CN102698458A - Method for reducing emission and recycling atmospheric pollutants in emptying and cleaning process of chemical plant installations - Google Patents
Method for reducing emission and recycling atmospheric pollutants in emptying and cleaning process of chemical plant installations Download PDFInfo
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- CN102698458A CN102698458A CN2012101350268A CN201210135026A CN102698458A CN 102698458 A CN102698458 A CN 102698458A CN 2012101350268 A CN2012101350268 A CN 2012101350268A CN 201210135026 A CN201210135026 A CN 201210135026A CN 102698458 A CN102698458 A CN 102698458A
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Abstract
The invention relates to a method for reducing emission and recycling atmospheric pollutants in emptying and cleaning process of chemical plant installations. A pipeline is spanned outside an installation to be cleaned to form a circulating gas circuit; and the mass transfer and heat transfer efficiency of steam blowing are improved and loads needed by condensing equipment are reduced in such a manner of circulating steam heating gasification integrated shunting and condensation; and therefore, organic matters left by the installation after return of material is recycled in liquid form. The method provided by the invention greatly reduces the requirement of the processing capability of the condensation system, realizes emission reduction and recycling of the atmospheric pollutants in the emptying and cleaning process of the chemical plant installations at low cost, and simultaneously solves the problem of direct emission of partial installations in the blowing process due to lack of the recycling device.
Description
Technical field
The present invention relates to cleaner production, field of environment protection; Cleaner production, the resource that relates to industries such as accumulating such as petrochemical industry, chemical, chemical pharmacy, organic materials, oil product reclaims, pollution emission reduction, especially relates to a kind of chemical plant installations emptying cleaning process atmosphere pollution that is used for and reduces discharging the method that reclaims.
Background technology
All kinds of is the device of material with the organic matter, need carry out the care and maintenance of system like chemical reaction, separation and storage and transportation apparatus etc. after a period of time in operation, and common step is parking, the material returned, cleaning, emptying, the inner detection, device checking maintenance etc.After the liquid material material returned; Device is inner inevitably to exist some because of former thereby residual materials such as adhesions; As far as device such as packed tower or catalysis, heat exchange, the residual quantity of the inner organic materials of device is considerable after the material returned, as handles and badly will cause the serious environmental pollution problem.What present most device cleaned employing is washing, and the mode of steam blowing is come the inner residual material of cleaning plant, and safeguarding for follow-up device inspection provides basic condition.In the cleaning process, partial material can flow out equipment with the form of liquid with current in hot water wash process, and remainder then can purge the form device for transferring of gasification back with gas phase because of Steam Heating.In most cases, this part gas phase exhaust is direct emptying or handles the back through flare system and discharge, and recovery of flare system at present and purification efficiency homogeneous phase are when limited.During therefore above sight, the cleaning process of device has been lost material resource on the one hand, causes air pollution emission on the other hand.At present, also there are some new devices to be provided with condensing unit, condensation is carried out in the steam blowing exhaust at scavenging pipeline; The recovery section material; But because employing at present is interim static high pressure steamed tower, the mode of intermittent pressure release exhaust purges, because device interior does not in most cases have macroscopical air current flow; Therefore mass transfer rate is also lower; Process length consuming time, and the instantaneous emission flow of step-down exhaust process is big, and the condensing unit of the very big specification of need could satisfy the demand of high-efficiency condensation; The condenser system that existing process units sets can't satisfy required burden requirement usually, and the condensing unit of newly-built big specification is then because of utilizing the Technological Economy type problem of leaving unused etc. to be difficult to obtain implement at ordinary times.
Summary of the invention
The object of the invention is exactly to provide a kind of chemical plant installations emptying cleaning process atmosphere pollution that is used for to reduce discharging the method that reclaims for the defective that overcomes above-mentioned prior art existence; Adopt the mode of the integrated shunting condensation of vapor recycle heating and gasifying to improve the efficient of steam blowing mass transfer, heat transfer and reduce the required load of condensing plant; The residual organic matter that this method can be applicable to the emptying cleaning process of industry devices such as petrochemical industry, chemical, chemical pharmacy and organic materials, oil storage and transportation reclaims, and reduces the atmosphere pollution gas purging.
The object of the invention can be realized through following technical scheme:
Be used for chemical plant installations emptying cleaning process atmosphere pollution and reduce discharging the method that reclaims; Outside device to be cleaned, set up pipeline and form the recyclegas loop; And the mode that adopts the integrated shunting condensation of vapor recycle heating and gasifying improves the efficient of steam blowing mass transfer, heat transfer and reduces the required load of condensing plant, thereby with residual organic after the material returned of liquid form retracting device.
