CN205279602U - BOG recovery system - Google Patents
BOG recovery system Download PDFInfo
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- CN205279602U CN205279602U CN201520987053.7U CN201520987053U CN205279602U CN 205279602 U CN205279602 U CN 205279602U CN 201520987053 U CN201520987053 U CN 201520987053U CN 205279602 U CN205279602 U CN 205279602U
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- bog
- natural gas
- compressor unit
- recovery system
- heat exchanger
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Abstract
The utility model provides a BOG recovery system, including natural gas storage tank, BOG vaporizer, feed gas compressor group, cryrogenic heat exchanger, still include BOG compressor unit, BOG compressor unit's import and the entry intercommunication of BOG vaporizer intercommunication, BOG compressor unit's export with feed gas compressor unit. This BOG recovery system except that having traditional BOG vaporizer and feed gas compressor group, still has the BOG compressor unit who is located between BOG vaporizer and the feed gas compressor group. BOG compressor unit can produce the gaseous state natural gas with BOG gasification and pressurize again and supply with feed gas compressor unit, so make the natural gas that the BOG gasification produced again sub zero treatment form the liquified natural gas, realize the gaseous cyclic utilization of BOG, avoided direct unloading of the unnecessary natural gas to handle the waste that brings, improved natural gas utilization efficiency, reduce the manufacturing cost of mill, the air pollution that the natural gas that so also can prevent to empty caused.
Description
Technical field
The utility model relates to gas chemical industry's technical field, in particular to a kind of BOG recovery system.
Background technology
Due to the heat energy effect that immersed pump work in the heat exchange action of tank body and air and tank produces, natural gas liquids (LiquefiedNaturalGas), flash steam (BoilofGas is there will be when LNG storage tank stores natural gas liquids, BOG), flash steam too much makes tank body pressure exceed standard. For ensureing the safety of natural gas storage tank, preventing tank inner high voltage, the flash steam in storage tank needs part to get rid of. At present, the daily evaporation amount of the BOG in natural gas storage tank is about 3%, and wherein only seldom a part is used for boiler combustion or gas for domestic use burning, and remaining major part Sweet natural gas can only carry out emptying process by blowdown system or burning of releasing flare in factory; Cause a large amount of wastes of natural gas source like this, and environmental pollution can be caused.
Practical novel content
For solve existing Sweet natural gas produce in BOG gas caused the problem of waste by discharging in a large number, the present invention provides a kind of new BOG recovery system.
The present invention provides a kind of BOG recovery system, the BOG gasifier comprising natural gas storage tank and being connected with described natural gas storage tank; The another dark cold heat exchanger also comprising feed gas compressor group and be connected with the outlet of described feed gas compressor group; The outlet of described dark cold heat exchanger is also connected with described natural gas storage tank; Also comprise BOG compressor unit; The import of described BOG compressor unit is connected with described BOG gasifier, the outlet of described BOG compressor unit is connected with the entrance of described feed gas compressor group.
Optionally, also comprise and the burning boiler that described BOG gasifier is connected.
Optionally, also comprise and the emptying device that described BOG gasifier is connected.
Optionally, the raw material gas purifying device that the entrance with described feed gas compressor group is connected also is comprised.
Optionally, heavy hydrocarbon separating tank is also comprised; Described dark cold heat exchanger comprises the natural gas runner and refrigerant flow path that are formed by the segmentation of heat exchange tube wall; Described natural gas runner comprises first-class section and second section; Described first-class section is connected with the sidewall of described heavy hydrocarbon separating tank; Described second section is connected with the tank deck of described heavy hydrocarbon separating tank; The outlet of described second section is connected with described natural gas storage tank.
Optionally, described dark cold heat exchanger is the one in dark cold case, wound tube heat exchanger and tube and shell heat exchanger.
