CN108380001A - A kind of tank area protection nitrogen recycling processing cycle utilizes system and method - Google Patents
A kind of tank area protection nitrogen recycling processing cycle utilizes system and method Download PDFInfo
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- CN108380001A CN108380001A CN201810439105.5A CN201810439105A CN108380001A CN 108380001 A CN108380001 A CN 108380001A CN 201810439105 A CN201810439105 A CN 201810439105A CN 108380001 A CN108380001 A CN 108380001A
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- nitrogen
- tank
- hydrocarbon
- tank area
- pipeline
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 341
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012545 processing Methods 0.000 title claims abstract description 18
- 238000004064 recycling Methods 0.000 title claims abstract description 14
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 61
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 57
- 238000001179 sorption measurement Methods 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 25
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 7
- 230000023556 desulfurization Effects 0.000 claims abstract description 7
- 239000013589 supplement Substances 0.000 claims abstract description 6
- 239000006096 absorbing agent Substances 0.000 claims description 42
- 230000001105 regulatory effect Effects 0.000 claims description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 34
- 229910052760 oxygen Inorganic materials 0.000 claims description 34
- 239000001301 oxygen Substances 0.000 claims description 34
- 238000003860 storage Methods 0.000 claims description 25
- 239000003463 adsorbent Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 230000003009 desulfurizing effect Effects 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 238000003795 desorption Methods 0.000 claims description 5
- 239000002808 molecular sieve Substances 0.000 claims description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 3
- 238000005202 decontamination Methods 0.000 claims description 3
- 230000003588 decontaminative effect Effects 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 4
- 235000011194 food seasoning agent Nutrition 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000011218 segmentation Effects 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 239000003208 petroleum Substances 0.000 description 11
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009841 combustion method Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 electronics Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D53/002—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 by condensation
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/0476—Vacuum pressure swing adsorption
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- 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
- B01D53/30—Controlling by gas-analysis apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/104—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a kind of tank area protection nitrogen recycling processing cycles to utilize system and method, dirty nitrogen component is discharged for tank area, the combination technique of hydrocarbon+pressure-variable adsorption deoxidation treatment is taken off using absorption process desulfurization+cooling seasoning dehydration+Vacuum Pressure Swing Adsorption, and segmentation injection protection nitrogen safety control technology, respectively obtain the industrial gaseous nitrogen of high concentration of hydrocarbon type organic and 99% (V%) purity, high concentration of hydrocarbon type organic can safe utilization, 99% (V%) purity nitrogen gas is utilized as tank area protection nitrogen circulation, tank area protection Nitrogen pipe network need to only supplement a small amount of purity nitrogen, tank area nitrogen protecting system may make to prove effective.The present invention can arrange that full-automatic chain control operation drastically reduces enterprise's Storage Tank nitrogen consumption and gas emptying amount, has significantly economic benefit and social benefit on the spot in tank field.
Description
Technical field
The present invention relates to the petroleum vapor recovery processing method generated during a kind of oil storage and transportation more particularly to a kind of storages
Nitrogen recycling processing cycle is protected to utilize system and method in tank field.
Background technology
Petroleum chemical industry Storage Tank takes up a large area, storage tank quantity is more, storage material variety is more, and storage tank quantity is most
Be normal pressure (micro- internal pressure) fixed tank, have the types such as interior floating plate tank, arch-roof tank, be the maximum atmosphere pollution inorganization of enterprise
The safety of emission source and enterprise-essential controls region, and for the theory of tank area intrinsic safety management, petroleum chemical enterprise is for energy
The atmospheric storage tank for enough implementing nitrogen protection implements nitrogen envelope, and gas-phase space oxygen concentration in atmospheric storage tank is maintained to be not more than 5%,
Explosion condition is eliminated, prevents storage tank explosion accident from occurring.From the point of view of petroleum chemical enterprise's Storage Tank field investigation, 100000m3Total tank
Hold protection nitrogen consumption up to 2000Nm3/ h, while there is also nitrogen envelope valve events frequently easily to damage, the take-off of breather valve is returned
The case where falling action not in time, leading to storage tank nitrogen containing VOCs (hereinafter referred to as dirty nitrogen) continued emissions, nitrogen consumption is protected to increase severely.
Petroleum chemical enterprise's storage tank is produced with protection nitrogen by air separation unit is unified at present, according to《Petrochemical enterprise nitrogen oxygen system design rule
Model》(SH/T3106) standard production nitrogen gas purity is not less than the purity nitrogen of 99.99% (V%), to meet process units requirement,
Purity nitrogen energy reduced value is 0.15kg standard oils/Nm3；And atmospheric storage tank protection nitrogen can be using pure not less than 99% (V%)
The industrial gaseous nitrogen of degree, existing technical combinations can meet low-cost processes tank discharge dirt nitrogen to produce storage tank protection
The requirement of nitrogen.
The dirty nitrogen component of all kinds of tank discharges in petroleum chemical enterprise Storage Tank contain hydro carbons, benzene homologues, sulfide, water vapour,
The oil vapor treatment technical method of air etc., use has condensation method, absorption process, absorption method, embrane method, combustion method and a variety of methods
Combination.Based on existing atmosphere pollutants emission standards are harshness and petroleum vapor recovery value and petroleum vapor recovery operating cost etc.
Factor considers, and the end treatment of the dirty nitrogen of petroleum chemical enterprise's Storage Tank discharge mostly uses combustion method (such as direct flame combustion
Burning method, flame combustion method, catalytic oxidation, regenerative oxidation method etc.) processing after qualified discharge so that Storage Tank protection nitrogen be
The nitrogen combustion processing of gas, owner's operating cost superelevation, while high concentration is disposably used easily to generate thermal NO dirty
Contaminate air.
Find to have using hydrogenation catalyst deoxygenation method-adsorption cleaning method in industries such as steel, electronics, chemical industry through retrieval or
Carbon carries the technology that catalytic deoxidation reaction method-adsorption cleaning method carries out dirty nitrogen purification process reuse；In industrial gasses technical aspect
There is pressure swing adsorption method purifying hydrogen of hydrogen, purification methane, purifying carbon dioxide, recycle the technologies such as oil gas, nitrogen processed, oxygen processed.At present not yet
It was found that there is the dirty nitrogen to being discharged in oil product storage system to use：Absorption process sulphur removal-freezing water removal-vacuum pressure swing adsorption process is de-
Hydrocarbon-pressure swing adsorption method deoxidation treatment is recycled for use as the integrated technology of storage tank protection nitrogen.
Invention content
Technical problem to be solved by the present invention lies in：The skill utilized again currently without the dirty nitrogen of processing Storage Tank discharge
Art provides a kind of tank area protection nitrogen recycling processing cycle and utilizes system and method.
The present invention is that solution above-mentioned technical problem, the present invention include compressor, cooler, take off by the following technical programs
Sulphur tower, cooling driers, de- hydrocarbon absorber, vacuum pump, deoxidation absorber, muffler, nitrogen gas tank and fine filter；The compressor enters
Mouth is connect with the dirty nitrogen discharged manifold in tank area, and the outlet of the compressor and the entrance of cooler connect, and the cooler goes out
Mouth is connected to the dirty nitrogen inlet of desulfurizing tower lower part, and the gas outlet on the desulfurizing tower top and the entrance of cooling driers connect, described
The outlet of cooling driers is connected to inlet manifold's entrance of de- hydrocarbon absorber, the outlets outlet manifold and deoxidation of the de- hydrocarbon absorber
Inlet manifold's entrance of absorber connects, and the outlets resolution gas manifold of the de- hydrocarbon absorber are connect with the entrance of vacuum pump, institute
The entrance of the outlet and muffler of stating the resolution gas manifold of deoxidation absorber connects, the outlet manifold connections of the deoxidation absorber
To the entrance of nitrogen gas tank, the outlet of the nitrogen gas tank is connected to the entrance of fine filter, and outlet and the tank area of the fine filter are protected
Protect nitrogen pipeline connection.
It is equipped with the first oxygen conten analyser successively between the pipeline of the suction port of compressor and the dirty nitrogen discharged manifold in tank area
With plant area's purity nitrogen pipeline, the first regulating valve, the output of first oxygen conten analyser are provided on plant area's purity nitrogen pipeline
Signal is connected in the first regulating valve.
