Twin-tower wet-type sodium alkali-method desulfurization dust-removing device and process

Abstract

The invention belongs to the small and medium-sized boiler smoke dust desulfurization dust-removing technology field, aims to solve current situations that smoke dust in discharged flue gas is relatively high, sulfur emissions do not reach standards and the desulfurization and dust-removing efficiencies are low are caused by insufficient combustion of high-sulfur coal used in an ordinary boiler of a conventional desulfurization dust-removing device, and provides a twin-tower wet-type sodium alkali-method desulfurization dust-removing device and a process. The desulfurization dust-removing device comprises a dust-removing tower connected with a boiler, a desulfurization tower provided with spray heads, an induced draft fan connected with the dust-removing tower and the desulfurization tower, and a three-stage sedimentation tank connected with the bottom of the desulfurization tower. The desulfurization dust-removing device is applied to small and medium-sized boilers, has the desulfurization efficiency of more than 98% and the dust removal efficiency of more than 97%, has low operation cost, adopts flanges each clamped with an asbestos rope to connect the dust-removing tower and the desulfurization tower with a smoke flue, and is convenient for disassembly and cleaning and replacement of the smoke flue, the dust-removing tower and the desulfurization tower; and water retaining plates are respectively arranged in the dust-removing tower and the desulfurization tower, waste water is prevented from corroding the dust-removing tower and the desulfurization tower after entering, the smoke flue is immersed in water of the dust-removing tower, and the use of the spray heads further improve the dust-removing and desulfurization effects.

Description

technical field [0001] The invention belongs to the technical field of flue dust desulfurization and dust removal of medium and small boilers, and in particular relates to a double-tower wet sodium-alkali method desulfurization and dust removal device and a process. Background technique [0002] In today's rapid economic development, with the continuous improvement of people's economic level, the requirements for the environment are becoming more and more strict. At present, wet flue gas desulfurization and dust removal are commonly used in industry. This method of desulfurization uses interstitial liquid absorbent to wash SO 2 The flue gas is absorbed by chemical reaction to remove SO in flue gas 2 , the disadvantage is that the flue gas temperature after desulfurization is low, which is not conducive to chimney exhaust and diffusion. The addition of desulfurization agents is artificial, which is unscientific and wastes desulfurization agents, which increases operating cos...

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Problems solved by technology

[0004] In order to solve the current situation that the existing desulphurization and dust removal devices use high-sulfur coal for ordinary boilers for insufficient combustion, resulting in high smoke and dust in the discharged flue gas, substandard sulfur emissions, and low desulfurization and dust removal efficiency, the present invention provides a double-tower wet-type sodium Alkali desulfurization and dust removal device and process

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