CN208073589U - Diesel particulate filter - Google Patents

Abstract

The utility model proposes a kind of diesel particulate filter, air intake duct is provided in the shell, one end of the air intake duct is connected with diesel exhaust gas end, and the other end is seal shape；In the shell, the air intake duct outer surface be arranged with the filter core for adsorption particle object, the electrical heating core for regenerating filter core is provided in the filter core, the filter core is high silica glass block, and the high silica glass block is in corrugated structure, and exhaust outlet is provided on the shell.The utility model is very big using the accessible area of high silica glass block, improves filter efficiency, while the high temperature tolerance degree of high silica glass block can reach 1000 DEG C or more, the requirement of high temperature when can reach regeneration.It is heated evenly in regenerative process, block will not be because of thermal stress damage.The filtering block of the utility model same volume is far below ceramic material using the cost of high silica glass block, and weight is lighter, can mitigate the weight of diesel engine exhaust gas treatment device.

Description

Diesel particulate filter

Technical field

The utility model belongs to tail gas disposal technique field more particularly to a kind of diesel particulate filter.

Background technology

Currently, control engine discharge of poisonous waste is the effective measures of environmental protection, and for diesel engine, particle row Put be Diesel Engine Control two big difficult points.Continuous stringent with environmental regulation, the discharge boundary value of particle is lower and lower, in order to The Particulate Emission of engine is reduced, particulate trap can be used.

Diesel particulate trap (DPF) is a kind of filter in the diesel engine emissions system, it can be with It is captured before Particulate Emission substance enters air.Particulate trap used at present, after a period of use, it may occur that Carbon deposit blocks strainer, is regenerated, and regenerated process is exactly to reduce particle using electrically heated method or using catalyst converter Burning point so that carbon burning is carried out removing carbon.

Common filtering material is mainly ceramic material, including ceramic honey comb and foamed ceramics both at home and abroad.Ceramic material is made For filter, although high temperature resistance is good, high mechanical strength is deposited since its radial and lateral expansion coefficient differs twice Uneven heating is even in regenerative process, and thermal stress damage easily occurs, and particle easily lumps, and it is regenerated scarce to be unfavorable for ignition Point.And due to its special pore passage structure, the cost of the ceramic material of filtration efficiency is also relatively high.

Utility model content

The utility model for the above technical issues, proposes a kind of diesel particulate filter.

In order to achieve the above object, the technical solution adopted in the utility model is：

A kind of diesel particulate filter, including shell are provided with air intake duct, one end of the air intake duct in the shell It is connected with diesel exhaust gas end, the other end is seal shape；In the shell, the air intake duct outer surface is arranged with and is used for The filter core of adsorption particle object, the electrical heating core for regenerating filter core is provided in the filter core, and the filter core is high silica glass Block, the high silica glass block are in corrugated structure, and exhaust outlet is provided on the shell.

Wherein, the corrugated paper structure that filter core is constituted using high silica glass block, since to can contact area very big for it, Easily particulate matter can be adsorbed onto on filter core.The high temperature tolerance degree of high silica glass block can reach 1000 DEG C or more, The requirement of high temperature when can reach regeneration.And high silica glass was regenerated there is no radial and lateral expansion coefficient difference It is heated evenly in journey, block will not be because of thermal stress damage, while having heat accumulation function, avoids externally transmitting higher temperature.

As preferred：The high silica glass block is divided into the flat layer and corrugated layer of interconnection, the flat layer with The corrugated layer, which is sequentially overlapped, to be arranged alternately.To increase the contact area of high silica glass block and diesel engine vent gas.

As preferred：The flat layer and the corrugated layer are perpendicular with the air intake duct.To increase high silica glass The contact area of block and diesel engine vent gas.

As preferred：The filter core is by close to one end that the air intake duct of particulate trap is open to close particulate trap The area of section of one end of exhaust outlet successively decreases successively.Since flow is very fast when having just enter into air intake duct for tail gas, close to air inlet Partial high silica glass block area bigger, is effectively filtered for tail gas, more gos deep into air intake duct, the flow of tail gas is got over Slowly, then required high silica glass block area smaller, while exhaust outlet is disposed in proximity to the high silica glass block The smaller one end of the area of end face, make tail gas can with fully filtering is carried out on high silica glass block after be discharged.

As preferred：The high silica glass block is prism-frustum-shaped or round table-like.

As preferred：The prism-frustum-shaped is quadrangular frustum pyramid shaped.

As preferred：The electrical heating core includes more exploration type thermal resistance heaters, the exploration type thermal resistance heating Device is circumferentially arranged and is uniformly distributed in high silica glass block.

As preferred：The shell is cube.

As preferred：The exhaust ports are provided with filter paper layer and/or active carbon layer.Wherein high silica glass block can needle Larger particles in diesel engine vent gas are absorbed and filter, filter paper layer and/or active carbon layer is arranged in exhaust ports can be into One step carries out barrier or suction-operated for small particle, to be effectively filtered processing for diesel engine vent gas.

As preferred：It is additionally provided with thermal conductive material layer between the high silica glass block and shell.

Thermal conductive material layer carries out heat derives further directed to the tail gas of high temperature, to avoid the gas temperature of exhaust outlet discharge It is higher.

Compared with prior art, it is with advantageous effect the advantages of the utility model：

1, the utility model uses filter core of the high silica fiber as particle trap, high silica glass block to can contact face Product is very big, improves filter efficiency, while the high temperature tolerance degree of high silica glass block can reach 1000 DEG C or more, can reach again The requirement of high temperature when raw.And high silica glass block is there is no radial and lateral expansion coefficient difference, in regenerative process by Hot uniform, block will not be because of thermal stress damage.In addition for cost, the filtering block of same volume uses high silica glass The cost of block is far below ceramic material, and weight is lighter, can mitigate the weight of diesel engine exhaust gas treatment device.

2, high silica glass block designs are prism-frustum-shaped or round table-like by the utility model, due to tail gas have just enter into Air flue is that flow is very fast, close to the high silica glass block area bigger of air inlet parts, is effectively filtered for tail gas, more Go deep into air intake duct, the flow of tail gas is slower, then required high silica glass block area smaller, while exhaust outlet being arranged In the smaller one end of the area close to the high silica glass block end face, tail gas is enable to be carried out on high silica glass block Fully it is discharged after filtering.

3, the utility model uses high silica glass fiber paper as filter core, and filter core has the good accumulation of heat capacity of heat transmission, can incite somebody to action Gas effective temperature-reducing can arrange the adsorbents such as the slightly weaker activated carbon of heat resistance in outlet end, and further absorption removes Little particle micronic dust impurity except bulky grain, strengthened purification effect.

Description of the drawings

Fig. 1 is the structural schematic diagram of the specific implementation mode of the utility model diesel particulate filter；

Fig. 2 is diesel particulate filter shown in the utility model Fig. 1 along a kind of embodiment section view of line A-A；

Fig. 3 is diesel particulate filter shown in the utility model Fig. 1 along the section view of line B-B；

Fig. 4 is the structural schematic diagram of the high silica glass block of the utility model；

Fig. 5 is that diesel particulate filter shown in the utility model Fig. 1 is regarded along the another embodiment section of line A-A Figure；

In above each figure：1, shell；2, air intake duct；3, electrical heating core；4, high silica glass block；41, flat layer；42, Corrugated layer；5, exhaust outlet；6, filter paper layer；7, active carbon layer；8, thermal conductive material layer.

Specific implementation mode

In the following, the utility model is specifically described by illustrative embodiment.It should be appreciated, however, that not having In the case of being further discussed below, element, structure and features in an embodiment can also be advantageously incorporated into other implementations In mode.

Embodiment：As shown in Figure 1, Figure 2 and Figure 3, a kind of diesel particulate filter, including shell 1, in the shell 1 It is provided with air intake duct 2, one end of the air intake duct 2 is connected with diesel exhaust gas end, and the other end is seal shape；Positioned at the shell In body 1,2 outer surface of air intake duct be arranged with the filter core for adsorption particle object, be provided in the filter core for regenerating filter The electrical heating core 3 of core, the filter core are high silica glass block 4, and the high silica glass block 4 is in corrugated structure, the shell Exhaust outlet 5 is provided on body 1.

Wherein, the corrugated paper structure that filter core is constituted using high silica glass block 4, specifically the filter core is vertical Section is in corrugated structure.Since to can contact area very big for it, easily particulate matter can be adsorbed onto on filter core.The high silicon Oxygen glass block 4 can be a monoblock, it is possibility to have several pieces of splicing compositions, the high temperature tolerance degree of high silica glass block 4 can Reach 1000 DEG C or more, the requirement of high temperature when can reach regeneration.And there is no radial and lateral expansion systems for high silica glass Several difference is heated evenly in regenerative process, and block will not be because of thermal stress damage, while having heat accumulation function, avoids to unofficial biography Defeated higher temperature；When regeneration, electrical heating core 3 is opened, Filter overall is heated, and the carbon deposit particulate matter adsorbed on filter core is burnt Fall, reaches regenerated purpose.

In the description of the present invention, it should be noted that term "inner", "outside", "upper", "lower", "front", "rear" etc. The orientation or positional relationship of instruction is position relationship based on ... shown in the drawings, is merely for convenience of description the utility model and simplification Description, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and behaviour Make, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " are only used for description mesh , it is not understood to indicate or imply relative importance.

