A pickling sludge dewatering device

Abstract

The invention discloses a pickling sludge dehydration device, comprising a dehydration chamber, the main body of the dehydration chamber is in the shape of a "chamfered platform", and the inner cavity of the dehydration chamber is provided with A spiral conveyor belt is equipped, a magnetron is arranged in the middle of the bottom of the inner cavity of the dehydration chamber, a vertical waveguide is connected above the magnetron, and a dehydration device is fixed directly above the output end of the waveguide. The microwave stirrer on the top of the chamber, the input end and the output end of the conveyor belt pass through the feed port and the discharge port of the dehydration chamber respectively, and the bearing surface of the conveyor belt is arranged obliquely and faces the waveguide and the microwave stirrer. The invention dehydrates the pickling sludge by means of microwave heating. The mud plate absorbs the microwave energy, thereby continuously increasing the temperature, and at the same time, the water in the mud plate is evaporated, thereby achieving the effect of dehydration, reducing environmental pollution and damage to the land occupy.

Description

technical field [0001] The invention relates to a pickling sludge dewatering device, which belongs to the technical field of pickling sludge resource recovery. Background technique [0002] Pickling is an important process in the metal surface treatment industry and the steel industry. Through pickling, remove iron oxide on the surface of steel or metal processing products, improve the quality of steel surface structure, and make the metal surface clean. The remaining pickling waste liquid after pickling needs to be treated to a certain extent before it can be discharged. The most commonly used method is the lime neutralization method, which directly adds slaked lime to the wastewater. This method will produce a large amount of sludge, which has high metal ion content and is difficult to follow-up treatment. It is a hazardous solid waste and occupies a large amount of land area. Recycling of pickling sludge is becoming more and more important. Pyroreduction is currently t...

AI Technical Summary

Problems solved by technology

At present, factories generally use two methods for drying and dehydrating pickling sludge, one is the natural air drying method, and the other is the rotary kiln method. The natural air drying method requires a large amount of drying space and the dehydration speed is slow, which is easy to generate dust , the rotary kiln method has high energy consumption and will produce a large amount of greenhouse gases and sulfur dioxide

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