CN105999756A - Movable petrochemical enterprise shutdown gas-sweeping processing device and process - Google Patents
Movable petrochemical enterprise shutdown gas-sweeping processing device and process Download PDFInfo
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- CN105999756A CN105999756A CN201610539191.8A CN201610539191A CN105999756A CN 105999756 A CN105999756 A CN 105999756A CN 201610539191 A CN201610539191 A CN 201610539191A CN 105999756 A CN105999756 A CN 105999756A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a movable petrochemical enterprise shutdown gas-sweeping processing device and process. The device comprises a movable bearing foundation support, the movable bearing foundation support is provided with a gas-liquid separator, a sulfur-containing gas absorption tower, an organic gas oxidation and absorption tower and a deep purification tower; a gas outlet is connected with a first gas inlet through a pipe, a first gas outlet is connected with a second gas inlet through a pipe, a second air outlet is connected with a third gas inlet through a pipe, and a third gas outlet is connected with a fan through a pipe. The movable petrochemical enterprise shutdown gas-sweeping processing device and process have the advantages that a movable absorption device is adopted, configuration of pipes among devices is reduced, shutdown steam-sweeping consumption is lowered, safety in startup and shutdown processes is improved, and meanwhile targeting characteristic that pollutants are discharged in the petrochemical enterprise shutdown overhaul process, a processing method combining condensation, absorption and adsorption is adopted to conduct complete treatment on pollutants discharged in the petrochemical enterprise shutdown overhaul process.
Description
Technical field
The present invention relates to environmental protection technical field, particularly relate to a kind of packaged type petroleum chemical enterprise shut-down purge gas processing means and process technique.
Background technology
For carrying out " prevention and control of air pollution action plan ", carry forward vigorously petrochemical industry volatile organic matter (VOCs) pollution control, strengthen damage Environmental capacity.National environmental protection portion has issued " petrochemical industry volatile organic matter comprehensive improvement scheme ", carries out the comprehensive improvement of petrochemical industry VOCs comprehensively, and petrochemical industry VOCs discharge is greatly decreased, and promotes that ambient air quality is improved.Scheme explicitly point out formulate start-stop car, checking maintenance, etc. damage dye control.
Petroleum chemical enterprise, process units two or shut-down (breakdown) mainteance in 3 years are once, or device goes wrong, need partial devices is carried out shutdown process, before process units shut-down (breakdown) mainteance, need device, pipeline carries out steam, nitrogen or air purging, purge steam, nitrogen or air carry a large amount of polluter secretly, the pollutant coverage come out is wide, impact is big, not only pollute environment but also directly affect the healthy of people, there is also potential safety hazard simultaneously, by to along with production capacity expansion in recent years and crude oil in poor quality, sour crude oil ratio increases, each device progressively tends to overhauling by stages and in groups, purging frequency of stopping work can increase further.Purge gas mainly composition is steam, nitrogen or air, accounts for 99%, and pollutant are mainly hydrocarbon gas, sulfurous gas and contain amine gas etc..
At present, each enterprise, according to own characteristic, arranges one or more sets shut-down purge gas processing meanss at on-site.nullSuch as patent CN201020106455.9，Authorized announcement date 2010.11.17，It discloses a kind of chemical deodorization package unit for oil-refining shutdown purge gas,Including knot screen、Condensing unit、Gas-liquid separation device、Water-cooling apparatus、Chemical solvent wash mill、Aiutage，Knot screen is provided with the air intake of a purge gas，And this knot screen is by pipeline and condensing unit airtight connection，Condensing unit is connected by pipeline closed with gas-liquid separation device，Gas-liquid separation device is by the bottom airtight connection of pipeline with water-cooling apparatus，The top of water-cooling apparatus is connected by pipeline closed with chemical solvent wash mill，Aiutage is connected by pipeline closed with the gas outlet of chemical solvent wash mill，The bottom of water-cooling apparatus and the bottom of gas-liquid separation device have pipeline and the external world to be connected to discharge waste liquid respectively;Large petrochemical plant typically has tens covering devices, and all by dedicated pipeline, every covering device is caused emission-control equipment.Therefore, existing shut-down purge gas processing means is to use to focus on pipeline configuration complexity in the subject matter that use process exists, and steam consumption is big, inconvenient operation, there is potential safety hazard, meanwhile, existing process technique can not meet new emission request.
