CN113188038A - Liquefied hydrocarbon storage tank replacement gas recovery device and method and application thereof - Google Patents
Liquefied hydrocarbon storage tank replacement gas recovery device and method and application thereof Download PDFInfo
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- CN113188038A CN113188038A CN202110583468.8A CN202110583468A CN113188038A CN 113188038 A CN113188038 A CN 113188038A CN 202110583468 A CN202110583468 A CN 202110583468A CN 113188038 A CN113188038 A CN 113188038A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/013—Single phase liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0157—Compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/036—Avoiding leaks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/046—Enhancing energy recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to the technical field of storage tank replacement gas recovery, in particular to a liquefied hydrocarbon storage tank replacement gas recovery device and a method and application thereof. The liquefied hydrocarbon detection device comprises a liquefied hydrocarbon detection storage tank, a liquefied hydrocarbon gasification separator and a liquefied hydrocarbon compressor, wherein one end of the liquefied hydrocarbon compressor is connected with a compressor inlet buffer tank, the other end of the liquefied hydrocarbon compressor is connected with a compressor outlet buffer tank, the liquefied hydrocarbon detection storage tank and the top of the liquefied hydrocarbon storage tank are connected with the compressor inlet buffer tank, the liquefied hydrocarbon detection storage tank and the bottom of the liquefied hydrocarbon storage tank are connected with the liquefied hydrocarbon gasification separator, and the compressor outlet buffer tank is respectively connected with the liquefied hydrocarbon detection storage tank and the liquefied hydrocarbon storage tank. The transfer of liquid phase, gas phase and residual liquid phase of hydrocarbon substances is fully completed by reasonably designing the connection relation of a liquefied hydrocarbon storage tank to be detected, a liquefied hydrocarbon storage tank, a liquefied hydrocarbon gasification separator and a liquefied hydrocarbon compressor. And through setting up the water filling port, when avoiding occuring accident and revealing, liquefied hydrocarbon outflows.
Description
Technical Field
The invention relates to the technical field of storage tank replacement gas recovery, in particular to a liquefied hydrocarbon storage tank replacement gas recovery device and a method and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The liquefied hydrocarbon is one of basic raw materials of petrochemical industry, and can be used for producing various important organic chemical raw materials, such as liquefied hydrocarbon nitrile, propylene oxide, cumene, butanol, octanol and the like. Since liquefied hydrocarbons are basic raw materials, general chemical enterprises directly reprocess commercial liquefied hydrocarbons. Liquefied hydrocarbons are transported from the raw material producer to the demanding party and are typically stored in large quantities, with the storage tanks used to store the liquefied hydrocarbons being tested every three years.
At present, a water ejection replacement method or a direct discharge method is commonly adopted by general chemical enterprises for replacing liquefied hydrocarbon storage tanks. The process of the water ejection replacement method comprises the following steps: because the liquefied hydrocarbon is insoluble in water and has a density lower than that of water, the liquid liquefied hydrocarbon floats on the water surface when contacting with the liquefied hydrocarbon, water is injected from the bottom of the liquefied hydrocarbon storage tank, the liquefied hydrocarbon storage tank is filled with water, and the liquefied hydrocarbon is conveyed to an adjacent storage tank from a top gas phase pipeline. The process of the direct discharge method is as follows: and (4) isolating the replaced liquefied hydrocarbon storage tank, opening the storage tank, releasing the pressure of the storage tank by using an exhaust valve, filling nitrogen for replacement, and repeatedly pressurizing and releasing the pressure until the replacement is qualified. However, the inventor researches and discovers that improper operation of the water ejection replacement method can cause a large amount of water to enter an adjacent spherical tank, thereby causing influence on production; the direct discharge method causes direct discharge of a large amount of liquefied hydrocarbons, increasing the production cost of enterprises. Furthermore, when a storage tank develops a leak, there is a lack of means to prevent the leakage of liquefied hydrocarbons.
Disclosure of Invention
The invention provides a liquefied hydrocarbon storage tank replacement gas recovery device, a method and application thereof, aiming at solving the problems that in the prior art, a large amount of water enters an adjacent spherical tank, liquefied hydrocarbon is directly discharged, the production cost is increased, and a structure for preventing the leakage of the liquefied hydrocarbon is lacked. The transfer of liquid phase, gas phase and residual liquid phase of hydrocarbon substances is fully completed by reasonably designing the connection relation of a liquefied hydrocarbon storage tank to be detected, a liquefied hydrocarbon storage tank, a liquefied hydrocarbon gasification separator and a liquefied hydrocarbon compressor. And through setting up the water filling port, when avoiding occuring accident and revealing, liquefied hydrocarbon outflows.
