阅读说明：本技术 一种合金材料作为催化剂载体的制作方法及其在用于汽车尾气处理上的应用 (Manufacturing method of alloy material as catalyst carrier and application of alloy material in automobile exhaust treatment ) 是由 孙海涛 祁晓东 刘强 陆伟峰 曹禺 于涛 路路 于 2020-12-14 设计创作，主要内容包括：本发明公开了一种合金材料作为催化剂载体的制作方法及其在用于汽车尾气处理上的应用,属于汽车尾气处理技术领域,步骤1：步骤2：涂敷催化剂,步骤3：组装对齐：步骤4：载体固定：步骤5：组装成套：包括以下的处理方法：使用常温气流,将LPG喷入加热器的空气流入管道内与空气混合后进入催化器载体,使催化器载体的两个电极接通电源,催化器载体对气态HC产生了氧化作用,所述第二温度传感器得到的温度上升到500℃,而第三温度传感器测量的温度未上升；在发动机排气气流温度下,该合金材料作为催化剂载体的制作方法及其在用于汽车尾气处理上的应用,生产成本低,使用效果好。(The invention discloses a method for manufacturing an alloy material as a catalyst carrier and application of the alloy material in automobile exhaust treatment, belonging to the technical field of automobile exhaust treatment and comprising the following steps of 1: step 2: coating a catalyst, and step 3: assembling and aligning: and 4, step 4: carrier fixation: and 5: assembling into a whole set: the processing method comprises the following steps: the method comprises the following steps that normal-temperature airflow is used, LPG is sprayed into an air inflow pipeline of a heater, the LPG is mixed with air and then enters a catalyst carrier, two electrodes of the catalyst carrier are connected with a power supply, the catalyst carrier generates an oxidation effect on gaseous HC, the temperature obtained by a second temperature sensor rises to 500 ℃, and the temperature measured by a third temperature sensor does not rise; the alloy material is used as a manufacturing method of a catalyst carrier and an application thereof in automobile exhaust treatment at the temperature of engine exhaust gas flow, and has low production cost and good use effect.)

1. A method for manufacturing an alloy material as a catalyst carrier is characterized in that: the method comprises the following steps:

step 1: blank making and molding, namely prefabricating a mold of the conductor (11), arranging a circular cavity in the mold, arranging a rectangular convex part on the edge of the cavity, arranging a partition plate in the cavity of the mold, forming a groove body in the conductor (11) by using the partition plate, injecting metal liquid into the mold, and taking out the prepared conductor (11) for later use after cooling;

forming the foam alloy body (12), namely adding a foaming agent into alloy powder, pouring the alloy powder into a mould, sintering the alloy powder, and volatilizing the foaming agent to enable the foam alloy body (12) to form a pore foam-shaped structure; the shape of the foam alloy body (12) after cooling is the same as the shape of the electric conductor (11);

step 2: coating a catalyst, namely uniformly coating the catalyst on the surface of the foam alloy body (12) after cooling and forming, and standing for later use;

and step 3: assembling and aligning: the cooled conductor (11) and the foam alloy body (12) are mutually attached, the conductor (11) is placed above the foam alloy body (12), and the conductor (11) is aligned with the groove bodies in the foam alloy body (12);

and 4, step 4: carrier fixation: attaching and pressing the electric conductor (11) and the foam alloy body (12) by using a carrier clamp (13) for fixing a carrier, attaching a fixed upper plate of the carrier clamp (13) to the upper end surface of a convex part of the electric conductor (11), simultaneously attaching a fixed lower plate of the carrier clamp (13) to the lower end surface of the convex part of the foam alloy body (12), screwing and fixing the fixed upper plate and the fixed lower plate by using bolts, and fixing the electric conductor (11) and the foam alloy body (12) into a catalyst carrier (1);

and 5: assembling into a whole set: the fixed catalyst carrier (1) is arranged in the filter element (5), a carrier clamp (13) is placed in a gap of the filter element (5) when the catalyst carrier is placed in the filter element (5), a power line is connected to a bolt of the carrier clamp (13), the filter element (5) is arranged in the heater (3), a first temperature sensor (21) is arranged on an air inflow channel of the catalyst carrier (1) in the heater (3), and a second temperature sensor (22) is arranged on the catalyst carrier (1); a third temperature sensor (23) is provided in the air outflow passage of the catalyst carrier (1) in the heater (3).

2. The method for manufacturing a catalyst carrier made of an alloy material according to claim 1, wherein the method comprises the following steps: the foaming agent is NH4 Cl.

3. The method for manufacturing a catalyst carrier made of an alloy material according to claim 1, wherein the method comprises the following steps: the catalyst is made of a noble metal material.

4. The method for manufacturing a catalyst carrier made of an alloy material according to claim 1, wherein the method comprises the following steps: in the step 5, when a plurality of catalyst carriers (1) need to be installed, the catalyst carriers are sequentially increased from the lower part, and the adjacent two catalyst carriers (1) are separated by a partition plate.

5. The method for manufacturing a catalyst carrier made of an alloy material according to claim 1, wherein the method comprises the following steps: and an electrode protection cover (51) is arranged on the notch of the filter element (5).

6. The method for manufacturing a catalyst carrier made of an alloy material according to claim 1, wherein the method comprises the following steps: the catalyst carrier (1) uses two electrical conductors (11) and two foamed alloy bodies (12).

7. An application of an alloy material as a catalyst carrier in the treatment of automobile exhaust.

8. The use of an alloy material according to claim 7 as a catalyst carrier in the treatment of automobile exhaust gases, wherein: the method comprises the following steps:

the method comprises the following steps that normal-temperature airflow is used, LPG is sprayed into an air inflow pipeline of a heater (3) to be mixed with air and then enters a catalyst carrier (1), two electrodes of the catalyst carrier (1) are powered on, the catalyst carrier (1) has an oxidizing effect on gaseous HC, the temperature obtained by a second temperature sensor (22) rises to 500 ℃, and the temperature measured by a third temperature sensor (23) does not rise;

under the temperature of the exhaust gas flow of an engine, after two electrodes of the catalyst carrier (1) are powered on, the catalyst carrier (1) purifies CO in the tail gas, and after the power is turned off, the CO in the tail gas is recovered to the initial state;

at the temperature of the exhaust gas flow of an engine, after two electrodes of a catalyst carrier (1) are electrified, diesel oil is sprayed into an air inflow pipeline of a heater (3), the catalyst carrier (1) generates oxidation effect on the diesel oil, the temperature of a second temperature sensor (22) rises to 600 ℃, the fuel oil injection is stopped, after a power supply is turned off, the concentration of the diesel oil rises again, and the diesel oil adsorbed on the air inflow pipeline and the air outflow pipeline and on the surface of the catalyst carrier (1) can not be oxidized and discharged from a tail pipe.

Technical Field

The invention belongs to the technical field of automobile exhaust treatment, and particularly relates to a manufacturing method of an alloy material as a catalyst carrier and application of the alloy material in automobile exhaust treatment.

Background

In the existing technology for controlling pollutant emission reduction in automobile exhaust emission, an exhaust catalytic treatment technology is adopted, namely a catalytic converter is arranged in an automobile exhaust emission pipe, the optimal working temperature of a catalyst is above 250 ℃, and otherwise, the catalytic conversion effect cannot be achieved; in the actual situation, under the working conditions of cold start, restart after intermittent stop, short stop, idling and small load of an automobile, the exhaust emission temperature is generally lower than 250 ℃, most of catalysts do not work or have extremely small effect, so that the exhaust emission pollution generally exists in a large quantity, the existing catalyst carriers are made of resistance wires and heating ceramics, but the resistance wires and the like are not uniformly heated, the heating speed is low, and the like.

Disclosure of Invention

The invention aims to provide a manufacturing method of an alloy material as a catalyst carrier and application of the alloy material in automobile exhaust treatment, so as to solve the problem of uneven heating of the catalyst carrier.

In order to achieve the purpose, the invention provides the following technical scheme: a method for manufacturing an alloy material as a catalyst carrier comprises the following steps:

step 1: preparing a blank and forming, namely prefabricating a mold of the electric conductor, arranging a circular cavity in the mold, arranging a rectangular convex part on the edge of the cavity, arranging a partition plate in the cavity of the mold, forming a groove body in the electric conductor by using the partition plate, injecting metal liquid into the mold, and taking out the prepared electric conductor for later use after cooling;

forming a foam alloy body, namely adding a foaming agent into alloy powder, pouring the alloy powder into a mould, sintering and volatilizing the foaming agent to form a porous foam-like structure; the shape of the foam alloy body after cooling is the same as that of the electric conductor;

step 2: coating a catalyst, namely uniformly coating the catalyst on the surface of the cooled and formed foam alloy, and standing for later use;

and step 3: assembling and aligning: the cooled conductor and the foam alloy body are mutually attached, the conductor is placed above the foam alloy body, and the conductor and the groove body in the foam alloy body are aligned;

and 4, step 4: carrier fixation: the electric conductor and the foam alloy body are tightly jointed by a carrier clamp for fixing the carrier, a fixing upper plate of the carrier clamp is jointed on the upper end surface of a convex part of the electric conductor, a fixing lower plate of the carrier clamp (13) is jointed on the lower end surface of the convex part of the foam alloy body, the fixing upper plate and the fixing lower plate are screwed and fixed by bolts, and the electric conductor and the foam alloy body are fixed into a catalyst carrier;

and 5: assembling into a whole set: the fixed catalyst carrier is loaded into the filter element, when the catalyst carrier is loaded into the filter element, the carrier clamp is placed in the gap of the filter element, the power cord is connected to the bolt of the carrier clamp, the filter element is installed in the heater, a first temperature sensor is arranged on an air inflow channel of the catalyst carrier in the heater, and a second temperature sensor is arranged on the catalyst carrier; a third temperature sensor is provided in the air outflow passage of the catalyst carrier in the heater.

Preferably, the blowing agent is NH4 Cl.

Preferably, the material of the catalyst is a noble metal material.

Preferably, in the step 5, when a plurality of catalyst carriers need to be installed, the catalyst carriers are sequentially increased from the lower part and are separated by a partition plate between two adjacent catalyst carriers.

Preferably, an electrode protection cover is arranged on the notch of the filter element.

Preferably, the catalyst carrier uses two electrical conductors and two foamed alloy bodies.

The application of the alloy material as a catalyst carrier in the treatment of automobile exhaust comprises the following treatment methods:

the method comprises the following steps that normal-temperature airflow is used, LPG is sprayed into an air inflow pipeline of a heater, the LPG is mixed with air and then enters a catalyst carrier, two electrodes of the catalyst carrier are connected with a power supply, the catalyst carrier generates an oxidation effect on gaseous HC, the temperature obtained by a second temperature sensor rises to 500 ℃, and the temperature measured by a third temperature sensor does not rise;

under the temperature of the exhaust gas flow of the engine, after two electrodes of a catalyst carrier are connected with a power supply, the catalyst carrier purifies CO in the tail gas, and after the power supply is turned off, the CO in the tail gas is recovered to an initial state;

at the temperature of the exhaust gas flow of the engine, after two electrodes of the catalyst carrier are electrified, diesel oil is sprayed into the air inflow pipeline of the heater, the catalyst carrier generates oxidation action on the diesel oil, the temperature of the second temperature sensor rises to 600 ℃, the fuel oil injection is stopped, the diesel oil concentration rises again after the power supply is turned off, and the diesel oil adsorbed on the air inflow pipeline and the air outflow pipeline and on the surface of the catalyst carrier cannot be oxidized and discharged from the tail pipe.

The invention has the technical effects and advantages that: the preparation method of the alloy material as the catalyst carrier and the application of the alloy material in automobile exhaust treatment have the advantages of low production cost and good use effect, compared with a resistance wire heating ceramic carrier, the direct electrifying heating of the catalyst is realized, the heating effect is improved, and the emission of pollutants in automobile exhaust is reduced when the alloy material is used in automobile exhaust treatment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a graph of an experiment conducted on gaseous HC according to the present invention;

FIG. 3 is a graph of an experiment on CO oxidation according to the present invention;

FIG. 4 is a graph of an oxidation experiment of diesel fuel according to the present invention;

FIG. 5 is a structural view of a catalyst carrier body of the invention;

FIG. 6 is a block diagram of a cartridge of the present invention;

fig. 7 is a structural view of the catalyst carrier of the invention.

In the figure: 1. a catalyst carrier; 21. a first temperature sensor; 22. a second temperature sensor; 23. a third temperature sensor; 3. a heater; 4. an electrode; 5. a filter element; 51. an electrode protection cover; 11. an electrical conductor; 12. a foamed alloy body; 13. and (3) a carrier clamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a method for manufacturing an alloy material as a catalyst carrier and application thereof in automobile exhaust treatment, which comprises the following steps: step 1: blank making and molding, namely prefabricating a mold of the conductor 11, arranging a circular cavity in the mold, arranging a rectangular convex part on the edge of the cavity, arranging a partition plate in the cavity of the mold, forming a groove body in the conductor 11 by using the partition plate, injecting metal liquid into the mold, and taking out the prepared conductor 11 for later use after cooling; forming the foamed alloy body 12, namely adding a foaming agent into the alloy powder, wherein the foaming agent is NH4Cl in the embodiment, pouring the foaming agent into a mold, sintering the foaming agent, and volatilizing the foaming agent to enable the foamed alloy body 12 to form a porous foamed structure; as shown in fig. 5, the shape of the foamed alloy body 12 after cooling is the same as the shape of the electrical conductor 11;

step 2: coating a catalyst, namely uniformly coating the catalyst on the surface of the cooled and molded foam alloy body 12, wherein the catalyst is made of a noble metal material and stands for later use in the embodiment;

and step 3: assembling and aligning: attaching the cooled conductor 11 and the foam alloy body 12 to each other, placing the conductor 11 above the foam alloy body 12, and aligning the conductor 11 with the groove body in the foam alloy body 12;

and 4, step 4: carrier fixation: attaching and pressing the electric conductor 11 and the foam alloy body 12 by using a carrier clamp 13 for fixing a carrier, attaching a fixing upper plate of the carrier clamp 13 to the upper end surface of a convex part of the electric conductor 11, simultaneously attaching a fixing lower plate of the carrier clamp 13 to the lower end surface of the convex part of the foam alloy body 12, screwing and fixing the fixing upper plate and the fixing lower plate through bolts, and fixing the electric conductor 11 and the foam alloy body 12 into a catalyst carrier 1; in the present embodiment, the catalyst carrier 1 uses two electrical conductors 11 and two foamed alloy bodies 12;

and 5: assembling into a whole set: the fixed catalyst carrier 1 is put into the filter element 5, the carrier clamp 13 is placed in the gap of the filter element 5 when the catalyst carrier is put in, in order to improve the efficiency of catalysis, a plurality of groups of catalyst carriers are used, when a plurality of catalyst carriers 1 need to be installed, the catalyst carriers are sequentially increased from the lower part, the adjacent two catalyst carriers 1 are separated by a partition plate, a power cord is connected to a bolt of the carrier clamp 13, the filter element 5 is installed in the heater 3, in order to improve the safety, an electrode protection cover 51 is arranged on the gap of the filter element 5, a first temperature sensor 21 is arranged on an air inflow channel of the catalyst carrier 1 in the heater 3, and a second temperature sensor 22 is arranged on the catalyst carrier 1; a third temperature sensor 23 is provided in the air outflow passage of the catalyst carrier 1 in the heater 3.

The application of the alloy material as a catalyst carrier in the treatment of automobile exhaust comprises the following treatment methods: the two electrodes of the catalyst carrier are respectively connected with the positive electrode and the negative electrode of a power supply; a first temperature sensor 21 for acquiring a temperature of an inlet gas flow of the catalyst carrier 1; a second temperature sensor 22 is arranged on the catalyst carrier; a third temperature sensor 23 for acquiring the temperature of the catalyst carrier outlet gas flow; the foam alloy material as a catalyst carrier 1 has the characteristics of large specific surface area, customizable specification, certain toughness, low heat capacity, conductivity and the like, and the foam alloy DOC oxidizes gaseous HC: as shown in fig. 2, in which T1 represents the temperature value obtained by the first temperature sensor 21, T2 represents the temperature value obtained by the second temperature sensor 22, T3 represents the temperature value obtained by the third temperature sensor 23, and LPG represents the C3H8 concentration, when the temperature of the normal temperature air flow is about 30 ℃, LPG (the main component is C3H 8) is injected into the air inflow pipe of the heater 3 to be mixed with air and then enter the catalyst carrier 1, and then the noble metal-coated foam alloy is energized, in the experiment of this embodiment, DC 24V is used, the catalyst produces significant oxidation effect on the gaseous HC, the temperature of the catalyst carrier 1 rapidly rises to approximately 500 ℃, and the temperature of the catalyst outlet air flow does not greatly rise;

oxidation of CO by heated foam alloy DOC: as shown in fig. 3, where T1 represents the temperature value obtained by the first temperature sensor 21, T2 represents the temperature value obtained by the second temperature sensor 22, T3 represents the temperature value obtained by the third temperature sensor 23, and CO represents the concentration of the gaseous pollutants, the foam alloy coated with the noble metal is electrified at a temperature of about 160 ℃ lower than that of the engine exhaust gas flow, the catalyst has a remarkable purifying effect on CO in the exhaust gas after DC 24V is adopted in the experiment of the present embodiment, the conversion efficiency in the experiment of the present embodiment is about 50%, and the CO in the exhaust gas is substantially recovered to the initial state after the power supply is turned off.

Oxidation of diesel oil by heating type foam alloy DOC: as shown in fig. 4, in which T1 represents the temperature value obtained by the first temperature sensor 21, T2 represents the temperature value obtained by the second temperature sensor 22, T3 represents the temperature value obtained by the third temperature sensor 23, and THC represents the diesel oil concentration, the noble metal-coated foam alloy was energized at a temperature of about 160 ℃ in the low engine exhaust gas flow, DC 24V was used in the experiment of this example, and then diesel oil (HC) was injected into the air inflow pipe into the injection heater 3, which produces a significant oxidation effect on HC, the temperature of the catalyst carrier 1 rapidly increased to about 600 ℃, and after the fuel injection was stopped and the power supply was turned off, the HC concentration again increased, and the diesel oil adsorbed on the air inflow pipe, the air outflow pipe, and the surface of the catalyst carrier 1 could not be oxidized and discharged from the tail pipe.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.