Pickling sludge dewatering device

Abstract

The invention discloses a pickling sludge dewatering device, and the device comprises a dewatering chamber; a main body of the dewatering chamber is in an inverted pyramid frustum shape, a spiral conveying belt matched with the inner wall of the dewatering chamber is arranged in an inner cavity of the dewatering chamber from top to bottom, a magnetron is arranged in the center of the bottom of the inner cavity of the dewatering chamber, a vertical waveguide tube is connected to the upper portion of the magnetron, a microwave stirrer fixed to the top of an inner cavity of the dewatering chamber is arranged over the output end of the waveguide tube, the input end and the output end of the conveying belt penetrate through a feeding port and a discharging port of the dewatering chamber respectively, and the bearing face of the conveying belt is obliquely arranged and faces the waveguide tube and the microwave stirrer. The pickling sludge is dewatered in a microwave heating mode, the sludge plate absorbs microwave energy, so the temperature is continuously increased;meanwhile, water in the sludge plate is evaporated, the dewatering effect is achieved, and environmental pollution and land occupation are reduced.

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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