Specifically, the invention is realized by the following technical scheme:
the invention provides a liquefied hydrocarbon storage tank replacement gas recovery device, which comprises a liquefied hydrocarbon storage tank to be detected, a liquefied hydrocarbon storage tank, a liquefied hydrocarbon gasification separator and a liquefied hydrocarbon compressor, wherein one end of the liquefied hydrocarbon compressor is connected with an inlet buffer tank of the compressor, the other end of the liquefied hydrocarbon compressor is connected with an outlet buffer tank of the compressor, the tops of the liquefied hydrocarbon storage tank to be detected and the liquefied hydrocarbon storage tank are connected with the inlet buffer tank of the compressor, the bottoms of the liquefied hydrocarbon storage tank to be detected and the liquefied hydrocarbon storage tank are connected with the liquefied hydrocarbon gasification separator, and the outlet buffer tank of the compressor is respectively connected with the liquefied hydrocarbon storage tank to be detected and the liquefied hydrocarbon storage tank.
In a second aspect of the present invention, a liquefied hydrocarbon storage tank replacement gas recovery method is provided, wherein a liquefied hydrocarbon storage tank replacement gas recovery apparatus is adopted for recovery, and the method includes steps of liquid phase, gas phase and residual liquid phase transfer.
In a third aspect of the present invention, a system for recovering a replacement gas from a liquefied hydrocarbon storage tank is provided.
In a fourth aspect of the present invention, an apparatus and/or a method for recovering a liquefied hydrocarbon storage tank replacement gas is provided for use in recovering a liquefied hydrocarbon storage tank replacement gas.
One or more embodiments of the present invention have the following advantageous effects:
1) the transfer of liquid phase, gas phase and residual liquid phase of hydrocarbon substances is fully completed by reasonably designing the connection relation of a liquefied hydrocarbon storage tank to be detected, a liquefied hydrocarbon storage tank, a liquefied hydrocarbon gasification separator and a liquefied hydrocarbon compressor.
2) Liquefied hydrocarbon waits to detect storage tank, liquefied hydrocarbon storage tank bottom and is equipped with the water filling port, when liquefied hydrocarbon waits to detect storage tank, liquefied hydrocarbon storage tank bottom and takes place to reveal, can be to the water injection in the jar, liquefied hydrocarbon density is little, is located on the aqueous phase, what reveal this moment is water, avoids revealing of liquefied hydrocarbon, can also maintain the department of revealing simultaneously. After maintenance, the excess water in the tank can be directly conveyed to the liquefied hydrocarbon gasification separator, hydrocarbon substances dissolved in the water volatilize after being heated by hot water, and the remaining water is discharged through a liquid discharge pipe.
3) The liquefied hydrocarbon is detected and is waited to detect storage tank and liquefied hydrocarbon storage tank top and pass through nitrogen gas valve and trip valve and nitrogen gas pipeline connection, and nitrogen gas back of pressurizing can discharge the liquefied hydrocarbon and wait to detect remaining liquid in storage tank and the liquefied hydrocarbon storage tank, guarantees to shift fully.
4) The liquefied hydrocarbon is detected and is detected storage tank, liquefied hydrocarbon gasification separator, compressor import buffer tank and compressor export buffer tank top and pass through torch connecting valve and torch pipeline connection, can in time observe the interior gas condition of jar.
5) First valve to fourth valve are connected gradually by isolation valve, trip valve, isolation valve and form, first nitrogen valve and second nitrogen valve are connected gradually by isolation valve, check valve, isolation valve and form, the torch connecting valve is connected gradually by isolation valve, prevent superpressure equipment, isolation valve and forms, further ensures safety.
