Sulfonation plant energy saving, waste water reduction, emission reduction

New Technology

Unit 38 Waste Water Crystallization
The hot air generated from the first layer of the converter and SO3 second cooler can be used for silica gel regeneration, extra hot air produces steam and hot water for raw material and finish product heat tracing. Then partial remaining hot air (100℃) further goes to Unit 38 to treat the wastewater coming from the scrubber. Crystal Na2SO4 hydrate will be produced by oxidizing the NaSO3 and Na2SO4, and evaporating water in the wastewater. Therefore, the plant can realize ZERO wastewater discharge from scrubber.

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Unit 69 Reaction Heat Recovery
The main reaction heats from the sulfur furnace and the converter generate steam directly by using a fire-tube boiler. Compared with the traditional technology, this process generates twice steam. Apart from being used in the sulfur melting unit, the steam can fully fulfill the requirement of chilling in air drying unit by replacing the electric driven chiller with steam driven lithium bromide chiller for generating chilling water. The power consumption can be 15% lower.

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Exhaust Gas Circulation Process
- Sulphonation plant exhaust gas circulation process
Patented revolutionary technology. It circulates the system exhaust gas from the ESP outlet to the main process air, raises gas pressure and adds oxygen, then goes through the process of sulfur burning and conversion, sulfonation, and exhaust gas treatment. It manages to reuse the exhaust gas discharged from the ESP, and reduces the exhaust gas discharged to the atmosphere by 96% (meaning only 4% actual emission compared with the traditional process). Meanwhile, this process reduces the caustic soda unit consumption by 7kg on 100% basis, and 2-3kg sulfur.

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Unit 38 Waste Water Crystallization
The hot air generated from the first layer of the converter and SO3 second cooler can be used for silica gel regeneration, extra hot air produces steam and hot water for raw material and finish product heat tracing. Then partial remaining hot air (100℃) further goes to Unit 38 to treat the wastewater coming from the scrubber. Crystal Na2SO4 hydrate will be produced by oxidizing the NaSO3 and Na2SO4, and evaporating water in the wastewater. Therefore, the plant can realize ZERO wastewater discharge from scrubber.

detail
Unit 69 Reaction Heat Recovery
The main reaction heats from the sulfur furnace and the converter generate steam directly by using a fire-tube boiler. Compared with the traditional technology, this process generates twice steam. Apart from being used in the sulfur melting unit, the steam can fully fulfill the requirement of chilling in air drying unit by replacing the electric driven chiller with steam driven lithium bromide chiller for generating chilling water. The power consumption can be 15% lower.

detail
Exhaust Gas Circulation Process
Patented revolutionary technology. It circulates the system exhaust gas from the ESP outlet to the main process air, raises gas pressure and adds oxygen, then goes through the process of sulfur burning and conversion, sulfonation, and exhaust gas treatment. It manages to reuse the exhaust gas discharged from the ESP, and reduces the exhaust gas discharged to the atmosphere by 96% (meaning only 4% actual emission compared with the traditional process). Meanwhile, this process reduces the caustic soda unit consumption by 7kg on 100% basis, and 2-3kg sulfur.

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WEIXIAN is an engineering company specialized in supplying turnkey sulphonation/sulphation plant and it's technology, focusing on the R&D of LABSA, SLES, SLS, AOS, HABSA, MES and other anionic surfactant production technologies.

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