CN101468351A - Method for removing fat from large-sized equipment using ultrasonic technology at normal temperature - Google Patents
Method for removing fat from large-sized equipment using ultrasonic technology at normal temperature Download PDFInfo
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- CN101468351A CN101468351A CNA2007100510038A CN200710051003A CN101468351A CN 101468351 A CN101468351 A CN 101468351A CN A2007100510038 A CNA2007100510038 A CN A2007100510038A CN 200710051003 A CN200710051003 A CN 200710051003A CN 101468351 A CN101468351 A CN 101468351A
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- degreaser
- ultrasonic wave
- ultrasonic
- cleaning
- degreasing
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Abstract
The invention relates to a cyclic degreasing method for chemical cleaning, which is characterized in that a cleaning liquid can totally remove the grease of equipment at normal temperature after ultrasonic treatment, wherein the cleaning liquid comprises a complexing/chelating agent, and the concentrations of alkaline matters and surfactants in the cleaning liquid are low, and the two substances do not contain phosphate. The degreasing method is particularly suitable for the chemical cleaning of large-scale equipment.
Description
One, technical field
The present invention relates to a kind of improvement of circulating Chemical cleaning degreasing process.Utilize ultrasonic generator that degreaser is carried out ultrasonic wave and handle, need not external heat thereby reach under low drug concentration condition, at normal temperatures can be with grease from all kinds of workpiece purpose that removes of main equipment surface particularly.And realized the generalization of not phosphatic degreaser preparation water.
Two, background technology
To main equipment, large-scale especially heat transmission equipment, carrying out Chemical cleaning as boiler, heat exchanger is industrialized unit indispensable important link before operation and in the maintenance process.
Chemical cleaning of large-scale equipment is to adopt circulating chemical cleaning method basically.Usually the circulating Chemical cleaning flow process that adopts is with reservoir, pump and need that the circulation that equipment connected into of cleaning is closed circuit to be constituted by pipeline.
Degreasing is a step in the Chemical cleaning.New equipment or be subjected to used equipment that greasy dirt dyes before pickling all needs to carry out ungrease treatment, to guarantee the quality of pickling and passivation.
Degreaser is made up of alkaline matter, surfactant and deionized water.
Alkaline matter generally is one or more in carbonate, bicarbonate, silicate, hydroxide, phosphate, the hydrophosphate.
Surfactant can be a kind of or/and several in anion surfactant such as alkylbenzenesulfonate, α-Xi Jihuangsuanyan, olefin sulfonate and hydroxyl paraffin sulfonate, alkyl sulfate, fatty alcohol polyoxyethylene ether sulfate (ester), α-sulfonated fatty acid ester, the secondary alkyl sulfonate; Also can be a kind of in cationic surfactant such as amine salt type cationic surfactant, the quaternary ammonium salt cationic surfactant or/and several; A kind of in non-ionic surface active agent such as polyethylene glycol type non-ionic surface active agent, polyol-based non-ionic surfactant, alkyl polyoxyethylene ether and the APES or/and several; A kind of in amphoteric surfactant such as amino acid type amphoteric surfactant, betaine type amphoteric surfac-tant, the methenamine type amphoteric surfactant or/and several.
In degreaser, the concentration of alkaline matter is generally 0.3～0.5%, and surfactant concentrations is generally 0.1～0.3%.
Temperature requirement is greater than 85 ℃ in the skimming processes.
Because degreaser basicity is higher, the temperature that operating process requires is higher, and the hardness component in the light water easily forms CaCO
3, Mg (OH)
2Etc. precipitation, not only can reduce the basicity of degreaser, also can be attached to the reagent consumption amount of pickling after the increase degreasing on the equipment.Therefore preparing degreaser need use deionized water.In order to satisfy the temperature requirement of degreasing, generally need to use Steam Heating.For cleaning by degreasing heating uses steam to have very big danger in practical operation temporarily, and put into operation preceding or during parking maintenance, often do not possess the condition of heating steam of providing and deionized water at a lot of devices.
For these reasons, realize that cleaning by degreasing normal temperatureization of handling and the generalization of preparing the degreaser water have very strong practical significance.
Ultrasonic wave is that a kind of elastic mechanical ripple in the physical medium and electricity, magnetic, light etc. are a kind of physical energy form equally.Difference according to purposes can be divided into the ultrasonic and power ultrasonic two big classes of detection.
Because a series of physical effects that ultrasonic wave has in water, ultrasonic technology is particularly obtaining good application aspect scale inhibition and the scale removal in water treatment closely during the last ten years.
