Anti-freezing device for closed cooling tower

Abstract

The invention discloses an anti-freezing device for a closed cooling tower. The anti-freezing device comprises a water inlet pipe of the cooling tower and a water outlet pipe of the cooling tower, wherein the water inlet pipe of the cooling tower is connected to the water inlet end of the closed cooling tower, and the water outlet end of the closed cooling tower is connected with the water outlet pipe of the cooling tower. The anti-freezing device for the closed cooling tower is characterized by comprising an anti-freezing machine device. The anti-freezing machine device comprises a water inlet pipe of the anti-freezing machine and a water outlet pipe of the anti-freezing machine, wherein the water inlet pipe of the anti-freezing machine is connected with the outlet pipe of the cooling tower, the water outlet pipe of the anti-freezing machine is connected with the water inlet pipe of the cooling tower; the water inlet pipe of the cooling tower is provided with a first valve; the water outlet pipe of the cooling tower is provided with a second valve; the water inlet pipe of the anti-freezing machine is provided with a third valve; the water outlet pipe of the anti-freezing machine is provided with a fourth valve; and a pipeline at the back of the third valve is provided with a pump and a check valve successively in water flow direction. The anti-freezing device for the closed cooling tower is convenient to operate and reliable in work, can effectively prevent a coil pipe of the closed cooling tower from frost crack in winter, and ensures a normal operation of the closed cooling tower in winter.

Description

technical field [0001] The invention relates to the field of cooling tower antifreeze technology, in particular to a closed cooling tower antifreeze equipment. Background technique [0002] In the cold winter, when the closed cooling tower is not in operation, the cooling coil will often freeze due to the low temperature, resulting in internal freezing and cracking of the coil. As the core component of the closed cooling tower, the cooling coil will cause the closed cooling tower to fail to operate normally after being frozen and cracked. [0003] At present, the following two schemes are generally adopted for anti-freezing of closed cooling towers: one is to add antifreeze (ethylene glycol) inside the circulation pipeline; the other is to discharge the cooling water inside the circulation pipeline when the closed cooling tower is not in operation in winter . [0004] However, it has been proved that the above two solutions have different defects: the defect of the first s...

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Problems solved by technology

[0004] However, it has been proved that the above two solutions have different defects: the defect of the first solution is that adding ethylene glycol will reduce the heat capacity of the circulating water, resulting in a decrease in the heat exchange capacity between the circulating water and the inner wall of the tube, thus affecting the heat transfer effect, and the discharge will cause pollution to the environment

The disadvantage of the second scheme is that the operation is complicated. Due to the complex structure design of the closed cooling tower, it is difficult to discharge all the circulating water in the pipe. Since some circulating water will remain in the pipe, the cooling coil will freeze and crack in winter; moreover, if In winter, the closed cooling tower is not always shut down, that is, the closed cooling tower is intermittently used or stopped. In this way, it is very troublesome to replenish cooling water before each closed cooling tower is operated.

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