It is consisted of one circulating water basin, water supply pump for circulating water, water treatment system, circulating water filter etc. The circulating water pump outlet pressure is displayed and alarmed intensively by the computer. Circulating water pump A is the main pump, B is assisting pump and its power is 25% of A and only used in summer. This unique design has resolved water supply peak in summer, and also save the power in spring, autumn and winter.  

The pH adjustment unit is to stabilize the pH value, homogenize the product and fine-tune the specifications when producing SLES and SLS.   When the finished product enters the adjustment unit and reaches a certain liquid level, the agitator will stir at a constant speed at the set rpm. Generally, this unit is equipped with multiple stirring tanks and works intermittently.   During the operation of the unit, controlling and testing is required to take samples at regular intervals to check parameters such as product neutralization value, pH, free oil, dioxane, color, etc. When the product quality is stabilized, it will be delivered to the tank farm.   In addition, an optional post deaeration system can be added in order to remove excess air bubbles from the adjusted products, resulting in a more transparent and better looking product.

WEIXIAN provides turnkey plant for LABSA-Na, AOS and SLS drying. Depending on the properties and customer’s requirements, we can provide two types of process: film-scraping and spaying. Please contact us for details.

The sulfuric acid plant and sulphonation plant share a common sulfur melting system. After sulfur melting, the sulfur is transported to the sulfur burning furnace through a sulfur pump and burned with dry air. The dry air is dehumidified by 98% sulfuric acid in the drying absorption tower, achieving a dew point of minus 40 degrees. Then, the main blower sends the dry air to the sulfur furnace for combustion.   After combustion, SO2 is converted once through a conversion tower to produce SO3 gas. Afterwards, SO3 is absorbed by 98% sulfuric acid in the primary absorption tower, and the exhaust gas after absorption returns to the secondary conversion. The heat from the primary conversion will be transferred to the exhaust gas from the second conversion, and after the second conversion, the conversion rate can reach 99.98%. Afterwards, SO3 undergoes secondary absorption, and the exhaust gas undergoes alkaline washing in the scrubber before finally being discharged into the atmosphere. In the early stages of start-up, the scrubber will operate at full capacity to absorb a larger amount of sulfur dioxide from the initial start-up. Under normal operation, qualified discharge can be achieved without passing through the scrubber. The exhaust gas can meet the emission standards in any country under any operating conditions.   The process for energy recovery mainly involves using fire-tube boilers to recover the combustion heat generated by sulfur combustion, as well as the reaction heat generated by the first part and secondary conversions of the converter, and generate steam. Steam can be used for sulfur melting in sulfuric acid and sulphonation plants. Meanwhile, a portion of the steam can also be used for lithium bromide refrigeration in sulphonation units. The remaining steam can be used in other nearby unites. The total heat recovery rate will reach over 80%.