Active Member
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[China]
Address: No. 3111, Huaning Road, Shanghai, 201108, P. R. China
Contact name:Tan Ling
Shanghai Marine Diesel Engine Research Institute |
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S S Ground Open Flare System Based On Vent Gas Treatment Capacity
Flare System is to handle the discharged combustible gas under the conditions of normal operation, start-up, shut-down and emergencies, which ensure the gas to be flared out instantaneously, safely and reliably and to meet the demand of environmental protection.
Flare System is a kind of safety equipment comprised of pipeline, knock out device, fire retardant equipment, flare burner, ignition system, flare riser and other components.
Flare Categories:
* Based on the vent gas media’s physical parameters (mainly for toxicity of the vent gas media), discharge pressure, flow rate and so on, the flare shall be divided into two categories – elevated flare and ground flare.
* The elevated flare, based on the support way, shall be divided into self-supported flare, inhaul supported flare and derrick supported flare. The derrick supported flare, based on types of the riser to be fixed, shall be divided into fixed derrick supported flare, demountable derrick supported flare.
* The ground flare, based on vent gas treatment capacity, shall be divided into enclosed ground flare and open ground flare.
* Based on structure of flare burner, the flare shall be divided into steam-assist flare, forced draft assist flare, defused flare, LHV flare, multi-hole collision flare, sonic flare, etc.
Options of flare types
| Elevated flare | Ground flare |
▽ Media attribute: unlimited
▽ Industry: unlimited ▽ Capacity: unlimited | ▽ Media attribute: The media which is no extremely harmful. ▽ Industry: mainly focus on chemical field ▽Capacity: up to 150t/h for enclosed ground flare and unlimited for open flare |
Options of support way for elevated flare system:
| Self-supported | Inhaul | Derrick supported | |
| Fixed flare | Demountable flare | ||
▽Industry: Natural gas processing plant
▽Capacity: small ▽Height: not higher than 20m |
▽Capacity: small ▽Height: up to 40m. | ▽Industry: refinery, coal-chemical, LNG, off-shore, etc. ▽Capacity: large ▽Height: 40-160m ▽Application: The devices matching up the flare system need “same-time start-up & shut-down” | ▽Industry: refinery, coal-chemical, LNG, off-shore, etc. ▽Capacity: large ▽Height: 40-160m ▽Application: The devices matching up multi sets of flare system can’t be “same-time start-up & shut-down”, need to reserve extra flare system for expansion and save land investment. |
Options of ground flare system
| Enclosed ground flare system | Open ground flare system |
▽ Media attribute: toxic flare gas, but not extremely or highly harmful ▽ Industry: focus on chemical industry | |
▽Capacity: not exceed 150t/h for single stack ▽Discharge pressure: up to 10kpag within BL (subject to the media) | ▽Capacity: unlimited
▽Discharge pressure: up to 80kpag within BL (subject to the media) |
Options of flare burner
| Steam assist type | Forced draft type | Diffused type | LHV type | Multi-hole collision type | Sonic type |
▽Industry: Unlimited ▽Media: Heavy Hydrocarbon ▽Discharge pressure: lower, need assist for smokeless combustion ▽Utility: Steam available | ▽Industry: Unlimited ▽Media: Heavy Hydrocarbon ▽Discharge pressure: lower, need assist for smokeless combustion ▽Utility: Non-steam ▽Location: applicable for cold area. | ▽Industry : Coal chemical
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▽Media: LHV or hard-combustible media like sour gas or ammonia | ▽Industry: Natural gas ▽Media: Light hydrocarbon composition | ▽Media: Off-shore platform
▽Discharge pressure: Higher ▽Defect: Noisy |
Working principle / flow process
Ground Flare System: The combustible gas is discharged from production equipment, flows into the battery limit of flare through vent pipe network, flows into the knock-out drum for separation of liquid drops probably contained in vent gas, flows into the water seal drum and breaks through the water seal, and then flows into main gas gathering pipe. Based on the pressure of vent gas inside the main pipe, the control valves on various staged branches are automatically opened to match up the flow rate of flare gas and ensure the burners of corresponding branches to burn smokeless under some higher pressure. The burners corresponding to the staged branches are arranged inside the enclosed chamber or fence, so the flame is invisible from outside. The safety protection devices, such as rupture disks or rupture pin valves etc., are arranged on the bypass of the branches to ensure safety.
Specifications
| Process Data | |
| Flow rate of flare gas (min/normal/max) | |
| Composition of flare gas | |
| Temperature of discharged gas (℃) | |
| Back pressure of flare battery limit (Kpa) | |
| Utility Data | |
| Source of fuel gas | |
| Pressure & temperature of fuel gas | |
| Consumption of fuel gas (Nm3/h) | |
| Purge gas | Nitrogen |
| Pressure & temperature of purge gas | |
| Consumption of purge gas (Nm3/h) | |
| Pressure & temperature of steam | |
| Consumption of steam | |
| Instrument air | |
| Pressure & temperature of instrument air | |
| Power supply | 380VAC / 50Hz / PH3 |
| Site Condition | |
| Ambient condition (design/operation) | |
| Min temperature | |
| Max temperature | |
| Humidity | |
| Max wind speed | |
| Main wind direction (Y/N) / direction | |
| Max solar radiation (W/m2) | |
| Flare radiation plus solar radiation (Y/N) | |
| Technical Requirement | |
| Design code & standard | API537 / API521 |
| Flare type | Elevated flare: self-supported / inhaul / fixed derrick supported / demounted derrick supported Ground flare: enclosed / open |
| Aircraft warning light (Y/N) | |
| Smokeless combustion (Y/N) | |
| Method of smokeless combustion | Steam / forced draft |
| Requirement for thermal radiation | |
| Max ground thermal radiation | |
| Allowed thermal radiation at *m from sterile limit | |
| Requirement for noise | |
| Near the bottom of flare riser: xxdBA | |
| At *m from flare riser: xxdBA | |
| Burner | |
| Type of burner | Steam assist |
| Design temperature(℃)/pressure(Kpag) | 1200 / Atmospheric |
| Spec (Dia/H) | |
| Material | 310/304 |
| Outlet Mach number | |
| Resistance drop (Kpag) | |
| Muffler | |
| Windshield | |
| Flame stabilizer ring | |
| Smoke elimination measures | Steam assist / forced draft |
| Size of smoke elimination interface | |
| Service life | |
| Molecular Seal | |
| Type | Dynamic seal |
| Design temperature(℃)/pressure(Kpag) | 1200 / Atmospheric |
| Spec (Dia/H) | |
| Material | 304 |
| Resistance drop (Kpag) | |
| Service life | |
| Flare Riser | |
| Type | |
| Design temperature(℃)/pressure(Kpag) | 200 / Atmospheric |
| Spec (Dia/H) | |
| Material | |
| Resistance drop (Kpag) | |
| Service life | |
| Pilot & Ignition System | |
| Pilot Qty | |
| Type | Energy-saving |
| Method of flame detection | Thermocouple / Ultraviolet ray |
| Type of ignition (manual / automatic) | Sky ignition + Inner flame ignition |
| Service life | |
| Water Seal Drum | |
| Type | Full water seal / semi water seal |
| Design temperature(℃)/pressure(Kpag) | |
| Spec (Dia/H) | |
| Material | |
| Height of water seal | |
| Service life | |
| Knock-out Drum | |
| Type | |
| Design temperature(℃)/pressure(Kpag) | |
| Spec (Dia/H) | |
| Material | |
| Ability of knock out | |
| Service life | |
| Aircraft Warning | |
| Qty | |
| Position | |
| Color / Type (flash / beacon / paint) | |
| Demountable (Y/N) | |
| Code of painting |
Advantages
1. Use international engineering software like FLARESIM, FLARENET, FLUENT, etc.;
2. Own combustion test platform to simulate combustion conditions based on various types of flare gas;
3. Own numbers of patent technologies and know-how;
4. Have professional engineering design qualification;
5. Have high-qualified engineering design team & research and development team;
6. Have plentiful and comprehensive experiences of engineering construction;
7. Have professional & high efficient after-sale service system.
Typical Project
40,000,000T/y Refining & Chemical Integration Project, at Zhejiang Petrochemical Co., Ltd.
4 sets of Open Ground Flare System shall be arranged for Phase #1 of the project:
Ethylene Ground Flare: 1931.8t/h, fence – 155*136m H15m, burner – 1164 units
Chemical Ground Flare: 1958.9t/h, fence – 166*105m H15m, burner – 1017 units
PX Ground Flare: 2144t/h, fence – 78*117*145m H15m, burner – 775 units
Styrene Ground Flare: 2369t/h, fence – 145*110m, H15m, burner – 901 units
Typical Clients
| Client | Project | Reference Data |
| Zhejiang Petrochemical Co., Ltd. | Ground Flare System for 40,000,000T/y Refining & Chemical Integration Project Phase #1 | 4 sets of Open Ground Flare System |
| Zhongan Allied Coal Chemical Co., Ltd. | Coal-to-methanol and Olefin Conversion Project | Demountable flare: 2*DN1800+DN1200+DN600+DN450 H150m |
| CNOOC Huizhou Refinery | 22,000,000T/y Refining Project | Demountable flare: 2*DN1300+DN400, H140m |
| PKOP Chimkent Refinery, Kazakhstan | Refining Upgrade Project | Demountable elevated flare: 2*DN1300+DN400, H140m |
| Sinopec-Mitsui, Shanghai | 400,000T/y Phenol Acetone Unit | 2 sets of Enclosed Ground Flare System |
| China Shenhua Coal-Oil Chemical Co., Ltd., Xinjiang Coal Chemical Corp. | 680,000T/y New Coal-based Material Project | Fixed Elevated Flare: 2*DN1800+DN800+2*DN500, H150m |
| Sinochem Quanzhou Petrochemical Co., Ltd. | 12,000,000T/y Refining Project | Fixed Elevated Flare: DN1200+DN1600+DN700, H140m |
Patent Technology:
l Demountable & common derrick elevated flare and its assembly & disassembly system (Utility Model Patent No.ZL200620048466.X)
l The Assembly & disassembly system of demountable & common derrick elevated flare and its method of assembly & disassembly (Invention Patent No.ZL200610119032.9)
l Staged discharge combustion system for combustible waste gas (Utility Patent No.ZL200620048087.0)
l Staged discharge combustion system for combustible waste gas and its method of usage method (Invention Patent No.ZL200610118674.7)
l Steam-assist flare burner (Invention Patent No.ZL200610118675.1)
l Water seal structure for flare system (Invention Patent No.ZL200810041594.5)
l Open ground flare (Utility Model Patent No.ZL201020529360.8)
l Multi-side demountable & common derrick elevated flare (Utility Model Patent No.ZL201120233838.7)
l New large stream of enclosed ground flare (Utility Model Patent No.ZL201120227204.0)
