Power plant desulphurization defoamer and preparing method thereof

Abstract

The invention discloses a power plant desulphurization defoamer and a preparing method thereof and relates to the technical field of desulfuration treatment. The power plant desulphurization defoamer contains siloxane-oxyalkylene copolymer, modified polyether, monostearin, fumed silica, compound emulsifier, simethicone emulgator, dimethyl dichloroethane, polyethylene glycol 6000 distearate and deionized water. The power plant desulphurization defoamer is specially used for thermal power plant smoke desulphurization and can reduce the surface tension of liquid, prevent the generation of foam and reduce the amount of original foam, and then foam breaking and foam inhibition are achieved at the same time and a stable and remarkable defoaming effect is realized.

Description

technical field

[0001] The invention relates to the technical field of desulfurization treatment, in particular to a desulfurization defoamer for power plants and a preparation method thereof. Background technique

[0002] Thermal power plants generally use coal to generate electricity. Since coal contains a certain amount of sulfur, and sulfur is an important pollutant in the atmosphere, the flue gas of thermal power plants needs to be desulfurized before it can be discharged. At present, the main method of desulfurization treatment is to use desulfurization agent for desulfurization, and the desulfurization agent usually used is limestone slurry.

[0003] During the operation of the desulfurization unit, some factors may cause the slurry in the absorption tower to foam, and then cause the absorption tower to overflow. These factors may be:

[0004] (1) The imported flue gas dust exceeds the standard;

[0005] (2) The coal quality is poor, the boiler combustion is insuff...

Examples

Embodiment 1

[0033] A power plant desulfurization defoamer, which contains the following components with corresponding mass fractions: polyoxyalkylene ether grafted polysiloxane 18.2%, modified polyether 3.2%, monoglyceride 2.8%, fumed silica 2.8%, compound emulsifier 2.5%, simethicone emulsifier 1.9%, dimethyl dichloroethane 0.9%, polyethylene glycol 6000 distearate 0.7%, deionized water 67%; The emulsifier is composed of S-60 emulsifier and T-60 emulsifier, and the ratio of the two is 1:1.

[0034] The power plant desulfurization defoamer is made according to the following steps:

[0035] (1) Stir monoglyceride and polyethylene glycol 6000 distearate and heat to 180±5°C to form a mixture;

[0036] (2) Cool the mixture to 65±5°C, then add dimethyl dichloroethane, modified polyether and polyoxyalkylene ether grafted polysiloxane, and add a compound emulsifier to emulsify for 30±2 minutes, Form the first emulsion after emulsification;

[0037] (3) Heating deionized water to the same temp...

Embodiment 2

[0042] A power plant desulfurization defoamer, which contains the following components with corresponding mass fractions: polyoxyalkylene ether grafted polysiloxane 20%, modified polyether 4.0%, monoglyceride 3.0%, fumed silica 3.0%, compound emulsifier 2.8%, simethicone emulsifier 2.0%, dimethyl dichloroethane 1.0%, polyethylene glycol 6000 distearate 0.8%, deionized water 63.4%; The emulsifier is composed of S-60 emulsifier and T-60 emulsifier, and the ratio of the two is 1:1.

[0043] The power plant desulfurization defoamer is made according to the following steps:

[0044] (1) Stir monoglyceride and polyethylene glycol 6000 distearate and heat to 180±5°C to form a mixture;

[0045] (2) Cool the mixture to 65±5°C, then add dimethyl dichloroethane, modified polyether and polyoxyalkylene ether grafted polysiloxane, and add a compound emulsifier to emulsify for 30±2 minutes, Form the first emulsion after emulsification;

[0046] (3) Heating deionized water to the same temp...

Embodiment 3

[0051] A power plant desulfurization defoamer, which contains the following components with corresponding mass fractions: polyoxyalkylene ether grafted polysiloxane 21.6%, modified polyether 4.7%, monoglyceride 3.2%, fumed silica 3.2%, compound emulsifier 3.0%, simethicone emulsifier 2.2%, dimethyl dichloroethane 1.1%, polyethylene glycol 6000 distearate 1.0%, deionized water 60%; The emulsifier is composed of S-60 emulsifier and T-60 emulsifier, and the mass ratio of the two is 1:1.

