CN111846675A - Oil gas volatilization inhibition system and method with inert gas protection function - Google Patents
Oil gas volatilization inhibition system and method with inert gas protection function Download PDFInfo
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- CN111846675A CN111846675A CN202010809331.5A CN202010809331A CN111846675A CN 111846675 A CN111846675 A CN 111846675A CN 202010809331 A CN202010809331 A CN 202010809331A CN 111846675 A CN111846675 A CN 111846675A
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- 239000007789 gas Substances 0.000 title claims abstract description 202
- 239000011261 inert gas Substances 0.000 title claims abstract description 68
- 230000005764 inhibitory process Effects 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 229
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 67
- 230000001629 suppression Effects 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000002430 hydrocarbons Chemical class 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 13
- 239000013589 supplement Substances 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 65
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 6
- 238000004134 energy conservation Methods 0.000 description 5
- 239000000341 volatile oil Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 208000004756 Respiratory Insufficiency Diseases 0.000 description 1
- 206010038678 Respiratory depression Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/30—Recovery of escaped vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/38—Means for reducing the vapour space or for reducing the formation of vapour within containers
- B65D90/44—Means for reducing the vapour space or for reducing the formation of vapour within containers by use of inert gas for filling space above liquid or between contents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention belongs to the technical field of oil product storage tank safety and environmental protection, and discloses an oil gas volatilization inhibition system with an inert gas protection function, which is applied to a storage tank for storing oil products and comprises the following components: the buffer tank is provided with an air outlet and an air inlet communicated with at least one storage tank and is used for receiving redundant gas in the tank when the air pressure in the storage tank is too high; the first gas storage tank is provided with a gas outlet and a gas inlet communicated with the gas outlet of the buffer tank, and is used for discharging gas in the first gas storage tank into the storage tank through the gas outlet when the air pressure in the storage tank is too low; a first compressor; the invention also discloses an oil gas volatilization inhibition method with the inert gas protection function. The invention can utilize the original oil gas in the tank to quickly supplement and adjust when the pressure at the top of the tank is unbalanced, so that the tank is balanced again, the breathing action of the breather valve can be prevented, the purposes of energy saving and emission reduction are achieved, and the tank can be subjected to inertia protection.
Description
Technical Field
The invention belongs to the technical field of oil product storage tank safety and environmental protection, and particularly relates to an oil gas volatilization inhibition system with an inert gas protection function and an oil gas volatilization inhibition method with the inert gas protection function.
Background
At present, when an oil product is filled in the vault tank, the space in the tank body can be reduced along with the increase of the oil product, the rapid rise of the pressure leads to the direct emptying of the big breather valve, at the moment, the gas in the tank is mostly oil gas with higher concentration, the air is seriously polluted after the gas is discharged, and the oil mist formed by the discharge of the oil gas with high concentration has huge potential safety hazard and easily causes fire. When the vault jar unloads oil, negative pressure forms in the jar, and the breather valve probably moves and inhales the air and causes the interior oxygen content of jar to exceed standard and form the potential safety hazard. Almost all current oil dome tanks balance gas in the tank body through the breather valve, and are not economical, environment-friendly and safe.
Disclosure of Invention
The invention aims to provide an oil gas volatilization inhibition system and method with an inert gas protection function, which can utilize the original oil gas in a tank to quickly supplement and adjust when the pressure at the top of the tank is unbalanced, so that the oil gas is balanced again, can prevent the breathing action of a breather valve, achieves the purposes of energy conservation and emission reduction, and can perform inert protection on a storage tank.
The technical scheme adopted by the invention is as follows:
in one aspect, the present invention provides an oil gas volatilization inhibition system with an inert gas protection function, which is applied to a storage tank for storing oil products, and comprises:
the buffer tank is provided with an air outlet and an air inlet communicated with at least one storage tank and is used for receiving redundant gas in the tank when the air pressure in the storage tank is too high;
the first gas storage tank is provided with a gas outlet and a gas inlet communicated with the gas outlet of the buffer tank, and is used for discharging gas in the first gas storage tank into the storage tank through the gas outlet when the air pressure in the storage tank is too low;
the first compressor is connected between the air outlet of the buffer tank and the air inlet of the first air storage tank and is used for compressing the gas entering the first air storage tank;
and the inert gas protection device is provided with an inert gas output end and is communicated with the storage tank through the inert gas output end, and is used for injecting inert gas into the storage tank when the oxygen content in the storage tank is too high and/or injecting inert gas into the storage tank when the gas pressure discharged into the storage tank by the first storage tank is insufficient.
