CN113559674B - Flexible buffer adsorption purification zero-emission system and method - Google Patents
Flexible buffer adsorption purification zero-emission system and method Download PDFInfo
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—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
- B01D53/06—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 moving adsorbents, e.g. rotating beds
- B01D53/08—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 moving adsorbents, e.g. rotating beds according to the "moving bed" method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The embodiment of the invention discloses a flexible buffer adsorption purification zero-emission system, which comprises: unit, flexible buffer unit and oil storage tank district are retrieved in the condensation, wherein, the unit is retrieved in the condensation is used for retrieving oil storage tank district oil gas, flexible buffer unit is used for right the unit is retrieved in the condensation surplus gas and is kept in after to carry gas transport to oil storage tank district when oil storage uninstallation and temperature reduce in the oil storage tank district. This scheme, when improving purification efficiency, reduce running cost, accomplish the zero release of oil storage tank district evaporation oil gas, thoroughly eliminate oil gas evaporation loss, the elimination potential safety hazard that oil storage tank district "big small respiration" caused and the pollution that causes the atmospheric environment on every side.
Description
Technical Field
The embodiment of the application relates to the technical field of environmental protection, in particular to a flexible buffer adsorption and purification zero-emission system.
Background
The crude oil and light oil products stored and circulated in the oil storage tank area contain a large amount of light hydrocarbon components, have strong volatility, and bring serious potential safety hazards, environmental pollution, energy waste and economic loss to enterprises and society. Therefore, the effort of reducing the evaporation loss and the loss and pollution caused by 'breathing in and out' is a work with great significance in the construction of energy reserves in China.
In recent years, along with the increasing attention to energy conservation, environmental protection and safety problems at home and abroad, particularly the 'double-carbon' strategy proposed by China, governments at all levels have paid extensive attention to VOC waste gas treatment, but the policy of 'standard discharge' is still implemented at present, the application market basically adopts a fixed adsorption bed for dealing with the VOC waste gas treatment, and the basic forms of activated carbon, carbon fiber, adsorption resin, zeolite molecular sieve, honeycomb adsorption rotating wheel and the like are fixed bed structures no matter the process route is selected, so that the defects of the fixed adsorption bed are gradually shown in the long-term use process, and the popularization and development of the adsorbable VOC organic waste gas treatment process in the fixed bed form are influenced. The main defects are as follows:
(1) potential safety hazards exist in regeneration;
(2) the regeneration is not thorough, the adsorption efficiency is continuously reduced, and the whole life cycle is short;
(3) the waste active carbon and the like have secondary pollution;
(4) the shock resistance load variability is poor, the fixed bed adsorption efficiency is unstable, and the standard discharge is unstable;
(5) most of the configured post-treatment processes are thermal oxidation types in different forms, and have the advantages of carbon dioxide emission and carbon emission.
Disclosure of Invention
The embodiment of the invention provides a flexible buffering, adsorbing and purifying zero-emission system, which aims at an innovative process for recovering and purifying VOC (volatile organic compounds) organic waste gas in an oil storage tank area, is based on the brand-new thought of a zero-emission framework, is used for driving an oil gas recovery, purifying and treatment technical process, adopts a dynamic adsorption bed to replace a static fixed adsorption bed which is used in a large amount in the existing market, and is matched with a condensed, recovered and purified gas storage and buffer device, so that the purification efficiency is improved, the operation cost is reduced, the zero emission of evaporated oil gas in the oil storage tank area is realized, the oil gas evaporation loss caused by large and small respiration in the oil storage tank area is thoroughly eliminated, and potential safety hazards and pollution to the surrounding atmospheric environment are eliminated.
The embodiment of the invention provides a flexible buffer adsorption purification zero-emission system, which comprises: unit, flexible buffer unit and oil storage tank district are retrieved in the condensation, wherein, the unit is retrieved in the condensation is used for retrieving oil storage tank district oil gas, flexible buffer unit is used for right the unit is retrieved in the condensation surplus gas and is kept in after to carry gas transport to oil storage tank district when oil storage uninstallation and temperature reduce in the oil storage tank district.
Optionally, the oil storage tank district includes a plurality of continuous with the quality oil storage tank, and wherein each oil storage tank is controlled to be in the linkage state, flexible buffer unit specifically is used for carrying out the oil storage uninstallation and when temperature reduces in the oil storage tank district, the inside negative pressure that produces of oil storage tank opens flexible buffer unit's linkage adjusting valve, so that the gas of keeping in among the flexible buffer unit is carried to each oil storage tank.