6) The convenient blind plate that adds between the valve keeps apart with other systems when carrying out the storage tank and examining the maintenance, keeps apart when conveniently carrying out the remote control valve and examining the maintenance operation, if use single valve, if leak in the single valve, can lead to the storage tank to replace nonconforming, can't add the blind plate when carrying out the storage tank and examining the maintenance and keep apart with other systems.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a drawing showing a replacement gas recovery apparatus for a liquefied hydrocarbon storage tank according to an embodiment 1 of the present invention;
FIG. 2 is a drawing showing a replacement gas recovery apparatus for a liquefied hydrocarbon storage tank according to embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a first valve disclosed in embodiment 2 of the present invention;
FIG. 4 is a schematic view of a first nitrogen valve disclosed in embodiment 2 of the present invention;
FIG. 5 is a schematic view of a flare connection valve disclosed in example 2 of the present invention;
wherein: 1. the liquefied hydrocarbon storage tank to be tested comprises a liquefied hydrocarbon storage tank 2, a liquefied hydrocarbon storage tank 3, a liquefied hydrocarbon gasification separator 4, a compressor inlet buffer tank 5, a liquefied hydrocarbon compressor 6, a compressor outlet buffer tank 7, a first valve 8, a second valve 9, a first isolation valve 10, a second isolation valve 11, a third isolation valve 12, a fourth isolation valve 13, a fifth isolation valve 14, a sixth isolation valve 15, a third valve 16, a fourth valve 17, a seventh isolation valve 18, an eighth isolation valve 19, a ninth isolation valve 20, a first nitrogen valve 21, a second nitrogen valve 22, a first cut-off valve 23, a second cut-off valve 24, a first torch connection valve 25, a second torch connection valve 26, a third torch connection valve 27, a fourth torch connection valve 28, and a fifth torch connection valve.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out according to conventional conditions or according to conditions recommended by the manufacturers.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention. The preferred embodiments and materials described herein are intended to be exemplary only.
It is to be understood that the terms "upper", "top", "bottom", and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, configuration, and operation in a particular orientation, and thus are not to be considered limiting.
The invention provides a liquefied hydrocarbon storage tank replacement gas recovery device, a method and application thereof, aiming at solving the problems that in the prior art, a large amount of water enters an adjacent spherical tank, liquefied hydrocarbon is directly discharged, the production cost is increased, and a structure for preventing the leakage of the liquefied hydrocarbon is lacked.
Specifically, the invention is realized by the following technical scheme:
the invention provides a liquefied hydrocarbon storage tank replacement gas recovery device, which comprises a liquefied hydrocarbon storage tank to be detected, a liquefied hydrocarbon storage tank, a liquefied hydrocarbon gasification separator and a liquefied hydrocarbon compressor, wherein one end of the liquefied hydrocarbon compressor is connected with an inlet buffer tank of the compressor, the other end of the liquefied hydrocarbon compressor is connected with an outlet buffer tank of the compressor, the tops of the liquefied hydrocarbon storage tank to be detected and the liquefied hydrocarbon storage tank are connected with the inlet buffer tank of the compressor, the bottoms of the liquefied hydrocarbon storage tank to be detected and the liquefied hydrocarbon storage tank are connected with the liquefied hydrocarbon gasification separator, and the outlet buffer tank of the compressor is respectively connected with the liquefied hydrocarbon storage tank to be detected and the liquefied hydrocarbon storage tank.
In one or more embodiments of the invention, the storage tank to be tested for liquefied hydrocarbon is connected with the liquefied hydrocarbon gasification separator through a first valve and a first isolating valve;
preferably, the liquefied hydrocarbon storage tank is connected with the liquefied hydrocarbon gasification separator through a second valve and a first isolation valve;
preferably, the bottom of the storage tank to be detected for liquefied hydrocarbon and the bottom of the liquefied hydrocarbon storage tank are provided with water injection ports.
When the liquefied hydrocarbon is detected to detect storage tank or liquefied hydrocarbon storage tank bottom and is revealed, can detect storage tank or liquefied hydrocarbon storage tank and pour into water into to the liquefied hydrocarbon, liquefied hydrocarbon density is less than water in the jar, consequently flows out from revealing to it is water, and there is sufficient time to maintain revealing, avoids liquefied hydrocarbon to reveal and pollutes operational environment.
Preferably, the bottom parts of the storage tank to be tested for liquefied hydrocarbon and the liquefied hydrocarbon storage tank are respectively connected with the water filling port through a third valve and a fourth valve;
preferably, the storage tank to be tested for liquefied hydrocarbon and the liquefied hydrocarbon storage tank are connected with the inlet buffer tank of the compressor through a third isolation valve.
In one or more embodiments of the invention, the bottom of the liquefied hydrocarbon gasification separator is provided with a hot water inlet and a drain.
Preferably, a seventh isolating valve is arranged on a liquid discharge pipe at the bottom of the liquefied hydrocarbon gasification separator, and the bottom of the liquefied hydrocarbon gasification separator is connected with a hot water inlet through a second isolating valve;
preferably, the liquefied hydrocarbon gasification separator is connected to the compressor inlet surge tank through a fourth isolation valve.