Summary of the invention
It is an object of the invention to provide a kind of packaged type petroleum chemical enterprise shut-down purge gas processing means and process technique, use packaged type dress absorption plant, reducing pipeline configuration between device, reduce the consumption purged steam of stopping work, while the safety of docking process is opened in raising, the feature discharged pollutants for petroleum chemical enterprise's shut-down (breakdown) mainteance, petroleum chemical enterprise's shut-down (breakdown) mainteance is discharged pollutants and administers comprehensively by the administering method using condensation, absorption and sorption to combine.
For realizing above-mentioned technical purpose, the technical scheme is that and be achieved in that:
A kind of packaged type petroleum chemical enterprise shut-down purge gas processing means, including moveable bearing base, moveable bearing base is provided with gas-liquid separator, sulfurous gas absorption tower, organic gas oxidative absorption tower and deep purifying tower；The bottom of described gas-liquid separator is provided with shut-down purge gas entrance, coolant outlet and condensate outlet, and gas-liquid separator top is provided with cooling water inlet and gas outlet；Bottom, described sulfurous gas absorption tower is provided with gas access one and circulation fluid entrance one, top, sulfurous gas absorption tower is provided with gas outlet one and circulation fluid entrance two, described organic gas oxidative absorption tower bottom is provided with gas access two and circulation fluid entrance three, organic gas oxidative absorption tower top is provided with gas outlet two and circulation fluid entrance four, described gas outlet is connected with gas access one by pipeline, described gas outlet one is by pipeline and gas access two, described gas outlet two-way piping is connected with gas access three, described gas outlet threeway piping connects blower fan, connect between described circulation fluid entrance two and circulation fluid entrance one and have acid absorbing liquid circulating pump, machine gas oxidation absorption pump it is connected with between described circulation fluid entrance four and circulation fluid entrance three.
Further, described gas-liquid separator is provided with liquidometer.
Further, described sulfurous gas absorption tower is gas-liquid counter current with organic gas oxidative absorption tower and contacts packed tower.
Further, if being provided with dried layer dismountable drawer type adsorption layer in described deep purifying tower.
Further, the gateway pipeline of described acid absorbing liquid circulating pump is respectively arranged with useless absorbing liquid floss hole one and fresh absorbing liquid suction inlet one.
Further, the gateway pipeline of described organic gas oxidative absorption pump is respectively arranged with useless absorbing liquid floss hole two and fresh absorbing liquid suction inlet two.
Further, described acid absorbing liquid circulating pump, organic gas oxidative absorption pump and blower fan are separately mounted on the bracing frame of bearing base.
A kind of technique utilizing packaged type petroleum chemical enterprise shut-down purge gas processing means to process shut-down purge gas, comprises the following steps:
S1. suitable flexible pipe is selected to be connected by the shut-down purge gas entrance of shut-down (breakdown) mainteance device pipeline and gas-liquid separator bottom；
S2. shut-down purge gas enters gas-liquid separator, and condensed water condensate outlet bottom gas-liquid separator is discharged, and has abnormal flavour or the effluvium gas outlet through gas-liquid separator top to enter sulfurous gas absorption tower；
S3. sulfurous gas absorption tower carries out desulfurization process to shut-down purge gas, and shut-down after treatment purges air through gas outlet one and enters organic gas oxidative absorption tower；
S4. organic gas oxidative absorption to the removing of the organic sulfur such as mercaptan, thioether and is oxidized to small organic molecule larger molecular organics while absorbing organic gas and amine, and shut-down after treatment purges air through gas outlet two and enters deep purifying tower；
S5. deep purifying tower carries out deep purifying to shut-down purge gas, and the most treated shut-down purges air through blower fan discharge.
Wherein, shut-down purge gas includes hydrocarbon gas, sulfurous gas and contains amine gas.