Optionally, the flexible buffer unit comprises a tower body, a windproof bracket, a flexible tower body lifting device, a spray cooling device, an exhaust fan, a linkage adjusting valve and a monitoring instrument.
Optionally, the tower body is a round-through sharp-top-shaped closed foldable lifting device formed by bonding flexible materials, and the linkage of the air pumping and exhausting fan and the linkage adjusting valve with the size of the connected oil storage tanks with the same quality is realized through the control of the air pumping and exhausting fan and the linkage adjusting valve.
Optionally, the condensation recovery unit comprises a precooler, a mechanical refrigeration unit or/and a liquid nitrogen refrigeration unit.
Optionally, the system further comprises an adsorption and desorption regeneration unit, the adsorption and desorption regeneration unit can be arranged for standby, and the adsorption and desorption regeneration unit is in a standby state under the condition that the condensation recovery unit meets the normal operation of the oil storage tank area; when the production running condition of the oil storage tank area is abnormal or needs to be started during the adsorption and regeneration unit, the adsorption and desorption regeneration unit is started and adsorbs the gas generated in the oil storage tank area, and the gas after adsorption and purification is sent to the flexible buffer unit.
Optionally, the adsorption and desorption regeneration unit comprises a box body, a plurality of layers of dynamic adsorption filter beds, an air flow uniform distribution device, a desorption regeneration device, an exhaust port, an exhaust fan, an exhaust pipeline and a linkage adjusting valve.
Optionally, the adsorption-desorption regeneration unit is specifically configured to:
when the adsorption and desorption regeneration unit is started, oil gas airflow to be purified enters through a gas inlet in the adsorption and desorption regeneration unit, the oil gas airflow entering uniformly upwards enters each level of adsorption layer through the airflow uniform distribution device, the oil gas airflow passes through the multilayer dynamic adsorption filter bed to be adsorbed layer by layer, and the adsorbed gas is circularly conveyed to the flexible buffer unit.
In a second aspect, the invention also provides a flexible buffer adsorption purification zero-emission method, which comprises the following steps:
the condensation recovery unit recovers oil gas in an oil storage tank area, wherein the oil storage tank area comprises a plurality of connected oil storage tanks with the same quality, and each oil storage tank is controlled to be in a linkage state;
the flexible buffer unit temporarily stores the residual gas after the condensation recovery unit recovers, when the oil storage tank area is subjected to oil storage unloading and the air temperature is reduced, negative pressure is generated inside the oil storage tank, and a linkage adjusting valve of the flexible buffer unit is opened, so that the gas temporarily stored in the flexible buffer unit is conveyed to each oil storage tank;
The adsorption and desorption regeneration unit is started, oil gas airflow to be purified enters through a gas inlet in the adsorption and desorption regeneration unit, the oil gas airflow entering uniformly upwards enters into all levels of adsorption layers through the airflow uniform distribution device, the oil gas airflow passes through the multiple layers of dynamic adsorption filter beds to be adsorbed layer by layer, and the adsorbed gas is conveyed to the flexible buffer unit in a circulating manner.
This scheme provides a flexible buffer adsorbs purifies zero emission system includes: unit, flexible buffer unit and oil storage tank district are retrieved in the condensation, wherein, the unit is retrieved in the condensation is used for retrieving oil storage tank district oil gas, flexible buffer unit is used for right the remaining gas after the unit is retrieved in the condensation keeps in to carry gas transport to oil storage tank district when oil storage tank district carries out the oil storage uninstallation and temperature reduces. The purification efficiency is improved, the operation cost is reduced, meanwhile, zero emission of evaporated oil gas in the oil storage tank area is achieved, oil gas evaporation loss caused by 'breathing in size' in the oil storage tank area is thoroughly eliminated, potential safety hazards are eliminated, and pollution to the surrounding atmospheric environment is eliminated.