The storage tank is examined to liquefied hydrocarbon or the water of infusing in the liquefied hydrocarbon storage tank, after the department of revealing is repaiied, can flow into liquefied hydrocarbon gasification separator through first valve, first isolating valve, second valve with remaining water in the jar, hot water is added to liquefied hydrocarbon gasification separator, can heat hydrocarbon material and water in the liquefied hydrocarbon gasification separator, volatilize the hydrocarbon material of dissolving in aquatic, gaseous phase gets into compressor import buffer tank and liquefied hydrocarbon compressor through the pipeline and compresses the reprocessing, the liquid phase is discharged through the flowing back pipe.
In one or more embodiments of the invention, the compressor outlet buffer tank is connected to the liquefied hydrocarbon storage tank to be tested through a fifth isolation valve;
preferably, the compressor outlet buffer tank is connected to the liquefied hydrocarbon storage tank through a sixth isolation valve.
The liquefied hydrocarbon storage tank to be detected and the bottom of the liquefied hydrocarbon storage tank are connected with the liquefied hydrocarbon gasification separator, and the compressor outlet buffer tank is respectively connected with the liquefied hydrocarbon storage tank to be detected and the liquefied hydrocarbon storage tank. The connection mode is designed in such a way, so that the separation of a liquid phase, a gas phase and a residual liquid phase can be realized. Specifically, connecting a liquefied hydrocarbon storage tank gas phase with a compressor inlet buffer tank, pressurizing a liquefied hydrocarbon storage tank to be detected by using compressed gas generated by a compressor outlet buffer tank, and pressing liquid in the liquefied hydrocarbon storage tank to be detected into the liquefied hydrocarbon storage tank; connecting the top of a storage tank to be detected for liquefied hydrocarbon with an inlet buffer tank of a liquefied hydrocarbon compressor, pressurizing a gas phase generated by the storage tank to be detected for liquefied hydrocarbon through the inlet buffer tank of the liquefied hydrocarbon compressor, and then entering the liquefied hydrocarbon storage tank to realize the transfer of the gas phase; introducing nitrogen into a storage tank to be detected for liquefied hydrocarbon, connecting the storage tank to be detected with a liquefied hydrocarbon gasification separator, pressing residual liquid in the storage tank to be detected for liquefied hydrocarbon into the liquefied hydrocarbon gasification separator by using the pressure of the nitrogen and the protection effect of inert gas, separating the residual liquid from a gas phase in the storage tank to be detected, feeding the gas phase component into a compressor buffer tank, pressurizing by the compressor, and feeding the gas phase component into the liquefied hydrocarbon storage tank, thereby improving the recovery rate of the gas phase liquefied hydrocarbon.
Preferably, the tank to be detected for liquefied hydrocarbon and the top of the liquefied hydrocarbon storage tank are connected with the inlet buffer tank of the compressor through pipelines and a third isolation valve. Before the liquefied hydrocarbon in the tank is detected and is detected storage tank and liquefied hydrocarbon storage tank top pipeline intercommunication, the liquefied hydrocarbon is detected and is detected the storage tank and be connected with isolation valve, trip valve earlier, and the liquefied hydrocarbon storage tank is connected with isolation valve, trip valve, and the liquefied hydrocarbon in the tank is detected and is detected storage tank and liquefied hydrocarbon storage tank pipeline intercommunication and then be connected with the third isolation valve, can be respectively independent control tank liquefied hydrocarbon and detect the intercommunication of storage tank and liquefied hydrocarbon storage tank and compressor import buffer tank.
Preferably, one end of the liquefied hydrocarbon compressor is connected with the compressor inlet buffer tank through an eighth isolation valve, and the other end of the liquefied hydrocarbon compressor is connected with the compressor outlet buffer tank through a ninth isolation valve.
In one or more embodiments of the invention, the top of the tank to be tested for liquefied hydrocarbons is connected with a nitrogen pipeline through a first nitrogen valve and a first cut-off valve;
preferably, the top of the liquefied hydrocarbon storage tank is connected with a nitrogen pipeline through a second nitrogen valve and a second cut-off valve;
preferably, the liquefied hydrocarbon storage tank to be detected, the liquefied hydrocarbon storage tank, the liquefied hydrocarbon gasification separator, the compressor inlet buffer tank and the top of the compressor outlet buffer tank are connected with a flare pipeline through flare connection valves. The connection with the flare pipeline aims at long-term storage of the storage tank system, and the inert gas in the system is accumulated to cause high system pressure, so that the system is used for discharging the inert gas in the system and ensuring the stability of the gas phase.
In one or more embodiments of the invention, the first valve to the fourth valve are formed by sequentially connecting an isolation valve, a stop valve and an isolation valve;
preferably, the first nitrogen valve and the second nitrogen valve are formed by sequentially connecting an isolation valve, a check valve and an isolation valve;
preferably, the torch connecting valve is formed by sequentially connecting an isolation valve, overpressure prevention equipment and an isolation valve.
