CN206830269U - The tail gas catalyzed reforming unit of multi-purpose vehicle(MPV) - Google Patents

Abstract

The utility model relates to a multifunctional automobile tail gas catalytic conversion device. The utility model comprises a DPF particle catcher, an HC adsorber and a three-way catalytic converter which are located in the automobile tail gas discharge pipeline and sequentially treat the tail gas. Zeolite molecular sieves are arranged in the HC adsorber, and catalyst carriers in the three-way catalytic converter are arranged. For porous cordierite porcelain beads. The utility model captures the large particles in the automobile exhaust discharged from the automobile cylinder by the DPF particle catcher to prevent the device from being blocked; the HC exhaust gas generated in the cold start stage of the automobile is adsorbed by the HC adsorber, and the zeolite molecular sieve can be used in the cold start stage of the automobile. Effectively absorb and store HC waste gas to control emissions; the porous cordierite ceramic beads in the three-way catalytic converter as a catalyst carrier is conducive to increasing the specific surface area of the catalyst, improving the efficiency of the catalytic reaction, and can reduce the thermal poisoning of the catalyst to a certain extent. The utility model has the advantages of simple structure, convenient maintenance and high tail gas treatment efficiency.

Description

Multifunctional automobile exhaust catalytic conversion device

technical field

The utility model relates to the field of automobile tail gas treatment, in particular to a multifunctional automobile tail gas catalytic conversion device.

Background technique

Since my country joined the World Trade Organization at the end of 2001, the economy has developed rapidly in the past ten years, among which the automobile industry is the most obvious. Up to now, my country has surpassed the United States to become the world's largest automobile sales market. According to statistics, the total output of motor vehicles in my country reached 10 million in 2009. In 2011, the total sales of automobiles in my country reached 18.5 million, and the number of vehicles in stock was higher than 50 million. Although at the beginning of recent years, the sales growth momentum has declined and the market has returned to calmness, the exhaust gas emitted by such large-scale motor vehicles has become the main source of urban pollution and is increasingly threatening our living environment.

According to a report by the State Environmental Protection Administration, diesel locomotives account for 79 percent of the air pollution in China's large cities. Sixteen of the world's 20 most air-polluted cities are in China. Acid rain, greenhouse effect, urban heat island effect, etc. have all caused harm to the living environment of human beings, and the root cause is largely from automobile exhaust pollution. In order to improve the environment on which we live, energy conservation and emission reduction has become a focus of attention of people from all walks of life. For more than ten years, China is gradually stepping out of the vicious development mode of "pollution first, treatment later". However, reducing the emission of toxic pollutants from internal combustion engines is still a difficult problem that must be overcome.

Contents of the invention

In order to solve the above technical problems, the utility model provides a multifunctional automobile exhaust catalytic conversion device, which can effectively reduce the toxic substances in the automobile exhaust, thereby reducing the pollution to the environment.

In order to achieve the above object, the utility model adopts the following technical solutions:

The multi-functional automobile exhaust catalytic conversion device includes a DPF particle trap, an HC adsorber and a three-way catalytic converter which are located in the automobile exhaust emission pipeline and sequentially treat the exhaust gas. The HC adsorber is arranged with a zeolite molecular sieve. The catalyst carrier in the three-way catalytic converter is porous cordierite porcelain beads.

Further, the DPF particulate trap includes a first filter grille plate and a second filter grille plate arranged at intervals to intercept and set in the automobile exhaust pipe, the first filter grille plate and the second filter grille plate The gap between the filter grid plates is filled with DPF filter core;

The HC adsorber includes a third filter grate plate and a fourth filter grate plate arranged at intervals to intercept and arrange in the automobile exhaust pipe, the third filter grate plate and the fourth filter grate plate The gap between is filled with the zeolite molecular sieve;

The three-way catalytic converter includes a fifth filter grille plate and a sixth filter grille plate arranged at intervals to intercept and set in the automobile exhaust pipe, the fifth filter grille plate and the sixth filter grille plate The gaps between the grid plates are filled with the porous cordierite ceramic beads loaded with catalyst.

Further, the first filter grating plate, the second filter grating plate, the third filter grating plate, the fourth filter grating plate, the fifth filter grating plate and the sixth filter grating plate are arranged in parallel and obliquely In the automobile exhaust emission pipeline.