The beneficial effect of this scheme lies in:
(1) the VOCs condensation, recovery, adsorption and purification zero-emission system of the flexible buffer tower is designed with corresponding materials, specifications and models according to the VOC organic waste gas treatment characteristics, scale and weather characteristics of different oil storage tank areas, and adopts the overall cooling, wind resistance, static resistance and snow load resistance design, so that the system is reasonable in structure and attractive in appearance;
(2) The VOCs condensation, recovery, adsorption and purification zero emission system of the flexible buffer tower adopts different dynamic adsorption and condensation recovery combination forms according to the characteristics of VOC organic components in different oil storage tank areas, reduces the operation and main equipment investment scale, and considers the overall carbon emission index;
(3) the flexible buffer tower VOCs condensation recovery adsorption purification 'zero release' system can select corresponding dynamic adsorption process according to the adsorption material, for example:
the granular modified activated carbon adsorption material can selectively adopt a fluidized bed adsorption and desorption regeneration process;
the honeycomb modified activated carbon adsorption material can selectively adopt a box type moving bed adsorption and desorption regeneration process;
the carbon fiber adsorption material can selectively adopt a continuous moving bed adsorption and desorption regeneration process;
the adsorption resin adsorption material can selectively adopt fluidized bed adsorption and desorption regeneration processes;
diesel oil and other types of absorbent can be selected to adopt a multi-layer gradual concentration type washing absorption and desorption regeneration process;
(4) the flexible buffer tower VOCs condensation, recovery, adsorption and purification zero-emission system selects the dynamic adsorption and dynamic washing and absorption processes, has high control precision, can ensure the required amount of adsorption or absorption materials added and replaced at any time period, and ensures that the adsorption materials in the system are in a flowing state of relative motion, thereby ensuring the stability and high efficiency of the whole adsorption efficiency;
(5) The discharge index of the 'zero discharge' system for condensing, recycling, adsorbing and purifying VOCs in the flexible buffer tower can be designed and determined, and the accuracy of the system is ensured through real-time monitoring.
Drawings
FIG. 1 is a schematic diagram of a condensing and recycling unit according to an embodiment of the present invention;
fig. 2 is a schematic front view of a tower structure in a flexible buffer unit according to an embodiment of the present invention;
fig. 3 is a schematic top view of a tower structure in a flexible buffer unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an exemplary module composition of a flexible buffer adsorption purification zero-emission system according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention. It should be further noted that, for convenience of description, only some structures, not all structures, relating to the embodiments of the present invention are shown in the drawings.
This scheme provides a flexible buffering adsorbs purifies zero release system, retrieve unit, flexible buffering unit and oil storage tank district including the condensation, wherein, the unit is retrieved in the condensation is used for retrieving oil storage tank district oil gas, flexible buffering unit is used for right the unit is retrieved in the condensation and remaining gas after retrieving keeps in to carry gas transport to the oil storage tank district when the oil storage tank district carries out the oil storage uninstallation and temperature reduces.
The specific process flow implementation of each unit will now be described in detail.
The condensing recovery unit reduces the temperature of oil gas by mechanical refrigeration by utilizing the difference of vapor partial pressure of hydrocarbon substances at different temperatures, so that the vapor partial pressure of the hydrocarbon substances reaches a saturated state, and the hydrocarbon substances are gradually condensed into liquid state to realize recovery. The condensed oil gas recovery device can be realized by adopting the steps of precooling, mechanical refrigeration, liquid nitrogen refrigeration and the like according to different organic components, and has the characteristics of good safety, high oil gas recovery rate, accordance with the environmental protection requirement, complete equipment assembly, simple installation, automatic operation process, simple and convenient use and maintenance, short investment recovery period and the like. Illustratively, as shown in fig. 1, fig. 1 is a schematic diagram of an operation of a condensation recycling unit according to an embodiment of the present invention.
The precooler is a single-stage cooling device, the operation (condensation) temperature of the precooler is higher than the condensation temperature of various components of oil gas, so that the temperature of the oil gas entering the recovery device is reduced to about 4 ℃ from the ambient temperature, most of water vapor in the oil gas is condensed into water and removed, the volatile gaseous state entering the low-temperature condenser is standardized (consistent), and the operation energy consumption of the recovery device can be reduced. The oil gas leaves the precooler and enters a mechanical refrigeration stage. The mechanical refrigeration stage can condense most of the oil gas into liquid for recovery. If lower cooling temperature is needed, liquid nitrogen refrigeration is needed to be connected after mechanical refrigeration, and the oil gas recovery rate can reach 99%. The working temperature range of the single-stage mechanical refrigerating device is-35-10 ℃, the compression of the serial mechanical refrigerating device consists of a shallow cooling (high temperature) stage and a deep cooling (low temperature) stage, the working temperature of the serial mechanical refrigerating device is-73-40 ℃, and the working temperature of the deep cooling device with liquid nitrogen refrigeration can reach-184 ℃. The greatest advantage of the condensation process is that the recovered hydrocarbon liquid is free of impurities (the hydrocarbon recovered by activated carbon adsorption contains carbon and the hydrocarbon recovered by absorption contains absorbent). The disadvantages are that the higher recovery rate can be achieved only at a very low temperature, and the energy consumption is high. The condensation process is suitable for recovering high-concentration hydrocarbon vapor. Under normal conditions, through the condensing unit, the storage tank size breathes and produces organic steam majority and is retrieved by the condensation, and the gas after the purification is sent to flexible buffer tower, for entire system provides buffer protection and formation circulation, guarantees the realization of "zero release" target.