This method specifically may further comprise the steps:
(1) through blind flange, valve etc. with partitions such as the extraneous pipeline that is connected of all and device, passages; All are cut off with the extraneous pipeline that is connected of device to be cleaned, passage, then device to be cleaned and peripheral interim pipeline and blower fan power set are constituted airtight pipeloop system;
(2) upper reaches and the downstream position in the pipeloop system inserts condenser system and air current flow dynamical system;
(3) will be connected in the pipeloop system with the system of purging steam of flowmeter and switch through the steam clean pipeline system;
(4) the pipeloop system is fed steam and carry out heating and blowing, and carry out vapor recycle, promote that the raffinate steam raising in the device to be cleaned gets into gas phase through power set;
(5) reach 2～10kg/cm when the intrasystem steam pressure of pipeloop
2Or intrasystem phase concentrations opens condenser system and air current flow dynamical system and carries out the condensation cooling when no longer raising, when the pressure of system drops to 0～3kg/cm
2During the scope of gauge pressure, stop condensing unit and gas flow power set, with residual organic after the material returned of liquid form retracting device;
(6) repeating step (4), (5) are 2-8 time, and the residual organic more than the 95wt% is discharged from discharging tube with liquid form.
The intrasystem circulating current flow of described pipeloop is 2～50 times of apparatus system internal capacities to be cleaned/per hour.
The flow of described condenser system is 1～10 times of device internal capacity to be cleaned/per hour.
The gateway of described condenser system can be located at any position of the spare interface that comprises device to be cleaned in the pipeloop system.
This method adopts intensification and insulation a period of time observation phase concentrations to change the cycleoperation mode of lowering the temperature through condenser system when reaching peak value.
The startup of described condenser system and close and carry out chain with the temperature or the concentration of pipeloop system.
Described condenser system adopts one-level water quench or condensed in two stages, and the leading portion of described condensed in two stages adopts water quench, and back segment adopts the chilled water cooling.
Described condenser system connects for portable special equipment or through pipeline uses the available condenser in the field device system.
Compared with prior art; Usefulness of the present invention is: the structure through interim pipeline system has formed the pipeline that sealing and circulating purges, and compares with the open circuit purging system that adopts usually at present, has lowered the probability of pollutant emission to atmosphere on the one hand greatly; On the other hand under the condition that does not increase steam consumption; Through turbulent transmittance process, improve the transfer rate of heat and material, reduce and steam the tower time; Structure through the bypass condenser system can be realized being evaporated to the organic condensing and recycling of gas phase in the steam blowing process, being heated with the condensing plant of smaller specification, realizes the recovery to residual material after the device material returned with small device input and operating cost.
Description of drawings
Fig. 1 is the recovery process system sketch map based on the inventive method constituted.
Among the figure, 1 for cleaning device to be purged, 2 for import and export the pipeline blind flange, 3 for import and export pipeline valve, 4 be the interim pipeline import of closed circuit interface, 5 for the interim pipeline discharge coupling of closed circuit, 6 for interim pipeline, 7 for closed circuit blower fan dynamical system, 8 for bypass condenser system pipeline import interface, 9 for bypass condenser system pipeline discharge coupling, 10 for condenser system, 11 for condensation loop driven fan, 12 for organic matter reclaim liquid, 13 for the purging steam system, 14 for steam blowing line inlet, 15 for device self temperature sensor, 16 for device self pressure sensor, 17 for interim pipeline self temperature sensor, 18 for interim pipeline self pressure sensor, 19 for online VOCs detector, 20 for gas sampling mouth, 21 be that appliance arrangement reboiler, 22 is that device overhead condenser, 23 is the device product jar.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
The steam blowing of oil primary distillation tower reclaims
1) for (the about 3000m of internal volume of primary distillation tower system of certain petroleum refining
3) at first adopt valve or blind flange to carry out the partition with outside air charging and discharge pipe.
2) through the interim pipeline import of the closed circuit interface 4 of device top and bottom and the interim pipeline 6 and closed circuit blower fan dynamical system 7 (metered flow 15000m of the interim pipeline discharge coupling of closed circuit 5 places and periphery
3/ h) grade constitutes the sealing and circulating pipeline system.
