CN210889076U - A secondary ceramic particulate filter with catalytic combustion - Google Patents

Abstract

The utility model discloses a second grade ceramic particle filter with catalytic combustion, including filter housing, filter housing intussuseption is filled with the filter core, be equipped with the gas passage that a plurality of parallel intervals set up in the filter core, be separated each other by the filter wall between the gas passage, gas passage is including inlet channel and air outlet channel, inlet channel's air outlet department installs the shutoff, air outlet channel's inlet port department also installs the shutoff, the filter wall is piled up by one-level filter block and second grade filter block and encloses, the direction clamps the cooperation between one-level filter block and the second grade filter block, it is the micropore to distribute respectively on one-level filter block and second grade filter block's the lateral wall that is used for the gas direction, all scribble the catalyst coating on the millipore's the internal. The utility model has the advantages of reasonable design, the effectual jam problem that reduces the filter of second grade filtration that has catalytic combustion has strengthened the life of filter, and the effectual filter effect to particulate pollutants that has strengthened.

Description

A secondary ceramic particulate filter with catalytic combustion

Technical field:

The utility model relates to the field of ceramic particle filters, in particular to a secondary ceramic particle filter with catalytic combustion, which is used for purifying diesel engine exhaust gas.

Background technique:

Soot particles not only seriously pollute the environment, but also endanger human health, and the exhaust gas with particulate pollutants emitted by automobiles is one of the main pollution sources. The PM emission of the diesel exhaust of ordinary cars is dozens of times that of gasoline engines, so it is particularly important to purify the exhaust of diesel engines. The existing conventional one-stage ceramic particle filter cannot effectively filter the soot particles, this is because when the gas flows through the micropores, if the micropores are too small, the particle size of the particulate pollutants in the gas is larger than the diameter of the micropores, and the particles It will be left on the hole wall of the air intake channel to play the role of filtration. However, as the gas continues to pass through for a certain period of time, particulate pollutants will continue to accumulate, which will block the micropores. Once the micropores are blocked, the exhaust back pressure will increase, which will ultimately reduce the performance and fuel economy of the engine. In addition, if the micropore diameter is too large, a large number of particulate pollutants with a particle diameter smaller than the micropore diameter will pass through the micropores, so that the content of particulate pollutants emitted by the diesel engine exhaust gas exceeds the standard. The particle size of automobile exhaust particles and the proportion of particles with different diameters are usually difficult to estimate, so it is difficult for conventional ceramic particle filters to fully filter particulate pollutants.

Utility model content:

The purpose of the utility model is to make up for the defects of the prior art, and to provide a two-stage ceramic particle filter with catalytic combustion, which solves the problem that the conventional ceramic particle filter is difficult to clean the diesel engine exhaust because the diameter of the pores is too large or too small. It plays the role of fully filtering particulate pollutants, and the problem of clogging of micropores by particulate pollutants.

The utility model is achieved through the following technical solutions:

A secondary ceramic particle filter with catalytic combustion, comprising a filter housing, characterized in that: the filter housing is filled with a filter core body, and the filter core body is provided with a plurality of parallel intervals The gas channel is provided, and the gas channels are separated from each other by the filter wall. The gas channel includes an air inlet channel and an air outlet channel. A blocker is installed at the air outlet port of the air inlet channel. The air intake of the air outlet channel A plug is also installed at the port, the filter wall is surrounded by a stack of first-level filter blocks and second-level filter blocks, and the surrounding inner walls of the air inlet passage are respectively surrounded by strip-shaped first-level filter blocks. The outer side walls are respectively surrounded by secondary filter blocks, the secondary filter blocks are distributed on the outer side surface and the upper and lower end surfaces of the primary filter block, and an air outlet channel is formed between the adjacent secondary filter blocks. The side walls of the primary filter block and the secondary filter block are respectively distributed with micropores for gas guiding, the inner surfaces of the micropores are coated with a catalyst coating, and the micropores of the primary filter block are larger than those of the secondary filter block. The pores of the filter block.

The air outlet channel includes a main air outlet channel and an auxiliary air outlet channel. The main air outlet channel is surrounded by a secondary filter block that cooperates with the outer side of the primary filter block. The auxiliary air outlet channel is composed of a primary filter block. The second-level filter blocks matched with the upper and lower end surfaces of the block and the adjacent end surfaces of the second-level filter blocks matched with the outer surfaces of the first-level filter blocks are enclosed.

The cross-sections of the gas passages are all square.

The cross section of the primary filter block is rectangular, the cross section of the secondary filter block matched with the outer side of the primary filter block is rectangular, and the cross section matched with the two end surfaces of the primary filter block is square.