The flexible buffer unit is an important unit for providing buffer protection and forming circulation for the whole system, thereby ensuring the realization of the 'zero emission' target. Organic waste gas generated in a storage tank area enters an oil gas condensation recovery unit for precooling, mechanical refrigeration and liquid nitrogen refrigeration step by step under normal operation conditions to be condensed into liquid state to realize oil gas recovery, gas which is remained after oil gas recovery and contains low-concentration paint is conveyed to a buffer tower of a flexible buffer unit for temporary storage through a conveying fan by a gas inlet regulating valve, when an oil storage tank is unloaded, the liquid level in the storage tank is reduced to generate negative pressure, at the moment, a flexible buffer unit discharge regulating valve is opened, the gas in the flexible buffer tower enters the oil storage tank to fill the vacuum formed when the liquid level is reduced, a plurality of oil storage tanks in the whole oil storage tank area are linked to form large and small respiration required gas volume with a certain rule, so that the volume of the buffer tower of the flexible buffer unit is designed, the up and down operation (self respiration) rule of the oil product, and the pumping and exhausting regulating valves and all the oil storage tanks regulate parameters, the method is suitable for the breathing rule of the oil storage tanks, and the safe production of the oil storage tanks is ensured. Exemplary, wherein specific schematic diagrams of the tower body structure are shown in fig. 2 and fig. 3, fig. 2 is a schematic front view of the tower body structure in a flexible buffer unit according to an embodiment of the present invention; fig. 3 is a schematic top view of a tower structure in a flexible buffer unit according to an embodiment of the present invention.
The adsorption and desorption regeneration unit can be designed for emergency standby, and is in a standby state under the condition that the condensation unit meets the normal operation of the oil storage tank area; when the production operation conditions of the oil storage tank area are abnormal (production plan mutation, short-time oil storage tank full air is needed, and oil products are stored in a large flow rate), the gas quantity generated by the oil storage tank area exceeds the processing capacity of the whole system or the adsorption and desorption regeneration unit needs to be started, the adsorption and desorption regeneration unit is started, and redundant gas is adsorbed and processed, so that the pollution to the surrounding environment is prevented, and the safety accident is avoided. When the adsorption and adsorption desorption regeneration unit is started, the oil gas air flow to be purified enters through the inlet of the adsorption device, passes through the air flow uniform distribution device, so that the organic waste gas entering the device uniformly and upwards enters each level of adsorption layer, the organic components in the waste gas are adsorbed by the adsorption material layer by layer, the adsorption material at the lowest layer is firstly adsorbed and saturated, the saturation degree is gradually reduced upwards in sequence, the newly-entered adsorption material at the uppermost layer is still fresh, while the concentration of organic matters in the gas adsorbed layer by layer is gradually reduced, the more upward the gas goes, the larger the adsorption power of the adsorption material is, the stronger the adsorption capacity is, therefore, the organic concentration in the gas passing through the last layer of the adsorbing material is ensured to be lower than or far lower than the national or local emission standard, the influence on the surrounding environment is eliminated, and therefore, the emission concentration of the adsorption process can be completely designed and controlled. The gas after adsorption and purification is discharged from the exhaust port of the device and circulates back to the flexible buffer tower, or the gas is ensured to be far lower than the national emission standard and can be discharged safely. The adsorption material with saturated adsorption directly enters a desorption regeneration device, and then desorption regeneration is carried out according to a set program.
The specific structural composition of each unit and the device characteristics will now be described in detail.