In the preferred technical scheme, every the top of storage tank all is equipped with the blow vent, the blow vent is connected with the three-way valve, a link of three-way valve respectively with the air inlet of buffer tank with the gas outlet intercommunication of first gas holder, another link of three-way valve is connected with the breather valve.
In a preferred technical scheme, the three-way valve of each storage tank is simultaneously connected with a main pipe through a first branch pipe, and one end of the main pipe, which is far away from the three-way valve, is respectively connected with the air inlet of the buffer tank and the air outlet of the first air storage tank through a second branch pipe; the second branch pipes are provided with first electromagnetic valves; and a second branch pipe connected with the first gas storage tank is communicated with the inert gas output end, and a tenth electromagnetic valve is arranged between the inert gas output end and the second branch pipe.
In a preferred technical scheme, the device further comprises a control system; the storage tank is provided with a first pressure detector for detecting the internal air pressure of the storage tank, and the first electromagnetic valve, the first compressor and the pressure detector are respectively electrically connected with the control system.
In a preferable technical scheme, the first air storage tank and the buffer tank are respectively provided with a second pressure detector and a third pressure detector which are used for detecting the internal pressure of the buffer tank, a second electromagnetic valve is arranged between an air outlet of the buffer tank and the first compressor, and the second electromagnetic valve, the second pressure detector and the third pressure detector are respectively electrically connected with the control system.
In a preferred technical scheme, the first gas storage tank is provided with a first liquid level sensor for detecting the liquid level of oil in the first gas storage tank, the first gas storage tank is provided with a liquid outlet, the liquid outlet is connected with a liquid discharge pipe, and the liquid discharge pipe is provided with a third electromagnetic valve; and the third electromagnetic valve and the first liquid level sensor are respectively electrically connected with the control system.
In a preferred technical scheme, a supplement pipeline is further connected between the first gas storage tank and the buffer tank, and a fourth electromagnetic valve electrically connected with the control system is arranged on the supplement pipeline.
In a preferable technical scheme, a second compressor connected with the first compressor in parallel is further arranged between the air outlet of the buffer tank and the air inlet of the first air storage tank.
In a preferable technical scheme, the device further comprises a tail gas treatment device, and the gas inlet end of the tail gas treatment device is communicated with the waste gas outlet of the first gas storage tank through an eighth electromagnetic valve.
In a preferred technical scheme, a second air storage tank is further arranged between the first compressor and the first air storage tank, an air inlet of the second air storage tank is communicated with an output end of the first compressor, and an air outlet of the second air storage tank is communicated with an air inlet of the first air storage tank; a fifth electromagnetic valve is arranged in front of the air inlet of the second air storage tank and the air inlet of the first air storage tank; and the second gas storage tank is connected with a liquid collecting device.
In a preferred technical scheme, the liquid collecting device comprises a liquid collecting tank; the second gas storage tank is provided with a second liquid level sensor for detecting the liquid level of oil in the second gas storage tank; the bottom and the side part of the second air storage tank are respectively provided with a first liquid discharge port and a second liquid discharge port, the first liquid discharge port and the second liquid discharge port are respectively connected with a liquid inlet of a liquid collecting tank through liquid collecting pipes, the liquid discharge port of the liquid collecting tank is connected with a liquid discharge pipe, and a sixth electromagnetic valve is arranged on the liquid discharge pipe; the liquid collecting pipe is provided with a seventh electromagnetic valve.
In another aspect, the present invention also provides a method for suppressing volatilization of oil gas with inert gas protection function, comprising the following steps:
s1: when the pressure value of each storage tank exceeds the upper limit set value, starting a first compressor, opening a first electromagnetic valve and a second electromagnetic valve for controlling the air inlet of the buffer tank, and sucking the volatile oil gas in each storage tank into the buffer tank which is pumped into negative pressure by the first compressor;
s2: the oil gas in the buffer tank is pumped out by a compressor for compression, and the compressed oil gas is sent into a first gas storage tank for storage; when the gas in the first gas storage tank reaches the upper storage limit, the eighth electromagnetic valve is opened, and the tail gas treatment device receives the redundant oil gas of the first gas storage tank and carries out tail gas treatment;
s3: after the pressure value of each storage tank is lower than the upper limit set value, the first compressor, the first electromagnetic valve and the second electromagnetic valve are related;
s4: when the pressure value of each storage tank is lower than the lower limit set value, a first electromagnetic valve for controlling the first gas storage tank to store gas is opened, and the first gas storage tank conveys oil gas stored in the first gas storage tank to each storage tank; when the pressure of the gas discharged from the first gas storage tank to the storage tank is insufficient, the tenth electromagnetic valve is opened, and the inert gas protection device injects inert gas into the storage tank.