Further, the automobile exhaust pipeline includes an intake pipe section connected by bolts, a first exhaust gas treatment pipe section for installing the DPF particulate trap, and a second exhaust gas treatment pipe section for installing the HC adsorber . The third tail gas treatment pipe section and the exhaust pipe section for installing the three-way catalytic converter.

Further, the automobile exhaust catalytic conversion device also includes a housing, the first tail gas treatment pipe section, the second tail gas treatment pipe section and the third tail gas treatment pipe section form a reaction chamber assembly, and the reaction chamber assembly is arranged on the Inside the casing, a vibration-damping pad is filled between the casing and the reaction chamber assembly.

Further, the housing is made of double-layer stainless steel plates, and a heat shield is installed outside the housing.

The beneficial effects of the above technical solutions are mainly reflected in the following aspects:

(1) When the utility model is used, the large particles in the automobile exhaust discharged from the automobile cylinder are first captured by the DPF particle catcher to prevent the device from clogging; Exhaust gas is adsorbed. This device adopts zeolite molecular sieve. The zeolite molecular sieve can effectively absorb and store HC exhaust gas during the cold start stage of the car to achieve the purpose of controlling emissions; finally, through the three-way catalytic converter, porous cordierite ceramic beads are used as The catalyst carrier is beneficial to increase the specific surface area of the catalyst, thereby increasing the reaction area between the catalyst and the automobile exhaust, improving the reaction efficiency, and reducing the heat poisoning of the catalyst to a certain extent. The utility model has the advantages of simple structure, convenient maintenance, high tail gas treatment efficiency, and effectively solves the tail gas discharge problem in the cold start stage of the automobile.

(2) The DPF filter element is filled between the first filter grid plate and the second filter grid plate of the utility model to form a particle adsorption reaction chamber, the third filter grid plate and the fourth filter grid The zeolite molecular sieve is filled between the grid plates and constitutes the HC exhaust gas adsorption reaction chamber, and the porous cordierite ceramic bead carrier loaded with catalyst is filled between the fifth filter grid plate and the sixth filter grid plate to form a Tail gas catalytic conversion reaction chamber, the arrangement sequence of these three reaction chambers is directly related to the effect of tail gas treatment.

(3) The first filter grid plate, the second filter grid plate, the third filter grid plate, the fourth filter grid plate, the fifth filter grid plate and the sixth filter grid plate are parallel And the inclined arrangement can play the role of airflow buffer, effectively reduce the air pressure in the reaction chamber, help to improve the stability and smoothness of the airflow in the device, increase the reaction area of tail gas treatment in the reaction chamber, and improve the effect of tail gas treatment.

(4) The first tail gas treatment pipe section, the second tail gas treatment pipe section and the third tail gas treatment pipe section described in the utility model are installed in the automobile exhaust gas discharge pipeline by means of bolt connection and form a reaction chamber assembly. The structure of the utility model Facilitate installation and disassembly. A vibration damping pad made of soft heat-resistant material is added between the reaction chamber assembly and the shell, so that the position of the reaction chamber assembly in the shell is firm and stable, and the air around the reaction chamber assembly is ensured. Tightness.

(5) The housing is made of stainless steel, and the housing is made of a double-layer structure to prevent the reaction chamber in the exhaust gas discharge pipeline from forming heat radiation to the outside; and the outer side of the housing is equipped with a full-circle heat shield, Further reduce the high-temperature radiation of the reaction chamber to the vehicle floor and prevent fires caused by the hot surface of the reaction chamber when entering the gas station, and at the same time avoid chilling damage to the reaction chamber caused by water splashing on the road and impact damage caused by flying stones on the road surface.

Description of drawings

Figure 1 is a schematic diagram of the interior of an automobile exhaust emission pipeline.

Fig. 2 is a schematic diagram of the internal structure of the casing after a partial cutaway.

The meanings of the marked symbols in the figure are as follows:

1-DPF particulate trap 2-HC adsorber 3-Three-way catalytic converter

4-First filter grid plate 5-Second filter grid plate 6-Third filter grid plate

7-Fourth filter grid plate 8-Fifth filter grid plate 9-Sixth filter grid plate

10-Reaction chamber assembly 11-Shell 12-Vibration pad 13-DPF filter element

14-zeolite molecular sieve 15-porous cordierite porcelain beads 16-fixed bracket

a-Intake pipe section b-First exhaust gas treatment pipe section c-Second exhaust gas treatment pipe section

d-the third exhaust gas treatment pipe section e-exhaust pipe section

detailed description

The structural features of the utility model are now described in conjunction with the accompanying drawings:

