CN105605964A - Descaling method for steam boiler - Google Patents
Descaling method for steam boiler Download PDFInfo
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- CN105605964A CN105605964A CN201510967926.2A CN201510967926A CN105605964A CN 105605964 A CN105605964 A CN 105605964A CN 201510967926 A CN201510967926 A CN 201510967926A CN 105605964 A CN105605964 A CN 105605964A
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- steam boiler
- descaling method
- steam
- scale
- descaling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G7/00—Cleaning by vibration or pressure waves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a descaling method for a steam boiler. An ultrasonic generator is arranged in the steam boiler. The descaling method for the steam boiler includes the following steps that A, a descaling agent is injected; B, the ultrasonic generator is started; C, gas in the steam boiler is exhausted; D, liquid in the steam boiler is drained. According to the descaling method for the steam boiler, by means of an ultrasonic cleaning method, hard water scale can be rapidly and effectively removed in an omni-bearing mode, the descaling agent can be in an environment-friendly household formula, and is safe in use, easy to obtain and low in corrosivity, and at least three effects of removing the scale, resisting the scale and preventing corrosion to the steam boiler can be achieved.
Description
Technical field
The present invention relates to household appliance technical field, especially relate to a kind of descaling method of steam boiler.
Background technology
Steam boiler, in the process of heating water, can particularly form hard, fine and close incrustation scale in heat pipe on heating surface,These incrustation scales can produce a lot of harmful effects, but also are difficult to remove. In correlation technique, point out, for the incrustation scale in clean stove,Steam boiler need to be taken apart, or adopt physical mechanical to clean with chemical detergent and brush, such cleaning is not only time-consumingEffort, and do not wash clean clearly, some dead angle or corner even cannot clean to, and in addition, chemical is mostly strongAcid, to the body of heater seriously corroded of steam boiler, operates also dangerously, and contaminated environment, especially in household electrical applianceSmall size steam boiler, this mechanical-physical cleans more difficult carrying out. In addition, in order to remove incrustation scale, need to shut down and carry out, like this,Not only can increase recondition expense, and shorten the service life of steam boiler.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art. For this reason, the invention reside in and propose a kind of steamingThe descaling method of boiler furnace, described descaling method is quick, effective.
According to the descaling method of the steam boiler of the embodiment of the present invention, in described steam boiler, ultrasonic generator is set, described removingDirt method comprises the following steps: A, injection scale remover; B, open described ultrasonic generator; C, by described steam boilerGas is discharged; Liquid in D, exhaust steam boiler.
According to the descaling method of steam boiler of the present invention, by adopting ultrasonic cleaning method, can be quick, comprehensive and haveObstinate incrustation scale is removed on effect ground, and scale remover can be environmental protection domestic type formula, uses safety, easily acquisition, corrosivity little,And can play scale removal, scale inhibition and prevent triple beneficial effects of steam boiler corrosion.
In certain embodiments, before steps A, further comprising the steps of: E: in steam boiler, temperature is cooled to 30 DEG C-60 DEG C.
In certain embodiments, before step D, further comprising the steps of: F: the insulation scheduled time in described steam boilert1。
In certain embodiments, before described step F, further comprising the steps of: G: to stop the water inlet in steam boiler and go outWater.
In certain embodiments, described step B and described step G order are carried out or are carried out simultaneously.
In certain embodiments, described step B and step C order are carried out or are carried out simultaneously.
In certain embodiments, described step C is repeated multiple times, and at least one times before step B, at least one times in stepAfter B.
In certain embodiments, after described step D, further comprising the steps of: H, softening to injecting in described steam boilerSolution left standstill time T 2, and discharge.
In certain embodiments, described step H n time repeatedly, n >=1.
In certain embodiments, between described step D and step H or in described step H, also further comprise: I:In described steam boiler, inject antirust neutralizer.
In certain embodiments, described neutralizer is strong base weak acid salt buffering liquid.
In certain embodiments, described scale remover is weak acid or low acidic oxides.
In certain embodiments, described scale remover is acetic acid.