In a second aspect of the present invention, a liquefied hydrocarbon storage tank replacement gas recovery method is provided, wherein a liquefied hydrocarbon storage tank replacement gas recovery apparatus is adopted for recovery, and the method includes steps of liquid phase, gas phase and residual liquid phase transfer.
In one or more embodiments of the invention, the liquid phase transfer step comprises: the compressed gas generated by the compressor outlet buffer tank enters a liquefied hydrocarbon storage tank to be detected for pressurization, and liquefied hydrocarbon in the liquefied hydrocarbon storage tank to be detected is transferred to the liquefied hydrocarbon storage tank;
the gas phase transfer step comprises: extracting the gas phase in the liquefied hydrocarbon storage tank to be detected from the compressor inlet buffer tank, extracting the gas phase to the liquefied hydrocarbon compressor, and conveying the gas phase to the liquefied hydrocarbon storage tank through the compressor outlet buffer tank;
the residual liquid phase transfer step comprises: and pressurizing the liquefied hydrocarbon storage tank to be detected through a nitrogen pipeline, and transferring the residual liquefied hydrocarbon in the liquefied hydrocarbon storage tank to be detected into the liquefied hydrocarbon storage tank.
In a third aspect of the present invention, a system for recovering a replacement gas from a liquefied hydrocarbon storage tank is provided.
In a fourth aspect of the present invention, an apparatus and/or a method for recovering a liquefied hydrocarbon storage tank replacement gas is provided for use in recovering a liquefied hydrocarbon storage tank replacement gas.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
As shown in fig. 1, a liquefied hydrocarbon storage tank replacement gas recovery device, including liquefied hydrocarbon to detect storage tank 1, liquefied hydrocarbon storage tank 2, liquefied hydrocarbon gasification separator 3, liquefied hydrocarbon compressor 5 one end is connected with compressor import buffer tank 4, the other end is connected with compressor export buffer tank 6, liquefied hydrocarbon detects storage tank 1 and liquefied hydrocarbon storage tank 2 top and is connected with compressor import buffer tank 4, liquefied hydrocarbon detects storage tank 1 and liquefied hydrocarbon storage tank 2 bottom and is connected with liquefied hydrocarbon gasification separator 3, compressor export buffer tank 6 respectively with liquefied hydrocarbon detect storage tank 1, liquefied hydrocarbon storage tank 2 is connected.
The liquefied hydrocarbon storage tank 1 to be detected is connected with the liquefied hydrocarbon gasification separator 3 through a first valve 7 and a first isolating valve 9, and the liquefied hydrocarbon storage tank 2 is connected with the liquefied hydrocarbon gasification separator 3 through a second valve 8 and a first isolating valve 9.
The bottoms of the liquefied hydrocarbon storage tank 1 and the liquefied hydrocarbon storage tank 2 are provided with water injection ports, and the bottoms of the liquefied hydrocarbon storage tank 1 and the liquefied hydrocarbon storage tank 2 are respectively connected with the water injection ports through a third valve 15 and a fourth valve 16. The liquefied hydrocarbon storage tank 1 to be detected and the liquefied hydrocarbon storage tank 2 are connected with the compressor inlet buffer tank 4 through a third isolation valve 11. The bottom of the liquefied hydrocarbon gasification separator 3 is provided with a hot water inlet and a liquid discharge pipe, the liquid discharge pipe at the bottom of the liquefied hydrocarbon gasification separator 3 is provided with a seventh isolation valve 17, and the bottom of the liquefied hydrocarbon gasification separator 3 is connected with the hot water inlet through a second isolation valve 10. The liquefied hydrocarbon gasification separator 3 is connected with the compressor inlet buffer tank 4 through a fourth isolation valve 12, the compressor outlet buffer tank 6 is connected with the liquefied hydrocarbon storage tank 1 to be detected through a fifth isolation valve 13, and the compressor outlet buffer tank 6 is connected with the liquefied hydrocarbon storage tank 2 through a sixth isolation valve 14.
Example 2
As shown in fig. 2, the liquefied hydrocarbon storage tank replacement gas recovery device comprises a liquefied hydrocarbon storage tank 1 to be detected, a liquefied hydrocarbon storage tank 2, a liquefied hydrocarbon gasification separator 3 and a liquefied hydrocarbon compressor 5, wherein one end of the liquefied hydrocarbon compressor 5 is connected with a compressor inlet buffer tank 4, the other end of the liquefied hydrocarbon compressor is connected with a compressor outlet buffer tank 6, the tops of the liquefied hydrocarbon storage tank 1 to be detected and the top of the liquefied hydrocarbon storage tank 2 to be detected are connected with the compressor inlet buffer tank 4, the bottoms of the liquefied hydrocarbon storage tank 1 to be detected and the bottom of the liquefied hydrocarbon storage tank 2 to be detected are connected with the liquefied hydrocarbon gasification separator 3, and the compressor outlet buffer tank 6 is respectively connected with the liquefied hydrocarbon storage tank 1 to be detected and the liquefied hydrocarbon storage tank 2.
