阅读说明：本技术 一种通过温度浓缩倍率确定循环水冷却系统漏损率的方法 (Method for determining leakage rate of circulating water cooling system through temperature concentration rate ) 是由 胡绍伟 吕子强 马光宇 伊源辉 陈鹏 张彦 王飞 刘芳 王永 徐伟 于 2020-05-29 设计创作，主要内容包括：本发明公开一种通过温度浓缩倍率确定循环水冷却系统漏损率的方法,能够客观真实的反映出循环水系统的运行参数,及时调整和排查运行中存在问题,从而精确的控制系统的漏损率,减少系统的新水消耗量,实现节能减排的效果。(The invention discloses a method for determining the leakage rate of a circulating water cooling system through temperature concentration ratio, which can objectively and truly reflect the operation parameters of the circulating water system and timely adjust and investigate problems in operation, thereby accurately controlling the leakage rate of the system, reducing the consumption of new water of the system and realizing the effects of energy conservation and emission reduction.)

1. A method for determining the leakage rate of a circulating water cooling system through temperature concentration rate is characterized in that: the circulating water cooling system is an open circulating water cooling system, comprises all pipeline valves, a cooling tower system and a production process heat exchange system and is in a stable operation state;

the only water replenishing rate entering the circulating water cooling system is F₀The temperature of the water supplement is T₀The discharge water rate of the circulating water cooling system comprises F₁And F₂In which F is₁Is the rate of discharge of the salt-carrying substances, F₂The water discharge rate is the water discharge rate discharged only in the form of water molecules;

the temperature of the inlet water before entering the cooling tower system is T₁The outlet water temperature of the cooling tower system is T₂(ii) a Cooling capacity coefficient K ═ T of cooling tower system₁/T₂K is a constant according to the characteristics of the cooling tower, when K is 1, the cooling tower can completely eliminate the equipment heat load, and when K is less than 1, the phenomenon that the cooling tower has insufficient cooling capacity is shown;

temperature concentration multiplying power N ═ T of circulating water cooling system₂/T₀The ratio of the temperature of circulating water to the temperature of water supplement;

said F₀Only supplementing water for manual work, neglecting the influence of natural conditions, including but not limited to rain, snow and hail;

said F₁Contains salt substances with the same concentration as that of a circulating water cooling system, namely F₁₁And F₁₂Two-part, i.e. F₁＝F₁₁+F₁₂In which F is₁₁Limited to circulating water cooling systemsDischarge water rate of waste₁₂The leakage rate of the circulating water cooling system is artificially uncontrollable, and the leakage rate comprises but is not limited to the phenomena of floating, splashing, running, overflowing, dripping and leaking;

said F₂The water is discharged into the environment in the form of water molecules, including but not limited to evaporation on the water surface and evaporation of water on the object surface, and is a constant under natural conditions;

according to water balance: f₀＝F₁+F₂；

According to the energy balance: f₀T₀+(T₂-T₁)＝(F₁+F₂)T₂；

Thus, F₁₂＝N·(1-K)/(N-1)-F₂-F₁₁。

2. The method for determining the leakage rate of the circulating water cooling system through the temperature concentration rate as claimed in claim 1, wherein: the value of K is 0.9-1.

3. The method for determining the leakage rate of the circulating water cooling system through the temperature concentration rate as claimed in claim 1, wherein: said F₂The value is 0.01-0.02.

Technical Field

The invention belongs to the field of environmental engineering, and particularly relates to a method for determining the leakage rate of a circulating water cooling system through temperature concentration rate.

Background

Taking steel enterprises as an example, the circulating water cooling system has wide application and is essential to the production of the enterprises. Most of the operation modes are that water after exchanging heat with equipment is conveyed into the tower by a lifting pump, and then the water and air exchange heat or heat and mass exchange so as to achieve the purpose of reducing the water temperature.

Water management level of a water system of a developed foreign country is high, water is generally recycled and treated as much as possible and non-traditional water resources are considered as a supplementary water source, so that the consumption of new water and the amount of discharged wastewater are reduced. Although the national environmental protection policy is becoming stricter and the enterprise pays more attention to the management of water resources at present, the correlation between the leakage rate and the temperature concentration rate of the circulating system is not quantitatively described by a mathematical model theory.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the method for determining the leakage rate of the circulating water cooling system through the temperature concentration ratio, which can objectively and truly reflect the operation parameters of the circulating water system and timely adjust and investigate the problems in operation, thereby accurately controlling the leakage rate of the system, reducing the consumption of new water of the system and realizing the effects of energy conservation and emission reduction.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for determining the leakage rate of a circulating water cooling system through temperature concentration rate is characterized in that: the circulating water cooling system is an open circulating water cooling system, comprises all pipeline valves, a cooling tower system and a production process heat exchange system and is in a stable operation state;

the only water replenishing rate entering the circulating water cooling system is F₀The temperature of the water supplement is T₀The discharge water rate of the circulating water cooling system comprises F₁And F₂In which F is₁Is the rate of discharge of the salt-carrying substances, F₂The water discharge rate is the water discharge rate discharged only in the form of water molecules;

the temperature of the inlet water before entering the cooling tower system is T₁The outlet water temperature of the cooling tower system is T₂(ii) a Cooling capacity coefficient K ═ T of cooling tower system₁/T₂K is a constant according to the characteristics of the cooling tower, when K is 1, the cooling tower can completely eliminate the equipment heat load, and when K is less than 1, the phenomenon that the cooling tower has insufficient cooling capacity is shown;

temperature concentration multiplying power N ═ T of circulating water cooling system₂/T₀The ratio of the temperature of circulating water to the temperature of water supplement;

said F₀Only supplementing water for manual work, neglecting the influence of natural conditions, including but not limited to rain, snow and hail;

said F₁Contains salt substances with the same concentration as that of a circulating water cooling system, namely F₁₁And F₁₂Two-part, i.e. F₁＝F₁₁+F₁₂In which F is₁₁Water discharge rate and F limited to artificial pollution discharge of circulating water cooling system₁₂The leakage rate of the circulating water cooling system is artificially uncontrollable, and the leakage rate comprises but is not limited to the phenomena of floating, splashing, running, overflowing, dripping and leaking;

said F₂The water is discharged into the environment in the form of water molecules, including but not limited to evaporation on the water surface and evaporation of water on the object surface, and is a constant under natural conditions;

according to water balance: f₀＝F₁+F₂；

According to the energy balance: f₀T₀+(T₂-T₁)＝(F₁+F₂)T₂；

Thus, F₁₂＝N·(1-K)/(N-1)-F₂-F₁₁。

The value of K is 0.9-1.

Said F₂The value is 0.01-0.02.

The invention has the beneficial effects that: the temperature concentration multiplying power value of the circulating system can be objectively and truly obtained, so that the leakage rate of the system is accurately controlled, the new water consumption of the system is reduced, and the effects of energy conservation and emission reduction are realized.

Detailed Description

The following description is given with reference to specific examples: