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A heat transfer element and enamel technology, which is applied in the field of enamel coating of enamel heat transfer elements, can solve the problems of sparse power lines, difficulty in coating enamel glaze, etc.
Inactive Publication Date: 2012-03-28
KUSN MEIBANG ENAMEL
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Abstract
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Problems solved by technology
The use of electrostatic dry spraying process can well wrap the edge of metal parts with enamel glaze. This is because of the Faraday effect of the electrostatic field. There will be relatively dense electric lines on the raised parts and edges of the workp
Method used
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Embodiment 1
[0022] (1) According to the following two proportioning schemes, chemical raw materials are weighed to make enamel for corrosion-resistant enamel heat transfer elements, SiO 2 30%~60%, Al2O3 2%~10%, B2O3 5%~20%, Fe2O3 1%~6%, Na2O 5%~15%, CoO 0.5%~5%, CuO2 0.5%~5%, TiO2 2 %~8%, MnO2 0.5%~5%, LiO 0~3%; then crush and mix the enamel evenly and melt it at a high temperature of 1100℃~1300℃. Dry the enamel frit for later use.
[0023] (2) Grind the enamel glaze obtained in step (1) and wrap it with a layer of high-resistivity silicone oil and other similar non-conductive substances for electrostatic wrapping treatment to make electrostatic enamel powder that can be sprayed with an electrostatic spray gun;
[0024] (3) Grinding the enamel glaze obtained in step (1) with water and clay with a specific gravity of 3% to 8% to make a glaze slurry that can be used for wet spraying;
[0025] (4) Spray the glaze slurry obtained in step (3) onto the grooves and grooves of the heat transfe...
Embodiment 2
[0029] (1) According to the following two proportioning schemes, chemical raw materials are weighed to make enamel for corrosion-resistant enamel heat transfer elements, SiO 2 30%~60%, Al2O3 2%~10%, B2O3 5%~20%, Fe2O3 1%~6%, Na2O 5%~15%, CoO 0.5%~5%, CuO2 0.5%~5%, TiO2 2 %~8%, MnO2 0.5%~5%, LiO 0~3%; then crush and mix the enamel evenly and melt it at a high temperature of 1100℃~1300℃. Dry the enamel frit for later use.
[0030] (2) Grind the enamel glaze obtained in step (1) and wrap a layer of high-resistivity silicone oil for electrostatic wrapping treatment to make electrostatic enamel powder that can be sprayed with an electrostatic spray gun;
[0031] (3) SiO in step (1) 2 The content is reduced by 5 to 10 percentage points, and then the obtained enamel frit is ground with water, 5% of quartz sand and 3% to 8% of clay to make a glaze slurry that can be used for wet spraying.
[0032] (4) Spray the glaze slurry obtained in step (3) onto the grooves and grooves of the ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention discloses an enamelling method of an enamel heat transfer element, comprising the following steps of: (1) preparing enamel frit for later use; (2) making an electrostatic enamel powder which can be sprayed by the use of an electrostatic spray gun; (3) making glaze slip which can be used for wet spraying; (4) spraying the glaze slip obtained from the step (3) on the heat transfer element's grooves and slots which are not easy to spray by an electrostatic dry method; (5) drying the heat transfer element sprayed by the step (4), sending the dried heat transfer element into an electrostatic spraying device, and spraying the electrostatic enamel powder by using the electrostatic spray gun; (6) sending the heat transfer element which has undergone the above steps into a high temperature enamelling kiln for sintering, and cooling to obtain enamel heat transfer element with anticorrosion performance. According to the workpiece sprayed by the enamelling method of the enamel heat transfer element, enamels are greatly wrapped by edges after sintering. In addition, the grooves of the heat transfer element are greatly coated with enamel. The enamelling method is suitable for various shapes and wave patterns.
Description
technical field [0001] The invention relates to an enamelling method, in particular to an enameling method for an enamel heat transfer element. Background technique [0002] Heat exchange enamel elements are currently mainly used in flue gas desulfurization, denitrification devices, and air preheaters of various thermal power plants. Due to the heat exchange efficiency issues involved, the enamel heat exchange elements will not be purely flat plates, but will be fabricated Plates with various wave modes, and the existence of these wave modes, put forward various requirements for the choice of enamel coating method. [0003] Enamel is a metal coated with one or more layers of inorganic vitreous materials on its surface. After high temperature, the surface coating is melted, so that complex physical and chemical changes occur, and the metal and its surface coating are firmly combined to form a kind of enamel. Composite material, which has both the mechanical strength and easy...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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