In the chemical pulping process, cooking liquor (spent liquor) that is separated from the washed stock goes through an evaporation process to form black liquor. The black liquor becomes fuel for the recover boiler. The resulting furnace smelt is dissolved to form green liquor. After a clarification process (removal of insoluble material,) the green liquor is fed into a lime slaker where it mixes and reacts with lime. White liquor is produced, which in turn is used in the pulp cooking process. The reaction in the slaker takes place at temperatures around 185- 195°F. Overheating of green liquor does not improve causticizing reaction efficiency and presents the risk of boil over.
Flow Rate: 503-647 GPM Temperature Rise: 20°F Discharge Temperature: 185°F Steam Pressure: 150 PSIG Green Liquor Pressure: 35 PSIG Required Steam Flow: 4,323-5,564 lbs/hr
The Pick Model 6X75-3 Constant Flow Heater was selected for added capacity. The Pick Heater can automatically adapt to changes of incoming liquor temperature. The heater was provided in 316L grade stainless steel to better handle caustic green liquor. The mill DCS controlled the discharge temperature of the heater.
• Smooth, Quiet Performance • Precise Temperature Control
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Dear Partners,
We understand the operational challenges many companies are faced with during this extraordinary time, and want to assure you that we are open for business. Under Wisconsin’s Emergency Order No. 12, section 13 and guidelines released by CISA, Pick Heaters, Inc is considered an essential business that is part of the critical infrastructure workforce and our employees are essential workers. We supply critical equipment to key process industries including food, chemical, pharmaceutical and energy utilities to name a few. We are taking all necessary precautions and continue to follow CDC guidelines for our employees to ensure their safety in addition to the safety of our customers and vendors.
We thank you for your support, commitment and partnership during this critical time.
Office of the President - Pick Heaters, Inc
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