阅读说明：本技术 一种阻垢剂及其制备方法 (Scale inhibitor and preparation method thereof ) 是由 高峰 翟玉伟 张波 罗延升 苟桂明 朱永翔 于 2019-09-18 设计创作，主要内容包括：一种阻垢剂及其制备方法,属于阻垢技术领域。一种阻垢剂,按照重量份数计包括以下原料：10～30份聚羧酸和10～30份聚马来酸,以及10～50份聚甲基丙烯酸酯和10～40份聚苯乙烯磺酸盐组成的组中的至少一种。阻垢剂通过上述聚合物协同配合达到较佳的阻垢效果,更好的控制水中碳酸钙晶体和硅酸盐晶体的析出,能够较好的防止煤气化灰水或黑水系统设备管道结垢,控制无机盐垢、金属氧化物和胶状沉积,确保设备的正常运行。(A scale inhibitor and a preparation method thereof, belonging to the technical field of scale inhibition. The scale inhibitor comprises the following raw materials in parts by weight: 10-30 parts of polycarboxylic acid, 10-30 parts of polymaleic acid and at least one of the group consisting of 10-50 parts of polymethacrylate and 10-40 parts of polystyrene sulfonate. The scale inhibitor achieves a better scale inhibition effect through the synergistic cooperation of the polymers, better controls the precipitation of calcium carbonate crystals and silicate crystals in water, can better prevent the scaling of the pipelines of coal gasification grey water or black water system equipment, controls inorganic salt scale, metal oxides and colloidal deposition, and ensures the normal operation of the equipment.)

1. The scale inhibitor is characterized by comprising the following raw materials in parts by weight:

10-30 parts of polycarboxylic acid, 10-30 parts of polymaleic acid and at least one of the group consisting of 10-50 parts of polymethacrylate and 10-40 parts of polystyrene sulfonate.

2. The scale inhibitor according to claim 1, which comprises the following raw materials in parts by weight:

10-25 parts of polycarboxylic acid, 10-25 parts of polymaleic acid and at least one of the group consisting of 10-40 parts of polymethacrylate and 10-30 parts of polystyrene sulfonate.

3. The scale inhibitor according to claim 1, which comprises the following raw materials in parts by weight:

15-25 parts of polycarboxylic acid, 15-25 parts of polymaleic acid and at least one of the group consisting of 20-40 parts of polymethacrylate and 20-30 parts of polystyrene sulfonate.

4. The scale inhibitor according to claim 1, wherein the scale inhibitor comprises a surfactant comprising an anionic surfactant and/or a nonionic surfactant;

The non-ionic surfactant comprises any one or more of polypropylene glycol, polyethylene glycol and polyether;

The anionic surfactant comprises sodium alkyl benzene sulfonate and/or sodium alkyl sulfate.

5. The scale inhibitor according to claim 4, which comprises 0.1 to 20 parts by weight of the surfactant;

Optionally, the scale inhibitor comprises 0.1-15 parts of a surfactant;

Optionally, the scale inhibitor comprises 1-15 parts of a surfactant.

6. The scale inhibitor according to claim 1, wherein the polymethacrylate comprises Acumer 1850 produced by the Dow chemical industry.

7. The scale inhibitor of claim 1, wherein the polystyrene sulfonate comprises Versa-TL4 and/or Versa-TL500 from aksunobel.

8. The scale inhibitor according to claim 1, wherein the polycarboxylic acid comprises Belsperse164 manufactured by Bogevenner and/or XF 325 manufactured by Nantong Bisphonium chemical Co.

9. the scale inhibitor according to claim 1, wherein the polymaleic acid comprises XF321 manufactured by south-bound phosphine chemical limited.

10. A method for preparing the scale inhibitor according to any one of claims 1 to 9, wherein at least one of the group consisting of the polycarboxylic acid and the polymaleic acid, and the polymethacrylate and the polystyrene sulfonate is uniformly mixed in a ratio.

Technical Field

The application relates to the technical field of scale inhibition, and particularly relates to a scale inhibitor and a preparation method thereof.

background

scale inhibitors are commonly used in various water systems: the water quality control method comprises the following steps of (1) generally using a compound medicament of organic phosphorus or phosphorus-containing scale inhibitor for grey water, reverse osmosis, circulating cooling water, boiler water and the like, and discharging the organic phosphorus or phosphorus-containing scale inhibitor into the environment along with the discharge of water in the using process to cause the problem of water pollution caused by rich phosphorus in the water body of the environment.

