CN113318573B - Oil and gas processing system and process - Google Patents
Oil and gas processing system and process Download PDFInfo
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- CN113318573B CN113318573B CN202110652810.5A CN202110652810A CN113318573B CN 113318573 B CN113318573 B CN 113318573B CN 202110652810 A CN202110652810 A CN 202110652810A CN 113318573 B CN113318573 B CN 113318573B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 24
- 238000012545 processing Methods 0.000 title description 2
- 238000009833 condensation Methods 0.000 claims abstract description 101
- 230000005494 condensation Effects 0.000 claims abstract description 101
- 238000001179 sorption measurement Methods 0.000 claims abstract description 79
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000004140 cleaning Methods 0.000 claims abstract description 38
- 230000008929 regeneration Effects 0.000 claims abstract description 24
- 238000011069 regeneration method Methods 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 115
- 239000002283 diesel fuel Substances 0.000 claims description 50
- 238000011084 recovery Methods 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 31
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 27
- 238000003860 storage Methods 0.000 claims description 26
- 238000005406 washing Methods 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000003795 desorption Methods 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 239000003344 environmental pollutant Substances 0.000 claims description 7
- 231100000719 pollutant Toxicity 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 239000003595 mist Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000013517 stratification Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 116
- 239000010426 asphalt Substances 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000003502 gasoline Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003350 kerosene Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater 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
- B01D53/14—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 absorption
- B01D53/1487—Removing organic compounds
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
本发明涉及工业VOC处理系统的技术领域，特别是涉及一种油气处理系统及工艺，其可以对成分较为复杂的油气进行处理，有效降低其中的油含量，并且可以满足油气排放标准，提高对油气的处理效果，提高实用性；包括低温柴油清洗单元、深度冷凝单元和活性碳纤维吸附单元，低温柴油清洗单元输入端设置有第一尾气进口，低温柴油清洗单元输入端设置有阻火器和第一控制阀，低温柴油清洗单元输出端设置有第一输出管，第一输出管输出端通过第一连通管与深度冷凝单元连通，并在第一连通管上设置有第二尾气进口和事故排放管；该工艺包括以下步骤：S1、低温柴油清洗油气；S2、深度冷凝处理；S3、活性碳纤维吸附处理；S4、活性碳纤维再生处理。
The present invention relates to the technical field of industrial VOC treatment systems, and in particular to an oil and gas treatment system and process, which can treat oil and gas with relatively complex components, effectively reduce the oil content therein, and can meet oil and gas emission standards, improve the treatment effect of oil and gas, and improve practicality; it includes a low-temperature diesel cleaning unit, a deep condensation unit and an activated carbon fiber adsorption unit, the input end of the low-temperature diesel cleaning unit is provided with a first exhaust gas inlet, the input end of the low-temperature diesel cleaning unit is provided with a flame arrester and a first control valve, the output end of the low-temperature diesel cleaning unit is provided with a first output pipe, the output end of the first output pipe is connected with the deep condensation unit through a first connecting pipe, and a second exhaust gas inlet and an accident discharge pipe are provided on the first connecting pipe; the process includes the following steps: S1, low-temperature diesel cleaning oil and gas; S2, deep condensation treatment; S3, activated carbon fiber adsorption treatment; S4, activated carbon fiber regeneration treatment.
Description
Technical Field
The invention relates to the technical field of industrial VOC (volatile organic compounds) treatment systems, in particular to an oil gas treatment system and an oil gas treatment process.
Background
It is known that a large amount of oil gas can be generated in the production and transportation process of the refining industry, including tank field breathing oil gas, pallet loading oil gas, dock unloading oil gas and the like, crude oil, gasoline and diesel oil, aviation kerosene, wax oil, asphalt and the like are involved, the discharge of the oil gas is an object of national important supervision, the discharge standard of the oil gas is also more and more strict, the existing oil gas is generally subjected to condensation treatment, the temperature of the condensation treatment is generally-75 ℃ and an activated carbon adsorption technology is adopted, but the technologies are generally only suitable for the treatment of the oil gas with simple components, but the treated gas is difficult to reach the standard when the oil gas with complex components such as crude oil, wax oil and the like generated in the existing refining industry is treated, so that the treatment effect is poor and the practicability is poor.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention aims to provide the oil gas treatment system which can treat oil gas with complex components, effectively reduce the oil content in the oil gas, meet the oil gas emission standard, improve the treatment effect on the oil gas and improve the practicability;
The invention further aims to provide an oil gas treatment process for treating oil gas with complex components, which can effectively reduce the oil content in the oil gas, can meet the oil gas emission standard, improves the treatment effect on the oil gas and improves the practicability.
(II) technical scheme
In order to achieve the aim, the oil gas treatment system comprises a low-temperature diesel oil cleaning unit, a deep condensing unit and an activated carbon fiber adsorption unit, wherein the input end of the low-temperature diesel oil cleaning unit is provided with a first tail gas inlet, the input end of the low-temperature diesel oil cleaning unit is provided with a flame arrester and a first control valve, the output end of the low-temperature diesel oil cleaning unit is provided with a first output pipe, a first induced draft fan is arranged on the first output pipe, the output end of the first output pipe is communicated with the deep condensing unit through a first communication pipe, the first communication pipe is provided with a second tail gas inlet and an accident discharge pipe, the first communication pipe and the accident discharge pipe are respectively provided with two groups of second control valves, the first communication pipe is provided with a second induced draft fan, the deep condensing unit is communicated with the activated carbon fiber adsorption unit through a second communication pipe, the second communication pipe is provided with a buffer tank and a third control valve, and the output end of the activated carbon fiber adsorption unit is provided with an exhaust pipe.
