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US 7,661,436 B2Granted
Liquid seal for recovering flared gas
OwnerPadam Singhinventor
Life of this patent
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Abstract
The liquid seal according to the present invention consists of a U-tube (1, 2) having one arm (1) connected to the pipe (8) collecting all the gas vented from across the plant and other arm (2) connected to a liquid holder (5). A pipe (6) provided at the top of the liquid holder (5) is connected to the gas pipe (9) leading to the flare while there is a pipe (4) at the bottom of the said liquid holder fitted with a non-return valve (10) connecting to the bottom of U-tube (1, 2). There is provided a drain pipe (3) at the bottom U-tube (1, 2) to drain out the liquid if needed.
Claims4
A device comprising:
- (a) a bent tube of U shape, such U-tube having one arm connected to a first pipe collecting vented gas released from a plant and leading to a flare stack, another arm connected to a liquid holder;
- (b) a second pipe, fitted with a non-return valve, connecting the bottom of the liquid holder to the bottom of the U-tube;
- (c) the top of the liquid holder connected to the first pipe leading to the flare stack by a third pipe;
- wherein there is provided a piping connecting the top of one arm of the U-tube to the third pipe;
- the U-tube and the liquid holder forming a structure so as to form the only passage available for the gas to escape from the plant to the flare stack;
- such gas escaping from the plant to the flare only when the liquid in the said U-tube has been completely displaced into the liquid holder due to the pressure applied by such escaping gas.
3 more elements
Dependencies are inferred from the claim text.