Disclosure of Invention

the application provides a scale inhibitor which can achieve the effect equivalent to that of a phosphorus-containing scale inhibitor under the condition of not containing phosphorus.

The embodiment of the application is realized as follows:

in a first aspect, the present application provides a scale inhibitor, which comprises the following raw materials in parts by weight:

10-30 parts of polycarboxylic acid, 10-30 parts of polymaleic acid and at least one of the group consisting of 10-50 parts of polymethacrylate and 10-40 parts of polystyrene sulfonate.

In the technical scheme, the scale inhibitor can be applied to a coal gasification grey water or black water system, a better scale inhibition effect is achieved through the synergistic cooperation of the polymers, the precipitation of calcium carbonate crystals and silicate crystals in water is better controlled, the scaling of pipelines of the coal gasification grey water or black water system can be better prevented, inorganic salt scale, metal oxides and colloidal deposition are controlled, and the normal operation of equipment is ensured. Namely, the scale inhibitor can achieve the effect equivalent to that of a phosphorus-containing scale inhibitor under the condition of not containing phosphorus.

With reference to the first aspect, in a first possible example of the first aspect of the present application, the above scale inhibitor includes the following raw materials:

10-25 parts of polycarboxylic acid, 10-25 parts of polymaleic acid and at least one of the group consisting of 10-40 parts of polymethacrylate and 10-30 parts of polystyrene sulfonate.

With reference to the first aspect, in a second possible example of the first aspect of the present application, the scale inhibitor includes the following raw materials:

15-25 parts of polycarboxylic acid, 15-25 parts of polymaleic acid and at least one of the group consisting of 20-40 parts of polymethacrylate and 20-30 parts of polystyrene sulfonate.

in a third possible example of the first aspect of the present application in combination with the first aspect, the above scale inhibitor includes a surfactant including an anionic surfactant and/or a nonionic surfactant;

The nonionic surfactant comprises one or more of polypropylene glycol, polyethylene glycol and polyether;

Anionic surfactants include sodium alkyl benzene sulphonate and/or sodium alkyl sulphate.

In the above examples, the addition of the surfactant to the scale inhibitor is beneficial to changing the activity of the surface of suspended matters in black water and/or grey water, so that the polymer component in the scale inhibitor can be better combined with the surface of suspended matters such as coal ash, and meanwhile, the surfactant can clean the deposition in the inner part of the pipeline, thereby reducing the deposition of suspended matters such as coal ash in the black water and grey water pipeline, and thoroughly solving the problem of a gasification water system.

The cationic surfactant can react with the polymer component in the scale inhibitor to cause the scale inhibition performance of the polymer component to be reduced, so that the scale inhibition effect of the scale inhibitor is influenced, and the anionic surfactant and/or the nonionic surfactant can not react with the polymer component in the scale inhibitor to cause the scale inhibition performance of the polymer component to be reduced. Therefore, the scale inhibitor selected from the anionic surfactant and/or the nonionic surfactant has better scale inhibition performance.

In a fourth possible example of the first aspect of the present application in combination with the first aspect, the scale inhibitor includes 0.1 to 20 parts of a surfactant;

Optionally, the scale inhibitor comprises 0.1-15 parts of a surfactant;

Optionally, the scale inhibitor comprises 1-15 parts of a surfactant.

In a fifth possible example of the first aspect of the present application in combination with the first aspect, the polymethacrylate described above includes Acumer 1850.

In the above example, Acumer 1850 is a high temperature resistant scale inhibitor, and can be used in combination with other scale inhibitors to achieve good scale inhibition effect.

In a sixth possible example of the first aspect of the present application in combination with the first aspect, the above-mentioned polystyrene sulfonate comprises Versa-TL4 and/or Versa-TL 500.

In the above example, Versa-TL4 is a sodium polystyrene sulfonate of 20000 molecular weight from Aksu Nobel and Versa-TL500 is a sodium polystyrene sulfonate of 100000 molecular weight from Aksu Nobel.

In a seventh possible example of the first aspect of the present application in combination with the first aspect, the above-mentioned polycarboxylic acid comprises Belsperse164 and/or XF 325.

In the above example, Belsperse164 is a polycarboxylic acid scale inhibitor manufactured by Boger Warner, Inc.; XF 325 is a polycarboxylic acid scale inhibitor produced by Nantong Biphosphine chemical Co.

In an eighth possible example of the first aspect of the present application in combination with the first aspect, the polymaleic acid described above includes XF 321.

In the above example, XF321 is a polymaleic acid scale inhibitor manufactured by south china bisphosphine chemical limited.

in a second aspect, the present application provides a method for preparing a scale inhibitor, which comprises uniformly mixing a polycarboxylic acid and a polymaleic acid, and at least one of the group consisting of polymethacrylate and polystyrene sulfonate according to a mixing ratio.

In the technical scheme, the preparation method of the scale inhibitor is simple and convenient, and the prepared scale inhibitor has stable performance and can be applied to preventing the scaling and deposition of the coal gasification grey water or black water system equipment pipeline.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

fig. 1 is a schematic diagram of a production facility of the coalification gas provided by the embodiment of the present application.

Detailed Description

embodiments of the present application will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

Referring to fig. 1, coal and water are mixed into a coal slurry, and oxygen is added into a gasification furnace to burn and perform gasification reaction to generate synthesis gas (H)₂+CO+CO₂). The coal slag is discharged out of the gasification furnace from the bottom of the gasification furnace; the synthesis gas and the water vapor containing a small amount of coal ash are discharged from the gasification furnace, washed and then enter a downstream device; after the water (black water) discharged by the gasification furnace and the water (black water) for washing the synthesis gas are subjected to multi-stage flash evaporation and temperature reduction, the temperature is reduced from more than 200 ℃ to about 50 ℃ to 80 ℃, a flocculating agent is added to enter a slurry settling tank to remove coal ash, the clarified water (grey water) enters a grey water tank and is recycled to the gasification furnace to wash the coal gas and used as cooling water of the gasification furnace. During the circulation process of gasified black water and grey water, a large amount of suspended coal ash in the black water simultaneously dissolves a large amount of saturated calcium ions, magnesium ions, positive ions such as sodium ions and the like, negative ions such as carbonate ions, bicarbonate ions, chloride ions, sulfate ions, silicate ions and the like, during the circulation process of the ions, the saturated ions in the water easily grow scaling calcium carbonate crystals and silicate crystals on the surfaces of suspended matters, and the calcium carbonate crystals and the silicate crystals can be precipitated in the technical processes of pipelines, pumps, filters and the like to scale on the surfaces of the pipelines and equipment, so that the operation of the device is unstable, even the device is stopped, and the circulation process of the grey water also has the same problem. At present, the organic phosphorus compounded scale inhibitor is commonly used in factories, can interfere, prevent and control the precipitation of inorganic salt, and slightly reduces the inorganic saltThe small crystals are dispersed in the water body, and the dissolved medicament is kept, so that the generation of scale is reduced. The organic phosphorus can be degraded into phosphate radicals in the device to cause the scaling and deposition of calcium phosphate, and after the discharged grey water enters a sewage treatment system, the excessive phosphorus causes the over-standard of the phosphorus in the discharged sewage.

Suspended matters in the black water system are particularly high and can reach 5000mg/l, the corresponding turbidity is more than 3000NTU, the high suspended matters can adsorb scale inhibitors to cause the deposition and the scaling of the system, and the scale inhibitors with phosphorus and a small amount of phosphorus-free scale inhibitors in the market can only treat the scaling of the grey water system and can not effectively control the scaling and the deposition of the black water system.

The following description will be made specifically for a scale inhibitor and a preparation method thereof in the embodiments of the present application:

the application provides a scale inhibitor, which comprises the following raw materials in parts by weight:

10-30 parts of polycarboxylic acid, 10-30 parts of polymaleic acid and at least one of the group consisting of 10-50 parts of polymethacrylate and 10-40 parts of polystyrene sulfonate.

The methacrylate polymer can resist high temperature and higher pH, namely can take effect in alkaline solution, can effectively control the precipitation of carbonate crystals and sulfate crystals, and can control the deposition of suspended matters and coal ash in black water and grey water.

The polystyrene sulfonate has efficient infiltration and dispersion effects, has efficient scale inhibition and efficient dispersion effects, and can disperse suspended matters such as coal ash into water, so that the deposition of the coal ash in a system is reduced.

The polycarboxylic acid series polymer can resist the high temperature of black water and grey water systems and has good scale inhibition effect on calcium carbonate and calcium sulfate.

The polymaleic acid polymer has good scale inhibition performance under the high-temperature condition.

this application reaches the scale inhibition effect of preferred through multiple polymer cooperation in coordination, and the precipitation of calcium carbonate crystal and silicate crystal in the better control aquatic, the normal operating of equipment is ensured to the scale deposit of preventing coal gasification buck or black water system equipment pipeline that can be better, control inorganic salt dirt, metallic oxide and colloidal deposition, can be adapted to different systems and different quality of water.