Beneficial effects of the present invention:
1, high treating effect, dusty gas reaches discharging standards after processing, alleviates environmental pollution, is suitable for the improvement of the complicated pollutant of petroleum chemical enterprise's discharge,.
2, Resource recovery, easy to operate, can individually reclaim the gas hydro carbons that every covering device purge produces, it is achieved the recycling of resource；
3, energy-conservation, safety is high, every covering device individual processing, reduce purge steam, nitrogen or the consumption of air, it is to avoid collaborating between pipeline, improve the safety of maintenance.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of packaged type petroleum chemical enterprise shut-down purge gas processing means described according to embodiments of the present invention；
Fig. 2 is the site plan of packaged type petroleum chemical enterprise shut-down purge gas processing means described according to embodiments of the present invention.
In figure:
1, gas-liquid separator；2, shut-down purge gas entrance；3, coolant outlet；4, cooling water inlet；5, gas outlet；6, condensate outlet；7, liquidometer；8, sulfurous gas absorption tower；9, organic gas oxidative absorption tower；10, deep purifying tower；11, gas access one；12, gas outlet one；13, circulation fluid entrance one；14, circulation fluid entrance two；15, gas access two；16, gas outlet two；17, circulation fluid entrance three；18, circulation fluid entrance four；19, gas access three；20, gas outlet three；21, acid absorbing liquid circulating pump；22, organic gas oxidative absorption pump；23, blower fan；24, drawer type adsorption layer；25, useless absorbing liquid floss hole one；26, fresh absorbing liquid suction inlet one；27, useless absorbing liquid floss hole two；28, fresh absorbing liquid suction inlet two；29, bearing base.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art are obtained, broadly fall into the scope of protection of the invention.
As shown in Figure 1-2, a kind of packaged type petroleum chemical enterprise shut-down purge gas processing means described according to embodiments of the present invention, including moveable bearing base 29, moveable bearing base 29 is provided with gas-liquid separator 1, sulfurous gas absorption tower 8, organic gas oxidative absorption tower 9 and deep purifying tower 10；The bottom of described gas-liquid separator 1 is provided with shut-down purge gas entrance 2, coolant outlet 3 and condensate outlet 6, and gas-liquid separator 1 top is provided with cooling water inlet 4 and gas outlet 5；nullBottom, described sulfurous gas absorption tower 8 is provided with gas access 1 and circulation fluid entrance 1，Top, sulfurous gas absorption tower 8 is provided with gas outlet 1 and circulation fluid entrance 2 14，It is provided with gas access 2 15 and circulation fluid entrance 3 17 bottom described organic gas oxidative absorption tower 9，Organic gas oxidative absorption tower 9 top is provided with gas outlet 2 16 and circulation fluid entrance 4 18，Described gas outlet 5 is connected with gas access 1 by pipeline，Described gas outlet 1 is by pipeline and gas access 2 15，Described gas outlet 2 16 is connected with gas access 3 19 by pipeline，Described gas outlet 3 20 is connected by pipeline blower fan 23，Connect between described circulation fluid entrance 2 14 and circulation fluid entrance 1 and have acid absorbing liquid circulating pump 21，Machine gas oxidation absorption pump 22 it is connected with between described circulation fluid entrance 4 18 and circulation fluid entrance 3 17.
In one particular embodiment of the present invention, described gas-liquid separator 1 is provided with liquidometer 7.
In one particular embodiment of the present invention, described sulfurous gas absorption tower 8 is gas-liquid counter current with organic gas oxidative absorption tower 9 and contacts packed tower.
In one particular embodiment of the present invention, if being provided with dried layer dismountable drawer type adsorption layer 24 in described deep purifying tower 10.
In one particular embodiment of the present invention, the gateway pipeline of described acid absorbing liquid circulating pump 21 is respectively arranged with useless absorbing liquid floss hole 1 and fresh absorbing liquid suction inlet 1.
In one particular embodiment of the present invention, the gateway pipeline of described organic gas oxidative absorption pump 22 is respectively arranged with useless absorbing liquid floss hole 2 27 and fresh absorbing liquid suction inlet 2 28.
