Synergistic scale-inhibiting heavy metal remover as well as preparation method and application thereof

A technology for removing agents and heavy metals, applied in descaling and water softening, chemical instruments and methods, gaseous discharge wastewater treatment, etc., can solve problems such as environmental hazards, strong water solubility, ecological environment damage, etc. The effect of mass production and low process requirements

Pending Publication Date: 2021-12-21
北京可林维尔化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the boiler has improved production efficiency, the flue gas discharged during the use of the boiler contains a large amount of sulfur dioxide and dust, which has caused great damage to the ecological environment. By installing a desulfurization device at the tail of the flue gas and adding an alkaline desulfurizer Remove the above pollutants
The treatment of boiler flue gas is a hot topic nowadays. Although the boiler flue gas treatment system is put into operation, metal ions and other dust in the flue gas, especially calc

Method used

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  • Synergistic scale-inhibiting heavy metal remover as well as preparation method and application thereof
  • Synergistic scale-inhibiting heavy metal remover as well as preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0054] The present invention also provides the preparation method of the removing agent, comprising the steps of:

[0055] (1) Mix the composite chelating agent and the first part of water to obtain a mixed system A;

[0056] (2) Mix the synergist and the remaining water to obtain a mixed system B;

[0057] (3) Mix the mixing system A, a mixing system B to obtain a system C;

[0058] (4) Mix the system C and dispersing agent, i.e., the deterioration of the deterioration.

[0059] In the present invention, the mass of the first part of the water in the step (1) is preferably 40 to 60% of the water quality, still more preferably 45 to 55%, more preferably 48 to 52%.

[0060] In the present invention, the temperature of the mixing in the step (1) is preferably 30 to 50 ° C, more preferably 35 to 45 ° C, more preferably 38 to 42 ° C; the mixed manner is preferably stirring, the mixing The rotational speed is preferably 150 to 200 rpm, more preferably from 160 rpm, more preferably from 1...

Example Embodiment

[0067] Example 1

[0068] It is called 23 parts of polyteenine / glutamine graft copolymer, 18 parts of amino trimethyl phosphate, 17 parts of ethylene glycol double (2-aminoethylene ether) tetracetic acid, 10 servility carboxymethylcellulose, 8 parts of polyopamine and 8 parts of ammonium polyphosphate gave a composite chelating agent.

[0069] It is weighed 10 parts sodium thiosulfate, 10 parts of dimethyl dithiocarbamate, 5 parts of diethyl dithiocarbamate, 6 parts of triatronocyanate and 10 parts of ammonium chloride to obtain a synergist .

[0070] 12 parts of polyimalelic acid, 6 servion / tether-chromatograms and 5 parts of hydroxypropate / vinyl sulfonate were obtained from sodium acrylic acid / acrylic acid.

[0071] The mass ratio of the composite chelating agent, a synergist, dispersant, and water is 12: 22: 8: 25.

[0072] The removing agent was prepared by using the following steps: mixing the composite chelating agent and 50% water, the temperature of the temperature...

Example Embodiment

[0077] Example 2

[0078] 20 parts of polyethylenepartic acid / flying amine graft copolymer, 16 parts of amino trimethyl phosphate, 18 parts of ethylene glycol double (2-aminoethyl ether) tetracetic acid, 9 parts of carboxymethylcellulose, 6 parts of polyoxamine and 7.5 parts of ammonium ammonium ammonium were composite chelating agents.

[0079] 12 parts sodium thiosulfate, 5 parts of dimethyl dithiocarbamate, 8 parts of diethyl dithiocarbamate, 6 parts of tri-thiocyanate and 7 parts of ammonium chloride to obtain a synergist .

[0080] 10 parts of polyimaleic acid, 8 servion / tether acidic copolymers and 7 parts of acrylic / hydroxypropyl ester / vinyl sulfonate were obtained from dispersing agent.

[0081] The mass ratio of the composite chelating agent, a synergist, dispersant and water is 11: 23: 9: 30.

[0082] The removing agent was prepared by mixing the composite chelating agent and 40% by 40 ° C, stirring at a rotational speed of 190 rpm to obtain a mixed system A;

[...

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Abstract

The invention belongs to the technical field of scale inhibition of metal salt compounds. The invention provides a synergistic scale-inhibiting heavy metal remover, the mass ratio of a composite chelating agent to a synergist to a dispersant to water is (10-15): (20-25): (5-10): (20-30), in the synergistic scale-inhibiting heavy metal remover, calcium, magnesium, chromium, cadmium, lead, nickel, copper and mercury in slurry after flue gas desulfurization are chelated through the chelation of the composite chelating agent, and metal compounds are prevented from being deposited on a desulfurization slurry circulating pipeline and a nozzle to influence the desulfurization effect; the synergist improves the capacity of the chelating agent, and meanwhile, the synergist and the chelating agent jointly act to remove metal ions, so that the content of the metal ions is reduced; and the dispersant has a dispersing effect, the whole system is not easy to settle, and the dispersant can be combined with metal ions to prevent generation of scale samples. The heavy metals in the slurry are chelated into insoluble substances, and then the heavy metals deposited in the solid are removed together after the slurry is dehydrated, so that the pollution to the environment is prevented.

Description

technical field [0001] The invention relates to the technical field of scale inhibition of metal salt compounds, in particular to a synergistic scale inhibition heavy metal remover and its preparation method and application. Background technique [0002] Boilers are common production equipment in production and life, and are often used in thermal power plants, smelting, petroleum, chemical, pharmaceutical and other enterprises. Although the boiler has improved production efficiency, the flue gas discharged during the use of the boiler contains a large amount of sulfur dioxide and dust, which has caused great damage to the ecological environment. By installing a desulfurization device at the tail of the flue gas and adding an alkaline desulfurizer Remove the above pollutants. The treatment of boiler flue gas is a hot topic nowadays. Although the boiler flue gas treatment system is put into operation, metal ions and other dust in the flue gas, especially calcium and magnesium...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F103/18
CPCC02F5/145C02F2101/22C02F2101/20C02F2103/18
Inventor 王学博王方园
Owner 北京可林维尔化工有限公司
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