CN101817597A - Descaling liquid for circulating-water in thermal power plant and preparation method thereof - Google Patents
Descaling liquid for circulating-water in thermal power plant and preparation method thereof Download PDFInfo
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Abstract
The invention relates to descaling liquid for circulating-water in a thermal power plant, which is prepared from the raw materials in parts by weight as follows: 7-10 parts of phosphoric acid, 0.5-1.5 parts of citric acid, 0.3-0.5 part of urotropin, 0.3-0.5 part of oxalic acid, 1-3 parts of trisodium phosphate, 0.5-2 parts of urea, 0.5-15 parts of industrial salt, 0.3-0.8 part of a TX-10 emulsifier and 3-5 parts of a synergistic activating agent for high-molecular composite surface treatment. The descaling liquid can effectively and rapidly eliminate and dissolve water scales of the circulating-water in the thermal power plant, and form a protective film on a metal surface through which the circulating-water passes, thus having a good scale inhabitation and dispersion function, ensuring normal operation of a water heating and circulating system device, greatly prolonging maintenance and descaling period and service life of a boiler and the circulating system, and improving the operating efficiency of the thermal power plant. The descaling liquid has no any strong acid, halogen and various oil substances, no volatilization, no toxic and hazardous substances, no corrosion, no stimulus to human body and no environmental pollution.
Description
Technical field
The invention belongs to the incrustation scale processing technology field, is a kind of descaling liquid for circulating-water in thermal power plant and preparation method thereof that is used for.
Background technology
Heat power plant is thermal power generation, be water to be added thermogenesis steam with the boiler by the firing system that is core, change heat energy into mechanical energy by steam turbine then, by generator mechanical energy is transformed into the electric energy that can export utilization again, therefore in the generating production process, need to consume a large amount of recirculated water.Owing to be subjected to the restriction of current water conditioning technical qualification, recirculated water produces a large amount of incrustation scales at the heating vaporescence.These incrustation scale parts are deposited on the boiler heat transfer tube inwall, and another part then is suspended in the recirculated water, and cause the quickening of heat transfer tube inwall incrustation speed.The incrustation of heat transfer tube inwall causes the decline of boiler thermal output again, when incrustation reaches certain thickness, then need to stop production and remove, not only influence generating production efficiency, and its snaking operation extremely bothers, and time-consuming bothersome, it is also very undesirable to remove effect, make boiler not reach the nominal output rating, bring the waste of the energy simultaneously.It is to adopt chemical dosing that many industrial circulating waters are arranged at present, as add Scale inhibitors etc., but under the working temperature of low-temperature circulating water, water coolant, microorganism in the water very easily grows, and many Scale inhibitorss usually are the nutrition sources of microorganism, so, when adding Scale inhibitors, also need add a large amount of sterilant, algicide, poiser or the like usually.Chemical agent itself also is very serious to equipment, Corrosion of Pipeline in addition.Though it is fairly simple to carry out interim pickling, need stop equipment, influence is produced, bothersome effort, in addition, the waste liquid of cleaning also is very important to the pollution of environment.
Goal of the invention
The purpose of this invention is to provide and a kind ofly can remove incrustation scale and esy to use, safe and reliable, non-environmental-pollution,, harmless descaling liquid for circulating-water in thermal power plant non-stimulated and preparation method thereof fast human body and metal.
Realize that the technical scheme that purpose of the present invention is taked is: cleaning mixture of the present invention is formulated by following raw materials in weight portion: 15～50 parts in 7～10 parts of phosphoric acid, 0.5～1.5 part of citric acid, 0.3～0.5 part of urotropine, 0.3～0.5 part of oxalic acid, 1～3 part of tertiary sodium phosphate, 0.5～2 part in urea, 0.5～1.5 part of Industrial Salt, 0.3～0.8 part of TX-10 emulsifying agent, 5～10 parts of high polymer composite synergistic activators and water.
