Environment-friendly steel wire pickling bath

Abstract

The invention discloses an environment-friendly steel wire pickling bath which comprises a water circulating device and an acid liquor circulating device. The pickling bath consists of a plurality of horizontally arranged pickling pipelines, and the pickling pipelines consist of PE (Polyethylene) pipes. A UHMV-PE (Ultra High Melt Viscosity-Polyethylene) layer is arranged on the inner wall of each pickling pipeline, acid adding pipes are uniformly connected at intervals on the top faces of the pickling pipelines, and the acid adding pipes are communicated with the acid liquor circulating device. Both ends of each pickling pipeline are respectively connected with a liquor collecting tank, a steel wire drawing device is arranged in the liquor collecting tank, and a steel wires pass through the pickling pipelines and the steel wire drawing devices in the two liquor collecting tanks. An acid return tank and a water return tank are also arranged in the liquor collecting tank, the acid return tank is communicated with both ends of the pickling pipeline, and the bottom face of the acid return tank is connected with the acid liquor circulating device through an acid return pipe. A water spray device for spraying water to the surfaces of the steel wires is arranged above the water return tank, the water spray device is connected with the water circulating device through a water inlet pipe, and the bottom face of the water return tank is connected with the water circulating device through a water return pipe. The top faces of the two liquor collecting tanks are respectively connected with air exhaust pipes.

Description

technical field [0001] The invention belongs to the improvement of the pickling tank structure for a continuous galvanizing line, and relates to an environment-friendly steel wire pickling tank. Background technique [0002] At present, the same type of steel wire galvanizing production line in China generally adopts a sealed pickling tank. The pickling tank is designed in a closed form and is divided into two parts: the tank body and the sealed upper cover plate. Install an exhaust device on the cover plate to form a local negative pressure in the pickling tank to prevent the acid mist from overflowing. At the same time, layered water curtains are set at the steel wire inlet and outlet at both ends of the pickling tank to prevent the acid mist in the pickling tank from overflowing from both ends. If the steel wire breaks due to a fault during operation, the steel wire will be re-passed through a special threading slider. After the steel wire passes through a closed tank, ...

AI Technical Summary

Problems solved by technology

[0004] (1) The seal is prone to failure

[0005] The sealing upper cover and the tank body are made of PP material, which is easy to age and deform, resulting in a loose seal between the upper cover and the tank body, resulting in gaps; and because the upper cover and the tank body are connected by steel bolts, it is very easy to Corrosion in the environment causes the fastening failure of the connection and the formation of local voids

Due to the above reasons, acid mist will overflow from these gaps, causing environmental pollution

[0006] (2) The wire threading process is complicated

From the statistics of production, the average number of thread breaks per shift (8 hours) is 8 times, and the threading time is about 15 minutes each time, so the time loss caused by thread breakage and rethreading is about 120 minutes, which seriously affects production Continuity and effective operation rate

[0008] (3) The acid tank is easily damaged

[0010] (4) Difficult to maintain

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