3) insert condenser system 10 and condensation loop driven fan 11 at the bypass condenser system pipeline import interface 8 of the upstream and downstream of sealing and circulating pipeline system and bypass condenser system pipeline discharge coupling 9 places as air current flow dynamical system (metered flow 6000m
3/ h).
4) will be connected through steam blowing line inlet 14 with appliance arrangement with the purging steam system 13 of flow measurement and switch.
5) utilize device self temperature sensor 15 that distillation equipment itself has and install self pressure sensor 16 and control, set online VOCs detector 19 at pipeloop simultaneously.
6) after the interim whole installations of pipeline, closed closed-cycle system is fed 8kg/cm through steam blowing line inlet 14
2The steam of gauge pressure also passes through 7 circulations of closed circuit blower fan dynamical system with 15000m
3The gas flow of/h promotes the raffinate steam raising of waiting to purge in the cleaning device 1 to get into gas phase waiting to purge cleaning device 1 inner turbulent mass transfer, the heat transfer state of forming;
7) when waiting that purging cleaning device 1 specifies steam pressure or temperature (8kg/cm with the circulatory system arrival that interim pipeline 6 is formed
2And online detection data are opened the cooling media-cooling water and the condensation loop driven fan 11 of condenser system 10 pipelines, with 6000m when confirming that phase concentrations no longer raises gauge pressure),
3The bypass flow of/h is carried out condensation cooling, drops to 1kg/cm until the pressure of device self temperature sensor 15
2During the scope of gauge pressure, stop the supply of condensation refrigerant, stop condensation loop driven fan 11.So far accomplish and once fill Steam Heating vaporization, bypass condensing and recycling process.
8) repeating step 6; 7 carry out 3 new cyclings again, can the former oil residues more than 95% be discharged from condenser condenses liquid discharging tube with liquid form, thereby clean equipment on the one hand; One side is with the liquid form recovered material, thereby minimizing is to the discharging of atmosphere.
The steam blowing of toluene tank reclaims
1) for certain volume 500m
3The toluene tank system after accomplishing material returned work at first with charging and discharge pipe through valve-off or install blind flange additional and carry out the partition with outside air.
2) through the interim pipeline import of the closed circuit interface 4 of device top and bottom and the interim pipeline 6 and closed circuit blower fan dynamical system 7 (metered flow 3000m of the interim pipeline discharge coupling of closed circuit 5 places and periphery
3/ h) grade constitutes the sealing and circulating pipeline system.
3) insert condenser system 10 and condensation loop driven fan 11 at the bypass condenser system pipeline import interface 8 of the upstream and downstream of sealing and circulating pipeline system and bypass condenser system pipeline discharge coupling 9 places as air current flow dynamical system (flow 1000m
3/ h).
4) will be connected through steam blowing line inlet 14 with appliance arrangement with the purging steam system 13 of flow measurement and switch.
5) the circulating ventilation pipeline sets interim pipeline self temperature sensor 17 and interim pipeline self pressure sensor 18 carries out process control, sets online VOCs detector at the condenser inlet air-flow interface upper reaches of pipeloop simultaneously.
6) after the interim whole installations of pipeline, closed closed-cycle system is fed 2kg/cm through steam blowing line inlet 14
2The steam of gauge pressure also passes through 7 circulations of closed circuit blower fan dynamical system with 3000m
3The gas flow of/h promotes the raffinate steam raising of waiting to purge in the cleaning device 1 to get into gas phase waiting to purge cleaning device 1 inner turbulent mass transfer, the heat transfer state of forming.
7) when waiting that purging cleaning device 1 specifies steam pressure or temperature (2kg/cm with the circulatory system arrival that interim pipeline 6 is formed
2, gauge pressure) time, and online detection data are opened the cooling water and the condensation loop driven fan 1 of condenser system 10 pipelines, with 1000m when confirming that phase concentrations no longer raises
3The bypass flow of/h is carried out condensation cooling, drops to 0.02kg/cm until the pressure of interim pipeline self pressure sensor 18
2During the scope of gauge pressure, stop the supply of condensation refrigerant, stop blower fan 11.So far accomplish and once fill Steam Heating vaporization, bypass condensing and recycling process.
8) repeating step 6; 7 carry out 2 cyclings again, can the former storage tank residual toluene more than 90% be discharged from condenser condenses liquid discharging tube with liquid form, thereby clean equipment on the one hand; Be prone to the liquid form recovered material on the one hand, thereby reduce discharging to atmosphere.