The liquefied hydrocarbon storage tank 1 to be detected is connected with the liquefied hydrocarbon gasification separator 3 through a first valve 7 and a first isolating valve 9, and the liquefied hydrocarbon storage tank 2 is connected with the liquefied hydrocarbon gasification separator 3 through a second valve 8 and a first isolating valve 9.
The bottoms of the liquefied hydrocarbon storage tank 1 and the liquefied hydrocarbon storage tank 2 are provided with water injection ports, and the bottoms of the liquefied hydrocarbon storage tank 1 and the liquefied hydrocarbon storage tank 2 are respectively connected with the water injection ports through a third valve 15 and a fourth valve 16. The liquefied hydrocarbon storage tank 1 to be detected and the liquefied hydrocarbon storage tank 2 are connected with the compressor inlet buffer tank 4 through a third isolation valve 11. The bottom of the liquefied hydrocarbon gasification separator 3 is provided with a hot water inlet and a liquid discharge pipe, the liquid discharge pipe at the bottom of the liquefied hydrocarbon gasification separator 3 is provided with a seventh isolation valve 17, and the bottom of the liquefied hydrocarbon gasification separator 3 is connected with the hot water inlet through a second isolation valve 10. The liquefied hydrocarbon gasification separator 3 is connected with the compressor inlet buffer tank 4 through a fourth isolation valve 12, the compressor outlet buffer tank 6 is connected with the liquefied hydrocarbon storage tank 1 to be detected through a fifth isolation valve 13, and the compressor outlet buffer tank 6 is connected with the liquefied hydrocarbon storage tank 2 through a sixth isolation valve 14.
The top of the liquefied hydrocarbon storage tank 1 to be detected is connected with a nitrogen pipeline through a first nitrogen valve 20 and a first cut-off valve 22, the top of the liquefied hydrocarbon storage tank 2 is connected with the nitrogen pipeline through a second nitrogen valve 21 and a second cut-off valve 23, and the top of the liquefied hydrocarbon storage tank 1 to be detected, the top of the liquefied hydrocarbon storage tank 2, the top of the liquefied hydrocarbon gasification separator 3, the top of the compressor inlet buffer tank 4 and the top of the compressor outlet buffer tank 6 are connected with a torch pipeline through torch connecting valves. The top of the liquefied hydrocarbon storage tank 1 to be detected is connected with a torch pipeline through a first torch connecting valve 24, the top of the liquefied hydrocarbon storage tank 2 is connected with the torch pipeline through a second torch connecting valve 25, the top of the liquefied hydrocarbon gasification separator 3 is connected with the torch pipeline through a third torch connecting valve 26, the top of the compressor inlet buffer tank 4 is connected with the torch pipeline through a fourth torch connecting valve 27, and the top of the compressor outlet buffer tank 6 is connected with the torch pipeline through a fifth torch connecting valve 28. The liquefied hydrocarbon compressor 5 is connected at one end to the compressor inlet buffer tank 4 through an eighth isolation valve 18 and at the other end to the compressor outlet buffer tank 6 through a ninth isolation valve 19.
As shown in fig. 3, the first valve 7 to the fourth valve 16 are formed by sequentially connecting an isolation valve, a cut-off valve, and an isolation valve, as shown in fig. 4, the first nitrogen valve 20 and the second nitrogen valve 21 are formed by sequentially connecting an isolation valve, a check valve, and an isolation valve, as shown in fig. 5, the torch connection valve is formed by sequentially connecting an isolation valve, an overpressure prevention device, and an isolation valve.
