RU2720058C1 - Mobile flare unit - Google Patents

Abstract

FIELD: power engineering.SUBSTANCE: invention relates to the field of power engineering. Mobile flare unit consists of support frame 1, dismountable structure, tower base 2, bolt joints attached to support frame 1, two tower segments 3, 4 attached to each other and to tower base 2 by flange connections, head 5 attached to upper tower segment 3 by flange connections, burner attendant 7 with flame sensor attached to head 5, ropes 9, providing stability of tower segments 3, 4 and head 5, pipeline 12, 13 for supply of combustible gas from receiver-separator 11 to head 5, according to the invention, it is equipped with hoisting and reloading device 10 and screw jacks 15, at that lifting and reloading device 10 is mounted on the base of tower 2, and screw jacks 15 are installed at corners of support frame 1 for its fixation in horizontal position.EFFECT: creation of efficient mobile flare unit with improved operational characteristics due to expansion of its functional capabilities by means of automated lifting of whole assembly into vertical position.1 cl, 2 dwg

Description

The invention relates to the oil, gas, oil production, oil refining, chemical and other industries, in particular to flare plants for smokeless burning of accidental gas emissions in the field in a wide range of gas flow and can be used where thermal neutralization of gases occurs when it is impossible utilization in technological processes and (or) their emergency release into the atmosphere.

The well-known "Flare installation" (RF patent No. 186013, IPC F23D 14/20, publ. 12/26/2018 Bull. No. 36), consisting of a high-pressure pipe, low-pressure pipe, ejector, housing, gas flow control device, nozzle apparatus, rotary wings, fixed side plates, gear sectors, lever with leaf, load, protective cover.

The disadvantage of the analogue is that it is stationary and not suitable for operation in emergency situations, due to its design features, when it is necessary to assemble the installation in the shortest possible time, which reduces the functionality of the installation.

A well-known mobile flare unit manufactured by Prema-service https://prema-service.com/ru/, containing a support frame, a tower base, tower segments, a head, ropes, a pipeline, a receiver-separator, a pilot burner, an ignition device with a sensor flame, concrete counterweights.

However, the known mobile flare unit has a number of disadvantages, namely, due to the large weight (2.5 t) of each concrete counterweight, a crane is required for transportation, and also due to the large overall dimensions of the support frame (10 by 10 m), a large the site, cleaned of shrubs and trees, which reduces the functionality of the installation and increases labor costs during its construction, which generally reduces efficiency, and as a result cannot be used as a mobile flare unit.

The object of the invention to be solved is the creation of a light prefabricated mobile flare unit, with improved operational characteristics, namely with reduced overall dimensions and weight, due to the presence of screw jacks instead of concrete counterweights and the automated lifting of the whole assembled unit to a vertical position.

The technical result of the claimed invention is the creation of an effective mobile flare unit with improved operational characteristics due to the expansion of its functionality by automatically lifting the whole unit to a vertical position.

The technical result is achieved in that a mobile flare unit consisting of a support frame, a collapsible structure, a tower base, bolted to the support frame, two tower segments attached to each other and to the tower base with flange connections, a head attached to the upper tower segment flange connections, an on-site burner with a flame sensor attached to the head, ropes ensuring stability of the tower segments and the head, a pipeline for supplying fuel g from the receiver-separator to the head, according to which, it is equipped with a lifting and transfer device and screw jacks, while the lifting and transfer device is mounted on the base of the tower, and screw jacks are installed at the corners of the support frame to fix it in a horizontal position.

To clarify the technical nature of the invention, consider: FIG. 1 - mobile flare; FIG. 2 - pneumatic diagram of a mobile flare unit, where:

1 - support frame

2 - the base of the tower,

3, 4 - tower segments,

5 - head

6 - fittings,

7 - standby burner,

8 - platform

9 - ropes

10 - lifting and handling device,

11 - receiver-separator,

12, 13 - pipelines,

14 - ignition device,

15 - screw jacks (four pieces),

16 - cylinder with a gearbox for nitrogen,

17 - propane tank,

18, 19 - pipelines,

20 - cable

21 - remote frame.

Novelty: this invention allows to obtain an efficient mobile flare unit for smokeless gas combustion in the field, due to the introduction of elements into the design that allow to obtain an easy quick-build flare unit with improved operational characteristics due to the reduction of weight and overall dimensions and by automated lifting of the whole assembled unit in vertical position.

The mobile flare unit has a collapsible design and includes two main parts: a tower with a platform 8 with a tip 5, and a support frame 1 with screw jacks 15 and ropes 9.

The support frame 1 during transportation is disassembled into separate parts: the base of the tower 2 and two tower segments 3, 4. The base of the tower 2 is attached to the central part of the support frame 1 using bolted connections.

The tower segment 4 is attached to the base of the tower 2 by bolting. The tower segment 3 is attached by a hinge to the tower segment 4, and the head 5 is fixed to the top of it by means of a bolted connection. Screw jacks 15 are inserted to give the supporting frame 1 a horizontal position. four steel ropes 9 are installed for greater stability and resistance to wind load.

A four-bolt fasten to the tower segment 4 with a lifting device 10, which consists of a remote frame 21 with a manual lifting winch and a cable 20. The winch hook is fixed to the cargo bolt on the external frame 21 of the tower segment 4. During further operation, removing the external frame 21 with the winch not necessary.

The head 5 includes: an ignition device 14 and a standby burner 7. Combustible gas is supplied to the head 5 through a supply system that includes a receiver-separator 11 and pipelines 12, 13. Pipelines 12, 13 consist of separate pipe sections and are collected in the main necessary length in place.

The device operates as follows:

Before installing a mobile flare unit, a flat platform is selected, the center of which is installed platform 8. The installation of the support frame 1 does not require leveling the soil surface with an earth moving machine. When leveling the base of tower 2, small irregularities are selected by four screw jacks 15, which, due to their small weight and thanks to the lifting and handling device 10 with a cable 20, make it possible to easily and quickly bring the structure to a strictly vertical position, which makes the mobile flare unit quick-erect, t. e. with advanced features. On the platform 8, the base of the tower 2 is installed, to which four elements of the support frame 1 with screw jacks 15 are fastened to the base of the tower 2 by bolted connections, the tower segment 4 with the lifting and handling device 10. The tower segment 3, the head 5 and the pipeline 13 are connected to each other autonomously. Before attaching the head 5 to the tower segment 3, the latter is pivotally attached to the tower segment 4. The free end of the steel cable of the lifting and handling device 10 is attached to the tower segment 3. In the assembled state, the tower segment 3 with the head 5 and the pipe 13 is raised to a vertical position using lifting and reloading device 10, which automates and reduces the assembly time of the device in an emergency, which extends the functionality and increases the efficiency of the installation, after which the tower seg cients 3, 4 bonded to each other by bolts, and to line 13 by means of a flanged connection pipe 12 is attached to the receiver-separator 11. The free ends of wire ropes 9 is attached to the support frame 1 and the fittings 6 tensioned. Combustible gas is supplied to the tip 5 through the receiver-separator 11 via pipelines 12, 13. The ignition device 14 is turned on, which is intended for the initial ignition of the standby burner 7 of the head 5. The head 5 works according to the principle of ejection. Combustion air is ejected from the lower part of the head 5 due to the energy of the gas jets formed in the head 5. The resulting air-fuel mixture ignites from the flame of the ignition device 14. In the head 5, a stable flame is formed from which the standby burner 7 is ignited.