Embodiment 3
Be used for certain chemical industry synthesizer emptying cleaning process atmosphere pollution and reduce discharging the method that reclaims; Its system architecture that adopts is as shown in Figure 1; Outside device 1 to be cleaned, set up pipeline and form the recyclegas loop; And the mode that adopts the integrated shunting condensation of vapor recycle heating and gasifying improves the efficient of steam blowing mass transfer, heat transfer and reduces the required load of condensing plant, thereby with residual organic after the material returned of liquid form retracting device.
This method specifically may further comprise the steps:
(1) utilizes import and export pipeline blind flange 2 and import and export pipeline valve 3 that all are cut off with the extraneous pipeline that is connected of device to be cleaned, passage, pass through the interim pipeline import of closed circuit interface 4 and the interim pipeline discharge coupling 5 of closed circuit then device 1 to be cleaned and peripheral interim pipeline 6 are constituted airtight pipeloop system with closed circuit blower fan dynamical system 7;
(2) insert condenser system 10 and condensation loop driven fan 11 at the upper reaches of pipeloop system and the bypass condenser system pipeline import interface 8 and bypass condenser system pipeline discharge coupling 9 places of downstream position;
(3) will be connected to the purging steam system 13 of flowmeter and switch in the pipeloop system through steam blowing line inlet 14;
(4) the pipeloop system is fed steam and carry out heating and blowing, and carry out vapor recycle, promote that the raffinate steam raising in the device to be cleaned gets into gas phase through power set;
(5) on device 1 to be cleaned, be equipped with device self temperature sensor 15, install self pressure sensor 16, appliance arrangement reboiler 21; Interim pipeline self temperature sensor 17, interim pipeline self pressure sensor 18, online VOCs detector 19, gas sampling mouth 20 are installed, when the intrasystem steam pressure of pipeloop reaches 2～10kg/cm on the interim pipeline 6
2Or intrasystem phase concentrations is when no longer raising, and the steam pressure of pipeloop system is 6kg/cm in the present embodiment
2, open condenser system 10 and condensation loop driven fan 11 and carry out the condensation cooling, when the pressure of system drops to 0～3kg/cm
2The scope of gauge pressure, system pressure is 1kg/cm in the present embodiment
2, stop condensing unit and gas flow power set, with organic recovery liquid 12 residual after the material returned of liquid form retracting device, product is collected in the device product jar 23 after device overhead condenser 22 condensations that device to be cleaned 1 top is provided with;
(6) repeating step (4), (5) are 2-8 time, adopt to heat up and the variation of insulation a period of time observation phase concentrations, through the cycleoperation mode of condenser system cooling, the residual organic more than the 95wt% are discharged from discharging tube with liquid form when reaching peak value.
In operating process; The intrasystem circulating current flow of pipeloop is 2～50 times of device 1 internal capacities to be cleaned/per hour; In the present embodiment be 10 times; The flow of condenser system 10 is that 1～10 times of device 1 internal capacity to be cleaned/per hour, present embodiment is 5 times, the startup of condenser system 10 and close and carry out chain with the temperature or the concentration of pipeloop system.Condenser system 10 adopts one-level water quench or condensed in two stages, adopts condensed in two stages in the present embodiment, and leading portion adopts water quench, and back segment adopts the chilled water cooling, and the condenser system 10 of use is portable special equipment.
Claims (9)
1. be used for chemical plant installations emptying cleaning process atmosphere pollution and reduce discharging the method that reclaims; It is characterized in that; This method is set up pipeline and is formed the recyclegas loop outside device to be cleaned; And the mode that adopts the integrated shunting condensation of vapor recycle heating and gasifying improves the efficient of steam blowing mass transfer, heat transfer and reduces the required load of condensing plant, thereby with residual organic after the material returned of liquid form retracting device.
2. the chemical plant installations emptying cleaning process atmosphere pollution that is used for according to claim 1 reduces discharging the method that reclaims, and it is characterized in that this method specifically may further comprise the steps:
(1) all is cut off with the extraneous pipeline that is connected of device to be cleaned, passage, then device to be cleaned and peripheral interim pipeline and blower fan power set are constituted airtight pipeloop system;
(2) upper reaches and the downstream position in the pipeloop system inserts condenser system and air current flow dynamical system;
(3) will be connected in the pipeloop system with the system of purging steam of flowmeter and switch through the steam clean pipeline system;
(4) the pipeloop system is fed steam and carry out heating and blowing, and carry out vapor recycle, promote that the raffinate steam raising in the device to be cleaned gets into gas phase through power set;
(5) reach 2～10kg/cm when the intrasystem steam pressure of pipeloop
2Or intrasystem phase concentrations opens condenser system and air current flow dynamical system and carries out the condensation cooling when no longer raising, when the pressure of system drops to 0～3kg/cm
2During the scope of gauge pressure, stop condensing unit and gas flow power set, with residual organic after the material returned of liquid form retracting device;
(6) repeating step (4), (5) are 2-8 time, and the residual organic more than the 95wt% is discharged from discharging tube with liquid form.