S5: and after the pressure value of each storage tank is higher than the lower limit set value, closing a first electromagnetic valve for controlling the gas storage of the first gas storage tank.
S6: and when the oxygen content in the storage tank is higher than a set value, opening the tenth electromagnetic valve, and injecting inert gas into the storage tank by the inert gas protection device.
The invention has the beneficial effects that:
(1) the invention can monitor the pressure in each vault, and when the pressure is higher than the upper limit set value, the volatile gas in the vault is extracted, compressed and collected, so that the opening of the breather valve is inhibited, the direct discharge of oil gas is effectively reduced, and the discharge of large-content oil gas and the complicated treatment of oil gas discharge are avoided.
(2) When the pressure of the top of the vault tank is lower than the lower limit set value, the gas storage tank can supplement each storage tank to maintain the gas pressure balance, so that the opening of the breather valve is inhibited, and the problem of oxygen increase in the tank due to the opening of the breather valve is avoided; and because the gas that supplements is the oil gas that has undergone the compression, when the volatile oil gas concentration of storage tank keeps a concentration range value, can restrain new oil product volatile gas, when volatilizing to reduce after, can bring direct economic benefits.
(3) Through add the three-way valve at vault tank deck portion, can form atmospheric pressure balance each other after each vault jar parallel connection, realize the mutual balance in certain atmospheric pressure scope, and then reduced respiratory inhibition system's the number of times of opening to practice thrift energy resource consumption, it is more energy-concerving and environment-protective.
(4) The tail gas treatment is carried out on the oil gas exceeding the capacity, the gas with large discharge capacity of the vault tank is collected through compression, the rest gas with excessive capacity needs to be discharged into a tail gas treatment device for secondary treatment, the volatilization treatment of the redundant oil gas in the vault tank area can be completed with lower power consumption, and the purpose of energy conservation is achieved.
(5) And monitoring the oxygen content of the main pipe at the top of the vault tank in real time, and starting an inerting protection system to inject inert gas for safety protection when the oxygen content exceeds a set value.
(6) The control system can carry out automatic control, and the action of the corresponding valve is controlled automatically according to the pressure conditions of the arch top tank, the buffer tank and the gas storage tank, so that the suppression process of the breathing valve of the arch top tank is realized, and the control is more accurate and safer.
Drawings
FIG. 1 is a schematic diagram of the connection principle of an embodiment of the present invention;
fig. 2 is a schematic diagram of the connection principle of another embodiment of the present invention.
In the figure: 1-a breather valve; 2-three-way valve; 3-an oxygen detector; 4-a flow sensor; 5-ninth solenoid valve; 6-a first needle valve; 7-a first compressor; 8-a second needle valve; 9-a first solenoid valve; 10-a third pressure detector; 11-a buffer tank; 12-a third needle valve; 13-a second solenoid valve; 14-a third needle valve; 15-a second compressor; 16-a fourth solenoid valve; 17-an eighth solenoid valve; 18-a second pressure detector; 19-a first gas reservoir; 20-a first level sensor; 21-drain pipe; 22-a third solenoid valve; 23-inert gas protection; 24-a control system; 25-tenth solenoid valve; 26-a tail gas treatment device; 27-a second air reservoir; 28-seventh solenoid valve; 29-a sixth solenoid valve; 30-liquid collection tank.
In fig. 1 and 2, the solid lines represent connecting line lines, and the broken lines represent control lines.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. For those skilled in the art, the drawings of the above-mentioned terms in the embodiments of the present invention can be understood in specific situations, and the technical solutions in the embodiments of the present invention are clearly and completely described. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
The invention is further described with reference to the following figures and specific embodiments.