Compound method of the present invention is carried out according to the following steps:
(1), the preparation of aqueous solution of raw material: take by weighing various raw materials except that phosphoric acid and high polymer composite synergistic activator respectively by described proportional quantity, and be contained in respectively and add water and heating for dissolving in the container, stir, make aqueous feed solution respectively, wherein amount of water all is dissolved into solution state degree of being with this raw material respectively, and dissolving heating and temperature control scope is respectively: 25～35 ℃ of citric acids, 25～35 ℃ of urotropines, 25～35 ℃ of oxalic acid, tertiary sodium phosphate dissolve at normal temperatures, 25～35 ℃ in urea, 15～25 ℃ of Industrial Salts, 55～70 ℃ of TX-10 emulsifying agents.
(2) with phosphoric acid and high polymer composite synergistic activator and the aqueous feed solution of making, according to described prescription back one with the last item order of mixed preparing item by item, mixing and stirring successively, and fill up water by described proportional quantity, stir, promptly make descaling liquid for circulating-water in thermal power plant finished product of the present invention.
The present invention selects for use above-mentioned raw materials to make up, and can make each raw material effect produce synergy, thereby can fast and effeciently carry out the scale removal of circulating-water in thermal power plant.The function of each raw material is respectively:
Phosphoric acid: be slightly acidic, the effect that have rust cleaning, descales, and the metallic surface had certain phosphorization, and forming fine and closely woven phosphatize phosphate coat, the protective money metal surface prevents corrosion, is applicable to metal conditioner.
Citric acid: be a kind of stronger organic acid, soluble in water, heating can react with acid, alkali, glycerine etc., can be used as complexing agent, sequestering agent; As washing assistant, can improve the performance of cleaning product, can prevent pollutent again attached on the fabric, keep the necessary alkalescence of washing; Can improve the performance of tensio-active agent, be a kind of good intercalating agent.
Urotropine: be a kind of inhibiter commonly used, be used to slow down the Corrosion of Metallic Materials agent.
Oxalic acid: be slightly acidic, in raw material, play complexing action;
Tertiary sodium phosphate: the PHOSPHORIC ACID TECH.GRADE trisodium can be made treatment agent in Ethylene Diaminetetra Acetic Acid and the boiler feed water stove, tertiary sodium phosphate can with water in form bird nest easily soluble calcium salt, magnesium salts etc. work, generate in the throw out suspension what water such as insoluble calcium phosphate, trimagnesium phosphate, institute is so that boiler incrustation not.Simultaneously unnecessary tertiary sodium phosphate can also partly become the bird nest of having tied soft and comes off.Therefore steam coal be can save, the safety of boiler and the time limit of service of prolonged boiler safeguarded.In addition, also have infiltration and emulsifying effect.
Urea: be slight alkalinity, can generate salt, can be used for producing high molecular synthetic material, three polyoxy polyimide resins etc. with the acid effect.
Industrial Salt: as sanitas, can kill bacteria, suppress growing of microorganism in the recirculated water.
TX-10 emulsifying agent: the abbreviation that is alkylphenol polyoxyethylene, be a kind of nonionic surface active agent, have good wetting, infiltration, emulsification and washability, can prepare various detergents, to move, plant, mineral greasy dirt cleansing power extra-heavy, except that showing emulsifying property, and have the effect of destaticing, can be used as sanitas, wetting agent, be one of the important composition of water-base metal clean-out system again;
High polymer composite synergistic activator: formulated by multiple polymer substance, can strengthen the activity on organic pollution materials surface in the recirculated water, promote its degraded, be beneficial to separate impurities and removal.
This cleaning mixture is composite by above-mentioned various raw materials; common incrustation scales such as the lime carbonate in the circulating-water in thermal power plant, calcium sulfate, calcium phosphate there is good inhibition and removes function; zinc salt dirt, molysite dirt also there are good stably dispersing effect, especially can play excellent inhibition and provide protection copper in the recycle system, stainless steel and carbon steel device.This cleaning mixture also has very strong anti-oxychlorination ability and anti-hydrolysis ability, and variation water quality is had stronger appearance heat energy power.By the application of high polymer composite synergistic activator, can stop the increase of the little crystal grain of carbonate effectively, thereby prevent that the carbonate in the recirculated water from forming hard scale at heat exchanger surface; The phosphate component that adds can combine with the calcium ion in the water, forms protective membrane in the metallic surface that recirculated water passes through, and prevents corrosion of metal.This cleaning mixture can also with the reaction of divalent metal in the water, make the insolubles free settling not in the recirculated water, have remarkable scale inhibition divergent function.
According to the formulated descaling liquid for circulating-water in thermal power plant of above-mentioned raw materials, in the processing of circulating-water in thermal power plant, have following beneficial effect:
(1) can fast and effeciently remove incrustation scale in the solution heat electric power plant circulating water; and form protective membrane in metallic surface that recirculated water passes through; has good scale inhibition divergent function; thereby guarantee the normal operation of water heating and recycle system equipment; and maintenance, scale removal cycle and the work-ing life of prolonged boiler greatly, improve heat power plant's operational efficiency.
(2) by to effective removing of incrustation scale in the recirculated water, the life cycle that can not only prolong recirculated water, and can improve the thermo-efficiency of boiler significantly, reach save energy and water resources thus, the good result that improve generating production efficiency, reduces production costs.
(3) this cleaning mixture does not contain any strong acid, halogen and various oily substance, does not have volatilization, to human body toxicological harmless, the stingless excitation of no burn into, environmentally safe.
(4) to have using method simple for this cleaning mixture, advantage such as convenient to operation, safe and reliable.
Embodiment
Descaling liquid for circulating-water in thermal power plant of the present invention, its each component raw material and consumption proportion thereof are to grope to sum up gained in a large number through the contriver, select for use following raw material to make up, can make each raw material effect produce synergy, thereby can fast and effeciently remove the incrustation scale in the recirculated water, the scavenging solution that each component raw material is prepared in the following weight parts ratio range all has effect preferably: 7～10 parts of phosphoric acid, 0.5～1.5 part of citric acid, 0.3～0.5 part of urotropine, 0.3～0.5 part of oxalic acid, 1～3 part of tertiary sodium phosphate, 0.5～2 part in urea, 0.5～1.5 part of Industrial Salt, 0.3～0.8 part of TX-10 emulsifying agent, 15～50 parts in 5～10 parts of high polymer composite synergistic activators and water, wherein used " high polymer composite synergistic activator " separate case in first to file, the applying date: 2008.11.24, number of patent application is 200810231025.7, and can directly buy in Nanyang Hong Jinyuan chemical industry technical institute, its batching and preparation method repeat no more, and all the other each component raw material all can directly be bought on market.
Embodiment one
The weight part proportioning of each component raw material can be in the cleaning mixture of the present invention: 15 parts in 7 parts of phosphoric acid, 0.5 part of citric acid, 0.3 part of urotropine, 0.3 part of oxalic acid, 1 part of tertiary sodium phosphate, 0.5 part in urea, 0.5 part of Industrial Salt, 0.3 part of TX-10 emulsifying agent, 5 parts of high polymer composite synergistic activators and water.
This cleaning mixture can be prepared by the following method:
At first take by weighing other each component raw material except that phosphoric acid and high polymer composite synergistic activator by described proportioning, be contained in respectively to add water in the acid-resistant container and heat and dissolve, and stir and make the aqueous solution, its amount of water is degree so that each raw material all is dissolved as liquid state, and the dissolving heating and temperature control scope of each raw material is respectively: 25～35 ℃ of citric acids, 25～35 ℃ of urotropines, 25～35 ℃ of oxalic acid, tertiary sodium phosphate dissolve at normal temperatures, 25～35 ℃ in urea, 15～25 ℃ of Industrial Salts, 55～70 ℃ of TX-10 emulsifying agents.Then with phosphoric acid and high polymer composite synergistic activator and the above-mentioned various aqueous feed solution of making according to described prescription back one with the last item order of mixed preparing item by item, mixing and stirring successively, and fill up water by described proportional quantity, and stir, promptly make scavenging solution finished product of the present invention.This scavenging solution in use, can be by 10～20 extraordinarily water dilutions of scavenging solution weight, cleaning mixture solution after will dilute with volume pump or by variable valve every day adds at circulating-water in thermal power plant pump water inlet mouth place, the cleaning mixture injected volume of recirculated water is 6～10ml/L (calculating with the cleaning mixture before undiluted) in the normal course of operation, can be to the incrustation scale full scale clearance in the recirculated water, and can prevent the incrustation phenomenon of the recycle system effectively.
