CN105240090A

CN105240090A - Technique method used for removing automobile tail gas particles

Info

Publication number: CN105240090A
Application number: CN201510709397.6A
Authority: CN
Inventors: 吴云
Original assignee: Chongqing Technology and Business University
Current assignee: Chongqing Technology and Business University
Priority date: 2015-10-28
Filing date: 2015-10-28
Publication date: 2016-01-13
Anticipated expiration: 2035-10-28
Also published as: CN105240090B

Abstract

The invention discloses a technique method used for removing automobile tail gas particles. According to the method, the electrostatic precipitation technology serves as the main technique means, the method can be used for removing tiny particles existing in automobile tail gas, and a very good removing effect can be achieved particularly for PM2.5 type particles. Due to the fact that compared with other particle capturing technologies, an adsorbent or a catalyst is not needed in the electrostatic precipitation technology, the adaptability to the smoke components is high, and no special requirement for the sulphur content of fuel does not exist; and meanwhile the problem of increasing of exhaust resistance due to blockage of the adsorbent caused by accumulation of the particles is avoided. System running is relatively stable. The technique method has the beneficial effects of being efficient in running, low in manufacturing cost, high in adaptability and the like, the problems of a current tail gas particle purifying system in the actual using process can be reduced or eliminated, the actual application threshold is lowered, and the technique method can serve as a main technique means for commercial application and popularization.

Description

A kind of technological method for removing Vehicle Exhaust Particulate

Technical field

The invention belongs to motor vehicle exhaust emission Environmental capacity and air pollution treatment field, its technology contents relates to a kind of comprehensive solution that can be used for removing particulate pollutant in vehicle exhaust.

Background technique

In recent years since, haze weather occurs repeatedly in each big city of China, causes the arch-criminal of this problem to be exactly particulate pollutant (PM) in air.In general, particulate pollutant can be divided into the different rating-type such as PM10, PM2.5, PM1, PM0.5 according to its diameter.Wherein, PM2.5 pellet is comparatively large because of its quantity, is the Dominant particle pollutant causing atmospheric haze and respiratory disease.In numerous airborne particulates emission sources, motor vehicle exhaust emission is one of of paramount importance discharge source, particularly along with the develop rapidly of national economy and the quick raising of living standards of the people, the recoverable amount of automobile rises rapidly, and motor vehicle exhaust emission pollution problem is also day by day serious.Research shows, the Vehicle Exhaust Particulate be discharged in air not only can cause atmospheric haze, also can make a very bad impression to respiratory system etc., serious harm health.

Generally speaking, the method that essence reduces Vehicle Exhaust Particulate discharge mainly contains two kinds, and one is combustion quality by improving fuel and finds more clean alternative fuel and reach the object of emissions reduction; Two is by improveing motor car engine, to improve the combustion efficiency of fuel, thus reduces exhaust emissions particulate matter.But be no matter the raising of fuel quality, the research and development of alternative fuel, or the improvement of motor, all need human and material resources and the time of at substantial, be all difficult in a short time solve motor vehicle exhaust emission Problems existing.And for the vehicle run at present, the method that its exhaust emissions problem can not be improved by motor is solved.Just because of this, vehicle exhaust particulate burning purifying device because its technique process is simple, simple installation, purifying effect significantly and vehicle exhaust particulate emission problem can be solved in a short time and be subject to each side and pay attention to.

But, vehicle exhaust particulate pollutant is purified, current known technological method adopts to carry out based on absorption-combustion principle " particle trap ", although the method has the advantage such as simple installation, Be very effective, also there is exhaust emissions resistance large, adsorption layer easily blocks, combustion process impact runs, expensive catalyst, requires high a series of defect to fuel sulfur content, causes it still cannot be able to large-scale promotion application.Possessing to make automobile tail gas purification system runs efficiently, cheap, the features such as strong adaptability, really meet the needs of large-scale promotion application, the present invention is directed to the deficiency that existing vehicle exhaust particulate burning purifying technology exists, adopt Promethean technical solution, construct a kind of vehicle exhaust particle removal system, large with the exhaust emissions resistance solving the existence of existing vehicle exhaust particulate burning purifying technology, adsorption layer easily blocks, the impact of burning deashing process runs, involve great expense, the problems such as high are required to fuel sulfur content, make it have and run efficiently, cheap, the features such as strong adaptability, thus reduce or eliminate exhaust particulate cleaning system Problems existing in actual use, reduce its practical application threshold, reach the requirement that large-scale commercial is applied.

Summary of the invention

In order to overcome deficiency and the problem of the existence of existing vehicle exhaust particulate burning purifying technology, the invention provides a kind of Technical Solving for removing Vehicle Exhaust Particulate.The method has the features such as operation is efficient, operational outfit cost relative moderate, strong adaptability, be very suitable for the technical solution as Vehicle Exhaust Particulate purifier, this technical solution is once implement, to likely solve the problem in the past existing for vehicle exhaust particulate burning purifying device, make this technology be able to large-scale promotion application rapidly, thus produce good trade benefit and social benefit.

The technical solution adopted for the present invention to solve the technical problems is: (1) take electrostatic precipitator technology as technical way, for removing the finely ground particles existed in vehicle exhaust.Due to compared to other particle capture technology, electrostatic precipitator technology need not use sorbent and catalyzer, therefore it is to the strong adaptability of smoke components, to fuel sulfur content without particular/special requirement, and sorbent obstruction can not be produced because of the accumulation of particulate matter, cause the problems such as exhaust emissions resistance increase, system cloud gray model is relatively stable, can be used as the technical way removing vehicle exhaust particle.(2) remove the power supply source of system using portable generator as vehicle exhaust particle electrification, and adopt silicon rectifying transformer low-voltage AC to be converted to the high voltage direct current of 15 ~ 20kv.(3) exhaust knock out drum is set, to slow down vehicle exhaust flowing velocity, increases the tail gas waiting time in the electric field, particulate matter is caught by dust collector pole more, thus improve removal efficiency.(4) be wound around electric-heating-wire-heating outward at dust collecting pole plate to burn to particle, the particulate matter after burning is converted into the gases such as carbon dioxide and carries out clean discharge.

The technical characteristics that the present invention has is: (1) is compared with existing exhaust particulate thing removal technology, whole particulate matter is removed process and is not adopted suction type and catalytic combustion mode, sorbent and catalyzer need not be used, the high cost problem that blocking, fuel oil bad adaptability and expensive catalyst cause can be avoided.(2) exhaust damping device is provided with, reduce exhaust gas flow speed, add the waiting time of flue gas in electrostatic field, enable particulate matter in flue gas fully charged, and make electrically charged particle between two-plate, have sufficient traveling time, particulate matter is captured as much as possible, thus improves removal efficiency.(3) be provided with electric-heating-wire-heating in the old pole of receipts, with the dust collector pole particulate matter that burns, the impact that dust collector pole focusing particles crosses multipair electric field strength can be reduced on the one hand, particulate matter can be made to be converted into gas on the other hand and carry out harmless discharge.

Embodiment

1, the electric field control of dust part of vehicle exhaust particle electrification removal system is made up of silicon rectifying transformer, tubular type barb cathode ray, metal anode powder collection plate and outer insulator, the low voltage transition transmitted by automobile current generator by silicon rectifier is that 15 ~ 20kv high-tension electricity produces corona to make cathode line, after exhaust particulate is charged in the electric field, under electric field force effect, anode moves and is captured, due to high voltage electric field, therefore device outside need seal by wrapped with insulation, with anticreep.

2, vehicle exhaust particle electrification removal system flue gas buffer portion is made up of an oval knock out drum, and knock out drum material is metal material, and its suction port is connected with outlet pipe, and air outlet is divided with electric field dust collecting section and is connected.

3, the burning of vehicle exhaust particle electrification removal system particles thing is realized by electric-heating-wire-heating mode, wherein, dust collector pole burning particulate matter is by being wound in the electric-heating-wire-heating of positive plate periphery, negative electrode firing unit is then made up of the metal sleeve be enclosed within cathode line and the electric heating wire be wrapped on sleeve, when electric heating wire by heating temperatures to more than 800 DEG C time, particulate matter can burning conversion be gas, electric heating wire required electric power still comes from portable generator, and adopts interruptedly supplying power mode burning particles thing by controller.

4, electric field dust collect plant adopts multiple horizontal cylindrical tube as dust collector pole, each cylindrical shell intermediate arrangement cathode line, wherein cathode line is 20 ~ 30mm to the spacing of barrel, the tail gas flowed out from knock out drum enters each cylindrical shell respectively after shunt conduit shunting, and electrical heating wire is then wrapped in cylinder body outer wall.

5, whole particulate matter remove system be one long be 20 ~ 30cm, diameter is the cylindrical integral of 10 ~ 15cm, directly can be connected with vehicle-exhaust exhaust pipe, so that install.

Claims

1. the present invention relates to a kind of technological method for removing Vehicle Exhaust Particulate, the technical characteristics of the method comprises following content:

(1) the electric field control of dust part of vehicle exhaust particle electrification removal system is made up of silicon rectifying transformer, tubular type barb cathode ray, metal anode particle dust collector pole and outer insulator, by silicon rectifier, the low tension that automobile current generator transmits is converted to 15 ~ 20kv high-tension electricity and produces corona to make cathode line, after exhaust particulate is charged in the electric field, under electric field force effect, anode moves and is captured, due to high voltage electric field, therefore device outside need seal by wrapped with insulation, with anticreep;

(2) vehicle exhaust particle electrification removal system flue gas buffer portion is made up of an oval knock out drum, and knock out drum material is metal material, and its suction port is connected with outlet pipe, and air outlet is divided with electric field dust collecting section and is connected;

(3) burning of vehicle exhaust particle electrification removal system particles thing is realized by electric-heating-wire-heating mode, wherein, dust collector pole burning particulate matter is by being wound in the electric-heating-wire-heating of positive plate periphery, negative electrode firing unit is then made up of the metal sleeve be enclosed within cathode line and the electric heating wire be wrapped on sleeve, when electric heating wire by heating temperatures to more than 800 DEG C time, particulate matter can burning conversion be gas, electric heating wire required electric power still comes from portable generator, and adopts interruptedly supplying power mode burning particles thing by controller;

(4) electric field dust collect plant adopts multiple horizontal cylindrical tube as dust collector pole, each cylindrical shell intermediate arrangement cathode line, wherein cathode line is 20 ~ 30mm to the spacing of barrel, the tail gas flowed out from knock out drum enters each cylindrical shell respectively after shunt conduit shunting, and electrical heating wire is then wrapped in cylinder body outer wall;

(5) whole particulate matter remove system be one long be 20 ~ 30cm, diameter is the cylindrical integral of 10 ~ 15cm, directly can be connected with vehicle-exhaust exhaust pipe, so that install.