Defrosting pipeline for petrochemical gas heat exchanger
A technology of heat exchangers and defrosting tubes, applied in defrosting, indirect heat exchangers, heat exchanger types, etc., can solve the problems of slow air defrosting and costing a lot of defrosting
Inactive Publication Date: 2009-01-14
JUI HUNG REFRIGERATION TECH
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Problems solved by technology
[0010] The above-mentioned defrosting methods have their own advantages and disadvantages, but if the heat exchanger is used in the recovery of petrochemical oil and gas, under the premise of safety, only air defrosting and water defrosting can be used, and water defrosting will cost a lot of energy. It is not suitable for island countries with insufficient water sources; however, the defrosting speed of traditional air defrosting is slow; and the odd use environment is that the internal temperature of the heat exchanger is greater than or equal to 2°C and the temperature of the refrigerant is less than 0°C. For oil and gas, it must be In the case of complete liquefaction at around -30°C, this defrosting method obviously cannot be directly used by heat exchangers in this field
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[0038] The defrosting pipeline of the heat exchanger of the preferred implementation structure of the present invention is used for volatile or flammable petrochemical gases; as shown in Figure 1 Figure 1A As shown, the defrosting pipeline includes a bypass pipeline 1 with a blocking valve 12 and a gas disturbance device 14; The pipe 231 is connected, and the output end 18 is connected to the intake and exhaust pipe 241 between the first heat exchanger 21 and the second heat exchanger 22; in addition, the second heat exchanger 22 is connected to the third heat exchanger 23 An inlet and exhaust pipe 243 , and the steam or oil gas to be treated is introduced through the inlet pipe 211 of the first heat exchanger 21 .
[0039] The above-mentioned defrosting pipeline of the heat exchanger is applied to the shutdown defrosting mode, that is, when the input of steam and the supply of refrigerant into each heat exchanger are stopped, the blocking valve 12 is opened and the gas distur...
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The invention relates to a defrosting pipe of heat exchanger for petrochemical gas, used in volatile or combustible petrochemical gas. A bypassing pipe is connected with several heat exchangers in the defrosting pipe. The bypassing pipe comprises a blocking valve or multi-directional valve, and a gas disturbance device. One end of the bypassing pipe is connected with the exhaust pipe of heat exchanger where the gas is discharged finally and the other end is connected with the air inlet pipe of heat exchanger where the gas enters originally or connected with the air in-out connecting pipe of two heat exchangers. Via this, under the model of interactive defrosting in shutdown for defrosting or one side of operation and the other side of shutdown, the gas disturbance device is started to disturb the gas in heat exchanging pipe bank; heat energy generated by the disturbance is used to eliminate the frost on the surface of pipe bank so as to achieve safe and effective defrosting effect.
Description
technical field [0001] The invention relates to a defrosting pipeline of a heat exchanger, in particular to a defrosting pipeline of a heat exchanger used for treating polluted or volatile gases in petrochemical and other fields. It uses at least two groups of fin-tube heat exchangers with different temperature ranges or the same temperature range, using a gas disturbance device such as a blower to force the gas in the heat exchanger to circulate, thereby achieving a safe and effective heat exchanger defrosting effect. Background technique [0002] When the heat exchanger exchanges heat for a specific space or a specific substance, if the surface temperature of the tube row of the heat exchanger is lower than the solidification temperature of the substance in the specific space, for example, lower than 0°C, the surface of the tube row of the heat exchanger will be A solid substance generally called frost is produced. The thermal conductivity of this solid substance is much ...
Claims
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IPC IPC(8): F25D21/06F28D1/00F28G7/00
Inventor 何守政
Owner JUI HUNG REFRIGERATION TECH