CN112908570A

CN112908570A - Special catalysis piece of enameling machine

Info

Publication number: CN112908570A
Application number: CN202110084705.6A
Authority: CN
Inventors: 刘哲士; 李竹霞
Original assignee: Cheng And New Material Technology Shanghai Co ltd
Current assignee: Cheng And New Material Technology Shanghai Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-06-04

Abstract

The invention discloses a special catalytic block for an enameling machine, which comprises porous metal foam and a high-temperature-resistant metal frame, wherein palladium-platinum (Pd-Pt) active metal is loaded on the foam metal of the porous metal foam, and the porous metal foam is stacked in the high-temperature-resistant metal frame. The invention can well burn hydrocarbon in the hearth, filter impurity stains, reduce the surface particle and pinhole performance of the enameled wire and greatly improve the yield of the enameled wire. Compared with other catalytic blocks, the content of TVOC in the catalyzed tail gas is greatly reduced, and the emission standard can be met.

Description

Special catalysis piece of enameling machine

Technical Field

The invention relates to the technical field of enamelling machine catalytic blocks, in particular to a catalytic block special for an enamelling machine.

Background

In the production of the enameled wire, the insulating varnish is solidified into a solid from a liquid state, and the two processes are carried out, wherein the first process is to heat and evaporate a solvent in the insulating varnish, and the second process is to carry out a polymerization reaction on insulating varnish resin at a high temperature to generate a varnish film. Both processes require heat, and the evaporated solvent is basically organic solvent such as cresol, xylene and the like, and if the solvent is directly discharged, the environment is greatly influenced. Therefore, the solvent needs to generate carbon dioxide and water through catalytic combustion, the carbon dioxide and the water are discharged into the air, and heat generated by combustion is taken into the furnace to provide energy for solidification and evaporation through a hot air circulation mode.

At present, catalytic blocks for catalytic combustion of enamelling machine solvents in the market are basically of a Pd-Pt structure, but carriers mainly have two forms, one is a ceramic catalytic block which is formed by loading Pd-Pt on porous ceramics, but because the specific surface area of the ceramics is small, the ceramics are easy to weather and crack under the conditions of high temperature and high wind speed, the catalytic blocks cannot be used on high-speed enamelling machines all the time. The other is metal foil, namely Pd-Pt is loaded on a high-temperature resistant metal foil, then the metal foil is stacked up, and the metal foil is fixed into a certain shape by a metal net outside for use.

Disclosure of Invention

Objects of the invention

In order to solve the technical problems in the background art, the invention provides the special catalytic block for the enamelling machine, which can well and fully burn organic matters in a solvent, provide a large amount of energy for resin curing and solvent evaporation, simultaneously can filter impurity stains in a hearth, and reduce the possibility that furnace flue dust is attached to an enamelled wire, thereby reducing particles on the surface of the enamelled wire and pinholes generated by the particles on the surface of the enamelled wire, improving the production efficiency and the yield, simultaneously greatly reducing the content of TVOC in exhaust gas to the emission standard, and directly discharging the exhaust gas without investing capital to treat the exhaust gas.

(II) technical scheme

The invention provides a special catalytic block for an enameling machine, which comprises porous metal foam and a high-temperature-resistant metal frame, wherein palladium-platinum (Pd-Pt) active metal is loaded on the foam metal of the porous metal foam, and the porous metal foam is stacked in the high-temperature-resistant metal frame.

Preferably, the foam metal is a porous alloy material, and the pore diameter of the foam metal ranges from 0.5 mm to 10 mm.

Preferably, the porosity of the porous alloy material is greater than 75%.

Preferably, the palladium-platinum (Pd-Pt) active metal is supported on the foam metal by electroplating, coating, soaking or alloying.

Preferably, the porous metal foam is stacked in the refractory metal frame by means including adhesive bonding or lamination.

Compared with the prior art, the invention has the beneficial effects that:

the temperature of the catalytic block after catalysis and before catalysis is 10-50 ℃ higher than that of the similar product, and the additional electric heating is reduced by 10-50%.

The TVOC content of the catalyzed tail gas of the catalytic block is obviously reduced compared with other catalytic blocks, and the catalytic block can meet the emission standard.

The catalytic block can well filter the impurity stains in the hearth, reduce the surface particles and pinhole performance of the enameled wire and greatly improve the yield of the enameled wire.

Drawings

FIG. 1 is a schematic representation of the catalytic temperature using the present catalytic block in the present invention;

FIG. 2 is a graphical representation of tail gas content of a catalytic block used in the present invention;

FIG. 3 is a graphical representation of the surface particle and pinhole performance of a wire coated with the present catalytic mass in accordance with the present invention.

Fig. 4 is a schematic structural diagram of the present invention.

In the figure: 1. a high temperature resistant metal frame; 2. a porous metal foam.

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.

Referring to fig. 1 to 4, the catalytic block for the enameling machine according to the present invention includes a porous metal foam 2 and a high temperature resistant metal frame 1, wherein a palladium-platinum (Pd-Pt) active metal is loaded on a foam metal of the porous metal foam 2, and the porous metal foam 2 is stacked in the high temperature resistant metal frame 1.

In an alternative embodiment, the metal foam is a porous alloy material with pore sizes in the range of 0.5-10 mm.

In an alternative embodiment, the porous alloy material has a porosity greater than 75%.

In an alternative embodiment, the palladium-platinum (Pd-Pt) active metal is supported on the foam metal by plating, coating, soaking or alloying.

In an alternative embodiment, the manner in which the porous metal foam 2 is stacked within the refractory metal frame 1 includes adhesive bonding or lamination stacking.

The working principle is as follows: the traditional catalytic block for the enamelling machine is that Pd-Pt is loaded on ceramic, but the ceramic has small specific surface area and is easy to differentiate and crack under the conditions of high temperature and high wind speed, so the catalytic block can not be used on the high-speed enamelling machine; the other is metal foil, namely Pd-Pt is loaded on a high-temperature resistant metal foil, then the metal foil is stacked, and the metal foil is fixed into a certain shape by a metal net outside for use, the catalytic block has the advantages of durability, but the catalytic block has the defects of small specific surface area, non-uniform pore diameter and high ignition temperature, and in the embodiment, the characteristics of large specific surface area, high porosity and uniform pore diameter of the foam metal are utilized, so that the catalytic block is particularly suitable for production of enameled wires;

the concrete expression is as follows:

energy is saved, and by using the catalytic block, the temperature after catalysis is reduced by 10-50 ℃ and before catalysis is reduced by 10-50% compared with the temperature of similar products, and the additional electric heating is reduced by 10-50%;

the catalytic block is environment-friendly, and the content of TVOC in the catalyzed tail gas is obviously reduced compared with other catalytic blocks, so that the emission standard can be met;

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The special catalytic block for the enameling machine is characterized by comprising porous metal foam and a high-temperature-resistant metal frame, wherein palladium-platinum (Pd-Pt) active metal is loaded on foam metal of the porous metal foam, and the porous metal foam is stacked in the high-temperature-resistant metal frame.

2. The enamelling machine specific catalyst block according to claim 1, wherein the foamed metal is a porous alloy material, and the pore size range of the foamed metal is 0.5-10 mm.

3. The enamelling machine-specific catalyst block according to claim 2, wherein the porosity of the porous alloy material is greater than 75%.

4. The enamelling machine-specific catalyst block according to claim 1, wherein the palladium-platinum (Pd-Pt) active metal is supported on the foam metal by plating, coating, soaking or alloying.

5. The enamelling machine-specific catalyst block of claim 1, wherein the porous metal foam is stacked in the refractory metal frame by means of bonding or lamination.