Concrete example

When repairing an ethylene wire, it is often necessary to quickly empty the area to be repaired from ethylene. In such cases, the gas to be emptied is burned in a large-capacity mobile flare unit, which ensures its smokeless combustion. The mobile installation option allows installation of the installation near the technological unit located on the repaired section of the ethylene wire. The gas pressure in the ethylene wire is maintained at a level of 70 ... 100 atm. The gas pressure supplied to the mobile flare unit is not more than 2.0 MPa. (Fig. 2). The assembly begins with the selection of a flat site and its preparation for operation (removal of bushes and grass at a distance of at least 100 meters from the installation used). Next, in the center of the platform is installed platform 8 (Fig. 1). Installation of the support frame 1 does not require leveling the soil surface with an earth moving machine. When leveling the base of tower 2, small irregularities are selected by four screw jacks 15. On the platform 8, the base of tower 2 is placed, to which four elements of the support frame 1 with screw jacks 15 are fastened to the base of the tower 2 by bolting the tower segment 4 is fixed with a lifting - reloading device 10. The tower segment 3, the tip 5 and the pipe 13 are connected to each other autonomously. Before attaching the head 5 to the tower segment 3, the latter is pivotally attached to the tower segment 4. The free end of the steel cable 20 of the lifting device 10 is attached to the tower segment 3. In the assembled state, the tower segment 3 with the head 5 and the pipe 13 rises in a vertical position with using a lifting and reloading device 10, after which the tower segments 3, 4 are fastened together by bolted connections, and the pipe 12 with the receiver-separator is connected to the pipe 13 using a flange connection 11. The free ends of the steel ropes 9 are attached to the support frame 1 and the fittings 6 are pulled. Installation of pipelines and their connection to a mobile flare unit is carried out as follows: to a valve B1 (Fig. 2) with a gas reducer Dr1 (included in the technical unit of an ethylene wire), a purge unit is included, including pipelines 18 and 19, valves B2, B6, B3, B7, B4 and a cylinder with a reducer for nitrogen 16. For ignition of combustible gas, a portable ignition device 14 is used, where gas comes from a cylinder with propane 17.

The installation is launched as follows. The gearbox of the propane cylinder 17 opens (Fig. 2) and the ignition device 14 on the elongated handle is set on fire. After that, the handle is hooked into the head 5 so that the torch torch is directed to the standby burner 7. Valves B6 and B4 must be closed, valves VZ and B7 open. When the valve B1 of the ethylene trunk section is opened (when set to 2.0 MPa), ethylene is supplied to the gas regulator Др1 and, when it is opened, to the purge unit. The pressure gauge RP checks the initial pressure of the working gas in the purge unit, the pressure should not exceed 2.0 MPa. Gas pressure is regulated by a gas reducer Dr1. Further, ethylene from the purge unit through the gas path through the valves ВЗ and В7 enters the standby burner 7, expiring through which it ignites from the torch of the ignition device 14. After the standby burner 7 is activated, the cylinder reducer with propane 17 of the ignition device 14 closes and the ignition device 14 is carried away to safe distance from the mobile flare. After making sure that the standby burner 7 is stable burning (visually), the main burner is started. For this, valve B6 opens on the purge assembly. The working gas through the receiver-separator 11 through a pipe 19 enters the head 5 and the ignition of combustible gas occurs. When burning ethylene with a mass flow rate of up to 5000 kg / h, the flame torch is stable without traces of smoke formation. The height of the flame in this case is from 6 to 8 meters, diameter up to 2 meters. The heat flux density at a distance of 50 meters is less than 0.8 kW / m ² , which is not dangerous for the operator to be in this zone for an unlimited time. With the help of gearbox Др1, the pressure in the purge assembly is maintained at 2.0 MPa. Valve B6 must be in the fully open position. The combustion process is completed by shutting off the ethylene supply using valve B1 of the ethylene trunk section. To remove ethylene residues from the pipeline, a system for purging pipelines with an inert gas (nitrogen) is provided. The pipelines are purged alternately, with valve B4 open and valve VZ or B6 open, depending on the selected pipeline, until the residues of ethylene in the main or standby burner are completely burned out 7.

Thus, the mobile flare unit ensures emptying of the repaired section of the ethylene wire in any section in a short time without involving lifting, handling and earthmoving equipment.

According to its technical and economic advantages, in comparison with the known analogues, the claimed technical solution allows to create an effective mobile flare unit for smokeless gas combustion in the field, by expanding the functionality, allowing to obtain a light prefabricated flare unit with improved performance, reduced weight and overall dimensions by automated lifting of a complete assembled installation in a vertical position.

Claims (1)

A mobile flare unit consisting of a support frame, a collapsible structure, a tower base, bolted to the support frame, two tower segments attached to each other and to the tower base by flange connections, a head attached to the upper tower segment by flange connections, a pilot burner and flame detector attached to the head, ropes ensuring stability of the tower segments and the head, the pipeline for supplying combustible gas from the receiver-separator to the head, excellent yuschayasya in that it is provided with a hoisting and transfer device jackscrews, with lifting and transfer device is mounted on the base of the tower, and jackscrews are installed in the corners of the supporting frame for fixing it in a horizontal position.

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