WO2008138175A1 - Procédé d'utilisation d'eau de mer concentrée, très dure et très salée, en tant qu'eau de refroidissement industrielle en circulation - Google Patents

Procédé d'utilisation d'eau de mer concentrée, très dure et très salée, en tant qu'eau de refroidissement industrielle en circulation Download PDF

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Publication number
WO2008138175A1
WO2008138175A1 PCT/CN2007/001699 CN2007001699W WO2008138175A1 WO 2008138175 A1 WO2008138175 A1 WO 2008138175A1 CN 2007001699 W CN2007001699 W CN 2007001699W WO 2008138175 A1 WO2008138175 A1 WO 2008138175A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
hardness
cooling
cooling tower
seawater
Prior art date
Application number
PCT/CN2007/001699
Other languages
English (en)
Chinese (zh)
Inventor
Dezhi Shao
Yanxin Wang
Jianguo Bao
Wanli Hu
Xuelv Zheng
Yingying Zhang
Shucheng Mi
Original Assignee
China University Of Geosciences (Wuhan City)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University Of Geosciences (Wuhan City) filed Critical China University Of Geosciences (Wuhan City)
Publication of WO2008138175A1 publication Critical patent/WO2008138175A1/fr

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Classifications

    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • 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
    • C02F2103/08—Seawater, e.g. for desalination
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

