CN114699914B - Tail gas purifying device for engine test bed - Google Patents
Tail gas purifying device for engine test bed Download PDFInfo
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- CN114699914B CN114699914B CN202210299792.1A CN202210299792A CN114699914B CN 114699914 B CN114699914 B CN 114699914B CN 202210299792 A CN202210299792 A CN 202210299792A CN 114699914 B CN114699914 B CN 114699914B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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- Combustion & Propulsion (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a tail gas purifying device for an engine test bed, which comprises a cylinder, a cover body, a three-way catalytic assembly and a heating assembly, wherein an air inlet is arranged at the lower part of the cylinder and is connected with a tail gas discharge port of an engine terminal through a pipeline; the cover body is detachably connected to the opening at the upper part of the cylinder body, and is provided with an air outlet connected with the post-treatment assembly; the ternary catalytic assembly and the heating assembly are arranged in the cylinder body, and the ternary catalytic assembly is heated through the heating assembly, so that the purifying agent in the ternary catalytic assembly is at the optimal catalytic temperature, and harmful gas in tail gas discharged by the engine is purified. The device has the advantages of simple structure, easy maintenance and strong universality, and can ensure the tail gas purification efficiency and the purification quality.
Description
Technical Field
The invention relates to an exhaust gas treatment technology, in particular to an exhaust gas purifying device for an engine test bed.
Background
Before the engine is sent to a whole vehicle assembly workshop, the engine terminal detection needs to be carried out on a test bench, and a plurality of large-size whole vehicle accessories, such as an exhaust system, a three-way catalyst, a muffler and the like, can be assembled, and the accessories are large in size and large in occupied area required by assembling and storing the tool. And because the engine model detection state is numerous, have multiple structure flange joint, often be unfavorable for engine mixed line production.
Each whole car accessory needs corresponding frock to carry out assembly connection, leads to frock dismouting not only to be complicated, and some positions are because the assembly space is limited still inconvenient operation, and operating efficiency is low moreover. Besides, the purifying agent in the three-way catalyst can be effectively catalyzed only at the high temperature of about 400 ℃, so that the three-way catalyst needs to be arranged next to an engine terminal, the temperature attenuation of tail gas caused by overlong transmission distance is avoided, the catalytic efficiency of the purifying agent is influenced, the temperature of the three-way catalyst is higher during operation, and the three-way catalyst is easy to produce mistaken contact to cause scalding when being too close to the standing position of an operation desk, namely an operator, so that the safety production is not facilitated.
Disclosure of Invention
The invention aims to provide an exhaust gas purifying device for an engine test bed, which has the advantages of simple structure, easy maintenance and strong universality, and can ensure the exhaust gas purifying efficiency and the purifying quality.
The invention relates to a tail gas purifying device for an engine test bed, which comprises a cylinder, a cover body, a three-way catalytic assembly and a heating assembly, wherein an air inlet is arranged at the lower part of the cylinder and is connected with a tail gas discharge port of an engine terminal through a pipeline; the cover body is detachably connected to the opening at the upper part of the cylinder body, and is provided with an air outlet connected with the post-treatment assembly; the ternary catalytic assembly and the heating assembly are arranged in the cylinder body, and the ternary catalytic assembly is heated through the heating assembly, so that the purifying agent in the ternary catalytic assembly is at the optimal catalytic temperature, and harmful gas in tail gas discharged by the engine is purified.
Further, the three-way catalytic assembly comprises a shell and a purifying agent arranged in the shell; the heating assembly is arranged below the three-way catalytic assembly and comprises a plurality of heating rods which are vertically arranged and a temperature control sensor arranged at the lower end of the heating rods, and the upper ends of the heating rods extend into the three-way catalytic assembly to be in contact with the purifying agent; the heating device is characterized in that a first mounting hole for fixing the heating assembly is formed in the bottom surface of the cylinder body, and pins connected with a power supply and an electric control assembly are arranged at the lower end of the heating assembly.
Further, a heat insulation sleeve is sleeved outside the heating rod, and the heat insulation sleeve is in a cylindrical shape with an upper opening and a lower opening.
