High-performing system of long-term storage of liquefied gases under the scheme kirillov

 

(57) Abstract:

Line gaseous vapour storage system consists of a broad low-pressure turbine mounted on the same shaft with the turbine high-pressure shut-off and control valves, receiver, two heat exchangers-heaters located between the turbines, and cryogenic machine Stirling. Line liquefied vapour consists of a high-pressure pump, a Dewar vessel and check valve installed after the high-pressure pump. Line liquefied vapour comes from cryogenic Stirling machine to storage tanks for liquefied gases. The cooling circuit of the machine Stirling passes through the heat exchangers-heaters and consists of a cooler associated with the environment, and pump. Tank for storing liquefied gas is made of high-strength steel. The use of the invention will improve the efficiency and reduce material costs for the storage of liquefied gases. 1 Il.

The invention relates to the field of cryogenic engineering, cryogenic gas refrigerating machines operating on the reverse Stirling cycle, and storage of liquefied gases, such as natural gas.

It is known that due to vneshnego depends on many factors: the form of tanks, types of insulation, etc. (R. B. Scott. The technique of low temperature. Translation edited by M. P. Malkov, Moscow, Foreign literature, 1962, S. 250). However, the emission of a pair of outside storage tanks for liquefied gases has led to the loss of valuable product, or pollution of the environment.

It is known that liquefied natural gas is considered as a promising liquid fuel, and the boiling point of liquefied natural gas corresponds to a temperature of -162oC (113 K). However, there is a problem highly efficient storage of liquefied natural gas as a cryogenic liquid.

It is known that for liquefying gases are used cycles, for example by throttling or expansion devices, however, in the field of cryogenic temperature (60-160 K), the most effective system of liquefaction is to install a cryogenic refrigerating machine Stirling. The efficiency of the Stirling refrigerating machines almost 2 times higher in comparison with other systems used for the liquefaction of gases (Osokin I. P. machinery and apparatus cryogenic engineering, Moscow, Light and food industries, 1982, S. 185-186).

Known technical solutions for the gasification of liquefied gases prior to their distribution PP Malkova, Moscow, Foreign literature, 1961, S. 287-288).

A device of the Dewar for liquid nitrogen vacuum powder insulation (Sokolov, E. J., Brodyansky C. M. Energy basis of transformation of heat and cooling processes, 2nd edition, Moscow, Energoizdat, 1981, S. 202).

A device Stirling refrigerating machines, containing the piston, the load heat exchanger (condenser), the regenerator, refrigerator (RF Patent N 2088776, CL F 02 C 6/00, 1997).

Known gas refrigerating machine Philips, working on reverse Stirling cycle, intended for the liquefaction of air (deep cooling. The collection of articles edited by M. P. Malkov, Moscow, Foreign literature, 1962, S. 35). However, before these machines were not used in the technology for storage of liquefied natural gas.

Known schematic diagram of a gas turbine with intermediate heating of gas, comprising a source of high pressure gas (e.g., compressor, combustor, high pressure, expansion high-pressure turbine, the combustion chamber low-pressure expansion turbine low pressure and consumer power, mounted on the same shaft. (Staz is. what, however, the scheme of the combined plant-based turbines, high and low pressure with intermediate heating to liquefy gases has not previously been used.

The closest analogue of the claimed invention is a device for preventing loss of nitrogen in the tanker carrying liquefied natural gas, including expansion high-pressure turbine and the consumer power, mounted on the same shaft, a container for storing liquefied gas line gas vapour and liquid vapour from the high pressure pump (see patent US 4017283, CL F 25 J 1/02, 1977).

The technical result, which can be obtained by carrying out the invention, is to improve the effectiveness of the systems and the reduction of material costs during the storage of liquefied gases, such as natural gas, as well as in enhancing the safety of operation of these systems, reducing environmental pollution and provide additional electrical energy.

To achieve this technical result is a highly efficient system for long-term storage of liquefied gases, comprising a tank for storing liquefied gas expansion turbine high pressure and consumer is anyone pressure, equipped with in-line gaseous vapour expansion low-pressure turbine mounted on the same shaft with the turbine high-pressure shut-off and control valves, receiver, two heat exchangers - heaters, located in front of the turbines, expansion tank and cryogenic machine Stirling, and in the liquid line of a flash steam is equipped with a Dewar vessel and check valve installed after the high-pressure pump, and the line liquefied vapour comes from cryogenic Stirling machine to storage tanks for liquefied gases and the cooling circuit of the machine Stirling, passing through the heat exchangers-heaters and having in its composition cooler, associated with the environment, and the pump, with a capacity to store gas produced from high-strength steel.