Embodiment two
The weight part proportioning of each component raw material also can be in the cleaning mixture of the present invention: 35 parts in 8.5 parts of phosphoric acid, 1 part of citric acid, 0.4 part of urotropine, 0.4 part of oxalic acid, 2 parts of tertiary sodium phosphates, 1.2 parts in urea, Industrial Salt .2 part, 0.6 part of TX-10 emulsifying agent, 8 parts of high polymer composite synergistic activators and water, its preparation method is identical with embodiment one with using method.
Embodiment three
The weight part proportioning of each component raw material can also be in the cleaning mixture of the present invention: 50 parts in 0 part of phosphatase 11,1.5 parts of citric acids, 0.5 part of urotropine, 0.5 part of oxalic acid, 3 parts of tertiary sodium phosphates, 2 parts in urea, 1.5 parts of Industrial Salts, 0.8 part of TX-10 emulsifying agent, 10 parts of high polymer composite synergistic activators and water, its preparation method is identical with embodiment one with using method.
Claims (5)
1. descaling liquid for circulating-water in thermal power plant is characterized in that: be formulated by following raw materials in weight portion: 7～10 parts of phosphoric acid, citric acid 0.5～1.5,0.3～0.5 part of urotropine, oxalic acid 0.3～0.5,1～3 part of tertiary sodium phosphate, 0.5～2 part in urea, Industrial Salt 0.5～15,0.3～0.8 part of TX-10 emulsifying agent, that the polymer compound surface is handled 3～5 parts of synergistic activators is formulated.
2. according to the descaling liquid for circulating-water in thermal power plant under the claim 1, it is characterized in that: the weight part of described each component raw material is joined and is: 15 parts in 7 parts of phosphoric acid, 0.5 part of citric acid, 0.3 part of urotropine, 0.3 part of oxalic acid, 1 part of tertiary sodium phosphate, 0.5 part in urea, 0.5 part of Industrial Salt, 0.3 part of TX-10 emulsifying agent, 5 parts of high polymer composite synergistic activators and water.
3. descaling liquid for circulating-water in thermal power plant according to claim 1 is characterized in that: the weight part proportioning of described each component raw material is: 35 parts in 8.5 parts of phosphoric acid, 1 part of citric acid, 0.4 part of urotropine, 0.4 part of oxalic acid, 2 parts of tertiary sodium phosphates, 1.2 parts in urea, Industrial Salt .2 part, 0.6 part of TX-10 emulsifying agent, 8 parts of high polymer composite synergistic activators and water.
4. according to the descaling liquid for circulating-water in thermal power plant under the claim 1, it is characterized in that: the weight part proportioning of described each component raw material is: 50 parts in 0 part of phosphatase 11,1.5 parts of citric acids, 0.5 part of urotropine, 0.5 part of oxalic acid, 3 parts of tertiary sodium phosphates, 2 parts in urea, 1.5 parts of Industrial Salts, 0.8 part of TX-10 emulsifying agent, 10 parts of high polymer composite synergistic activators and water.
5. preparation method who is used for the described descaling liquid for circulating-water in thermal power plant of claim 1, it is characterized in that: this method is carried out according to the following steps:
(1), the preparation of aqueous solution of raw material: take by weighing various raw materials except that phosphoric acid and high polymer composite synergistic activator respectively by described proportional quantity, and be contained in respectively and add water and heating for dissolving in the container, stir, make aqueous feed solution respectively, wherein amount of water all is dissolved into solution state degree of being with this raw material respectively, and dissolving heating and temperature control scope is respectively: 25～35 ℃ of citric acids, 25～35 ℃ of urotropines, 25～35 ℃ of oxalic acid, tertiary sodium phosphate dissolve at normal temperatures, 25～35 ℃ in urea, 15～25 ℃ of Industrial Salts, 55～70 ℃ of TX-10 emulsifying agents.
