Method for recovering the energy of gas expansion and a recovery device for carrying out said method
First Claim
1. A power installation comprising:
- a gas expansion means consisting of more than one gas expansion machine part arranged in the direction of natural gas pressure drop;
at least one converter of mechanical energy having a rotor being connected kinematically with the rotor of at least one gas expansion machine;
exchangers-refrigerators being not less than the number of the gas expansion machines; and
whereinthe first gas expansion machine has an inlet being connected to a high pressure natural gas source;
the outlet of a preceding gas expansion machine is connected both to the inlet of the next gas expansion machine and to the inlet branch pipe on the cooling agent side of the corresponding exchanger-refrigerator;
the outlet branch pipe on the cooling agent side of at least one exchanger-refrigerator is connected to a low pressure natural gas means.
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Accused Products
Abstract
The proposed method and the installation are intended for application in systems of reduction of natural gas from high—e.g. in a borehole or in a main pipeline down to the pressure value required for the consumer.
The essence of the proposed method is that in the known method of utilization of natural gas energy in the process of gas pressure drop from increased, e.g. in a gas main pipeline down to the required value by conversion of natural gas expansion energy to mechanical energy with the aid of the gas cooled down in the process of pressure drop as a cooling agent, the innovation is multi-stage gas pressure drop and multi-stage take-off of generated cold.
The essence of the proposed method is that a utilization power installation the inlet of which is connected to high pressure gas borehole or main pipeline (3) and the outlet—to low pressure natural gas pipeline or to low pressure natural gas consumer (7, 9), comprises a gas expansion machine (e.g. expansion gas turbine) consisting of two or more components (1, 2), arranged in the direction of pressure drop, converter (4) of mechanical energy, e.g. an with the gas expansion machine
11 Citations
14 Claims
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1. A power installation comprising:
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a gas expansion means consisting of more than one gas expansion machine part arranged in the direction of natural gas pressure drop; at least one converter of mechanical energy having a rotor being connected kinematically with the rotor of at least one gas expansion machine; exchangers-refrigerators being not less than the number of the gas expansion machines; and
whereinthe first gas expansion machine has an inlet being connected to a high pressure natural gas source; the outlet of a preceding gas expansion machine is connected both to the inlet of the next gas expansion machine and to the inlet branch pipe on the cooling agent side of the corresponding exchanger-refrigerator; the outlet branch pipe on the cooling agent side of at least one exchanger-refrigerator is connected to a low pressure natural gas means. - View Dependent Claims (3)
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2. A power installation comprising:
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a gas expansion means comprising a high pressure gas expansion machine and a low pressure gas expansion machine, the inlet of said high pressure gas expansion machine being connected to a high pressure natural gas source; wherein said high pressure gas expansion machine has an inlet, a first outlet and a second outlet, and said low pressure gas expansion machine has an inlet, a first outlet and a second outlet; a converter of mechanical energy having a rotor being connected kinematically with a rotor of at least one gas expansion machine; a first exchanger-refrigerator; and
whereinthe first outlet of the high pressure gas expansion machine is connected both to the inlet of the low pressure gas expansion machine and to the inlet branch pipe on the cooling agent side of the first exchanger-refrigerator; and the outlet branch pipe on the cooling agent side of the exchanger-refrigerator is connected to a low pressure natural gas means. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification