Recently, Kelansu has been carrying out the “aftermarket nationwide†campaign. The first station “Hubeixing†has entered the China Post Hubei Corporation to maintain and maintain the SCR system of the Guosi Vehicle. The professional after-sales team has won the praise of the customers for five stars.
The first stop of the National Collins Line came to Hubei Post
The urea nozzle is one of the core components of the SCR system. It is used to inject the air delivered by the metering jet pump and the AdBlue mixture of urea solution into the exhaust pipe to atomize and evaporate the liquid and uniformly mix with the exhaust gas.
SCR system common problems and solutions
SCR urea injection system fouling: urea solution in the use of SCR system, the production of sediment has been a relatively common problem. The reasons were analyzed as follows: different reactions of urea aqueous solution at various temperature zones during the spraying process; poor atomization performance of the injection system caused a decrease in the catalytic conversion effect to cause unconverted polymerization of isocyanic acid; SCR system piping and mixer design was not reasonable, and the probability of collision was Excessively large deposits cause localized deposits; the possibility of side reactions in the catalytic reduction caused by catalyst aging increases. Problem caused by scaling of SCR injection system.
Urea nozzle detail disassembly diagram
When urea aqueous solution is used in the SCR system, deposits are generated due to the effect of heat and atomization, resulting in clogging. After plugging, it will cause the following problems:
1. SCR system alarm, light, and the meter will display "Unqualified urea solution, exhaust emissions are not up to standard;"
2. The vehicle power is reduced and the fuel consumption is increased;
3. The pipeline is blocked, the deposition area is rusted, the catalyst channel is blocked, and finally the SCR system fails;
4. Replace the nozzle and increase the cost.
Solution: Dissolve urea deposits with soluble solution. If the normal operation of the SCR system is not damaged, you can solve problems such as clogging of urea nozzles and fouling of pipes.
1. Analyze the urea solution fouling sample.
2. According to urea agglomeration, a urea scale cleaning agent was designed and developed to effectively dissolve scale samples and solve the problem of urea scaling.
SCR nozzle cleaner
Product features: This product has excellent permeability, rapid penetration into the hard dirt inside, improve cleaning efficiency; can effectively dissolve and remove the SCR system urea aqueous solution nozzle long-term deposition of hard grain, restore the nozzle spray effect; non-phosphorus And nitrites, with excellent anti-corrosion, anti-rust performance, while cleaning nozzles without causing damage to metal parts.
Usage: The spray nozzle of the cleaning agent is sprayed on the scale. The cleaning agent should retain a certain reaction time at the scale. If the scale is thick and hard, it can be repeatedly sprayed and cleaned until the cleaning is complete.
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