CN107469871B - Roasting method of automobile exhaust three-way catalyst - Google Patents
Roasting method of automobile exhaust three-way catalyst Download PDFInfo
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- CN107469871B CN107469871B CN201710689708.6A CN201710689708A CN107469871B CN 107469871 B CN107469871 B CN 107469871B CN 201710689708 A CN201710689708 A CN 201710689708A CN 107469871 B CN107469871 B CN 107469871B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
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- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Catalysts (AREA)
Abstract
The invention relates to the field of automobile exhaust purification, in particular to a roasting method of an automobile exhaust three-way catalyst, which comprises the steps of conveying a carrier loaded with a coating to an annular horizontal furnace passage for drying; then heating and roasting the peripheral wall of the carrier in the horizontal furnace path; then conveying the carrier to an inclined furnace channel; heating and roasting two ends of the carrier in the inclined furnace path; and outputting the roasted carrier. The invention firstly bakes the peripheral wall of the carrier in the horizontal furnace path, and then bakes the two ends of the carrier, thereby ensuring that the coating on the whole carrier is baked more uniformly, and further improving the performance of the catalyst.
Description
Technical Field
The invention relates to the field of automobile exhaust purification, in particular to a roasting method of an automobile exhaust three-way catalyst.
Background
The existing catalysts consist of a honeycomb-shaped ceramic or metal carrier and a catalyst coating attached to the carrier. The catalyst coating layer is generally composed of an oxide material (such as alumina) with a large specific surface area, an oxygen storage material, and a precious metal active component (often one or more of Pt (platinum), Pd (palladium), and Rh (rhodium)) dispersed on the surface of the oxide or oxygen storage material. The oxygen storage material is a composite oxide containing cerium and zirconium, and the proportion of oxidizing components and reducing components in the tail gas is adjusted by adsorbing oxygen in the stored tail gas or releasing oxygen, so that carbon monoxide and hydrocarbon oxygen are oxidized and nitrogen oxides are reduced. The prior three-way catalyst usually adopts a double-coating structure, and the coating is not uniform enough during roasting, so that the purification effect of the catalyst is not ideal.
Disclosure of Invention
Aiming at the technical problems, the invention provides a roasting method of an automobile exhaust three-way catalyst, which can ensure that the roasting of a coating is more uniform.
The technical scheme adopted by the invention for solving the technical problems is as follows: the roasting method of the automobile exhaust three-way catalyst comprises the following steps:
(1) conveying the carrier loaded with the coating to an annular horizontal furnace path for drying;
(2) then heating and roasting the peripheral wall of the carrier in the horizontal furnace path;
(3) then conveying the carrier to an inclined furnace channel;
(4) heating and roasting two ends of the carrier in the inclined furnace path;
(5) and outputting the roasted carrier.
Preferably, the carriers loaded with the coating are placed in an end-to-end manner on the conveyor path, and then the carriers at one end of the conveyor path are pushed into the horizontal furnace path.
Preferably, heating devices are uniformly distributed on the peripheral wall of the horizontal furnace channel.
Preferably, the horizontal furnace path comprises a drying area and a roasting area, and the carrier is dried in the drying area and then conveyed to the roasting area for heating and roasting.
Preferably, the lower end of the inclined furnace channel is provided with a roasting device.
Preferably, the inclined flues are radially rotatable.
According to the technical scheme, the peripheral wall of the carrier is roasted in the horizontal furnace channel, and then the two ends of the carrier are roasted, so that the roasting uniformity of the coating on the whole carrier can be ensured, and the performance of the catalyst is improved.
Detailed Description
The invention is described in detail below, with illustrative embodiments and descriptions of the invention provided herein to explain the invention without limiting it.
The roasting method of the automobile exhaust three-way catalyst comprises the following steps:
firstly, conveying a carrier loaded with a coating to an annular horizontal furnace path for drying; before this, a plurality of carriers loaded with coatings are placed on a conveying channel in an end-to-end mode, and then the carriers at one end of the conveying channel are pushed to enable the carriers at the other end of the conveying channel to enter the horizontal furnace channel, so that the conveying safety and convenience can be guaranteed, and the automatic production can be realized. The horizontal furnace path comprises a drying area and a roasting area, wherein a carrier is dried in the drying area and then conveyed to the roasting area for heating and roasting. Because the temperature difference between the drying area and the roasting area is large, the separation of the drying area and the roasting area is beneficial to improving the roasting efficiency on one hand and improving the roasting uniformity on the other hand.