Specifically, the low-temperature diesel oil cleaning unit comprises two groups of washing towers, a plurality of groups of packing layers and two groups of mist capturing nets are respectively arranged in the two groups of washing towers, two groups of storage tanks are respectively and communicatively arranged at the bottom of the two groups of washing towers, cooling pipelines are respectively arranged in the two groups of storage tanks, the two groups of storage tanks are respectively and communicatively connected through two groups of oil delivery pipes, the two groups of oil delivery pipe input ends are respectively arranged in the two groups of storage tanks, two groups of filter screens are respectively arranged at the two groups of oil delivery pipe input ends, two groups of oil delivery pumps are respectively arranged on the two groups of oil delivery pipes, a plurality of groups of shunt pipes are respectively and communicatively arranged on the two groups of oil delivery pipes, the multicomponent flow pipe part is fixed in the two groups of washing towers, a plurality of groups of spray heads are respectively arranged on the plurality of shunt pipes, the plurality of groups of shunt pipes are respectively provided with a plurality of groups of opening valves, the output ends of the two groups of washing towers are respectively and communicatively connected with the first output pipes, and the two groups of washing towers are respectively connected through circulation pipelines.
Specifically, the degree of depth condensing unit includes one-level condensing system, second grade condensing system and tertiary condensing system, one-level condensing system, second grade condensing system and tertiary condensing system connect gradually to be provided with heat transfer system between second grade condensing system and tertiary condensing system, and be provided with the system of returning temperature at tertiary condensing system output, one-level condensing system, second grade condensing system, tertiary condensing system, heat transfer system and return temperature system output pass through the pipeline intercommunication to with condensate recovery pipeline export intercommunication, and be provided with temporary storage tank and transfer pump on the condensate recovery pipeline.
Specifically, the activated carbon fiber adsorption unit comprises three groups of activated carbon adsorption tanks, activated carbon fiber fillers are arranged in the three groups of activated carbon adsorption tanks, the second communicating pipe is communicated with the first input ends of the three groups of activated carbon adsorption tanks through three groups of input pipes, the exhaust pipe is communicated with the first output ends of the three groups of activated carbon adsorption tanks through three groups of output pipes, and the second output ends of the three groups of activated carbon adsorption tanks are communicated with the second input ends through backflow pipelines.
Specifically, still include regeneration recovery system, regeneration recovery system sets up on activated carbon fiber adsorption unit to regeneration recovery system includes cooling system, steam input pipeline, steam condensate output pipeline, condenser, desorption fan and light component outer forced draught blower, steam input pipeline and three group activated carbon adsorption tanks intercommunication, steam condensate output pipeline and steam input pipeline intercommunication, three group activated carbon adsorption tanks third output all set up the pipeline of giving vent to anger and with the condenser intercommunication, condenser first output is provided with exhaust pipe and light component outer forced draught blower intercommunication, be provided with return pipe and steam input pipeline intercommunication on the exhaust pipe, the desorption fan sets up on return pipe, condenser second output is provided with the layering groove to be provided with recovery storage tank and decontaminated aquatic processing system at layering groove output intercommunication, recovery storage tank output and condensate recovery pipeline intercommunication, cooling system and condenser intercommunication.
Specifically, regeneration recovery system still includes gas-liquid separator, dry surface cooler, dry fan and heat exchanger, the fourth output intercommunication of three group's activated carbon adsorption tanks is provided with circulation pipeline and communicates with gas-liquid separator, gas-liquid separator output and dry surface cooler intercommunication, dry surface cooler and heat exchanger intercommunication to be provided with dry fan between dry surface cooler and heat exchanger, heat exchanger output and gas-out pipeline intercommunication, steam input pipeline and heat exchanger intercommunication, dry surface cooler and cooling system intercommunication to dry surface cooler and gas-liquid separator output all communicate with the layering groove.
