CN110787601A - Heat-stable salt inhibitor for desulfurization system and solvent for removing sulfur dioxide - Google Patents
Heat-stable salt inhibitor for desulfurization system and solvent for removing sulfur dioxide Download PDFInfo
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- CN110787601A CN110787601A CN201810861571.2A CN201810861571A CN110787601A CN 110787601 A CN110787601 A CN 110787601A CN 201810861571 A CN201810861571 A CN 201810861571A CN 110787601 A CN110787601 A CN 110787601A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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Abstract
The invention discloses a heat-stable salt inhibitor for a desulfurization system and a solvent for removing sulfur dioxide, belonging to the technical field of gas purification. The heat-stable salt inhibitor comprises the following components in percentage by mass: 20 to 60 percent of phenolic compound or derivatives thereof, 0.1 to 15 percent of anthraquinone compound or derivatives thereof, and the balance of amine compound or derivatives thereof. The heat-stable salt inhibitor for the desulfurization system provided by the invention can obviously reduce the formation of heat-stable salts such as sulfate based on the phenolic compound and the derivative thereof, the organic amine compound and the derivative thereof, and the anthraquinone compound and the derivative thereof. Because the generation amount of the heat-stable salt is obviously reduced, the energy consumption of the heat-stable salt is also obviously reduced even if the heat-stable salt is subjected to post-treatment, and the pollution is avoided as far as possible.
Description
Technical Field
The invention relates to the technical field of gas purification, in particular to a heat-stable salt inhibitor for a desulfurization system and a solvent for removing sulfur dioxide.
Background
Sulfur dioxide pollution becomes an important factor for restricting the development of the economic society of China, and the problem of atmospheric pollution caused by sulfur dioxide discharged by industrial flue gas is increasingly severe. The atmospheric pollution not only harms the growth of animals and plants and destroys the ozone layer, but also causes the problems of acid rain, greenhouse effect and the like. Therefore, desulfurization of flue gas is an effective means for controlling sulfur dioxide pollution.
At present, the sulfur dioxide is usually removed by adopting an organic amine wet desulphurization process.
The inventors found that the following problems exist in the prior art:
the organic amine wet desulphurization process can generate a large amount of heat stability salt in the desulphurization process, and the heat stability salt needs to be subjected to post-treatment subsequently, so that the energy consumption is high, and the pollution is easily caused.
Disclosure of Invention
The embodiment of the invention provides a solvent for removing sulfur dioxide and a wet desulphurization process, which can solve the technical problems. The specific technical scheme is as follows:
in one aspect, the invention provides a heat-stable salt inhibitor for a desulfurization system, which comprises the following components in percentage by mass: 20 to 60 percent of phenolic compound or derivatives thereof, 0.1 to 15 percent of anthraquinone compound or derivatives thereof, and the balance of amine compound or derivatives thereof.
Optionally, the phenolic compound or the derivative thereof is a phenolic compound or a derivative thereof.
On the other hand, the embodiment of the invention provides a solvent for removing sulfur dioxide, which comprises the following components in percentage by mass: 10-75% of organic polyamine, 15-25% of strong acid, 0.01-4.00% of the heat-stable salt inhibitor and the balance of water.
Optionally, the organic polyamine comprises a diamine and/or a triamine.
Optionally, the diamine is ethylenediamine or a derivative thereof, 1, 2-propylenediamine or a derivative thereof, 1, 3-propylenediamine or a derivative thereof, hexamethylenediamine or a derivative thereof, N-tetramethylethylenediamine or a derivative thereof, p-phenylenediamine or a derivative thereof, or piperazine or a derivative thereof.
Optionally, the triamine is diethylenetriamine or a derivative thereof.
Optionally, the strong acid is at least one of hydrofluoric acid, sulfuric acid and nitric acid.
Optionally, the sulfur dioxide removal solvent system is suitable for a wet desulfurization process.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the heat-stable salt inhibitor for the desulfurization system provided by the invention can obviously reduce the formation of heat-stable salts such as sulfate based on the phenolic compound and the derivative thereof, the organic amine compound and the derivative thereof, and the anthraquinone compound and the derivative thereof. Because the generation amount of the heat-stable salt is obviously reduced, the energy consumption of the heat-stable salt is also obviously reduced even if the heat-stable salt is subjected to post-treatment, and the pollution is avoided as far as possible.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic representation of the sulfur dioxide absorption change for the sulfur dioxide removal solvent provided in examples 1-5 after addition of different heat stable salt inhibitors;
fig. 2 is a schematic diagram showing the change in the content of the heat-stable salt formed after the addition of the heat-stable salt inhibitor with respect to the sulfur dioxide-removing solvent provided in example 6.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In one aspect, the invention provides a heat-stable salt inhibitor for a desulfurization system, which comprises the following components in percentage by mass: 20 to 60 percent of phenolic compound or derivatives thereof, 0.1 to 15 percent of anthraquinone compound or derivatives thereof, and the balance of amine compound or derivatives thereof.
The heat-stable salt inhibitor for the desulfurization system provided by the invention can obviously reduce the formation of heat-stable salts such as sulfate based on the phenolic compound and the derivative thereof, the organic amine compound and the derivative thereof, and the anthraquinone compound and the derivative thereof. Because the generation amount of the heat-stable salt is obviously reduced, the energy consumption of the heat-stable salt is also obviously reduced even if the heat-stable salt is subjected to post-treatment, and the pollution is avoided as far as possible.
For example, the mass percentages of the phenolic compounds or derivatives thereof may be: 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, etc. The mass percentage of the anthraquinone compound or the derivative thereof can be as follows: 0.1%, 1%, 2%, 12%, 13%, 15%, etc.
Optionally, the phenolic compound or derivative thereof is a phenolic compound or derivative thereof.
Wherein, the phenol compound or the derivative thereof can be: catechol or a derivative thereof, hydroquinone or a derivative thereof, and the like.
The amine compound can be methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, aniline, p-toluidine, p-chloroaniline, p-nitroaniline, diphenylamine, etc.
The anthraquinone compounds and their derivatives may be: emodin, chrysophanol, rhein, alizarin, hydroxyalizarin, etc. of hydroxyanthraquinone, and also chrysophanol anthrone and chrysophanol of anthrone, chrysanthemoyl 514One, etc.
On the other hand, the embodiment of the invention also provides a solvent for removing sulfur dioxide, which comprises the following components in percentage by mass: 10% -75% of organic polyamine, 15% -25% of strong acid, 0.01-4.00% of the above-mentioned heat-stable salt inhibitor and the rest is water.
The solvent provided by the embodiment of the invention can be used for removing sulfur dioxide from a mixed gas containing sulfur dioxide, carbon monoxide, hydrogen fluoride, nitrogen and oxygen.
The action mechanism of the solvent for removing the sulfur dioxide is as follows: the sulfur dioxide is dissolved in the water to generate ionization and reversible reaction, and the organic polyamine reacts with the dissolved sulfur dioxide and hydrogen ions in the water to form amine salt so as to achieve the purpose of removing the sulfur dioxide.
The mechanism of action of the solvent for reducing the generation amount of the heat-stable salt is as follows: after being dissolved in water, sulfur dioxide reacts with oxygen and water to generate sulfate ions with good stability, and after the heat-stable salt inhibitor is added, free radicals carried by the oxygen ions and the sulfite ions are neutralized to interfere the generation of the sulfate ions, so that sulfite is generated, and heat-stable salts such as sulfate are inhibited from being generated.
Wherein, the mass percentage of the organic polyamine in the solvent can be: 10%, 15%, 20%, 25%, 35%, 40%, 55%, 60%, 75%, etc.; the mass percentage of the strong acid in the solvent can be: 15%, 20%, 22%, 25%, etc.; the heat-stable salt inhibitor may be present in the solvent in an amount of 0.01%, 0.05%, 0.10%, 0.18%, 2.00%, 3.00%, 4.00%, etc.
The following outlines each component of the above-mentioned solvent for removing sulfur dioxide:
the organic polyamine reacts with the dissolved sulfur dioxide and the hydrogen ions in the water in the solvent to form amine salt, which plays a role in removing the sulfur dioxide.
Optionally, the organic polyamine may be a diamine and/or a triamine.
