CN114477479A - Online scale preventing and removing agent for circulating water - Google Patents
Online scale preventing and removing agent for circulating water Download PDFInfo
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- CN114477479A CN114477479A CN202210064659.8A CN202210064659A CN114477479A CN 114477479 A CN114477479 A CN 114477479A CN 202210064659 A CN202210064659 A CN 202210064659A CN 114477479 A CN114477479 A CN 114477479A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F5/12—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 nitrogen
-
- 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
- C02F5/12—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 nitrogen
- C02F5/125—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 nitrogen combined with inorganic substances
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
Abstract
The invention discloses an online scale prevention and removal agent for circulating water, belongs to the technical field of scale removal agents, and effectively solves the problem that the existing circulating water system cannot be integrally cleaned in the production and operation processes, wherein the online scale prevention and removal agent comprises the following raw materials in parts by weight: 30-50 parts of poly diamino terminated sodium acrylate, 10-30 parts of deionized water, 1-2 parts of imidazoline type surfactant, 1-2 parts of pH regulator, 1-5 parts of corrosion inhibitor, 1-5 parts of chelating agent, 5-10 parts of dissolving agent and 5-10 parts of cosolvent. The prepared poly diamino terminated sodium acrylate is used as a main raw material, can perform descaling operation of a circulating water system under the condition of not influencing the normal operation of the system, has good descaling effect and high efficiency, can effectively prevent calcium and magnesium ions from reacting to form precipitates in the descaling process by adding the imidazoline surfactant, the corrosion inhibitor, the chelating agent and the cosolvent, avoids the phenomenon of pipe blockage caused by dirt, has low cost, and has good economic benefit and wide market prospect.
Description
Technical Field
The invention belongs to the technical field of scale removers, and particularly relates to an online scale prevention and removal agent for circulating water.
Background
Any production device can not be opened, and domestic and foreign circulating water systems relate to all production industries and are mainly classified into two types: industrial circulating water systems and municipal central heating and water heating systems. At present, three problems of scale formation, corrosion and microorganism adhesion and sludge adhesion of a circulating water system are solved by adopting a technology for reducing scale formation speed, corrosion speed and microorganism breeding speed, the technology cannot solve the problem of scale accumulation and gradual reduction of heat exchange efficiency, cannot keep the clean running state of the circulating water system, and cannot remove formed scale in an online non-corrosive manner.
In order to maintain the operation quality of the circulating water system, a method of periodically cleaning the circulating water system is generally adopted. The conventional method for removing the scale is to dissolve the scale and the rust by acid, and to prevent the corrosion of the acid to the metal by using a corrosion inhibitor, but the method has certain difficulty in controlling the acid corrosion of the metal, cannot prevent the electrochemical corrosion among different materials, can cause different degrees of damage to equipment in the cleaning process, and is accompanied with the generation of a large amount of gas, so that the cleaning operation of the whole circulating water system cannot be realized in the parking and running states due to the generation of the gas.
Meanwhile, the circulating water treatment technology in all countries in the world at present also adopts the mode that the scale inhibitor is used for reducing the growth speed of water scale, the corrosion inhibitor is used for slowing down the oxygen corrosion of a system metal body, and the bactericide is used for preventing the growth of microorganisms in water. The scale inhibitor is combined with calcium and magnesium ions in water in a complexing or chelating chemical form, so that when the scale inhibitor reaches saturated solubility, formed scale crystals are subjected to lattice distortion, formed scale is loose, and finally deposited in a system water storage tank in a scale residue form; the combination degree of the scale inhibitor and calcium and magnesium ions in water is called as scale inhibition rate, the scale inhibition rate determines the amount of hard scale which cannot be subjected to lattice distortion finally, the hard scale has great influence on the heat exchange efficiency of a system, generally, 1mm of scale on a heat exchange surface can reduce the heat exchange rate by 20-30%, so that the scale inhibitor can only reduce the formation speed of the scale, cannot stop the appearance and accumulation of the scale, has no cleaning effect on the formed scale, and seriously influences the operation efficiency and the operation quality of a circulating water system along with the increase of the operation time. Therefore, the design of the anti-scaling and descaling agent capable of realizing online cleaning of the circulating water has important significance for improving the operating efficiency of a circulating water system.
Disclosure of Invention
The invention aims to provide the online scale preventing and removing agent for the circulating water, aiming at the defects in the prior art, the online scale preventing and removing agent for the circulating water can be used for performing scale removing operation on a circulating water system under the condition of not influencing the normal operation of the system, has good scale removing effect and high efficiency, does not corrode various materials forming the system, does not cause the phenomenon of pipe blockage due to scale, is low in cost, and has good economic benefit and wide market prospect.
In order to achieve the purpose, the invention adopts the technical scheme that:
an online scale prevention and removal agent for circulating water comprises the following raw materials in parts by weight: 30-50 parts of poly diamino terminated sodium acrylate, 10-30 parts of deionized water, 1-2 parts of imidazoline type surfactant, 1-2 parts of pH regulator, 1-5 parts of corrosion inhibitor, 1-5 parts of chelating agent, 5-10 parts of dissolving agent and 5-10 parts of cosolvent.
The scale remover comprises the following raw materials in parts by weight: 40 parts of polydiamino-terminated sodium acrylate, 20 parts of deionized water, 2 parts of imidazoline type surfactant, 1 part of pH regulator, 2 parts of corrosion inhibitor, 3 parts of chelating agent, 8 parts of dissolving agent and 8 parts of cosolvent.
The scale remover comprises the following raw materials in parts by weight: 30 parts of polydiamino-terminated sodium acrylate, 10 parts of deionized water, 1 part of imidazoline type surfactant, 1 part of pH regulator, 1 part of corrosion inhibitor, 1 part of chelating agent, 5 parts of dissolving agent and 5 parts of cosolvent.
The scale remover comprises the following raw materials in parts by weight: 50 parts of polydiamino-terminated sodium acrylate, 30 parts of deionized water, 2 parts of imidazoline type surfactant, 2 parts of pH regulator, 5 parts of corrosion inhibitor, 5 parts of chelating agent, 10 parts of dissolving agent and 10 parts of cosolvent.
The corrosion inhibitor is selected from one of mercaptobenzothiazole, ethylene diamine tetramethylene sodium phosphonate, benzotriazole and hexadecylamine.
The chelating agent is selected from one of polyphosphate, aminocarboxylic acid, hydroxycarboxylic acid and polyamine.
The dissolving agent is selected from one of oxalic acid, salicylic acid and glacial acetic acid.
The cosolvent is selected from one of sodium benzoate, sodium salicylate and p-aminobenzoic acid.
A preparation method of an online scale prevention and removal agent for circulating water comprises the following steps:
s1: weighing deionized water and polydiamino-terminated sodium acrylate according to a proportion, pouring the weighed deionized water into a preparation container, adding the weighed polydiamino-terminated sodium acrylate into the deionized water, and uniformly stirring;
s2: weighing a corrosion inhibitor, a chelating agent, an imidazoline surfactant, a dissolving agent and a cosolvent according to a ratio, mixing the weighed corrosion inhibitor and the chelating agent imidazoline surfactant, and grinding the mixture into powder to obtain a mixture;
s3: adding the mixture, the dissolving agent and the cosolvent in the step S2 into the mixed solution of the poly diamino terminated sodium acrylate and the deionized water in the step S1, stirring uniformly,
s4: and (4) weighing and adding the pH regulator according to the proportion, adding the weighed pH regulator into the mixed liquid obtained in the step S3, and uniformly stirring to obtain the circulating water online anti-scaling and descaling agent.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention takes the poly diamino terminated sodium acrylate as the main raw material, overcomes the Van der Waals attraction (intermolecular force) between scale molecules by utilizing the self energy of the poly diamino terminated sodium acrylate molecular functional group, leads the scale molecules to be adsorbed around the functional group, achieves the purpose of descaling and solves the problem that the existing circulating water system can not be cleaned integrally in the production and operation process;
2) the imidazoline-type surfactant, the corrosion inhibitor, the chelating agent and the cosolvent are added, so that the calcium and magnesium ions can be effectively prevented from reacting to form precipitates in the descaling process, the phenomenon of pipe blockage due to dirt is avoided, the descaling operation of a circulating water system can be performed under the condition that the normal operation of the system is not influenced, the descaling efficiency is high, the descaling effect is good, the cost is low, and the good economic benefit and the wide market prospect are realized;
3) the scale removal operation of the circulating water system is realized in a mode that the functional groups adsorb scale molecules, the scale-free operation can be achieved for a long time, the scale removal device is suitable for circulating water systems with different purposes such as urban central heating and heating water systems, cooling water circulating systems, industrial steam boilers and the like, the scale removal effect is high, and the application range is wide;
4) the invention has no adverse effect on normal production and equipment, is safe and harmless to operators, and has simple operation, practicality and reliability.
Detailed Description
The present invention will now be described in detail with reference to specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
The invention discloses an online scale prevention and removal agent for circulating water, which comprises the following raw materials in parts by weight: 30-50 parts of poly diamino terminated sodium acrylate, 10-30 parts of deionized water, 1-2 parts of imidazoline type surfactant, 1-2 parts of pH regulator, 1-5 parts of corrosion inhibitor, 1-5 parts of chelating agent, 5-10 parts of dissolving agent and 5-10 parts of cosolvent.
The imidazoline-type surfactant contains anionic and cationic ionic groups in molecules, can emulsify grease attached to the inner wall of a pipeline, has good decontamination, foaming and emulsifying properties, can play a good synergistic effect with a corrosion inhibitor, and reduces corrosion of the scale remover to the metal surface.
The corrosion inhibitor is selected from one of mercaptobenzothiazole, ethylene diamine tetramethylene sodium phosphonate, benzotriazole and hexadecylamine, can react with an anode region and a cathode region of a metal surface in water, and a reaction product of the corrosion inhibitor can be adsorbed on the clean metal surface to form a molecular protective film so as to prevent water and dissolved oxygen in the water from diffusing to the metal surface, thereby achieving the purpose of corrosion inhibition and effectively reducing the probability of pipeline scaling phenomenon.
The chelating agent is selected from one of polyphosphate, aminocarboxylic acid, hydroxycarboxylic acid and polyamine, and can effectively prevent metal ions such as calcium, magnesium and the like from generating chemical reaction to form precipitates in the descaling process, so that system equipment and pipelines are prevented from being scaled, and original scales of a water circulation system can be gradually removed.
The dissolving agent is selected from one of oxalic acid, salicylic acid and glacial acetic acid, can realize the quick dissolution of the descaling agent on the scale, and can obviously improve the descaling efficiency.
The cosolvent is selected from one of sodium benzoate, sodium salicylate and p-aminobenzoic acid, can accelerate the dissolution of the medicament in water, and improves the dissolution efficiency of the scale remover in a water circulation system.
A preparation method of an online scale prevention and removal agent for circulating water comprises the following steps:
s1: weighing deionized water and polydiamino-terminated sodium acrylate according to a proportion, pouring the weighed deionized water into a preparation container, adding the weighed polydiamino-terminated sodium acrylate into the deionized water, and uniformly stirring;
s2: weighing a corrosion inhibitor, a chelating agent, an imidazoline surfactant, a dissolving agent and a cosolvent according to a ratio, mixing the weighed corrosion inhibitor and the chelating agent imidazoline surfactant, and grinding the mixture into powder to obtain a mixture;
s3: adding the mixture, the dissolving agent and the cosolvent in the step S2 into the mixed solution of the poly diamino terminated sodium acrylate and the deionized water in the step S1, stirring uniformly,
s4: and (4) weighing and adding the pH regulator according to the proportion, adding the weighed pH regulator into the mixed liquid obtained in the step S3, and uniformly stirring to obtain the circulating water online anti-scaling and descaling agent.
The specific embodiment is as follows:
example 1
An online scale prevention and removal agent for circulating water comprises the following raw materials in parts by weight: 40 parts of polydiamino-terminated sodium acrylate, 20 parts of deionized water, 2 parts of imidazoline type surfactant, 1 part of pH regulator, 2 parts of corrosion inhibitor, 3 parts of chelating agent, 8 parts of dissolving agent and 8 parts of cosolvent.
Example 2
An online scale prevention and removal agent for circulating water comprises the following raw materials in parts by weight: 30 parts of polydiamino-terminated sodium acrylate, 10 parts of deionized water, 1 part of imidazoline type surfactant, 1 part of pH regulator, 1 part of corrosion inhibitor, 1 part of chelating agent, 5 parts of dissolving agent and 5 parts of cosolvent.
Example 3
An online scale prevention and removal agent for circulating water comprises the following raw materials in parts by weight: 50 parts of polydiamino-terminated sodium acrylate, 30 parts of deionized water, 2 parts of imidazoline type surfactant, 2 parts of pH regulator, 5 parts of corrosion inhibitor, 5 parts of chelating agent, 10 parts of dissolving agent and 10 parts of cosolvent.
Application example
And (3) reagent sources: preparing a circulating water scale-free descaling agent according to the raw materials described in the examples 1-3;
the application range is as follows: and (5) cleaning all equipment in the circulating water system. Such as industrial cooling and circulating water systems, each of which typically comprises 100 and 2000 pieces of industrial equipment; the urban central heating system comprises 5-50 families; the central air-conditioning system and the power boiler system can form other water systems which circulate independently.
The test duration is as follows: the raw materials recorded in examples 1-3 are used for preparing the circulating water scale-free descaling agent to respectively complete the application test of a five-cycle industrial cooling circulating water system, and the test time is not less than 3 months.
The cleaning mode is as follows: under the condition of normal production, the prepared circulating water scale-free descaling agent is added into the system at one time.
And (3) cleaning results: according to the raw materials recorded in the examples 1-3, the time required for cleaning a set of industrial circulating water system is respectively 30d, 49d and 46d, and the cleaning quality standard reaching rate is 100%.
Safety is as follows: in the process of removing scale in a circulating water system, no obvious equipment corrosion exists, and the dangers of chemical combustion, explosion and poisoning exist, and meanwhile, the problem of crop and fish death caused by discharged liquid does not exist.
