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Method for optimizing circulating cooling water convey system

A technology for circulating cooling water and conveying systems, which is applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., and can solve problems such as low system efficiency

Inactive Publication Date: 2011-05-11
杨宝良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for optimizing the circulating cooling water delivery system to overcome the existing problem of low system efficiency and improve the operating efficiency of the circulating cooling water delivery system

Method used

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  • Method for optimizing circulating cooling water convey system
  • Method for optimizing circulating cooling water convey system
  • Method for optimizing circulating cooling water convey system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Optimization method of 1080 blast furnace circulating medium pressure circulating cooling water system in a steel plant.

[0053] Data collection of each link of the circulating cooling water system: a total of 3 water pumps (2 for use and 1 for standby all year round), parallel operation, water pump model 500S-100TD, rated flow rate 2422m 3 / h, rated head 81.8m, rotating speed 980r / min, matching motor model YJK5004-6, rated power 800KW, voltage 6KV, rated current 97.2A, cosΦ=0.83. Go to the power distribution room to find out that the actual operating current is 75A and 67.5A, and the actual operating voltage is 6300V. The calculated actual operating power is: 679KW and 611KW respectively. The pump inlet and upper tower valves are fully open, the internal thread gate valve of the pump outlet is opened 1 / 8, the outlet check valve cannot be fully opened, the pipe diameter is DN600, the liquid level of the pool is 2.8m, and the pump room is located on the large ground. ...

Embodiment 2

[0061] Optimization of circulating cooling water system of acetic anhydride plant in a chemical fertilizer plant:

[0062] Data collection of each link of the circulating cooling water system: 4 water pumps (2 for use and 2 for standby), with a flow rate of 2200m 3 / h, rated head 60.5m, speed 1450r / min, rated power of supporting motor 500KW, voltage 6KV, rated current 60A, actual operating current 41A. The liquid level of the pool is 0.6m, the inlet and outlet valves of the pump are fully opened, the butterfly valve of the water supply main pipe is opened at 60°, the butterfly valve of the return water main pipe is opened at 20°, the outlet pressure of the pump is 0.32Mpa, and the impeller of the water pump is seriously corroded.

[0063] Correspondingly eliminate the valve loss, local circulation, high and low pressure mixing, pipeline blockage and unnecessary losses in the system, and replace the pump model at the same time: draw the pipeline characteristic map, find out the...

Embodiment 3

[0065] System optimization of circulating cooling water system in a pharmaceutical factory:

[0066] Data collection of each link of the circulating cooling water system, recording system field data: a total of 4 units, parallel operation, 3 units in summer and 2 units in winter, water pump model 20SH-13, rated flow 3168m 3 / h, rated head 47.4m, rotating speed 970r / min, matching motor model Y500-6, rated power 560KW, voltage 10KV, rated current 39.2A. Go to the power distribution room to find out that the actual operating current is 27.5A. The calculated actual operating power is: 405KW. The pump inlet, outlet and upper tower valves are fully open, the liquid level of the pool is 1.8m, and the pump room is located on the ground. The outlet pressure of the water pump is 0.27MPa, and the system supplies heat exchange equipment and process water in each workshop. The highest water point of the terminal equipment is 23m, and the total flow is 7711m 3 / h.

[0067] Corresponding...

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Abstract

The invention belongs to the field of circulating cooling water conveying systems and particularly relates to a method for optimizing a circulating cooling water convey system. The method comprises acquisition of date in all procedures of the circulating cooling water system, date analysis, and system optimization. The model number of a water pump actually needed in the system is determined through data acquisition and analysis, and valve loss, local circumfluence, high-low pressure blending, pipeline blockage and unnecessary loss in the system are correspondingly eliminated. By adopting the method, unfavorable working conditions caused by overlarge resistance of the circulating cooling water system, such as overlarge electric motor power, over temperature, cavitation erosion on a water pump, low operation efficiency and the like are improved, and most importantly, the pipeline characteristic matching problem in the circulating cooling water system is solved. By adopting the tailor-made water pump to meet actual needs, the efficiency of the machine set is more than 15% higher than that of the original pump, the cavitation erosion phenomenon is remarkably relieved, the electric motor is protected, the service life is longer, the energy saving effect is greatly improved to reach above 25%, and the actual operation efficiency of the system is greatly improved.

Description

technical field [0001] The invention belongs to the field of circulating cooling water delivery systems, in particular to an optimization method for circulating cooling water delivery systems. Background technique [0002] Circulating cooling water systems are widely used in process cooling and cooling of equipment and devices in industries such as iron and steel, chemical industry, chemical fiber, chemical fertilizer, pharmaceuticals, and thermoelectricity. The operating efficiency varies greatly. According to statistics, the system efficiency in developed countries is about 75%, while that in my country is only about 45%. The root cause of the low system efficiency lies in the backwardness of system design concept, technical means, project decision-making and system operation management. [0003] Due to uncertain factors and unstable performance of related equipment during design, pumps with a capacity larger than the system requirements are often used. In the actual oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/14
Inventor 杨宝良吴迎新
Owner 杨宝良
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