Based on the oil gas treatment system, an oil gas treatment process is provided, and the process comprises the following steps:
S1, cleaning oil gas by low-temperature diesel oil, namely, introducing the oil gas into two groups of washing towers in a low-temperature diesel oil cleaning unit through a first tail gas inlet, cooling diesel oil in two groups of storage tanks through two groups of cooling pipelines, lifting the cooled diesel oil through two groups of oil delivery pipes under the action of two groups of oil delivery pumps, shunting through a multi-component flow pipe, then entering the two groups of washing towers, spraying through a plurality of groups of spray heads, enabling the diesel oil to be in countercurrent contact with the oil gas, absorbing organic matters in the oil gas through the diesel oil, absorbing saturated diesel oil, and sending the saturated diesel oil into a dirty oil system for re-refining;
S2, deep condensation treatment, namely introducing the oil gas subjected to low-temperature diesel oil cleaning or the light oil with simpler components into a first-stage condensation system through a second induced draft fan, flowing along the first-stage condensation system, a second-stage condensation system, a heat exchange system, a third-stage condensation system and a temperature return system, removing a large amount of water vapor and organic matters in the oil gas, enabling third-stage condensation exhaust to participate in heat exchange of the second-stage condensation exhaust through the heat exchange system, effectively reducing the temperature of the oil gas discharged through the second-stage condensation system, carrying out temperature return treatment on tail gas discharged through the third-stage condensation system through the temperature return system, improving the temperature of the tail gas, and discharging liquid generated by condensation through a condensation recovery pipeline;
S3, performing adsorption treatment on the activated carbon fibers, namely enabling the tail gas subjected to deep condensation treatment to enter three groups of activated carbon adsorption tanks through a second communicating pipe, adsorbing a small amount of pollutants entangled in the tail gas through the activated carbon fibers, and discharging the adsorbed gas through an exhaust pipe after reaching standards;
S4, regenerating the activated carbon fibers, namely, when the activated carbon fibers are adsorbed and saturated, introducing low-pressure steam to regenerate the activated carbon fibers, desorbing the organic matters adsorbed on the activated carbon fibers, taking the organic matters out of the activated carbon fibers along with the steam, entering the condenser, liquefying the activated carbon fibers in the condenser to form negative pressure, completing the desorption of the rest organic matters, drying the activated carbon fibers by a drying fan, performing gas-liquid separation on the gas discharged from the three groups of activated carbon adsorption tanks by a gas-liquid separator, cooling the gas discharged from the three groups of activated carbon adsorption tanks by a surface air dryer, removing part of water vapor, performing heat exchange by the drying fan, and then performing reflux through a third output end of the activated carbon adsorption tank to form circulation, and discharging the gas recovered by the condenser, the gas-liquid separator and the drying surface air cooler through a condensate recovery pipeline.
Specifically, cold sources in two groups of cooling pipelines in the low-temperature diesel cleaning unit are derived from cold energy provided by a compressor of the deep condensing unit, the temperature of diesel is 7-15 ℃, the air flow rate of a washing tower is set to be 0.3-0.8 m/s, the liquid-gas ratio of low-temperature diesel to oil gas is more than or equal to 5.5L/m 3, and the contact time of the low-temperature diesel to the oil gas is more than or equal to 6s.
Specifically, the condensation temperature of the primary condensation system is 0-2 ℃, the condensation temperature of the secondary condensation system is-35 ℃, the condensation temperature of the tertiary condensation system is-110 to-130 ℃, and the temperature return temperature of the temperature return system is 0-2 ℃.
(III) beneficial effects
Compared with the prior art, the invention provides an oil gas treatment system and process, which have the following beneficial effects:
according to the oil gas treatment system, heavy oil such as crude oil gas, asphalt tail gas and wax oil tail gas can be sequentially and continuously treated through the low-temperature diesel oil cleaning unit, the deep condensing unit and the activated carbon fiber adsorption unit, and light oil such as gasoline and diesel oil, aviation kerosene, naphtha and aluminum foil oil can be treated only through the deep condensing unit and the activated carbon fiber adsorption unit, the treated gas can meet the requirements of local emission standards, and the three units are connected in series, so that all components in oil gas can be completely treated, and near zero emission is realized;
The application designs a low-temperature diesel oil cleaning unit, wherein most hydrocarbon substances and benzene molecules in crude oil, light oil and wax oil asphalt tail gas are nonpolar or weak polar, diesel oil is used as a nonpolar organic solvent, and the diesel oil is extremely easy to absorb organic substances in oil products and asphalt tail gas according to the principle of similar miscibility, namely the organic substances are mutually soluble;
The oil gas treatment system is provided with the deep condensing unit, is divided into three stages of condensing devices with different temperatures and heat exchange energy-saving devices, can deeply condense oil gas to the minimum of-110 to-130 ℃, and remove most of the oil gas, so that pollutant emission is reduced, and the oil gas treatment system is more energy-saving and environment-friendly, wherein:
The primary condensation temperature is 0-2 ℃ (the temperature is adjustable), most of water vapor is mainly removed in the primary condensation, and the reduction or damage of equipment treatment efficiency caused by icing in the subsequent condensation process is avoided;
the oil gas after primary condensation and dehydration enters secondary condensation, and the secondary condensation temperature is minus 35 ℃;
The temperature of the oil gas is reduced to minus 110 to minus 130 ℃ by three-stage condensation, and most components in the oil gas are changed from gas state to liquid state and separated from the oil gas;
