RU2344345C1 - Torch installation cap - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention relates to caps of torch installations for constant, periodic or emergency discharge and subsequent burning of disposed combustible gases and steams, can be used in oil-extracting, oil refining, petrochemical and chemical industries and allows to increase reliability of torch installations launching both at primary firing, and at repeated firing in emergency condition of non-authorised flame failure. The specified technical result is achieved due to the fact that in torch installation cap containing a torch tip, duty torch, firing chamber of the duty torch, electric ignitor and electrodes for firing of the electric ignitor, according to the invention, the electric ignitor is located between the torch tip and the duty torch in such a manner that axes of the torch tip, electric ignitor and duty torch are located in one plane, with the spark interval of the electric ignitor being placed in the aforesaid plane above the bottom cross point of torch tip and duty torch diffusers forming cones extension. The spark interval is located within the borders of torch tip and duty torch injection cones, the axis of electric ignitor being arranged between tip torch cap and duty torch axes.

EFFECT: increased reliability of torch installations launching both at primary firing, and at repeated firing in emergency condition of non-authorised flame failure.

1 dwg

Description

The invention relates to the heads of flare plants for continuous, periodic or emergency discharge and subsequent combustion of utilized combustible gases and vapors and can be used in the oil, refining, petrochemical and chemical industries.

Known tip of the flare unit (1) (RU 2244875, F23D 14/20), comprising a vertical flare barrel with inlet and outlet nozzles and equipped with an ignition outlet section, a gas conduit and a pilot burner connected to the supply pipe. It consists of 3 coaxially arranged vertical circuits with slit-shaped gaps provided between them for air ejection from the environment, the head is also equipped with gas supply pipes ending with replaceable gas distribution nozzles, the two upper circuits have a gas-air flow turbolizer, in addition, the first circuit located in the lower part of the head is an accelerator chamber lined with heat-resistant composite material the flow of combustion products of the gas part due to the presence in local narrowing of the inner cavity of the chamber, the two upper circuit gussets fastened together.

A known ignition chamber with a discharge stream (2) for monitoring the ignition conditions of the gas flared using a high-voltage arc. The ignition chamber contains a branch tube that is suspended from the central part of the flare tip and is mounted so that the electrodes are located below the end of the flare tip. Part of the gas is discharged through a discharge tube into the ignition chamber, where the gas is mixed with air, ignited by a high-voltage discharge and ignites the main flame. At high flow rates, work is carried out in a similar manner. In this case, the exhaust gas expands and slows down inside the chamber, mixes with air, ignites and burns near the main flare rack.

The disadvantage of these technical solutions is the possibility of unauthorized flame failure and non-start of the flare unit, and, accordingly, leakage of the utilized component.

The objective of the invention is to increase the reliability of starting flare plants both during the initial ignition of the utilized component, and during re-ignition in an emergency situation of unauthorized flame failure.

The essence of the invention lies in the fact that the proposed tip of the flare installation comprising a flare tip, a standby burner, an ignition chamber for a standby burner, an electric igniter and electrodes for igniting an electric igniter, the electric igniter being located between the flare tip and the standby burner so that the axis of the flare tip electric igniter and pilot burner are located in the same plane, and the spark gap of the electric igniter is located in the aforementioned lower spine above the intersection point of extension forming cones diffusers flare tip and the pilot burner, the spark gap is located within the borders of the spray cones of the flare tip and the pilot burner, and the axis of the electric igniter is disposed between the axes of ferrule flare tip and the pilot burner.

The drawing schematically shows the proposed flare head.

The flare head contains:

flare tip 1; duty burner 2; standby burner ignition chamber 3; an electric igniter 4 located between the flare tip and the pilot burner in the same plane with them; ignition electrodes 5 of an electric igniter; spark gap 6, located above the lower point 7 of the continuation of the generatrix 9 and 8 of the diffuser of the torch tip and the pilot burner within the spray cones 11 and 10 of the torch tip and the pilot burner.

The device operates as follows.

Gas is supplied to the ignition chamber 3 of the standby burner 2 and ignited by the electric igniter 4 using the high-voltage arc of the spark gap 6 of the electric igniter. The pilot torch torch is prepared for ignition of the flare tip 1. When gas is supplied to the flare tip 1, it ignites. The flare head begins to work in the standard mode of utilization of the gas-air mixture. In case of unauthorized extinction of the flame of the standby burner 2 (contamination of the nozzle of the standby burner, malfunction of the separator along the gas path of the standby burner, emergency discharge of liquid into the nozzle of the standby burner, etc.) and the flame of the flare tip 1 (gust of wind, air bubble gas path of the flare head, emergency reflux of liquid, etc.), ignition of the flare head will be made from an electric igniter 4, placed in the same plane of the flare tip 1 and the standby burner 2 with simultaneous Wat spray cones flare tip and the pilot burner.

It is known that in practice the restoration of the flare system to normal operation is often not possible, because requires stopping the entire flare installation, dismantling the flare systems, preventive maintenance of the standby burner, which, as a rule, cannot be completed in a short time by the emergency reset mode and the inadmissibility of the torch idle time.

Thus, the placement of the electric igniter 4 in the same plane of the axes of the flare tip and the standby burner 2 between them and at the same time the placement of the spark gap 6 above the bottom point 7 of the forming cones of the diffusers of the flare tip 9 and the forming standby burner 10 of the proposed installation allows, in comparison with the prototype, to increase the reliability its work by ensuring duplication of the ignition of the fuel-air mixture of both the ignition chamber of the standby burner and the chamber of ignition of the flare tip. In addition, increases the reliability of the initial launch of the flare installation.

By preliminary tests of an experimental model of the flare head in the system of OAO TATNEFT (enterprise of ZAO Geology) equipped with the above-mentioned design of the electric igniter and pilot burner systems, the following advantages are confirmed:

- the delays of the initial launch of the associated petroleum gas flare and the downtime of the flare in the regime of permanent or emergency discharge have been completely eliminated;

- Uninterrupted start-up and operation of the torch is ensured in the presence of non-combustible components in the utilized gas (up to 60-80%), high humidity (up to 10-25%), during unauthorized emergency discharge due to differences in the folds of the terrain of the supply pipelines of liquid oil products (gasoline, gas condensate).

Information sources

1. RU Pat. 2244875, IPC F23D 14/20.

2. Mactronis Enerflex Outflow Ignition Chamber Convels Russia, Moscow T: +70955428756, e-mail@konvelc.ru.

Claims (1)

A flare tip containing a flare tip, a pilot burner, a pilot burner ignition chamber, an electric igniter and electric igniter ignition electrodes, characterized in that the electric ignitor is located between the torch tip and the pilot burner so that the axis of the torch tip, electric pilot and pilot burner located in one plane, and the spark gap of the electric igniter is located in the said plane above the lower intersection point of the product the generatrix of the cones of the diffuser of the torch tip and the pilot burner, while the spark gap is located within the boundaries of each of the spray cones of the torch tip and the pilot burner, and the axis of the electric igniter is located between the axes of the torch tip and the pilot burner.