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Air Force Draft Enclosed Ground Flare For Oil & Gas , Refinery

Air Force Draft Enclosed Ground Flare For Oil & Gas , Refinery

Air Force Draft Enclosed Ground Flare For Oil & Gas , Refinery

Product Details:

Place of Origin: China
Brand Name: QIYAO
Certification: ISO, ASME, API

Payment & Shipping Terms:

Minimum Order Quantity: 1 set
Price: Customized Product, Quoted Case By Case
Packaging Details: Seaworthy Packing
Delivery Time: 36 - 48 weeks
Payment Terms: T/T, L/C
Supply Ability: over 20 sets per year
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Detailed Product Description
Material: Stainless Steel, Carbon Steel Funtions: Safety Measurs Under Emergency Conditions And Friendly To Environment
Applications: Oil & Gas, Refinery, Petrochemical Industries Available Service: Design, Supply, Site Supervision On Erection, Commissioning, Training.
Category: Elevated / Ground Flare Tip: Air Assistant, Air Force Draft, Sonic, Etc.
Projects Completed: Over 400 Sets Packing: Seaworthy Packing
High Light:

enclosed ground flare design


open flare system

Air Force Draft Enclosed Ground Flare For Oil & Gas , Refinery


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 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




Heavy Hydrocarbon

Discharge pressure: lower, need assist for smokeless combustion

▽Utility: Steam available



Media: Heavy Hydrocarbon

Discharge pressure: lower, need assist for smokeless combustion

Utility: Non-steam

Location: applicable for cold area.

Industry :

Coal chemical




Media: LHV or hard-combustible media like sour gas or ammonia


Natural gas

Media: Light hydrocarbon composition


Off-shore platform



Discharge pressure: Higher





 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.


Air Force Draft Enclosed Ground Flare For Oil & Gas , Refinery




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  
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  
Type of burner Steam assist
Design temperature(℃)/pressure(Kpag) 1200 / Atmospheric
Spec (Dia/H)  
Material 310/304
Outlet Mach number  
Resistance drop (Kpag)  
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  
Design temperature(℃)/pressure(Kpag) 200 / Atmospheric
Spec (Dia/H)  
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)  
Height of water seal  
Service life  
Knock-out Drum  
Design temperature(℃)/pressure(Kpag)  
Spec (Dia/H)  
Ability of knock out  
Service life  
Aircraft Warning  
Color / Type (flash / beacon / paint)  
Demountable (Y/N)  
Code of painting  



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:



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)



Air Force Draft Enclosed Ground Flare For Oil & Gas , Refinery




Contact Details
Shanghai Marine Diesel Engine Research Institute

Contact Person: Mrs. Tan Ling

Tel: 86-21-51151156

Fax: 86-21-51711742

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