an intermediate heat exchanger is arranged between the three-stage condensation and the two-stage condensation, the exhaust gas of the three-stage condensation participates in the heat exchange of the exhaust gas of the two-stage condensation, so that the oil gas temperature after the two-stage condensation is reduced, the energy consumption of the three-stage refrigeration compressor unit is reduced, and the energy is saved;
meanwhile, rewarming is carried out on the tail gas subjected to three-stage condensation, so that the temperature of oil gas subjected to condensation treatment is increased, and the situation of freezing and frost cracking of a pipeline is reduced;
because the deep condensing unit is a pure physical process, the liquid condensed in each device is qualified oil product and can be directly sent into a finished product tank;
The oil gas treatment system is provided with an active carbon fiber adsorption unit, oil gas enters the active carbon fiber adsorption unit after passing through a low temperature Chai Youxi and a deep condensing unit, residual small amount of pollutants are adsorbed, the adsorbed gas is discharged after reaching standards, and the active carbon fiber is regenerated by steam after being adsorbed and saturated;
when the activated carbon fiber adsorption unit is regenerated, a recovery storage tank is used, a light component external blower is designed, a very small amount of light components such as C2 and C3 are used, the light component external blower is started according to the front-end pressure during regeneration, and is used as raw material to be fed outwards, and the steam regeneration liquid containing the heavy components is hermetically fed into a sewage treatment system for biochemical treatment.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of a low temperature diesel cleaning unit;
FIG. 3 is a schematic diagram of the structure of the deep condensing unit;
FIG. 4 is a schematic diagram of the structure of an activated carbon fiber adsorption unit and a regeneration recovery system;
The reference sign is 1, a low-temperature diesel oil cleaning unit; 2, a deep condensing unit, 3, an activated carbon fiber adsorption unit, 4, a first tail gas inlet, 5, a flame arrester, 6, a first control valve, 7, a first output pipe, 8, a first induced draft fan, 9, a first communication pipe, 10, a second tail gas inlet, 11, an accident discharge pipe, 12, a second control valve, 13, a second induced draft fan, 14, a buffer tank, 15, a third control valve, 16, an exhaust pipe, 17, a regeneration recovery system, 18, a second communication pipe;
the low-temperature diesel cleaning unit comprises a 101, a washing tower, a 102, a packing layer, a 103, a mist capturing net, a 104, a storage tank, a 105, a cooling pipeline, a 106, an oil delivery pipe, a 107, a filter screen, a 108, an oil delivery pump, a 109, a shunt pipe, a 110, a spray head, a 111, an opening valve, a 112 and a circulation pipeline;
the deep condensing unit comprises a primary condensing system 201, a secondary condensing system 202, a tertiary condensing system 203, a heat exchange system 204, a temperature return system 205, a condensate recovery pipeline 206, a temporary storage tank 207, a temporary storage tank 208 and a transmission pump;
the active carbon fiber adsorption unit comprises an active carbon adsorption tank 301, an active carbon fiber filler 302, an input pipe 303, an output pipe 304, an output pipe 305 and a return pipe;
The regeneration recovery system comprises 1701, a cooling system, 1702, a steam input pipeline, 1703, a steam condensate output pipeline, 1704, a condenser, 1705, a desorption fan, 1706, a light component external blower, 1707, an air outlet pipeline, 1708, a discharge pipeline, 1709, a return pipeline, 1710, a layering tank, 1711, a recovery storage tank, 1712, a decontaminated water treatment system, 1713, a gas-liquid separator, 1714, a drying surface cooler, 1715, a drying fan, 1716, a heat exchanger, 1717 and a circulation pipeline.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, an oil gas treatment system includes a low temperature diesel cleaning unit 1, a deep condensation unit 2 and an activated carbon fiber adsorption unit 3, wherein the input end of the low temperature diesel cleaning unit 1 is provided with a first tail gas inlet 4, the input end of the low temperature diesel cleaning unit 1 is provided with a flame arrester 5 and a first control valve 6, the output end of the low temperature diesel cleaning unit 1 is provided with a first output pipe 7, the first output pipe 7 is provided with a first induced draft fan 8, the output end of the first output pipe 7 is communicated with the deep condensation unit 2 through a first communication pipe 9, the first communication pipe 9 is provided with a second tail gas inlet 10 and an accident discharge pipe 11, the first communication pipe 9 and the accident discharge pipe 11 are respectively provided with two groups of second control valves 12, the first communication pipe 9 is communicated with the activated carbon fiber adsorption unit 3 through a second communication pipe 18, the second communication pipe 18 is provided with a buffer tank 14 and a third control valve 15, the output end of the activated carbon fiber adsorption unit 3 is provided with an accident discharge pipe 16, and the accident discharge pipe 11 is communicated with the accident discharge pipe 16.
The low-temperature diesel oil cleaning unit 1 comprises two groups of washing towers 101, a plurality of groups of packing layers 102 and two groups of mist capturing nets 103 are respectively arranged in the two groups of washing towers 101, two groups of storage tanks 104 are respectively arranged at the bottoms of the two groups of washing towers 101 in a communicated mode, cooling pipelines 105 are respectively arranged in the two groups of storage tanks 104, the two groups of storage tanks 104 are respectively communicated through two groups of oil delivery pipes 106, the input ends of the two groups of oil delivery pipes 106 are respectively arranged in the two groups of storage tanks 104, two groups of filter screens 107 are respectively arranged at the input ends of the two groups of oil delivery pipes 106, two groups of oil delivery pipes 106 are respectively provided with two groups of oil delivery pumps 108, the two groups of oil delivery pipes 106 are respectively communicated with a plurality of groups of shunt pipes 109, the multicomponent flow pipes 109 are partially fixed in the two groups of washing towers 101, the multicomponent flow pipes 109 are respectively provided with a plurality of spray heads 110, the output ends of the two groups of washing towers 101 are respectively communicated with the first output pipes 7, and the two groups of washing towers 101 are communicated through the circulation pipelines.
