Sulfur dioxide removal composition, and preparation method and desulfurization method thereof

Abstract

The invention belongs to the technical field of gas separation and purification, and concretely relates to a sulfur dioxide removal composition, and a preparation method and a desulfurization method thereof. The technical problems to be solved by the present invention comprise low desulfurization rate and low desorption rate of existing desulfurization agents. The sulfur dioxide removal composition comprises 5-50 parts by weight of a main absorbent, 0.1-20 parts by weight of an activator, 0.05-5 parts by weight of a corrosion inhibitor, 25-95 parts by weight of water, and an acid; the additionamount of the acid makes the pH value of the sulfur dioxide removal composition be 4.0-5.0; the corrosion inhibitor is composed of a metal oxide and monooleic acid imidazoline; the main absorbent isdiazabicyclooctane; and the activator is at least one selected from hydroxyethylethylenediamine, diethylenetriamine, tetraethylenepentamine, triethylenetetramine and triethylenediamine. The sulfur dioxide removal composition has the advantages of good sulfur dioxide absorption effect, high absorption speed, high absorption capacity, high desorption rate and low energy consumption in desorption, and has a desorption rate of 94.08-99.28%.

Description

technical field

[0001] The invention belongs to the technical field of gas separation and purification, and in particular relates to a sulfur dioxide removal composition, a preparation method and a desulfurization method. Background technique

[0002] The acid rain formed by sulfur dioxide and other acid gases has brought serious damage to industrial and agricultural production and seriously polluted the environment. With the gradual popularization of the scientific concept of development such as "circular economy, clean production, and harmonious society", the country's increasing emphasis on air pollution caused by sulfur dioxide, and the formulation and implementation of relevant environmental protection laws and regulations. On June 7, 2012, the Ministry of Environmental Protection issued a series of eight pollutant discharge standards for the iron and steel industry, covering various processes such as mining and dressing, sintering, coking, ironmaking, steelmaking, stee...

Examples

preparation example Construction

[0030] The present invention provides a preparation method for the above-mentioned sulfur dioxide removal composition, comprising: mixing a main absorbent, an activator, a corrosion inhibitor, an acid, and water to obtain a sulfur dioxide removal composition; when an antioxidant is also included, the main absorbent , an activator, an antioxidant, a corrosion inhibitor, and an acid are added to water and mixed to obtain a desulfurization composition.

[0031] Furthermore, the temperature at which the above components are mixed is 20-50°C.

[0032] The sulfur dioxide removal composition provided by the invention can remove and recover sulfur dioxide gas mixed with limestone roasting kiln flue gas, blast furnace gas, natural gas, etc., and can remove and recover sulfur dioxide in gases such as power plant boiler flue gas and sulfuric acid dioxide industrial tail gas. Sulfur dioxide solution has the advantages of large absorption capacity, high purification degree, fast absorption...

Embodiment 1

[0046] The composition of the simulated flue gas in this embodiment is calculated by volume: SO 2 : 1%; CO 2 : 5.4%; O 2 : 14.7%; H 2 O: 10.2%; CO: 1.05%; NOx: 0.05%, and the rest is nitrogen.

[0047] The preparation method of the sulfur dioxide removal composition of this embodiment: 180 grams of diazabicyclooctane, 20 grams of tetraethylenepentamine, 6 grams of dodecyl hydroquinone, 4 grams of antimony potassium tartrate, 3 grams of mono-oil Add imidazoline to 500 ml of water, adjust the pH of the solution with 0.5 mol / L sulfuric acid, stir evenly, and quantify it to 1000 g with distilled water, the pH of the solution is 4.70, so as to obtain the flue gas desulfurization composition solution.

[0048] The method for removing sulfur dioxide in the flue gas in this embodiment: heat 1000 grams of the sulfur dioxide removal composition solution prepared in this embodiment to 50° C., and use a micro vacuum pump to send the sulfur dioxide removal agent from the upper end of th...

Embodiment 2

[0057] The composition of the simulated flue gas in this embodiment is calculated by volume: SO 2 : 6%; CO 2 : 5.4%; O 2 : 14.7%; H 2 O: 10.2%; CO: 1.05%; NOx: 0.05%, and the rest is nitrogen.

