CN101955863B - Neutral calcium sulfate scale cleaning agent - Google Patents

Neutral calcium sulfate scale cleaning agent Download PDF


Publication number
CN101955863B CN2010102180000A CN201010218000A CN101955863B CN 101955863 B CN101955863 B CN 101955863B CN 2010102180000 A CN2010102180000 A CN 2010102180000A CN 201010218000 A CN201010218000 A CN 201010218000A CN 101955863 B CN101955863 B CN 101955863B
Prior art keywords
calcium sulfate
cleaning agent
sulfate scale
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Chinese (zh)
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CN101955863A (en
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Publication of CN101955863B publication Critical patent/CN101955863B/en



The invention relates to a chemical cleaning agent, in particular to a special chemical cleaning agent for cleaning calcium sulfate (CaSO4) scale. The invention provides a novel cleaning agent and a scheme for cleaning the calcium sulfate scale, in the actual application, the novel cleaning agent can effectively clean the calcium sulfate scale in both working and stopping sates of boilers or industrial circulated cooling water system. The novel cleaning agent is prepared from the following raw material reagents in parts by weight: 10% of HEDP (Hydroxyl Ethidene Diphosphoric Acid), 0.05% of JFC (fatty alcohol-polyoxyethylene ether), 5% of cosolvents and 0.06% of nonionic PAM (polyacrylamide), and the pH value is regulated to 7 by using caustic soda. The reagent is a special cleaning agent for the calcium sulfate scale, mainly comprising a high-polymer organic polymer containing multi-functional groups, such as carboxyl, hydroxyl, amide and the like, and is specially used for cleaning indissolvable calcium sulfate scale, and the PH value of the reagent is 7. The cleaning agent is a neutral solution and has the advantages of thoroughly scale cleanness, no corrosion on metal, enamel and glass, no toxicity to human bodies, safe emission of waste liquid, high efficiency and safety without generating the phenomenon of hydrogen brittleness.


Calcium sulfate dirt neutral cleaners
Technical field
The present invention relates to a kind of chemical, specifically, relate to a kind of special cleaning calcium sulfate (CaSO 4) dirty chemical.
Technical background
In the daily industrial production, BW and industrial circulating cooling water constantly circulate in use and concentrate, and the content of mineral substances in the water also can constantly increase, thereby cause equipment pipe fouling, corrosion.Equipment will reduce heat exchanger effectiveness greatly in case knot scales, and reduce cooling performance, and etching apparatus shortens service life of equipment, jeopardizes safety in production.Therefore, must regularly handle boiler and recirculated cooling water pipeline.The kind of common dirt has carbonate deposit, sulfate scale, silicate scale, mixing incrustation scale, red stone dirt, grease etc.
At present, the calcium sulfate dirt also has no idea to clean up hill and dale, and this is a great problem that the puzzlement incrustation scale is handled always.The present invention is directed to the calcium sulfate dirt, developed a kind of neutral cleaners, invalid to dirts such as iron rust, lime carbonate, foundry loams, and only to the specific neutral cleaners of calcium sulfate.
Summary of the invention
Technical purpose of the present invention is to overcome the cleaning difficult problem of calcium sulfate dirt; Provide and be used for novel detergent and the scheme that the calcium sulfate incrustation scale cleans; In practical application, no matter be boiler or industrial refrigeration cycle water system, cleaning calcium sulfate incrustation scale effectively can stop or not stop.
The technical scheme that the present invention cleans the calcium sulfate incrustation scale that produces in the industrial production is such: the novel detergent that it is formed by the raw material reagent preparation of following weight part: 10%HEDP, 0.05%JFC, 5% solubility promoter, 0.06% nonionic PAM, using NaOH to regulate pH value is 7.
These article are water white transparency or weak yellow liquid.
Be that starting material of the present invention are explained below:
HEDP (HEDP): can be miscible with water; Has good scale effect; Acid and alkali-resistance can form stable complex compound with multiple metals ions such as iron, copper, aluminium zinc, ability dissolution of metals oxide on surface; Being the Scale inhibitors and the inhibiter of boiler and switching heat-exchanger, is the dirt dispersion agent of circulating water system.
JFC (AEO): osmosis is arranged, and also is to have a fixed hydrophilic and oleophilic group, aligns at the surface energy of solution, and the material that surface tension is significantly descended.
Solubility promoter: can and insoluble reagent in solvent, form complex compound, associated complex or double salt etc. between shla molecule, to increase the solubleness of reagent in solvent.
Nonionic PAM (SEPIGEL 305): be linear polymer, have the effect of flocculation, dispersion, thickening, bonding, film forming, gel, stable colloid with the low ion degree of high-molecular weight.
Accommodation of the present invention: oil, chemical industry, chemical fertilizer, papermaking, brewage, circulation coolings such as oil refining, locomotive, parking freezing, that add hot-water system clean and cleanings of not stopping the perhaps part of one piece apparatus cleaning.Be primarily aimed at calcium sulfate dirt type, the calcium sulphate content of dirt is high more, cleans thorough more more soon.
Consumption of the present invention: 100% of the container water yield.
This reagent is calcium sulfate dirt scavenger specially, mainly by contain carboxyl, hydroxyl, acid amides, etc. multi-functional polymer organic polymer forms, be exclusively used in that to remove calcium sulfate dirt indissoluble dirty; Medicament pH value is 7, neutral solution, and snaking is thorough; Not corroding metal, enamel, glass, to human non-toxic, waste liquid can safety dumping; Highly effective and safe does not produce the hydrogen embrittlement phenomenon.During clean-out operation, heat exchange element need be do not disassembled, the spray equipment circulation hydro-peening of system can be utilized, also can soaking and washing, descaling rate is nearly 100%, has quick descaling, non-corrosive steel frame, does not hinder enamel elements, does not destroy the characteristics of scale anticorrosion material.Scavenging period is 3~12 hours, shortens the repair time of equipment greatly, avoids unpicking and washing the damage to device, significantly reduces the maintenance cost and the risk of equipment, and extension fixture work-ing life and effective rate of utilization have appreciable economic benefit and environmental benefit.
Method of use of the present invention:
Consumption adds medicament stoste according to dirt amount and thickness, hardness situation, perhaps by the on-the-spot scheme that adds of working out of technician.
Add by the recycle pump suction port, constitute circulation, perhaps spray, also can soak.
According to dirt amount operation 6 to 24 hours, flow velocity was not limit, and replaces blowdown then to turbidity<10mg/L, or range estimation water clear till.
Single devices can be soaked or spray Cleaning for High Capacity in this way, treat all softening dissolving of dirt after, water washes down and gets final product.
Present embodiment is the cleaning of having accepted Weifang calcium chloride factory vaporizer, because life-time service, tubulation internal surface knot has been given birth to a large amount of calcium sulfate dirts, reduces heat exchanger effectiveness greatly, reduces evaporation effect, and etching apparatus shortens service life of equipment, jeopardizes safety in production.
Adopt calcium sulfate (CaSO 4) dirty special neutral clean-out system, take the way of intermittent shower flushing, promptly cleaned up in 12 hours.Clean after detect, descaling rate is nearly 100%, and metal does not have corrosion phenomenon, and the hydrogen phenomenon of oozing of the iron and steel that is safe from harm produces, and it is nontoxic to clean waste liquid, discharges system with the aqueous solution, and free from environmental pollution.