Optionally, the scale inhibitor comprises the following raw materials:

10-25 parts of polycarboxylic acid, 10-25 parts of polymaleic acid and at least one of the group consisting of 10-40 parts of polymethacrylate and 10-30 parts of polystyrene sulfonate.

optionally, the scale inhibitor comprises the following raw materials:

15-25 parts of polycarboxylic acid, 15-25 parts of polymaleic acid and at least one of the group consisting of 20-40 parts of polymethacrylate and 20-30 parts of polystyrene sulfonate.

It is noted that at least one of the group consisting of polymethacrylate and polystyrene sulfonate includes polymethacrylate alone, polystyrene sulfonate alone, or a mixture of polymethacrylate and polystyrene sulfonate.

Polymethacrylates include Acumer 1850. Acumer 1850 is a weakly basic antiscalant produced by Dow chemical, having a pH of about 10, a density (25 ℃) of 1.19, and a Brookfield viscosity (25 ℃) of 225 mPas/cps.

The polystyrene sulfonate comprises Versa-TL4 and/or Versa-TL 500. Versa-TL4 is a sodium polystyrene sulfonate with molecular weight of 20000 produced by Acksonobel. Versa-TL500 is a sodium polystyrene sulfonate having a molecular weight of 100000 manufactured by Acksonobel.

it should be noted that Versa-TL4 and Versa-TL500 may be used together as a polystyrene sulfonate, Versa-TL4 may be used alone as a polystyrene sulfonate, or Versa-TL500 may be used alone as a polystyrene sulfonate.

the polycarboxylic acid includes Belsperse164 and/or XF 325. Belsperse164 is a polycarboxylic acid dispersant produced by Boger warner, and has a pH of about 3.5 to 4.5 after dilution and a viscosity (25 ℃) of 75 to 200 mm/sec. XF 325 is a polycarboxylic acid scale inhibitor produced by Nantong Biphosphine chemical Co.

It should be noted that both Belsperse164 and XF 325 may be used as polycarboxylic acids, and that Belsperse164 may be used alone as polycarboxylic acid, or XF 325 may be used alone as polycarboxylic acid.

The polymaleic acid comprises XF321, and the XF321 is a polymaleic acid scale inhibitor produced by Nantong Biphosphine chemical Limited.

The scale inhibitor also comprises 0.1-20 parts of surfactant according to parts by weight.

the addition of the surfactant in the scale inhibitor is beneficial to changing the activity of the surface of suspended matters in black water and/or grey water, so that polymer components in the scale inhibitor can be better combined on the surface of the suspended matters such as coal ash and the like, and meanwhile, the surfactants can clean out the deposition in a pipeline, thereby reducing the deposition of the suspended matters such as coal ash and the like in the black water and grey water pipelines, and thoroughly solving the problem of a gasification water system.

The surfactant includes an anionic surfactant and/or a nonionic surfactant.

The cationic surfactant can react with the polymer component in the scale inhibitor to cause the scale inhibition performance of the polymer component to be reduced, so that the scale inhibition effect of the polymer component is influenced, and the anionic surfactant and/or the nonionic surfactant can not react with the polymer component in the scale inhibitor to cause the scale inhibition performance of the polymer component to be reduced. Therefore, the scale inhibitor selected from the anionic surfactant and/or the nonionic surfactant has better scale inhibition performance.

The nonionic surfactant includes any one or more of polypropylene glycol, polyethylene glycol and polyether.

Anionic surfactants include sodium alkyl benzene sulphonate and/or sodium alkyl sulphate.

When a surfactant is selected, one or more anionic surfactants and one or more nonionic surfactants may be used in combination, or one or more anionic surfactants may be used alone or one or more nonionic surfactants may be used alone. The present application is not limited to specific types of nonionic surfactants and anionic surfactants, and other nonionic surfactants and anionic surfactants than those listed herein may be used.

Optionally, the scale inhibitor comprises 0.1-15 parts of a surfactant.

Optionally, the scale inhibitor comprises 1-15 parts of a surfactant.

The application also provides a preparation method of the scale inhibitor, which comprises the step of uniformly mixing at least one of the group consisting of polycarboxylic acid, polymaleic acid, polymethacrylate and polystyrene sulfonate according to the proportion.

the scale inhibitor has simple and convenient preparation method, has stable performance, and can be applied to preventing the scaling and deposition of coal gasification grey water or black water system equipment pipelines.

The scale inhibitor and the preparation method thereof are further described in detail with reference to the following examples.