Cold blow-down discharge system for offshore platform torch
By introducing CO2 bottles and central control systems into the offshore platform flare system, cold venting of the flare head is realized, which solves the problem of high consumption of existing combustion emission methods and achieves green, low-carbon emissions and energy-saving effects.
Patent Information
- Application Number
- CN202420972365.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The combustion and emission methods of the existing offshore oil and gas field torch systems lead to large fuel gas consumption and do not meet the "carbon peak and carbon neutrality" target.
A cold vent discharge system for offshore platform flares is designed. The cold vent discharge of the flare head is realized through the CO2 bottle and the central control system, eliminating the need for a continuous light and purge gas.
It achieves green and low-carbon emissions of air released from offshore platforms, saving 400,000 standard cubic meters of fuel gas per year, which is in line with the technological development direction of energy-saving, low-carbon, and safe emissions of offshore platform flare gases.
Smart Images
Figure CN222378112U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of flare gas recovery and utilization in offshore oil and gas fields, and in particular relates to an offshore platform flare cold venting and discharge system. Background Art
[0002] The flare system is an important safety facility for offshore oil and gas field production. It directs the associated gas, low-pressure separation flash gas, sealing gas of process equipment and venting air under accident conditions of platform facilities in the normal production process of the oil and gas field to the flare head for combustion and emission to ensure the safety of the platform. This type of venting air combustion and emission system requires the installation of purge gas and a permanent lamp to ensure that the venting air is ignited in time and the flare head is sealed. The permanent lamp and purge gas consume about 1,000 standard cubic meters of gas per day. In extreme weather such as strong winds, the gas consumption is even greater. This type of emission method causes a waste of resources and is not conducive to the realization of my country's "carbon peak and carbon neutrality" goals.
[0003] At present, most of the existing technologies related to venting air combustion emissions focus on the innovation of the flare head configuration, without changing the setting of the pilot light and the purge gas, and cannot reduce the consumption of fuel gas in the flare system. Therefore, how to change the venting air emission mode from combustion emission to cold venting emission through the transformation of the flare system is a key research direction for achieving green and low-carbon venting air emissions on offshore platforms. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an offshore platform flare cold venting discharge system, which aims to save fuel gas consumption and provide a solution for the green and low-carbon emission of offshore platform venting.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An offshore platform flare cold venting and discharge system, comprising a flare gas main, a flare arm, a flare head, a CO2 bottle, a CO2 fire extinguishing pipeline and a central control system;
[0007] Among them, the flare gas main pipe, flare arm and flare head are connected in sequence, a flame arrester is arranged on the flare arm, and a temperature thermocouple is arranged on the flare head for monitoring the temperature of the flare head; the CO2 bottle is connected to the inlet of the CO2 fire extinguishing pipeline through the CO2 bottle mouth valve, and the outlet of the CO2 fire extinguishing pipeline is connected to the reserved interface at the top of the flare arm; the central control system is electrically connected to the CO2 bottle mouth valve through the CO2 bottle group junction box, and the central control system is also electrically connected to the temperature thermocouple, and the central control system is used to open the CO2 bottle mouth valve according to the alarm signal fed back by the temperature thermocouple.
[0008] Preferably, a flare arm bursting piece is also provided on the flare arm, and the flare arm bursting piece is connected in parallel with the flame arrester through a bypass pipeline.
[0009] Preferably, a CO2 venting pipeline is also included, and the CO2 bottle is connected to the CO2 venting pipeline via a venting valve.
[0010] Preferably, the CO2 venting pipeline is also connected to a reserved interface on the CO2 fire extinguishing pipeline, and a CO2 pipeline bursting piece is also provided on the section of the CO2 venting pipeline.
[0011] Preferably, the alarm temperature of the temperature thermocouple is 100° C., the bursting pressure of the flare arm bursting disc is 15 kPaG, and the bursting pressure of the CO2 pipeline bursting disc is 15 MPaG.
[0012] Preferably, the CO2 bottle nozzle valve adopts a two-position three-way solenoid valve.
[0013] Preferably, the CO2 bottles are multiple and arranged in parallel, but the number does not exceed 6.
[0014] The utility model adopts the above technical solution, which has the following advantages:
[0015] 1. The utility model realizes the conversion of the existing venting flare combustion emission of the offshore platform into cold venting emission, extinguishes the ever-burning lamp, cancels the purge gas, and can save 400,000 standard cubic meters of fuel gas every year.
[0016] 2. The utility model changes the flare gas combustion emission into cold venting emission, which has the advantages of small transformation workload, small footprint, light weight, simple control process, energy saving and low carbon. It also solves the problem that conventional flare combustion emission requires a long-burning lamp to ignite and purge gas to maintain the flare seal. It is in line with the technical development direction of energy-saving, low-carbon and safe emission of flare gas on offshore platforms, and provides a solution for the green and low-carbon emission of venting air on offshore platforms. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. The same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0018] Figure 1 A schematic structural diagram of an offshore platform flare cold venting and discharge system provided in one embodiment of the utility model.
[0019] The reference numerals in the figures are as follows:
[0020] 1. Flare gas main; 2. Flare arm; 3. Flare head; 4. CO2 bottle; 5. CO2 fire extinguishing pipeline; 6. CO2 venting pipeline; 7. Flame arrester; 8. Temperature thermocouple; 9. CO2 bottle nozzle valve; 10. CO2 pipeline bursting disc; 11. CO2 bottle group junction box; 12. Flare arm bursting disc. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.
[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0027] The utility model provides an offshore platform flare cold venting emission system, including a flare gas main pipe, a flare arm and a flare head connected in sequence, a flame arrester is arranged on the flare arm, and a temperature thermocouple is arranged on the flare head; the CO2 bottle is connected to the inlet of the CO2 fire extinguishing pipeline through the CO2 bottle mouth valve, and the outlet of the CO2 fire extinguishing pipeline is connected to the reserved interface at the top of the flare arm; the central control system is electrically connected to the CO2 bottle mouth valve through the CO2 bottle group junction box, and the central control system is also electrically connected to the temperature thermocouple, and the central control system is used to open the CO2 bottle mouth valve according to the alarm signal fed back by the temperature thermocouple. The utility model realizes the conversion of the existing venting air flare combustion emission of the offshore platform to cold venting emission, extinguishes the ever-burning lamp, cancels the purge gas, and can save 400,000 standard cubic meters of fuel gas each year, which is in line with the technical development direction of energy-saving, low-carbon and safe emission of flare gas of the offshore platform, and provides a solution for the green and low-carbon emission of venting air of the offshore platform.
[0028] The offshore platform flare cold venting and discharge system provided by the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings.
[0029] Unless otherwise specified, the materials and reagents used in the following examples can be obtained from commercial sources.
[0030] See also Figure 1The offshore platform flare cold venting and discharge system provided by the utility model comprises a flare gas main pipe 1, a flare arm 2, a flare head 3, a CO2 bottle 4, a CO2 fire extinguishing pipeline 5 and a central control system. The flare gas main pipe 1, the flare arm 2 and the flare head 3 are connected in sequence. A flame arrester 7 is arranged on the flare arm 2, and a temperature thermocouple 8 is arranged on the flare head 3 to monitor the temperature of the flare head 3. The CO2 bottle 4 is connected to the inlet of the CO2 fire extinguishing pipeline 5 through the CO2 bottle mouth valve 9, and the outlet of the CO2 fire extinguishing pipeline 5 is connected to the reserved interface at the top of the flare arm 2. The central control system is electrically connected to the CO2 bottle mouth valve 9 through the CO2 bottle group junction box 11, and the central control system is also electrically connected to the temperature thermocouple 8. The central control system is used to open the CO2 bottle mouth valve 9 according to the alarm signal fed back by the temperature thermocouple 8.
[0031] In the above embodiment, preferably, a flare arm bursting disc 12 is further provided on the flare arm 2, and the flare arm bursting disc 12 is connected in parallel with the flame arrester 7 through a bypass line, and the flare arm bursting disc 12 is used for blocking the flame arrester 7 for overpressure protection.
[0032] In the above embodiment, preferably, the offshore platform flare cold venting emission system also includes a CO2 venting pipeline 6, and the CO2 bottle 4 is connected to the CO2 venting pipeline 6 through a venting valve, so that the residual pressure of the CO2 bottle 4 can be released by manually opening the venting valve.
[0033] In the above embodiment, preferably, the CO2 venting pipeline 6 is also connected to a reserved interface on the CO2 fire extinguishing pipeline 5, and a CO2 pipeline bursting piece 10 is also provided on the CO2 venting pipeline 6, and the CO2 pipeline bursting piece 10 is used for blockage and overpressure protection during the CO2 release process.
[0034] In the above embodiment, preferably, the alarm temperature of the temperature thermocouple 8 is 100° C., the bursting pressure of the flare arm bursting disc 12 is 15 kPaG, and the bursting pressure of the CO2 pipeline bursting disc 10 is 15 MPaG.
[0035] In the above embodiment, preferably, the CO2 bottle nozzle valve 9 can adopt a two-position three-way solenoid valve.
[0036] In the above embodiment, preferably, there are multiple CO2 bottles 4 arranged in parallel, but the number does not exceed 6.
[0037] When the offshore platform flare cold venting and discharge system provided by the utility model is used, its working steps are as follows:
[0038] S1. The vented flare gas passes through the flare separator (not shown) to remove droplets and part of the water vapor, and then enters the flare arm 2 and is discharged through the flame arrester 7 and the flare head 3. The flame arrester 7 can prevent the flare gas from igniting and backfiring due to lightning and other reasons after being vented.
[0039] S2. When the vented flare gas is accidentally ignited due to lightning strike or other reasons, the temperature thermocouple 8 on the flare head 3 senses the high temperature and transmits the alarm signal to the central control system. The central control system controls the CO2 bottle mouth valve 9 to open, and the CO2 gas in the CO2 bottle 4 is injected into the flare arm 2 through the CO2 fire extinguishing pipeline 5 to extinguish the fire. When the flame arrester 7 is blocked and reaches a certain pressure, the torch arm bursting disc 12 releases the flare gas pressure.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.
Claims
1. An offshore platform flare cold venting discharge system, characterized in that: Including flare gas main, flare arm, flare head, CO2 bottle, CO2 fire extinguishing pipeline and central control system; Among them, the flare gas main pipe, flare arm and flare head are connected in sequence, a flame arrester is arranged on the flare arm, and a temperature thermocouple is arranged on the flare head for monitoring the temperature of the flare head; the CO2 bottle is connected to the inlet of the CO2 fire extinguishing pipeline through the CO2 bottle mouth valve, and the outlet of the CO2 fire extinguishing pipeline is connected to the reserved interface at the top of the flare arm; the central control system is electrically connected to the CO2 bottle mouth valve through the CO2 bottle group junction box, and the central control system is also electrically connected to the temperature thermocouple, and the central control system is used to open the CO2 bottle mouth valve according to the alarm signal fed back by the temperature thermocouple.
2. The offshore platform flare cold venting discharge system according to claim 1, characterized in that: A flare arm bursting piece is also arranged on the flare arm, and the flare arm bursting piece is connected in parallel with the flame arrester through a bypass pipeline.
3. The offshore platform flare cold venting discharge system according to claim 1, characterized in that: It also includes a CO2 venting pipeline, and the CO2 bottle is connected to the CO2 venting pipeline through a venting valve.
4. The offshore platform flare cold venting discharge system according to claim 3, characterized in that: The CO2 venting pipeline is also connected to a reserved interface on the CO2 fire extinguishing pipeline, and a CO2 pipeline bursting piece is also provided on this section of the CO2 venting pipeline.
5. The offshore platform flare cold venting discharge system according to claim 4, characterized in that: The alarm temperature of the temperature thermocouple is 100° C., the bursting pressure of the flare arm bursting disc is 15 kPaG, and the bursting pressure of the CO2 pipeline bursting disc is 15 MPaG.
6. The offshore platform flare cold venting discharge system according to any one of claims 1 to 5, characterized in that: The CO2 bottle mouth valve adopts a two-position three-way solenoid valve.
7. The offshore platform flare cold venting discharge system according to any one of claims 1 to 5, characterized in that: The CO2 bottles are multiple and arranged in parallel, but the number does not exceed 6.