Absorption tower for flue gas desulfurization and method for equalizing flow of flue gas in absorption tower

Abstract

The invention provides an absorption tower for flue gas desulfurization. The absorption tower comprises a flue gas flow equalizing device positioned above an inlet flue of the absorption tower, wherein the flue gas flow equalizing device sequentially comprises a supporting beam, a lower-layer supporting grating, a lower-layer sealing net, bin dividing partition plates, a flow equalizing layer, an upper-layer sealing net and an upper-layer supporting grating from bottom to top, the flow equalizing layer is formed by flow equalizing balls, the plate faces of the bin dividing partition plates are vertically arranged, the bin dividing partition plates at least comprise four plates and are arranged in a multi-row multi-column #-shaped mode so as to form nine or more partition bins, the numbers of the flow equalizing balls arranged in at least two partition bins with the same horizontal sectional area in the flow equalizing device are different, the supporting beam is used for supporting the whole flue gas flow equalizing device and is formed by a hollow square pipe, the lower-layer supporting grating and the upper-layer supporting grating are also composed of hollow square pipes, the lower-layer supporting grating and the upper-layer supporting grating are integrally arranged to be of a multi-row and multi-column #-shaped structure corresponding to the bin dividing partition plates, and the upper-layer sealing net is modularly arranged. The absorption tower is low in smoke resistance and good in flue gas flow equalizing effect.

Description

technical field [0001] The invention belongs to the field of flue gas desulfurization, and in particular relates to an absorption tower for flue gas desulfurization and a method for uniform flow of flue gas in the absorption tower for flue gas desulfurization. Background technique [0002] The invention is mainly used in the field of limestone (lime)-gypsum wet flue gas desulfurization, and can also be used in occasions similar to vertical motion and large flow flue gas uniform distribution. Limestone (lime)-gypsum wet desulfurization (WFGD) technology is the mainstream flue gas desulfurization technology worldwide, with the advantages of mature technology, high desulfurization efficiency, stable operation, wide range of coal types, easy-to-obtain absorbent and low price, etc. . It is widely used in flue gas desulfurization in thermal power plants, steel sintering and other industries. Since 2014, the country's environmental protection requirements have been increasing. Wi...

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Problems solved by technology

2) After installation, the position of the flue gas circulation channel of the device is fixed, and it cannot be optimized and adjusted according to the working conditions

This leads to two main disadvantages in the prior art: 1) While the flue gas equalization effect is achieved, the flue gas resistance is relatively large, resulting in an increase in energy consumption of the system

2) The flue gas flow equalizer cannot be well applied to occasions with special-shaped flue gas flow cross-sections or small cross-sections (that is, occasions where the blind plate area is too large)

3) The flow field of the side-out absorption tower is relatively complex, which is different due to the angle between the outlet and the inlet, and generally the flue gas flow near the outlet side will be too large

Generally speaking, the device and method have poor effects on the uniform distribution of smoke, especially the adjustment effect on the uniform distribution of smoke is inconvenient and unsatisfactory

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