Three-way catalytic purification device for tail gas

Abstract

The utility model belongs to the field of tail gas purification, and discloses a three-way catalytic purification device for tail gas, which comprises a shell, a gas inlet pipe is fixedly arranged at the right end part of the shell, a gas outlet pipe is fixedly arranged at the left end part of the shell through a fastener, and a purification assembly is arranged in the shell. And a filtering assembly is mounted in the air inlet pipe. The shell is made of a high-temperature-resistant and corrosion-resistant metal material, can be made of stainless steel and is cylindrical. The fastener comprises a first fixing ring and a second fixing ring, the inner wall of the first fixing ring and the outer wall of the air outlet pipe are fixedly installed, and the inner wall of the second fixing ring and the outer wall of the shell are fixedly installed. According to the utility model, tail gas can be subjected to catalytic purification reaction through the arranged micro-channel reactor module, the micro-channel reactor module can be conveniently mounted and dismounted especially through the arranged clamping rod and the elastic clamping piece, and the micro-channel reactor module can be regularly maintained and replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas purification field especially relates to a tail gas three way catalytic purification device. BACKGROUND

[0002] With the sustained growth of the number of cars, the pollution caused by automobile exhaust emissions to the environment is increasingly serious. As an important off-purification device in the automobile exhaust system, the three-way catalyst can convert harmful gases such as carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) in automobile exhaust into harmless carbon dioxide (CO2), water (H2O) and nitrogen (N2) through oxidation and reduction. However, the existing three-way catalytic purification device still has some problems in actual use, for example, the purification efficiency needs to be further improved, especially in the cold start stage of the vehicle, the catalyst activity is low, which leads to poor tail gas purification effect; the catalyst is easily poisoned by impurities such as sulfur and phosphorus, thereby shortening its service life; in addition, when the purification carrier is damaged, it is difficult to find and replace in time, thereby affecting the tail gas purification effect and leading to a large amount of pollution gas emission into the environment.

[0003] Therefore, we propose a three-way catalytic purification device for tail gas to solve the problem. CONTENT OF THE UTILITY MODEL

[0004] The utility model relates to a three-way catalytic purification device for tail gas, which is used to solve the technical problems in the background art.

[0005] The technical scheme provided by the utility model is as follows: a three-way catalytic purification device for tail gas, comprising a shell: a gas inlet pipe is fixedly installed at the right end of the shell, and a gas outlet pipe is fixedly installed at the left end of the shell through a fastener, a purification assembly is arranged inside the shell, and a filter assembly is installed inside the gas inlet pipe.

[0006] Preferably, the shell is made of a high-temperature-resistant and corrosion-resistant metal material, such as stainless steel, and has a cylindrical shape.

[0007] Preferably, the fastener comprises a first fixing ring and a second fixing ring, the inner wall of the first fixing ring is fixedly installed with the outer wall of the gas outlet pipe, the inner wall of the second fixing ring is fixedly installed with the outer wall of the shell, the right side surface of the first fixing ring is in contact with the left side surface of the second fixing ring, and the first fixing ring and the second fixing ring are fixedly installed through bolts.

[0008] Preferably, the purification assembly comprises a micro-channel reactor module, an outer wall of a cylindrical mounting plate of the micro-channel reactor module is fixedly installed with an inner wall of a shell, a side of the micro-channel reactor module is provided with a micro-channel, the micro-channel is filled with ternary catalyst particles, an outer wall of the micro-channel reactor module is fixedly installed with a clamping rod, the clamping rod is clamped in an installation slot formed in a side of the cylindrical mounting plate, and elastic clamping pieces are clamped on two sides of the clamping rod and fixedly installed with inner walls of the installation slot.

[0009] Preferably, a diameter of the micro-channel is between 0.1 mm and 1 mm, and the catalyst particles are prepared by compounding a noble metal and a rare earth oxide.

[0010] Preferably, heat absorption plates are arranged at both sides of the micro-channel reactor module, an outer wall of the heat absorption plate is fixedly installed with an inner wall of the shell, and the two heat absorption plates can absorb heat and store heat, preheat the tail gas entering the device, rapidly increase the temperature of the tail gas to the light-off temperature of the catalyst, thereby accelerating the activity of the catalyst and improving the tail gas purification effect.

[0011] Preferably, the filter assembly comprises a filter plate, an outer wall of the filter plate is slidably arranged with an inner wall of a gas inlet pipe, a lower surface of the filter plate is fixedly installed with a connecting block, the connecting block is slidably arranged with an outer arc-shaped slot formed in an inner wall of the gas inlet pipe, the inner wall of the gas inlet pipe is further formed with a rectangular slot in communication with the outer arc-shaped slot, and the connecting block is fixedly installed with an arc-shaped clamping block, and the arc-shaped clamping block is slidably arranged with an inner arc-shaped slot formed in an inner wall of the outer arc-shaped slot.