The second oxygen conten analyser, institute are equipped between the outlet of the cooling driers and inlet manifold's entrance of de- hydrocarbon absorber
It states plant area's purity nitrogen pipeline to be connected on the inlet manifold of de- hydrocarbon absorber, the second adjusting is provided on plant area's purity nitrogen pipeline
The output signal of valve, second oxygen conten analyser is connected in the second regulating valve.
The outlet of the fine filter is equipped with third regulating valve and pressure transmitter successively on tank area protection nitrogen pipeline,
Plant area's purity nitrogen pipeline is connected on tank area protection nitrogen pipeline, and the 4th adjusting is provided on plant area's purity nitrogen pipeline
Valve, the pressure transmitter output signal are connected respectively to third regulating valve and the 4th regulating valve.
The de- hydrocarbon absorber includes at least two de- hydrocarbon adsorption towers being arranged in parallel, in the de- hydrocarbon adsorption tower from lower and
On be filled with silica gel, activated carbon take off hydrocarbon adsorbent.
The deoxidation absorber includes at least two deoxidation adsorption towers being arranged in parallel, and is filled in the deoxidation adsorption tower
Deoxidation adsorbent, the deoxidation adsorbent are carbon molecular sieve.
A kind of tank area protection nitrogen recycling processing cycle utilizes the application method of system, includes the following steps：
(1) purity nitrogen is supplemented into the nitrogen discharged manifold of dirt at suction port of compressor, the oxygen content controlled in dirty nitrogen is less than 5%
(V%)；
(2) desulfurization is carried out after dirty nitrogen being cooled to 45 DEG C or less；
(3) dirty nitrogen is cooled to 2~4 DEG C, except the moisture and C in decontamination nitrogen6The above hydrocarbon component；
(4) purity nitrogen is supplemented into the inlet manifold of de- hydrocarbon absorber, the oxygen content controlled in dirty nitrogen is less than 5% (V%)；
(5) the de- hydrocarbon adsorption tower carries out adsorbing-regenerating automatically switching operation, and vacuum pump is to regenerated de- hydrocarbon adsorption tower
The organic matter that desorption takes off hydrocarbon adsorbent kind is vacuumized, resolution gas recycles or carry out burning disposal；
(6) the deoxidation adsorption tower carries out adsorbing-regenerating automatically switching operation, and gas is put in regenerated deoxidation adsorption tower
Sky is to normal pressure；
(7) the nitrogen gas tank storage nitrogen pressure uses pressure, pressure transmitter output not less than tank area protection nitrogen
Signal controls third regulating valve and ensures that tank area protection nitrogen pipeline pressure reaches using pressure first, when nitrogen is protected in tank area
When pipeline pressure is not achieved using pressure, pressure transmitter output signal controls the 4th regulating valve and protects nitrogen pipeline to tank area
Supplement purity nitrogen reaches using pressure.
The present invention has the following advantages compared with prior art：The present invention is re-used as storage tank to handle the dirty nitrogen of Storage Tank discharge
For the purpose of protecting nitrogen circulation use, dirty nitrogen component is discharged for Storage Tank, uses ripe absorption process desulfurization, vacuum becomes
The technology that pressure absorption takes off hydrocarbon, pressure-variable adsorption deoxidation segment processing combines, respectively obtains high concentration of hydrocarbon type organic and 99% purity
Storage tank protect nitrogen；High concentration of hydrocarbon type organic not oxious components such as sulfur-bearing, oxygen can be used as quality raw materials and recycle safely,
99% (V%) purity nitrogen gas is utilized as tank area protection nitrogen circulation, and tank area protection Nitrogen pipe network need to only supplement a small amount of pure
Nitrogen, you can so that tank area nitrogen protecting system proves effective.Relative to existing oil vapor treatment technology, present invention substantially reduces processing
Gas emptying amount and purity nitrogen consumption afterwards, it will be apparent that reduce owner's integrated operation cost, there is significant social benefit.
Absorption process that the present invention uses, cooling seasoning, absorption method combination technique, and segmentation injection nitrogen safeguard protection
Automatic control technology effectively prevents the insecurity such as high temperature, explosion from occurring, relative to hydrogenation catalyst deoxygenation method-suction
The attached method of purification or carbon carry the technology that catalytic deoxidation reaction method-adsorption cleaning method carries out dirty nitrogen purification process reuse, and the present invention does not have
There are the consumption such as hydrogen, carbon, catalyst, also without high-temperature reaction process and the safety control system of complexity, the present invention has this
Matter safety greatly reduces and oil tank safe distance requirement.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
In figure：Arrow indicates medium flow direction；Heavy line indicates equipment and pipeline；Dotted line indicates instrument signal line.
Specific implementation mode
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
As shown in Figure 1, the present embodiment handles the dirty nitrogen of tank discharge, reaches storage tank protection nitrogen and use standard
(industrial gaseous nitrogen) is used for petroleum chemical enterprise Storage Tank, and 99.99% purity nitrogen of the unified production of enterprise's air separation unit is as storage
Tank field supplement nitrogen is transported to use.
The present embodiment includes compressor 1, cooler 2, desulfurizing tower 3, cooling driers 4, de- hydrocarbon absorber 5, vacuum pump 6, deoxidation
Absorber 7, muffler 8, nitrogen gas tank 9, fine filter 10；The dirty nitrogen discharged manifold in 1 entrance of the compressor and tank area 11 connect, pressure
The outlet of contracting machine 1 is connect with 2 entrance of cooler, and the outlet of cooler 2 is connect with 3 lower part dirt nitrogen entrance of desulfurizing tower, and 3 top of desulfurizing tower goes out
Gas port is connect with 4 entrance of cooling driers, and the outlet of cooling driers 4 is connect with the entrance of 5 lower part inlet manifold of de- hydrocarbon absorber, takes off hydrocarbon absorption
The outlet of 5 top outlet manifold of device is connect with the entrance of 7 lower part inlet manifold of deoxidation absorber, takes off the 5 lower part parsing of hydrocarbon absorber
The outlet of gas manifold is connect with 6 entrance of vacuum pump, and vacuum pump 6 exports preferential attachment plant area fuel gas pipe network 14；Deoxidation absorber 7
The outlet of lower part resolution gas manifold is connect with 8 entrance of muffler, outlet and the nitrogen gas tank 9 of 7 top outlet manifold of deoxidation absorber
Entrance connects, and 9 upper outlet of nitrogen gas tank is connect with 10 entrance of fine filter, and nitrogen pipeline 13 is protected in the outlet of fine filter 10 with tank area
Connection.
It is equipped with the first online oxygen analysis successively on the dirty nitrogen discharged manifold 11 to the pipeline of 1 entrance of compressor in tank area
Instrument 21 and plant area's purity nitrogen pipeline 12 are equipped with the first regulating valve 22, the first oxygen analysis on plant area's purity nitrogen pipeline 12
21 output signal of instrument connects the first regulating valve 22.
Cooling driers 4 are exported on the pipeline of 5 lower part inlet manifold's entrance connection of de- hydrocarbon absorber and are equipped with online second successively
Oxygen conten analyser 23 and plant area's purity nitrogen pipeline 12, are equipped with the second regulating valve 24 on plant area's purity nitrogen pipeline 12, and second
23 output signal of oxygen conten analyser connects the second regulating valve 24.
Fine filter 10 is exported in tank area protection nitrogen connecting pipe and is equipped with third regulating valve 26, plant area's purity nitrogen pipe successively
Road 12, pressure transmitter 25, the 4th regulating valve 27 is equipped on plant area's purity nitrogen pipeline 12, and the pressure transmitter 25 exports
Signal connects third regulating valve 26 and the 4th regulating valve 27.
The specific work process of the present embodiment is as follows：
The dirty nitrogen of Storage Tank discharge is sent through the dirty nitrogen discharged closed collections of manifold 11 in tank area to 1 entrance of compressor,
First oxygen conten analyser 21 is set on the dirty nitrogen discharged manifold in tank area 11, the oxygen content in on-line checking dirt nitrogen works as oxygen content
When more than 5% (V%), the control of 21 output signal of the first oxygen conten analyser is mounted on the first adjusting on plant area's purity nitrogen pipeline 12
Valve 22 is opened, and supplements 99.99% (V%) purity nitrogen into dirty nitrogen discharged manifold, when oxygen content reaches 5% (V%), the first oxygen contains
It measures 21 output signal of analyzer and controls the closing of the first regulating valve 22, eliminate Storage Tank discharge gas burning condition, ensure follow-up
Dirty nitrogen treatment facility safe operation.