Further, two limiting plates are arranged in the cylinder body at intervals along the up-down direction, and limiting holes are formed in positions, corresponding to the heating rods, of the limiting plates.
Further, the cover body is provided with an installation part protruding outwards, the installation part is provided with a second installation hole for fixing the temperature sensor, and the second installation hole penetrates through the inner wall of the cover body and is communicated with the airflow passage.
Further, a transfer tube is fixed at the lower part of the cylinder body, one end of the transfer tube penetrates through the inner wall of the cylinder body and is communicated with a cavity in the cylinder body, the other end of the transfer tube is opened to serve as an air inlet, the end part of the transfer tube serving as the air inlet is connected with a first flange, and an inner hole of the first flange is in interference fit with the outer wall of the transfer tube; the air outlet of the cover body is connected with a second flange.
Further, a bracket fixed with the engine test bed is arranged on the outer wall of the cylinder body.
Further, the aftertreatment subassembly includes preceding silencer, back silencer and fan, and the air current that is discharged through the gas outlet of lid gets into preceding silencer and back silencer in proper order and mixes with the air, then discharges to outdoor pipeline through the fan pump, realizes high altitude emission.
Compared with the prior art, the invention has the following beneficial effects.
1. The air inlet at the lower part of the cylinder is connected with the tail gas discharge port of the engine terminal through the pipeline, the cover body is provided with the air outlet connected with the post-treatment component, and when bench tests are carried out on different engine models, the air inlet and the air outlet are directly connected with corresponding parts.
2. According to the invention, the ternary catalytic assembly is heated by the heating assembly, so that the purifying agent in the ternary catalytic assembly is at the optimal catalytic temperature, thereby purifying harmful gases in tail gas discharged by an engine and ensuring the purification efficiency and purification quality. If the purifying agent in the three-way catalytic assembly reaches the service life or the heating assembly is damaged, the cover body is disassembled, and the three-way catalytic assembly or the heating assembly is taken out from the cylinder body, so that maintenance and replacement can be realized, and convenience and rapidness are realized.
3. According to the invention, the air inlet of the cylinder body is connected with the tail gas discharge port of the engine terminal through the pipeline, the heating component for heating the ternary catalytic component is arranged in the cylinder body, so that the distance between the heating component and the engine body is properly pulled out while the smooth discharge of the tail gas of the engine terminal and the catalytic effect of the purifying agent are ensured, namely, the distance between an operator and the cylinder body is increased, scalding caused by false touch is avoided, the safety is improved, and the engine body is ensured not to be damaged in the assembly process.
4. The invention has simple structure, reliable performance and better universality, safety and economy.
Drawings
Fig. 1 is a schematic view of an exhaust gas purifying apparatus for an engine test stand according to the present invention;
FIG. 2 is a schematic view of the interior of the cartridge of the present invention;
FIG. 3 is a schematic view of a heating assembly according to the present invention;
FIG. 4 is a schematic view of the structure of the heating rod according to the present invention;
FIG. 5 is a schematic view of the structure of the limiting plate according to the present invention;
FIG. 6 is a schematic view of the bottom of the cartridge of the present invention;
FIG. 7 is a schematic illustration of the cooperation of a heating rod and a sleeve according to the present invention;
FIG. 8 is a schematic stitch diagram of a heating assembly according to the present invention;
FIG. 9 is a schematic view of a three-way catalytic assembly according to the present invention taken out;
FIG. 10 is a schematic diagram of engine exhaust emission flow during bench test.
