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Preparation method of heat exchanger with efficient heat exchange and corrosion resistance and provided with graphene protective membrane

A graphene and anti-corrosion technology, applied in the direction of graphene, single-layer graphene, damage protection, etc., can solve the problems of complex preparation, affecting life and use effect, insufficient adhesion, etc., and achieve simple and convenient preparation and excellent mechanical properties , Strong adhesion effect

Inactive Publication Date: 2017-06-06
GUANGDONG MACRO GAS APPLIANCE
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  • Claims
  • Application Information

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Problems solved by technology

However, its preparation is complicated and its adhesion is not enough, which affects the life and use effect

Method used

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  • Preparation method of heat exchanger with efficient heat exchange and corrosion resistance and provided with graphene protective membrane

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and embodiment the patent of the present invention will be further described.

[0019] Such as figure 1 Shown, the preparation method of the heat exchanger with graphene protective film with high heat exchange efficiency and anti-corrosion of the present invention The specific preparation method is as follows:

[0020] First, clean the copper tube: put it in acetone and boil it for 10 minutes, then put it in ethanol and boil it for 10 minutes, then clean it with deionized water, then soak it in glacial acetic acid for 10 minutes, then clean it with deionized water. The final step is to blow dry with nitrogen, which is to remove impurities such as organic matter and copper oxide that may be attached to the copper tube.

[0021] Next, graphene is grown on the surface of the copper tube, the growth temperature is set to 1000°C, a protective gas is introduced into the reaction chamber, and the temperature is rapidly raised to ...

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Abstract

The invention discloses a preparation method of a heat exchanger with efficient heat exchange and corrosion resistance and provided with a graphene protective membrane. The preparation method is characterized by comprising the following steps: (1) firstly cleaning a copper pipe; (2) growing graphene on the surface of the copper pipe: setting the growth temperature at 800 to 1,200 DEG C, feeding protective gas into a reaction chamber, quickly heating the reaction chamber to the growth temperature of the graphene, then feeding methane gas, keeping feeding the methane gas for 8 to 15 minutes, then quickly cooling the reaction chamber, and cutting the feeding of all types of gas, wherein the growth time of the graphene is equal to the methane feeding time; and (3) controlling the pressure of the reaction chamber at 8 to 15 mbar in a graphene preparation process, thus the high-quality graphene protective membrane is prepared on the surface of the copper pipe, and covers copper to prevent corrosion. The preparation method disclosed by the invention is proper in cost, suitable for large-batch production and relatively high in membrane forming quality.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to the technical field of heat exchangers with graphene protective films for gas water heaters. Background technique [0002] The heat exchange tubes of existing gas water heater heat exchangers are mostly made of oxygen-free copper. Copper is a metal material with a high thermal conductivity, with a thermal conductivity of 377W / m·K. However, the serpentine copper coil in the cross-flow heat exchanger is There is a large temperature difference in the direction of water flow. Such a temperature gradient is not conducive to heat transfer and will reduce the heat transfer performance of the heat exchanger. Moreover, if the water heater is used in poor water quality, the copper pipe will be corroded and cause water leakage. Although the developed stainless steel heat exchanger can better solve the problem of corrosion and water leakage of the heat exchanger, the thermal conduc...

Claims

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Application Information

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IPC IPC(8): F28F19/00C01B32/186
CPCC01B2204/02F28F19/00Y02P20/10
Inventor 余少言马科帅
Owner GUANGDONG MACRO GAS APPLIANCE
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