Referring to fig. 1 and 2, an oil gas volatilization suppression system with inert gas protection function is applied to a storage tank for storing oil products, and comprises: a buffer tank 11, a first gas storage tank 19, a first compressor 7 and an inert gas protection device 23. The inhibition system can be used for other storage tanks for storing oil products, and is not limited to the vault tank.
The buffer tank 11 is provided with an air outlet and an air inlet communicated with at least one storage tank, and the buffer tank 11 is used for receiving redundant gas in the tank when the air pressure in the storage tank is too high; the buffer tank 11 is mainly used for temporarily storing oil gas before the oil gas enters the first gas storage tank 19, so that the buffer tank plays a role of buffering, and negative pressure is formed in the buffer tank during operation, so that redundant oil gas from each storage tank can be better received. When the gas pressure of the oil gas exceeds the upper limit set value, the buffer tank 11 is communicated with the storage tank and receives redundant oil gas, the gas pressure in the storage tank is kept balanced, and the receiving is stopped after the gas pressure is lower than the upper limit set value.
The first air storage tank 19 is provided with an air outlet and an air inlet communicated with the air outlet of the buffer tank 11, and the first air storage tank 19 is used for discharging the gas in the first air storage tank 19 into the storage tank through the air outlet when the air pressure in the storage tank is too low; and the first gas storage tank 19 is used for delivering the gas stored in the storage tank when the gas pressure in the storage tank is too low while playing a role of storing oil gas, so that the pressure in the storage tank is balanced, and the delivery is stopped when the pressure is lower than a lower limit set value. The first reservoir 19 is in a positive pressure state both during operation and during storage.
And the first compressor 7 is connected between the air outlet of the buffer tank 11 and the air inlet of the first air storage tank 19 and is used for compressing the air entering the first air storage tank 19. First compressor 7 can be taken out buffer tank 11 into the negative pressure, so that 11 better oil gas of receiving the storage tank of buffer tank, simultaneously it can compress the oil gas that gets into first gas holder 19, make and to store more oil gas in the first gas holder 19, and also make the gas that first gas holder 19 was arranged to the storage tank pass through the compression, its concentration is higher, the oil gas that oil newly volatilizees in the storage tank back also can reduce with it, the requirement of environmental protection has been satisfied, economic benefits has been improved.
And the inert gas protection device 23 is provided with an inert gas output end and is communicated with the storage tank through the inert gas output end, and is used for injecting inert gas into the storage tank when the oxygen content in the storage tank is too high and/or injecting inert gas into the storage tank when the gas pressure discharged into the storage tank by the first storage tank 19 is insufficient. The inert gas shielding device 23 is preferably used in both cases during implementation, although not limited thereto. Inert gas such as nitrogen can be injected into the storage tank through the inert gas protection device 23, so that the storage tank is safer and avoids explosion and combustion. The inert gas protection device 23 may be an existing nitrogen production device or other inert gas production device, or may be a plant area capable of providing nitrogen or other inert gas, without limitation.
The suppression system can utilize the original oil gas in the tank to supplement and adjust rapidly when the pressure at the top of the tank is unbalanced, so that the original oil gas is balanced again to prevent the breathing action of the breather valve 1, and the purposes of energy conservation and emission reduction are achieved. Meanwhile, the storage tank can be connected with the suppression system without the breather valve 1, the pressure balance of each storage tank is maintained through the suppression system, and meanwhile, the storage tank can be effectively protected safely through the inert gas protection device 23.
In a preferred embodiment of the present invention, as shown in fig. 1, a vent is provided at the top of each storage tank, a three-way valve 2 is connected to the vent, one connection end of the three-way valve 2 is respectively communicated with the air inlet of the buffer tank 11 and the air outlet of the first air storage tank 19, and the other connection end of the three-way valve 2 is connected to a breather valve 1. Through add three-way valve 2 between breather valve 1 and storage tank vent, this suppression system's of both having been convenient for access has also remained original breather valve 1's setting, and breather valve 1 can realize dual atmospheric pressure balanced maintenance with this suppression system, and is safer, environmental protection.
