WO2008153444A2

WO2008153444A2 - Flare device

Info

Publication number: WO2008153444A2
Application number: PCT/RU2008/000365
Authority: WO
Inventors: Leonid Nikolaevich Parfenov
Original assignee: Leonid Nikolaevich Parfenov
Priority date: 2007-06-13
Filing date: 2008-06-09
Publication date: 2008-12-18
Also published as: RU2386897C2; WO2008153444A3; RU2007123194A

Abstract

The invention relates to a structural design for flare devices and can be used in the petrol and gas, petrochemical, chemical, coke-chemical and other industries where gases, which are not used in production processes and/or accidentally discharged into the atmosphere, are to be neutralised. The inventive flare device for smokelessly burning a gas,without forcedly supplying air and/or water steam and/or water, operates within the entire design range of flare gas flow rate by increasing the specific gas-environment air contacting surface. The flare gas is mixed with environment air by means of flat streams of exhausted gases (minimum thickness-maximum cross-section perimeter). A gas-dynamic resistance is reduced by movable gas gates having any required shape, preferably in the form of a bluff body. Gases flowing around the movable gas gates and exiting from the heads are divided into flat streams flowing in diverging directions at an angle to each other and are brought into contact with the environment air on two sides, thereby being completely burned. The number of heads, the number of the movable gates therein and the shape thereof are determined according to the parameters of a flare system. The permanent minimum flare gas flows which pass to a burning area by thin jets at a design rate, are mixed with environment air and are smokelessly burned.

Description

TORCH INSTALLATION

The invention relates to a device for flare installations and can be used in the oil and gas, petrochemical, chemical, coke and other industries for thermal neutralization of gases when it is impossible to utilize them in technological processes and / or their emergency discharge into the atmosphere.

Environmental legislation requires that gases be burned smokeless (without soot) and with a minimum content of carbon monoxide (CO) in the products of combustion.

The most common design of the head of the flare units, which is a slice of the flare pipe, on the circumference of which are placed duty burners. The heads may have devices for supplying steam and / or air and / or water. A design flaw is that in order to obtain smokeless combustion of the exhaust gas, a large quantity of air and / or water vapor and / or water must flow to the flare tip. (Strezhevsky I.I., Elnatanov A.I. Torch installations - Moscow: Chemistry. - 1989, p. 39, 40, 59).

The closest application in technical essence is the design of a flare head for smokeless combustion of gases (patent for PM RU .Nk 36876), consisting of a body and a movable inverted perforated "glass" with a central pipe of constant discharge, leaving the bottom of the "glass" up. Permanent gas discharges pass through the central pipe at different speeds, and in case of emergency discharges with increasing pressure to the calculated value, the glass starts to rise and release flare discharges to the top of the head.

The design drawback is that large and emergency gas discharges cannot be burned smokelessly, since the tip forms flare gases into the jet having a closed circular cross-section in cross section with reduced pressure inside and contracting to the central axis, with a minimum contact surface with air. In addition, the "glass" creates a large gas-dynamic resistance during emergency discharges, which prevents the use of such heads on special low-pressure flare systems and leads to an unjustified increase in its dimensions. The purpose of the invention is the creation of a flameless installation of smokeless combustion

SUBSTITUTE SHEET (RULE 26) combustible gases without forced supply of air and / or water vapor and / or water in the entire calculated range of flare gas flow rates by increasing the specific contact surface: gas / ambient air and having a minimum gas-dynamic resistance. Good mixing of the exhaust gases with the surrounding air is achieved by creating jets of a flat shape (minimum thickness — maximum cross section perimeter) of the outgoing gases. In this case, the gases flowing around the movable (e) gas (e) shutter (s) are separated into jets leaving the head (s) in diverging directions, having contact with the surrounding air on both sides, which ensures complete combustion.

The head of the flare unit for smokeless gas combustion consists of the main (s) core (s) and the salt (s) with movable (s) gap (s) gas (s) gate (s) in the amount of 1 + n (n may be from 0 to 10,000 or more), the calculated (s) calculated excess pressure, which contributes to the outflow of waste gases with high speed and turbulence. The gas (e) shutter (s) moves (s) when the flow rate changes, changing the primary (s) cross-section (s), but below it (s) the calculated pressure range is maintained, which translates the latter into the calculated gas flow rate. Gases of necessary constant flow rates can enter the combustion zone through structural gaps and / or special passages. Moving gas shutters can be of any shape (from ^{• a} rod and a plate to a spherical and a flow body, including polygonal prisms, cones and others). It is possible to supply gases to the combustion zone of other pressures and (or) other flare systems. Figure l shows the simplest basic design of the head of the flare unit for smokeless gas combustion, which consists, in this example, of one body of the head - the main pipe 1 (in this particular example, in the form of a pipe turning into a large elongation rectangle), one movable gas the shutter 2 in the form of a body of a flow around a large elongation. The head works as follows. The constant minimum consumption of flare gases enters the combustion zone with thin jets at a speed of 1 m / s or more on special trips 3 between the body and the movable gas shutter (located in the extreme closed position), mix with the surrounding air and burn smokeless. In case of emergency reset, when the flow rate increases

SUBSTITUTE SHEET (RULE 26) gases for combustion, in the flare unit the pressure rises to the calculated values of "P", the gas shutter 2 rises to a height at which the entire flare gas passes through the enlarged flow area. The gas shutter - in this example, a triangular prism - is placed in the head with the necessary angle towards the flow of flare gases and cuts the flow into diverging flat jets 4 having two-way contact with the surrounding air. After the emergency discharge stops, the gas shutter 2 is lowered by the control device "M", the flow area of the head is reduced, maintaining the calculated overpressure "P" in the head.

Thus, smokeless gas burning is ensured in a flare unit without forced supply of air and / or water vapor and / or water.

SUBSTITUTE SHEET (RULE 26)

Claims

-A-

FORMULA OF THE INVENTION TORCH INSTALLATION OF PARFENOV

Flameless installation of smokeless combustion of gases, with the exception of the fact that in the header (ax) of the necessary form there is (movable) movable (current) (lifting) (e) and / or lifting (current) gas ( e) closures in an amount of 1 to 10,000, having any shapes (from a rod and a plate to a sphere and flow bodies and others, including unequal dimensions in length and width), capable of changing the same (current) cross section (I ) head (s), when changing the gas flow in it from 0 to the calculated amount, maintaining the necessary speed of the outflow of flare gases and creating gas jets, including open and (or) open and (or) diverging in different directions, in contact with air from two sides and able to have passages into the combustion zone for gases of low and (or) other pressures of constant and (or) other pressures at the same time and (or ) various flare systems.

SUBSTITUTE SHEET (RULE 26)