Alternatively, the diamine may be ethylenediamine or a derivative thereof, such as N-methylethylenediamine; 1, 2-propanediamine or derivatives thereof, for example N, N-dimethyl-1, 2-propanediamine; 1, 3-propanediamine or derivatives thereof, for example N, N, N ', N' -tetramethyl-1, 3-propanediamine, N, N, N ', N' -tetramethylethylenediamine; p-phenylenediamine or its derivatives, such as N-methyl-p-phenylenediamine; piperazine or its derivatives, such as N-methylpiperazine and the like.
Alternatively, the triamine may be diethylenetriamine or a derivative thereof, such as N, N', N "-pentamethyldiethylenetriamine, or the like.
The organic polyamine may be one or a combination of the above diamines or triamines. Exemplary, a combination of N, N-tetramethylethylenediamine and piperazine; a combination of 1, 2-propanediamine and piperazine; a combination of p-phenylenediamine and diethylenetriamine; the combination of piperazine and diethylenetriamine may be N, N-tetramethylethylenediamine, p-phenylenediamine, piperazine, diethylenetriamine, etc. alone.
In order to adjust the acidity of the solvent and improve the removal effect of sulfur dioxide, the pH value of the solvent is adjusted by adding strong acid, and optionally, the strong acid can be one or more of hydrofluoric acid, sulfuric acid and nitric acid.
In order to inhibit the generation of heat-stable salts such as sulfate in the desulfurization solvent, reduce the energy consumption of heat-stable salt treatment and reduce the generation of sewage, a heat-stable salt inhibitor is added to inhibit the generation of heat-stable salts.
Alternatively, the above-mentioned solvent for removing sulfur dioxide can be applied to a wet desulfurization process.
The invention is further illustrated by the following specific examples:
the solvent systems of examples 1 to 7 of the present invention all include: 15% of N, N, N, N-tetramethylethylenediamine, 18% of piperazine, 20% of sulfuric acid, 3% of a heat-stable salt inhibitor, and the balance of water. Wherein the heat-stable salt inhibitor comprises the following components in percentage by weight:
example 1: 20% of catechol, 0.1% of emodin and 79.9% of dimethylamine;
example 2: 25% of hydroquinone, 1% of madder and 74% of ethylamine;
example 3: 35% of catechol, 2% of madder and 63% of ethylenediamine;
example 4: 40% of hydroquinone, 12% of alizarin and 48% of triethylamine;
example 5: 45% of hydroquinone, 13% of rhein and 42% of triethylamine;
example 6: 50% of catechol, 15% of rhein and 35% of ethylenediamine.
Example 7: blank space
In all of examples 1 to 6, example 7 was used in parallel as a parallel experiment.
Application examples
The evaluation of the absorption of sulfur dioxide using the above solvents provided in examples 1 to 5 was carried out under the following operating conditions: and adding mixed gas at the temperature of 60 ℃, wherein the content of the mixed gas is 3 Vol% of oxygen, 2.4 Vol% of sulfur dioxide, 11 Vol% of carbon dioxide and a small amount of nitrogen, reacting in a bubbling reactor, and monitoring the content of the sulfur dioxide after absorption on line by a gas analyzer.
As shown in fig. 1, compared with example 7, after the heat-stable salt inhibitors with different mass percentages are added into the desulfurization solvent, the absorption amount of sulfur dioxide in the desulfurization solvent is not greatly changed, i.e., the addition of the heat-stable salt inhibitor does not affect the absorption of sulfur dioxide by the sulfur dioxide removal solvent.
The solvent provided in example 6 was used to evaluate the content of heat stable salts formed in the desulfurization solvent, and the solvent operating conditions were as follows: and adding mixed gas at the temperature of 60 ℃, wherein the content of the mixed gas is 3 Vol% of oxygen, 2.4 Vol% of sulfur dioxide, 11 Vol% of carbon dioxide and a small amount of nitrogen, reacting in a bubbling reactor, and monitoring the content of the sulfur dioxide after absorption on line by a gas analyzer.
As shown in FIG. 2, the addition of heat-stable salt inhibitors such as 50% catechol, 15% rhein and 35% ethylenediamine, compared to example 7, inhibited the formation of heat-stable salts in the desulfurization solvent.