Dirty nitrogen boosts to setting pressure 0.5MPa into cooler 2 through compressor 1, has recirculated cooling water tube bank in cooler 2,
Cooler 2 enters 3 lower part of desulfurizing tower after the high temperature dirt nitrogen that compressor 1 generates is cooled to 45 DEG C or less；Desulfurizing tower 3 is preferred
Packed tower, the desulfurization agent mass transfer that dirty nitrogen comes with 3 top of desulfurizing tower from bottom to top remove the sulfide in dirty nitrogen, after desulfurization
Dirty nitrogen sent from the top of desulfurizing tower 3 to cooling driers 4.Cooling driers 4 are complete set of equipments, by refrigerant circulation compressor, evaporator, vapour-liquid
The compositions such as separator, dirty nitrogen are cooled to 2~4 DEG C through cooling driers 4, except the moisture and C in decontamination nitrogen6The above hydrocarbon component so that
Dirty nitrogen into de- hydrocarbon absorber 5 is in stable condition, while low temperature dirt nitrogen is conducive to improve the adsorption rate for taking off hydrocarbon adsorbent and suction
Attached amount.Cooling driers 4 are exported to de- 5 pipeline of hydrocarbon absorber and are equipped with the second oxygen conten analyser 23, when oxygen content is more than 5%
(V%) when, 23 output signal of the second oxygen conten analyser control be mounted on plant area's purity nitrogen pipeline 12 on the second regulating valve 24 to
99.99% (V%) purity nitrogen, when oxygen content reaches 5% (V%), 23 output signal of the second oxygen conten analyser are supplemented in pipeline
The closing of the second regulating valve 24 is controlled, is used to eliminate the gas oxygen content lift-rising caused by desulfurization, cooling drying process, and follow-up
The oxygen-containing explosive gas explosion ratio range that absorption process heating is brought expands insecurity.
De- hydrocarbon absorber 5 takes off hydrocarbon adsorption tower, valve, automatic control system etc. by least two parallel connections and constitutes, and takes off hydrocarbon absorption
Cone pulley stream adsorb-automatically switching operation is regenerated, it is filled with the de- hydrocarbon such as silica gel, activated carbon from bottom to top in de- hydrocarbon adsorption tower
Adsorbent, de- hydrocarbon adsorbent selective absorption dirt nitrogen include the organic matters such as hydro carbons, benzene homologues including methane, nitrogen with
Oxygen can be by taking off hydrocarbon adsorbent layer；Adsorption process can discharge heat, when the absorption of de- hydrocarbon adsorbent reaches certain saturation degree
When, terminate adsorption operations and automatically switch to vacuum desorption regenerative operation, vacuum pump 6 is evacuated down to regenerated de- hydrocarbon absorber 5
Absolute atmosphere 10kPa is hereinafter, the organic constituents such as hydro carbons in de- hydrocarbon adsorbent are desorbed desorption and come out, resolution gas not sulfur-bearing
The organic matter of compound and composition of air is the fuel of good industrial chemicals and safely cleaning, and the present embodiment is preferably by vacuum pump 6
The resolution gas of discharge boosts to 0.2MPa, send and recycles to oil refining process units or used as fuel gas, it is difficult to recycling profit
Used time is discharged into flare system 15 and carries out burning disposal qualified discharge.Vacuum Pressure Swing Adsorption isolation technics is widely used in petrochemical industry
Industry, such as coal bed gas methane pressure-variable adsorption deoxy technology etc..