Additional aspect of the present invention and advantage in the following description part provide, and part will become bright from the following descriptionAobvious, or recognize by practice of the present invention.
Brief description of the drawings
Fig. 1 is according to the structural representation of the steam boiler of the embodiment of the present invention;
Fig. 2 is the scale removal flow chart that adopts the steam boiler of the method shown in Fig. 1.
Reference numeral:
Steam boiler 100;
Body of heater 1; Water inlet 11; Water intaking valve 12; Delivery port 13; Outlet valve 14;
Scale remover box 2; Ultrasonic generator 3.
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, wherein identical from start to finishOr similarly label represents same or similar element or has the element of identical or similar functions. Below by retouching with reference to accompanying drawingThe embodiment stating is exemplary, is intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing below provides many different embodiment or example to be used for realizing different structure of the present invention. In order to simplify thisDisclosure of an invention, hereinafter the parts to specific examples and setting are described. Certainly, they are only example, and orderDo not lie in restriction the present invention. In addition, the present invention can be in different examples repeat reference numerals and/or letter. This repetitionTo be in order simplifying and object clearly, itself not indicate the relation between discussed various embodiment and/or setting. In addition,The various specific technique the invention provides and the example of material, but those of ordinary skill in the art can recognize otherThe property of can be applicable to of technique and/or the use of other materials.
Below with reference to Fig. 1 and Fig. 2, describe according to the steam boiler 100 of the embodiment of the present invention, the steam copper of the embodiment of the present inventionStove 100 can be applied in the household electrical appliance such as steam cleaner or vapour iron, wherein, and steam cleaner, vapour iron etc.Other form and operation principle should be well known to those skilled in the art, here no longer detailed description.
As shown in Figure 1, adopt above-mentioned descaling method to carry out scale removal, steam according to the steam boiler 100 of the embodiment of the present inventionBoiler 100 comprises: body of heater 1, water pump, ultrasonic generator 3, air bleeding valve and scale removal button.
As shown in Figure 1, body of heater 1 has water inlet 11, delivery port 13 and exhaust outlet, wherein, and in the time that water inlet 11 is opened,Liquid can inject in body of heater 1 by water inlet 11, and in the time that delivery port 13 is opened, the liquid in body of heater 1 can be by going outDischarge at the mouth of a river 13, and in the time of Exhaust Open, the gas in body of heater 1 can be discharged by exhaust outlet, controls for convenience water inlet11 switch, can arrange water intaking valve 12 at water inlet 11 places, controls for convenience the switch of delivery port 13, can be in water outletMouth 13 places set out water valve 14, control for convenience the switch of exhaust outlet, can air bleeding valve be set in exhaust ports.
Wherein, air bleeding valve can be preset with preset pressure limiting value (for example, can be greater than 1 standard large for preset pressure limiting valueAtmospheric pressure value), thereby air bleeding valve can be configured in the time that steam boiler 100 internal pressures are greater than preset pressure limiting value automaticallyOpen. That is to say, in the time that body of heater 1 internal pressure exceedes preset pressure limiting value, just automatically open and realize exhaust. Thus,Reduced the complexity of control program, and the switch control of exhaust outlet is reliable. Certainly, the invention is not restricted to this, air bleeding valve alsoCan rely on user's ACTIVE CONTROL and passive open. In addition, air bleeding valve can also be configured to due to the interior pressure of steam boiler 100Power is greater than steam boiler 100 external pressures and the unidirectional check valve of opening that is to say, air bleeding valve by body of heater 1 inside and outside differential pressure fromThe valve of moving gauge tap, thus, reduced the complexity of control program, and the switch control of exhaust outlet is reliable. FurtherGround, air bleeding valve also can, for being arranged on the check valve sheet of exhaust ports, enter thereby air bleeding valve can prevent the air outside body of heater 1Enter in body of heater 1, guarantee the efficiency of heating surface of steam boiler 100, improve the functional reliability of steam boiler 100.