In the figure, 1-cylinder, 2-cover, 21-mounting part, 22-second mounting hole, 3-ternary catalytic component, 4-heating component, 41-heating rod, 42-temperature control sensor, 43-stitch, 5-adapter tube, 6-first flange, 7-second flange, 8-bracket, 9-limit disk, 91-limit hole, 10-heat insulation sleeve, 11-first mounting hole, 12-engine, 13-pre-muffler, 14-post-muffler and 15-fan.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 to 8, the exhaust gas purifying device for an engine test bed comprises a cylinder 1, a cover 2, a three-way catalytic assembly 3 and a heating assembly 4, wherein a bracket 8 fixed with the engine test bed is arranged on the outer wall of the cylinder 1 so as to realize the fixed connection between the whole purifying device and the bed. The lower part of the cylinder body is fixed with a transfer tube 5, one end of the transfer tube 5 penetrates through the inner wall of the cylinder body 1 and is communicated with a cavity in the cylinder body 1, the other end of the transfer tube is opened to serve as an air inlet, and the air inlet is connected with an exhaust gas discharge port at the terminal of the engine 12 through a pipeline. The end part of the transfer tube 5 serving as an air inlet is connected with a first flange 6, and an inner hole of the first flange 6 is in interference fit with the outer wall of the transfer tube 5. The cover body 2 is connected to the opening of the upper part of the cylinder body 1 through bolts, and is convenient to install or detach. The cover body 2 is provided with an air outlet connected with the post-treatment assembly, a second flange 7 is connected to the position of the air outlet, and an inner hole of the second flange 7 is in interference fit with the outer wall of the air outlet. When bench test is carried out on different engine models, the first flange 6 and the second flange 7 of the air inlet and the air outlet are directly connected with corresponding parts respectively, compared with the conventional three-way catalytic converter for purifying tail gas, the method can prevent the phenomenon that the exhaust and tail gas devices are frequently replaced due to different structures of the whole engine emission accessories during mixed line production of the engine on the premise that the process emission indexes of the engine are not affected, and has the advantages of simple structure and easiness in maintenance.
The three-way catalytic assembly 3 and the heating assembly 4 are both arranged in the cylinder body 1, and the three-way catalytic assembly 3 comprises a shell and a purifying agent arranged in the shell. The heating component 4 is arranged below the three-way catalytic component 3, and the three-way catalytic component 3 is heated through the heating component 4, so that the purifying agent in the three-way catalytic component 3 is at the optimal catalytic temperature, and harmful gas in tail gas discharged by an engine is purified, and the purification efficiency and purification quality are ensured. Referring to fig. 9, if the purifying agent in the three-way catalytic assembly 3 reaches the service life, the cover body 2 is disassembled, the three-way catalytic assembly 3 is taken out from the cylinder body 1 to be replaced, and the three-way catalytic assembly 3 can be quickly assembled and disassembled, so that the purification device is convenient and quick. If the heating component 4 is damaged, the bench receives an alarm signal through the pins 43, the first flange 6 and the second flange 7 are manually disassembled, the purification device is taken down, the cover body 2 is opened, the three-way catalytic component 3, the limiting disc 9 and the heating rod 41 are sequentially taken out, and the heating rod 41 is maintained or replaced.
The heating assembly 4 comprises six heating rods 41 which are vertically arranged and a temperature control sensor 42 which is arranged at the lower end of the heating rods 41, and the upper ends of the heating rods 41 extend into the three-way catalytic assembly 3 to be in contact with the purifying agent. The bottom surface of the cylinder 1 is provided with first mounting holes 11 for fixing the respective mounting bars 41 of the heating assembly 4. The lower end of the heating component 4 is provided with a pin 43 connected with a power supply and an electric control component, so that the heating component 4 is continuously powered, and the heating component can be communicated with a temperature sensing signal of the heating rod 41, thereby achieving the purpose of temperature constant temperature control.
The heat insulation sleeve 10 is sleeved outside the heating rod 41, the heat insulation sleeve 10 is in a cylindrical shape with an upper opening and a lower opening, and the heat insulation sleeve 10 can isolate high temperature in the inner space of the heat insulation sleeve 10, so that the influence of the high temperature on the cylinder 1 and the outside of the cylinder 1 is weakened.
In order to prevent the heating rod 41 from shaking and ensure the position accuracy of the heating rod 41, two limiting plates 9 are arranged in the cylinder 1 at intervals along the up-down direction, and limiting holes 91 are arranged at positions of the limiting plates 9 corresponding to the heating rod 41.
The cover body 2 is provided with an installation part 21 protruding outwards, the installation part 21 is provided with a second installation hole 22 for fixing a temperature sensor, the second installation hole 22 penetrates through the inner wall of the cover body 1 to be communicated with an airflow passage, and the temperature of the gas treated by the purifying agent is measured through the temperature sensor.
Referring to fig. 10, the post-treatment assembly includes a pre-muffler 13, a post-muffler 14 and a fan 15, and the air flow discharged through the air outlet of the cover 2 sequentially enters the pre-muffler 13 and the post-muffler 14 to be mixed with air, and then is pumped and discharged to an outdoor pipeline through the fan 15, so that high-altitude discharge is realized, and the purposes of heat test tail gas purification, safety, heat insulation and emission reduction are achieved. The air inlet of barrel 1 passes through the exhaust emission mouth at pipeline and engine 12 terminal, is equipped with the heating element 4 that is used for heating ternary catalytic assembly 3 in the barrel 1, when guaranteeing the smooth and easy emission of engine terminal tail gas and the catalytic effect of purifying agent, has pulled open the distance of heating element 4 and engine 12 properly, has increased operating personnel and the distance of barrel 1 promptly, has avoided the mistake to touch and has caused the scald, has improved the security, has guaranteed simultaneously can not harm the engine body in the assembly process.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. An exhaust gas purification device for an engine test stand, characterized in that: the three-way catalytic device comprises a barrel (1), a cover body (2), a three-way catalytic assembly (3) and a heating assembly (4), wherein an air inlet is arranged at the lower part of the barrel (1), and the air inlet is connected with an exhaust emission port at the terminal of an engine (12) through a pipeline; the cover body (2) is detachably connected to the upper opening of the cylinder body (1), and the cover body (2) is provided with an air outlet connected with the post-treatment assembly; the three-way catalytic assembly (3) and the heating assembly (4) are arranged in the cylinder body (1), and the three-way catalytic assembly (3) is heated through the heating assembly (4) so that a purifying agent in the three-way catalytic assembly (3) is at the optimal catalytic temperature to purify harmful gases in tail gas discharged by an engine;
the ternary catalytic assembly (3) comprises a shell and a purifying agent arranged in the shell;
the heating assembly (4) is arranged below the three-way catalytic assembly (3) and comprises a plurality of heating rods (41) which are vertically arranged and a temperature control sensor (42) arranged at the lower end of the heating rods (41), and the upper ends of the heating rods (41) extend into the three-way catalytic assembly (3) to be in contact with the purifying agent; the heating device is characterized in that a first mounting hole (11) for fixing the heating component (4) is formed in the bottom surface of the cylinder body (1), and pins (43) connected with a power supply and an electric control component are arranged at the lower end of the heating component (4).
2. The exhaust gas purifying apparatus for an engine test bed according to claim 1, wherein: the heating rod (41) is sleeved with a heat insulation sleeve (10), and the heat insulation sleeve (10) is in a cylindrical shape with an upper opening and a lower opening.
3. The exhaust gas purifying apparatus for an engine test bed according to claim 1, wherein: two limiting plates (9) are arranged in the cylinder body (1) at intervals along the up-down direction, and limiting holes (91) are formed in positions, corresponding to the heating rods (41), of the limiting plates (9).
4. The exhaust gas purifying apparatus for an engine test bed according to claim 1 or 2, characterized in that: the cover body (2) is provided with an installation part (21) protruding outwards, the installation part (21) is provided with a second installation hole (22) for fixing the temperature sensor, and the second installation hole (22) penetrates through the inner wall of the cover body (2) to be communicated with the airflow passage.
5. The exhaust gas purifying apparatus for an engine test bed according to claim 1 or 2, characterized in that: the lower part of the cylinder body (1) is fixedly provided with a transfer pipe (5), one end of the transfer pipe (5) penetrates through the inner wall of the cylinder body (1) and is communicated with a cavity in the cylinder body (1), the other end of the transfer pipe is opened to serve as an air inlet, the end part of the transfer pipe (5) serving as the air inlet is connected with a first flange (6), and an inner hole of the first flange (6) is in interference fit with the outer wall of the transfer pipe (5);
the air outlet of the cover body (2) is connected with a second flange (7).
6. The exhaust gas purifying apparatus for an engine test bed according to claim 1 or 2, characterized in that: and a bracket (8) fixed with the engine test bed is arranged on the outer wall of the cylinder body (1).
7. The exhaust gas purifying apparatus for an engine test bed according to claim 1 or 2, characterized in that: the post-treatment assembly comprises a pre-muffler (13), a post-muffler (14) and a fan (15), wherein airflow discharged through an air outlet of the cover body (2) sequentially enters the pre-muffler (13) and the post-muffler (14) to be mixed with air, and then is pumped and discharged to an outdoor pipeline through the fan (15) to realize high-altitude discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210299792.1A CN114699914B (en) | 2022-03-25 | 2022-03-25 | Tail gas purifying device for engine test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210299792.1A CN114699914B (en) | 2022-03-25 | 2022-03-25 | Tail gas purifying device for engine test bed |
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| Publication Number | Publication Date |
|---|---|
| CN114699914A CN114699914A (en) | 2022-07-05 |
| CN114699914B true CN114699914B (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210299792.1A Active CN114699914B (en) | 2022-03-25 | 2022-03-25 | Tail gas purifying device for engine test bed |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2306471A1 (en) * | 1971-05-14 | 1974-08-29 | Chemical Construction Corp | DEVICE FOR CATALYTIC EXHAUST GAS TREATMENT |
| DE4230667C1 (en) * | 1992-09-14 | 1994-03-31 | Energietechnik Bremen Gmbh | Particle filter for diesel engine exhaust gas - has dividing wall in housing to give gas flows through channels each with a filter unit |
| CN104614185A (en) * | 2014-12-11 | 2015-05-13 | 中国北方发动机研究所(天津) | Engine emission test rack |
| CN206035600U (en) * | 2016-08-26 | 2017-03-22 | 天津杰特汽车三元催化器有限公司 | Removable formula three way catalyst converter |
| CN206309480U (en) * | 2016-11-03 | 2017-07-07 | 威迩徕德电力设备(上海)有限公司 | A kind of emission-control equipment |
| CN207499945U (en) * | 2018-04-02 | 2018-06-15 | 王博 | Vehicle exhaust efficient catalytic purifier |
| CN209237722U (en) * | 2018-11-30 | 2019-08-13 | 无锡市杜克环保科技有限公司 | A kind of exhaust gas cleaner for threst stand |
| CN110160795A (en) * | 2019-05-27 | 2019-08-23 | 武汉东测科技有限责任公司 | A kind of exhaust treatment system and its test method of gasoline engine machine frame |
-
2022
- 2022-03-25 CN CN202210299792.1A patent/CN114699914B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2306471A1 (en) * | 1971-05-14 | 1974-08-29 | Chemical Construction Corp | DEVICE FOR CATALYTIC EXHAUST GAS TREATMENT |
| DE4230667C1 (en) * | 1992-09-14 | 1994-03-31 | Energietechnik Bremen Gmbh | Particle filter for diesel engine exhaust gas - has dividing wall in housing to give gas flows through channels each with a filter unit |
| CN104614185A (en) * | 2014-12-11 | 2015-05-13 | 中国北方发动机研究所(天津) | Engine emission test rack |
| CN206035600U (en) * | 2016-08-26 | 2017-03-22 | 天津杰特汽车三元催化器有限公司 | Removable formula three way catalyst converter |
| CN206309480U (en) * | 2016-11-03 | 2017-07-07 | 威迩徕德电力设备(上海)有限公司 | A kind of emission-control equipment |
| CN207499945U (en) * | 2018-04-02 | 2018-06-15 | 王博 | Vehicle exhaust efficient catalytic purifier |
| CN209237722U (en) * | 2018-11-30 | 2019-08-13 | 无锡市杜克环保科技有限公司 | A kind of exhaust gas cleaner for threst stand |
| CN110160795A (en) * | 2019-05-27 | 2019-08-23 | 武汉东测科技有限责任公司 | A kind of exhaust treatment system and its test method of gasoline engine machine frame |
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| CN114699914A (en) | 2022-07-05 |
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