Nozzle

The exhaust urea post-treatment series mainly revolves around selective catalytic reduction (SCR) technology, which sprays urea solution into the exhaust to convert harmful nitrogen oxides (NOx) into harmless nitrogen (N ₂) and water (H ₂ O), thereby reducing the environmental pollution caused by diesel vehicle exhaust emissions.

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Urea post-treatment accessories series

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Urea post-treatment accessories series

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The exhaust urea post-treatment series mainly revolves around selective catalytic reduction (SCR) technology, which sprays urea solution into the exhaust to convert harmful nitrogen oxides (NOx) into harmless nitrogen (N ₂) and water (H ₂ O), thereby reducing the environmental pollution caused by diesel vehicle exhaust emissions.

Core component

Urea tank:

Used for storing urea solution, usually made of plastic, with a sensor and heater integrated on the top.
The sensor can sense the liquid level height and temperature, while the heater uses the heat from the engine cooling water to defrost and prevent the urea solution from freezing.
The urea tank is usually installed on the same side as the fuel tank, but it needs to be kept at a certain distance to avoid the high temperature of the fuel tank affecting the properties of urea.

Urea pump:

Responsible for establishing pressure on the urea solution so that it can be sprayed into the exhaust pipe through the nozzle.
The pressure building of urea pump needs to meet certain conditions, such as no faults in actuators, sensors, wiring harnesses, etc. that affect the pressure building of urea pump; The exhaust temperature exceeds 180 ℃; Engine speed greater than 550rpm, etc.
After the vehicle is turned off, the urea pump needs to reverse the urea solution in the pipeline and urea pump back into the urea tank to prevent crystallization.

Urea nozzle:

Installed on the exhaust pipe, the urea solution and air mixture sent by the metering injection pump are sprayed downstream into the exhaust pipe, and the sprayed urea solution is uniformly atomized.
The nozzle is an electrical component with poor high temperature resistance and needs to be connected to the engine cooling water pipeline for cooling.

SCR catalytic converter:

It is a place where urea solution and nitrogen oxides in exhaust gas are fully mixed and undergo chemical reactions.
The interior is composed of catalyst, carrier, and encapsulation, with the catalyst evenly applied to the carrier.
The progress of chemical reactions must meet two conditions: first, there must be a catalyst; Secondly, the temperature should be above 200 ℃.

Sensor

Including exhaust temperature sensors, ambient temperature sensors, urea level temperature sensors, NOx sensors, etc.
Used to monitor exhaust temperature, ambient temperature, urea level and temperature, as well as nitrogen oxide emissions in exhaust gas, to ensure the normal operation of the SCR system.

Technical features and advantages

Efficient emission reduction:
SCR technology can effectively reduce nitrogen oxide emissions in diesel vehicle exhaust, meeting strict environmental standards.
This technology can reduce nitrogen oxide emissions by more than 50%, and even achieve a conversion rate of 90%.
Fuel economy:
SCR technology can achieve efficient emission reduction without reducing engine efficiency and has good fuel economy.
High sulfur resistance:
SCR technology requires relatively low sulfur content in fuel and has high sulfur resistance.
Strong adaptability:
SCR technology can be widely applied in the fields of medium and heavy-duty diesel vehicles as well as ships, meeting the emission control needs of different fields.

Product Details

Core component

Urea tank:

Used for storing urea solution, usually made of plastic, with a sensor and heater integrated on the top.
The sensor can sense the liquid level height and temperature, while the heater uses the heat from the engine cooling water to defrost and prevent the urea solution from freezing.
The urea tank is usually installed on the same side as the fuel tank, but it needs to be kept at a certain distance to avoid the high temperature of the fuel tank affecting the properties of urea.

Urea pump:

Responsible for establishing pressure on the urea solution so that it can be sprayed into the exhaust pipe through the nozzle.
The pressure building of urea pump needs to meet certain conditions, such as no faults in actuators, sensors, wiring harnesses, etc. that affect the pressure building of urea pump; The exhaust temperature exceeds 180 ℃; Engine speed greater than 550rpm, etc.
After the vehicle is turned off, the urea pump needs to reverse the urea solution in the pipeline and urea pump back into the urea tank to prevent crystallization.

Urea nozzle:

Installed on the exhaust pipe, the urea solution and air mixture sent by the metering injection pump are sprayed downstream into the exhaust pipe, and the sprayed urea solution is uniformly atomized.
The nozzle is an electrical component with poor high temperature resistance and needs to be connected to the engine cooling water pipeline for cooling.

SCR catalytic converter:

It is a place where urea solution and nitrogen oxides in exhaust gas are fully mixed and undergo chemical reactions.
The interior is composed of catalyst, carrier, and encapsulation, with the catalyst evenly applied to the carrier.
The progress of chemical reactions must meet two conditions: first, there must be a catalyst; Secondly, the temperature should be above 200 ℃.

Sensor

Including exhaust temperature sensors, ambient temperature sensors, urea level temperature sensors, NOx sensors, etc.
Used to monitor exhaust temperature, ambient temperature, urea level and temperature, as well as nitrogen oxide emissions in exhaust gas, to ensure the normal operation of the SCR system.

Technical features and advantages

Efficient emission reduction:
SCR technology can effectively reduce nitrogen oxide emissions in diesel vehicle exhaust, meeting strict environmental standards.
This technology can reduce nitrogen oxide emissions by more than 50%, and even achieve a conversion rate of 90%.
Fuel economy:
SCR technology can achieve efficient emission reduction without reducing engine efficiency and has good fuel economy.
High sulfur resistance:
SCR technology requires relatively low sulfur content in fuel and has high sulfur resistance.
Strong adaptability:
SCR technology can be widely applied in the fields of medium and heavy-duty diesel vehicles as well as ships, meeting the emission control needs of different fields.