being blocked | |
| CN203702276U (en) | Low-pressure steam recycling device | |
| CN204063652U (en) | For the conduction oil discharge treating system of groove type solar thermo-power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| 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 |
Application publication date: 20130626 |