The water-saving effect is as follows: can carry out the operation of continuation scale control scale removal under the normal production's of industrial circulating water system condition to can reach permanent no scale operation, need not to carry out the direct drainage and cool off, effectively realized the saving of water resource and utilized.
Economic benefits are as follows: compared with the existing pickling technology, the descaling agent has qualitative changes in aspects of cleaning safety, operation, cost, environmental protection and application range, the cleaning cost of the descaling agent is 15-40% of the existing cleaning cost, the consumption of make-up water can be obviously reduced by 10-25%, the power consumption can be saved by 5-15%, and the treatment capacity of circulating water and sewage can be reduced by more than 30-50%.
Therefore, the circulating water antiscaling and descaling agent which takes the polydiamino-terminated sodium acrylate as the main raw material can comprehensively replace the existing circulating water quality treatment technology, can effectively recover the heat exchange efficiency of the system, improves the production efficiency, and generates greater economic benefit.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained in the present document by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention.
Claims (9)
1. The online scale prevention and removal agent for the circulating water is characterized by comprising the following raw materials in parts by weight: 30-50 parts of poly diamino terminated sodium acrylate, 10-30 parts of deionized water, 1-2 parts of imidazoline type surfactant, 1-2 parts of pH regulator, 1-5 parts of corrosion inhibitor, 1-5 parts of chelating agent, 5-10 parts of dissolving agent and 5-10 parts of cosolvent.
2. The on-line scale prevention and removal agent for circulating water of claim 1, which comprises the following raw materials in parts by weight: 40 parts of polydiamino-terminated sodium acrylate, 20 parts of deionized water, 2 parts of imidazoline type surfactant, 1 part of pH regulator, 2 parts of corrosion inhibitor, 3 parts of chelating agent, 8 parts of dissolving agent and 8 parts of cosolvent.
3. The on-line scale prevention and removal agent for circulating water of claim 1, which comprises the following raw materials in parts by weight: 30 parts of polydiamino-terminated sodium acrylate, 10 parts of deionized water, 1 part of imidazoline type surfactant, 1 part of pH regulator, 1 part of corrosion inhibitor, 1 part of chelating agent, 5 parts of dissolving agent and 5 parts of cosolvent.
4. The on-line scale prevention and removal agent for circulating water of claim 1, which comprises the following raw materials in parts by weight: 50 parts of polydiamino-terminated sodium acrylate, 30 parts of deionized water, 2 parts of imidazoline type surfactant, 2 parts of pH regulator, 5 parts of corrosion inhibitor, 5 parts of chelating agent, 10 parts of dissolving agent and 10 parts of cosolvent.
5. The on-line scale and scale control agent for circulating water of any one of claims 1-4, wherein the corrosion inhibitor is selected from one of mercaptobenzothiazole, sodium ethylene diamine tetramethylene phosphonate, benzotriazole and hexadecylamine.
6. An on-line scale and scale control agent for circulating water according to any of claims 1-4, wherein said chelating agent is selected from one of polyphosphate, aminocarboxylic acid, hydroxycarboxylic acid and polyamine.
7. An on-line scale and scale control agent for circulating water according to any one of claims 1-4, wherein the dissolving agent is selected from one of oxalic acid, salicylic acid and glacial acetic acid.
8. An on-line scale and scale control agent for circulating water according to any one of claims 1-4, wherein the cosolvent is selected from one of sodium benzoate, sodium salicylate and p-aminobenzoic acid.
9. A method for preparing the circulating water online anti-scaling and descaling agent according to any one of claims 1 to 4, which is characterized by comprising the following steps:
s1: weighing deionized water and polydiamino-terminated sodium acrylate according to a proportion, pouring the weighed deionized water into a preparation container, adding the weighed polydiamino-terminated sodium acrylate into the deionized water, and uniformly stirring;
s2: weighing a corrosion inhibitor, a chelating agent, an imidazoline surfactant, a dissolving agent and a cosolvent according to a ratio, mixing the weighed corrosion inhibitor and the chelating agent imidazoline surfactant, and grinding the mixture into powder to obtain a mixture;
s3: adding the mixture, the dissolving agent and the cosolvent in the step S2 into the mixed solution of the poly diamino terminated sodium acrylate and the deionized water in the step S1, stirring uniformly,
s4: and (4) weighing and adding the pH regulator according to the proportion, adding the weighed pH regulator into the mixed liquid obtained in the step S3, and uniformly stirring to obtain the circulating water online anti-scaling and descaling agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114481140A (en) * | 2021-12-30 | 2022-05-13 | 上海丰信环保科技有限公司 | Circulating water corrosion inhibitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114481140A (en) * | 2021-12-30 | 2022-05-13 | 上海丰信环保科技有限公司 | Circulating water corrosion inhibitor |
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