The gas component for taking off hydrocarbon adsorbent layer across de- hydrocarbon absorber 5 is mainly nitrogen and oxygen, and entering deoxidation by pipeline inhales
Adnexa 7, deoxidation absorber 7 are made of at least two parallel connection deoxidation adsorption towers, valve, automatic control systems etc., deoxidation adsorption tower
It carries out adsorbing-regenerating handover operation in turn, is filled with adsorbent in deoxidation adsorption tower, the preferred carbon molecular sieve of adsorbent, oxygen,
Carbon dioxide and micro-moisture are adsorbed by carbon molecular sieve, and nitrogen is by carbon molecular sieve adsorbent layer at the top of deoxidation absorber 7
Outflow.When adsorbent absorption reaches certain saturation degree, terminates adsorption operations and automatically switch to desorption and regeneration operation, i.e., it will again
Raw deoxidation adsorption column pressure is rapidly decreased to normal pressure, and oxygen, carbon dioxide and micro-moisture that carbon molecules are adsorbed is made to release,
Pass through 8 safety vent of muffler.Making nitrogen by pressure swing adsorption technology is widely used, and the industrial gaseous nitrogen purity of production is generally not less than
98.5% (V%), the preferred storage tank protection nitrogen gas purity 99% (V%) of the present embodiment.
The nitrogen that 7 top of deoxidation absorber is flowed out is stored into nitrogen gas tank 9 and is used as protection nitrogen for tank area, nitrogen
9 storage temperature of tank is room temperature, pressure is not less than 0.3MPa, and 9 upper outlet of nitrogen gas tank is connect with 10 entrance of fine filter, fine filter 10
For filtering 0.01 μm or more particle, the outlet of fine filter 10 is connect with tank area protection nitrogen pipeline 13, and nitrogen is protected in tank area
Pipeline 13 is equipped with third regulating valve 26, plant area's purity nitrogen pipeline 12, pressure transmitter 25, and the is equipped on plant area's purity nitrogen pipeline 12
Four regulating valves 27,25 output signal of pressure transmitter connect third regulating valve 26 and the 4th regulating valve 27, and pressure transmitter 25 is controlled
Third regulating valve 26 processed, which is opened, maintains tank area protection 13 pressure of nitrogen pipeline in 0.3MPa, when protection nitrogen pipeline pressure is less than
Pressure transmitter 25 controls the 4th regulating valve 27 and opens when 0.25MPa, and the 99.99% of 0.6MPa is supplemented to protection nitrogen pipeline
(V%) purity nitrogen stablizes tank area protection 13 pressure of nitrogen pipeline and closes the 4th regulating valve 27 after 0.3MPa.
Petroleum chemical enterprise Storage Tank using nitrogen protection tank discharge dirty nitrogen complicated components, containing nitrogen-rich gas with
And the air unavoidably entered, also contain hydro carbons, benzene homologues, sulfide, the water vapour etc. of storage material volatilization.This system according to
According to " storage tank nitrogen protection technical standard ", can produce reach meet storage tank protection nitrogen gas purity not less than 99% (V%), nitrogen
Manifold pressure is not less than the requirement of 0.3M Pa, it is ensured that storage tank safety, storage quality of material are ensured.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (7)
1. a kind of tank area protection nitrogen recycling processing cycle utilizes system, which is characterized in that including compressor, cooler, take off
Sulphur tower, cooling driers, de- hydrocarbon absorber, vacuum pump, deoxidation absorber, muffler, nitrogen gas tank and fine filter；The compressor enters
Mouth is connect with the dirty nitrogen discharged manifold in tank area, and the outlet of the compressor and the entrance of cooler connect, and the cooler goes out
Mouth is connected to the dirty nitrogen inlet of desulfurizing tower lower part, and the gas outlet on the desulfurizing tower top and the entrance of cooling driers connect, described
The outlet of cooling driers is connected to inlet manifold's entrance of de- hydrocarbon absorber, the outlets outlet manifold and deoxidation of the de- hydrocarbon absorber
Inlet manifold's entrance of absorber connects, and the outlets resolution gas manifold of the de- hydrocarbon absorber are connect with the entrance of vacuum pump, institute
The entrance of the outlet and muffler of stating the resolution gas manifold of deoxidation absorber connects, the outlet manifold connections of the deoxidation absorber
To the entrance of nitrogen gas tank, the outlet of the nitrogen gas tank is connected to the entrance of fine filter, and outlet and the tank area of the fine filter are protected
Protect nitrogen pipeline connection.
2. a kind of tank area protection nitrogen recycling processing cycle according to claim 1 utilizes system, which is characterized in that institute
It states and is equipped with the first oxygen conten analyser and plant area's purity nitrogen successively between the pipeline of suction port of compressor and the dirty nitrogen discharged manifold in tank area
Pipeline is provided with the first regulating valve on plant area's purity nitrogen pipeline, and the output signal of first oxygen conten analyser is connected to
In first regulating valve.