The primary filter block and the secondary filter block are fixed by means of end bonding.

The first-level filter block and the second-level filter block are guided and fitted together. The two end surfaces and the outer side surface of the first-level filter block are respectively provided with T-shaped guide grooves, and the corresponding second-level filter blocks are respectively provided with a T-shaped guide groove. There are T-shaped guide rails that cooperate with the T-shaped guide groove guide.

The micropore diameter of the primary filter block is 10-15 μm, and the micropore diameter of the secondary filter block is 4-7 μm.

The micropores are all circular and uniformly distributed.

The principle is: the filter core is placed in the filter housing, and the filter core has a large number of parallel air inlet channels and air outlet channels, and the channels and channels are separated from each other by the filter wall. The first-stage filter block and the second-stage filter block are evenly distributed with micropores of different sizes, which are used for the gas to pass through and filter the soot particles in the gas. The filter includes two primary filter blocks and secondary filter blocks with different micropore diameters, and the micropore diameter of the primary filter block is larger than the micropore diameter of the secondary filter block. The channel surrounded by the primary filter block is blocked on the gas outflow side, and the gas channel surrounded by the secondary filter block is blocked on the gas inflow side. The secondary filter block includes a secondary filter block matched with the end face of the primary filter block and a secondary filter block matched with the outer side of the primary filter block, and the size of the secondary filter block matched with the outer side of the primary filter block. The shape is the same as the size and shape of the primary filter block, and the size and shape of the secondary filter block matched with the end face of the primary filter block are different from the size and shape of the primary filter block.

In the filter, the gas flows through the first-stage filter block coated with catalyst and the second-stage filter block coated with catalyst in sequence along the intake channel, and then enters the air outlet channel enclosed by the second-stage filter block, and finally flows into the atmosphere through the air outlet channel. . Its overall structural design is reasonable, which increases the purification path and purification time of the fluid, and enhances the filtration effect. Moreover, it is gradually filtered through the first-stage filter block and the second-stage filter block, which avoids the phenomenon of blockage caused by one-time direct filtration, and enhances the filtration effect. The service life of the filter is improved, and the filtering effect of particulate pollutants is effectively enhanced.

The advantages of the utility model are:

Compared with the conventional primary filtration, the secondary filtration with catalytic combustion effectively reduces the clogging problem of the filter, enhances the service life of the filter, and effectively enhances the pollution to particles. the filtering effect of the material.

Description of drawings:

Figure 1 is a schematic structural diagram of the utility model.

Figure 2 is a partial cross-sectional view of the filter core.

FIG. 3 is a partial structural cross-sectional view of the combination of the primary filter block and the secondary filter block by bonding.

Fig. 4 is a partial structural cross-sectional view of the first-level filter block and the second-level filter block using the guide groove to cooperate and combine.

FIG. 5 is a partial enlarged cross-sectional view of the first-stage filter block.

FIG. 6 is a partial enlarged cross-sectional view of the secondary filter block.

Detailed ways:

See attached image.

A secondary ceramic particle filter with catalytic combustion, comprising a filter housing 1, the filter housing 1 is filled with a filter core 2, and the filter core 2 is provided with a plurality of Gas channels arranged in parallel and spaced apart, the gas channels are separated from each other by filter walls, the gas channels include an air inlet channel 3 and an air outlet channel 4, and a plug 5 is installed at the outlet port of the air inlet channel 3, so A blocker 5 is also installed at the air inlet port of the air outlet channel 4, the filter wall is formed by stacking a primary filter block 6 and a secondary filter block 7, and the surrounding inner walls of the air inlet channel 3 are respectively formed by strips. The block-shaped primary filter block 6 is surrounded by, and its outer side walls are respectively surrounded by secondary filter blocks 7. The secondary filter blocks 7 are distributed on the outer side and the upper and lower end surfaces of the primary filter block. The air outlet channel 4 is formed between the secondary filter blocks 7, the side walls of the primary filter block 6 and the secondary filter block 7 are respectively distributed with micropores 8 for gas guiding, and the inner surface of the micropore 8 A catalyst coating is applied on both, and the micropores 8 of the primary filter block 6 are larger than the micropores 8 of the secondary filter block 7 .

The air outlet channel 4 includes a main air outlet channel 4-1 and an auxiliary air outlet channel 4-2. The main air outlet channel 4-1 is composed of a secondary filter block 7-1 matched with the outer side of the primary filter block 6. Enclosed, the auxiliary air outlet channel 4-2 is composed of a secondary filter block 7-2 matched with the upper and lower end surfaces of the primary filter block 6 and an adjacent secondary filter block 7 matched with the outer side of the primary filter block. The end face of -1 is enclosed.