The BOG recovery system that the utility model provides, except having traditional BOG gasifier and feed gas compressor group, also has the BOG compressor unit between BOG gasifier and feed gas compressor group. BOG gasification can be produced gaseous natural gas and again pressurize base feed air compressor group by BOG compressor unit, and then make the Sweet natural gas sub-zero treatment formation liquify natural gas again of BOG gasification generation, realize the recycle of BOG gas, avoid the direct emptying of unnecessary Sweet natural gas and process the waste brought, improve gas utilization efficiency, reduce the production cost of factory; So also can prevent the atmospheric pollution that emptying natural gas causes.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the utility model embodiment BOG recovery system schematic diagram;
Wherein: the heavy hydrocarbon separating tank of 1-natural gas storage tank, 2-BOG gasifier, 3-feed gas compressor group, the dark cold heat exchanger of 4-, first-class section of 41-, 42-second section, 5-BOG compressor unit, 6-burning boiler, 7-raw material gas purifying device, 8-.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described embodiment is only the utility model part embodiment, instead of whole embodiments. Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.
If Fig. 1, Fig. 1 are BOG recovery system schematic diagram in the utility model embodiment. It can be seen that BOG recovery system of the present utility model comprises natural gas storage tank 1, BOG gasifier 2, feed gas compressor group 3, dark cold heat exchanger 4. Wherein BOG gasifier 2 is by the pipeline connection on the upside of natural gas storage tank 1, forms gaseous natural gas for the BOG gas heat absorption gasification discharged by natural gas storage tank 1; Feed gas compressor group 3 is for increasing raw natural gas and is provided to dark cold heat exchanger 4 and carries out heat exchange process so that gaseous natural gas turns into liquify natural gas, and the liquify natural gas discharged from dark cold heat exchanger 4 is delivered to storage tank to store.
Unlike the prior art, the import also comprising BOG compressor unit 5, BOG compressor unit 5 is connected with BOG gasifier 2, export the entrance with feed gas compressor group 3 is connected. The transfer pressure reaching certain after BOG compressor unit 5 is compressed through the gaseous natural gas of BOG gasifier 2 generation is delivered to feed gas compressor group 3 again, delivers to dark cold heat exchanger 4 heat exchange refrigeration, form new LNG after compressing by feed gas compressor group 3. So, again can turn into LNG through sub-zero treatment because inhaling thermogenetic BOG, decrease BOG gas purging in existing factory LNG production process, it is to increase the actual utilising efficiency of Sweet natural gas, decrease the operation cost of factory.
In addition, the gaseous natural gas produced by BOG gasifier 2, except can reentering dark SAPMAC method, also can directly supply burning boiler 6 and use, as supply drives the gas turbine combustion of BOG compressor unit 5 and feed gas compressor group 3, for generation of compressor unit power. Certainly, liquify natural gas also can be used as the auxiliary auxiliary facility that gas for domestic use is directly supplied to the residential quarter near factory or factory.
Under special circumstances, when cannot effectively utilize the Sweet natural gas that BOG gasification produces as the equipment in factory can not run well, it is possible to corresponding emptying device is set by combustion of natural gas emptying or directly emptying.
In addition, except BOG compressor unit 5 outlet is connected with the entrance of feed gas compressor group 3, the outlet of raw material gas purifying device 7 is also had to be connected with feed gas compressor group 3, and the Sweet natural gas discharged from raw material gas purifying device 7 accounts for the very vast scale of incoming stock air compressor group gas. In order to ensure the stability of pressure, preventing BOG compressor unit 5 from producing operation irregularity, in practical application, BOG compressor unit 5 top hole pressure is substantially identical with the top hole pressure of raw material gas purifying device 7. In an embodiment, the top hole pressure of setting BOG compressor unit 5 is about 2MPa, basic identical with the top hole pressure of raw material gas purifying device 7.