The deep condensation unit 2 comprises a primary condensation system 201, a secondary condensation system 202 and a tertiary condensation system 203, wherein the primary condensation system 201, the secondary condensation system 202 and the tertiary condensation system 203 are sequentially connected, a heat exchange system 204 is arranged between the secondary condensation system 202 and the tertiary condensation system 203, a temperature return system 205 is arranged at the output end of the tertiary condensation system 203, the output ends of the primary condensation system 201, the secondary condensation system 202, the tertiary condensation system 203, the heat exchange system 204 and the temperature return system 205 are communicated through pipelines, and are communicated with the outlet of a condensate pipeline 206, and a temporary storage tank 207 and a transmission pump 208 are arranged on the condensate pipeline 206.
The activated carbon fiber adsorption unit 3 comprises three groups of activated carbon adsorption tanks 301, activated carbon fiber fillers 302 are arranged in the three groups of activated carbon adsorption tanks 301, the second communicating pipe 18 is communicated with the first input ends of the three groups of activated carbon adsorption tanks 301 through three groups of input pipes 303, the exhaust pipe 16 is communicated with the first output ends of the three groups of activated carbon adsorption tanks 301 through three groups of output pipes 304, and the second output ends of the three groups of activated carbon adsorption tanks 301 are communicated with the second input ends through return pipes 305.
Also included is a regeneration recovery system 17, the regeneration recovery system 17 being disposed on the activated carbon fiber adsorption unit 3, and the regeneration recovery system 17 comprising a cooling system 1701, a steam input pipe 1702, a steam condensate output pipe 1703, a condenser 1704, a desorption fan 1705, and a light fraction external blower 1706, the steam input pipe 1702 being in communication with the three groups of activated carbon adsorption tanks 301, the steam condensate output pipe 1703 being in communication with the steam input pipe 1702, the three groups of activated carbon adsorption tanks 301 each having a third output end provided with an outlet pipe 1707 and in communication with the condenser 1704, the condenser 1704 having a first output end provided with a discharge pipe 1708 in communication with the light fraction external blower 1706, the discharge pipe 1708 having a return pipe 1709 in communication with the steam input pipe 1702, the desorption fan 1705 being disposed on the return pipe 1709, the condenser 1704 having a second output end provided with a stratification tank 1710, and a recovery tank 1711 and a decontaminated water treatment system 1712 are arranged at the output end of the layering tank 1710 in a communicated manner, the output end of the recovery tank 1711 is communicated with the condensate pipeline 206, the cooling system 1701 is communicated with the condenser 1704, the regeneration recovery system 17 further comprises a gas-liquid separator 1713, a drying surface cooler 1714, a drying fan 1715 and a heat exchanger 1716, the fourth output end of the three groups of activated carbon adsorption tanks 301 is communicated with a circulating pipeline 1717 and is communicated with the gas-liquid separator 1713, the output end of the gas-liquid separator 1713 is communicated with the drying surface cooler 1714, the drying surface cooler 1714 is communicated with the heat exchanger 1716, a drying fan 1715 is arranged between the drying surface cooler 1714 and the heat exchanger 1716, the output end of the heat exchanger 1716 is communicated with the air outlet pipeline 1707, the steam input pipeline 1702 is communicated with the heat exchanger 1716, the drying surface cooler 1714 is communicated with the cooling system 1701, and the output ends of the drying surface cooler 1714 and the gas-liquid separator 1713 are all communicated with the layering tank 1710.
Based on the oil gas treatment system, an oil gas treatment process is provided, and the process comprises the following steps:
S1, cleaning oil gas by low-temperature diesel oil, namely, introducing the oil gas into two groups of washing towers in a low-temperature diesel oil cleaning unit through a first tail gas inlet, cooling diesel oil in two groups of storage tanks through two groups of cooling pipelines, lifting the cooled diesel oil through two groups of oil delivery pipes under the action of two groups of oil delivery pumps, shunting through a multi-component flow pipe, then entering the two groups of washing towers, spraying through a plurality of groups of spray heads, enabling the diesel oil to be in countercurrent contact with the oil gas, absorbing organic matters in the oil gas through the diesel oil, absorbing saturated diesel oil, and sending the saturated diesel oil into a dirty oil system for re-refining;
S2, deep condensation treatment, namely introducing oil gas subjected to low-temperature diesel oil cleaning or light oil with simpler components into a first-stage condensation system through a second induced draft fan, flowing along the first-stage condensation system, a second-stage condensation system, a heat exchange system, a third-stage condensation system and a temperature return system, removing a large amount of water vapor and organic components in the oil gas, enabling third-stage condensation exhaust to participate in heat exchange of the second-stage condensation exhaust through the heat exchange system, effectively reducing the temperature of the oil gas discharged through the second-stage condensation system, performing temperature return treatment on the tail gas discharged through the third-stage condensation system through the temperature return system, improving the temperature of the tail gas, discharging liquid generated by condensation through a condensate pipeline, wherein the condensation temperature of the first-stage condensation system is 0-2 ℃, the condensation temperature of the second-stage condensation system is-35 ℃, the condensation temperature of the third-stage condensation system is-110 to-130 ℃, and the temperature return system is 0-2 ℃;