[0012] Preferably, a connecting column is fixedly installed at a center of a side of the filter plate, and the connecting column facilitates the disassembly and assembly of the filter plate, and is convenient to operate.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) The micro-channel reactor module can catalytically purify the tail gas, the clamping rod and the elastic clamping pieces facilitate the installation and disassembly of the micro-channel reactor module, and the micro-channel reactor module can be regularly maintained and replaced.

[0015] (2) The filter plate can adsorb small impurities such as sulfur and phosphorus compounds in the tail gas, thereby protecting the catalyst and prolonging the service life of the catalyst, the connecting block and the arc-shaped clamping block facilitate the disassembly of the filter plate, and the filter plate can be regularly maintained and replaced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1It is the arrangement three-dimensional structure schematic view of a tail gas three-way catalytic purification device of the utility model;

[0017] Figure 2 It is the shell cross-section structure schematic view in a tail gas three-way catalytic purification device of the utility model;

[0018] Figure 3 It is the purification assembly structure schematic view in a tail gas three-way catalytic purification device of the utility model;

[0019] Figure 4 It is a tail gas three-way catalytic purification device of the utility model Figure 3 The A place enlarged structure schematic view in;

[0020] Figure 5 It is the air inlet pipe cross-section structure schematic view in a tail gas three-way catalytic purification device of the utility model;

[0021] Figure 6 It is the partial structure schematic view in a tail gas three-way catalytic purification device of the utility model Figure 5

[0022] The reference signs are as follows:

[0023] 1, shell;2, air inlet pipe;3, air outlet pipe;4, first fixed ring;5, second fixed ring;6, heat absorption plate;7, cylindrical mounting plate;8, microchannel reactor module;9, mounting groove;10, clamping rod;11, elastic card;12, rectangular groove;13, filter plate;14, connecting column;15, connecting block;16, outer arc-shaped groove;17, inner arc-shaped groove;18, arc-shaped clamping block. Specific embodiments

[0024] The present application will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of changes and improvements can be made. These all belong to the protection scope of the present application.

[0025] As Figures 1-6 ​As shown, a tail gas three-way catalytic purification device, comprising a shell 1, the shell 1 is made of high temperature resistant, corrosion resistant metal material, can use stainless steel, and the shape is cylindrical, the right end of the shell 1 is fixedly installed with the air inlet pipe 2, and the left end of the shell 1 is fixedly installed with the air outlet pipe 3 through the fastener, the fastener includes the first fixed ring 4 and the second fixed ring 5, the inner wall of the first fixed ring 4 is fixedly installed with the outer wall of the air outlet pipe 3, the inner wall of the second fixed ring 5 is fixedly installed with the outer wall of the shell 1, the right side surface of the first fixed ring 4 is in contact with the left side surface of the second fixed ring 5, and the first fixed ring 4 and the second fixed ring 5 are fixedly installed through the bolt, the inside of the shell 1 is provided with a purification assembly, and the inside of the air inlet pipe 2 is provided with a filter assembly.

[0026] The purification assembly includes a microchannel reactor module 8, the outer portion of the microchannel reactor module 8 is sleeved with a cylindrical mounting plate 7, the outer wall of the cylindrical mounting plate 7 is fixedly installed with the inner wall of the shell 1, the side surface of the microchannel reactor module 8 has a microchannel setting, and the microchannel is filled with three-way catalyst particles, the diameter of the microchannel is between 0.1-1mm, the catalyst particles are prepared by the way of combining noble metal and rare earth oxide, the two sides of the microchannel reactor module 8 are provided with heat absorption plates 6, the outer wall of the heat absorption plate 6 is fixedly installed with the inner wall of the shell 1, the two heat absorption plates 6 can store heat, and the tail gas entering the device can be preheated, so that the temperature of the tail gas rapidly rises to the ignition temperature of the catalyst, thereby accelerating the activity of the catalyst and improving the tail gas purification effect, the outer wall of the microchannel reactor module 8 is fixedly installed with a clamping rod 10, the clamping rod 10 is clamped in the mounting groove 9 opened in the side surface of the cylindrical mounting plate 7, and the two surfaces of the clamping rod 10 are clamped with elastic clamping pieces 11, and the elastic clamping pieces 11 are fixedly installed with the inner wall of the mounting groove 9.

