公开(公告)号：US20210379550A1

公开(公告)日：2021-12-09

申请号：US17286825

申请日：2020-04-20

Applicant: ZHEJIANG SCI-TECH UNIVERSITY

Inventor： Haozhe JIN ,  Guofu OU ,  Zhichao FAN ,  Yong GU ,  Qun WANG ,  Chao WANG

IPC: B01J19/00 ,  G06F17/18 ,  B01J8/04

Abstract: A water injection method for a PID control-based adaptive intelligent water injection system is provided. The system includes a water injection portion, a power portion, a control portion, and a measurement and transmission portion. The water injection portion includes a hydrogenation reactor, heat exchangers, air coolers, and a separation tank. The power portion includes a motor and a water pump. The control portion includes a console and a bus. Temperature, pressure and flow velocity transmitters are additionally arranged at each of inlet and outlet pipes of various heat exchangers, and water injection points are disposed. Temperature, pressure and flow velocity signals of the inlet and outlet pipes of heat exchange devices are monitored, and the console performs error analysis on the three signals and uses a PID control algorithm to control the adjustment valve to alter the valve opening degree to adjust the water injection amount in real time.

公开(公告)号：US20240230254A1

公开(公告)日：2024-07-11

申请号：US18559565

申请日：2022-04-26

Applicant: ZHEJIANG SCI-TECH UNIVERSITY

Inventor： Haozhe JIN ,  Guofu OU ,  Jianping KUANG ,  Xueyong LI ,  Zuchao ZHU ,  Dexiao FU ,  Shumeng XIAO

IPC: F28G7/00 ,  F28G15/00 ,  G01J5/00 ,  G01J5/48

CPC classification number: F28G7/00 ,  F28G15/003 ,  G01J2005/0077 ,  G01J5/485

Abstract: Disclosed is a method for identifying and eliminating ammonium salt deposition characteristics in a pipe of a hydrogenation air cooler. A multiphase flow medium enters an inlet pipe box of a hydrogenation air cooler; cross sections and temperature transmitters are arranged on a pipe bundle of the air cooler in the axial direction; a temperature signal value is monitored and transmitted to a single-chip microcomputer for analysis; an infrared thermal imager performs photographing, and transmits data to determine that an ammonium salt deposition risk is present under this working condition; a monitored temperature value is calculated, an ammonium salt deposition risk identification model is established, and ammonium salt deposits are peeled off from the inner wall of the pipe bundle of the air cooler by means of vibration of the pipe bundle caused by the intermittent frequent switching-on/switching-off of an electromagnet and a magnetic block, and ultrasonic signals.

公开(公告)号：US20240240725A1

公开(公告)日：2024-07-18

申请号：US18559564

申请日：2021-12-27

Applicant: ZHEJIANG SCI-TECH UNIVERSITY

Inventor： Haozhe JIN ,  Guofu OU ,  Zuchao ZHU ,  Chao WANG

IPC: F16K25/04 ,  G05D9/12

CPC classification number: F16K25/04 ,  G05D9/12

Abstract: A method for predicting, regulating and controlling a wear characteristic of a flow channel in a valve. The method comprises: pasting an aluminum sheet in a valve core, and testing a wear rate; regulating inlet pressure, and obtaining distribution characteristics of a pressure field and a velocity field; establishing an association relationship between the wear rate and pressure and a flow velocity; increasing the inlet pressure, and drawing a discrete data curve and a continuous curve; obtaining a discrete data change curve and a continuous curve of the wear rate along with an opening degree of the valve core; obtaining an association relationship graph between the wear rate of the aluminum sheet and the inlet pressure and the opening degree of the valve core; and performing comparison and determination on a real-time wear rate actual value of the aluminum sheet and a critical wear rate value.