CN105502695B - A kind of scale cleaning agent and its application method - Google Patents
A kind of scale cleaning agent and its application method Download PDFInfo
- Publication number
- CN105502695B CN105502695B CN201510917905.XA CN201510917905A CN105502695B CN 105502695 B CN105502695 B CN 105502695B CN 201510917905 A CN201510917905 A CN 201510917905A CN 105502695 B CN105502695 B CN 105502695B
- Authority
- CN
- China
- Prior art keywords
- water
- cleaning agent
- scale cleaning
- scale
- boiler
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The invention discloses a kind of scale cleaning agent, by weight including following components：50 70 parts of sodium carbonate；20 25 parts of sodium pyrophosphate；45 60 parts of tannin extract；15 30 parts of sodium sulphate；8 16 parts of tertiary sodium phosphate；38 parts of sodium gluconate；7 12 parts of starch.The advantageous effect of the scale cleaning agent of the present invention is, improves descaling and antiscaling effect, avoids secondary fouling, environmentally protective, nontoxic, tasteless, energy-efficient.
Description
Technical field
The present invention relates to chemical field, more particularly to a kind of scale cleaning agent and its application method.
Background technology
Boiler is very universal in China as traditional heat supply in winter equipment.Existing boiler feedwater processing is unqualified, right
Boiler has very big corrosion, and boiler inner wall heating surface can be made to form hard incrustation scale.
The heating equipments such as boiler generation incrustation scale is because containing a certain amount of calcium and magnesium ion and other huge sum of moneys in boiler feedwater
Belong to ion, during operation, calcium, magnesium plasmon absorption heat can be chemically reacted with the carbon dioxide being dissolved in water, and be generated
Indissoluble substance is precipitated.And water is heated in stove generates vapor, and calcium, the concentration of magnesium carbonate are higher and higher in stove water, and
And the solubility of certain calcium, magnesium salts is reduced with the raising of coolant-temperature gage, when reaching a certain concentration, will be separated from the water out
To form solid precipitation.These solids precipitation can be attached on boiler inner surface, heat is hindered to pass as the increase of thickness becomes
The incrustation scale passed.It removes outside above-mentioned carbonate, incrustation scale further includes calcium sulfate, calcium silicates, magnesium silicate, iron oxide and ferroso-ferric oxide
Deng, what various component proportions were not to determine, the property of incrustation scale has larger difference as its component is different.Sulfuric acid
Salt incrustation scale mainly appears on the higher heating surface of boiler heat load, and color is yellow-white, and key component is calcium sulfate, two hydrations
Calcium sulfate and two calcium sulfate of hydration, this incrustation scale are hard and fine and close.
The thermal conductivity of incrustation scale is very poor, and thermal conductivity factor is the 1/50~1/30 of steel.After incrustation scale is attached on heating surface, heat
Amount transmits difficulty, and the heat that fuel generates cannot pass to boiler water well, and boiler water is made to absorb heat and is reduced, amount of heat
It is taken away by flue gas, causes heat waste.In order to which boiler is made to reach its nominal parameter when working, then when needing addition than normal work
For more fuel, so as to cause waste of fuel.According to experiment, 1mm thickness incrustation scales are generated on boiler wall, it can more consumption 5%~8%
Fuel, boiler efficiency reduce by 1%~2%.In addition, incrustation scale prevents the energy that heating surface absorbs to be led from being passed to stove water in time
The heating surface operating temperature of fouling is caused to increase, when temperature has been more than the temperature that steel can bear, metal strength will be notable
It reduces, metal superheat is caused to deform, easily makes boiler plate bulge or explosion.If incrustation scale cannot be removed in time, boiler wall can be made
It is destroyed, shortens boiler service life.
Existing scale removal scheme has two kinds of pickling and alkali cleaning, and pickling descaling is quick, but blowing out is needed to operate, and acid
It is great damage, seriously corroded to wash to steel equipment, reduces the service life of boiler and equipment.General alkali cleaning scheme has
Method of Soda, one glue method of trisodium (tertiary sodium phosphate, sodium carbonate, sodium hydroxide and tannin extract) and four sodium method (tertiary sodium phosphate, sodium carbonate, hydrogen
Sodium oxide molybdena and sodium humate).It is time-consuming longer but when carrying out scale removal using above-mentioned alkalinity, and effect is unsatisfactory.It is no matter sour
It washes or alkali cleaning, incrustation scale is detached from slabbing, this dirt piece plugging phenomenon is serious, and existing scale removal way also has first pickling alkali cleaning again
Method, but such way not only steel are caused it is more serious deteriorate, damage service life of equipment, and traditional alkali antiscale
Agent also there are problems that in use secondary fouling (be dissolved in calcium and magnesium plasma in recirculated water can with temperature-time with
And the loss of steam, in the incrustation scale that boiler and pipe surface formation are poorly soluble).
During heating, since the recirculated water in radiator is more clean, but there are the heat in resident's releasing heating
The phenomenon that water is diverted to other purpose, and what is covered when boiler and pipe-line system depletion is cold water, cold water is heated operation by handy fuel,
One winter must waste a large amount of fuel.
In view of this, it is special to propose the present invention.
Invention content
The technical problem to be solved in the present invention is to overcome the deficiencies of the prior art and provide a kind of scale cleaning agent and its make
With method, there is anticorrosion, demineralized water, scale removal is rapid, thoroughly incrustation scale is prevented to grow the effect with being formed, nontoxic, tasteless, valency
Lattice are cheap, suitable for any different quality.
In order to achieve the above objectives, the present inventor carries out test of many times research on the basis of the composition of traditional one glue of trisodium,
Ideal promotion degree is not achieved in effect after carrying out repeatedly proportioning change, is found between once accidentally, in improved formula
The sodium gluconate and starch of special ratios are added in, obtains preferable descaling and antiscaling effect.
It is of the invention to be using the basic conception of technical solution：
A kind of scale cleaning agent, by weight including following components：
By test of many times, present inventors have surprisingly found that, in mentioned component sulfonated humic acid is added in following ratios
More effect is obtained after sodium and calgon, under the synergistic effect of each ingredient, sodium gluconate, starch and tannin extract are to gold
The chelation for belonging to ion significantly increases, and the medicament of the present invention, rich in more polymerization of olefin using catalyst bodies, the precipitation of calcium and magnesium will not reach in water
Saturation is dissolved to it and precipitation is precipitated；With molecular surface active dispersal performance and suction-operated, calcium carbonate etc. can be attached to
Dirty slag ingredient surface hinders and disperses the expansion of scale crystal, and incrustation scale is made to be precipitated as indefiniteness, is easy to discharge, improves and follow
The suspension effect of ring water, the phenomenon that hindering secondary fouling, occur.
Above-mentioned scale cleaning agent further includes：
20-30 parts of sulfonated humic acid sodium；
5-10 parts of calgon.
Above-mentioned scale cleaning agent, by weight including following components：
Above-mentioned scale cleaning agent, the tannin extract are valonex.
Above-mentioned scale cleaning agent, the starch are pre-gelatinized starch.
It is studied by inventor, above-mentioned scale cleaning agent is by the following method using acquisition more preferably effect, user
Method includes：
A, by scale cleaning agent and water according to mass ratio 1：It is for use that the ratio of 0.5-1.2 is configured to concentrate；
B, concentrate obtained in a is added in the equipment of to be cleaned/antiscale；
PH value when c, monitoring equipment normal operation in b inside equipment, by way of adding the concentrate or water
The pH value is made to be maintained at appropriate numerical value；
The appropriate numerical value is 11-12 in scale removal, is 9-10 in antiscale.
The application method of above-mentioned scale cleaning agent, the water that the water in the step a is 4-10 DEG C.
In the above-mentioned technical solutions, valonex is produced using Hebei province Qinhuangdao sansan tannin extract Co., Ltd
's.
The pre-gelatinized starch is the PS-2663 series produced to Guangxi State Farms Mingyang Biochemical Group, Inc.
Cassava modified starch carries out the pre-gelatinized starch that pre-gelatinized is handled.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：
1st, under the synergistic effect of the sodium gluconate of special ratios, starch and other compositions, chelation significantly increases
By force, the organic molecule cohesion metal salt being dispersed in recirculated water, hinders it to be attached on tube wall or furnace wall, therefore turbidity of circulating water
It is higher, enter water and become dark brown, can play the role of preventing artificially to discharge water；
2nd, it is environmentally protective, nontoxic, tasteless, fuel is efficiently saved, power consumption is reduced, reduces dust emission, reduces atmosphere
Pollution, has been really achieved the environment protecting of energy-saving and emission-reduction；
3rd, pipe, not plugging, protection of boiler during shutdown period tube wall, deoxygenation anticorrosion are not hindered in basic agent operation of the present invention.Boiler is no longer
Booster, because have in pipe incrustation scale blocking caused by booster so blowing out go overhaul change pipe (only this expense can save every year 1000000 yuan with
On)；
4th, the medicament of the invention can save capital expenditure, examine equipment, assay apparatus and operator compared with other medicaments
Member, can not use cation exchange softened water equipment, without any chemical agent is added again, also eliminate cumbersome point
Analyse chemical examination technique；
5th, detergent power is strong, significant effect, solves the problems, such as pickling wound erosion equipment；
6th, the recirculated water for adding in medicament of the present invention is lubricated as the shower cream of bathing, and water flow velocity is accelerated, and resistance is big
Big to reduce, water pump, motor are significantly laborsaving, hence it is evident that reduce power consumption.
The scale cleaning agent of the present invention is suitable for hot-water boiler, steam boiler, cogeneration of heat and power, primary net direct-furnish, secondary network
Heat exchange station converting system；The particularly higher water quality of high rigidity, high alkalinity, calcium and magnesium salt ion.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the invention will be further described, to help present disclosure is understood.
Embodiment 1
Scale cleaning agent is prepared according to the weight ratio of following component：
Embodiment 2
Scale cleaning agent is prepared according to the weight ratio of following component：
Embodiment 3
Scale cleaning agent is prepared according to the weight ratio of following component：
Embodiment 4
Scale cleaning agent is prepared according to the weight ratio of following component：
Embodiment 5
Scale cleaning agent is prepared according to the weight ratio of following component：
Embodiment 6
Scale cleaning agent is prepared according to the weight ratio of following component：
Embodiment 7
Scale cleaning agent is prepared according to the weight ratio of following component：
Control group 1
The pulvis of control group 1 is prepared according to the parts by weight ratio of following component：
Control group 2
The pulvis of control group 2 is prepared according to the parts by weight ratio of following component：
Blank group
Blank group control is sodium carbonate pulvis.
In above-described embodiment 1-7, the tannin extract is valonex, limited using Hebei province Qinhuangdao sansan tannin extract
Company's production.The starch is the wood of PS-2663 series produced to Guangxi State Farms Mingyang Biochemical Group, Inc.
Potato converted starch carries out the pre-gelatinized starch that pre-gelatinized is handled.
Experimental example 1
Heating boiler sample similar in choosing 10 scaling degrees that same batch produces and uses is experimental subjects；(at this
It is more serious mixed type incrustation scale in experimental example, scale forming reaches 5mm) choose the scale cleaning agent of above-described embodiment 1-7
Powder, control group 1 and 2 pulvis of control group and blank group pulvis, and with reference to this specification record descaling method by above-mentioned 10 kinds
The above-mentioned 10 boiler samples of pulvis difference heap carry out scale removal experiment；Its specific scale removal method is as follows：
A, by laboratory sample (corresponding one kind in embodiment 1-7, control group 1 or 2, blank group) and water according to mass ratio 1：
It is for use that the ratio of 0.5-1.2 is configured to concentrate；
B, concentrate addition obtained in a is treated in heating boiler；
C, start above-mentioned heating boiler, boiler is made to be in normal operating conditions；The pH value of boiler internal water, by adding
Stating the mode of concentrate or water makes the pH value keep 11-12；
D, it is with pressure operation 8 days after, take and each clean the boiler effect be compared, as a result referring to table one.
In above-mentioned steps a, water is 4-10 DEG C of water.In step c, when the pH for monitoring boiler internal water is less than 11,
The concentrate in step a is added into heating boiler；When the pH for monitoring boiler internal water is higher than 12, add into heating boiler
Add water.
Table one
By result above, in terms of scale removal, embodiment 1-7 scale removal effect can reach more than 91%, especially embodiment
4-7 can even more remove more than 95% incrustation scale；Better than traditional one glue method of trisodium and four sodium methods (control group 1 and control group 2)
Descaling rate (be respectively 75% and 81%)；Even more better than the scale removal effect for only using sodium carbonate.
For in terms of dirty slag, the dirty slag particle diameter of embodiment 1-7 is loose no more than 3.2mm, and more, is more conducively recycled with water
Discharge, will not generate blocking.And have sheet incrustation scale in control group 1,2 and blank group, it is easier to cause to block up in cyclic process
Plug, incrustation scale, which blocks pipeline, increases the pressure in boiler, it is easy to the danger of booster occur.
In existing heating process, there is an artificial recirculated water behavior used for other purposes released and flow through heating, the cycle in heating
After water is released, what when boiler and pipe-line system depletion covered is cold water, needs to expend a large amount of fuel promotion cold water temperature, whole
Therefore a winter needs the water rates consumed, the electricity charge, fuel cost very important more.For the aspect that artificially discharges water, control group 1 follows
Ring water color is Sandy, and turbidity is slightly lower, it is difficult to play the role of preventing artificially discharging water, someone, which can release, to be flowed through this of heating and follow
Ring water；Recirculated water color is muddy for dark brown or deeper and recirculated water in embodiment 1-3 and embodiment 4-7, and the hot water of releasing is basic
It does not act on, has prevented the behavior used for other purposes that artificially discharges water substantially.
Experimental example 2
Heating boiler sample similar in choosing 10 scaling degrees that same batch produces and uses is experimental subjects；(at this
For mild hybrid incrustation scale in experimental example, scale forming reaches 1mm or so) choose the scale cleaning agent powder of above-described embodiment 1-7
End, control group 1 and 2 pulvis of control group and blank group pulvis, and the descaling method recorded with reference to this specification is by above-mentioned 10 kinds of powder
Agent carries out scale removal experiment to above-mentioned 10 boiler samples respectively；Its specific antiscale occupation mode is as follows：
A, by laboratory sample (corresponding one kind in embodiment 1-7, control group 1 or 2, blank group) and water according to mass ratio 1：
It is for use that the ratio of 0.5-1.2 is configured to concentrate；
B, concentrate addition obtained in a is treated in heating boiler；
C, start above-mentioned heating boiler, boiler is made to be in normal operating conditions；The pH value of boiler internal water, by adding
Stating the mode of concentrate or water makes the pH value keep 9-10；
D, it is with pressure operation 45 days after, take and each boiler compounds effect be compared, as a result referring to table two.
In above-mentioned steps a, water is 4-10 DEG C of water.In step c, when the pH for monitoring boiler internal water is less than 9, to
The concentrate in step a is added in heating boiler；When the pH for monitoring boiler internal water is higher than 10, added into heating boiler
Water.
Table two
In experimental example 2, the chelation enhancing of the metal ions such as calcium and magnesium, recirculated water are used as having a bath in embodiment 1-7
Shower cream equally lubricate, stove inner wall raw water dirt disappear, formed taupe educate film, non-metallic ion adheres to encrustation again
Situation；And control group 1,2 and the inner wall of blank group have new incrustation scale scale formation.And the recirculated water in embodiment 1-7 exists
Under the synergistic effect of the sodium gluconates of special ratios, starch and other compositions, chelation is remarkably reinforced, and is dispersed in cycle
Organic molecule cohesion metal salt in water, hinders it to be attached on tube wall or furnace wall, therefore turbidity of circulating water is higher, band face
Color, can play the role of preventing artificially discharging water (turbidity of circulating water is high, there is sliding sense, put come also substantially useless)；And control group 1,2 and
The turbidity of circulating water of blank group is relatively low, and situation about artificially discharging water still has presence.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of scale cleaning agent, which is characterized in that by weight including following components：
2. scale cleaning agent according to claim 1, which is characterized in that further include by weight
20-30 parts of sulfonated humic acid sodium；
5-10 parts of calgon.
3. scale cleaning agent according to claim 2, which is characterized in that by weight including following components：
4. scale cleaning agent according to claim 1, which is characterized in that the tannin extract is valonex.
5. scale cleaning agent according to claim 2, which is characterized in that the starch is pre-gelatinized starch.
6. a kind of application method of scale cleaning agent as described in claim 1-5 is any, which is characterized in that including：
A, by scale cleaning agent and water according to mass ratio 1：It is for use that the ratio of 0.5-1.2 is configured to concentrate；
B, concentrate obtained in a is added in the equipment of to be cleaned/antiscale；
PH value when c, monitoring equipment normal operation in b inside equipment, makes institute by way of adding the concentrate or water
It states pH value and is maintained at appropriate numerical value；
The appropriate numerical value is 11-12 in scale removal, is 9-10 in antiscale.
7. the application method of scale cleaning agent according to claim 6, which is characterized in that the water in the step a is 4-
10 DEG C of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510917905.XA CN105502695B (en) | 2015-12-11 | 2015-12-11 | A kind of scale cleaning agent and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510917905.XA CN105502695B (en) | 2015-12-11 | 2015-12-11 | A kind of scale cleaning agent and its application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105502695A CN105502695A (en) | 2016-04-20 |
| CN105502695B true CN105502695B (en) | 2018-06-15 |
Family
ID=55711080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510917905.XA Expired - Fee Related CN105502695B (en) | 2015-12-11 | 2015-12-11 | A kind of scale cleaning agent and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105502695B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106283081A (en) * | 2016-08-15 | 2017-01-04 | 山东大斯夫新材料有限公司 | Circulation metal surface supermolecule cleans prefilming agent and using method |
| CN111003819A (en) * | 2019-12-20 | 2020-04-14 | 国家能源集团煤焦化有限责任公司 | Descaling agent composition, descaling method and application |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066432A (en) * | 1991-05-07 | 1992-11-25 | 朱朝木 | Scale removal, scale inhibitor prescription and production method |
| CN1349940A (en) * | 2001-11-21 | 2002-05-22 | 穆青春 | Boiler scale preventing and eliminating agent |
| CN1666963A (en) * | 2004-03-09 | 2005-09-14 | 翟春生 | Antiscale scale-remover for industrial water treatment |
| CN101016422A (en) * | 2006-02-10 | 2007-08-15 | 任桂民 | Spot proof and removing agent for middle and low pressure boiler |
| CN101580310A (en) * | 2009-06-22 | 2009-11-18 | 谢云漫 | Food grade electric kettle scale dissolver and preparation method thereof |
| CN101928073A (en) * | 2010-08-30 | 2010-12-29 | 山东天地人锅炉制造安装有限公司 | Descaling preservative for boilers |