[0052] The power plant desulfurization defoamer is made according to the following steps:

[0053] (1) Stir monoglyceride and polyethylene glycol 6000 distearate and heat to 180±5°C to form a mixture;

[0054](2) Cool the mixture to 65±5°C, then add dimethyl dichloroethane, modified polyether and polyoxyalkylene ether grafted polysiloxane, and add a compound emulsifier to emulsify for 30±2 minutes, Form the first emulsion after emulsification;

[0055] (3) Heating deionized water to the same ...

technical field

[0001] The invention relates to the technical field of desulfurization treatment, in particular to a desulfurization defoamer for power plants and a preparation method thereof. Background technique

[0002] Thermal power plants generally use coal to generate electricity. Since coal contains a certain amount of sulfur, and sulfur is an important pollutant in the atmosphere, the flue gas of thermal power plants needs to be desulfurized before it can be discharged. At present, the main method of desulfurization treatment is to use desulfurization agent for desulfurization, and the desulfurization agent usually used is limestone slurry.

[0003] During the operation of the desulfurization unit, some factors may cause the slurry in the absorption tower to foam, and then cause the absorption tower to overflow. These factors may be:

[0004] (1) The imported flue gas dust exceeds the standard;

[0005] (2) The coal quality is poor, the boiler combustion is insuff...

Examples

Embodiment 1

[0033] A power plant desulfurization defoamer, which contains the following components with corresponding mass fractions: polyoxyalkylene ether grafted polysiloxane 18.2%, modified polyether 3.2%, monoglyceride 2.8%, fumed silica 2.8%, compound emulsifier 2.5%, simethicone emulsifier 1.9%, dimethyl dichloroethane 0.9%, polyethylene glycol 6000 distearate 0.7%, deionized water 67%; The emulsifier is composed of S-60 emulsifier and T-60 emulsifier, and the ratio of the two is 1:1.

[0034] The power plant desulfurization defoamer is made according to the following steps:

[0035] (1) Stir monoglyceride and polyethylene glycol 6000 distearate and heat to 180±5°C to form a mixture;

[0036] (2) Cool the mixture to 65±5°C, then add dimethyl dichloroethane, modified polyether and polyoxyalkylene ether grafted polysiloxane, and add a compound emulsifier to emulsify for 30±2 minutes, Form the first emulsion after emulsification;

[0037] (3) Heating deionized water to the same temp...

Embodiment 2

[0042] A power plant desulfurization defoamer, which contains the following components with corresponding mass fractions: polyoxyalkylene ether grafted polysiloxane 20%, modified polyether 4.0%, monoglyceride 3.0%, fumed silica 3.0%, compound emulsifier 2.8%, simethicone emulsifier 2.0%, dimethyl dichloroethane 1.0%, polyethylene glycol 6000 distearate 0.8%, deionized water 63.4%; The emulsifier is composed of S-60 emulsifier and T-60 emulsifier, and the ratio of the two is 1:1.

[0043] The power plant desulfurization defoamer is made according to the following steps:

[0044] (1) Stir monoglyceride and polyethylene glycol 6000 distearate and heat to 180±5°C to form a mixture;

[0045] (2) Cool the mixture to 65±5°C, then add dimethyl dichloroethane, modified polyether and polyoxyalkylene ether grafted polysiloxane, and add a compound emulsifier to emulsify for 30±2 minutes, Form the first emulsion after emulsification;

[0046] (3) Heating deionized water to the same temp...

Embodiment 3

[0051] A power plant desulfurization defoamer, which contains the following components with corresponding mass fractions: polyoxyalkylene ether grafted polysiloxane 21.6%, modified polyether 4.7%, monoglyceride 3.2%, fumed silica 3.2%, compound emulsifier 3.0%, simethicone emulsifier 2.2%, dimethyl dichloroethane 1.1%, polyethylene glycol 6000 distearate 1.0%, deionized water 60%; The emulsifier is composed of S-60 emulsifier and T-60 emulsifier, and the mass ratio of the two is 1:1.

[0052] The power plant desulfurization defoamer is made according to the following steps:

[0053] (1) Stir monoglyceride and polyethylene glycol 6000 distearate and heat to 180±5°C to form a mixture;

[0054](2) Cool the mixture to 65±5°C, then add dimethyl dichloroethane, modified polyether and polyoxyalkylene ether grafted polysiloxane, and add a compound emulsifier to emulsify for 30±2 minutes, Form the first emulsion after emulsification;

[0055] (3) Heating deionized water to the same ...