The working process is as follows: in the embodiment, the storage tank 1 to be detected for liquefied hydrocarbon is isolated from the liquefied hydrocarbon storage tank 2 by controlling the opening and closing position of the valve, the gas phase at the top of the liquefied hydrocarbon storage tank 2 can be sent to the liquefied hydrocarbon compressor 5 by adjusting the opening and closing position of the valve, the pressurized gas is sent to the storage tank 1 to be detected for liquefied hydrocarbon after being pressurized by the liquefied hydrocarbon compressor 5, and the pressure of the storage tank 1 to be detected for liquefied hydrocarbon is increased to be 0.2-0.3MPa higher than that of the storage tank 2 for liquefied hydrocarbon. The method comprises the steps of opening a first valve 7 and a second valve 8 at the bottoms of a liquefied hydrocarbon storage tank 1 to be detected and a liquefied hydrocarbon storage tank 2, closing a first isolation valve 9 of a liquefied hydrocarbon gasification separator 3, communicating the bottoms of the liquefied hydrocarbon storage tank 1 to be detected and the liquefied hydrocarbon storage tank 2, and conveying liquid materials at the bottom of the liquefied hydrocarbon storage tank 1 to be detected to the liquefied hydrocarbon storage tank 2.
On the other hand, the storage tank 1 to be tested for liquefied hydrocarbon is isolated from the storage tank 2 for liquefied hydrocarbon, after the liquid material at the bottom of the storage tank 1 to be tested for liquefied hydrocarbon is completely discharged, the first valve 7 is closed, the second valve 8 at the bottom of the storage tank 2 for liquefied hydrocarbon is closed, the first isolation valve 9 of the liquefied hydrocarbon gasification separator 3 is opened, hot water is fed into the liquefied hydrocarbon gasification separator 3 to open the first valve 7, the material at the bottom of the storage tank 1 to be tested for liquefied hydrocarbon is sent to the liquefied hydrocarbon gasification separator 3, and the liquefied hydrocarbon in the liquefied hydrocarbon gasification separator 3 is changed into gas. The generated gas phase is pressurized by the liquefied hydrocarbon compressor 5, and the pressurized gas is sent to the liquefied hydrocarbon storage tank 2. After the pressure of the liquefied hydrocarbon storage tank 1 to be detected is lower than the nitrogen pressure, feeding nitrogen into the top of the liquefied hydrocarbon storage tank 1 to be detected, replacing the liquefied hydrocarbon storage tank 1 to be detected, stopping running the liquefied hydrocarbon gasification separator 3 and the liquefied hydrocarbon compressor 5 after the content of the nitrogen sampled from the bottom of the liquefied hydrocarbon storage tank 1 to be detected is higher than a certain content, isolating the liquefied hydrocarbon storage tank 1 to be detected from the liquefied hydrocarbon storage tank 2 by controlling the opening and closing positions of valves, opening the outlet of the liquefied hydrocarbon gasification separator 3 to a torch pipeline, discharging the residual gas to a torch, and closing a nitrogen valve and a torch connecting valve until the replacement is qualified.
Example 3
A liquefied hydrocarbon storage tank replacement gas recovery method adopts the liquefied hydrocarbon storage tank replacement gas recovery device of embodiment 2 to recover, and comprises the steps of liquid phase, gas phase and residual liquid phase transfer.
The liquid phase transfer step comprises: the compressed gas generated by the compressor outlet buffer tank enters a liquefied hydrocarbon storage tank to be detected for pressurization, and liquefied hydrocarbon in the liquefied hydrocarbon storage tank to be detected is transferred to the liquefied hydrocarbon storage tank;
the gas phase transfer step comprises: extracting the gas phase in the liquefied hydrocarbon storage tank to be detected from the compressor inlet buffer tank, extracting the gas phase to the liquefied hydrocarbon compressor, and conveying the gas phase to the liquefied hydrocarbon storage tank through the compressor outlet buffer tank;
the residual liquid phase transfer step comprises: and pressurizing the liquefied hydrocarbon storage tank to be detected through a nitrogen pipeline, and transferring the residual liquefied hydrocarbon in the liquefied hydrocarbon storage tank to be detected into the liquefied hydrocarbon storage tank.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a liquefied hydrocarbon storage tank replacement gas recovery unit, a serial communication port, including liquefied hydrocarbon detect the storage tank, liquefied hydrocarbon gasification separator, liquefied hydrocarbon compressor one end is connected with compressor import buffer tank, the other end is connected with compressor outlet buffer tank, liquefied hydrocarbon detects storage tank and liquefied hydrocarbon storage tank top and compressor import buffer tank and is connected, liquefied hydrocarbon detects storage tank and liquefied hydrocarbon storage tank bottom and is connected with liquefied hydrocarbon gasification separator, compressor outlet buffer tank detects the storage tank with liquefied hydrocarbon respectively, liquefied hydrocarbon storage tank is connected.