Definitions

  • the invention provides a method for utilizing high hardness and high salinity concentrated seawater as industrial circulating cooling water, which is an ozone corrosion instead of adding a corrosion inhibitor, a scale inhibitor and a bactericidal algicide to solve the corrosion protection and knot of the system. Water-saving and environmental protection technology for scale, sterilization and algae killing. Background technique
  • the conductivity of seawater is only two orders of magnitude higher than that of ordinary fresh water. This determines that the resistive retardation of seawater is much smaller than that of freshwater, and seawater is more corrosive than freshwater. And the proportion of chloride in the salt content of seawater is very large, and the chlorine content of seawater is as high as 19%, so most metals such as iron, steel, cast iron, etc. cannot be in seawater.
  • T/CN2007/001699 establishes a passive state. At the same time, there are many kinds of microorganisms and large organisms in seawater, and the content is high, which is prone to biofouling, which leads to the corrosion of microbes or the corrosion of scales.
  • the concentration of scale ions such as Ca 2+ and Mg 2+ in seawater is much higher than that of ordinary fresh water, and the concentration tends to increase with the concentration factor.
  • the ordinary scale inhibitor and dispersant cannot effectively control the deposition of chemical scale.
  • the use of concentrated seawater as circulating cooling water has more serious problems of corrosion, scaling and fouling. Seawater circulating cooling water treatment is more difficult than freshwater circulation; concentrated seawater for circulating cooling water treatment is more difficult than seawater circulation cooling.
  • the object of the present invention is to provide a method for using industrial water circulating cooling water with high hardness and high salinity to achieve high hardness and high salinity seawater, high hardness and high salinity.
  • the wastewater is treated with three additives such as corrosion inhibitor, scale inhibitor and bactericidal algicide to save water and protect the environment.
  • the technical solution of the present invention is to provide a method for utilizing high hardness and high salinity concentrated seawater for industrial circulating cooling water, the method comprising the following steps: equipment for corrosion and scaling in a cooling system Washed with a cleaning agent and passivated with a passivating agent;
  • the storage tank under the cooling tower is equipped with a layer of activated carbon loaded with nanometer Ti0 2 with a thickness of 600mm. It is equipped with an ozone aeration system or a mixed jet system to catalyze the oxidation of ozone to make C0D 60mg/L in water. ; 0 3 0. 05-0. 20 mg/L; D0 ⁇ 2. 0 mg/L; d.
  • the water in the step c is filtered into the filter, and the concentration of the ozone in the filtered water is maintained at 0. 05-0. 2mg / L, when less than 0. 05mg / L additional ozone; e. heat Exchange
  • the treated water enters the heat exchange system, and the water from the heat exchange system enters the cooling tower for cooling and returns to the reservoir below the cooling tower.
  • the above water needs to supplement the water evaporated in the cooling process, and the added amount is balanced with the evaporation amount.
  • the effect of the invention is that the treatment method is used without rust inhibitor, corrosion inhibitor and bactericidal algaecide, and the total hardness of the treated water is as high as 4000-40000 mg/L, and the chloride is as high as
  • FIG. 1 is a process flow diagram of the present invention.
  • the present invention utilizes high hardness and high salinity concentrated seawater working with the present invention in conjunction with the accompanying drawings and embodiments.
  • the method of circulating cooling water is explained.
  • the reaction mechanism of the method for using the high hardness and high salinity concentrated seawater as the industrial circulating cooling water according to the invention is generally considered according to the role of ozone in the industrial circulating water of fresh water:
  • Ozone is a kind of oxidizing agent with strong oxidizing ability. It can directly oxidize unsaturated fatty acids, enzymes and proteins that make up cells, and oxidize macromolecular organic substances into small inorganic molecules, thus playing a good role in bactericidal and algae-killing;
  • Ozone can form a layer of Y-Fe 2 0 3 oxide film on the metal surface, which increases the corrosion resistance of the metal and reduces the corrosion rate.
  • the application of nano-scale Ti0 2 activated carbon is to reduce the energy consumption of ozone, in order to better play the role of sterilization and algae reduction and reduce COD.
  • the method for treating industrial circulating cooling water using high hardness and high salinity concentrated seawater comprises the following steps:
  • the equipment and pipelines that have been corroded and scaled in the cooling system are cleaned with a cleaning agent, and passivated with tap water containing a passivating agent for 24 hours to passivate.
  • the passivating agent used is a commercially available prepreg agent such as a tungsten type, a phosphorus type or a molybdenum type.
  • Collecting water and sinking T/CN2007/001699 will be concentrated seawater after seawater desalination or other concentrated high salinity high hardness brackish water, industrial wastewater (Pomeranian has reached about 10, hardness is 20000-70000mg / L, its hardness to include Calcium carbonate meter 100-250mg/L)
  • the suspended matter is removed and collected in a reservoir under the cooling tower.
  • microfiltration equipment such as ceramic stainless steel, fiber bundle or membrane filtration is used.
  • the high-hardness and high-salinity seawater described in this step includes high-hardness and high-salt concentrated seawater and high-hardness and high-salt industrial wastewater after desalination.
  • the storage tank under the cooling tower is filled with a nanometer-sized Ti0 2 activated carbon with a thickness of about 600 mm, and is equipped with an ozone aeration system for catalytic ozonation to make C0D 60rag/L in water; 0 3 0. 05-0. 20 rag/L; D0 ⁇ 2. 0 mg/l, the nano-sized Ti0 2 activated carbon in this step accelerates ozone and photocatalytic oxidation, sterilizes algae, decomposes aquatic organisms and other organic substances, which is beneficial to increase ozone oxidation.
  • Ability energy saving.
  • step c The water treated in step c is filtered into the filter, and the fiber bundle filter is used to backflush every 8 hours, and the recoil is simultaneously compressed air, and the recoil time is about ten minutes.
  • the concentration of ozone in the filtered water is maintained at 0. 05-0. 2rag / L, when less than 0. 05mg / L, add ozone to 0. 05-0, 2mg / L.
  • the treated water enters the heat exchange system, the water from the heat exchange system is then cooled into the cooling tower and returned to the reservoir under the cooling tower.
  • the cooling tower there will be A part of the water is evaporated, and the treated domestic water (middle water) can be replenished into the volatilized portion, and the added amount is balanced with the evaporation amount.
  • the salt content of industrial wastewater in a plant is as high as 10-20Be ', and the content of main components is as follows: Collected in the reservoir under the cooling tower;
  • a storage tank containing nano-scale Ti0 2 (thickness about 600mm) is installed in the reservoir under the cooling tower, and an ozone aeration system is installed; catalytic ozone oxidation reaction is carried out to make C0D 60mg/L in water; 0 3 0. 05-0. 20mg/L ; D0 2. 0mg/L.
  • step 4 The water treated in step 3 is filtered into a fiber bundle filter
  • the water from the heat exchange system is cooled by the cooling tower and returned to the reservoir below the cooling tower.
  • the treated water will volatilize part of the cooling tower during the cooling process, adding “middle water after domestic sewage treatment”, the amount of addition is controlled by the water level of the reservoir; Water" (usually fresh water) sprayed from the top of the cooling tower;
  • the fiber bundle filter used in the filtration is backflushed once every 8 hours, and the recoil is simultaneously compressed air, and the recoil time is about ten minutes;
  • the recoil water enters the sludge concentration tank of the domestic sewage treatment facility and is treated regularly;
  • passivation cycle depending on the concentration of ferrous ions in the water (generally stable at 0. 03mg / L) is higher than 0. 04mg / L when the operation is stopped, the domestic water used (middle water) is added to the volatilized part, rinse
  • the hot swap system can be restarted.