As shown in Figure 1, the utility model includes a DPF particle catcher 1, an HC adsorber 2 and a three-way catalytic converter 3 which are located in the automobile exhaust emission pipeline and sequentially treat the exhaust gas. There is a zeolite molecular sieve 14, and the catalyst carrier in the three-way catalytic converter 3 is a porous cordierite porcelain bead 15. The surface of the porous cordierite porcelain beads 15 has many micropores. The utility model improves the honeycomb ceramic carrier in the existing three-way catalytic converter, that is, adopts the porous cordierite porcelain beads 15 as the catalyst carrier for the tail gas reaction. Catalysts such as Pt and Ph are attached to its surface, which is beneficial to increase the specific surface area of the three-way catalytic converter 3, thereby treating automobile exhaust more efficiently.

When the utility model is used, the large particles in the automobile exhaust discharged from the automobile cylinder are first captured by the DPF particle catcher 1 to prevent the device from clogging; For adsorption, the device adopts zeolite molecular sieve 14, which can effectively absorb and store HC exhaust gas during the cold start stage of automobiles, so as to achieve the purpose of controlling emissions; finally, through the three-way catalytic converter 3, porous cordierite porcelain Beads 15 as a catalyst carrier are beneficial to increase the specific surface area of the catalyst, thereby increasing the reaction area between the catalyst and the automobile exhaust, improving the reaction efficiency, and reducing heat poisoning of the catalyst to a certain extent. The utility model has the advantages of simple structure, convenient maintenance, high tail gas treatment efficiency, and effectively solves the tail gas discharge problem in the cold start stage of the automobile.

The DPF particle trap 1 includes a first filter grille plate 4 and a second filter grille plate 5 arranged at intervals to intercept and set in the automobile exhaust pipe, the first filter grille plate 4 and the second filter grille plate 5 DPF filter core 13 is filled in the gap between the two filter grid plates 5;

The HC adsorber 2 includes a third filter grate plate 6 and a fourth filter grate plate 7 which are intercepted and arranged in the automobile exhaust pipeline and arranged at intervals, the third filter grate plate 6 and the fourth filter grate plate The gap between the filter grid plates 7 is filled with the zeolite molecular sieve 14;

The three-way catalytic converter 3 includes a fifth filter grille plate 8 and a sixth filter grille plate 9 arranged at intervals to intercept and arrange in the automobile exhaust pipe, the fifth filter grille plate 8 and the sixth filter grille plate 9 The gaps between the sixth filter grid plates 9 are filled with the porous cordierite ceramic beads 15 loaded with catalyst.

That is to say, the DPF filter core 13 is filled between the first filter grid plate 4 and the second filter grid plate 5 of the utility model to form a particle adsorption reaction chamber, and the third filter grid plate 6 and the fourth filter grid plate The zeolite molecular sieve 14 is filled between the filter grid plates 7 to form an HC exhaust gas adsorption reaction chamber, and the porous cordieres loaded with catalyst are filled between the fifth filter grid plate 8 and the sixth filter grid plate 9 The bluestone ceramic beads 15 also constitute the tail gas catalytic conversion reaction chamber, and the arrangement sequence of these three reaction chambers is directly related to the tail gas treatment effect.

The first filter grate plate 4, the second filter grate plate 5, the third filter grate plate 6, the fourth filter grate plate 7, the fifth filter grate plate 8 and the sixth filter grate plate 9 are parallel And it is obliquely arranged in the automobile exhaust emission pipeline. According to the utility model, the first filter grid plate 4, the second filter grid plate 5, the third filter grid plate 6, the fourth filter grid plate 7, the fifth filter grid plate 8 and the sixth filter grid plate The layout of the plate 9 can play a role of airflow buffering, effectively reducing the air pressure in the reaction chamber, improving the stability and smoothness of the airflow in the device, increasing the tail gas treatment reaction area in the reaction chamber, and improving the tail gas treatment effect.

The automobile exhaust emission pipeline includes an intake pipe section a connected by bolts, a first exhaust gas treatment pipe section b for installing the DPF particulate trap 1, and a second exhaust gas treatment pipe section for installing the HC adsorber 2. Pipe section c, the third tail gas treatment pipe section d and exhaust pipe section e for installing the three-way catalytic converter 3 .

