Pressure reducing system by cascade pressure step down
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F17C-007/04
G05D-016/04
F17C-013/04
출원번호
US-0694413
(2015-04-23)
등록번호
US-9625099
(2017-04-18)
발명자
/ 주소
Ding, Denis
출원인 / 주소
Clean Energy Fuels Corp.
대리인 / 주소
Sheppard, Mullin, Richter & Hampton LLP
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A system and method for reducing the pressure of a pressurized gas is provided, the system including a pressure reduction stage, the pressure reduction stage including: a knock-out bottle; a control valve connected to a gas stream inlet and configured to introduce a gas stream at an initial pressure
A system and method for reducing the pressure of a pressurized gas is provided, the system including a pressure reduction stage, the pressure reduction stage including: a knock-out bottle; a control valve connected to a gas stream inlet and configured to introduce a gas stream at an initial pressure level into the knock-out bottle; an output connected to a gas stream outlet; and a pressure sensor for monitoring the pressure within the knock-out bottle and changing the operational state of the control valve to maintain the pressure inside the knock-out bottle within a pressure range. More than one pressure reduction stage may be implemented in series to provide a more gradual step down in the gas pressure.
대표청구항▼
1. A system, comprising: a gas stream inlet for introducing a pressurized gas stream at an initial pressure level;a gas stream outlet; anda pressure reduction stage, comprising: a knock-out bottle;a control valve connected to the gas stream inlet and configured to introduce the pressurized gas strea
1. A system, comprising: a gas stream inlet for introducing a pressurized gas stream at an initial pressure level;a gas stream outlet; anda pressure reduction stage, comprising: a knock-out bottle;a control valve connected to the gas stream inlet and configured to introduce the pressurized gas stream into the knock-out bottle;a pressure sensor, wherein the pressure sensor monitors the gas pressure within the knock-out bottle and controls the control valve;an output connected to the gas stream outlet;wherein the pressure sensor places the control valve in an open position when the gas pressure within the knock-out bottle is at or below a first pressure level, and places the control valve in a closed position when the gas pressure within the knock-out bottle is at or above a second pressure level, wherein the pressure reduction stage, by way of batch processing gas flow, depressurizes the introduced pressurized gas stream to a lower pressure range comprising the first pressure level and the second pressure level; anda second pressure reduction stage, wherein the second pressure reduction stage is positioned between the output of the first pressure reduction stage and the gas stream outlet, wherein a gas stream exiting the outlet of the first pressure reduction stage is introduced into a knock-out bottle of the second pressure reduction stage through a control valve of the second pressure reduction stage;wherein a pressure sensor of the second pressure reduction stage places the control valve of the second pressure reduction stage in an open position when the gas pressure within a knock-out bottle of the second pressure reduction stage is at or below a third pressure level, and places the control valve in a closed position when the gas pressure within the knock-out bottle is at or above a fourth pressure level. 2. The system of claim 1, wherein the gas pressure of the gas stream leaving the pressure reduction stage is lower than the initial pressure level. 3. The system of claim 1, wherein the gas stream inlet comprises one or more high pressure gas connections. 4. The system of claim 1, the pressure reduction stage further comprising an emergency vent and a drainage port. 5. The system of claim 1, the pressure reduction stage further comprising a second pressure sensor, wherein the second pressure sensor also monitors the gas pressure within the knock-out bottle. 6. The system of claim 1, wherein the gas pressure of the gas stream leaving the second pressure reduction stage is lower than the gas stream leaving the first pressure reduction stage, which is lower than the initial pressure level. 7. The system of claim 1, wherein one or more of the first pressure reduction stage or the second pressure reduction stage further comprises a second pressure sensor, wherein the second pressure sensor monitors the gas pressure within the knock-out bottle. 8. The system of claim 1, further comprising: a third pressure step down stage, wherein the third pressure reduction stage is positioned between the output of the second pressure reduction stage and the gas stream outlet; andwherein the pressure sensor of the third pressure reduction stage places a control valve of the third pressure reduction stage in an open position when the gas pressure within a knock-out bottle of the third pressure reduction stage is at or below a fifth pressure level, and places the control valve in a closed position when the gas pressure within the knock-out bottle is at or above a sixth pressure level. 9. The system of claim 8, wherein the gas pressure of the gas stream leaving the third pressure reduction stage is lower than the gas stream leaving the second pressure reduction stage, which is lower than the gas stream leaving the first pressure reduction stage, which is lower than the initial pressure level. 10. The system of claim 8, wherein one or more of the first pressure reduction stage, the second pressure reduction stage, or the third pressure reduction stage further comprises a second pressure sensor, wherein the second pressure sensor monitors the gas pressure within the knock-out bottle. 11. A pressure reducing system, comprising: a first pressure reducing stage, comprising: a first control valve connected to a gas stream inlet;a first knock-out bottle connected to the first control valve, the first control valve configured to introduce a gas stream at an initial pressure from the gas stream inlet into the knock-out bottle, the first knock-out bottle further having a first outlet; anda first pressure sensor to monitor gas pressure within the first knock-out bottle and control an operational state of the first control valve to maintain the gas pressure within the first knock-out bottle within a first pressure range;a second pressure reducing stage, comprising: a second control valve connected to the first outlet;a second knock-out bottle connected to the second control valve, the second control valve configured to introduce a gas stream at a pressure within a first pressure range into the second knock-out bottle, the second knock-out bottle further having a second outlet; anda second pressure sensor to monitor gas pressure within the second knock-out bottle and control an operational state of the second control valve to maintain the gas pressure within the second knock-out bottle within a second pressure range;a third pressure reducing stage, comprising: a third control valve connected to the second outlet;a third knock-out bottle connected to the third control valve, the third control valve configured to introduce a gas stream at a pressure within a second pressure range into the third knock-out bottle, the third knock-out bottle further having a third outlet; anda third pressure sensor to monitor gas pressure within the third knock-out bottle and control an operational state of the third control valve to maintain the gas pressure within the third knock-out bottle within a third pressure range; andan outlet connection connected to the third outlet;wherein the third pressure range is lower than the second pressure range, the second pressure range is lower than the first pressure range, and the first pressure range is lower than the initial pressure. 12. The system of claim 11, further comprising more than three pressuring reducing stages.
DiBella Francis A. (Roslindale MA) Koplow Michael D. (Woburn MA) Mastronardi Richard (Medfield MA), Variable-volume storage and dispensing apparatus for compressed natural gas.
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