Catalytic purifier selective reduction ultrasonic vaporization method acting on tail gas purification

A catalytic converter and tail gas purification technology, which is applied to the electronic control of exhaust treatment devices, exhaust treatment, exhaust devices, etc., to achieve the effect of improving the uniformity of mixing and improving the catalytic conversion rate

Inactive Publication Date: 2018-11-20
刘光文 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a selective reduction ultrasonic vaporization method for catalytic purifiers acting on exhaust gas purification, so as to solve the problem that the existing spray atomization of urea can only be realized by high-precision nozzles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Connect the power supply of the engine or car battery to the electronic control PLC to provide power, and the electronic control PLC supplies power to the PID. The temperature sensor on the catalytic muffler purifier sets the emission national standard temperature value and provides the CAN signal to the PID. The PID controls the entire rear Handle the circulatory system, the system starts to run after power on;

[0014] (2) Connect compressed air to the Tianlan tank, depressurize through the pressure-reducing solenoid valve and pressure controller to form a micro-pressure, and input the urea liquid into the ultrasonic atomization studio through the pipeline; the ultrasonic atomization studio is designed with a twist cap or The cover is fastened by screws, and a liquid level controller, an ultrasonic atomizer, and a flow meter are installed inside;

[0015] (3) The urea liquid is ultrasonically atomized in the ultrasonic atomization studio and enters the catalytic n...

Embodiment 2

[0018] (1) Connect the external power supply of the kiln to the electric control PLC to provide power, and the electric control PLC supplies power to the PID. The temperature sensor on the catalytic muffler purifier sets the discharge national standard temperature value and provides the CAN signal to the PID. The PID controls the entire rear Handle the circulatory system, the system starts to run after power on;

[0019] Step (2), step (3) and step (4) are implemented according to the rest of the steps in Example 1, and finally the whole system is realized by changing the PLC into an electronic control integrated circuit and software numerical control, replacing the existing post-processing system of the kiln, Provide the required CAN signal to access the furnace ECU.

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PUM

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Abstract

The invention discloses a catalytic purifier selective reduction ultrasonic vaporization method acting on tail gas purification. An external power source is connected into an electric control PLC, theelectric control PLC supplies power to a PID, and the PID controls an entire post-processing circulation system. Compressed air is led into an AdBlue tank to form micro-pressure, urea liquid is fed into an ultrasonic atomization working chamber, and the urea liquid is ultrasonically atomized and then enters a catalytic muffler purifier through a pipeline. Urea is detected by a nitrogen oxygen sensor so as to obtain the conversion rate of converting to the nitrogen oxide PPM value, the conversion rate is transmitted to the PID through a CAN signal, the PID calculates the amount of atomized urea required to obtain the nitrogen oxide PPM value, the current voltage value of MOS is obtained, the MOS controls an ultrasonic atomization generator to convert the urea liquid into atomized urea, theatomized urea is fed into the catalytic muffler purifier, and the whole process forms a CAN signal cycle. According to the catalytic purifier selective reduction ultrasonic vaporization method actingon the tail gas purification, the urea liquid is converted into the atomized urea through ultrasonic waves, the use of a high-precision nozzle is abandoned, and the problem of urea crystallization isfurther solved.

Description

technical field [0001] The invention relates to a catalytic purifier selective reduction ultrasonic vaporization method for exhaust gas purification, and belongs to the technical field of exhaust gas post-treatment. Background technique [0002] Catalytic muffler is a key component used in engines with exhaust gas, automobile engines or industrial kilns. It is also an important component to ensure that exhaust emissions meet the requirements of national environmental protection regulations. Oxidation and reduction reactions are carried out by the catalyst in the converter, and the harmless gas is discharged into the air. In this process, the participation of ammonia gas is necessary to convert carbon monoxide, hydrocarbons, nitrogen oxides, and lead compounds in the tail gas into water and harmless gases, and the form of ammonia participation is transformed by urea. The urea solution is sprayed and atomized through the urea nozzle, and the atomized urea mist forms extremely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N9/00F27D17/00
CPCF01N3/2066F01N9/00F01N2610/146F01N2610/1486F27D17/008Y02T10/40
Inventor 刘柳成林刘光文吴斌刘建禹吴勇席志宏杨晓桐
Owner 刘光文
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