In a preferred embodiment of the present invention, as shown in fig. 1, the three-way valve 2 of each storage tank is simultaneously connected with a main pipe through a first branch pipe, and one end of the main pipe, which is far away from the three-way valve 2, is respectively connected with the air inlet of the buffer tank 11 and the air outlet of the first storage tank 19 through a second branch pipe; the second branch pipes are provided with first electromagnetic valves 9; and a second branch pipe connected with the first gas storage tank is communicated with the inert gas output end, and a tenth solenoid valve 25 is arranged between the inert gas output end and the second branch pipe. Each storage tank is communicated with each other through the first branch pipe and the main pipe, when the first electromagnetic valve 9 on the second branch pipe is not opened, the pressure balance among the storage tanks can be achieved, the mutual balance in a certain air pressure range is realized, the opening times of the respiratory depression system are reduced, the energy consumption is saved, and the energy-saving and environment-friendly effects are achieved. The first solenoid valves 9 on the two second branch pipes control the intake of the buffer tank 11 and the exhaust of the first air tank 19. The inert gas output end of the inert gas protection device 23 is connected with the second branch pipe, so that the inert gas can be injected into the storage tank through the discharge pipeline of the first gas storage tank 12, the inert gas can be injected into the storage tank when the oxygen content in the storage tank is too high, and the gas can be injected into the storage tank respectively when the first gas storage tank 19 is discharged into the storage tank under the condition of insufficient gas pressure, so that the inert gas protection device is more practical and convenient. Simultaneously, through the setting of first lateral conduit, house steward and second lateral conduit, the public pipeline of the discharge of the storage tank volatile oil gas and the input of oil gas, pipeline design is more reasonable, has reduced the use of tubular material, the cost is reduced.
Of course, it is also possible to provide the second branch line directly in communication with the input of the first compression and before both, a ninth solenoid valve 5, so that the oil and gas discharged from the storage tank is directly passed through the first compressor 7 into the first gas tank 19, for the requirements in case of maintenance of the buffer tank 11, etc.
As shown in FIG. 1, in a preferred embodiment of the present invention, a control system 24 is also included; the storage tank is provided with a first pressure detector for detecting the internal air pressure of the storage tank, and the first electromagnetic valve 9, the first compressor 7 and the pressure detector are respectively and electrically connected with the control system 24. The first pressure detector is used for detecting the air pressure in the top of the storage tank and feeding the detected pressure information back to the control system 24, and the control system 24 controls the opening and closing of the first electromagnetic valve 9 according to preset upper and lower limit set values to complete air inlet balance and air delivery balance of the storage tank and realize automatic balance of the air pressure of the storage tank. The first pressure detector may be a pressure sensor, or may be a pressure detector, and is not limited. The control system 24 includes a programmable logic controller or an industrial personal computer and a signal acquisition module, and the control logic implemented by the system is as follows: a signal acquisition module is used for respectively acquiring signals such as a vault tank top pressure signal, a buffer tank 11 pressure signal and a first gas storage tank 19 pressure signal, and judging the signals according to set values, so that different treatment measures are performed on the gas pressure change at the top of the vault tank during oil product loading and unloading. The second branch pipe is also provided with a flow sensor 4 electrically connected to the control system 24, and the flow sensor 4 collects flow information.
As shown in fig. 1, in a preferred embodiment of the present invention, the first air tank 19 and the buffer tank 11 are respectively provided with a second pressure detector 18 and a third pressure detector 10 for detecting the internal pressure, a second solenoid valve 13 is provided between the air outlet of the buffer tank 11 and the first compressor 7, and the second solenoid valve 13, the second pressure detector 18 and the third pressure detector 10 are respectively electrically connected to the control system 24. The second pressure detector 18 is used for detecting the air pressure in the first air storage tank 19, and the second pressure detector 18 is used for detecting the air pressure in the buffer tank 11, so that the control system 24 is favorable for balancing according to the pressures of the buffer tank 11 and the first air storage tank 19, and automatically adjusting the processing air quantity of the first compressor 7. Specifically, the input end and the output end of the first compressor 7 are respectively provided with a first needle valve 6 and a second needle valve 8, and the processing air volume of the first compressor 7 is adjusted through the two needle valves, so that the buffer tank 11 and the first air storage tank 19 can be pressure balanced.
As shown in fig. 1, in a preferred embodiment of the present invention, the first air storage tank 19 is provided with a first level sensor 20 for detecting the level of oil therein, the first air storage tank 19 is provided with a liquid discharge port, the liquid discharge port is connected with a liquid discharge pipe 21, and the liquid discharge pipe 21 is provided with a third electromagnetic valve 22; the third solenoid valve 22 and the first liquid level sensor 20 are electrically connected to the control system 24, respectively. The liquid level sensor is used for detecting the oil liquid level in the first air storage tank 19, the control system 24 judges according to the collected liquid level signal, and when the oil liquid level reaches a set value, the third electromagnetic valve 22 is opened to discharge liquid so as to avoid the accumulation of oil liquid.