The sulfur dioxide removal solvent containing the heat-stable salt inhibitor provided by the embodiment of the invention shows a good heat-stable salt inhibition effect, the heat-stable salt content is well controlled even in an aerobic environment, and meanwhile, the sulfur dioxide in tail gas can be kept to be lower than 100mg/m3, and a good desulfurization effect is kept.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A heat-stable salt inhibitor for a desulfurization system is characterized by comprising the following components in percentage by mass: 20 to 60 percent of phenolic compound or derivatives thereof, 0.1 to 15 percent of anthraquinone compound or derivatives thereof, and the balance of amine compound or derivatives thereof.
2. The heat stable salt inhibitor for use in desulfurization systems of claim 1, wherein said phenolic compound or derivative thereof is a phenolic compound or derivative thereof.
3. The solvent for removing the sulfur dioxide is characterized by comprising the following components in percentage by mass: 10% -75% of an organic polyamine, 15% -25% of a strong acid, 0.01-4.00% of a heat stable salt inhibitor according to any one of claims 1-2, and the balance being water.
4. The solvent for removing sulfur dioxide as claimed in claim 3, wherein the organic polyamine comprises diamine and/or triamine.
5. The solvent for removing sulfur dioxide as claimed in claim 4, wherein said diamine is ethylenediamine or its derivative, 1, 2-propylenediamine or its derivative, 1, 3-propylenediamine or its derivative, hexamethylenediamine or its derivative, N, N-tetramethylethylenediamine or its derivative, p-phenylenediamine or its derivative, piperazine or its derivative.
6. The solvent for removing sulfur dioxide as claimed in claim 4, wherein the triamine is diethylenetriamine or its derivative.
7. The solvent for removing sulfur dioxide as recited in claim 3, wherein said strong acid is at least one of hydrofluoric acid, sulfuric acid, and nitric acid.
8. The sulfur dioxide-removing solvent according to claim 3, wherein the sulfur dioxide-removing solvent system is suitable for use in a wet desulfurization process.
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB273043A (en) * | 1926-04-15 | 1927-06-30 | British Dyestuffs Corp Ltd | Electrolytic desulphonation of anthraquinone sulphonic acids |
| US4102803A (en) * | 1973-12-27 | 1978-07-25 | Mitsubishi Shoji Kaisha, Ltd. | Oxygen-consuming composition |
| JPS5665616A (en) * | 1980-10-01 | 1981-06-03 | Mitsui Toatsu Chem Inc | Oxidation-reduction chemical for wet desulfurization process |
| CA2000027A1 (en) * | 1988-10-04 | 1990-04-04 | Christiaan P. Van Dijk | Hydrogen sulfide removal and sulfide recovery |
| US5077023A (en) * | 1989-08-01 | 1991-12-31 | Basf Aktiengesellschaft | Reduction in the rate of oxidation of sulfite solutions |
| US5167941A (en) * | 1988-11-29 | 1992-12-01 | The Dow Chemical Company | Quaternary polyamines as sulfite oxidation inhibitors in amine scrubbing of SO2 |
| NZ243672A (en) * | 1991-07-27 | 1994-06-27 | Solvay Interox Ltd | Process for removing hydrogen sulphide with simultaneous production of sulphur and hydrogen peroxide |
| CN1169335A (en) * | 1996-07-02 | 1998-01-07 | 四川川化集团公司 | Method for taking off hydrogen sulfide from mixed gas |
| CN101766954A (en) * | 2010-03-08 | 2010-07-07 | 华北电力大学（保定） | Composite type organic inhibitor for magnesia desulfuration by-product recovery |
| CN102133500A (en) * | 2011-03-07 | 2011-07-27 | 中国恩菲工程技术有限公司 | Method for removing sulfur dioxide in smoke |
| CN103349886A (en) * | 2013-08-07 | 2013-10-16 | 北京国电龙源环保工程有限公司 | Reproducible polytertiaryamine sulfur dioxide absorbent and preparation method thereof |
