Automatic temperature control apparatus of large cooling column group

A technology of temperature control device and cooling tower, applied in the direction of temperature control, temperature control without auxiliary power supply, non-electric variable control, etc., can solve the problems of large pipeline and power grid shock, equipment damage, energy waste, etc., and reduce labor force. , easy to control, reduce the effect of impact

Active Publication Date: 2009-04-08
HUDONG HEAVY MACHINERY
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Problems solved by technology

[0004] The disadvantages of this control method in the prior art: the start and stop of the motor have a great impact on the pipeline and the power

Method used

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  • Automatic temperature control apparatus of large cooling column group
  • Automatic temperature control apparatus of large cooling column group

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Embodiment Construction

[0025] The automatic temperature control device of a large-scale cooling tower group of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, in order to further clarify the technical solutions and technical advantages of the present invention. Limit the protection scope of the present invention.

[0026] First please refer to Fig. 1 to understand the system configuration of the present invention. Fig. 1 is a system schematic diagram of the frequency conversion control device of the automatic temperature control device of a large cooling tower group of the present invention. As can be seen from the figure, the automatic temperature control device of the large-scale cooling tower group of the present invention is to control the cooling fan on the cooling tower group to achieve automatic control of the temperature of the cooled cooling water at the set value. There are multiple fans in the cooling ...

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Abstract

The invention relates to an automatic temperature control device of a large cooling tower group which comprises a plurality of blowers. The high temperature cooling water of a high temperature working machine is cooled by running through the blower and imported into a cold water pool to save, and the water is pumped to the high temperature working machine from the cold water pool to achieve the recycling of the cooling water, one of the plurality of the blowers is selected as a main blower, the others are the assistant blowers, the main contactors of the blower motor are connected in parallel and connected with a soft starter which is connected with and controlled by a programmable controller, a temperature sensor is arranged into the cold water pool, the signal of the temperature sensor is output to a PID digital regulator which inputs the signal to the programmable controller and a converter which is connected with the main blower, the assistant blowers are connected with the soft starter and a working frequency power supply, and the programmable controller accomplishes the conversion and the control. The device has the advantages of convenient control, gentle start and stop, economical and practical properties, and environmental protection and the device can also save power by more than 30 percent.

Description

technical field [0001] The invention relates to automatic control, in particular to an automatic temperature control device for a cooling tower group used in the test run of a high-power marine diesel engine. Background technique [0002] During the test run of the high-power marine diesel engine, the cooling water of the cooler, the cooling water of the air cooler and the cooling water of the hydraulic dynamometer continuously enter the hot water pool. The recirculation is used for the test run of the diesel engine. [0003] As the output power of marine high-power diesel engines continues to increase, the cooling water required for diesel engines to run on test benches also increases accordingly. The capacity of the cooling tower fan used in the past can no longer meet the operation requirements of the cooling tower. Therefore, a combination of several cooling tower fans with large capacity was selected to meet the operation requirements of the cooling tower. The cooling...

Claims

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Application Information

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IPC IPC(8): F28F27/00G05D23/20G05D23/01
Inventor 黄丹清陈培贞
Owner HUDONG HEAVY MACHINERY
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