Ground Pit Flare: for Combustion of Harmful Gases in Oilfields, etc.

• Customization: Available
• After-sales Service: Online Support
• Warranty: 12 Months
• Model NO.: Customizable
• Type: Flares
• Automation: Automation Automatic
• Ignition Method: Automatic Ignition
• Flame Temperature: 800 - 1200 Degrees Celsius
• Certification: ISO
• Combustion Capacity: 300 - 2000 Cubic Me
• Transport Package: Container, Bulk Cargo
• Specification: Customized
• Trademark: zexuan
• Origin: Heze, Shandong, China
• HS Code: 9613800000
• Production Capacity: 300 Sets/Year

Product Description

Scope of application

The Ground Pit Flare is an industrial waste gas treatment device, commonly used for incinerating combustible waste gases (such as refinery gas, toxic gases, biogas, etc.). Through combustion reactions, it converts waste gases into low-hazard substances like carbon dioxide and water, achieving dual functions of safe emission and environmental protection. For example, when treating tail gas from petrochemical units, it can prevent safety accidents caused by combustible gas leakage while reducing environmental pollution.

 

How it works

 

I. Structural Composition

It generally includes a pit, torch head, ventilation duct, drainage channel, and gas inlet pipeline. The pit is mostly a rectangular structure with a horizontal long edge. The torch head is embedded on one short side of the pit, with the head facing the inner side and the tail connected to the gas inlet pipeline, so that the flame burns horizontally along the length of the pit. The ventilation duct connects to the atmosphere to ensure air circulation, and the drainage channel discharges accumulated water in the pit. For instance, in petrochemical industry applications, this structural layout effectively guides waste gas combustion and controls related impacts.

 

II. Characteristics and Advantages

• Flexible Application Scenarios: It can adapt to the combustion of various flare gas components. In low-pressure conditions, it can be used with steam/air for smoke elimination, suitable for densely populated areas, residential districts, environmental-sensitive zones, and places near airports where elevated flares are inappropriate. For example, factories near residential areas can reduce impacts on surrounding residents by using ground pit flares.
• Balance of Cost and Treatment Capacity: To a certain extent, it balances construction and maintenance costs with treatment capacity. Compared with enclosed ground flares with complex structures and high costs, as well as open ground flares with limited treatment capacity and rare usage, ground pit flares have their own characteristics in treatment scenarios and gas volume adaptation, which can be flexibly applied according to actual working conditions.
• Controllable Safety and Environmental Protection: The pit structure helps control the influence range of flames and heat radiation to ensure surrounding safety. When treating waste gases, it can achieve relatively clean combustion and reduce pollutant emissions. For example, heat radiation generated by combustion is effectively dispersed through the pit design, reducing impacts on surrounding equipment and personnel.

III. Structural and Installation Parameters

1. Pit Dimensions

• Mostly rectangular, arranged horizontally along the long edge. Common dimensions are designed based on waste gas treatment capacity. For example, pits treating medium to low volumes of waste gas may be 5-15m long, 2-5m wide, and 1-3m deep (balancing heat radiation control and construction costs). Pits for large-scale petrochemical projects are larger and need optimization through fluid mechanics and heat radiation simulation.
• The pit material must be high-temperature and corrosion-resistant, usually using concrete lined with refractory and anti-corrosion materials (such as refractory bricks and high-temperature resistant coatings) to ensure long-term use without erosion from flames or waste gases.

2. Torch Head Parameters

• Installation Position: Embedded on one short side of the pit, with the head facing the inner side and the tail connected to the gas inlet pipeline, ensuring the flame burns horizontally along the pit's length to avoid concentrated heat radiation.
• Specification Adaptation: Select models based on waste gas flow and pressure. For example, torch heads with a diameter of 0.2-0.5m can be used in low-flow scenarios, while those with a diameter of over 1m are required for high-flow conditions (such as emergency venting in refineries) to ensure smooth combustion of waste gases.

 

Technical features

 

 

IV. Waste Gas Treatment Parameters

1. Gas Treatment Volume

• Covers two working conditions: normal emission and accident venting. Under normal conditions, the treatment volume depends on the factory scale. For example, small chemical plants may handle 50-500 Nm³/h. During accident venting (such as pipeline leakage or equipment overpressure), a large amount of waste gas needs to be treated in a short time, with peak flow reaching thousands or even tens of thousands of Nm³/h, requiring the design of torch heads, pipelines, and pit spaces with sufficient capacity.

2. Adaptation to Waste Gas Components

• It can treat combustible/toxic waste gases (such as hydrocarbons and hydrogen sulfide in refinery gas, carbon monoxide in coal chemical industry, etc.), and combustion parameters need to be adjusted according to components. For waste gases with high sulfur content, pay attention to the anti-corrosion design of the torch head and whether pollutants such as SO2 meet emission standards after combustion (coordinating with environmental requirements, post-treatment such as desulfurization may be added).

3. Pressure and Temperature

• The inlet pressure needs to be stable, typically with a designed inlet pressure range (such as 0.1-0.5 MPa). Too low pressure affects flame stability, while too high pressure increases the pressure resistance requirements of pipelines and equipment. The waste gas combustion temperature exceeds 1000ºC, so the pit and torch head need high-temperature resistant designs (such as using high-temperature resistant alloys for the torch head and refractory linings for the pit).

V. Safety and Environmental Protection Parameters

1. Heat Radiation Control

The pit design must ensure that surrounding heat radiation values meet standards, such as heat radiation in personnel activity areas ≤ 1.6 kW/m² (referencing industrial flare design specifications), achieved through pit dimensions, radiation-proof heat shields (if any), and flame direction control. For example, horizontal combustion along the pit's long edge disperses heat radiation, reducing impacts on the pit opening and surrounding equipment/personnel.

2. Noise Control

Combustion and waste gas emission generate noise, which needs to be controlled below 85 dB(A) (industrial plant boundary noise standards) through pit structure (such as closed/semi-closed design) and soundproof facilities (such as installing silencers in ventilation ducts) to avoid disturbing residents or affecting equipment operation.

3. Combustion Efficiency and Pollutant Emission

It requires high combustion efficiency (such as VOCs destruction rate ≥ 98%) to reduce unburned waste gas emission. Pollutants after combustion (such as NOx, SO2) must meet environmental standards, achievable by optimizing air distribution in the torch head (such as precise mixing of air and waste gas) and adding denitrification/desulfurization devices.

VI. Auxiliary System Parameters

1. Ventilation and Drainage

The ventilation duct must ensure sufficient air in the pit (providing oxygen for combustion and diluting waste gases), with the ventilation volume calculated based on combustion gas volume (usually 1.2-1.5 times the air volume required for combustion). The drainage channel must promptly discharge accumulated water in the pit (such as rainwater and condensed water) to prevent impacts on combustion or equipment corrosion, with drainage capacity matching the local maximum rainfall.

 

Company Profile

 

Address: Huji Industrial Park, Deshang Expressway, Mudan District, Heze City, Shandong Province, China
Business type: Manufacturer/factory, trading company
Business scope: manufacturing and processing machinery
Management system certification: ISO9001:2015 ISO45001:2018 ISO14001:2015
Main products: Ground flare, Biogas flares, flare stack,
Thermal Oxidation Furnace, Flue gas purification equipment

 

Heze Zexuan Equipment Manufacturing Co., Ltd. is an enterprise engaged in the manufacture of special equipment for environmental protection; sales of special equipment for environmental protection; application of industrial automation technology; sales of power electronic components; research and development of mechanical equipment; sales of intelligent instruments and meters; manufacturing of intelligent instruments and meters; research and development and promotion of comprehensive utilization of waste gas and VOCs treatment technology.
The company's main products and service directions: manufacturing of ground torches, elevated torches, waste gas venting torches, biogas torches, three waste incinerators, and wastewater treatment equipment, industrial automation and DCS system applications, wastewater treatment projects, VOCs treatment equipment and engineering construction, petrochemical accessories and instrument sales, petrochemical equipment installation, maintenance and repair, etc.; support product customization services and OEM services in the same industry, from design to manufacturing, installation, commissioning, and after-sales one-stop service.

 

Certifications

Frequently asked questions

I. Product Types and Characteristics

 

Q: What are the main types of your biogas flares?
A: We mainly have enclosed biogas flares and open biogas flares. Enclosed biogas flares can better control the combustion process and reduce noise and heat radiation; open biogas flares have the characteristics of simple structure and lower cost.
 

Q: What are the advantages of different types of biogas flares?
A: Enclosed biogas flares have high safety performance and little impact on the surrounding environment, and are suitable for places with high requirements for environmental protection and safety. Open biogas flares are relatively easy to install and maintain and are suitable for projects with limited budgets or less strict requirements for combustion effects.
 

II. Parameter Specifications

 

Q: What are the main parameters of biogas flares?
A: The main parameters include processing capacity (cubic meters/hour), combustion temperature range, ignition method, wind resistance capacity, equipment size, etc.

 

Q: How is the processing capacity determined?
A: The processing capacity depends on the amount of biogas generated in the project. We can accurately calculate according to the biogas generation data you provide and recommend a suitable processing capacity specification for you.

 

Q: What is the impact of combustion temperature on use?
A: A higher combustion temperature can ensure that biogas is fully burned and reduce harmful substance emissions. But too high a temperature may also damage the equipment, so a suitable combustion temperature needs to be selected within a safe range.

 

Q: What are the options for ignition methods?
A: Common ignition methods include electronic ignition and automatic ignition. Electronic ignition is simple to operate and has high reliability; automatic ignition is more intelligent and can realize remote control and automatic startup.

 

III. Performance and Quality

 

Q: How is the performance of biogas flares guaranteed?
A: Our products undergo strict quality inspection and performance testing to ensure stable operation under various working conditions. At the same time, we provide perfect after-sales service to promptly solve problems encountered by customers during use.

 

Q: How is the durability of the equipment?
A: We use high-quality materials and advanced manufacturing processes to improve the durability of the equipment. In addition, regular maintenance can also extend the service life of the equipment.

 

Q: Does it meet international standards?
A: Our biogas flares comply with relevant international standards, such as environmental protection standards and safety standards. Before export, we will provide corresponding certification documents to ensure that the products can smoothly enter the target market.