(2) with phosphoric acid and high polymer composite synergistic activator and the aqueous feed solution of making, according to described prescription back one with the last item order of mixed preparing item by item, mixing and stirring successively, and fill up water by described proportional quantity, stir, promptly make descaling liquid for circulating-water in thermal power plant finished product of the present invention.
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| CN104556424A (en) * | 2014-11-14 | 2015-04-29 | 无锡伊佩克科技有限公司 | High-hardness high-alkalinity phosphorus-free scale and corrosion inhibitor and preparation method thereof |
| CN104906961A (en) * | 2015-06-05 | 2015-09-16 | 宁波市川宁环保科技有限公司 | Novel reverse-osmosis scale inhibitor |
| CN108048235A (en) * | 2018-01-19 | 2018-05-18 | 车神宝汽车服务江苏有限公司 | Powerful general cleaning mixture |
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| CN108822979A (en) * | 2018-06-29 | 2018-11-16 | 河南妙天控股有限公司 | A kind of industrial thermal pipe cleaning solution for descaling and preparation method thereof |
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| CN110921853A (en) * | 2019-11-12 | 2020-03-27 | 北京杰信越发制冷设备安装工程有限公司 | Anticorrosive environment-friendly scale remover capable of rapidly removing scale and preparation method and application thereof |
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- 2010-01-25 CN CN2010101002716A patent/CN101817597B/en not_active Expired - Fee Related
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| US9085748B2 (en) | 2011-05-17 | 2015-07-21 | Geo Estratos, S.A. De C.V. | Stabilized pipe scaling remover and inhibitor compound |
| WO2012158009A1 (en) * | 2011-05-17 | 2012-11-22 | Geo Estratos, S.A. De C.V. | Stabilised compound eliminating and inhibiting scale in pipelines |
| CN103949154A (en) * | 2014-05-08 | 2014-07-30 | 夏光甫 | Automobile exhaust emission purification treatment fluid |
| CN103949154B (en) * | 2014-05-08 | 2015-09-23 | 河南铭源环保科技有限公司 | Motor vehicle exhaust emission purified treatment liquid |
| CN104556424A (en) * | 2014-11-14 | 2015-04-29 | 无锡伊佩克科技有限公司 | High-hardness high-alkalinity phosphorus-free scale and corrosion inhibitor and preparation method thereof |
| CN104906961B (en) * | 2015-06-05 | 2019-02-12 | 宁波市川宁环保科技有限公司 | Reverse osmosis antisludging agent |
| CN104906961A (en) * | 2015-06-05 | 2015-09-16 | 宁波市川宁环保科技有限公司 | Novel reverse-osmosis scale inhibitor |
| CN108048235A (en) * | 2018-01-19 | 2018-05-18 | 车神宝汽车服务江苏有限公司 | Powerful general cleaning mixture |
| CN108485828A (en) * | 2018-03-19 | 2018-09-04 | 仝建乐 | A kind of heat exchanger cleaning agent and preparation method thereof |
| CN108751447A (en) * | 2018-06-29 | 2018-11-06 | 河南妙天控股有限公司 | A kind of steam power plant's scale removal coolant liquid and preparation method thereof |
| CN108822979A (en) * | 2018-06-29 | 2018-11-16 | 河南妙天控股有限公司 | A kind of industrial thermal pipe cleaning solution for descaling and preparation method thereof |
| CN110081768A (en) * | 2019-06-06 | 2019-08-02 | 大唐东营发电有限公司 | A kind of condenser of power plant descaling method |
| CN110921853A (en) * | 2019-11-12 | 2020-03-27 | 北京杰信越发制冷设备安装工程有限公司 | Anticorrosive environment-friendly scale remover capable of rapidly removing scale and preparation method and application thereof |
| CN110921853B (en) * | 2019-11-12 | 2022-05-27 | 北京杰信越发制冷设备安装工程有限公司 | Anticorrosive environment-friendly scale remover capable of rapidly removing scale and preparation method and application thereof |
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