3. a kind of tank area protection nitrogen recycling processing cycle according to claim 1 utilizes system, which is characterized in that institute
It states and is equipped with the second oxygen conten analyser, plant area's purity nitrogen between the outlet of cooling driers and inlet manifold's entrance of de- hydrocarbon absorber
Pipeline is connected on the inlet manifold of de- hydrocarbon absorber, is provided with the second regulating valve on plant area's purity nitrogen pipeline, and described second
The output signal of oxygen conten analyser is connected in the second regulating valve.
4. a kind of tank area protection nitrogen recycling processing cycle according to claim 1 utilizes system, which is characterized in that institute
The outlet for stating fine filter is equipped with third regulating valve and pressure transmitter successively on tank area protection nitrogen pipeline, and the plant area is pure
Nitrogen pipeline is connected on tank area protection nitrogen pipeline, and the 4th regulating valve, the pressure are provided on plant area's purity nitrogen pipeline
Transmitter output signal is connected respectively to third regulating valve and the 4th regulating valve.
5. a kind of tank area protection nitrogen recycling processing cycle according to claim 1 utilizes system, which is characterized in that institute
It includes at least two de- hydrocarbon adsorption towers being arranged in parallel to state de- hydrocarbon absorber, and silicon is filled with from bottom to top in the de- hydrocarbon adsorption tower
Glue, activated carbon take off hydrocarbon adsorbent.
6. a kind of tank area protection nitrogen recycling processing cycle according to claim 1 utilizes system, which is characterized in that institute
It includes at least two deoxidation adsorption towers being arranged in parallel to state deoxidation absorber, and deoxidation absorption is filled in the deoxidation adsorption tower
Agent, the deoxidation adsorbent are carbon molecular sieve.
7. a kind of use utilizing system such as claim 1~6 any one of them tank area protection nitrogen recycling processing cycle
Method, which is characterized in that include the following steps：
(1) purity nitrogen is supplemented into the nitrogen discharged manifold of dirt at suction port of compressor, the oxygen content controlled in dirty nitrogen is less than 5% (V%)；
(2) desulfurization is carried out after dirty nitrogen being cooled to 45 DEG C or less；
(3) dirty nitrogen is cooled to 2~4 DEG C, except the moisture and C in decontamination nitrogen6The above hydrocarbon component；
(4) purity nitrogen is supplemented into the inlet manifold of de- hydrocarbon absorber, the oxygen content controlled in dirty nitrogen is less than 5% (V%)；
(5) the de- hydrocarbon adsorption tower carries out adsorbing-regenerating automatically switching operation, and vacuum pump takes out regenerated de- hydrocarbon adsorption tower true
Sky desorption takes off the organic matter of hydrocarbon adsorbent kind, and resolution gas recycles or carry out burning disposal；
(6) the deoxidation adsorption tower adsorb-regenerate automatically switching operation, in regenerated deoxidation adsorption tower gas be vented to
Normal pressure；
(7) the nitrogen gas tank storage nitrogen pressure uses pressure, pressure transmitter output signal not less than tank area protection nitrogen
Control third regulating valve ensures that tank area protection nitrogen pipeline pressure reaches using pressure first, when nitrogen pipeline is protected in tank area
When pressure is not achieved using pressure, pressure transmitter output signal controls the 4th regulating valve to tank area protection nitrogen pipeline supplement
Purity nitrogen reaches using pressure.
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| CN110526223A (en) * | 2019-10-12 | 2019-12-03 | 马鞍山钢铁股份有限公司 | A kind of high pure nitrogen purifying technique and device |
| CN111215439A (en) * | 2019-10-11 | 2020-06-02 | 广西博世科环保科技股份有限公司 | Method and device for controlling oxygen content of tail gas of thermal desorption system of organic contaminated soil |
| CN112963734A (en) * | 2021-03-19 | 2021-06-15 | 嘉寓氢能源科技(辽宁)有限公司 | Hydrogenation station gas column system that unloads |
| CN116990361A (en) * | 2023-07-27 | 2023-11-03 | 内蒙古伊东集团东兴化工有限责任公司 | Device and method for solving inaccurate ORP display of membrane method denitration |
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