CN105587381A

CN105587381A - Tail gas purifying and silencing device for engine

Info

Publication number: CN105587381A
Application number: CN201510679053.5A
Authority: CN
Inventors: 李建坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-11
Filing date: 2015-10-11
Publication date: 2016-05-18

Abstract

The invention discloses a tail gas purifying and silencing device for an engine. The tail gas purifying and silencing device for the engine is composed of a front cavity, a rear cavity, a front copper sponge, a filter tank and a rear copper sponge, wherein one end of the front cavity is provided with a lap joint flange, and the other end of the front cavity is provided with a fixed flange; one end of the rear cavity is provided with a lap joint flange, and the other end of the rear cavity is provided with a fixed flange; the front copper sponge, the filter tank and the rear copper sponge are sequentially arranged in a cavity body. The front cavity and the rear cavity are connected through bolts and nuts in bolt holes of paired flanges. A sealing washer is arranged between the paired flanges for achieving sealing. The lap joint flanges at one end of the front cavity and one end of the rear cavity and paired fixed flanges of an exhaust pipe body are fastened by means of bolts and nuts, so that the device is connected with the exhaust pipe body. The filter tank is composed of a tank body, a tank cover, rock wool layers and active carbon layers, wherein the rock wool layers and the active carbon layers are installed in the tank body and alternately arranged in an overlapping mode. A plurality of air holes are distributed in the bottom of the tank body and in the tank cover. The surface of each copper sponge is coated with a three-way catalyst coating, so that the copper sponge has the effect of a three-way catalyst, and meanwhile, the noise lowering effect is achieved. Through the excellent filtering performance, adsorption performance and high-temperature reduction chemical performance of active carbon, PM pollutants, fuel residues and the like in tail gas of the engine can be effectively adsorbed, nitrogen oxides are effectively decomposed, tail gas flow impact is absorbed, and a remarkable silencing effect is achieved.

Description

A kind of engine tail gas purification and silencing means

Technical field

Follow the extensive universal of automobile, in bringing convenience to people's life, vehicle exhaust is day by day serious to the pollution of atmospheric environment, and the noise pollution that automobile causes also constantly increases, bring serious infringement to people's physical and mental health, the serious problem that how to reduce that tail gas pollution and noise pollution become that people face and challenge.

Background technology

For petrol engine, traditional engine tail gas purification and noise reduction method are the methods by three-way catalytic apparatus and muffler are installed at the exhaust pipe of engine. The catalyst coat of three-way catalytic apparatus by cartridge surface decomposes the pollutants such as nitrogen oxide in motor exhaust, hydrocarbon, carbon monoxide, and muffler is to be changed tail gas direction, the mode that cushions cavity is set reduces noise by dividing plate.

For Diesel engine, because pollution problem is even more serious, a kind of technology is to adopt EGR (EGR Technology) and DPF (filtration of contaminated by diesel oil composition granule) technology to control pollutant emission; Another kind of technology is to adopt urea liquid sprinkling technology, utilizes ammonia heating to be decomposed into nitrogen and hydrogen, utilizes the reduction characteristic of hydrogen to control the discharge of nitrogen oxide, and muffler adopts identical structure with petrol engine.

For for petrol engine, three-way catalytic apparatus is higher for the quality requirements of gasoline, be easy to be polluted and reduce usefulness or inefficacy, clean-up effect for harmful substances such as the heavy metals in oil product is not remarkable, especially pollute for PM (particle), clean-up effect is very poor. In muffler, metal partion (metp) and muffler metal shell adopt welding procedure formation to be rigidly connected, the vibrations that can not effectively eliminate motor exhaust to impact and to produce, thereby, erasure effect is not remarkable, another kind of exhaust pipe of engine muffler structure is radially to process multiple apertures in blast pipe one segment length, aperture outer wrap acoustical cotton, acoustical cotton is outside with the sealing of sheet metal cavity, this kind of structure can absorb a certain amount of tail gas and impact and shake, but be unimpeded because blast pipe is middle, exhaust resistance minimum, therefore, erasure effect is very limited.

For Diesel engine; because entering partial tail gas to combustion chamber, egr system reduces ignition temperature to realize the reduction of discharging of nitrogen oxide; directly cause the imperfect combustion of fuel, not only reduce fuel efficiency, and can discharge a large amount of carbon powder particles; while utilizing DPF system to filter these carbon powder particles; can cause carbon powder particle to gather, thereby need extra fuel oil injection and ignition system to burn these carbon dusts, not only cost is high; equally also cause waste of fuel, for PM pollutant, control produces little effect. Spray technology for urea liquid, because needs increase urea liquid storage facility, and want regular replenishment urea liquid, not only increase and use car cost, bring a lot of inconvenience yet, for PM pollutant, control does not almost have effect.

In sum, not only cost is high for existing tail gas clean-up technology, poor reliability, and fuel economy is low, and for PM pollutant and noise control, effect is all very limited.

Summary of the invention

Patent of the present invention is a solution proposing in order to address the above problem.

Patent of the present invention is installed on the position of exhaust pipe of engine leading portion ternary catalyzing unit, formed by the forward and backward cavity of one end band lap joint flange, other end band mounting flange, front copper sponge, filter tank, the rear copper sponge that order packs cavity into, forward and backward cavity connects by the screw bolt and nut in companion flange flange hole, between companion flange, there is seal washer to realize sealing, mounting flange by the lap joint flange at forward and backward cavity two ends and the pairing of engine exhaust body utilizes screw bolt and nut fastening, and realization is connected with engine exhaust body. filter tank is made up of tank body, cover and the rock wool layer being alternately arranged under the overlay and the active carbon layer that are contained in tank body, tank base and cover are distributed with multiple passages, copper sponge surface is coated with three-way catalyst coating, when tail gas passes through the space of copper sponge, three-way catalyst can decomposed tail gas in the dusty gas such as nitrogen oxide, hydrocarbon, carbon monoxide, play the effect of ternary catalyzing unit, have simultaneously tail gas air-flow is converted into micro-turbulence by small spaces, play the effect of the vibrations that reduce noise, heat radiation, absorption motor exhaust impact initiation, rear copper sponge not only has the effect same with front copper sponge, also has broken the active carbon being caused by the engine vibration particle producing is tackled to function therein, prevents secondary pollution, filter core tank body and filter core cover and with the staggered rock wool layer of active carbon layer be that breakage meanwhile, facilitates filter tank replacing for the activated carbon granule in the middle of protecting avoids the impact of engine vibration. by the good filtration of active carbon and absorption property, carbon powder particle, fuel oil remnants etc. that in filtration and absorption motor exhaust, harmful heavy metallic oxide, sulfide, non-complete combustion of fuel causes, due to the huge surface area of active carbon, can effectively disperse and absorb the impact of tail gas air-flow, therefore, also there is significant erasure effect. the more important thing is, the high temperature of tail gas, the reduction chemical property of anaerobic environment meeting stimulating activity charcoal, nitrogen oxide in tail gas can directly react with the carbon in active carbon, generate harmless nitrogen and carbon dioxide, and high-temperature vapor in tail gas and carbon dioxide and a small amount of oxygen activated carbon particle continuously, make it keep good performance, meeting release hydrogen and carbon monoxide in carbon granule activation process, there is equally good reduction effect for the nitrogen oxide in tail gas, the carbon consuming in this process also can obtain tail gas in continuing of forming after by charcoal absorption of carbon granule supplement, form good positive feedback mechanism, effectively extend the life-span of filter tank, improve tail gas clean-up effect. by activated carbon granule is carried out to zinc salt immersion treatment, can effectively improve the ability of its decomposing nitrogen oxide, by adding diatomite or alumina composition in activated carbon granule process, can effectively improve its intensity and burning-point. when using after certain hour, filter tank active carbon purifying and adsorption capacity reach capacity, and can, by the screw bolt and nut in the forward and backward cavity flange hole of dismounting, be replaced with new filter tank, meanwhile, capable of washing, check forward and backward copper sponge, make it keep good state. filter tank is recyclable, is used as other purposes after professional treatment.

Brief description of the drawings

Accompanying drawing 1: overall structure figure

(1), front lap joint flange, material is carbon steel or stainless steel; (2) connecting bolt and nut, material is carbon steel or stainless steel; (3) front cavity, material is carbon steel or stainless steel; (4) front copper sponge, material is copper; (5) filter tank, describes in detail and sees accompanying drawing 2; (6) rear chamber, material is carbon steel or stainless steel; (7) lap joint flange after, material is carbon steel or stainless steel; (8) connecting bolt and nut, material is carbon steel or stainless steel; (9) copper sponge after, material is copper; (10) connecting bolt and nut, material is carbon steel or stainless steel; (11) seal washer, material is rock wool.

Accompanying drawing 2: filter tank structure chart

(1), filter tank cover, material is carbon steel or stainless steel; Be distributed with multiple little passages; (2) filter tank tank body, material is carbon steel or stainless steel, bottom is distributed with multiple little passages; (3) rock wool layer, material is rock wool; (4) activated carbon granule layer, material is active carbon.

Detailed description of the invention

Be elaborated below in conjunction with Figure of description and embodiment.

With reference to Figure of description 1 and accompanying drawing 2, patent of the present invention is arranged on front cavity (accompanying drawing 1 (3)) left end by front lap joint flange (accompanying drawing 1 (1)), in the cavity being combined into, front copper sponge (accompanying drawing 1 (4)), filter tank (accompanying drawing 1 (5)), rear copper sponge (accompanying drawing 1 (9)) are installed successively between front cavity (accompanying drawing 1 (3)) and rear chamber (accompanying drawing 1 (6)), front cavity (accompanying drawing 1 (3)) is realized fastening and is connected by connecting bolt and nut (accompanying drawing 1 (10)) with rear chamber (accompanying drawing 1 (6)), and realize sealing by seal washer (accompanying drawing 1 (11)), rear lap joint flange (accompanying drawing 1 (7)) is arranged on rear chamber (accompanying drawing 1 (6)) right-hand member, front lap joint flange (accompanying drawing 1 (1)) and rear lap joint flange (accompanying drawing 1 (7)) are realized and being connected of engine exhaust body companion flange by connecting bolt and nut (accompanying drawing 1 (2)) and connecting bolt and nut (accompanying drawing 1 (8)). with reference to accompanying drawing 2, filter tank (accompanying drawing 1 (5)) is by alternately superposeing and pack multilayer rock wool layer (accompanying drawing 2 (3)), activated carbon granule layer (accompanying drawing 2 (4)) in filter tank tank body (accompanying drawing 2 (2)), fixing by filter tank cover (accompanying drawing 2 (1)), at filter tank cover (accompanying drawing 2 (1)) and the multiple passages of filter tank tank body (accompanying drawing 2 (2)) bottom processing, to ensure that exhaust emissions is unobstructed. front copper sponge (accompanying drawing 1 (4)) and rear copper sponge (accompanying drawing 1 (9)) surface are coated with three-way catalyst coating, to realize the purification for pollutants such as nitrogen oxide in tail gas, hydrocarbon and carbon monoxide, activated carbon granule in activated carbon granule layer (accompanying drawing 2 (4)) is through zinc salt immersion treatment, to improve its decomposing nitrogen oxide performance, and in activated carbon granule manufacture process, add diatomite or alumina composition, to improve its intensity and burning-point. when after engine operation certain hour or the certain mileage of Vehicle Driving Cycle, tail gas clean-up and the adsorption capacity of filter tank (accompanying drawing 1 (5)) reach capacity, can be by connecting bolt and the nut (accompanying drawing 1 (10)) between cavity (accompanying drawing 1 (3)) and rear chamber (accompanying drawing 1 (6)) before dismounting, more renew filter tank (accompanying drawing 1 (5)), simultaneously, can clean front copper sponge (accompanying drawing 1 (4)) and rear copper sponge (accompanying drawing 1 (9)), to keep its superperformance, the inefficacy filter tank (accompanying drawing 1 (5)) being replaced can be recycled by professional institution.

Claims

1. an engine tail gas purification and silencing means, it is characterized in that: by one end band lap joint flange, the front cavity of other end band mounting flange, rear chamber, order packs the front copper sponge of cavity into, filter tank, rear copper sponge composition, front cavity, rear chamber connects by the screw bolt and nut in companion flange flange hole, between companion flange, there is seal washer to realize sealing, by front cavity, the mounting flange of the pairing of the lap joint flange at rear chamber two ends and engine exhaust body utilizes screw bolt and nut fastening, realization is connected with engine exhaust body, filter tank is by tank body, cover and the rock wool layer being alternately arranged under the overlay and the active carbon layer that are contained in tank body form, tank base and cover are distributed with multiple passages.

2. a kind of engine tail gas purification as claimed in claim 1 and silencing means, is characterized in that: front copper sponge, rear copper sponge surface are coated with three-way catalyst coating.

3. a kind of engine tail gas purification as claimed in claim 1 and silencing means, is characterized in that: activated carbon granule is carried out to zinc salt immersion treatment.

4. a kind of engine tail gas purification as claimed in claim 1 and silencing means, is characterized in that: in activated carbon granule process, add diatomite or alumina composition.