S3, performing adsorption treatment on the activated carbon fibers, namely enabling the tail gas subjected to deep condensation treatment to enter three groups of activated carbon adsorption tanks through a second communicating pipe, adsorbing a small amount of pollutants entangled in the tail gas through the activated carbon fibers, and discharging the adsorbed gas through an exhaust pipe after reaching standards;
S4, regenerating the activated carbon fiber, namely, when the activated carbon fiber is saturated in adsorption, introducing low-pressure steam to regenerate the activated carbon fiber, desorbing the organic matters adsorbed on the activated carbon fiber, taking the desorbed organic matters out of the activated carbon fiber along with the steam into a condenser, liquefying the activated carbon fiber in the condenser to form negative pressure, completing the desorption of other organic matters, drying the activated carbon fiber by a drying fan, separating gas and liquid of the gas discharged from three groups of activated carbon adsorption tanks by a gas-liquid separator, cooling the gas in a surface air-cooling dryer, removing part of water vapor, carrying out heat exchange by the drying fan, refluxing the gas through a third output end of the activated carbon adsorption tank to form circulation, discharging the gas recovered by the condenser, the gas-liquid separator and the drying surface air cooler by a condensate recovery pipeline,
According to the oil gas treatment system, heavy oil such as crude oil gas, asphalt tail gas and wax oil tail gas can be sequentially and continuously treated through the low-temperature diesel oil cleaning unit, the deep condensing unit and the activated carbon fiber adsorption unit, and light oil such as gasoline and diesel oil, aviation kerosene, naphtha and aluminum foil oil can be treated only through the deep condensing unit and the activated carbon fiber adsorption unit, the treated gas can meet the requirements of local emission standards, and the three units are connected in series, so that all components in oil gas can be completely treated, and near zero emission is realized;
The application designs a low-temperature diesel oil cleaning unit, wherein most hydrocarbon substances and benzene molecules in crude oil, light oil and wax oil asphalt tail gas are nonpolar or weak polar, diesel oil is used as a nonpolar organic solvent, and the diesel oil is extremely easy to absorb organic substances in oil products and asphalt tail gas according to the principle of similar miscibility, namely the organic substances are mutually soluble;
The oil gas treatment system is provided with the deep condensing unit, is divided into three stages of condensing devices with different temperatures and heat exchange energy-saving devices, can deeply condense oil gas to the minimum of-110 to-130 ℃, and remove most of the oil gas, so that pollutant emission is reduced, and the oil gas treatment system is more energy-saving and environment-friendly, wherein:
The primary condensation temperature is 0-2 ℃ (the temperature is adjustable), most of water vapor is mainly removed in the primary condensation, and the reduction or damage of equipment treatment efficiency caused by icing in the subsequent condensation process is avoided;
the oil gas after primary condensation and dehydration enters secondary condensation, and the secondary condensation temperature is minus 35 ℃;
The temperature of the oil gas is reduced to minus 110 to minus 130 ℃ by three-stage condensation, and most components in the oil gas are changed from gas state to liquid state and separated from the oil gas;
an intermediate heat exchanger is arranged between the three-stage condensation and the two-stage condensation, the exhaust gas of the three-stage condensation participates in the heat exchange of the exhaust gas of the two-stage condensation, so that the oil gas temperature after the two-stage condensation is reduced, the energy consumption of the three-stage refrigeration compressor unit is reduced, and the energy is saved;
meanwhile, rewarming is carried out on the tail gas subjected to three-stage condensation, so that the temperature of oil gas subjected to condensation treatment is increased, and the situation of freezing and frost cracking of a pipeline is reduced;
because the deep condensing unit is a pure physical process, the liquid condensed in each device is qualified oil product and can be directly sent into a finished product tank;
The oil gas treatment system and the process are characterized in that an activated carbon fiber adsorption unit is designed, oil gas enters the activated carbon fiber adsorption unit after passing through a low temperature Chai Youxi and a deep condensing unit, residual small amount of pollutants are adsorbed, the adsorbed gas is discharged after reaching standards, and the activated carbon fiber is regenerated by steam after being adsorbed and saturated;
when the activated carbon fiber adsorption unit is regenerated, a recovery storage tank is used, a light component external blower is designed, a very small amount of light components such as C2 and C3 are used, the light component external blower is started according to the front-end pressure during regeneration, and is used as raw material to be fed outwards, and the steam regeneration liquid containing the heavy components is hermetically fed into a sewage treatment system for biochemical treatment.
The method comprises the steps of enabling condensed oil gas to enter an activated carbon fiber adsorption unit, adsorbing residual organic pollutants in the oil gas into micropores of the activated carbon fiber under the action of Van der Waals force, adopting a multistage adsorption process by the adsorption unit, alternately using and regenerating, automatically switching through program control, thereby ensuring continuous operation and continuous treatment capacity of the whole set of adsorption system, ensuring the treatment capacity of equipment not to be affected when the equipment regenerates, finally discharging the oil gas up to standard, introducing low-pressure steam to regenerate the activated carbon fiber when the activated carbon fiber adsorption unit reaches the set regeneration time, desorbing the organic matters adsorbed on the activated carbon fiber, blowing out mixed steam containing water steam and the organic steam by means of steam, sending the mixed steam into a recovery system, then starting a desorption fan, blowing the water steam in a condenser, liquefying the water steam, enabling the inside the activated carbon fiber adsorption tank to form negative pressure, enabling the residual adsorbate to be separated from the micropores of the fiber under the negative pressure, finishing the vacuum regeneration flow of the activated carbon fiber, finally starting a drying fan to dry the activated carbon fiber adsorption device, introducing the gas into the equipment after the air through a heater to heat, introducing the air into the equipment to separate the air, separating the air from the air, cooling the residual air, and recycling the air. After drying, the water contained in the activated carbon fiber is completely removed, the whole regeneration process is finished, the equipment is put into use again, the mixed gas containing water vapor and organic vapor generated during the regeneration of the activated carbon fiber flows into a specially designed separating device through the mixed condensate after being condensed by a condensing heat exchanger and the condensate flowing out of the bottom of an absorber, the waste water after layering is discharged into a sewage pipeline through oil-water separation, and the gasoline condensate flows into a metering tank through self-flow and is recycled with the gasoline condensate collected by a condensing unit.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The electrical components appearing in the paper are all electrically connected with an external master controller and 380V industrial equipment, and the master controller can be a conventional known device for controlling a computer and the like.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an oil gas treatment system, a serial communication port, including low temperature diesel oil cleaning unit (1), degree of depth condensing unit (2) and active carbon fiber adsorption unit (3), low temperature diesel oil cleaning unit (1) input is provided with first tail gas import (4) to be provided with flame arrester (5) and first control valve (6) at low temperature diesel oil cleaning unit (1) input, and low temperature diesel oil cleaning unit (1) output is provided with first output tube (7), and is provided with first draught fan (8) on first output tube (7), first output tube (7) output is through first connecting pipe (9) and degree of depth condensing unit (2) intercommunication to be provided with second tail gas import (10) and accident discharge pipe (11) on first connecting pipe (9), be provided with two sets of second control valve (12) on first connecting pipe (9) and the accident discharge pipe (11) respectively, the intercommunication is provided with second draught fan (13) on first connecting pipe (9), degree of depth condensing unit (2) are provided with first draught fan (8) on first output tube (18) and active carbon fiber adsorption unit (3) and are provided with on second connecting pipe (16) and active carbon adsorption unit (3) and are provided with active carbon adsorption unit (16), the accident discharge pipe (11) is communicated with an exhaust pipe (16);
The low-temperature diesel oil cleaning unit (1) comprises two groups of washing towers (101), a plurality of groups of packing layers (102) and two groups of mist capturing nets (103) are respectively arranged in the two groups of washing towers (101), two groups of storage tanks (104) are respectively communicated with the bottom of the two groups of washing towers (101), cooling pipelines (105) are respectively arranged in the two groups of storage tanks (104), the two groups of storage tanks (104) are respectively communicated through two groups of oil delivery pipes (106), the input ends of the two groups of oil delivery pipes (106) are respectively positioned in the two groups of storage tanks (104), two groups of filter screens (107) are respectively arranged at the input ends of the two groups of oil delivery pipes (106), two groups of oil delivery pumps (108) are respectively arranged on the two groups of oil delivery pipes (106), a plurality of shunt pipes (109) are respectively communicated with each other, the multicomponent flow pipes (109) are partially fixed in the two groups of washing towers (101), a plurality of spray heads (110) are respectively arranged on the multicomponent flow pipes (109), the multicomponent pipes (109) are respectively provided with two groups of oil delivery pipes (111), and the two groups of oil delivery pipes (101) are respectively communicated with the two groups of washing towers (101) through the two groups of circulating pipes (101), and the two groups of circulating pipes (101) are respectively;
The deep condensing unit (2) comprises a primary condensing system (201), a secondary condensing system (202) and a tertiary condensing system (203), wherein the primary condensing system (201), the secondary condensing system (202) and the tertiary condensing system (203) are sequentially connected, a heat exchange system (204) is arranged between the secondary condensing system (202) and the tertiary condensing system (203), a temperature return system (205) is arranged at the output end of the tertiary condensing system (203), and the output ends of the primary condensing system (201), the secondary condensing system (202), the tertiary condensing system (203), the heat exchange system (204) and the temperature return system (205) are communicated through pipelines and are communicated with the outlet of a condensate pipeline (206), and a temporary storage tank (207) and a transmission pump (208) are arranged on the condensate pipeline (206);
The activated carbon fiber adsorption unit (3) comprises three groups of activated carbon adsorption tanks (301), activated carbon fiber fillers (302) are arranged in the three groups of activated carbon adsorption tanks (301), the second communicating pipe (18) is communicated with the first input ends of the three groups of activated carbon adsorption tanks (301) through three groups of input pipes (303), the exhaust pipe (16) is communicated with the first output ends of the three groups of activated carbon adsorption tanks (301) through three groups of output pipes (304), and the second output ends of the three groups of activated carbon adsorption tanks (301) are communicated with the second input ends through return pipes (305);
The system also comprises a regeneration recovery system (17), the regeneration recovery system (17) is arranged on the activated carbon fiber adsorption unit (3), and the regeneration recovery system (17) comprises a cooling system (1701), a steam input pipeline (1702), a steam condensate output pipeline (1703), a condenser (1704), a desorption fan (1705) and a light component external blower (1706), the steam input pipeline (1702) is communicated with three groups of activated carbon adsorption tanks (301), the steam condensate output pipeline (1703) is communicated with the steam input pipeline (1702), the three groups of activated carbon adsorption tanks (301) are respectively provided with an air outlet pipeline (1707) and communicated with the condenser (1704), a first output end of the condenser (1704) is provided with a discharge pipeline (1708) and is communicated with the light component external blower (1706), the discharge pipeline (1708) is provided with a return pipeline (1709) and is communicated with the steam input pipeline (1702), the desorption fan (1705) is arranged on the return pipeline (1709), a second output end of the condenser (1710) is provided with a condensate stratification tank (1712) and a recovery tank (1711) are communicated with the water recovery tank (1711) and the recovery tank (1711) are respectively arranged at the output end of the recovery tank (1711), the cooling system (1701) is in communication with a condenser (1704).