As shown in fig. 1, in a preferred embodiment of the present invention, a supplementary pipeline is further connected between the first air tank 19 and the buffer tank 11, and the supplementary pipeline is provided with a fourth electromagnetic valve 16 electrically connected to the control system 24. When first buffer tank 11 reaches the storage upper limit, the accessible opens fourth solenoid valve 16 and makes first gas holder 19 and buffer tank 11 communicate, and the too much gas of first gas holder 19 then gets into buffer tank 11 and carries out temporary storage to through the processing gas volume restriction buffer tank 11 of adjusting first compressor 7 in the oil gas gets into first gas holder 19, realize the balanced regulation of atmospheric pressure.
As shown in fig. 1, in a preferred embodiment of the present invention, the exhaust gas treatment device 26 is further included, and an air inlet end of the exhaust gas treatment device 26 is communicated with an exhaust gas outlet of the first air tank 19 through an eighth solenoid valve 17. When the second pressure detector 18 detects that the pressure value in the first gas storage tank 19 exceeds the upper limit pressure set value, the eighth electromagnetic valve is opened, redundant oil gas in the first gas storage tank 19 is discharged into the tail gas treatment device for secondary treatment, the redundant oil gas volatilization treatment in the tank storage area can be completed with lower power consumption, and the purpose of energy conservation is achieved. The tail gas treatment device 26 may be an existing waste gas combustion treatment device, an existing cryogenic treatment device, or an existing gas power generation device to treat and reuse tail gas, so as to achieve the purposes of energy conservation and environmental protection. In practice, the exhaust gas treatment device 26 is preferably an existing gas power generation device or system, through which the exhaust gas is combusted, and the generated electricity can be used for supplying power to the oil and gas suppression system, as a standby power supply, or as a combined power supply, for example, for supplying power to the first compressor or other electrical appliances.
In a preferred embodiment of the present invention, as shown in fig. 1, a second compressor 15 connected in parallel with the first compressor 7 is further disposed between the air outlet of the buffer tank 11 and the air inlet of the first air storage tank 19. The second compressor 15 is used as a backup compressor, and is operated by the first compressor 7 in a normal operation, and the second compressor 15 is used in a case where the first compressor 7 is damaged or the like. Specifically, the input end and the output end of the second compressor 15 are respectively provided with a third needle valve 12 and a third needle valve 12 for regulating the flow rate.
As shown in fig. 2, in a preferred embodiment of the present invention, a second air tank 27 is further disposed between the first compressor 7 and the first air tank 19, an air inlet of the second air tank 27 is communicated with an output end of the first compressor 7, and an air outlet of the second air tank 27 is communicated with an air inlet of the first air tank 19; a fifth electromagnetic valve is arranged in front of the air inlet of the second air storage tank 27 and the air inlet of the first air storage tank 19; the second air storage tank 27 is connected with a liquid collecting device. In this embodiment, the second air tank 27 is the main air tank, and the buffer tank 11 and the first air tank 19 both mainly perform the buffering function. The second is connected with a liquid distribution pipeline. The volumes of the buffer tank 11 and the first air tank 19 are preferably 1m3The volume of the second air tank 27 is preferably 50m3. The embodiment is suitable for the storage tank with larger volatile oil gas amount.
In a preferred embodiment of the present invention, as shown in fig. 2, the liquid trap includes a liquid trap tank 30; the second air storage tank 27 is provided with a second liquid level sensor for detecting the liquid level of oil in the second air storage tank; the bottom and the side part of the second air storage tank 27 are respectively provided with a first liquid discharge port and a second liquid discharge port, the first liquid discharge port and the second liquid discharge port are respectively connected with a liquid inlet of a liquid collecting tank 30 through liquid collecting pipes, the liquid discharge port of the liquid collecting tank 30 is connected with a liquid discharge pipe 21, and the liquid discharge pipe 21 is provided with a sixth electromagnetic valve 29; the collector tube is provided with a seventh solenoid valve 28. When the second liquid level sensor detects that the liquid level of the oil in the second air storage tank 27 exceeds the upper limit set value, the two seventh electromagnetic valves 28 are simultaneously opened, so that the second air storage tank 27 discharges the liquid into the liquid collecting pipe, the liquid discharging efficiency is higher, and the oil in the liquid collecting tank 30 is discharged out of the pipe for treatment after the sixth electromagnetic valve 29 is opened.
