Wet-process desulphurization gypsum drying treatment device

Abstract

The invention relates to a wet-process desulphurization gypsum drying treatment device which comprises a drying cylinder. The bottom of the drying cylinder is provided with a base plate arch-breakingtriangular plate, a stirrer is arranged above the arch-breaking triangular plate, a high-temperature smoke inlet is formed in the position, located at the height of a stirrer, of the side wall of thedrying cylinder, and a wet gypsum inlet is formed above the high-temperature smoke inlet, the top of the drying cylinder is provided with a high-temperature smoke outlet, and the high-temperature smoke outlet is connected with a dust removal device. Smoke entering the high-temperature smoke inlet contains tar or pitch high-temperature coke oven smoke. The wet-process desulphurization gypsum dryingtreatment device cooperates with high-temperature smoke to dry and dewater wet gypsum with the moisture content higher than 15%, meanwhile moisture and dust are both discharged outward together withthe high-temperature wet smoke, then dust is collected, and two purposes are achieved in one. Existing high-temperature coke oven smoke is utilized, energy is saved. Meanwhile, the zero-discharge function of wastewater is achieved.

Description

technical field [0001] The invention relates to a wet gypsum drying treatment device, in particular to a wet desulfurization gypsum drying treatment device. Background technique [0002] Limestone / lime-gypsum wet desulfurization is a widely used desulfurization method with high efficiency, reliability, stability, safety and low operating cost. It has long been the most important method for flue gas desulfurization of thermal power coal-fired boilers. Due to the single fuel, sufficient boiler combustion, and high dust collection efficiency of subsequent dust removal equipment, after entering limestone / lime-gypsum wet desulfurization, the gypsum slurry formed after full oxidation is dehydrated through various forms of vacuum or plate and frame, and the gypsum contains water. The rate is generally around 10%. [0003] At present, limestone / lime-gypsum wet desulfurization has begun to be applied to the desulfurization treatment of coke oven flue gas, steel sintering machine tai...

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Problems solved by technology

[0003] At present, limestone / lime-gypsum wet desulfurization has begun to be applied to the desulfurization treatment of coke oven flue gas, steel sintering machine tail gas, steel pellet tail gas and various rotary kiln, mineral kiln, calcination, roasting and other tail gases. The raw materials are diverse and mixed, the combustion methods and working conditions are diverse and complex, and before entering the limestone / lime-gypsum wet desulfurization system, the dust removal effect is not good or the dust removal effect is poor, resulting in high dust concentration at the entrance of the limestone / lime-gypsum wet desulfurization system, containing tar or Asphalt dust is very high, and when encountering a lot of desulfurized gypsum, it cannot be dehydrated well, and the moisture content is too high, or even cannot be crystallized effectively, and the phenomenon of "loosening" directly occurs

[0004] In the prior art, such wet gypsum with high moisture content is directly transported and stacked. On the one hand, it increases the difficulty of handling. On the other hand, the wet gypsum with high humidity also affects the aesthetics of the factory environment.

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