CN111649615A - Method for determining leakage rate of circulating system through concentration ratio when impurities are removed - Google Patents

Method for determining leakage rate of circulating system through concentration ratio when impurities are removed Download PDF

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Publication number
CN111649615A
CN111649615A CN202010474607.9A CN202010474607A CN111649615A CN 111649615 A CN111649615 A CN 111649615A CN 202010474607 A CN202010474607 A CN 202010474607A CN 111649615 A CN111649615 A CN 111649615A
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China
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ions
water
concentration
cooling system
circulating
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CN202010474607.9A
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CN111649615B (en
Inventor
胡绍伟
吕子强
马光宇
陈鹏
王飞
刘芳
王永
徐伟
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C02F2103/023—Water in cooling circuits

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Abstract

The invention discloses a method for determining the leakage rate of a circulating system through concentration ratio when impurities are removed, which can objectively and truly reflect the operating 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.

Description

Method for determining leakage rate of circulating system through concentration ratio when impurities are removed
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 system through concentration ratio when impurities are removed.
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 is paying more attention to the management of water resources at present, the correlation between the concentration ratio and the leakage rate of the circulating system is not described quantitatively 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 system through the concentration ratio when impurities are removed, so that the operating parameters of the circulating water system can be objectively and truly reflected, the problems in operation can be timely adjusted and checked, the leakage rate of the system can be accurately controlled, the new water consumption of the system can be reduced, and the effects of energy conservation and emission reduction can be realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for determining the leakage rate of the circulating system through the concentration ratio when impurities are removed is characterized in that: the circulating 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 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 concentration of each ion in the circulating water cooling system is C11，C12，C13····C1(n-1)，C1nAnd C is11＜C12＜C13····C1(n-1)＜C1nThe concentration of each ion in the corresponding water supplement is C01，C02，C03····C0(n-1)，C0nConcentration multiplying factor N ═ C of circulating water cooling system11+C12+C13+····+C1(n-1)+C1n)/(C01+C02+C03+····+C0(n-1)+C0n) N is 3-5;
the removal rate of the impurities is H, the proportion of salt substances removed through the net ring of the circulating water cooling system is shown, and the removal means comprises but is not limited to side filtration and total filtration;
ions in the circulating water cooling system include but are not limited to sodium ions, potassium ions, chloride ions, fluoride ions, calcium ions, magnesium ions, sulfate ions, nitrate ions, silicon ions, iron ions and aluminum ions, the concentration of the ions does not change within 24 hours under the condition of normal temperature and normal pressure illumination, and the ions are not contained in the agent brought into the surrounding environment and added into the system;
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 balance of water quality salt substances: f0＝F1·N+H·N(1-F0)；
Namely: (F)1+F2)·(1+H·N)＝F1·N+H·N
Thus: f12＝[H*N-F2(1+H*N)]·(1+HN-N)-1-F11。
Said F2The value is 0.01-0.02.
The invention has the beneficial effects that: the concentration ratio numerical 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:
example 1:
open circulating water cooling system, F, operating stably for long periods2Constant of (2) is 0.01, F of the system110.0003, the concentration of potassium ions in the circulating system is 12.2mg/L, the concentration of magnesium ions is 24.8mg/L, and the concentration of chloride ions is 43.1 mg/L; the concentration of potassium ions in the water is 3.1mg/L, the concentration of magnesium ions is 8.1mg/L, the concentration of chloride ions is 15.2mg/L, and the impurity removal rate H is 0.003.
So that N ═ 12.2+24.8+43.1)/(3.1+8.1+15.2) ═ 3.03,
the system leakage rate:
F12＝[0.003×3.03-0.01(1+0.003×3.03)]·(1+0.003×3.03-3.03)-1-0.0003
＝0.000195
the real leakage rate of the system is obtained through model calculation, which indicates that a certain leakage condition exists in the operation system, and the comprehensive investigation should be carried out to find out the reason of the leakage rate and perfect or eliminate the reason, so that the new water consumption of the system is reduced, and the water saving and emission reduction of the system are realized.
Example 2:
open circulating water cooling system, F, operating stably for long periods2Constant of (2) is 0.02, F of the system110.0002, the concentration of silicon ions in the circulating system is 1.6mg/L, the concentration of potassium ions is 19.9mg/L, and the concentration of magnesium ions is 20.5 mg/L; in the water supplement, the concentration of silicon ions is 0.42mg/L, the concentration of potassium ions is 5.1mg/L, the concentration of magnesium ions is 5.5mg/L, and the impurity removal rate H is 0.005.
So that N ═ 1.6+19.9+20.5)/(0.42+5.1+5.5) ═ 3.81,
the system leakage rate:
F12＝[0.005×3.81-0.02(1+0.005×3.81)]·(1+0.005×3.81-3.81)-1-0.0002
＝0.000276
the real leakage rate of the system is obtained through model calculation, which indicates that a certain leakage condition exists in the operation system, and the comprehensive investigation should be carried out to find out the reason of the leakage rate and perfect or eliminate the reason, so that the new water consumption of the system is reduced, and the water saving and emission reduction of the system are realized.
Example 3:
open circulating water cooling system, F, operating stably for long periods2Constant of (2) is 0.03, F of the system110.00025, the concentration of silicon ions in the circulating system is 2.5mg/L, the concentration of potassium ions is 16.1mg/L, and the concentration of calcium ions is 48.2 mg/L; the concentration of silicon ions in the water is 1.45mg/L, the concentration of potassium ions is 4.1mg/L, the concentration of calcium ions is 12.5mg/L, and the impurity removal rate H is 0.007.
So that N ═ 2.5+16.1+48.2)/(1.45+4.1+12.5) ═ 3.70,
the system leakage rate:
F12＝[0.007×3.70-0.03(1+0.007×3.70)]·(1+0.007×3.70-3.70)-1-0.00025
＝0.001571
the real leakage rate of the system is obtained through model calculation, which indicates that a certain leakage condition exists in the operation system, and the comprehensive investigation should be carried out to find out the reason of the leakage rate and perfect or eliminate the reason, so that the new water consumption of the system is reduced, and the water saving and emission reduction of the system are realized.

Claims (2)

1. A method for determining the leakage rate of a circulating system through concentration ratio when impurities are removed is characterized in that: the circulating 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 discharge water rate of the circulating water cooling system comprises F1And F2In which F is1Is carrying salt substancesDischarge water ratio of discharge, F2The water discharge rate is the water discharge rate discharged only in the form of water molecules;
the concentration of each ion in the circulating water cooling system is C11，C12，C13····C1(n-1)，C1nAnd C is11＜C12＜C13····C1(n-1)＜C1nThe concentration of each ion in the corresponding water supplement is C01，C02，C03····C0(n-1)，C0nConcentration multiplying factor N ═ C of circulating water cooling system11+C12+C13+····+C1(n-1)+C1n)/(C01+C02+C03+····+C0(n-1)+C0n) N is 3-5;
the removal rate of the impurities is H, the proportion of salt substances removed through the net ring of the circulating water cooling system is shown, and the removal means comprises but is not limited to side filtration and total filtration;
ions in the circulating water cooling system include but are not limited to sodium ions, potassium ions, chloride ions, fluoride ions, calcium ions, magnesium ions, sulfate ions, nitrate ions, silicon ions, iron ions and aluminum ions, the concentration of the ions does not change within 24 hours under the condition of normal temperature and normal pressure illumination, and the ions are not contained in the agent brought into the surrounding environment and added into the system;
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 to the environment in the form of water molecules, including but not limited to evaporation on the water surface, evaporation of water on the object surface, and natural waterA constant is set under the element;
according to water balance: f0＝F1+F2；
According to the balance of water quality salt substances: f0＝F1·N+H·N(1-F0)；
Namely: (F)1+F2)·(1+H·N)＝F1·N+H·N
Thus: f12＝[H*N-F2(1+H*N)]·(1+HN-N)-1-F11。
2. The method of claim 1 for determining a recycle system leak rate by concentration factor in the presence of contaminant removal, wherein: said F2The value is 0.01-0.02.
CN202010474607.9A 2020-05-29 2020-05-29 Method for determining leakage rate of circulating system through concentration ratio when impurities are removed Active CN111649615B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1760136A (en) * 2004-10-15 2006-04-19 中国科学院生态环境研究中心 A kind of industrial water system clean preparation method that comprises recirculated cooling water and boiler water supply
CN101315253A (en) * 2008-07-21 2008-12-03 张贵祥 Cooling water shortcut circulation energy conservation and emission reduction technology
CN102008887A (en) * 2010-12-06 2011-04-13 北京交通大学 Method for testing concentration ratio of slurry in wet flue gas desulfurization absorption tower in thermal power plant
CN203095755U (en) * 2013-01-31 2013-07-31 广州市金润环保科技有限公司 Zero-discharge device for circulating water system
CN106145498A (en) * 2016-08-23 2016-11-23 华电郑州机械设计研究院有限公司 A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method
US10031533B2 (en) * 2014-12-11 2018-07-24 Lg Electronics Inc. Drinking water supply device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1760136A (en) * 2004-10-15 2006-04-19 中国科学院生态环境研究中心 A kind of industrial water system clean preparation method that comprises recirculated cooling water and boiler water supply
CN101315253A (en) * 2008-07-21 2008-12-03 张贵祥 Cooling water shortcut circulation energy conservation and emission reduction technology
CN102008887A (en) * 2010-12-06 2011-04-13 北京交通大学 Method for testing concentration ratio of slurry in wet flue gas desulfurization absorption tower in thermal power plant
CN203095755U (en) * 2013-01-31 2013-07-31 广州市金润环保科技有限公司 Zero-discharge device for circulating water system
US10031533B2 (en) * 2014-12-11 2018-07-24 Lg Electronics Inc. Drinking water supply device
CN106145498A (en) * 2016-08-23 2016-11-23 华电郑州机械设计研究院有限公司 A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method

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* Cited by examiner, † Cited by third party
Title
陆柱 等: "《水处理技术》", 31 August 2006 *

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