Then, heating and roasting the peripheral wall of the carrier in the horizontal furnace path; because the horizontal furnace path adopts the annular layout and the heating devices are uniformly distributed on the peripheral wall of the horizontal furnace path, the uniformity of heating of the peripheral wall can be ensured, and the roasting of the peripheral wall of the carrier is more uniform. In the implementation process, because two adjacent carriers are connected end to end, the contact end part of the carriers can have the phenomenon of uneven roasting. Therefore, the invention conveys the carrier to the inclined furnace channel, so that the two ends of the carrier are heated and roasted in the inclined furnace channel, and the roasting uniformity of the whole carrier is improved.
In the implementation process, the lower end of the inclined furnace channel is provided with a roasting device, the carrier roasted by the horizontal furnace channel can automatically slide down along the inclined furnace channel through pushing, and in the sliding down process, the roasting device at the lower end of the inclined furnace channel can prevent the carrier from continuously sliding down and heat and roast the end part of the carrier contacted with the roasting device; and the inclined furnace path can rotate in the radial direction, namely after one end of the carrier is roasted, the other end of the carrier is contacted with the roasting device through rotation, so that the other end of the carrier is heated and roasted, and finally, the roasted carrier is output through rotating the inclined furnace path.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention.
Claims (4)
1. The roasting method of the automobile exhaust three-way catalyst comprises the following steps:
(1) conveying the carrier loaded with the coating to an annular horizontal furnace path for drying;
(2) then heating and roasting the peripheral wall of the carrier in the horizontal furnace path;
(3) then conveying the carrier to an inclined furnace channel;
(4) heating and roasting two ends of the carrier in the inclined furnace path;
(5) outputting the roasted carrier; and a roasting device is arranged at the lower end of the inclined furnace channel. The lower end of the inclined furnace channel is provided with a roasting device, the carrier roasted by the horizontal furnace channel automatically slides downwards along the inclined furnace channel after being pushed, and in the process of sliding downwards, the roasting device at the lower end of the inclined furnace channel can prevent the carrier from continuously sliding downwards and heat and roast the end part of the carrier contacted with the roasting device; and the inclined furnace path can rotate in the radial direction, after one end of the carrier is roasted, the other end of the carrier is contacted with the roasting device through rotation, so that the other end of the carrier is heated and roasted, and finally the roasted carrier is output through rotating the inclined furnace path.
2. The method for calcining the automobile exhaust three-way catalyst according to claim 1, characterized in that: and placing a plurality of carriers loaded with the coatings on the conveying channel in an end-to-end mode, and then pushing the carriers at one end of the conveying channel to enable the carriers at the other end of the conveying channel to enter the horizontal furnace channel.
3. The method for calcining the automobile exhaust three-way catalyst according to claim 1, characterized in that: heating devices are uniformly distributed on the peripheral wall of the horizontal furnace channel.
4. The method for calcining the automobile exhaust three-way catalyst according to claim 1, characterized in that: the horizontal furnace path comprises a drying area and a roasting area, wherein the carrier is dried in the drying area and then conveyed to the roasting area for heating and roasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689708.6A CN107469871B (en) | 2017-08-16 | 2017-08-16 | Roasting method of automobile exhaust three-way catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689708.6A CN107469871B (en) | 2017-08-16 | 2017-08-16 | Roasting method of automobile exhaust three-way catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107469871A CN107469871A (en) | 2017-12-15 |
| CN107469871B true CN107469871B (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710689708.6A Active CN107469871B (en) | 2017-08-16 | 2017-08-16 | Roasting method of automobile exhaust three-way catalyst |
Country Status (1)
| Country | Link |
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| CN (1) | CN107469871B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1417157A (en) * | 2001-11-09 | 2003-05-14 | 株式会社电装 | Making process and drier for honeycomb ceramic body |
| CN201697447U (en) * | 2010-05-04 | 2011-01-05 | 重庆普源化工工业有限公司 | Calcining device of nano-grade WO3/TiO2 functional materials |
| CN202734497U (en) * | 2012-07-16 | 2013-02-13 | 株式会社村田制作所 | Rotary heat treatment furnace |
| CN203550522U (en) * | 2013-10-28 | 2014-04-16 | 中国石油化工股份有限公司 | Rotary roaster for preparing load type catalyst carrier |
| CN103754889A (en) * | 2014-02-25 | 2014-04-30 | 连云港市东海县宏伟石英制品有限公司 | High-purity quartz sand purification method and special rotating device |
| CN204177232U (en) * | 2014-09-04 | 2015-02-25 | 南京钛白化工有限责任公司 | A kind of temperature measuring equipment for titanium dioxide calcining kiln |
| CN204630357U (en) * | 2015-03-18 | 2015-09-09 | 江苏贝丽得新材料有限公司 | A kind of pearlescent pigment calcining revolving burner |
| CN105688905A (en) * | 2016-04-27 | 2016-06-22 | 柳州申通汽车科技有限公司 | Preparation technology of automobile exhaust catalyst |
| CN105797744A (en) * | 2016-04-27 | 2016-07-27 | 柳州申通汽车科技有限公司 | Preparation process of automobile tail gas ternary catalyst |
| CN105890347A (en) * | 2016-04-29 | 2016-08-24 | 青岛智邦炉窑设计研究有限公司 | Rotary kiln type reduction roasting device and process |
-
2017
- 2017-08-16 CN CN201710689708.6A patent/CN107469871B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1417157A (en) * | 2001-11-09 | 2003-05-14 | 株式会社电装 | Making process and drier for honeycomb ceramic body |
| CN201697447U (en) * | 2010-05-04 | 2011-01-05 | 重庆普源化工工业有限公司 | Calcining device of nano-grade WO3/TiO2 functional materials |
| CN202734497U (en) * | 2012-07-16 | 2013-02-13 | 株式会社村田制作所 | Rotary heat treatment furnace |
| CN203550522U (en) * | 2013-10-28 | 2014-04-16 | 中国石油化工股份有限公司 | Rotary roaster for preparing load type catalyst carrier |
| CN103754889A (en) * | 2014-02-25 | 2014-04-30 | 连云港市东海县宏伟石英制品有限公司 | High-purity quartz sand purification method and special rotating device |
| CN204177232U (en) * | 2014-09-04 | 2015-02-25 | 南京钛白化工有限责任公司 | A kind of temperature measuring equipment for titanium dioxide calcining kiln |
| CN204630357U (en) * | 2015-03-18 | 2015-09-09 | 江苏贝丽得新材料有限公司 | A kind of pearlescent pigment calcining revolving burner |
| CN105688905A (en) * | 2016-04-27 | 2016-06-22 | 柳州申通汽车科技有限公司 | Preparation technology of automobile exhaust catalyst |
| CN105797744A (en) * | 2016-04-27 | 2016-07-27 | 柳州申通汽车科技有限公司 | Preparation process of automobile tail gas ternary catalyst |
| CN105890347A (en) * | 2016-04-29 | 2016-08-24 | 青岛智邦炉窑设计研究有限公司 | Rotary kiln type reduction roasting device and process |
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| Publication number | Publication date |
|---|---|
| CN107469871A (en) | 2017-12-15 |
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Effective date of registration: 20221229 Address after: 545616 room 2-2, 2nd floor, No.60 zhengtongdao, Luorong Town, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee after: Liuzhou Xinkai Chaohua Technology Co.,Ltd. Address before: 545000 Liudong New District, Liuzhou City, Guangxi Zhuang Autonomous Region, No. 2 Shuiwan Road, No. 2 Liudong Standard Factory Building, Second Floor 212 Patentee before: LIUZHOU SHENTONG AUTOMOBILE TECHNOLOGY Co.,Ltd. |