Water pump is connected with to the interior pumping liquid of body of heater 1 with water inlet 11, that is to say, when starting mode of pump and when water inlet 11After opening, water pump can pump into liquid (such as scale remover or clear water etc.) in body of heater 1 by water inlet 11, ultrasonicRaw device 3 is located in body of heater 1, thereby after ultrasonic generator 3 starts, can make the interior generation of body of heater 1 ultrasonic, scale removal buttonBe located on body of heater 1 and start to carry out scale removal to control, that is to say, after scale removal button is triggered, scale removal program starts to carry out.Ultrasonic generator 3 is preferably the adjustable low profile edge ultrasonic generator of vibration frequency. In order to realize scale removal program, steam copperStove 100 can comprise the controller of pre-set programs, and controller is electrically connected with scale removal button, after scale removal button is activated, and controlDevice control scale removal program processed carries out realizing scale removal process. Preferably, water pump is connected between scale remover box 2 and body of heater 1,So that the scale remover in scale remover box 2 is introduced in body of heater 1.
Below with reference to Fig. 1 and Fig. 2, the descaling method of the steam boiler 100 of a specific embodiment according to the present invention is briefly described.
Water pump is opened, and composite scale remover is sucked to body of heater 1, and when the soakage of scale remover arrives after certain value, water pump stops inhalingEnter scale remover, ultrasonic generator 3 starts subsequently, and now water intaking valve 12 and outlet valve 14 are all closed, the scale removal in body of heater 1Agent mixed solution can be under ultrasonic vibrations, vibrate, thereby strengthen incrustation scale and scale remover with together with the incrustation scale of body of heater 1 inwallContact area, now the air bleeding valve on body of heater 1 is also opened, and ultrasonic generator 3 is worked after certain hour, opens outlet valve 14,Waste liquid in body of heater 1 is discharged from the delivery port 13 of steam boiler 100 bottoms. After waste liquid is discharged, can be in body of heater 1Add neutralizer (for example trisodium phosphate solution) to soak body of heater 1, to prevent that steam boiler 100 from corroding, then by neutralizerDischarge.
Then, again open water pump, make water pump rinse body of heater 1 inwall to the clean clear water softening of the interior suction of body of heater 1,Repeatedly rinse several times, can wash remaining incrustation scale in body of heater 1 etc. Preferably, the scale remover of using can be family expenses foodsWith the solution of vinegar preparation, its aobvious faintly acid, can not cause very large corrosivity to body of heater 1, and can guarantee making of userBy safety.
According to the steam boiler 100 of the embodiment of the present invention, can realize a full-automatic key descaling function, greatly to have improved and to have removedConvenience and the security of dirt, make user can be easily, easily steam boiler 100 is carried out to scale removal. Particularly, originallyThe descalling technique of inventive embodiments adopts ultrasonic cleaning method, makes the incrustation scale of body of heater 1 inwall de-under ultrasonic concussion effectPowder falling is broken, and can strengthen the scrub area of scale remover to incrustation scale, than traditional mechanical cleaning, more can clean in body of heater 1Every nook and cranny is more can Rapid Cleaning clean for obstinate incrustation scale.
In addition, the scale remover of the embodiment of the present invention can be environmental protection domestic type formula, utilizes the vinegar of family expenses and Si-P crystal (poly-Other component such as phosphate and polysilicate) be re-dubbed scale remover, in the time that the scale remover of using is family expenses vinegar, due to foodBy the aobvious faintly acid of vinegar, can not cause very large corrosivity to body of heater 1, due to Si-P crystal, phosphorus pentoxide crystal is (as poly-phosphorusHydrochlorate and polysilicate) control release technic, can play scale effect, can prevent CaCO3Generation and enrichment,And can disperse the CaCO of fouling3Deng, composite scale remover has the double effects of scale removal and scale inhibition. In addition, scale remover also canTo select the liquid detergent etc. of family expenses. The scale removal formula of composite family expenses, the serviceability temperature of scale remover is controlled at 30 DEG C of-60 DEG C of left and right and isSuitable.