2. The oil-gas treatment system according to claim 1, wherein the regeneration recovery system (17) further comprises a gas-liquid separator (1713), a drying surface cooler (1714), a drying fan (1715) and a heat exchanger (1716), the fourth output ends of the three groups of activated carbon adsorption tanks (301) are communicated with a circulation pipeline (1717) and are communicated with the gas-liquid separator (1713), the output ends of the gas-liquid separator (1713) are communicated with the drying surface cooler (1714), the drying surface cooler (1714) is communicated with the heat exchanger (1716), a drying fan (1715) is arranged between the drying surface cooler (1714) and the heat exchanger (1716), the output ends of the heat exchanger (1716) are communicated with an air outlet pipeline (1707), the steam input pipeline (1702) is communicated with the heat exchanger (1716), the drying surface cooler (1714) is communicated with the cooling system (1701), and the output ends of the drying surface cooler (1714) and the gas-liquid separator (1713) are communicated with the layering grooves (1713).
3. A hydrocarbon treatment process, based on a hydrocarbon treatment system as claimed in any one of claims 1-2, comprising the steps of:
S1, cleaning oil gas by low-temperature diesel oil, namely, introducing the oil gas into two groups of washing towers in a low-temperature diesel oil cleaning unit through a first tail gas inlet, cooling diesel oil in two groups of storage tanks through two groups of cooling pipelines, lifting the cooled diesel oil through two groups of oil delivery pipes under the action of two groups of oil delivery pumps, shunting through a multi-component flow pipe, then entering the two groups of washing towers, spraying through a plurality of groups of spray heads, enabling the diesel oil to be in countercurrent contact with the oil gas, absorbing organic matters in the oil gas through the diesel oil, absorbing saturated diesel oil, and sending the saturated diesel oil into a dirty oil system for re-refining;
S2, deep condensation treatment, namely introducing the oil gas subjected to low-temperature diesel oil cleaning or the light oil with simpler components into a first-stage condensation system through a second induced draft fan, flowing along the first-stage condensation system, a second-stage condensation system, a heat exchange system, a third-stage condensation system and a temperature return system, removing a large amount of water vapor and organic matters in the oil gas, enabling third-stage condensation exhaust to participate in heat exchange of the second-stage condensation exhaust through the heat exchange system, effectively reducing the temperature of the oil gas discharged through the second-stage condensation system, carrying out temperature return treatment on tail gas discharged through the third-stage condensation system through the temperature return system, improving the temperature of the tail gas, and discharging liquid generated by condensation through a condensation recovery pipeline;
S3, performing adsorption treatment on the activated carbon fibers, namely enabling the tail gas subjected to deep condensation treatment to enter three groups of activated carbon adsorption tanks through a second communicating pipe, adsorbing a small amount of pollutants entangled in the tail gas through the activated carbon fibers, and discharging the adsorbed gas through an exhaust pipe after reaching standards;
S4, regenerating the activated carbon fibers, namely, when the activated carbon fibers are adsorbed and saturated, introducing low-pressure steam to regenerate the activated carbon fibers, desorbing the organic matters adsorbed on the activated carbon fibers, taking the organic matters out of the activated carbon fibers along with the steam, entering the condenser, liquefying the activated carbon fibers in the condenser to form negative pressure, completing the desorption of the rest organic matters, drying the activated carbon fibers by a drying fan, performing gas-liquid separation on the gas discharged from the three groups of activated carbon adsorption tanks by a gas-liquid separator, cooling the gas discharged from the three groups of activated carbon adsorption tanks by a surface air dryer, removing part of water vapor, performing heat exchange by the drying fan, and then performing reflux through a third output end of the activated carbon adsorption tank to form circulation, and discharging the gas recovered by the condenser, the gas-liquid separator and the drying surface air cooler through a condensate recovery pipeline.
4. The oil-gas treatment process according to claim 3, wherein cold sources in two groups of cooling pipelines in the low-temperature diesel cleaning unit are derived from cold energy provided by a compressor of the deep condensing unit, the temperature of diesel is 7-15 ℃, the air flow rate of a washing tower is set to be 0.3-0.8 m/s, the liquid-gas ratio of the low-temperature diesel to the oil gas is more than or equal to 5.5L/m 3, and the contact time of the low-temperature diesel to the oil gas is more than or equal to 6s.
5. The oil-gas treatment process according to claim 3, wherein the condensation temperature of the primary condensation system is 0-2 ℃, the condensation temperature of the secondary condensation system is-35 ℃, the condensation temperature of the tertiary condensation system is-110-130 ℃, and the temperature return temperature of the temperature return system is 0-2 ℃.
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