Claims (3)

1. calcium sulfate dirt neutral cleaners; It is characterized in that: it comprises the raw material of following weight ratio: 5-15% hydroxy ethylene diphosphonic acid, 0.03-0.1%JFC, 3-10% solubility promoter, 0.03-0.1% non-ionic polyacrylamide; 0.5-1%NaOH, all the other are water.
2. calcium sulfate dirt neutral cleaners according to claim 1, it is characterized in that: the content of NaOH is that regulator solution arrives neutrality.
3. the working method of the described calcium sulfate dirt of a claim 1 neutral cleaners, it is characterized in that: it comprises the following steps:
A, get the raw material of following weight ratio: 5-15% hydroxy ethylene diphosphonic acid, 0.03-0.1%JFC, 3-10% solubility promoter, 0.03-0.1% non-ionic polyacrylamide;
B, the raw materials mix of steps A is even;
C, add NaOH0.5-1%, the pH value of the solution of step B is transferred to 7;
D, Jia Shui.
CN2010102180000A 2010-06-28 2010-06-28 Neutral calcium sulfate scale cleaning agent CN101955863B (en)

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CN2010102180000A CN101955863B (en) 2010-06-28 2010-06-28 Neutral calcium sulfate scale cleaning agent

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Application Number Priority Date Filing Date Title
CN2010102180000A CN101955863B (en) 2010-06-28 2010-06-28 Neutral calcium sulfate scale cleaning agent

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CN101955863A CN101955863A (en) 2011-01-26
CN101955863B true CN101955863B (en) 2012-02-15



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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505122B (en) * 2011-10-08 2014-04-23 四川久大制盐有限责任公司 Glauberite pipeline scale descaling agent and application thereof
CN102533478B (en) * 2012-01-11 2013-04-03 上海医疗器械股份有限公司齿科材料厂 Compound dissolving and cleaning agent of calcium-containing insoluble solid and manufacturing method thereof
CN102703233B (en) * 2012-06-01 2013-09-25 山东省泰和水处理有限公司 Cleaning agent for calcium sulfate scale
CN103242986B (en) * 2013-04-16 2014-06-18 太仓市宝马环境工程有限公司 Calcium sulfate scale cleaning agent and preparation method thereof
CN104017677B (en) * 2014-06-30 2017-02-15 深圳职业技术学院 Detergent for removing gypsum residues on dewaxing handicraft
CN104099153B (en) * 2014-07-17 2016-06-22 安徽理工大学 A kind of technique of coal desulfurization
CN104403816A (en) * 2014-12-06 2015-03-11 韦良富 Automobile water tank cleaning fluid
CN105645607A (en) * 2016-01-20 2016-06-08 范永禧 Descaling agent and preparation method thereof
CN109234027A (en) * 2018-10-15 2019-01-18 河南永业环保工程有限公司 A kind of boiler scale cleaning agent of highly effective and safe
CN110564518A (en) * 2019-09-16 2019-12-13 德蓝水技术股份有限公司 Special cleaning agent for calcium sulfate and preparation method thereof

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US6641754B2 (en) * 2001-03-15 2003-11-04 Betzdearborn Inc. Method for controlling scale formation and deposition in aqueous systems
CN1199885C (en) * 2002-10-23 2005-05-04 中国石油化工股份有限公司北京燕山分公司研究院 Composite scale resistant corrosion inhibitor and its use in reusing ammonia-nitrogen containing waste water in circulating cooling water
US7759299B2 (en) * 2006-07-24 2010-07-20 Ecolab Inc. Warewashing composition for use in automatic dishwashing machines
CN101705159B (en) * 2009-10-30 2011-10-19 常州市肯创环境工程技术有限公司 Cleaning agent
CN101735896A (en) * 2009-12-18 2010-06-16 天津工业大学 Cleaning agent for oil well cement

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