| US20140060328A1 (en) * | 2012-08-30 | 2014-03-06 | IFP Energies Nouvelles | Method of absorbing acid compounds contained in a gaseous effluent using an amine-based aqueous solution |
| CN103908872A (en) * | 2014-04-04 | 2014-07-09 | 泰兴电除尘设备厂有限公司 | Absorbent for recycling sulfur dioxide from industrial waste gas and recycling method |
| CN105214445A (en) * | 2014-06-05 | 2016-01-06 | 中国石油化工股份有限公司 | A kind of amine absorbent for removing sulfur dioxide in gaseous mixture |
| US20160009993A1 (en) * | 2013-03-06 | 2016-01-14 | Mitsubishi Gas Chemical Company, Inc. | Oxygen absorbent composition and molded body and package using the same |
| US20160243491A1 (en) * | 2013-10-15 | 2016-08-25 | Beijing Boyuan Hengsheng High-Technology Co., Ltd | Method for Removing SOx from Gas with Compound Alcohol-Amine Solution |
| CN105983310A (en) * | 2015-01-30 | 2016-10-05 | 中国石油天然气股份有限公司 | Absorbent for selectively absorbing sulfur dioxide and application thereof |
| WO2018078154A1 (en) * | 2016-10-31 | 2018-05-03 | Shell Internationale Research Maatschappij B.V. | Process for removing sulfur dioxide from a gas stream |
-
2018
- 2018-08-01 CN CN201810861571.2A patent/CN110787601B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB273043A (en) * | 1926-04-15 | 1927-06-30 | British Dyestuffs Corp Ltd | Electrolytic desulphonation of anthraquinone sulphonic acids |
| US4102803A (en) * | 1973-12-27 | 1978-07-25 | Mitsubishi Shoji Kaisha, Ltd. | Oxygen-consuming composition |
| JPS5665616A (en) * | 1980-10-01 | 1981-06-03 | Mitsui Toatsu Chem Inc | Oxidation-reduction chemical for wet desulfurization process |
| CA2000027A1 (en) * | 1988-10-04 | 1990-04-04 | Christiaan P. Van Dijk | Hydrogen sulfide removal and sulfide recovery |
| US5167941A (en) * | 1988-11-29 | 1992-12-01 | The Dow Chemical Company | Quaternary polyamines as sulfite oxidation inhibitors in amine scrubbing of SO2 |
| US5077023A (en) * | 1989-08-01 | 1991-12-31 | Basf Aktiengesellschaft | Reduction in the rate of oxidation of sulfite solutions |
| NZ243672A (en) * | 1991-07-27 | 1994-06-27 | Solvay Interox Ltd | Process for removing hydrogen sulphide with simultaneous production of sulphur and hydrogen peroxide |
| CN1169335A (en) * | 1996-07-02 | 1998-01-07 | 四川川化集团公司 | Method for taking off hydrogen sulfide from mixed gas |
| CN101766954A (en) * | 2010-03-08 | 2010-07-07 | 华北电力大学（保定） | Composite type organic inhibitor for magnesia desulfuration by-product recovery |
| CN102133500A (en) * | 2011-03-07 | 2011-07-27 | 中国恩菲工程技术有限公司 | Method for removing sulfur dioxide in smoke |
| US20140060328A1 (en) * | 2012-08-30 | 2014-03-06 | IFP Energies Nouvelles | Method of absorbing acid compounds contained in a gaseous effluent using an amine-based aqueous solution |
| US20160009993A1 (en) * | 2013-03-06 | 2016-01-14 | Mitsubishi Gas Chemical Company, Inc. | Oxygen absorbent composition and molded body and package using the same |
| CN103349886A (en) * | 2013-08-07 | 2013-10-16 | 北京国电龙源环保工程有限公司 | Reproducible polytertiaryamine sulfur dioxide absorbent and preparation method thereof |
| US20160243491A1 (en) * | 2013-10-15 | 2016-08-25 | Beijing Boyuan Hengsheng High-Technology Co., Ltd | Method for Removing SOx from Gas with Compound Alcohol-Amine Solution |
| CN103908872A (en) * | 2014-04-04 | 2014-07-09 | 泰兴电除尘设备厂有限公司 | Absorbent for recycling sulfur dioxide from industrial waste gas and recycling method |
| CN105214445A (en) * | 2014-06-05 | 2016-01-06 | 中国石油化工股份有限公司 | A kind of amine absorbent for removing sulfur dioxide in gaseous mixture |
| CN105983310A (en) * | 2015-01-30 | 2016-10-05 | 中国石油天然气股份有限公司 | Absorbent for selectively absorbing sulfur dioxide and application thereof |
| WO2018078154A1 (en) * | 2016-10-31 | 2018-05-03 | Shell Internationale Research Maatschappij B.V. | Process for removing sulfur dioxide from a gas stream |
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