Professional PP defogger manufacturer

demisterThe main performance, characteristics, and design parameters of

1： Main performance parameters

1. The defogging performance can be represented by the defogging efficiency.

Defogging efficiency refers to the ratio of the mass of droplets captured by a defogger per unit time to the mass of droplets entering the defogger.

Generally, it is required that the average droplet content of the defogger during one flushing cycle be less than 75mg/Nm3. The fog droplets with a particle size greater than 15um in this area are standard dry smoke.

2. Pressure drop

Pressure drop refers to the pressure loss generated by the flue gas passing through the defogger channel. The higher the system pressure, the higher the energy consumption ratio generated. The pressure drop of the demister in the wet desulfurization system is generally required to be between 120-200pa (two-stage demister)

2： Characteristic parameters of defogger

1: Critical separation particle size of defogger

The waveform board defogger uses the inertial force of droplets for separation. Under the airflow velocity, droplets with larger particle size have greater inertial force and are easier to separate. When the droplet size is smaller than a certain degree, the defogger loses its ability to separate and capture the droplets.

2: The critical flue gas velocity of the defogger is within the range of flue gas velocity, and the separation of liquid droplets by the defogger increases with the increase of flue gas velocity. However, when the flue gas velocity exceeds the velocity, the defogging ability decreases. This critical flue gas velocity is called the defogger critical flue gas velocity.

3： Main design parameters of defogger

1: Smoke velocity

Excessive or insufficient flue gas flow velocity through the section of the defogger is not conducive to the normal operation of the defogger. Excessive flue gas flow velocity can easily cause

2:PP defoggerblade pitch

The size of the blade spacing has a significant impact on the defogging efficiency of the defogger. The defogging efficiency decreases with the increase of blade spacing.

3: The number of stages of the defogger

As the number of stages increases, the defogging efficiency also increases, and the pressure loss also increases accordingly. The design requirements of the defogger aim to improve defogging efficiency and reduce pressure loss.

4: The flushing water pressure of the defogger

The water pressure of the defogger is generally determined based on factors such as the characteristics of the flushing nozzle and the distance between the defogger. When the flushing water pressure is low, the flushing effect is poor.

5: The flushing water volume of the defogger

In addition to meeting the requirements of the defogger itself, it is also necessary to consider the requirements of system water balance when selecting the amount of flushing water for the defogger treatment

6: Rinse coverage rate

The flushing coverage rate refers to the degree to which the flushing water covers the cross-section of the defogger. According to different working conditions, the flushing coverage rate can generally be

7: Mist remover flushing cycle

The flushing cycle refers to the time interval between each flushing of the defogger. Due to the increased amount of water carried by the flue gas during the flushing of the defogger

The flat defogger adopts a two-layer defogging and three-layer flushing structure, with the critical working surface in a horizontal shape; This design is mainly aimed at desulfurization towers with relatively uniform flue gas, and it is not suitable to use towers with small cross-section and high flue gas flow velocity.