Flare Stacks
High-temperature combustion with a HAASE flare stack is a suitable solution for the treatment of all kinds of contaminated gas. This also applies to highly corrosive gas and process air that would not burn its own.
Standard applications are landfill gas, industrial process air, sludge gas, biogas and petroleum gas. Low calorific value gas is mixed with auxiliary gas (e.g. propane) before it enters the flare unit. For the disposal of landfill gas from old landfills and contaminated process air VocsiBox® is the ideal solution.
With the development of a special burner technology HAASE Energietechnik succeeded in setting new standards for the high-temperature combustion of contaminated gas. Moreover, HAASE flare units excel by virtue of their integrated waste heat recovery. The waste heat can be used to heat facilities on site and/or buildings located nearby.
Three different product lines of HAASE flare stacks are available:
1. LT flare stacks
- Simple flare, burning chamber not insulated
- For gases that are not subject to specific emission limits (e.g. sludge gas, biogas)
- If temperature regulation is not required for the exhaust gas
2. MT flare stacks for temperatures of up to 1,050°C
- High-temperature flare with insulated burning chamber
- For gases that require combustion and exhaust temperatures higher than 1,000°C, according to TA-Luft standards (e.g. contaminated sludge gas, biogas)
- If, at the same time, a range of control of 1:3 is sufficient, e.g. because a gas storage tank is available nearby due to discontinuous gas quantities.
3. HT flare stacks for temperatures of up to 1,250°C
- High-temperature flare with reinforced insulation in the burning chamber and with an extended range of control
- For gases that require combustion and exhaust temperatures of up to 1,250°C and a minimum flue gas residence time of more than 0.3 seconds (e.g. landfill gas or highly contaminated industrial process air, according to TA-Luft standard and UK Guideline)
- If ranges of control of 1:5 to 1:10 are required
Odourless and invisible
HAASE flare units are an environmentally safe solution to keep control of emissions. They do not produce odours and have no visible flame. HAASE flares are both reliable and sustainable and by virtue of their modern burner technology they work on a low-noise level.
HAASE flare units are pre-assembled and subject to test runs at the factory before they are finally delivered to the customer. This process ensures on site installation and commissioning will be completed quickly and effectively.
Test a flare before you buy it!
You can rent a mobile HAASE flare stack to test its efficiency. The results are convincing. Mobile flares are most suitable for applications limited in time, i.e. degasifying tests, protective degassing and for the disposal of gas in emergency situations. You can also buy these facilities second-hand. Don’t hesitate to ask!
Booster Units
Special equipment is sometimes required to extract gas from a landfill site. The so-called "booster units" increase the pressure of the landfill gas in a way that it is suitable for combustion in flare stacks or for power generation in cogeneration plants (CHP).
HAASE Energietechnik supplies booster units ready for operation and fitted into transportable containers. We also supply pre-assembled units mounted on steel skids.
Smaller mobile facilities are fitted into a standard container and consist of a booster unit, a high-temperature flare stack, and an integrated gas analysis system. This equipment can also be placed on a skid or on a concrete slab.
Depending on the required application either side channel blowers, centrifugal boosters, roots boosters, helical blowers, or liquid ring compressors will be used. This is to provide any required pressure, ranging from low pressure up to 10 bar maximum.
Not only the local gas quantities and qualities, but also the required pressure difference are key criteria that will determine which kind of equipment is suitable for the application. Attention must also be paid to the clear difference the choice of equipment makes with regard to investment costs, power supply, and running costs.
VocsiBox® - air treatment
In the treatment of low calorific value gas and MBP process air VocsiBox® combines the simplicity of biofilters with the efficiency ratio of high-temperature combustion.
VocsiBox® is the preferred solution for many applications: It produces low operating expenses and reduces greenhouse relevant emissions by 90 per cent. Exhaust emissions fall much below the TA-Luft limiting values.
VocsiBox® also meets the new German emission requirements for process air from mechanical-biological waste treatment plants. This has clearly been proven by a BMBF research project in the year 2002 carried out at the Bassum waste treatment plant.
VocsiBox® works according to the principle of regenerative thermal oxidation (RTO). Combustion is flameless and noncatalytic. The substances contained in the gas oxidize inside the reactor while the gas is flowing across a hot reaction bed at temperatures of about 1,000°C.
After the starting phase the unit will soon operate autothermally even if the energy content of the process air is very low. Autothermal operation means that no extra energy needs to be supplied to keep the process going. Propane or biogas are frequently used in the event that auxiliary firing is necessary, e.g. for the treatment of contaminated process air.
VocsiBox® in comparison to other current treatment processes
In comparison to biofilters VocsiBox® excels by virtue of a high degree of methane reduction. Reliable performance control is possible independent of the quality of the crude gas.
When compared to 3-bed facilities a major advantage of VocsiBox® is the minimization of nitrous oxide. This is due to the high temperatures applied in the process. Less requirement for insulation and a smaller number of movable parts are further benefits that underline the simplicity of the VocsiBox® process.
Individual Design
It is possible to design a VocsiBox® tailor-made for local requirements.
If, for instance, landfill gas is available to serve as cost-efficient auxiliary gas for the treatment of MBP process air the VocsiBox® reactor will be designed with a smaller thermal efficiency ratio. This reduces the cost of investment.
Should it be necessary, however, to use propane as an auxiliary gas the unit will be optimized in a way to guarantee maximum thermal efficiency and to keep the running cost low.