You must know about the power plant desulfurization defoamer that exploded when asked!!!!!

You must know about the power plant desulfurization defoamer 

that exploded when asked!

The energy consumption of various countries is mainly based on coal, so a large amount of sulfur dioxide, nitrogen oxides and smoke will be produced when burning coal. Such combustion pollutes the air very seriously, so desulfurization treatment is required.

What is power plant desulfurization?

Desulfurization in power plants refers to the removal of sulfur from fuel before combustion and the desulfurization process before flue gas discharge. It is one of the important technical measures to prevent and control air pollution.

Desulfurization methods can generally be divided into three categories: pre-combustion desulfurization, desulfurization during combustion and post-combustion desulfurization, and these three processes are prone to generate foam during operation, resulting in falsely high liquid levels in the tower, slurry overflow, and loss of Raw materials, heat exchanger fouling and clogging, and dust accumulation at the entrance of the absorption tower will eventually affect the desulfurization effect of limestone. Therefore, foam control is the most important thing. Generally, power plants control foam generation by adding power plant desulfurization defoamer.

Our common power plant desulfurization technology is flue gas desulfurization. Flue gas desulfurization is divided into three categories: wet, dry and semi-dry. 

The most widely used method is wet desulfurization. Through the technology of limestone, lime and gypsum, the desulfurization rate can reach more than 95%, which is very stable.

Foaming principle of power plant desulfurization

1. Boiler combustion problem

Insufficient boiler combustion, fly ash contains carbon particles or unburned particles such as tar. The flue gas enters the absorption tower with fly ash containing a large amount of carbon particles or unburned particles such as tar, which will cause an increase in the content of organic matter in the slurry in the absorption tower, followed by saponification reaction, resulting in an oil film. In the process of blowing high-pressure air into the slurry tank at the bottom of the absorption tower through the oxidation fan, the oil film is impacted by high pressure, which causes the slurry to foam and overflow.

2. Excess MgO

Limestone for desulfurization contains excessive MgO, which will produce a large amount of foam after reacting with sulfur oxides.

3. The water quality of process water is not up to standard

The FGD dehydration system or wastewater treatment system was not properly put into operation, causing the slurry to gradually deteriorate and foam.

4. The air volume of the oxidation fan is unreasonable

When the amount of oxidation air entering the suction tower exceeds the actual need, the excess air will overflow from the bottom of the oxidation zone to the surface of the slurry in the form of bubbles.

Hazards of foam

1. During the desulfurization process, too much foam in the absorption tower will lead to a thick foam layer, which will compress and reduce the reaction space of the slurry in the absorption tower, increase the load capacity of the slurry in the desulfurization process, and weaken the desulfurization efficiency. .

2. If the foam in the desulfurization tower is not cleaned up in time, the desulfurization device of the desulfurization tower will be overloaded for a long time. During this process, the sulfate concentration in the slurry will continue to increase, resulting in overflow of the desulfurization foam.

3. Foam can also cause false liquid level phenomena and some effects on heat exchangers.

What are the characteristics of desulfurization and defoaming agents in power plants

1. Rapid defoaming, long foam suppression time

The defoaming speed is fast, the antifoaming ability is strong, the dosage is small, and the basic properties of the foaming system will not be affected.

2. Quick dispersion, easy to dissolve in water, high compatibility.

3. Good high temperature stability

Good heat resistance and chemical stability. No adverse side effects, non-flammable, non-explosive.

4. Stable chemical properties do not affect the operation of the desulfurization system

The addition of the defoamer will not affect the normal operation of the desulfurization system, and there will be no situation in which the gas indicators of the effluent are not up to standard.

Products Recommended

Product description:

XY-48T defoamer is a polyether high-efficiency defoamer.

Product advantages:

The defoaming speed is fast, and the effect is stable during the storage period. It has better defoaming and antifoaming performance in a strong alkaline environment (pH 12.0).

Application fields:

It is mainly recommended to be used in industrial cleaning, metal processing, power plant desulfurization, and water reducing agent.