Rubber additives

The 15t/h CBS wastewater triple-effect evaporation and crystallization system is specifically designed for the production wastewater of CBS (N-cyclohexyl-2-benzothiazole sulfenamide), a rubber accelerator. A single unit has an evaporation capacity of 15t/h (360t/d), employing a "triple-effect cross-flow forced circulation + DTB staged crystallization" process. Steam consumption is ≤0.24t/t water, and the byproduct anhydrous Na₂SO₄ has a purity ≥99% and a whiteness ≥88, which can be directly supplied to ion-exchange membrane caustic soda enterprises, achieving zero discharge of CBS wastewater and high-value utilization of salt resources.

Conqinphi designed a 300t/d triple-effect evaporator for this client, suitable for wastewater from mixed processes involving accelerators M, DM, CZ, and NS. The designed evaporation capacity is 12.5t/h, employing a "triple-effect cross-flow forced circulation + low-temperature DTB crystallization" process. Steam consumption is ≤0.26t/t water, and the purity of byproduct Na₂SO₄ or NaCl is ≥98.5%, helping the client achieve the dual goals of "zero discharge" and resource recovery.

This system is supporting equipment for a newly built 30,000-ton/year RD (2,2,4-trimethyl-1,2-dihydroquinoline) production line of a rubber additives group. The designed processing capacity is 3500 t/d (145 t/h). It adopts an integrated process of "triple-effect forced circulation + DTB fractional crystallization + mother liquor enrichment and incineration," with steam consumption ≤0.25 t/t water, Na₂SO₄ purity ≥99%, RD residue calorific value recovery, and zero wastewater discharge, making it the world's largest zero-discharge RD wastewater treatment plant.

The 10t/h triple-effect sodium chloride evaporator is a continuous evaporation system specifically developed by Conqinphi for the rubber additives industry. It is suitable for high-NaCl mother liquor generated during the production of accelerators M, DM, and NS. The system has an evaporation capacity of 10t/h (240t/d) and employs a "triple-effect cross-flow + forced circulation + DTB crystallization" process. Steam consumption is ≤0.25t/t water, NaCl crystal purity is ≥99%, and whiteness is ≥85, making it directly usable as a feedstock for ion-exchange membrane caustic soda.

Based on steam price of 180 yuan/t and electricity price of 0.65 yuan/kWh, the four-effect compressor saves approximately 11 million yuan annually in steam costs; resource utilization of miscellaneous salts generates an additional 9 million yuan annually. Carbon reduction per ton of water is 0.32tCO₂, resulting in a total annual emission reduction of 48,000 tons.

220t/d Rubber Additives DZ Wastewater Triple-Effect Evaporator – Zero Discharge of High-Concentration Salt-Containing Organic Wastewater

The 250t/d rubber additive CBC water triple-effect evaporation crystallization system, with "pretreatment-triple-effect...

This case fully demonstrates the high efficiency, stability, and...