" ultrasonic wave water technology " book introduction that Zhang Guangming etc. are write, the ultrasonic wave that is used for water treatment and acyclic submergence slot type cleaning by degreasing mainly is a power ultrasonic.
Ultrasonic cavitation is a kind of distinctive physical process that power ultrasonic causes in liquid medium.The microbubble (cavitation nucleus) that is present in the liquid vibrates under the effect of sound field, and when acoustic pressure reached certain value, bubble expanded rapidly, and is closed suddenly then, produces shock wave when bubble is closed, causes the final collapse of bubble.A series of dynamic processes such as this micro-bubble vibration, expansion, closure, collapse are called acoustic cavitation (Acoustic Cavitation).Microbubble will produce physical effects such as a series of high pressure, high heat in the moment that closure bursts.The diameter of microbubble is usually in micron level.The local pressure that the cavitation place takes place can reach thousands of atmospheric pressure.Meanwhile microbubbles rupture can also produce speed very high (〉 300m/s) shock wave.This shock wave acts on surface of the work and pollutant can be peeled off from surface of the work.
The mechanical effect that power ultrasonic produces in communication process shows as the alternate compression and the extension of particle, causes the vibration of medium particle, and build-up of pressure changes, and its particle acceleration can surpass tens thousand of times of acceleration of gravity.Power ultrasonic exists energy to change by medium the time, and the periodicity deflation of medium particle can cause the particle increase in temperature, and intermolecular violent relative motion meeting generation frictional heat, and these all show as power ultrasonic and have fuel factor in medium.
The data introduction is arranged, and the spread speed of ultrasonic wave in 20 ℃ of water can reach 1480m/s.Though measure the decay of ultrasonic wave in medium is a thing of difficulty relatively, and evidence is arranged, and water is handled through power ultrasonic and not obviously decay of the ultrasonic intensity in the water behind the conveying 1500m in pipeline.
Based on cavitation effect, mechanical effect and the fuel factor of ultrasonic wave in water, power ultrasonic also is used for the acyclic submergence slot type cleaning and degreasing of workpiece gradually, but in circulating cleaning and degreasing technology, but nobody carries out corresponding research work.
For Ca in the light water under alkali condition
2+, Mg
2+Can form CaCO
3, Mg (OH)
2Phenomenon Deng precipitation, processing method has been arranged at present, for example in recirculated cooling water is handled general using organic phosphine acids material as 1,1-hydroxy ethylidene-1,1-di 2 ethylhexyl phosphonic acid (HEDPA), 2-phosphonic acid butane-1,2, the complexing/chelating ability of 4-tricarboxylic acids (PBTCA) etc. stops the formation of precipitation.But contain phosphorus in the organic phosphine acids material, in water body, can decompose the phosphate that generation causes body eutrophication.
Three, summary of the invention
Chamber work is observed by experiment, and in circulating chemical degreasing cleaned, the cleaning fluid after normal temperature is handled through ultrasonic wave down is equivalent to this cleaning fluid to the degreasing effect of workpiece not to be handled by ultrasonic wave and adopting electric furnace to be heated to 85 ℃～95 ℃ degreasing effect.Scale-up has further been verified this phenomenon.
In scale-up and commercial Application, observe, in circulating Chemical cleaning flow process, though connected hardware, valve, a large amount of steel flanges, steel straight tube, steel bend pipe and rubber hose, but all do not cause the obvious decay of ultrasonic intensity in the degreaser, degreasing effect is uninfluenced.
A large amount of tests also show, owing to adopted the power ultrasonic wave technology in circulating Chemical cleaning, are reaching under the existing circulating Chemical cleaning degreasing effect prerequisite, can reduce the working concentration of alkaline matter, surfactant significantly.
The reduction of drug concentration can make the COD in the degreasing wasting liquid in the cleaning fluid
CrReduce to about 150～1000mg/L from the 6000mg/L of traditional high temperature degreasing method, alleviated the pressure of wastewater treatment.
Why in the circulating Chemical cleaning skimming processes of normal temperature, the degreaser that the process power ultrasonic is handled shows the variation on the performance, be hyperacoustic cavitation effect, mechanical effect, fuel factor and the long fast coefficient result of propagation effect, the synergy of these effects has promoted that degreaser neutral and alkali material and surfactant reach the purpose that grease is removed from equipment to the emulsification of grease under the normal temperature.
In laboratory and scale-up and commercial Application, the chemical assistant that has adopted phosphorus element-containing not and had complexing/chelating ability is handled the hardness in the light water, guarantee deposit-free generation in the cleaning fluid under alkali condition, thereby reached the purpose that replaces deionized water with light water.
The degreaser that adopts in the degreasing process of the present invention basic composition is alkaline matter, surfactant, complexing/chelating auxiliary agent, light water.According to the cleannes of equipment and oil content what, the concentration of alkaline matter, surfactant, complexing/chelating auxiliary agent is respectively 0.03%～0.2%, 0.005%～0.05%, 0.005%～0.1%.The pH value of degreaser is 7～10.5.
Degreasing process of the present invention is applicable to all kinds of heat exchangers that carbon steel, stainless steel, copper, aluminium, lead, titanium, magnesium and alloy thereof make, the cleaning by degreasing of boiler, also is applicable to the cleaning by degreasing that adopts all types of workpiece that circulating cleaning process made by above-mentioned material.
Four, the specific embodiment
Embodiment 1:
To water side volume is 25.5m
3Simple steel heat exchanger carries out cleaning by degreasing.
Reservoir, pump, tubular ultrasonic wave producer, heat exchanger and rubber hose are connected into the loop.The power of tubular ultrasonic wave producer is 5kw.
In reservoir according to NaOH 0.2%, APES (OP-10) 0.05%, the concentration of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.01% preparation degreaser uses ordinary tap water.Degreaser pH value is 9.55.
Start supersonic generator.Start pump, the degreaser in the reservoir is flowed through and is entered the heat exchanger of required cleaning behind the tubular type supersonic generator, returns reservoir.
Whole cleaning process was kept 12 hours, rinse liquid temperature 10 ℃ of 21 ℃ of rising to when cleaning end from the outset.
After further finishing pickling, passivation, open this equipment inspection, find that degreasing effect has reached pickling, the passivation requirement to degreasing process.
Embodiment 2
To water side volume is 1m
3The copper heat exchanger carries out cleaning by degreasing.
Reservoir, pump, tubular ultrasonic wave producer, heat exchanger and rubber hose are connected into the loop.The power of tubular ultrasonic wave producer is 3kw.
In reservoir according to sodium carbonate 0.02%, sodium acid carbonate 0.01%, dodecyl benzyl dimethyl ammonium chloride (1227) 0.02%, the concentration of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.005% preparation degreaser uses ordinary tap water.Degreaser pH value is 7.85.
Start supersonic generator.Start pump, the degreaser in the reservoir is flowed through and is entered the heat exchanger of required cleaning behind the tubular type supersonic generator, returns reservoir.
Whole cleaning process was kept 8 hours, rinse liquid temperature 18 ℃ of 24 ℃ of rising to when cleaning end from the outset.
Clean the back and check not have grease through the part of cleaning.
Embodiment 3
To volume is 10m
3The titanium heat exchanger carries out cleaning by degreasing.
Reservoir, pump, tubular ultrasonic wave producer, heat exchanger and rubber hose are connected into the loop.The power of tubular ultrasonic wave producer is 5kw.
In reservoir according to sodium carbonate 0.1%, neopelex 0.05%, the concentration of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.1% preparation degreaser uses ordinary tap water.Degreaser pH value is 8.25.
Start supersonic generator.Start pump, wash cycles.
Whole cleaning process was kept 14 hours, rinse liquid temperature 27 ℃ of 39 ℃ of rising to when cleaning end from the outset.
Clean the back and check, no grease in the pipeline.
Embodiment 4:
To volume is that 63 liters al-mg alloy pipe inwall carries out cleaning by degreasing.
Reservoir, pump, rubber hose and al-mg alloy pipe are connected into the loop.The part of rubber hose is placed the groove type ultrasonic wave producer.The power of supersonic generator is 1kw.
In reservoir according to sodium carbonate 0.05%, APES (OP-10) 0.005%, the concentration of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.005% preparation degreaser uses ordinary tap water.Degreaser pH value is 8.05.
Start supersonic generator.Start pump, wash cycles.
Whole cleaning process was kept 16 hours, rinse liquid temperature 15 ℃ of 23 ℃ of rising to when cleaning end from the outset.Clean the back and check, no grease in the pipeline.
Embodiment 5
To volume is that 50 liters lead container carries out cleaning by degreasing.
Reservoir, pump, rubber hose and lead container are connected into the loop.The part of rubber hose is placed the groove type ultrasonic wave producer.The power of supersonic generator is 1kw.
In reservoir according to sodium carbonate 0.07%, APES (OP-10) 0.03%, dodecyl benzyl dimethyl ammonium chloride (1227) 0.01%, the concentration preparation degreaser of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.05% uses ordinary tap water.Degreaser pH value is 8.10.
Start supersonic generator.Start pump, wash cycles.