In one particular embodiment of the present invention, described acid absorbing liquid circulating pump 21, organic gas oxidative absorption pump 22 and blower fan 23 are separately mounted on the bracing frame of bearing base 29.
The present invention also provides for a kind of packaged type petroleum chemical enterprise shut-down purge gas and processes technique, and described shut-down purge gas includes hydrocarbon gas, sulfurous gas and contains amine gas.
Purge steam, nitrogen or air are carried a large amount of polluter secretly and are entered gas-liquid separator, during as used steam blowing, the cooling of supercooled water can be led in gas-liquid separator, purge gas temperature is reduced, the middle hydro carbons that simultaneously purges steam condenses out, and improves the assimilation effect of subsequent cell；During if using nitrogen or air purging, directly hydrocarbon can be separated by gas-liquid separator, the hydro carbons condensed out can be after centralized collection, can be as the raw material of process units after device driving；Sulfurous gas absorption tower uses gas-liquid counter current to contact packed tower with organic gas oxidative absorption tower, liquid storing section is had in the bottom of tower, the floor space of device can be reduced, it is respectively equipped with useless absorbing liquid floss hole and fresh absorbing liquid suction inlet on the gateway pipeline of pump (including acid absorbing liquid circulating pump and organic gas oxidative absorption pump), it is easy to discharge useless absorbing liquid in time according to treatment effect in application process and supplement fresh absorbing liquid, it is ensured that running continuously and efficient treatment effect of device；Absorbing liquid used by sulfurous gas absorption tower is alkaline absorption solution, in order to ensure the removal effect to the organic sulfur such as mercaptan, thioether, with the addition of the oxidant used under acid condition, organic gas oxidative absorption tower uses neutrallty condition lower surface active absorption liquid, while absorbing organic gas and amine, larger molecular organics is oxidized to small organic molecule, beneficially the biodegradation of absorbing liquid；Deep purifying tower is made up of three layers of dismountable drawer type adsorption layer, can change in time according to exit gas change in the process of use, and the adsorbent of replacing can process by centralized recovery.
nullConcrete，Catalytic cracking unit shut-down (breakdown) mainteance，When needing with steam blowing equipment pipeline，Select suitable flexible pipe by the shut-down purge gas entrance 2 of device pipeline and gas-liquid separator 1 bottom，Shut-down purge gas enters gas-liquid separator 1，And discharge at gas-liquid separator 1 bottom condensate water，Gas-liquid separator 1 top abnormal flavour or effluvium enter sulfurous gas absorption tower 8，Absorbing liquid used by sulfurous gas absorption tower 8 is alkaline absorption solution，In order to ensure mercaptan、The removal effect of the organic sulfurs such as thioether，With the addition of the oxidant used under acid condition，Shut-down purge gas after treatment subsequently enters organic gas oxidative absorption tower 9，Organic gas oxidative absorption 9 uses neutrallty condition lower surface active absorption liquid，While absorbing organic gas and amine，Larger molecular organics is oxidized to small organic molecule，Be conducive to the biodegradation of absorbing liquid；Next shut-down purge gas enters deep purifying tower 10, deep purifying tower 10 is made up of three layers of dismountable drawer type adsorption layer, can change in time according to exit gas change in the process of use, the adsorbent changed can process by centralized recovery, the most treated shut-down purges air through blower fan 23 and discharges, stopping work in purging 24 hours, outlet hydrogen sulfide, ammonia and NMHC respectively reach " petroleum refining industry pollutant emission standard " (GB31570-2015) and " emission standard for odor pollutants " (GB14554-93) requirement.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (9)
1. a packaged type petroleum chemical enterprise shut-down purge gas processing means, including moveable bearing base (29), it is characterised in that: it is provided with gas-liquid separator (1), sulfurous gas absorption tower (8), organic gas oxidative absorption tower (9) and deep purifying tower (10) on described bearing base (29)；The bottom of described gas-liquid separator (1) is provided with shut-down purge gas entrance (2), coolant outlet (3) and condensate outlet (6), and gas-liquid separator (1) top is provided with cooling water inlet (4) and gas outlet (5)；nullDescribed sulfurous gas absorption tower (8) bottom is provided with gas access one (11) and circulation fluid entrance one (13)，Sulfurous gas absorption tower (8) top is provided with gas outlet one (12) and circulation fluid entrance two (14)，Described organic gas oxidative absorption tower (9) bottom is provided with gas access two (15) and circulation fluid entrance three (17)，Organic gas oxidative absorption tower (9) top is provided with gas outlet two (16) and circulation fluid entrance four (18)，Described gas outlet (5) is connected with gas access one (11) by pipeline，Described gas outlet one (12) is by pipeline and gas access two (15)，Described gas outlet two (16) is connected with gas access three (19) by pipeline，Described gas outlet three (20) is connected by pipeline blower fan (23)，Connect between described circulation fluid entrance two (14) and circulation fluid entrance one (13) and have acid absorbing liquid circulating pump (21)，Machine gas oxidation absorption pump (22) it is connected with between described circulation fluid entrance four (18) and circulation fluid entrance three (17).
Packaged type petroleum chemical enterprise the most according to claim 1 shut-down purge gas processing means, it is characterised in that: it is provided with liquidometer (7) on described gas-liquid separator (1).
The technique of process shut-down purge gas the most according to claim 1, it is characterised in that: described sulfurous gas absorption tower (8) is gas-liquid counter current with organic gas oxidative absorption tower (9) and contacts packed tower.
Packaged type petroleum chemical enterprise the most according to claim 1 shut-down purge gas processing means, it is characterised in that: described deep purifying tower (10) if in be provided with dried layer dismountable drawer type adsorption layer (24).
Packaged type petroleum chemical enterprise the most according to claim 1 shut-down purge gas processing means, it is characterised in that: it is respectively arranged with useless absorbing liquid floss hole one (25) and fresh absorbing liquid suction inlet one (26) on the gateway pipeline of described acid absorbing liquid circulating pump (21).
Packaged type petroleum chemical enterprise the most according to claim 1 shut-down purge gas processing means, it is characterised in that: it is respectively arranged with useless absorbing liquid floss hole two (27) and fresh absorbing liquid suction inlet two (28) on the gateway pipeline of described organic gas oxidative absorption pump (22).
Packaged type petroleum chemical enterprise the most according to claim 1 shut-down purge gas processing means, it is characterised in that: described acid absorbing liquid circulating pump (21), organic gas oxidative absorption pump (22) and blower fan (23) are separately mounted on the bracing frame of bearing base (29).
8. the technique that the processing means that a kind utilizes described in any one of claim 1-7 processes shut-down purge gas, it is characterised in that: comprise the following steps:
S1. suitable flexible pipe is selected shut-down purge gas entrance (2) of shut-down (breakdown) mainteance device pipeline and gas-liquid separator (1) bottom to be connected；
S2. shut-down purge gas enters gas-liquid separator (1), and the condensed water condensate outlet (6) from gas-liquid separator (1) bottom is discharged, and has abnormal flavour or the effluvium gas outlet (5) through gas-liquid separator (1) top to enter sulfurous gas absorption tower (8)；
S3. sulfurous gas absorption tower (8) carry out desulfurization process to shut-down purge gas, and shut-down after treatment purges air through gas outlet one (12) and enters organic gas oxidative absorption tower (9)；
S4. organic gas oxidative absorption (9) to the removing of the organic sulfur such as mercaptan, thioether and is oxidized to small organic molecule larger molecular organics while absorbing organic gas and amine, and shut-down after treatment purges air through gas outlet two (16) and enters deep purifying tower (10)；
S5. deep purifying tower (10) carries out deep purifying to shut-down purge gas, and the most treated shut-down purges air through blower fan (23) discharge.
The technique of process shut-down purge gas the most according to claim 8, it is characterised in that: shut-down purge gas includes hydrocarbon gas, sulfurous gas and contains amine gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610539191.8A CN105999756A (en) | 2016-07-08 | 2016-07-08 | Movable petrochemical enterprise shutdown gas-sweeping processing device and process |
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| CN201610539191.8A CN105999756A (en) | 2016-07-08 | 2016-07-08 | Movable petrochemical enterprise shutdown gas-sweeping processing device and process |
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