SCR temperature control system
A technology of temperature control system and control valve, which is applied in the direction of electronic control, exhaust gas treatment, mechanical equipment, etc. of exhaust gas treatment device, which can solve the problems of inoperable SCR system, freezing of reducing agent, etc. The effect of small quantity and simple system structure
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[0030] Take the pneumatic urea injection system as an example, such as figure 1 As shown, the SCR temperature control system includes a control unit, an electric control circuit 3, a heater 5 installed on the urea pipeline 7, a urea injection solenoid valve 6, a coolant solenoid valve 4, and a temperature sensor 2 and pressure installed on the urea tank The sensor 1 and the control unit respectively communicate with the urea pipeline heater 5, the urea injection solenoid valve 6, the coolant solenoid valve 4, the temperature sensor 2 and the pressure sensor 1 through the electronic control circuit 3.
[0031] The SCR temperature control system also includes a triple solenoid valve 8 arranged on the gas pipeline 9. The gas pipeline 9 includes a gas one, a gas two and a gas three; one end of the gas one is connected to the gas source 10, and the other end passes through the triple solenoid The air valve a in the valve 8 is connected to the urea tank; one end of the second gas path i...
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