[0058] The preparation method of the sulfur dioxide removal composition of this embodiment: 280 grams of diazabicyclooctane, 20 grams of diethylenetriamine, 50 grams of tetraethylenepentamine, 5 grams of dodecyl hydroquinone, 3.5 grams of tartaric acid Add antimony potassium and 4.5 grams of mono-oil imidazoline into 500 milliliters of water, adjust the pH of the solution with 0.5 mole / liter of sulfuric acid, stir evenly, and quantify it to 1000 grams with distilled water, and the pH of the solution is 4.70, thereby obtaining flue gas desulfurization Composition solution.

[0059] The method for removing sulfur dioxide in the flue gas, desorption steps, determination of absorption capacity, desorption amount and absorption rate in this embodiment are the same as those in Example 1,...

technical field

[0001] The invention belongs to the technical field of gas separation and purification, and in particular relates to a sulfur dioxide removal composition, a preparation method and a desulfurization method. Background technique

[0002] The acid rain formed by sulfur dioxide and other acid gases has brought serious damage to industrial and agricultural production and seriously polluted the environment. With the gradual popularization of the scientific concept of development such as "circular economy, clean production, and harmonious society", the country's increasing emphasis on air pollution caused by sulfur dioxide, and the formulation and implementation of relevant environmental protection laws and regulations. On June 7, 2012, the Ministry of Environmental Protection issued a series of eight pollutant discharge standards for the iron and steel industry, covering various processes such as mining and dressing, sintering, coking, ironmaking, steelmaking, stee...

Examples

preparation example Construction

[0030] The present invention provides a preparation method for the above-mentioned sulfur dioxide removal composition, comprising: mixing a main absorbent, an activator, a corrosion inhibitor, an acid, and water to obtain a sulfur dioxide removal composition; when an antioxidant is also included, the main absorbent , an activator, an antioxidant, a corrosion inhibitor, and an acid are added to water and mixed to obtain a desulfurization composition.

[0031] Furthermore, the temperature at which the above components are mixed is 20-50°C.

[0032] The sulfur dioxide removal composition provided by the invention can remove and recover sulfur dioxide gas mixed with limestone roasting kiln flue gas, blast furnace gas, natural gas, etc., and can remove and recover sulfur dioxide in gases such as power plant boiler flue gas and sulfuric acid dioxide industrial tail gas. Sulfur dioxide solution has the advantages of large absorption capacity, high purification degree, fast absorption...

Embodiment 1

[0046] The composition of the simulated flue gas in this embodiment is calculated by volume: SO 2 : 1%; CO 2 : 5.4%; O 2 : 14.7%; H 2 O: 10.2%; CO: 1.05%; NOx: 0.05%, and the rest is nitrogen.

[0047] The preparation method of the sulfur dioxide removal composition of this embodiment: 180 grams of diazabicyclooctane, 20 grams of tetraethylenepentamine, 6 grams of dodecyl hydroquinone, 4 grams of antimony potassium tartrate, 3 grams of mono-oil Add imidazoline to 500 ml of water, adjust the pH of the solution with 0.5 mol / L sulfuric acid, stir evenly, and quantify it to 1000 g with distilled water, the pH of the solution is 4.70, so as to obtain the flue gas desulfurization composition solution.

[0048] The method for removing sulfur dioxide in the flue gas in this embodiment: heat 1000 grams of the sulfur dioxide removal composition solution prepared in this embodiment to 50° C., and use a micro vacuum pump to send the sulfur dioxide removal agent from the upper end of th...

Embodiment 2

[0057] The composition of the simulated flue gas in this embodiment is calculated by volume: SO 2 : 6%; CO 2 : 5.4%; O 2 : 14.7%; H 2 O: 10.2%; CO: 1.05%; NOx: 0.05%, and the rest is nitrogen.

[0058] The preparation method of the sulfur dioxide removal composition of this embodiment: 280 grams of diazabicyclooctane, 20 grams of diethylenetriamine, 50 grams of tetraethylenepentamine, 5 grams of dodecyl hydroquinone, 3.5 grams of tartaric acid Add antimony potassium and 4.5 grams of mono-oil imidazoline into 500 milliliters of water, adjust the pH of the solution with 0.5 mole / liter of sulfuric acid, stir evenly, and quantify it to 1000 grams with distilled water, and the pH of the solution is 4.70, thereby obtaining flue gas desulfurization Composition solution.

[0059] The method for removing sulfur dioxide in the flue gas, desorption steps, determination of absorption capacity, desorption amount and absorption rate in this embodiment are the same as those in Example 1,...

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