Pyrolytic carbonization device and method for steel rolling oil sludge treatment

Abstract

The invention provides a pyrolytic carbonization device and method for steel rolling oil sludge treatment. A steel rolling oil sludge carbonization device is improved on the basis of the patent with publication number CN107963796A and mainly comprises a feeding device, a pyrolytic carbonization device arranged in a casing, a cooling device, a combustible gas treatment device, a temperature detection element, an electrical control system, a waste heat recovery device and a tail gas treatment device. On the basis of scientific and safe treatment of the steel rolling oil sludge and utilization ofheat contained in organic components of the steel rolling oil sludge and 90% or more of a material reduction rate, the pyrolytic carbonization device and method have the advantages that by means of optimization for carbonization main device structures, including structures and number of carbonization pipes, spiral shafts and the like, the cavity area of a carbonization furnace is increased, movement resistance is reduced, and adhesion, scaling and the like caused by mixing of large-particle ash residues and small-particle ash with tar gas in a long-term carbonization process are prevented andrelieved.

Description

technical field [0001] The invention relates to the technical field of pyrolysis sludge treatment, in particular to a pyrolysis carbonization device and method for treating steel rolling sludge. Background technique [0002] The rolling oil and emulsion used for cooling and lubrication in the cold rolling industry will undergo deterioration and separation under long-term high-temperature rolling, and then be separated by the process lubrication and filtration system of the steel rolling equipment to form waste sludge—steel rolling sludge. Once fermented, the original microorganisms in the steel rolling sludge expand in volume and have an odor. Long-term stacking will damage the soil and water bodies, causing great harm to the environment. The Ministry of Environmental Protection has listed it as a hazardous waste, numbered HW08. [0003] At present, small and medium-sized iron and steel enterprises generally use the transfer method to transfer oil sludge to units with hazard...

AI Technical Summary

Problems solved by technology

[0005] However, in long-term actual production, it is found that steel rolling sludge is generally viscous, especially after long-term storage, the water in the sludge gradually evaporates, the fluidity of the sludge decreases, the viscosity increases, and the power required for feeding increases; at the same time, the organic matter The pyrolysis of pyrolysis is a complex process, which will produce large sticky ash, small particles of dust, etc. within a certain period of time. The tar gas generated during the mixed reaction process will continue to accumulate during long-term operation, making the inner wall of the carbonization tube and The pyrolysis gas burner is gradually blocked, resulting in a smaller reaction space for the material, fouling and dust accumulation at the bottom of the tube wall, and the heat transfer effect of the carbonization tube is also deteriorated, making it difficult to heat up the reaction space, increasing energy consumption, and increasing mechanical wear ( Shaft end bearings are relatively prominent), serious cases may even cause reaction material blockage, screw stuck shaft, etc., lighter ash will enter the waste heat recovery device with the wind and smoke, and adhere to the heat exchanger surface of the waste heat recovery device. The load of the long-term operation unit As the heat transfer and rolling oil sludge treatment effect will become worse, it is necessary to frequently clean the inner wall of the carbonization furnace, bearings, waste heat recovery devices and other easy-to-fouling heating surfaces, which increases the labor intensity and maintenance costs required for maintenance.

Images