Further as shown in figure 3, the high silica glass block 4 divides flat layer 41 and corrugated layer 42 for interconnection, The flat layer 41 is sequentially overlapped with the corrugated layer 42 and is arranged alternately.To increase high silica glass block 4 and diesel engine vent gas Contact area.The flat layer 41 and the corrugated layer 42 are perpendicular with the air intake duct 2.To increase high silica glass block The contact area of body 4 and diesel engine vent gas.It can be Fig. 3 that the wherein described flat layer 41, which is superimposed arrangement mode with the corrugated layer 42, Shown in stack gradually in one direction, or it is shown in Fig. 4 to be stacked gradually along four direction.

Further as shown in Fig. 2, Fig. 4 and Fig. 5, the filter core is by close to one end that the air intake duct 2 of particulate trap is open Area of section to one end of the exhaust outlet 5 close to particulate trap successively decreases successively.Since tail gas is when having just enter into air intake duct 2 Flow is very fast, close to the high 4 area bigger of silica glass block of air inlet parts, is effectively filtered for tail gas, more deep In air intake duct 2, the flow of tail gas is slower, then required high 4 area smaller of silica glass block, while exhaust outlet 5 being arranged In the smaller one end of the area close to high 4 end face of silica glass block, make tail gas can be enterprising with high silica glass block 4 It is discharged after row fully filtering.

Further as shown in Figure 2 and Figure 4, the high silica glass block 4 is prism-frustum-shaped or round table-like.Preferably, institute It is quadrangular frustum pyramid shaped to state prism-frustum-shaped.

Further as shown in Figure 1, the electrical heating core 3 includes more exploration type thermal resistance heaters, the exploration type heat Resistance heater is circumferentially arranged and is uniformly distributed in high silica glass block 4.The shell 1 is cube.

Further as shown in Fig. 2, being provided with filter paper layer 6 and/or active carbon layer 7 at the exhaust outlet 5.Wherein high silica glass Fine block 4 can be directed to larger particles in diesel engine vent gas and be absorbed and filter, and filter paper layer 6 is arranged at exhaust outlet 5 and/or lives Property layer of charcoal 7 can be carried out further directed to small particle barrier or suction-operated, to be effectively filtered for diesel engine vent gas Processing.

Further as shown in figure 5, being additionally provided with thermal conductive material layer 8 between the high silica glass block 4 and shell 1.

The use principle of diesel particulate filter described in the utility model：

The tail gas of diesel engine discharge is entered by the air inlet of air intake duct 2, and electricity is sequentially passed through after tail gas enters air intake duct 2 and is added Hot core 3 is discharged and in exhaust outlet 5 after making bulky grain tail gas be adsorbed on excessively high silica glass block 4 by exhaust outlet 5 Go out after being adsorbed or being obstructed little particle tail gas via filter paper layer 6 and/or active carbon layer 7 and is discharged.When needs are to high silica glass When block 4 continues regeneration, filter paper layer 6 or active carbon layer 7 are removed, then electrical heating core 3 is opened, high silica glass block 4 is whole Body is heated, and the carbon deposit particulate matter adsorbed on high silica glass block 4 is burned off, and reaches regenerated purpose.

Claims (10)

1. a kind of diesel particulate filter, including shell, it is characterised in that：Be provided with air intake duct in the shell, it is described into One end of air flue is connected with diesel exhaust gas end, and the other end is seal shape；In the shell, the air intake duct outer surface It is arranged with the filter core for adsorption particle object, the electrical heating core for regenerating filter core is provided in the filter core, the filter core is High silica glass block, the high silica glass block are in corrugated structure, and exhaust outlet is provided on the shell.

2. diesel particulate filter according to claim 1, it is characterised in that：The high silica glass block is divided into phase The flat layer and corrugated layer to connect, the flat layer are sequentially overlapped with the corrugated layer and are arranged alternately.

3. diesel particulate filter according to claim 2, it is characterised in that：The flat layer and the corrugated layer are equal It is perpendicular with the air intake duct.

4. diesel particulate filter according to claim 1, it is characterised in that：The filter core is by close to particulate trap The area of section of one end of one end to the exhaust outlet close to particulate trap of air intake duct opening successively decrease successively.

5. diesel particulate filter according to claim 4, it is characterised in that：The high silica glass block is terrace with edge Shape is round table-like.

6. diesel particulate filter according to claim 5, it is characterised in that：The prism-frustum-shaped is quadrangular frustum pyramid shaped.

7. diesel particulate filter according to claim 1, it is characterised in that：The electrical heating core includes more and probes into Formula thermal resistance heater, the exploration type thermal resistance heater are circumferentially arranged and are uniformly distributed in high silica glass block.

8. diesel particulate filter according to claim 1, it is characterised in that：The shell is cube.

9. diesel particulate filter according to claim 1, it is characterised in that：The exhaust ports are provided with filter paper layer And/or active carbon layer.

10. diesel particulate filter according to claim 1, it is characterised in that：The high silica glass block and shell Thermal conductive material layer is additionally provided between body.