RU146882U1 - TORCH CLOSED INSTALLATION WITH HEAT DISPOSAL - Google Patents

Abstract

A closed heat recovery unit containing a barrel with a lower inlet and an upper outlet, provided with a protective coating, installed with a center clearance, a gas burner unit in the form of a multi-nozzle nozzle in communication with a process gas supply manifold installed in the lower inlet, and equipped with a pilot burner, characterized in that in the lower part of the barrel, coaxially, at the level of the multi-nozzle nozzle, a heat exchanger-heat exchanger is installed in the form of a cylindrical shell with welded with a screw channel in the form of a pipe coil or a cylindrical pipe coil with tightly shifted coils on its outer surface, the input and output of the heat exchanger-heat exchanger are brought out outside the installation barrel.

Description

The utility model relates to flare plants for the combustion of waste process gases in the petrochemical, gas, and oil industries.

Known flare installations of open and closed types for the combustion of waste gases (N.I. Strizhevsky. A.I. Elnatanov "Flare installations" - M. Chemistry, 1979, pp. 37-41)

However, the combustion of waste gas in these plants is without heat recovery. Therefore, the generated heat is absorbed by the walls of the heads and trunks of the flare units, which leads to burnout of the latter, their frequent repair, and a decrease in the profitability of the unit and the oil field as a whole.

The closest in technical essence is a flare unit for burning harmful emissions, containing a barrel with lower inlet and upper outlet openings, a multi-nozzle nozzle communicating with a manifold for supplying combusted gas, a pilot burner (US Pat. RF No. 2062950 for an invention, publ. 06/27/1996 g .).

The disadvantage of the prototype is the lack of heat recovery during combustion of harmful emissions, high heat load on the walls of the barrel of the flare unit and their frequent burnouts, low profitability of the oil field facility.

The objective of the utility model is to create a closed-type flare unit design for the combustion of harmful emissions, which allows heat recovery of the flare unit while reducing heat load on the walls of the flare pipe, thereby significantly reducing the repair work of the flare unit to increase the profitability of the oil field facility by utilizing heat from the flare unit .

To achieve this objective, a flare closed installation with heat recovery is proposed, containing, like the closest known one, a barrel with a lower inlet and an upper outlet, provided with a protective coating, installed with a gap in the center, a block of gas burners in the form of a multi-nozzle nozzle in communication with the supply manifolds technological combustible gas installed in the lower inlet and equipped with a standby burner.

In contrast to the known one, in the proposed flare installation in the lower part of the barrel coaxially, at the level of a multi-nozzle nozzle, a heat exchanger-heat exchanger is installed in the form of a cylindrical shell with a screw channel welded on its outer surface in the form of a pipe coil or a cylindrical pipe coil with an inlet shifted close to each other and the output of which is brought out beyond the installation barrel.

Due to the presence of a heat exchanger-utilizer restricting the combustion zone of the combusted gas, the heat released is redistributed, part of which goes to heat the walls of the heat exchanger (to heat the circulating heat carrier inside the heat exchanger), the second part, together with the combustion products, is released into the atmosphere. This reduces the thermal effect on the barrel wall of the flare unit, decreases the temperature of the wall of the flare unit, and decreases the likelihood of burnout of the barrel wall.

The presence of a heat exchanger of the utilizer makes it possible to increase the profitability of the installation and the oil field facility by heating the heat carrier used (produced water, gas, oil-water emulsion, intermediate heat carrier) and the use of heated heat carrier for the needs of the oil field facility.

Thus, heating the produced water injected into the formation by 15 ÷ 20 ° C can significantly increase oil recovery, heating the oil-water emulsion going to the end separation stage improves the quality of oil and water separation, and heating the gas discharged to the flare improves the environmental situation around the flare unit due to reduction of harmful emissions.

An intermediate heating medium is supplied for heating if the heated production medium (water, gas, oil-water emulsion) is heated in special field heat exchangers, with an intermediate heat medium that circulates between two heat exchangers using a circulation pump.

The drawing shows a flare closed installation with heat recovery.

The flare closed installation with heat recovery contains a barrel 1 with a lower inlet 2 and upper outlet 3 holes. The barrel 1 is coated externally and internally with a protective coating and is mounted on a concrete cushion 5 by means of a lower support 6 having windows 7 for supplying atmospheric air inside the installation 8. The number of windows 7 is determined from the condition for providing the necessary atmospheric air for burning the exhaust gas. In the lower inlet 2, a block of gas burners is installed in the form of a multi-nozzle nozzle 9 with a collector for supplying combusted gas 10, a standby burner 11 in communication with a pipeline for supplying gas to a standby burner 12.

In the lower part of the barrel, coaxially, at the level of the multi-nozzle nozzle, a heat exchanger-heat exchanger 13 is installed with an inlet pipe of the coolant 14 and an outlet pipe 15.

Flare installation works as follows.

The stream of discharged gas for combustion is supplied through the manifold 10 to the multi-nozzle nozzle 9, where at the outlet the gas is connected to air, forming a combustible mixture, which is ignited by the flame of the standby burner 11.

At the same time, a heated medium is supplied to the inlet of the pipe coil 14 of the heat exchanger-heat exchanger 13, which is pumped through the internal surface of the screw channel of the heat exchanger-heat exchanger 13 under its own pressure, or under the pressure of the circulation pump of the oilfield object, and is heated to the design temperature and through the outlet of the pipe 15 of the pipe the coil is fed into the appropriate pipeline of the oilfield facility for use.

So, heated water can be supplied to the PPD system for injection into the reservoir, heated water-oil emulsion to the end separation stage, and heated heavy gas (density> 1.2 kg / nm3) to the waste gas pipeline for combustion.

Utilization of heat of the flare unit can significantly increase the efficiency of the flare unit, increase the profitability of the oil field as a whole.

In addition, the heat exchanger-utilizer 13 is a protective screen that protects the walls of the barrel of the flare unit from overheating, increasing the service life of the installation.

Claims (1)

A closed heat recovery unit containing a barrel with a lower inlet and an upper outlet, provided with a protective coating, installed with a center clearance, a gas burner unit in the form of a multi-nozzle nozzle in communication with a process gas supply manifold installed in the lower inlet, and equipped with a pilot burner, characterized in that in the lower part of the barrel, coaxially, at the level of the multi-nozzle nozzle, a heat exchanger-heat exchanger is installed in the form of a cylindrical shell with welded with a screw channel in the form of a pipe coil or a cylindrical pipe coil with tightly shifted coils on its outer surface, the inlet and outlet of the heat exchanger-heat exchanger are brought out outside the installation barrel.

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