| CN102020362A (en) * | 2009-09-22 | 2011-04-20 | 刘文军 | Detergent |
| CN104761065A (en) * | 2015-04-24 | 2015-07-08 | 张萍 | Descaling agent |
| CN105000684A (en) * | 2015-07-27 | 2015-10-28 | 南京巨鲨显示科技有限公司 | Scale removing agent and preparation method thereof |
| CN105036205A (en) * | 2015-06-25 | 2015-11-11 | 庄秋荣 | Solid agentia for boiler water treatment and preparation method thereof |
-
2015
- 2015-12-11 CN CN201510917905.XA patent/CN105502695B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066432A (en) * | 1991-05-07 | 1992-11-25 | 朱朝木 | Scale removal, scale inhibitor prescription and production method |
| CN1349940A (en) * | 2001-11-21 | 2002-05-22 | 穆青春 | Boiler scale preventing and eliminating agent |
| CN1666963A (en) * | 2004-03-09 | 2005-09-14 | 翟春生 | Antiscale scale-remover for industrial water treatment |
| CN101016422A (en) * | 2006-02-10 | 2007-08-15 | 任桂民 | Spot proof and removing agent for middle and low pressure boiler |
| CN101580310A (en) * | 2009-06-22 | 2009-11-18 | 谢云漫 | Food grade electric kettle scale dissolver and preparation method thereof |
| CN102020362A (en) * | 2009-09-22 | 2011-04-20 | 刘文军 | Detergent |
| CN101928073A (en) * | 2010-08-30 | 2010-12-29 | 山东天地人锅炉制造安装有限公司 | Descaling preservative for boilers |
| CN104761065A (en) * | 2015-04-24 | 2015-07-08 | 张萍 | Descaling agent |
| CN105036205A (en) * | 2015-06-25 | 2015-11-11 | 庄秋荣 | Solid agentia for boiler water treatment and preparation method thereof |
| CN105000684A (en) * | 2015-07-27 | 2015-10-28 | 南京巨鲨显示科技有限公司 | Scale removing agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105502695A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103409763B (en) | A kind of clean-out system composition and clean-out system and application thereof | |
| CN103510097B (en) | Condenser low corrosion high cleanliness chemical cleaning method | |
| CN104277932A (en) | Scale cleaning agent and preparation method thereof | |
| CN107674778B (en) | Chemical cleaning agent for removing hard scale of air preheater and preparation method thereof | |
| CN101817598B (en) | Scale-removing cleaning solution for thermal pipeline and preparation method thereof | |
| CN103508568B (en) | A kind of boiler scale dispersion agent | |
| CN102312244B (en) | Thermal equipment operation cleaning agent and its application | |
| CN111441058A (en) | Descaling rust-removing corrosion-inhibition prefilming agent and preparation method and application thereof | |
| CN105502695B (en) | A kind of scale cleaning agent and its application method | |
| CN103882457A (en) | Stainless steel chemical cleaning agent | |
| CN101274803A (en) | Softener for station boiler sediment incrustation and two-stage incrustation-removing method | |
| CN101580311B (en) | Polymaleic acid boiler scale-inhibition corrosion inhibitor | |
| CN102002721B (en) | Cleaning agent for cleaning gas/gas heat exchanger of wet desulphurization system and preparing and using method thereof | |
| CN102674572A (en) | Scale preventing and removing agent and production process thereof | |
| CN106809967A (en) | A kind of contaminant release agent | |
| CN101269887A (en) | Scale corrosion inhibitor for poly-maleic anhydride boiler | |
| CN110512216B (en) | Liquid medicine for online cleaning of coke dry quenching condenser, preparation method and online cleaning method | |
| CN104140162A (en) | Non-phosphorus scale and corrosion inhibitor employing seawater as circulating cooling water, and preparation method thereof | |
| CN103553218A (en) | Composite corrosion inhibitor | |
| CN106554096A (en) | A kind of boiler environment-friendly type inhibition anti-sludging agent and preparation method thereof | |
| CN203474543U (en) | Device for reducing hardness of circulating water | |
| CN104478104A (en) | Phosphorus-free solid scale inhibitor and using method thereof | |
| CN103641246A (en) | Environment-friendly type boiler scale remover and preparation method thereof | |
| CN106989633A (en) | A kind of cleaning method of raw gas heat exchange heat exchanger used | |
| CN105016489B (en) | A kind of composition, its preparation method and its application method for water system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180615 Termination date: 20211211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |