Overhead type rectangular wet electric precipitator

Abstract

The invention provides an overhead type rectangular wet electric precipitator. The main body section of the electric precipitator is of a rectangular cylindrical structure and comprises a spray washing system, an anode module, a cathode module, a spray humidification system and a uniform distribution device; the electric precipitator is also provided with a shell self-supporting structure which comprises an inner column, an outer column, a main truss, an auxiliary truss and an annular truss; the inner column provided with the main truss is adhered to the outer wall of an absorption tower, and the top end of the main truss is used for supporting the wet electric precipitator; the main truss and the auxiliary truss are spaced from each other and are connected mutually to transfer load; the top end of the outer column provided with the auxiliary truss is used for supporting the wet electric precipitator; the annular truss is attached to the outer wall of the absorption tower; the inner column is arranged on the annular truss. Uniform partition in the precipitator can be realized, the cathode system and the anode system are produced in a modularized manner; the self-supporting structure does not need to occupy land and has no influence on the mounting and the overhauling of the original absorption tower; the effective dust collection area is increased, and the dust removal efficiency is improved.

Description

technical field [0001] The invention relates to the field of flue gas dust removal and purification, in particular to a top-mounted rectangular wet electrostatic precipitator. Background technique [0002] With the continuous improvement of the country's dust emission standards for coal-fired boiler tail gas, the dust emission requirements have been greatly increased to 10mg / Nm 3 Even 5mg / Nm 3 . Moreover, the SO carried in the flue gas after wet desulfurization 3 Aerosols and "gypsum rain" particles have also become new pollution sources, which shows that the demand for ultra-clean dust removal technology is imminent. [0003] The common dry electrostatic precipitator, electrostatic bag composite precipitator and bag filter are used as the front-end dust control technology, which cannot effectively guarantee the ultra-clean emission of flue gas and dust after the desulfurization device. As a terminal dust control technology, wet electrostatic precipitator is a powerful g...

AI Technical Summary

Problems solved by technology

Due to the irregular shape of the circular expanding diameter wet electrostatic precipitator in the actual design, when the plate-line matching design is carried out, the internal partitions are uneven, and there are usually different regions, and the area of ​​the dust collecting poles between the regions is different, up to 25%; the division is uneven, and the cathode and anode systems cannot realize mass modular design, which makes more difficulties encountered in the process of equipment production, and there are many forms of production molds, the same material, multiple specifications, and complex management;

[0005] During the design and production process, there are many types of cathode and anode materials, specifications and models, and the differences between different models are small. During the installation process, it is easy to have wrong installation. After the installation is wrong, it will take time and effort to disassemble and reinstall;

[0006] At the same time, the support structure of the top-mounted circular wet electrostatic precipitator is complex, usually in the form of steel brackets outside the tower. The steel brackets outside the tower wrap the original absorption tower and occupy a large area; Pipeline layout with absorption tower; and further have a greater impact on the desulfurization system body, auxiliary equipment, pipeline operation, installation, overhaul, commissioning, maintenance, etc.

Images