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Function of electric demister

2017-03-27View Original

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Our factory has newly launched a waste acid pyrolysis project, and we are not very familiar with the functioning structure of electric mist eliminators. We would appreciate it if experts could provide us with some guidance
Reply #22017-03-27
We have also just started using it for desulfurization and denitration. Working principle of the electric mist remover: Through an electrostatic control device and a DC high-voltage generator, alternating current is converted into direct current and sent to the mist removal unit. A strong electric field is created between the corona wire (cathode) and the acid mist collection plate (anode), causing air molecules to be ionized and generating a large number of electrons as well as positive and negative ions. These electrons and ions move in a directed manner under the influence of the electric field force, thereby serving as a medium for capturing acid mist. At the same time, the acid mist particles are charged; under the influence of electric field forces, these charged particles move in a directed manner and reach the anode plate designed to capture the acid mist. Thereafter, the charged particles release electrons on the plates, causing the acid mist to accumulate; under the effect of gravity, it flows into the acid storage tank of the acid mist remover, thereby achieving the purpose of purifying the acid mist.
Reply #32017-03-27
Why is water added to the electrostatic demister? Are the two electrostatic mist eliminators used in series? Does the demister need to be cleaned regularly?
Reply #42017-03-28
Water is added to prevent excessive dryness; it does not conduct electricity. They are used in series, at the first and second stages, and it is necessary to flush them regularly to keep the cathode wires clean. Cleaning is required when operations are suspended
Reply #52017-03-28
When used in series normally, does one need to cut it out during cleaning? How much water needs to be added? Do I need to top it up every day?
Reply #62017-03-30
Hello, which manufacturer makes the electric demister used in your facility? We would like to install one as well
Reply #72017-03-30
Since it’s still in the infrastructure development phase, I’m not sure; I’ll ask once it’s over
Reply #82017-04-01
You can take a look at this article. The application of electric mist eliminators in sulfuric acid production exhaust gases – from the website of the China Sulfuric Acid Industry Association. The exhaust gases emitted by sulfuric acid manufacturers are a key focus for environmental management; therefore, it is important to balance economic benefits with environmental protection considerations during the production of sulfuric acid. Many challenges arise in dealing with the exhaust gases generated in sulfuric acid production, among which the treatment of acid mist is an issue that needs to be addressed urgently. The use of electrostatic mist eliminators in the sulfuric acid production process is an effective way to address the issue of acid mist; therefore, it is essential to pay attention to installing such eliminators in sulfuric acid production lines. This paper analyzes the significance of mist removal from sulfuric acid production exhaust gases, and explores the application methods of electric mist eliminators in such exhaust gases, including their structure and working principle, quality control methods, and application examples. In addition, the issues that need attention when using electric demisters are also briefly explained. Sulfuric acid is a relatively common raw material in industrial production, mainly used in the manufacture of industrial products such as batteries, detergents, pigments, medicines, and fertilizers. It is also required in dye production, metal smelting, and oil purification processes. The exhaust gases emitted during sulfuric acid production can pollute the environment; therefore, scientific and appropriate technologies must be used to treat these exhaust gases. Based on practical work experience, this paper explores the issues related to the use of electric mist eliminators in the treatment of exhaust gases from sulfuric acid production, with the aim of effectively improving the economic efficiency of sulfuric acid production enterprises and promoting the development of this industry. 1. The mist removal issue in sulfuric acid production exhaust gases. To produce sulfuric acid with high purity and concentration, process technologies with high conversion rates are typically required in practical operations. The conversion rate of the sulfuric acid production processes used in China can currently reach over 95%. Despite such high conversion rates, further improvements are still needed in exhaust gas treatment, especially regarding the removal of sulfuric acid mist. (1) During sulfuric acid production, the gas volume and concentration experience significant fluctuations; under such conditions, it is very easy for the acid temperature and concentration to fail to be effectively controlled, resulting in sulfuric acid vapor exceeding the absorption threshold or saturation value. After the above situation occurs, a large amount of acid mist is generated when steam condenses. If this acid mist in the exhaust gases cannot be effectively removed, it will affect the operation of the desulfurization unit. Currently, core desulfurization equipment such as packed towers and empty towers is widely used in sulfuric acid production. These desulfurization devices have limited mist removal capabilities, and it is difficult to achieve satisfactory mist removal results even when alkaline absorbents are used in the desulfurization process. (2) The condenser and purification sections are the main areas where sulfuric acid mist is formed; the acid mist particles generated are relatively small, generally
Reply #92017-04-02
The answer upstairs was very professional. That's how it is

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