In sum, above-mentioned scale removal process is simple, quick, scale removal comprehensively, thoroughly, scale remover is simple and easy to get, safety and environmental protection,Large-scale small size steam boiler 100 is all suitable for, especially for example, for the small size steam boiler 100 (steaming in steam cleanerSteam boiler 100 in boiler furnace 100 or vapour iron), need not dismantle household electrical appliance, can clean sooner steam boiler 100Interior incrustation scale.
Below, describe according to the descaling method of the steam boiler 100 of the embodiment of the present invention.
According to the descaling method of the steam boiler 100 of the embodiment of the present invention, comprise the following steps.
Steps A: inject scale remover. Particularly, scale remover can inject automatically, for example, and in the above-described embodiments, whenStart after scale removal button, scale remover can automatically inject in body of heater 1 under the effect of water pump. Wherein, a little less than scale remover can beAcid or low acidic oxides, as, at least one in acetic acid, Si-P crystal, lemon acid and phosphorus pentoxide, is preferably houseWith acetic acid, thereby reach above-mentioned scale removal and scale inhibition double effects, wherein, acetic acid can be provided by vinegar, thereby is weak acidThe scale remover of property can protect steam boiler 100 inwalls to avoid it to be corroded, and makes scale remover safety and environmental protection, is conveniently easy to get,Descaling method is easy to realize.
Preferably, before steps A, can also comprise step e: the interior temperature of steam boiler 100 is cooled to predetermined temperature T1,For example, the scope of predetermined temperature T1 can be 30 DEG C≤T1≤60 DEG C. Thus, can effectively prevent weak acid volatilization, keep awayExempt to lose scale removal ability, for example, can set up temperature sensor, and to control temperature be 30 DEG C-60 DEG C, if higher than 60 DEG CJust stop heating, if lower than 30 DEG C of just heating.
Step B: open ultrasonic generator 3, the scale remover in above-mentioned body of heater 1 is vibrated together with incrustation scale, and strengthen incrustation scale withThe contact area of scale remover, make incrustation scale sooner, more fully come off, to improve descale effect.
Step C: the gas in steam boiler 100 is discharged, normal to guarantee the pressure in body of heater 1, make scale removal smoothCarry out. Preferably, the exhaust mode that the exhaust mode of steam boiler 100 can similar pressure cooker, when furnace pressure exceedes oneFixed atmospheric pressure value just can automatic vent, for example in the above-described embodiments described in, air bleeding valve can have preset pressure limiting value,And air bleeding valve is configured in the time that the pressure in body of heater 1 is greater than preset pressure limiting value and automatically opens, in brief, when body of heater 1In pressure exceed this preset pressure limiting value will be by automatic vent, thereby the pressure in body of heater 1 is maintained all the timeBelow preset pressure limiting value, thereby improve descale effect.
Alternatively, step C can be repeated multiple times, and at least one times before step B, at least one times after step B,That is to say, open ultrasonic before and open after ultrasonic and all at least arrange gas one time, thereby guarantee scale removal is carried out smoothly.Here, it should be noted that, in the whole process of carrying out in scale removal, preferably, steam boiler 100 is not a direct exhaust,But as described above, ability automatic vent in the time that the pressure in body of heater 1 exceedes preset pressure limiting value, thus can guarantee stoveIn body 1, there is pressure and maintain all the time below preset pressure limiting value, to accelerate scale removal efficiency, improving descale effect.
Step D: the interior liquid of exhaust steam boiler 100, that is to say, the waste liquid after interior body of heater 1 washing is discharged, concreteGround is said, can is that the incrustation scale and the scale remover that in steam boiler 100, come off in scale remover are discharged in the lump. Alternatively, in stepBefore rapid D, can also comprise step F: the interior insulation of steam boiler 100 scheduled time t1, that is to say, at exhaust steam boilerBefore waste liquid in 100, steam boiler 100 can also be incubated a period of time, thereby further improves descale effect. Enter oneStep alternatively, can also comprise step G: stop water inlet and water outlet in steam boiler 100, namely before step FSay, can first stop after the water inlet and water outlet of steam boiler 100, then carry out the insulation program of steam boiler 100, thereby carryHigh heat insulation effect.