The condensation recovery unit is composed of a precooler, mechanical refrigeration, liquid nitrogen refrigeration and other equipment according to different loading varieties of oil storage tanks, wherein the precooler is a single-stage cooling device, the operation (condensation) temperature of the precooler is higher than the condensation temperature of various components of oil gas, so that the temperature of the oil gas entering the recovery device is reduced to about 4 ℃ from the ambient temperature, most of water vapor in the oil gas is condensed into water and removed, the volatile gaseous state entering the low-temperature condenser is standardized, and the operation energy consumption of the recovery device can be reduced. The oil gas leaves the precooler and enters a mechanical refrigeration stage. The mechanical refrigeration stage can condense most of the oil gas into liquid for recovery. If lower cooling temperature is needed, liquid nitrogen refrigeration is needed to be connected after mechanical refrigeration, and the oil gas recovery rate can reach 99%. The working temperature range of the single-stage mechanical refrigerating device is-35-10 ℃, the compression of the serial mechanical refrigerating device consists of a shallow cooling (high temperature) stage and a deep cooling (low temperature) stage, the working temperature of the serial mechanical refrigerating device is-73-40 ℃, and the working temperature of the deep cooling device with liquid nitrogen refrigeration can reach-184 ℃. Meanwhile, for the purpose of condensation recovery, the condensation recovery unit is also provided with corresponding test control instruments and auxiliary components such as linkage regulating valves, pipelines and the like, thereby forming a set of complete system. The condensation recovery unit is arranged at the front end of the whole process and is a main unit for recovering oil gas in the oil storage tank area, and the oil gas steam loss in the oil storage tank in the irrigation area caused by large and small respiration is recovered to the maximum extent through the unit, so that the energy is recovered, and the pollution is reduced. The condensation recovery unit can select the condensation recovery mode of design rather than unanimous and set up condensing temperature according to the oil of the difference of the regional storage of oil tank to guarantee that furthest retrieves corresponding oil steam, have price/performance ratio economic advantages concurrently.
The flexible buffer unit is composed of a round through sharp top type closed foldable and liftable tower body and a windproof bracket which are formed by bonding flexible materials, a flexible tower body lifting device, a spray cooling device, a gas pumping and exhausting fan linked with large and small breaths of a tank body of the tank area, a linked adjusting valve, a monitoring instrument and meter and the like. The tower body can effectively prevent static electricity, is corrosion-resistant and ageing-resistant, has wind resistance and snow load resistance which are adaptive to the climatic characteristics of the area where the tower body is located, and is provided with safety devices such as spraying, cooling and the like. Besides the selection of materials, the flexible buffer unit mainly considers the requirements of firmness, corrosion resistance and buffer function, and also mainly considers the compatibility with the climate characteristics of the location, and the guarantee of safety performance is emphasized.
The adsorption-desorption regeneration unit consists of a box body, an airflow uniform distribution device, a multi-layer dynamic adsorption filter bed, a one-use one-standby desorption regeneration device, an exhaust port, an exhaust fan, an exhaust pipeline and a linkage adjusting valve. The dynamic adsorption device discharges materials from the top, discharges materials from the bottom, and displaces the adsorption materials from top to bottom, so that the adsorption power and the adsorption purification effect are ensured; the device is configured by a standby desorption regeneration device, and a sufficient adjusting room is reserved, so that the safety and the stability of the system operation are ensured; continuous operation can be realized, and the method is suitable for all complex operation conditions; different dynamic adsorption and regeneration forms can be selected, the design is modularized, different dynamic adsorption-desorption regeneration forms which are completely adaptive to specific purification objects are selected according to the specific purification objects, and the optimal result is realized.
Fig. 4 is a schematic diagram of an exemplary module composition of a flexible buffer adsorption purification zero-emission system according to an embodiment of the present invention. As shown in fig. 4, the flexible buffer adsorption purification zero-emission system includes: a tank farm 401, a flexible buffer unit 402, a precooler 403, condensate recovery units 404 and 405, a cryogenic recovery unit 406, a refrigerator 407, an adsorption unit 408, and a desorption unit 409. Wherein, the gas after adsorption and purification of the adsorption device is circularly input into the flexible buffer unit, and can be discharged to reach the standard under special conditions.
It should be noted that, in the embodiment of the flexible buffer adsorption purification zero emission system, the shapes of the units, modules and devices included in the embodiment are only divided according to the functional logic, but are not limited to the division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the embodiment of the present invention.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the embodiments of the invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments can be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.