Abstract

La présente invention concerne un procédé d'utilisation d'eau de mer concentrée, très dure et très salée, en tant qu'eau de refroidissement industrielle en circulation, qui comprend les étapes suivantes : (a) un prétraitement par passivation du système ; (b) la collecte de l'eau pour éliminer la matière en suspension ; (c) l'ozonisation catalytique de l'eau de l'étape (b) avec du TiO2/AC de taille nanométrique ; (d) l'introduction de l'eau de l'étape (c) dans un filtre ; (e) l'introduction de l'eau des étapes précédentes dans un système d'échange thermique. L'eau du système d'échange thermique est introduite dans une colonne de refroidissement puis revient dans un réservoir sous la colonne de refroidissement pour constituer un supplément à l'eau réduite en raison de l'évaporation.
PCT/CN2007/001699 2007-05-09 2007-05-25 Procédé d'utilisation d'eau de mer concentrée, très dure et très salée, en tant qu'eau de refroidissement industrielle en circulation WO2008138175A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710057303.7 2007-05-09
CNB2007100573037A CN100560509C (zh) 2007-05-09 2007-05-09 利用高硬度高盐度浓缩海水作工业循环冷却水的方法

Publications (1)

Publication Number Publication Date
WO2008138175A1 true WO2008138175A1 (fr) 2008-11-20

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PCT/CN2007/001699 WO2008138175A1 (fr) 2007-05-09 2007-05-25 Procédé d'utilisation d'eau de mer concentrée, très dure et très salée, en tant qu'eau de refroidissement industrielle en circulation

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CN (1) CN100560509C (fr)
WO (1) WO2008138175A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102951689A (zh) * 2011-08-22 2013-03-06 苏州常乐泡塑有限公司 浓水循环利用装置
CN103421361B (zh) * 2012-05-24 2015-04-08 北京赛科康仑环保科技有限公司 一种用于精馏塔内件阻垢的改性碳纳米涂层
CN103304056B (zh) * 2013-06-17 2015-10-07 南京德磊科技有限公司 一种催化氧化污水处理设备
CN104163528B (zh) * 2014-08-07 2016-08-17 王占军 循环高效节水系统
CN106587470A (zh) * 2016-11-23 2017-04-26 山东东岳氟硅材料有限公司 一种高盐高cod废碱液无害化处理的方法及工艺系统
CN107299358A (zh) * 2017-06-28 2017-10-27 富威科技（吴江）有限公司 一种短流程硬态铜箔的清洗工艺
CN109028645A (zh) * 2018-08-16 2018-12-18 佛山市和利环保科技有限公司 工业循环冷却水装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003329389A (ja) * 2002-05-14 2003-11-19 Mitsubishi Gas Chem Co Inc 海生生物の付着防止方法
CN1636891A (zh) * 2004-10-26 2005-07-13 南京工业大学 海水作为循环冷却水的处理方法
CN1944292A (zh) * 2006-10-24 2007-04-11 天津市塘沽区鑫宇环保科技有限公司 利用苦咸水作工业循环冷却水的处理方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003329389A (ja) * 2002-05-14 2003-11-19 Mitsubishi Gas Chem Co Inc 海生生物の付着防止方法
CN1636891A (zh) * 2004-10-26 2005-07-13 南京工业大学 海水作为循环冷却水的处理方法
CN1944292A (zh) * 2006-10-24 2007-04-11 天津市塘沽区鑫宇环保科技有限公司 利用苦咸水作工业循环冷却水的处理方法

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CN100560509C (zh) 2009-11-18
CN101049985A (zh) 2007-10-10

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