The cross-sections of the gas passages are all square.

The cross section of the first-level filter block 6 is a rectangle, the cross-section of the second-level filter block 7-1 that cooperates with the outer side of the first-level filter block is a rectangle, and the second-level filter block 6 is matched with the two end faces of the first-level filter block. The cross section of the filter block 7-2 is square.

The primary filter block 6 and the secondary filter block 7 are fixed by means of end bonding.

The first-level filter block 6 and the second-level filter block 7 are guided and fitted together. The two end faces and the outer side of the first-level filter block are respectively provided with T-shaped guide grooves, which are corresponding to the matching second-level filter block. There are respectively T-shaped guide rails that are guided and matched with the T-shaped guide grooves.

The micropore diameter of the primary filter block 6 is 10-15 μm, and the micropore diameter of the secondary filter block 7 is 4-7 μm.

The micropores 8 are all circular and uniformly distributed.

Compared with the conventional primary filtration, the secondary filtration with catalytic combustion effectively reduces the clogging problem of the filter, increases the service life of the filter, and effectively enhances the filtering effect of particulate pollutants. This is because the large-diameter particles in the exhaust gas are filtered first and then the small-diameter particles are filtered through the secondary ceramic particle filter with catalytic combustion, so that both large-diameter particles and small-diameter particles can be fully filtered; The inner surface is coated with catalyst, so that the soot particles can be fully burned, so most of the soot particles are catalytically burned into CO2 and water. Therefore, the use of a two-stage ceramic particulate filter with catalytic combustion can fully filter and purify the particulate pollutants in the diesel exhaust.

Claims (8)

1. A two-stage ceramic particulate filter with catalytic combustion, comprising a filter housing, characterized in that: the filter shell is internally filled with a filter core body, the filter core body is internally provided with a plurality of gas channels which are arranged in parallel at intervals, the gas channels are separated by the filter wall, each gas channel comprises a gas inlet channel and a gas outlet channel, the gas outlet port of the gas inlet channel is provided with a plug, the gas inlet port of the gas outlet channel is also provided with a plug, the filter wall is formed by stacking and enclosing a first-stage filter block and a second-stage filter block, the peripheral inner side walls of the gas inlet channel are respectively enclosed by strip-shaped first-stage filter blocks, the outer side walls of the gas inlet channel are respectively enclosed by second-stage filter blocks, the second-stage filter blocks are distributed on the outer side surface and the upper and lower end surfaces of the first-stage filter block, the gas outlet channels are formed between the adjacent second-stage filter blocks, and, the inner surfaces of the micropores are coated with catalyst coatings, and the micropores of the primary filter block are larger than those of the secondary filter block.

2. The two-stage ceramic particulate filter with catalytic combustion as set forth in claim 1, wherein: the air outlet channel comprises a main air outlet channel and an auxiliary air outlet channel, the main air outlet channel is surrounded by a secondary filter block matched with the outer side surface of the primary filter block, and the auxiliary air outlet channel is surrounded by the secondary filter block matched with the upper end surface and the lower end surface of the primary filter block and the end surfaces of the adjacent secondary filter blocks matched with the outer side surface of the primary filter block.

3. The two-stage ceramic particulate filter with catalytic combustion as set forth in claim 1, wherein: the cross section of the gas channel is square.

4. The two-stage ceramic particulate filter with catalytic combustion as set forth in claim 3, wherein: the cross section of the primary filter block is rectangular, the cross section of the secondary filter block matched with the outer side surface of the primary filter block is rectangular, and the cross section of the secondary filter block matched with the two end surfaces of the primary filter block is square.

5. The two-stage ceramic particulate filter with catalytic combustion as set forth in claim 1, wherein: the first-stage filter block and the second-stage filter block are fixed by adopting a method of end bonding.

6. The two-stage ceramic particulate filter with catalytic combustion as set forth in claim 1, wherein: the first-stage filter block and the second-stage filter block are in guide clamping fit, two end faces and the outer side face of the first-stage filter block are respectively provided with a T-shaped guide groove, and the corresponding matched second-stage filter block is respectively provided with a T-shaped guide rail in guide fit with the T-shaped guide groove.

7. The two-stage ceramic particulate filter with catalytic combustion as set forth in claim 1, wherein: the diameter of the micropores of the first-stage filter block is 10-15 μm, and the diameter of the micropores of the second-stage filter block is 4-7 μm.

8. The two-stage ceramic particulate filter with catalytic combustion as set forth in claim 1, wherein: the micropores are all round and all uniformly distributed.

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