CN110818103A - Low-pressure boiler scale and corrosion inhibitor and preparation method thereof - Google Patents
Low-pressure boiler scale and corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN110818103A CN110818103A CN201911142813.3A CN201911142813A CN110818103A CN 110818103 A CN110818103 A CN 110818103A CN 201911142813 A CN201911142813 A CN 201911142813A CN 110818103 A CN110818103 A CN 110818103A
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- 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
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
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- 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
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/105—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a scale and corrosion inhibitor for low-pressure boilers and a preparation method thereof, wherein the scale and corrosion inhibitor comprises the following raw materials in parts by weight: 10-15 parts of amino trimethylene phosphonic acid, 10-15 parts of hydrolyzed polymaleic anhydride, 0.5-1.5 parts of sodium tungstate, 7-8 parts of potassium hydroxide, 3-3.5 parts of sodium pyrophosphate, 10-15 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 30-35 parts of ethylenediamine tetramethylene phosphonic acid and 15-25 parts of deionized water as the balance, and relates to the technical field of low-pressure boilers. The scale and corrosion inhibitor suitable for the low-pressure boiler and the preparation method thereof can be finally obtained by researching and designing the characteristics of the low-pressure boiler, have excellent application effect and production value, create indispensable guarantee for energy conservation and emission reduction of enterprises, effectively reduce energy consumption, prolong the service life of equipment, can be applied to scale and corrosion inhibition of a low-pressure boiler device, and can effectively prevent the scaling phenomenon of the low-pressure boiler and slow down the corrosion of water bodies to the equipment.
Description
Technical Field
The invention relates to the technical field of low-pressure boilers, in particular to a scale and corrosion inhibitor for a low-pressure boiler and a preparation method thereof.
Background
The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy.
The original meaning of a boiler refers to a water container heated on fire, the boiler refers to a fuel burning place, the boiler comprises a boiler and a boiler, hot water or steam generated in the boiler can directly provide heat energy required by industrial production and people life, can be converted into mechanical energy through a steam power device, or can be converted into electric energy through a generator, the boiler providing hot water is called a hot water boiler and is mainly used for life, a small amount of application is also realized in industrial production, the boiler generating steam is called a steam boiler and is often called a boiler for short, and is mainly used for thermal power stations, ships, locomotives and industrial and mining enterprises, at present, in the boiler combustion furnace, due to long-time combustion, gas and the inner wall of the boiler react to corrode the inner wall of the boiler, and long-time use can cause scale inhibition on the inner wall of the boiler and is not beneficial to the use of the boiler, the boiler consists of the boiler and the water container on the boiler is the boiler, the boiler is an energy converter, which is a device for heating working medium water or other fluids to certain parameters by using heat energy released by fuel combustion or other heat energy, the boiler is divided into a boiler and a furnace, the boiler is a pressure part for containing water and steam and heating, vaporizing and separating water from steam, the furnace is a place for fuel combustion or other heat energy release, and is provided with a combustion device, a combustion chamber, a heat release flue and the like, the boiler and the furnace perform a heat conversion process, a heat release interface and a heat absorption interface are called heating surfaces, the boiler heats water into steam, and the boiler is provided with auxiliary devices such as a framework, a platform, an escalator, combustion, slag discharge, a smoke duct, a pipeline, a furnace wall and the like.
The pressure classification of the general boilers mainly comprises an atmospheric pressure boiler (a non-pressure boiler, namely a boiler working under normal atmospheric pressure), a low pressure boiler (the pressure is less than or equal to 2.5MPa), a medium pressure boiler (the pressure is less than or equal to 3.9MPa), a high pressure boiler (the pressure is less than or equal to 10.0MPa), an ultrahigh pressure boiler (the pressure is less than or equal to 14.0MPa), a subcritical boiler (the pressure is between 17 and 18MPa) and a supercritical boiler (the pressure is between 22 and 25 MPa).
The scale and corrosion inhibitor suitable for the low-pressure boiler is finally obtained by researching and designing the characteristics of the low-pressure boiler, has excellent application effect and production value, and creates indispensable guarantee for energy conservation and emission reduction of enterprises.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a low-pressure boiler scale and corrosion inhibitor and a preparation method thereof, which can effectively reduce energy consumption and prolong the service life of equipment.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a scale and corrosion inhibitor for low-pressure boilers comprises the following raw materials in parts by weight: 10-15 parts of amino trimethylene phosphonic acid, 10-15 parts of hydrolyzed polymaleic anhydride, 0.5-1.5 parts of sodium tungstate, 7-8 parts of potassium hydroxide, 3-3.5 parts of sodium pyrophosphate, 10-15 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 30-35 parts of ethylenediamine tetramethylene phosphonic acid and 15-25 parts of deionized water as the rest.
Preferably, the components in parts by weight comprise: 10 parts of amino trimethylene phosphonic acid, 10 parts of hydrolyzed polymaleic anhydride, 1 part of sodium tungstate, 7.5 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 10 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 35 parts of ethylenediamine tetramethylene phosphonic acid and 23 parts of deionized water.
Preferably, the components in parts by weight comprise: 15 parts of amino trimethylene phosphonic acid, 10 parts of hydrolyzed polymaleic anhydride, 1.5 parts of sodium tungstate, 7 parts of potassium hydroxide, 3 parts of sodium pyrophosphate, 15 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 30 parts of ethylene diamine tetramethylene phosphonic acid and 15 parts of deionized water.
Preferably, the components in parts by weight comprise: 12 parts of amino trimethylene phosphonic acid, 15 parts of hydrolyzed polymaleic anhydride, 0.5 part of sodium tungstate, 8 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 13 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 33 parts of ethylenediamine tetramethylene phosphonic acid and 15 parts of deionized water.
Preferably, the components in parts by weight comprise: 11 parts of amino trimethylene phosphonic acid, 15 parts of hydrolyzed polymaleic anhydride, 0.5 part of sodium tungstate, 8 parts of potassium hydroxide, 3 parts of sodium pyrophosphate, 11 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 32 parts of ethylene diamine tetramethylene phosphonic acid and 19 parts of deionized water.
Preferably, the components in parts by weight comprise: 13 parts of amino trimethylene phosphonic acid, 13 parts of hydrolyzed polymaleic anhydride, 1.5 parts of sodium tungstate, 7 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 12 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 31 parts of ethylenediamine tetramethylene phosphonic acid and 19 parts of deionized water.
The invention also discloses a preparation method of the low-pressure boiler scale and corrosion inhibitor, which comprises the following steps:
s1, adding deionized water into the reaction kettle, and starting stirring;
s2, adding potassium hydroxide into the reaction kettle;
s3, adding sodium tungstate into the reaction kettle;
s4, sequentially adding sodium pyrophosphate, diethylenetriamine pentamethylene methylene phosphonic acid, aminotrimethylene phosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the product.
Preferably, the temperature is controlled to be 40-50 ℃ throughout the steps S1-S4.
(III) advantageous effects
The invention provides a scale and corrosion inhibitor for a low-pressure boiler. Compared with the prior art, the method has the following beneficial effects:
(1) the scale and corrosion inhibitor for the low-pressure boiler and the preparation method thereof comprise the following raw materials in parts by weight: 10-15 parts of amino trimethylene phosphonic acid, 10-15 parts of hydrolyzed polymaleic anhydride, 0.5-1.5 parts of sodium tungstate, 7-8 parts of potassium hydroxide, 3-3.5 parts of sodium pyrophosphate, 10-15 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 30-35 parts of ethylenediamine tetramethylene phosphonic acid and 15-25 parts of deionized water as the rest, the scale and corrosion inhibitor suitable for the low-pressure boiler, which is finally obtained by researching and designing the characteristics of the low-pressure boiler, has excellent application effect and production value, creates indispensable guarantee for energy conservation and emission reduction of enterprises, can effectively reduce energy consumption, prolong the service life of equipment, can be applied to scale and corrosion inhibition of a low-pressure boiler device, can effectively prevent the scaling phenomenon of the low-pressure boiler, slow down the corrosion of water to the equipment, wherein the scale inhibition rate is more than 90 percent, and the carbon steel corrosion rate is less than or equal to 0.075 mm/a.
(2) The low-pressure boiler scale and corrosion inhibitor and the preparation method thereof comprise the following steps: s1, adding deionized water into the reaction kettle, starting stirring, S2, adding potassium hydroxide into the reaction kettle, S3, adding sodium tungstate into the reaction kettle, and S4, sequentially adding sodium pyrophosphite, diethylenetriamine pentamethylenephosphonic acid, aminotrimethylenephosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the catalyst.
Drawings
FIG. 1 is a flow chart of the preparation method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides five technical solutions: a scale and corrosion inhibitor for low-pressure boilers and a preparation method thereof specifically comprise the following embodiments:
example 1
A low-pressure boiler corrosion and scale inhibitor comprises the following components in parts by weight: 10 parts of amino trimethylene phosphonic acid, 10 parts of hydrolyzed polymaleic anhydride, 1 part of sodium tungstate, 7.5 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 10 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 35 parts of ethylenediamine tetramethylene phosphonic acid and 23 parts of deionized water.
A preparation method of a low-pressure boiler scale and corrosion inhibitor comprises the following steps: adding deionized water into an S1 reaction kettle, starting stirring, S2 adding potassium hydroxide into the reaction kettle, S3 adding sodium tungstate into the reaction kettle, S4 sequentially adding sodium pyrophosphite, diethylenetriamine pentamethylene methylene phosphonic acid, aminotrimethylene phosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the catalyst, wherein the temperature in the whole process is controlled to be 40 ℃.
Example 2
A low-pressure boiler corrosion and scale inhibitor comprises the following components in parts by weight: 15 parts of amino trimethylene phosphonic acid, 10 parts of hydrolyzed polymaleic anhydride, 1.5 parts of sodium tungstate, 7 parts of potassium hydroxide, 3 parts of sodium pyrophosphate, 15 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 30 parts of ethylene diamine tetramethylene phosphonic acid and 15 parts of deionized water.
A preparation method of a low-pressure boiler scale and corrosion inhibitor comprises the following steps: adding deionized water into an S1 reaction kettle, starting stirring, S2 adding potassium hydroxide into the reaction kettle, S3 adding sodium tungstate into the reaction kettle, S4 sequentially adding sodium pyrophosphite, diethylenetriamine pentamethylene methylene phosphonic acid, aminotrimethylene phosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the catalyst, wherein the temperature in the whole process is controlled to be 43 ℃.
Example 3
A low-pressure boiler corrosion and scale inhibitor comprises the following components in parts by weight: 12 parts of amino trimethylene phosphonic acid, 15 parts of hydrolyzed polymaleic anhydride, 0.5 part of sodium tungstate, 8 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 13 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 33 parts of ethylenediamine tetramethylene phosphonic acid and 15 parts of deionized water.
A preparation method of a low-pressure boiler scale and corrosion inhibitor comprises the following steps: adding deionized water into an S1 reaction kettle, starting stirring, S2 adding potassium hydroxide into the reaction kettle, S3 adding sodium tungstate into the reaction kettle, S4 sequentially adding sodium pyrophosphate, diethylenetriamine pentamethylenephosphonic acid, aminotrimethylenephosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the catalyst, wherein the temperature in the whole process is controlled to be 45 ℃.
Example 4
A low-pressure boiler corrosion and scale inhibitor comprises the following components in parts by weight: 11 parts of amino trimethylene phosphonic acid, 15 parts of hydrolyzed polymaleic anhydride, 0.5 part of sodium tungstate, 8 parts of potassium hydroxide, 3 parts of sodium pyrophosphate, 11 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 32 parts of ethylene diamine tetramethylene phosphonic acid and 19 parts of deionized water.
A preparation method of a low-pressure boiler scale and corrosion inhibitor comprises the following steps: adding deionized water into an S1 reaction kettle, starting stirring, S2 adding potassium hydroxide into the reaction kettle, S3 adding sodium tungstate into the reaction kettle, S4 sequentially adding sodium pyrophosphate, diethylenetriamine pentamethylenephosphonic acid, aminotrimethylenephosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the catalyst, wherein the temperature in the whole process is controlled to be 47 ℃.
Example 5
A low-pressure boiler corrosion and scale inhibitor comprises the following components in parts by weight: 13 parts of amino trimethylene phosphonic acid, 13 parts of hydrolyzed polymaleic anhydride, 1.5 parts of sodium tungstate, 7 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 12 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 31 parts of ethylenediamine tetramethylene phosphonic acid and 19 parts of deionized water.
A preparation method of a low-pressure boiler scale and corrosion inhibitor comprises the following steps: adding deionized water into an S1 reaction kettle, starting stirring, S2 adding potassium hydroxide into the reaction kettle, S3 adding sodium tungstate into the reaction kettle, S4 sequentially adding sodium pyrophosphate, diethylenetriamine pentamethylenephosphonic acid, aminotrimethylenephosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the catalyst, wherein the temperature is controlled to be 50 ℃ in the whole process.
To sum up the above
The scale and corrosion inhibitor for the low-pressure boiler, which is finally obtained by researching and designing the characteristics of the low-pressure boiler, has excellent application effect and production value, creates indispensable guarantee for energy conservation and emission reduction of enterprises, can effectively reduce energy consumption, prolong the service life of equipment, can be applied to scale and corrosion inhibition of a low-pressure boiler device, can effectively prevent the scaling phenomenon of the low-pressure boiler and slow down the corrosion of the equipment by water, wherein the scale inhibition rate is more than 90 percent, and the carbon steel corrosion rate is less than or equal to 0.075 mm/a.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A scale and corrosion inhibitor for low-pressure boilers is characterized in that: the raw materials comprise the following components in parts by weight: 10-15 parts of amino trimethylene phosphonic acid, 10-15 parts of hydrolyzed polymaleic anhydride, 0.5-1.5 parts of sodium tungstate, 7-8 parts of potassium hydroxide, 3-3.5 parts of sodium pyrophosphate, 10-15 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 30-35 parts of ethylenediamine tetramethylene phosphonic acid and 15-25 parts of deionized water as the rest.
2. The low-pressure boiler scale and corrosion inhibitor according to claim 1, characterized in that: the components in parts by weight include: 10 parts of amino trimethylene phosphonic acid, 10 parts of hydrolyzed polymaleic anhydride, 1 part of sodium tungstate, 7.5 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 10 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 35 parts of ethylenediamine tetramethylene phosphonic acid and 23 parts of deionized water.
3. The low-pressure boiler scale and corrosion inhibitor according to claim 1, characterized in that: the components in parts by weight include: 15 parts of amino trimethylene phosphonic acid, 10 parts of hydrolyzed polymaleic anhydride, 1.5 parts of sodium tungstate, 7 parts of potassium hydroxide, 3 parts of sodium pyrophosphate, 15 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 30 parts of ethylene diamine tetramethylene phosphonic acid and 15 parts of deionized water.
4. The low-pressure boiler scale and corrosion inhibitor according to claim 1, characterized in that: the components in parts by weight include: 12 parts of amino trimethylene phosphonic acid, 15 parts of hydrolyzed polymaleic anhydride, 0.5 part of sodium tungstate, 8 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 13 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 33 parts of ethylenediamine tetramethylene phosphonic acid and 15 parts of deionized water.
5. The low-pressure boiler scale and corrosion inhibitor according to claim 1, characterized in that: the components in parts by weight include: 11 parts of amino trimethylene phosphonic acid, 15 parts of hydrolyzed polymaleic anhydride, 0.5 part of sodium tungstate, 8 parts of potassium hydroxide, 3 parts of sodium pyrophosphate, 11 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 32 parts of ethylene diamine tetramethylene phosphonic acid and 19 parts of deionized water.
6. The low-pressure boiler scale and corrosion inhibitor according to claim 1, characterized in that: the components in parts by weight include: 13 parts of amino trimethylene phosphonic acid, 13 parts of hydrolyzed polymaleic anhydride, 1.5 parts of sodium tungstate, 7 parts of potassium hydroxide, 3.5 parts of sodium pyrophosphate, 12 parts of diethylenetriamine pentamethylene methylene phosphonic acid, 31 parts of ethylenediamine tetramethylene phosphonic acid and 19 parts of deionized water.
7. A preparation method of a low-pressure boiler scale and corrosion inhibitor is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, adding deionized water into the reaction kettle, and starting stirring;
s2, adding potassium hydroxide into the reaction kettle;
s3, adding sodium tungstate into the reaction kettle;
s4, sequentially adding sodium pyrophosphate, diethylenetriamine pentamethylene methylene phosphonic acid, aminotrimethylene phosphonic acid, hydrolyzed polymaleic anhydride and ethylenediamine tetramethylene phosphonic acid, and fully and uniformly stirring to obtain the product.
8. The preparation method of the low-pressure boiler scale and corrosion inhibitor according to claim 7, characterized in that: the temperature in the whole process of the steps S1-S4 is controlled to be 40-50 ℃.
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| CN111704250A (en) * | 2020-06-19 | 2020-09-25 | 德蓝水技术股份有限公司 | Neutral corrosion and scale inhibitor for oil field and preparation method thereof |
| CN111705319A (en) * | 2020-06-19 | 2020-09-25 | 德蓝水技术股份有限公司 | Environment-friendly corrosion inhibitor for circulating water closed system and preparation method thereof |
| CN111875071A (en) * | 2020-06-22 | 2020-11-03 | 北京新叶能源科技有限公司 | Boiler water regulating agent and preparation method thereof |
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| CN111705319A (en) * | 2020-06-19 | 2020-09-25 | 德蓝水技术股份有限公司 | Environment-friendly corrosion inhibitor for circulating water closed system and preparation method thereof |
| CN111704250B (en) * | 2020-06-19 | 2022-05-06 | 德蓝水技术股份有限公司 | Neutral corrosion and scale inhibitor for oil field and preparation method thereof |
| CN111875071A (en) * | 2020-06-22 | 2020-11-03 | 北京新叶能源科技有限公司 | Boiler water regulating agent and preparation method thereof |
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Application publication date: 20200221 |