Whole cleaning process was kept 12 hours, rinse liquid temperature 24 ℃ of 30 ℃ of rising to when cleaning end from the outset.Clean the back and check, no grease in the pipeline.
Embodiment 6
To steam production is that the carbon steel boiler of 40t/h carries out cleaning by degreasing.
Reservoir, pump, tubular ultrasonic wave producer, boiler are connected into the loop with flange, rubber hose.The power of tubular ultrasonic wave producer is 5kw.
In reservoir according to sodium carbonate 0.15%, sodium acid carbonate 0.05%, APES (OP-10) 0.05%, the concentration of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.05% preparation degreaser uses ordinary tap water.Degreaser pH value is 8.75.
Start supersonic generator.Start pump, wash cycles.
Whole cleaning process was kept 12 hours, rinse liquid temperature 15 ℃ of 25 ℃ of rising to when cleaning end from the outset.
After further finishing pickling, passivation, open this equipment inspection, find that degreasing effect has reached pickling, the passivation requirement to degreasing process.
Embodiment 7
To the 20m that newly buys back
3Stainless steel Raschig ring carries out cleaning by degreasing.
Reservoir, pump, tubular ultrasonic wave producer and rubber hose are connected into the loop.Raschig ring is placed reservoir.The power of tubular ultrasonic wave producer is 5kw.
In reservoir according to sodium carbonate 0.15%, sodium acid carbonate 0.05%, neopelex 0.01%, the concentration of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.05% preparation degreaser uses ordinary tap water.Degreaser pH value is 8.80.
Start supersonic generator.Start pump, the degreaser of reservoir is flowed through and is got back to reservoir behind the tubular type supersonic generator.
Whole cleaning process was kept 24 hours, rinse liquid temperature 17 ℃ of 36 ℃ of rising to when cleaning end from the outset.
After crossing cleaning by degreasing, the residual oil content of measuring on the Raschig ring is 0.
Embodiment 8
To the 15m that newly buys back
3Stainless steel Pall ring carries out cleaning by degreasing.
Reservoir, pump, tubular ultrasonic wave producer and rubber hose are connected into the loop.Pall ring is placed reservoir.The power of tubular ultrasonic wave producer is 3kw.
In reservoir according to sodium carbonate 0.1%, sodium acid carbonate 0.05%, neopelex 0.05%, the concentration of disodium ethylene diamine tetraacetate (EDTA-2Na) 0.03% preparation degreaser uses ordinary tap water.Degreaser pH value is 8.65.
Start supersonic generator.Start pump, the degreaser of reservoir is flowed through and is got back to reservoir behind the tubular type supersonic generator.
Whole cleaning process was kept 28 hours, rinse liquid temperature 20 ℃ of 36 ℃ of rising to when cleaning end from the outset.
Through after the cleaning by degreasing, the residual oil content of measuring on the Pall ring is 0.
It is as follows to measure on Raschig ring/Pall ring the principle of oil content among embodiment 7 and the embodiment 8:
Grease has maximum absorption band under spectrophotometric ultraviolet spectra district 260nm wavelength, and oil content and absorbance are linear under this wavelength.
With cyclohexane the grease of Raschig ring/Pall ring is carried out extracting, under 260nm, measure the absorbance of extract, this absorbance and calibration curve are contrasted, can calculate the oil content on Raschig ring/Pall ring.
Claims (10)
- The degreasing method of 1 one kinds of circulating Chemical cleaning is characterized in degreaser process ultrasonic unit processing in cyclic process.
- 2 according to the described degreasing method of claim 1, is characterized in and can uses at normal temperatures, does not need degreaser is heated.
- 3 according to the described degreasing method of claim 1, is characterized in containing in the degreaser complexing/chelating auxiliary agent.
- 4 according to the described degreasing method of claim 1, is characterized in not phosphorous hydrochlorate in the degreaser.
- 5 according to the described degreasing method of claim 1, is characterized in that degreaser is made of by mass percentage following component: 0.03%～0.2% alkaline matter, 0.005%～0.05% surfactant, 0.005%～0.1% complexing/chelating agent, excess water.
- 6 are meant tubular type, slot type or other forms of ultrasonic generator according to the described ultrasonic unit of claim 1.
- 7 according to the described complexing of claim 3/chelating auxiliary agent, being meant and can preventing that calcium in the sealing, magnesium ion generate the material of precipitation under alkali condition, is a kind of or/and several in carboxylic acid, polyalcohol, polyhydric phenols, organic amine, nitrogen-containing heterocycle compound, amino carboxylic acid and the salt compound.
- 8 according to the described tubular ultrasonic wave generating device of claim 6 be meant with the used pump of circulating Chemical cleaning or/and reservoir or/and pipeline or/and need the equipment of cleaning by degreasing blue or/and the supersonic generator that other modes are connected with valve, the ultrasonic wave generating device direct impregnation of this generator is carried out ultrasonic wave to degreaser and is handled in degreaser.
- 9 are meant according to the described groove type ultrasonic wave generating device of claim 6 and can carry the pipeline of degreaser to be placed in one, and can see through pipeline carry out the ultrasonic wave processing to degreaser in the pipeline ultrasonic generator.
- 10 are meant according to the described other forms of ultrasonic generator of claim 6 and are different from above-mentioned two kinds of forms but can carry out the ultrasonic generator that ultrasonic wave is handled to circulating Chemical cleaning degreaser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100510038A CN101468351A (en) | 2007-12-27 | 2007-12-27 | Method for removing fat from large-sized equipment using ultrasonic technology at normal temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100510038A CN101468351A (en) | 2007-12-27 | 2007-12-27 | Method for removing fat from large-sized equipment using ultrasonic technology at normal temperature |
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|---|---|
| CN101468351A true CN101468351A (en) | 2009-07-01 |
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| CNA2007100510038A Pending CN101468351A (en) | 2007-12-27 | 2007-12-27 | Method for removing fat from large-sized equipment using ultrasonic technology at normal temperature |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480597A (en) * | 2013-09-13 | 2014-01-01 | 攀枝花云钛实业有限公司 | Residual titanium cleaning method |
| CN104399695A (en) * | 2014-11-26 | 2015-03-11 | 成都川硬合金材料有限责任公司 | Ultrasonic washing process applicable to zinc surface |
| CN105887107A (en) * | 2016-04-15 | 2016-08-24 | 张向明 | Novel efficient and environment-friendly aqueous cleaning solution for engines |
| CN106824904A (en) * | 2016-12-26 | 2017-06-13 | 安徽雷萨重工机械有限公司 | A kind of minimizing technology of sheet metal surface curing grease |
| CN106944952A (en) * | 2017-04-12 | 2017-07-14 | 华瑞（江苏）燃机服务有限公司 | A kind of gas turbine fuel nozzles maintenance craft |
| CN108362166A (en) * | 2018-01-10 | 2018-08-03 | 马斌祥 | A kind of space division mainboard type heat exchanger inside greasy dirt cleaning method |
| CN109967467A (en) * | 2019-03-04 | 2019-07-05 | 扬州中天利新材料股份有限公司 | The Hand scarf method of tank body oil-soluble deposition oil |
| CN114889040A (en) * | 2022-01-18 | 2022-08-12 | 深圳市栢迪科技有限公司 | Method for manufacturing composite gear |
-
2007
- 2007-12-27 CN CNA2007100510038A patent/CN101468351A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480597A (en) * | 2013-09-13 | 2014-01-01 | 攀枝花云钛实业有限公司 | Residual titanium cleaning method |
| CN104399695A (en) * | 2014-11-26 | 2015-03-11 | 成都川硬合金材料有限责任公司 | Ultrasonic washing process applicable to zinc surface |
| CN105887107A (en) * | 2016-04-15 | 2016-08-24 | 张向明 | Novel efficient and environment-friendly aqueous cleaning solution for engines |
| CN105887107B (en) * | 2016-04-15 | 2019-03-12 | 福建省纯杰绿色科技有限公司 | A kind of efficient environmental-protection engine aqueous rinsing liquid |
| CN106824904A (en) * | 2016-12-26 | 2017-06-13 | 安徽雷萨重工机械有限公司 | A kind of minimizing technology of sheet metal surface curing grease |
| CN106944952A (en) * | 2017-04-12 | 2017-07-14 | 华瑞（江苏）燃机服务有限公司 | A kind of gas turbine fuel nozzles maintenance craft |
| CN108362166A (en) * | 2018-01-10 | 2018-08-03 | 马斌祥 | A kind of space division mainboard type heat exchanger inside greasy dirt cleaning method |
| CN109967467A (en) * | 2019-03-04 | 2019-07-05 | 扬州中天利新材料股份有限公司 | The Hand scarf method of tank body oil-soluble deposition oil |
| CN114889040A (en) * | 2022-01-18 | 2022-08-12 | 深圳市栢迪科技有限公司 | Method for manufacturing composite gear |
| CN114889040B (en) * | 2022-01-18 | 2024-04-30 | 深圳市栢迪科技有限公司 | Method for manufacturing composite gear |
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Open date: 20090701 |