3. according to claim 2ly be used for the method that chemical plant installations emptying cleaning process atmosphere pollution reduce discharging to reclaim, it is characterized in that, the intrasystem circulating current flow of described pipeloop is 2～50 times of device internal capacities to be cleaned/per hour.
4. according to claim 2ly be used for the method that chemical plant installations emptying cleaning process atmosphere pollution reduce discharging to reclaim, it is characterized in that, the flow of described condenser system is 1～10 times of device internal capacity to be cleaned/per hour.
5. the chemical plant installations emptying cleaning process atmosphere pollution that is used for according to claim 2 reduces discharging the method that reclaims, and it is characterized in that the gateway of described condenser system can be located at any position of the spare interface that comprises device to be cleaned in the pipeloop system.
6. the chemical plant installations emptying cleaning process atmosphere pollution that is used for according to claim 2 reduces discharging the method that reclaims; It is characterized in that; This method adopts intensification and insulation a period of time observation phase concentrations to change the cycleoperation mode of lowering the temperature through condenser system when reaching peak value.
7. according to claim 2ly be used for the method that chemical plant installations emptying cleaning process atmosphere pollution reduce discharging to reclaim, it is characterized in that, the startup of described condenser system and close and carry out chain with the temperature or the concentration of pipeloop system.
8. the chemical plant installations emptying cleaning process atmosphere pollution that is used for according to claim 2 reduces discharging the method that reclaims; It is characterized in that; Described condenser system adopts one-level water quench or condensed in two stages, and the leading portion of described condensed in two stages adopts water quench, and back segment adopts the chilled water cooling.
9. the chemical plant installations emptying cleaning process atmosphere pollution that is used for according to claim 2 reduces discharging the method that reclaims, and it is characterized in that, described condenser system connects for portable special equipment or through pipeline uses condenser available in the field device system.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104568716A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Clean-type corrosion monitoring coupon device and clean-type corrosion monitoring method |
| CN108299143A (en) * | 2017-12-27 | 2018-07-20 | 北方华锦化学工业股份有限公司 | Ethylbenzene vapor phase alkylation device opens, stop during recovered material method |
| CN108502956A (en) * | 2018-05-29 | 2018-09-07 | 洛阳理工学院 | A kind of raffinate clean and reuse equipment |
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| CN101121079A (en) * | 2006-05-23 | 2008-02-13 | 权五硕 | Volatile organic compounds recovery apparatus and volatile organic compounds discharge/recovery system |
| CN101591844A (en) * | 2009-06-24 | 2009-12-02 | 中国人民解放军总后勤部军需装备研究所 | A kind of liquid-ammonium treating apparatus and using method thereof |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050288512A1 (en) * | 2004-01-27 | 2005-12-29 | Purifics Environmental Technologies, Inc. | Advanced contaminate treatment system |
| CN101121079A (en) * | 2006-05-23 | 2008-02-13 | 权五硕 | Volatile organic compounds recovery apparatus and volatile organic compounds discharge/recovery system |
| CN101591844A (en) * | 2009-06-24 | 2009-12-02 | 中国人民解放军总后勤部军需装备研究所 | A kind of liquid-ammonium treating apparatus and using method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568716A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Clean-type corrosion monitoring coupon device and clean-type corrosion monitoring method |
| CN104568716B (en) * | 2013-10-29 | 2017-12-01 | 中国石油天然气股份有限公司 | A kind of cleaning type corrosion monitoring piece suspension device and method |
| CN108299143A (en) * | 2017-12-27 | 2018-07-20 | 北方华锦化学工业股份有限公司 | Ethylbenzene vapor phase alkylation device opens, stop during recovered material method |
| CN108502956A (en) * | 2018-05-29 | 2018-09-07 | 洛阳理工学院 | A kind of raffinate clean and reuse equipment |
| CN108502956B (en) * | 2018-05-29 | 2024-01-19 | 洛阳理工学院 | Residual liquid cleaning and recycling equipment |
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| CN102698458B (en) | 2014-08-13 |
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