Referring to fig. 1 and 2, a method for suppressing volatilization of oil and gas with inert gas protection function includes the following steps:
s1: when the pressure value of the storage tank exceeds the upper limit set value, starting the first compressor 7, opening the first electromagnetic valve 9 and the second electromagnetic valve 13 for controlling the air inlet of the buffer tank 11, and sucking the volatile oil gas in each storage tank into the buffer tank 11 which is pumped into negative pressure by the first compressor 7;
s2: oil gas in the buffer tank 11 is pumped out by a compressor for compression, and the compressed oil gas is sent into a first gas storage tank 19 for storage; when the gas in the first gas storage tank 19 reaches the upper storage limit, the eighth electromagnetic valve 17 is opened, and the tail gas treatment device 26 receives the redundant oil gas in the first gas storage tank 19 and carries out tail gas treatment;
s3: after the pressure value of each storage tank is lower than the upper limit set value, the first compressor 7, the first electromagnetic valve 9 and the second electromagnetic valve 13 are connected;
s4: when the pressure value of each storage tank is lower than the lower limit set value, a first electromagnetic valve 9 for controlling the first air storage tank 19 to store air is opened, and the first air storage tank 19 conveys oil gas stored in the first air storage tank to each storage tank; when the pressure of the gas discharged from the first gas tank 19 to the storage tank is insufficient, the tenth solenoid valve 25 is opened, and the inert gas protection device 23 injects the inert gas into the storage tank.
S5: and after the pressure value of each storage tank is higher than the lower limit set value, closing the first electromagnetic valve 9 for controlling the first air storage tank 19 to store air.
S6: when the oxygen content in the storage tank is higher than the set value, the tenth electromagnetic valve 25 is opened, and the inert gas protection device 23 injects inert gas into the storage tank.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
1. The utility model provides an oil gas volatilization suppression system with inert gas protect function, is applied to the storage tank of storage oil, its characterized in that includes:
the buffer tank (11) is provided with an air outlet and an air inlet communicated with at least one storage tank, and the buffer tank (11) is used for receiving redundant gas in the tank when the air pressure in the storage tank is too high;
the first air storage tank (19) is provided with an air outlet and an air inlet communicated with the air outlet of the buffer tank (11), and the first air storage tank (19) is used for discharging gas in the first air storage tank (19) into the storage tank through the air outlet when the air pressure in the storage tank is too low;
the first compressor (7) is connected between the air outlet of the buffer tank (11) and the air inlet of the first air storage tank (19) and is used for compressing the air entering the first air storage tank (19); and
and the inert gas protection device (23) is provided with an inert gas output end and is communicated with the storage tank through the inert gas output end, and is used for injecting inert gas into the storage tank when the oxygen content in the storage tank is too high and/or injecting the inert gas into the storage tank when the gas pressure discharged into the storage tank by the first storage tank (19) is insufficient.
2. The system for suppressing oil and gas volatilization with inert gas protection function according to claim 1, characterized in that a vent is arranged at the top of each storage tank, a three-way valve (2) is connected to the vent, one connection end of the three-way valve (2) is respectively communicated with the gas inlet of the buffer tank (11) and the gas outlet of the first gas storage tank (19), and the other connection end of the three-way valve (2) is connected with a breather valve (1).
3. An oil gas volatilization suppression system with inert gas protection function according to claim 2, characterized in that the three-way valve (2) of each storage tank is simultaneously connected with a main pipe through a first branch pipe, and one end of the main pipe, which is far away from the three-way valve (2), is respectively connected with the gas inlet of the buffer tank (11) and the gas outlet of the first gas storage tank (19) through a second branch pipe; the second branch pipes are provided with first electromagnetic valves (9); and a second branch pipe connected with the first gas storage tank is communicated with the inert gas output end, and a tenth solenoid valve (25) is arranged between the inert gas output end and the second branch pipe.