[0027] The filter assembly includes a filter plate 13, a connecting column 14 is fixedly installed at the center of the side surface of the filter plate 13, the connecting column 14 is convenient for disassembling and assembling the filter plate 13, and the operation is relatively convenient, the outer wall of the filter plate 13 is slidably arranged with the inner wall of the air inlet pipe 2, a connecting block 15 is fixedly installed on the lower surface of the filter plate 13, the connecting block 15 is slidably arranged with an outer arc-shaped groove 16 opened in the inner wall of the air inlet pipe 2, and the inner wall of the air inlet pipe 2 is also provided with a rectangular groove 12 communicated with the outer arc-shaped groove 16, the connecting block 15 is fixedly installed with an arc-shaped clamping block 18, and the arc-shaped clamping block 18 is slidably arranged with an inner arc-shaped groove 17 opened in the inner wall of the outer arc-shaped groove 16.

[0028] Working principle: first exhaust gas into the intake pipe 2, then through the filter plate 13 installed in the intake pipe 2, can effectively adsorb the sulfur, phosphorus compounds and other small impurities in the tail gas, so as to protect the catalyst, prolong its service life, at the same time, the connecting block 15, arc-shaped clamping block 18 arranged here can realize the quick disassembly of filter plate 13, facilitate regular maintenance and replacement work, after the filter plate 13 treatment of tail gas into the shell 1, evenly through the micro channel reactor module 8 for catalytic purification reaction, then the purified gas from the exhaust pipe 3 discharge, complete purification work.

[0029] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0030] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-way catalytic converter for exhaust gases, comprising a housing (1) characterised in that: The right end of the shell (1) is fixedly installed with an air inlet pipe (2), and the left end of the shell (1) is fixedly installed with an air outlet pipe (3) through a fastener, the inside of the shell (1) is provided with a purification assembly, and the inside of the air inlet pipe (2) is installed with a filter assembly.

2. A three-way catalytic converter for exhaust gas according to claim 1, wherein The shell (1) is made of a metal material resistant to high temperature and corrosion, which can be stainless steel, and has a cylindrical shape.

3. The three-way catalytic converter of claim 1, wherein the catalyst is a platinum group metal. The fastener comprises a first fixing ring (4) and a second fixing ring (5), the inner wall of the first fixing ring (4) is fixedly installed with the outer wall of the air outlet pipe (3), the inner wall of the second fixing ring (5) is fixedly installed with the outer wall of the shell (1), the right side surface of the first fixing ring (4) is in contact with the left side surface of the second fixing ring (5), and the first fixing ring (4) and the second fixing ring (5) are fixedly installed through bolts.

4. The three-way catalytic converter of claim 1, wherein the catalyst is a platinum catalyst. The purification assembly comprises a micro-channel reactor module (8), the outside of the micro-channel reactor module (8) is sleeved with a cylindrical mounting plate (7), the outer wall of the cylindrical mounting plate (7) is fixedly installed with the inner wall of the shell (1), the side surface of the micro-channel reactor module (8) is provided with a micro-channel, and the micro-channel is filled with ternary catalyst particles, the outer wall of the micro-channel reactor module (8) is fixedly installed with a clamping rod (10), the clamping rod (10) is clamped in the mounting groove (9) formed in the side surface of the cylindrical mounting plate (7), and the two side surfaces of the clamping rod (10) are clamped with elastic clamping plates (11), and the elastic clamping plates (11) are fixedly installed with the inner wall of the mounting groove (9).

5. A three-way catalytic converter for exhaust gas according to claim 4, wherein The diameter of the micro-channel is 0.1-1mm, and the catalyst particles are prepared by compounding noble metal and rare earth oxide.

6. A three-way catalytic converter for exhaust gas according to claim 4, wherein Heat absorption plates (6) are arranged at both sides of the micro-channel reactor module (8), and the outer wall of the heat absorption plate (6) is fixedly installed with the inner wall of the shell (1).

7. The three-way catalytic converter of claim 1, wherein the catalyst is a platinum group metal. The filter assembly comprises a filter plate (13), the outer wall of the filter plate (13) is slidably arranged with the inner wall of the air inlet pipe (2), the lower surface of the filter plate (13) is fixedly installed with a connecting block (15), the connecting block (15) is slidably arranged with an outer arc-shaped groove (16) formed in the inner wall of the air inlet pipe (2), and the inner wall of the air inlet pipe (2) is further formed with a rectangular groove (12) in communication with the outer arc-shaped groove (16), the connecting block (15) is fixedly installed with an arc-shaped clamping block (18), and the arc-shaped clamping block (18) is slidably arranged with an inner arc-shaped groove (17) formed in the inner wall of the outer arc-shaped groove (16).

8. A three-way catalytic converter for exhaust gas according to claim 7, wherein The center of the side surface of the filter plate (13) is fixedly installed with a connecting column (14).

Images