Large-sized oil conduit anti-corrosive coating curing oven
An anti-corrosion coating and curing furnace technology, applied in the field of furnaces or kilns, can solve the problems of unsatisfactory heating uniformity of curing furnaces, increased production costs, and inability to achieve stepped heating.
Inactive Publication Date: 2011-06-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
However, none of the existing curing furnaces can achieve stepwise temperature rise, and the pipe is in a high-temperature environment after entering the furnace, which greatly affects the adhesion of the paint
Since the downhole pipe is generally long (more than 10 meters) and thick (more than 100mm in diameter), the heating uniformity of the existing curing furnace is not ideal, and it cannot meet the requirement that the temperature difference along the length and radial direction of the pipe is less than 3°C
In addition, none of the existing curing furnaces can handle various toxic gases released from the spray paint during the drying process, which cannot meet the requirements of environmental protection. A separate environmental protection device needs to be installed, which increases the production cost
Method used
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[0021] Referring to Fig. 1, the burner 5 among the present invention is positioned at the bottom of the burn-back pipe 6 and is connected with the combustion chamber 31, the bottom of the chimney 9 is connected with the heat exchanger 7, and the circulating air pipe 10 is connected from the top of the curing furnace 1, and from the curing furnace 1 From top to bottom are the air equalizing plate 11, the air distribution plate 2, the heat conducting oil pipe 3, and the air distributing pipe 4. The heat conducting oil pipe 3 forms a circulating oil circuit through the oil pump 22 and the oil pipe in the heat exchanger 7.
[0022] Referring to Fig. 2, there are two dividing plates 15, which divide the assimilation furnace into three temperature rise zones, namely a low temperature rise zone 16, a medium temperature rise zone 17 and a constant temperature rise zone 18 (the number of temperature rise zones can be adjusted). The circulating air is sent into the low temperature rise z...
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A large-sized oil pipe anticorrosive coating curing oven is used for solving the curing treatment problem of well oil pipe anticorrosive paint. The technical solution is that the curing oven comprises a combustion chamber, a heat exchanger and a curing oven connected with the chimney of the combustion chamber. The curing oven is internally provided with a conveying device for conveying work pieces and divided into multiple temperature raising zones along the conveying direction of the work pieces. Baffle plates are arranged among adjacent temperature raising zones and the bottom of each temperature raising zone is uniformly provided with air distributing pipes on which air equalising holes are uniformly distributed. The air inlet thereof is connected with the air outlet at the top of the curing oven by a circulating fan outside the curing oven. Heat-conducting oil pipes are uniformly distributed above the air distributing pipes and form a circulating oil passage together with the oil piles in the heat exchanger by an oil pump. The invention can not only realize gradient temperature raising and even heating and effectively ensure paint film quality, not discharging poisonous gas and meeting the requirements on environmental protection.
Description
technical field [0001] The invention relates to a large-scale curing furnace for curing the anticorrosion coating of downhole oil pipes in oil fields, and belongs to the technical field of furnaces or kilns. Background technique [0002] After spraying anti-corrosion paint on the surface of downhole tubing in the oil field, it is generally dried in a curing oven. The drying process directly affects the adhesion of the anti-corrosion paint and is a key factor determining the service life of the tubing. [0003] At present, there are many types of curing furnaces used at home and abroad to cure the anti-corrosion coating of downhole tubing in oil fields, such as the vertical circular coil heating and curing furnace and the horizontal circular coil heating and curing furnace designed by Italy Ggarioni&Naval Company, The four-pass vertical circular coil heating and curing furnace produced by Fulton Company of the United States, the tube frame oil curing heating furnace produced ...
Claims
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IPC IPC(8): B05D3/02F26B15/12F26B3/02
Inventor 王春波危日光付东陈鸿伟
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)