The introduction of the highly effective system of long-term storage of liquefied gas storage tanks for liquefied gases as a source of high pressure gas lines, vapour, consisting of a receiver, turbine high and low pressure heat exchangers-heaters located in front of them, expansion vessel, cryogenic Stirling refrigerating machine with a cooling circuit, through heat and check valve, coming from cryogenic Stirling machine to storage tanks for liquefied gas, allows to obtain a new property, i.e. precondensation flash steam liquefied gases in the condenser of the refrigeration machine with its subsequent discharge to a tank for storing liquefied gases, obtaining useful energy during the expansion of the gas in turbines, as well as to improve the refrigeration coefficient of cryogenic Stirling machine by reducing the temperature of cooling below the ambient temperature.

The drawing shows a high-performing system of long-term storage of liquefied gases.

Part of a highly efficient system of long-term storage of liquefied gases includes a tank 1 for storing liquefied gases, line 2 gaseous vapour, which includes the safety valve 3, a receiver 4, the shut-off valve 5, the first heat exchanger, a heater 6, a turbine 7 high pressure generator 8, the second heat exchanger, the heater 9, the turbine 10 low-pressure expansion tank 11, cryogenic Stirling refrigerating machine 12, consisting of a capacitor 13 and cooler 14, line 15 liquefied vapour, which includes a Dewar vessel 16, the pump 17 to the high pressure and the check valve is connected with the environment, and the pump 21, and the circuit 10 passes through the first heat exchanger-heater 6 and the second heat exchanger-heater 9.

High-performing system of long-term storage of liquefied gases is as follows.

Due to external heat gains in the upper part of the vessel 1 is formed steam liquefied gases, and capacity made of high-strength steel, designed for high pressure. When reaching the high-pressure activated safety valve 3, and the gas line gas 2 flash steam enters the receiver 4, the process goes to until the pressure in the receiver 4 becomes equal to the highest value of pressure of the vapour in the tank 1. The content receiver to the maximum possible pressure is a signal for actuation of the stop valve 5 and the inclusion of cryogenic Stirling refrigerating machine 12. In the result on line 2 of the gaseous vapour high pressure flows into the first heat exchanger-heater 6, where it is heated to increase the pressure in the heat exchange with the cooling fluid circuit 19 cooling machine 12. The heated vapour LPG high pressure enters the expansion turbine 7, which, as it expands, cools getting by poleznoe the flash steam is supplied to the second heat exchanger, the heater 9, where there is a heat exchange fluid circuit 19, after which the steam expands in the turbine 10 low pressure with additional useful work, transformed by the generator 8. To increase the differential pressure before and after the turbine 7 and 10 in line 2 is enabled expansion tank 11. Further from the tank 11, the flash steam is sucked into the condenser 13 Stirling refrigerating machine 12 where it reconcretion. The transition of flash steam in the liquid phase in the condenser 13 creates the necessary pressure differential across the line 2. Liquefied vapour line 15 plum merges into the Dewar vessel 16 and pump 17 high pressure through a check valve 18 is fed into a thermally insulated container 1 in the form of liquefied natural gas. The purpose of cooling the Stirling refrigerating machine 12 includes a circuit 19 cooling. This circuit is heated from the working fluid of the refrigeration machine 12, the coolant from the cooler 14 by a pump 21 is supplied to the cooler 20. where the heat exchange with the environment (e.g., atmospheric air), while the coolant is cooled to ambient temperature. The liquid is then fed into the heat exchangers-heaters 9 and 6, where it is cooled to a temperature below the TV, the refrigerator 14. Due to the heat exchange of the coolant with a low temperature and the working fluid of the refrigeration machine 12 is increased refrigeration coefficient of the machine 12, i.e., the reduction of driving power (not shown) of the refrigeration machine 12.

High-performing system of long-term storage of liquefied gases, comprising a tank for storing liquefied gas expansion turbine high pressure and consumer power, mounted on the same shaft, the line of gaseous vapour and liquid vapour from the high pressure pump, characterized in that provided in the line of gaseous vapour expansion low-pressure turbine mounted on the same shaft with the turbine high-pressure shut-off and control valves, receiver, two heat exchangers-heaters, located in front of the turbines, expansion tank, cryogenic machine Stirling, liquid line flash steam is equipped with a Dewar vessel and check valve, installed after the pressure vessel in this line of liquefied vapour comes from cryogenic Stirling machine to storage tanks for liquefied gases and cryogenic cooling circuit of the machine Stirling, passing through the heat exchangers of agrevate liquefied natural gas produced from high-strength steel.

 

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Rotary valve // 2120080

Drain device // 2260741

FIELD: cryogenic engineering.

SUBSTANCE: drain device comprises branch pipe mounted in the casing and provided with several coaxial baffles . The spaces between the baffles are interconnected and are connected with the space between the branch pipe and casing. The outlet section of the branch pipe is connected with the casing of a shaped cross-piece and the inner side of the branch pipe and outer side of the shaped cross-piece is provided with an adhesive coating. The nozzle is provided with fastening flange. The inlet section of the casing can be provided with ribs on the outer side, and shaped cross-piece can be made of a cone whose outer angle is 230-250°. The adsorbing coating can be applied on the outer side of the branch pipe.

EFFECT: enhanced reliability.

3 cl, 1 dwg

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