Hotline
Experienced Manufacturers
Production plant area of more than 10,000 square feet, more than 100 people construction team.
(physical works cases)
Industry Introduction
Since the 1980s, domestic construction steel structure has seen unprecedented development, with high-rise steel structure, space steel structure, bridge steel structure, lightweight steel structure and residential steel structure springing up. Welding, as a main connection method for building steel structure, has been developing rapidly in physics, chemistry, metallurgy, materials, electronics, computers, automatic control and other disciplines, and plays a more important role in the construction of steel structure of buildings in China with the continuous emergence of new technologies, new materials, new equipments, and new techniques. According to statistics, about more than 50 per cent of steel needs to be processed by welding before being put into use. Therefore, the improvement of welding level is the key to realise the rapid development of steel structure technology and ensure the quality of building steel structure construction.
Pollution Hazard
Commonly used methods for welding of building steel structure mainly include manual electric arc welding, gas shielded welding, self-protected electric arc welding, submerged arc welding, and so on. These processes produce particles, as well as harmful gases during operation, and the high-temperature welding process usually produces ozone, nitrogen oxides, carbon monoxide, fluoride and chloride. Without collecting and treating the exhaust gases, long term operation will be hazardous to the health of the welders, including: pneumoconiosis, manganese poisoning, fluorine poisoning, metal fume fever and electro-optical ophthalmia.
Overview of the treatment programme
For the construction of steel structure welding industry VOCs treatment technology, now in line with environmental emission requirements, and play a role in reducing the cost and efficiency of the treatment technology, is to use combustion method of treatment technology is more economical and energy-saving effective. Adopting dry filter + wind reduction and thickening + catalytic combustion combination of governance, governance can meet the emission requirements of the standard!
Process flow
Five building steel welding exhaust gas treatment first through the three-stage dry filter, removing 99% of the particles in the dusty gas, so that the organic matter is completely clean, but also to increase the later equipment operating efficiency and service life. Separated organic gas into the zeolite to concentrate or molecular sieve adsorption concentration, the organic waste gas low concentration into high concentration, large air volume conversion of small air volume to reduce the wind concentration principle.
When the adsorption concentration reaches the required self-combustion requirements, and finally through electric heating to warm up the high temperature gas of 80-100 degrees for desorption and regeneration, desorption down to the high concentration of the use of CO catalytic furnace, with the help of catalysts to make the organic waste gas in the lower temperature of ignition under the flameless combustion, so that the organic exhaust decomposition of carbon dioxide and water vapour into non-toxic.
Other treatment technology programmes
Low concentration and small air volume construction steel welding exhaust gas can be used: spray tower, uv photolysis purifier, activated carbon adsorption and other single or multiple combinations of processes for treatment;
High concentration of small air volume construction steel welding exhaust gas can be used: pretreatment + zeolite molecular sieve + catalytic combustion, pretreatment + zeolite molecular sieve + RTO thermal storage incinerator, a single catalytic combustion device or a single RTO thermal storage incinerator and so on;
High concentration and large air volume building steel welding exhaust gas can be used: pretreatment + zeolite rotor concentration + catalytic combustion or pretreatment + zeolite rotor concentration + RTO thermal storage incinerator and so on.
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Guangdong Public Security Bureau No. 44190002006305