4. The system for suppressing hydrocarbon volatilization with inert gas shielding function according to claim 3, further comprising a control system (24); the storage tank is provided with a first pressure detector for detecting the internal air pressure of the storage tank, and the first electromagnetic valve (9), the first compressor (7) and the pressure detector are respectively electrically connected with the control system (24).
5. The oil gas volatilization suppression system with inert gas protection function according to claim 4, wherein the first gas storage tank (19) and the buffer tank (11) are respectively provided with a second pressure detector (18) and a third pressure detector (10) for detecting the internal pressure, a second electromagnetic valve (13) is arranged between the gas outlet of the buffer tank (11) and the compressor, and the second electromagnetic valve (13), the second pressure sensor and the third pressure detector (10) are respectively electrically connected with the control system (24).
6. The system for suppressing oil and gas volatilization with the inert gas protection function according to claim 4, wherein the first air storage tank (19) is provided with a first liquid level sensor (20) for detecting the liquid level of oil in the first air storage tank, the first air storage tank (19) is provided with a liquid outlet, the liquid outlet is connected with a liquid outlet pipe (21), and a third electromagnetic valve (22) is arranged on the liquid outlet pipe (21); the third electromagnetic valve (22) and the first liquid level sensor (20) are respectively electrically connected with the control system (24).
7. The oil gas volatilization suppression system with inert gas protection function according to claim 4, wherein a supplementary pipeline is further connected between the first gas storage tank (19) and the buffer tank (11), and a fourth solenoid valve (16) electrically connected with the control system (24) is arranged on the supplementary pipeline.
8. The oil and gas volatilization suppression system with inert gas protection function according to claim 1, further comprising a tail gas treatment device (26), wherein the gas inlet end of the tail gas treatment device (26) is communicated with the exhaust gas outlet of the first gas storage tank (19) through an eighth solenoid valve (17).
9. The oil gas volatilization suppression system with inert gas protection function according to claim 1, wherein a second air storage tank (27) is further arranged between the first compressor (7) and the first air storage tank (19), an air inlet of the second air storage tank (27) is communicated with an output end of the first compressor (7), and an air outlet of the second air storage tank (27) is communicated with an air inlet of the first air storage tank (19); a fifth electromagnetic valve is arranged in front of the air inlet of the second air storage tank (27) and the air inlet of the first air storage tank (19); the second air storage tank (27) is connected with a liquid collecting device.
10. An oil gas volatilization inhibition method is characterized in that: the method comprises the following steps:
s1: when the pressure value of each storage tank exceeds the upper limit set value, starting a first compressor (7), opening a first electromagnetic valve (9) and a second electromagnetic valve (13) for controlling the air inlet of a buffer tank (11), and sucking the oil gas volatilized in each storage tank by the buffer tank (11) which is pumped into negative pressure by the first compressor (7);
s2: oil gas in the buffer tank (11) is pumped out by a compressor for compression, and the compressed oil gas is sent into a first gas storage tank (19) for storage; when the gas in the first gas storage tank (19) reaches the upper storage limit, the eighth electromagnetic valve (17) is opened, and the tail gas treatment device (26) is used for receiving redundant oil gas in the first gas storage tank (19) and carrying out tail gas treatment;
s3: after the pressure value of each storage tank is lower than the upper limit set value, the first compressor (7), the first electromagnetic valve (9) and the second electromagnetic valve (13) are connected;
s4: when the pressure value of each storage tank is lower than the lower limit set value, a first electromagnetic valve (9) for controlling the first air storage tank (19) to store air is opened, and the first air storage tank (19) conveys oil gas stored in the first air storage tank to each storage tank; when the pressure of the gas discharged from the first gas tank (19) to the storage tank is insufficient, the tenth solenoid valve (25) is opened, and the inert gas protection device (23) injects inert gas into the storage tank.
S5: and after the pressure value of each storage tank is higher than the lower limit set value, closing a first electromagnetic valve (9) for controlling the first air storage tank (19) to store air.
S6: when the oxygen content in the storage tank is higher than a set value, a tenth electromagnetic valve (25) is opened, and the inert gas protection device (23) injects inert gas into the storage tank.
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| CN202010809331.5A CN111846675A (en) | 2020-08-12 | 2020-08-12 | Oil gas volatilization inhibition system and method with inert gas protection function |
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| CN114313674A (en) * | 2021-12-28 | 2022-04-12 | 威特龙消防安全集团股份公司 | Internal circulation inerting protection system and method for normal-pressure storage tank |
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