In addition, after step D, can also comprise step H: (be for example difficult for to the interior injection tenderising soln of steam boiler 100The demineralized water of fouling etc.) time of repose T2, and discharge, that is to say, adopt less scaling demineralized water to steam boiler 100Soak and discharge again for a moment, realize the effect of cleaning, make steam boiler 100 totally available. Preferably, this step H optimumN time repeatedly, n >=1, that is to say, adopts less scaling demineralized water repeatedly to clean steam boiler 100, therebyCan effectively improve the clean level of steam boiler 100.
In addition, between step D and step H or in step H, can further include step I: to steam boiler 100Interior injection neutralizer, for example strong base weak acid salt cushioning liquid, as, in dihydrogen phosphate solution, sodium phosphate, disodium-hydrogenAt least one. That is to say, clean steam boiler 100 after with effluent discharge and with demineralized water before, can be to steamingThe neutralizer that the interior injection of boiler furnace 100 is antirust, or clean in the process of steam boiler 100, to steam boiler at demineralized waterThe antirust neutralizer of 100 interior injection, thus, can improve the problem that steam boiler 100 corrodes effectively.
Here, it should be noted that, some can exchange the execution sequence of above-mentioned steps, and for example step B (opens ultrasonicRaw device 3) and step G (stopping water inlet and water outlet in steam boiler 100) can sequentially carry out or carry out simultaneously, alsoBe to say, can first carry out step B and carry out again step G, or first carry out step G and carry out again step B, or carry out simultaneouslyStep B and step G. Thus, can realize carrying out flexibly of scale removal, improve pointedly descale effect. In addition, stepB (opening ultrasonic generator 3) and step C (gas in steam boiler 100 is discharged) also can sequentially carry out or the whileCarry out. That is to say, can first carry out step B and carry out again step C, or first carry out step C and carry out again step B, orPerson carries out step B and step C simultaneously. Thus, can realize carrying out flexibly of scale removal, improve pointedly descale effect.
According to the descaling method of the steam boiler 100 of the embodiment of the present invention, adopt ultrasonic cleaning method, make in body of heater 1The pulverizing that comes off under ultrasonic concussion effect of the incrustation scale of wall, and can strengthen the scrub area of scale remover to incrustation scale, and ultrasonicIn concussion process, also promote that the incrustation scale that dissolves cracking comes off, increase scale removal response area, than traditional mechanical cleaning, more canClean to the every nook and cranny in body of heater 1, more can Rapid Cleaning clean for obstinate incrustation scale, in addition, scale remover can be ringGuarantor's domestic type formula, uses safety, easily obtain, and corrosivity is little, and can plays scale removal, scale inhibition and prevent steamTriple beneficial effects that boiler 100 corrodes, in brief, above-mentioned descaling method is simple, quick, scale removal comprehensively, thoroughly, removeDirt agent is simple and easy to get, and safety and environmental protection is applied widely.
In description of the invention, it will be appreciated that, term " on ", D score, " top ", " end ", " interior ",Orientation or the position relationship of instructions such as " outward " are based on orientation shown in the drawings or position relationship, are only for convenience of description originallyInvention and simplified characterization, instead of instruction or hint indication device or element must there is specific orientation, with specific sidePosition structure and operation, therefore can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score canBe that the first and second features directly contact, or the first and second features are by intermediary mediate contact. And, First CharacteristicSecond Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, orOnly represent that First Characteristic level height is higher than Second Characteristic. First Characteristic Second Characteristic " under ", " below " and " underFace " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than secondFeature.
In the description of this description, reference term " embodiment ", " some embodiment ", " example ", " toolBody example " or the description of " some examples " etc. mean specific features, structure, the material described in conjunction with this embodiment or exampleMaterial or feature are contained at least one embodiment of the present invention or example. In this manual, the signal to above-mentioned termProperty statement not must for be identical embodiment or example. And, specific features, structure, material or the spy of descriptionPoint can one or more embodiment in office or example in suitable mode combination. In addition, not conflicting in the situation that,Those skilled in the art can be by the spy of the different embodiment that describe in this description or example and different embodiment or exampleLevy and carry out combination and combination.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: do not departing fromIn the situation of principle of the present invention and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, thisBright scope is limited by claim and equivalent thereof.
