Auxiliary machine cooling water system achieving high-low position arrangement

Abstract

The invention provides an auxiliary machine cooling water system achieving high-low position arrangement. The auxiliary machine cooling water system comprises multiple auxiliary machine devices sequentially arranged on the ground upwards. The multiple auxiliary machine devices are divided into the high-position arrangement auxiliary machine devices and the low-position arrangement auxiliary machine devices by a division face. An auxiliary machine dry cooling system is adopted by each of the high-position arrangement auxiliary machine devices and the low-position arrangement auxiliary machine devices. The auxiliary machine dry cooling systems comprise high-position water tanks, auxiliary machine cooling water pumps and auxiliary machine dry cooling towers. The multiple corresponding auxiliary machine devices in the high-position arrangement auxiliary machine devices and the low-position arrangement auxiliary machine devices are connected in parallel. In the high-position arrangement auxiliary machine devices or the low-position arrangement auxiliary machine devices, outlets of the auxiliary machine devices are connected with inlets of the auxiliary machine cooling water pumps, outlets of the auxiliary machine cooling water pumps are connected with inlets of the auxiliary machine dry cooling towers, outlets of the high-position water tanks are connected with the outlets of the auxiliary machine cooling water pumps, and outlets of the auxiliary machine dry cooling towers are connected with inlets of the auxiliary machine devices. By means of the system, the manufacturing requirement and cost of the devices are greatly reduced, and meanwhile the safety of device operation is improved.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation air cooling systems, in particular to an auxiliary machine cooling water system arranged in high and low positions. Background technique [0002] When the main engine of a thermal power plant is cooled by a direct air cooling system, when the steam turbine in the main workshop is arranged at a high position, the exhaust steam of the steam turbine is directly connected to the direct air cooling system of the main engine, which saves the steam exhaust device of the steam turbine and shortens the exhaust pipeline, which has the advantages of reducing engineering investment and exhaust steam. The pressure drop of the pipeline improves the operating economy and safety of the direct air cooling unit. This arrangement leads to the layered arrangement of auxiliary equipment in the main workshop, with auxiliary equipment on floors 0m to 65m. At present, the conventional design adopts a se...

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Problems solved by technology

The outlet pipe of the water tank is connected to the water inlet of the cooling water pump of the auxiliary machine. When the system is in normal operation, the outlet pressure of the cooling water pump of the auxiliary machine will be superimposed on the static pressure of the high-level water tank. The design pressure is about 1.2MPa, which exceeds the design pressure of commonly used equipment. The equipment is a non-standard product, which is difficult to purchase. At the same time, if the manufacturer specializes in producing such high-pressure equipment, the investment will be large, and the risk of system operation will increase. Optimization reduces equipment design pressure

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