Claims (3)
1. The system is characterized by comprising a condensation recovery unit, a flexible buffer unit and an oil storage tank area, wherein the condensation recovery unit is used for recovering oil gas in the oil storage tank area, the flexible buffer unit is used for temporarily storing residual gas after the condensation recovery unit recovers, and conveying the gas to the oil storage tank area when the oil storage tank area is subjected to oil storage unloading and temperature reduction, and the system further comprises an adsorption and desorption regeneration unit which comprises a common or standby setting and is in a standby state when the condensation recovery unit meets the condition of normal operation of the oil storage tank area; when the production operation conditions of the oil storage tank area are abnormal or the adsorption and desorption regeneration unit is started, the adsorption and desorption regeneration unit is started to adsorb gas generated by the oil storage tank area and send the gas after adsorption and purification to the flexible buffer unit;
the flexible buffer unit is specifically used for generating negative pressure inside the oil storage tank when the oil storage tank area carries out oil storage unloading and temperature reduction, and opening a linkage adjusting valve of the flexible buffer unit so as to convey gas temporarily stored in the flexible buffer unit to each oil storage tank;
The flexible buffer unit comprises a flexible membrane tower body, a folding flexible membrane, a windproof bracket, a lifting hanger, a lifting pulling mechanism, a lifting slip ring, a spray cooling device, an air pumping and exhausting fan, a linkage adjusting valve and a monitoring instrument;
the flexible membrane tower body is a round-through sharp-top closed foldable lifting device formed by bonding flexible materials, and is linked with a plurality of connected same-quality oil storage tanks through controlling the air suction and exhaust fan and the linkage adjusting valve;
the adsorption and desorption regeneration unit comprises a box body, a multilayer dynamic adsorption filter bed, an air flow uniform distribution device, a standby desorption regeneration device and an air exhaust port, an air exhauster, an air exhaust pipeline and a linkage adjusting valve, when the adsorption and desorption regeneration unit is started, the oil gas air flow to be purified flows through a gas inlet in the adsorption and desorption regeneration unit, the air flow uniform distribution device enables the entering oil gas air flow to uniformly and upwards enter adsorption layers at different levels, the multilayer dynamic adsorption filter bed adsorbs layer by layer, and the gas after adsorption is circularly conveyed to the flexible buffer unit.
2. The flexible buffer adsorption purification zero-emission system according to claim 1, wherein the condensation recovery unit comprises a precooler, a mechanical refrigeration unit or/and a liquid nitrogen refrigeration unit.
3. The method for zero emission of flexible buffer adsorption purification is characterized by comprising the following steps:
the oil gas recovery device comprises a condensation recovery unit, an oil storage tank area and a control unit, wherein the condensation recovery unit recovers oil gas in the oil storage tank area, the oil storage tank area comprises a plurality of connected oil storage tanks with the same quality, and each oil storage tank is controlled to be in a linkage state;
the flexible buffer unit temporarily stores the residual gas after the condensation recovery unit recovers, when the oil storage tank area is subjected to oil storage unloading and the air temperature is reduced, negative pressure is generated inside the oil storage tank, and a linkage adjusting valve of the flexible buffer unit is opened, so that the gas temporarily stored in the flexible buffer unit is conveyed to each oil storage tank;
the adsorption desorption regeneration unit is in a standby state under the condition that the condensation recovery unit meets the normal operation of an oil storage tank area; when the production operation conditions of the oil storage tank area are abnormal or the adsorption and desorption regeneration unit is opened, the adsorption and desorption regeneration unit is started to adsorb the gas generated in the oil storage tank area and sends the gas after adsorption and purification to the flexible buffer unit, the adsorption and desorption regeneration unit comprises a box body, a plurality of layers of dynamic adsorption filter beds, a gas flow uniform distribution device, a one-use one-standby desorption regeneration device, an exhaust port, an exhaust fan, an exhaust pipeline and a linkage adjusting valve, when the adsorption and desorption regeneration unit is started, the oil gas flow to be purified enters through a gas inlet in the adsorption and desorption regeneration unit, the entering oil gas flow uniformly upwards enters into each level of adsorption layer through the gas flow uniform distribution device, the oil gas flow is adsorbed layer by layer through the plurality of layers of dynamic adsorption filter beds, and the adsorbed gas is circularly conveyed to the flexible buffer unit;
Flexible buffer unit includes flexible membrane tower body, folding flexible membrane, prevent wind support, lift gallows, lift and carry and draw mechanism, lift sliding ring, mist cooling device, pump drainage fan, linkage adjusting valve and monitoring instrument, the device of the inclosed collapsible lift of circle logical pinnacle type that the flexible membrane tower body is formed by binding by flexible material, through right pump drainage fan and linkage adjusting valve's control realizes breathing the linkage adjusting valve linkage with the quality oil storage tank size that a plurality of link to each other.
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Denomination of invention: Flexible buffer adsorption purification zero emission system and method Granted publication date: 20220628 Pledgee: Guangdong Development Bank Limited by Share Ltd. Guangzhou branch Pledgor: GUANGZHOU JP.EPE Co.,Ltd. Registration number: Y2024440000001 |