As shown in Figure 2, the automobile exhaust catalytic conversion device also includes a housing 11, the first tail gas treatment pipe section b, the second tail gas treatment pipe section c and the third tail gas treatment pipe section d form a reaction chamber assembly 10, the The reaction chamber assembly 10 is disposed in the housing 11 , and a vibration-damping pad 12 is filled between the housing 11 and the reaction chamber assembly 10 .

According to the utility model, the first tail gas treatment pipe section b, the second tail gas treatment pipe section c and the third tail gas treatment pipe section d are installed in the automobile exhaust discharge pipeline through bolt connection and form a reaction chamber assembly 10. The utility model The structure is convenient for installation and disassembly. A damping pad 12 made of soft heat-resistant material is added between the reaction chamber assembly 10 and the housing 11, so that the position of the reaction chamber assembly 10 in the housing 11 is firm and stable, ensuring that the reaction chamber Airtightness around the assembly 10 .

The housing 11 is made of double-layer stainless steel plates, and a heat shield is installed outside the housing 11 . The housing 11 is made of stainless steel plate, and the housing 11 is made of a double-layer structure to prevent the reaction chamber in the exhaust gas discharge pipeline from forming heat radiation to the outside; and the outer side of the housing 11 is equipped with a full-circle heat shield, Further reduce the high-temperature radiation of the reaction chamber to the vehicle floor and prevent fires caused by the hot surface of the reaction chamber when entering the gas station, and at the same time avoid chilling damage to the reaction chamber caused by water splashing on the road and impact damage caused by flying stones on the road surface.

Claims (5)

1. the tail gas catalyzed reforming unit of multi-purpose vehicle(MPV), it is characterised in that：Including in vehicle vent gas discharging pipe road and to tail DPF particulate traps (1), HC absorbers (2) and the three-way catalytic converter (3) that gas is handled successively, the HC absorption Zeolite molecular sieve (14) is disposed with device (2), the interior catalyst carrier of the three-way catalytic converter (3) is porous cordierite porcelain bead (15)；

The DPF particulate traps (1) are arranged in the vehicle vent gas discharging pipe road and spaced apart first including interception Filter grid screen (4) and the second filter grid screen (5), between the first filter grid screen (4) and the second filter grid screen (5) Gap in be filled with DPF filtration cores (13)；

The HC absorbers (2) are arranged on including interception in the vehicle vent gas discharging pipe road and spaced apart 3rd filter grid Screen (6) and the 4th filter grid screen (7), the gap between the 3rd filter grid screen (6) and the 4th filter grid screen (7) In be filled with the zeolite molecular sieve (14)；

The three-way catalytic converter (3) is arranged in the vehicle vent gas discharging pipe road and the spaced apart 5th including interception Filter grid screen (8) and the 6th filter grid screen (9), between the 5th filter grid screen (8) and the 6th filter grid screen (9) Gap in be filled with supported catalyst the porous cordierite porcelain bead (15).

2. the tail gas catalyzed reforming unit of multi-purpose vehicle(MPV) as claimed in claim 1, it is characterised in that：First filtering grid Plate (4), the second filter grid screen (5), the 3rd filter grid screen (6), the 4th filter grid screen (7), the 5th filter grid screen (8) And the 6th filter grid screen (9) it is parallel and be in tilted layout in the vehicle vent gas discharging pipe road.

3. the tail gas catalyzed reforming unit of multi-purpose vehicle(MPV) as claimed in claim 1, it is characterised in that：The motor vehicle exhaust emission Pipeline includes passing sequentially through bolted air inlet pipeline section (a), the first tail gas for installing the DPF particulate traps (1) Handle pipeline section (b), the second vent gas treatment pipeline section (c) for installing the HC absorbers (2), for installing the three-element catalytic The 3rd vent gas treatment pipeline section (d) and exhaust pipeline section (e) of converter (3).

4. the tail gas catalyzed reforming unit of multi-purpose vehicle(MPV) as claimed in claim 3, it is characterised in that：The automotive exhaust catalysis turn Makeup, which is put, also includes housing (11), the first vent gas treatment pipeline section (b), the second vent gas treatment pipeline section (c) and the 3rd tail gas Handling pipeline section (d) and form reaction chamber aggregate (10), the reaction chamber aggregate (10) is arranged in the housing (11), Cushion blocking (12) is filled between the housing (11) and reaction chamber aggregate (10).

5. the tail gas catalyzed reforming unit of multi-purpose vehicle(MPV) as claimed in claim 4, it is characterised in that：The housing (11) is by double Layer stainless steel plate is formed, and heat shield is provided with outside the housing (11).