In the utility model one embodiment, also comprise heavy hydrocarbon separating tank 8, dark cold heat exchanger 4 comprises the natural gas runner and refrigerant flow path that are formed by the segmentation of heat exchange tube wall, natural gas runner comprises first-class section 41 and second section 42, wherein first-class section 41 is connected with the sidewall of heavy hydrocarbon separating tank 8, and second section 42 is connected with the tank deck of heavy hydrocarbon separating tank 8; Heavy hydrocarbon liquid escape route also it is connected with bottom separating tank. In sub-zero treatment, first-class section 41 of dark cold heat exchanger 4 is entered into through overdraft, purification and dried Sweet natural gas, via decrease in temperature after heat exchange tube wall and refrigerant heat exchanger extremely between-45--60 DEG C, wherein heavy hydrocarbon component liquefies in this temperature range and forms gas-fluid two-phase mixture; Gas-fluid two-phase mixture enters into the separation of heavy hydrocarbon separating tank 8, gaseous constituent continues to form natural gas liquids through second section 42 sub-zero treatment and is delivered in natural gas storage tank 1 to store, and the heavy hydrocarbon of liquid phase is then expelled to subsequent production flow process or the direct fuel gas as burning boiler 6 through escape route. In a particular application, according to the difference of throughput, dark cold heat exchanger 4 can be dark cold case, wound tube heat exchanger or tube and shell heat exchanger.
Above the BOG recovery system in the utility model embodiment is described in detail. Apply specific case herein principle of the present utility model and enforcement mode to have been set forth; the explanation of above embodiment just understands core concept of the present utility model for helping; when not departing from the utility model principle; the utility model also can carry out some improvement and modification, and these improve and modify and also fall in protection domain of the present utility model.
Claims (6)
1. a BOG recovery system, the BOG gasifier (2) comprising natural gas storage tank (1) and being connected with described natural gas storage tank (1); The another dark cold heat exchanger (4) also comprising feed gas compressor group (3) and be connected with the outlet of described feed gas compressor group (3); The outlet of described dark cold heat exchanger (4) is also connected with described natural gas storage tank (1); It is characterized in that: also comprise BOG compressor unit (5); The import of described BOG compressor unit (5) is connected with described BOG gasifier (2), the outlet of described BOG compressor unit (5) is connected with the entrance of described feed gas compressor group (3).
2. BOG recovery system according to claim 1, it is characterised in that: also comprise and the burning boiler (6) that described BOG gasifier (2) is connected.
3. BOG recovery system according to claim 1, it is characterised in that: also comprise and the emptying device that described BOG gasifier (2) is connected.
4. BOG recovery system according to the arbitrary item of claim 1-3, it is characterised in that: also comprise the raw material gas purifying device (7) that the entrance with described feed gas compressor group (3) is connected.
5. BOG recovery system according to the arbitrary item of claim 1-3, it is characterised in that: also comprise heavy hydrocarbon separating tank (8); Described dark cold heat exchanger (4) comprises the natural gas runner and refrigerant flow path that are formed by the segmentation of heat exchange tube wall; Described natural gas runner comprises first-class section (41) and second section (42); Described first-class section (41) are connected with the sidewall of described heavy hydrocarbon separating tank (8); Described second section (42) is connected with the tank deck of described heavy hydrocarbon separating tank (8); The outlet of described second section (42) is connected with described natural gas storage tank (1).
6. BOG recovery system according to claim 5, it is characterised in that: described dark cold heat exchanger (4) is the one in dark cold case, wound tube heat exchanger and tube and shell heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520987053.7U CN205279602U (en) | 2015-12-02 | 2015-12-02 | BOG recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520987053.7U CN205279602U (en) | 2015-12-02 | 2015-12-02 | BOG recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN205279602U true CN205279602U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520987053.7U Active CN205279602U (en) | 2015-12-02 | 2015-12-02 | BOG recovery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641701A (en) * | 2016-12-07 | 2017-05-10 | 大连理工大学 | Hydrate method BOG recycling device |
| CN108661732A (en) * | 2018-05-10 | 2018-10-16 | 西安热工研究院有限公司 | A kind of liquefied natural gas (LNG) production system of combustion gas-supercritical carbon dioxide combined power |
-
2015
- 2015-12-02 CN CN201520987053.7U patent/CN205279602U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641701A (en) * | 2016-12-07 | 2017-05-10 | 大连理工大学 | Hydrate method BOG recycling device |
| CN106641701B (en) * | 2016-12-07 | 2018-10-16 | 大连理工大学 | A kind of hydrate BOG retracting devices |
| CN108661732A (en) * | 2018-05-10 | 2018-10-16 | 西安热工研究院有限公司 | A kind of liquefied natural gas (LNG) production system of combustion gas-supercritical carbon dioxide combined power |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |