Blow-down control method for prefilter in dryer as well as structure and dryer

• Main Authors: YE RONG, LIU BO, GUO HUIJIAN, XIE CHENGKUN, YU SHUANGJIE
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2017
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses a blow-down control method for a prefilter in a dryer. The method is characterized by comprising the following steps: mounting a gas-controlled two-way valve on a blow-off pipe of the prefilter, performing blow-down control on the prefilter by using the gas-controlled two-way valve, enabling the gas-controlled two-way valve to be communicated with a residual regeneration tower gas discharge end of an adsorptive dryer, enabling residual gases discharged before a regeneration reaction of the regeneration tower to enter the gas-controlled two-way valve, opening the gas-controlled two-way valve, starting blow-down of the prefilter, automatically closing the gas-controlled two-way valve along with decrease of the gas pressure, and ending the blow-down of the prefilter, thereby realizing blow-down control of the prefilter. According to the operation principle of the adsorptive dryer, the blow-down control method of the prefilter is designed by combining with the blow-down requirements of the