Ship SCR control system

Abstract

The invention discloses a ship SCR control system. The ship SCR control system comprises a ship SCR spraying controller, an exhaust temperature sensor, a nitrogen-oxygen sensor, a proportional valve,a urea spray gun, a safety controller, an atmosphere bypass valve, an SCR front bypass valve, an SCR rear bypass valve, a differential pressure transducer and an ash blowing valve. The ship SCR spraying controller is used for calculating the initial spraying amount by calling the calibrated MAP spraying amount according to the information including the exhaust temperature collected by the exhausttemperature sensor, previous-later nitrogen-oxygen sensor values and engine rotation speed oil consumption, work of the proportional valve and the urea spray gun is controlled, and PID initial spraying amount correcting is conducted in real time according to the actual conversion efficiency previously and later fed back by the nitrogen-oxygen sensor. According to the ship SCR control system, the spraying amount can be flexibly calculated, and the nitrogen-oxygen treatment requirement can be met in a long-acting manner, a ship SCR system can be automatically monitored, and manpower is reduced;automatic ash blowing can be achieved according to actual conditions; and a touch display screen is adopted, and visual display of the information and manual control of related functions are facilitated.

Description

technical field [0001] The invention relates to the field of SCR control, in particular to a marine SCR control system. Background technique [0002] According to the amendment to MAPOL Appendix VI adopted by the International Maritime Organization (IMO) in October 2008, the amendment requires that the emission requirements of marine diesel engines built on or after January 1, 2016 must meet the Tier III standard. Adding exhaust gas treatment devices is the most effective control method. However, due to the large size and high exhaust gas of the ship engine, in the event of a problem with the SCR system catalyst or components, the normal operation of the marine SCR system cannot be guaranteed, which needs to be solved urgently; moreover, the injection volume cannot be flexibly calculated, and the nitrogen and oxygen cannot be satisfied for a long time. Process requests. Contents of the invention [0003] The purpose of the present invention is to solve the problems menti...

AI Technical Summary

Problems solved by technology

However, due to the large size and high exhaust gas of the ship engine, in the event of a problem with the SCR system catalyst or components, the normal operation of the marine SCR system cannot be guaranteed, which needs to be solved urgently; moreover, the injection volume cannot be flexibly calculated, and the nitrogen and oxygen cannot be satisfied for a long time. processing request

Images