2. The liquefied hydrocarbon storage tank replacement gas recovery device according to claim 1, wherein the liquefied hydrocarbon tank to be tested is connected to the liquefied hydrocarbon gasification separator through a first valve and a first block valve;
preferably, the liquefied hydrocarbon storage tank is connected with the liquefied hydrocarbon gasification separator through a second valve and a first isolation valve;
preferably, the bottoms of the storage tank to be detected for liquefied hydrocarbon and the liquefied hydrocarbon storage tank are provided with water injection ports;
preferably, the bottom parts of the storage tank to be tested for liquefied hydrocarbon and the liquefied hydrocarbon storage tank are respectively connected with the water filling port through a third valve and a fourth valve;
preferably, the storage tank to be tested for liquefied hydrocarbon and the liquefied hydrocarbon storage tank are connected with the inlet buffer tank of the compressor through a third isolation valve.
3. The liquefied hydrocarbon storage tank replacement gas recovery device as claimed in claim 1, wherein a hot water inlet and a drain are provided at a bottom of the liquefied hydrocarbon gasification separator;
preferably, a seventh isolating valve is arranged on a liquid discharge pipe at the bottom of the liquefied hydrocarbon gasification separator, and the bottom of the liquefied hydrocarbon gasification separator is connected with a hot water inlet through a second isolating valve;
preferably, the liquefied hydrocarbon gasification separator is connected to the compressor inlet surge tank through a fourth isolation valve.
4. The liquefied hydrocarbon storage tank replacement gas recovery device according to claim 1, wherein the compressor outlet buffer tank is connected to the liquefied hydrocarbon storage tank to be tested through a fifth isolation valve;
preferably, the compressor outlet buffer tank is connected with the liquefied hydrocarbon storage tank through a sixth isolation valve;
preferably, one end of the liquefied hydrocarbon compressor is connected with the compressor inlet buffer tank through an eighth isolation valve, and the other end of the liquefied hydrocarbon compressor is connected with the compressor outlet buffer tank through a ninth isolation valve.
5. The liquefied hydrocarbon storage tank replacement gas recovery device according to claim 1, wherein the top of the liquefied hydrocarbon tank to be tested is connected to a nitrogen pipeline through a first nitrogen valve and a first shut-off valve;
preferably, the top of the liquefied hydrocarbon storage tank is connected with a nitrogen pipeline through a second nitrogen valve and a second cut-off valve;
preferably, the liquefied hydrocarbon storage tank to be detected, the liquefied hydrocarbon storage tank, the liquefied hydrocarbon gasification separator, the compressor inlet buffer tank and the top of the compressor outlet buffer tank are connected with a flare pipeline through flare connection valves.
6. The liquefied hydrocarbon storage tank replacement gas recovery device according to claim 2, wherein the first to seventh valves are formed by connecting an isolation valve, a shut-off valve, and an isolation valve in this order;
preferably, the first nitrogen valve and the second nitrogen valve are formed by connecting three isolation valves;
preferably, the torch connecting valve is formed by sequentially connecting an isolation valve, overpressure prevention equipment and an isolation valve.
7. A liquefied hydrocarbon storage tank replacement gas recovery method, characterized in that the liquefied hydrocarbon storage tank replacement gas recovery device according to any one of claims 1 to 6 is used for recovery, and the method comprises the steps of liquid phase, gas phase and residual liquid phase transfer.
8. The liquefied hydrocarbon storage tank displacement gas recovery method as claimed in claim 7, wherein the liquid phase transfer step includes: the compressed gas generated by the compressor outlet buffer tank enters a liquefied hydrocarbon storage tank to be detected for pressurization, and liquefied hydrocarbon in the liquefied hydrocarbon storage tank to be detected is transferred to the liquefied hydrocarbon storage tank;
the gas phase transfer step comprises: extracting the gas phase in the liquefied hydrocarbon storage tank to be detected from the compressor inlet buffer tank, extracting the gas phase to the liquefied hydrocarbon compressor, and conveying the gas phase to the liquefied hydrocarbon storage tank through the compressor outlet buffer tank;
the residual liquid phase transfer step comprises: and pressurizing the liquefied hydrocarbon storage tank to be detected through a nitrogen pipeline, and transferring the residual liquefied hydrocarbon in the liquefied hydrocarbon storage tank to be detected into the liquefied hydrocarbon storage tank.
9. A liquefied hydrocarbon storage tank replacement gas recovery system, comprising the liquefied hydrocarbon storage tank replacement gas recovery apparatus according to any one of claims 1 to 6.
10. Use of the liquefied hydrocarbon storage tank replacement gas recovery apparatus of any one of claims 1 to 6 and/or the liquefied hydrocarbon storage tank replacement gas recovery method of claim 7 or 8 in liquefied hydrocarbon storage tank replacement gas recovery.
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| CN113188038B (en) | 2023-02-21 |
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