A wood chip washing sewage and flue gas treatment device

Abstract

A treatment device for wood chip washing waste water and exhaust is provided. The treatment device comprises a wood chip washing machine, a collecting tank, at least one drying cyclone separator, a chimney, an induced draft fan, a first waste water sedimentation basin, and a second waste water sedimentation basin. A first spraying mechanism and a second spraying mechanism are disposed in the chimney. The bottom of the chimney is provided with a waste water buffer tank. The first waste water sedimentation basin is connected to the water outlet of the waste water buffer tank through a slag-removing unit. The second waste water sedimentation basin is communicated with the first waste water sedimentation basin, and is connected to the water inlet of the wood chip washing machine through a main pipeline. The main pipeline is provided with a circulating water pump. The second spraying mechanism is connected to the main pipeline through a second branch pipeline. The second branch pipeline is disposed between the circulating water pump and the wood chip washing machine. The treatment device can treat exhaust generated by the drying cyclone separator, and achieves reutilization of the waste water generated by washing wood chips, thus avoiding waste of the water resource.

Description

【Technical field】 [0001] The invention relates to an equipment device in the field of medium-density fiberboard processing, in particular to a wood chip washing sewage and flue gas treatment device. 【Background technique】 [0002] The medium-density fiberboard industry is not only a resource comprehensive utilization industry, but also a resource-dependent industry, and an industry with relatively high energy consumption. The density of medium-density fiberboard is 650-800 kg / m3, the density of high-density fiberboard is ≥880 kg / m3, and the density of low-density fiberboard is 450-650 kg / m3. It is mainly used for interior decoration of buildings, floor substrates, furniture Manufacturing, decoration of vehicles and ships, manufacturing of household appliance casings, and carving of various craft reliefs, etc. [0003] Medium density fiberboard is a plate produced by dry or wet production process with artificial fast-growing small-diameter wood, branch wood, harvesting resid...

AI Technical Summary

Problems solved by technology

The main function of the flash dryer is to quickly dry the wet wood fiber (85%-90% moisture content) applied with glue to the dry fiber with a moisture content of only 8&-15%, so as to facilitate the subsequent pavement molding hot-pressing section. ; Among them, the exhaust gas outlet temperature of the drying cyclone separator is 50°C-75°C, and the emission concentration of exhaust particulate matter is 50mg-175mg / m 3 , formaldehyde emission concentration 5mg-15mg / m 3 , smoke blackness≦1, moisture content≦0.1kg / m 3 , and the air volume is large, reaching 100,000-700,000 Nm 3 / h, the pressure is about 3500-5000Pa, and the wind speed is 8m / s-25m / s; at this stage, the tail gas produced by the drying cyclone separator in the fiberboard industry is directly discharged into the air, thus polluting the air in the environment

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