Claims (12)
1. a descaling method for steam boiler, is characterized in that, in described steam boiler, ultrasonic generator is set, described removingDirt method comprises the following steps:
A, injection scale remover;
B, open described ultrasonic generator;
C, described steam copper furnace gas is discharged;
Liquid in D, exhaust steam boiler.
2. the descaling method of steam boiler according to claim 1, is characterized in that, before steps A, also comprise withLower step:
E: in steam boiler, temperature is cooled to 30 DEG C-60 DEG C.
3. the descaling method of steam boiler according to claim 1, is characterized in that, before step D, also comprise withLower step:
F: insulation scheduled time t1 in described steam boiler.
4. the descaling method of steam boiler according to claim 3, is characterized in that, before described step F, and also bagDraw together following steps:
G: stop water inlet and water outlet in steam boiler.
5. the descaling method of steam boiler according to claim 4, is characterized in that, described step B and described stepG order is carried out or is carried out simultaneously.
6. the descaling method of steam boiler according to claim 1, is characterized in that, described step B and step COrder is carried out or is carried out simultaneously.
7. the descaling method of steam boiler according to claim 6, is characterized in that, described step C is repeated multiple times,And at least one times before step B, at least one times after step B.
8. according to the descaling method of the steam boiler described in any one in claim 1-7, it is characterized in that described step DAfter, further comprising the steps of:
H, in described steam boiler, inject tenderising soln time of repose T2, and discharge described step H n time repeatedly, n≥1。
9. the descaling method of steam boiler according to claim 8, is characterized in that, described step D step H itBetween or in described step H, also further comprise:
I: inject antirust neutralizer in described steam boiler.
10. the descaling method of steam boiler according to claim 9, is characterized in that, described neutralizer is a little less than highly basicBarbiturates cushioning liquid.
The descaling method of 11. steam boilers according to claim 1, is characterized in that, described scale remover be weak acid,Or low acidic oxides.
The descaling method of 12. steam boilers according to claim 11, is characterized in that, described scale remover is acetic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510967926.2A CN105605964A (en) | 2015-12-18 | 2015-12-18 | Descaling method for steam boiler |
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| CN201510967926.2A CN105605964A (en) | 2015-12-18 | 2015-12-18 | Descaling method for steam boiler |
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| CN105605964A true CN105605964A (en) | 2016-05-25 |
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| CN201510967926.2A Pending CN105605964A (en) | 2015-12-18 | 2015-12-18 | Descaling method for steam boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025211A (en) * | 2018-01-12 | 2019-07-19 | 宁波方太厨具有限公司 | A kind of electricity steam box apparatus for eliminating sludge and its descaling method |
| CN110455118A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | The method for sampling cooler scale removal |
| CN110595260A (en) * | 2019-10-08 | 2019-12-20 | 广东石油化工学院 | On-line cleaning method for dirt of shell-and-tube heat exchanger |
| CN111486136A (en) * | 2019-12-21 | 2020-08-04 | 合肥皖化电泵有限公司 | Resistance reducing method for inner wall of furnace water pump |
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| US4320528A (en) * | 1980-01-23 | 1982-03-16 | Anco Engineers, Inc. | Ultrasonic cleaner |
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| CN110025211A (en) * | 2018-01-12 | 2019-07-19 | 宁波方太厨具有限公司 | A kind of electricity steam box apparatus for eliminating sludge and its descaling method |
| CN110025211B (en) * | 2018-01-12 | 2024-04-16 | 宁波方太厨具有限公司 | Descaling device and descaling method for electric steam box |
| CN110455118A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | The method for sampling cooler scale removal |
| CN110595260A (en) * | 2019-10-08 | 2019-12-20 | 广东石油化工学院 | On-line cleaning method for dirt of shell-and-tube heat exchanger |
| CN111486136A (en) * | 2019-12-21 | 2020-08-04 | 合肥皖化电泵有限公司 | Resistance reducing method for inner wall of furnace water pump |
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Application publication date: 20160525 |
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