Descaling agent for brine transportation pipeline, as well as usage method thereof

Abstract

The invention discloses a descaling agent for a brine transportation pipeline. The descaling agent comprises the following raw materials in parts by weight: 15-20 parts of ethylenediamine tetraacetic acid disodium, 20-35 parts of nitrilotriacetic acid, 10-20 parts of sodium hydroxide and 8-15 parts of sodium chloride. A usage method of the descaling agent comprises the following steps: mixing the descaling agent with a defoaming agent and water according to a weight ratio of (1-1.2):(0.1-0.15):1000 to obtain a mixed liquid, and enabling the mixed liquid to be always in a flowing state in a to-be-cleaned brine transportation pipeline by adopting a single-pipe circulating technology or a two-pipe circulating technology, so that the scale dissolving effect of the mixed liquid can be improved. Based on the complexing principle, gypsum scale layers can be removed by the descaling agent, the descaling agent is convenient and safe to use, the descaling efficiency is high, the descaling quality is good, especially the gypsum scale layer in a mirabilite brine transportation pipeline can be entirely eliminated, the damage of the traditional acid pickling to the pipeline can be solved, the construction period is short, and the production of enterprises is hardly affected.

Description

technical field [0001] The invention relates to a descaling agent and a using method thereof, in particular to a descaling agent and a using method thereof for removing scale layers of brine pipelines, and belongs to the field of chemical industry. Background technique [0002] During the production and transportation of rock salt brine, with the prolongation of use time, scaling will form on the inner wall of the brine transportation pipeline to form a layer of scale layer to hinder the circulation of brine. Scaling in the brine pipeline will cause a decrease in output, or even blockage of the pipeline, which will cause huge economic losses, especially for long-distance pipelines. Therefore, it is necessary to descale the brine pipeline. At present, pipeline descaling technology is divided into two types: mechanical descaling and chemical descaling. Mechanical descaling is to use drilling tools, special equipment and water flushing to remove scale. Descaling is often incom...

AI Technical Summary

Problems solved by technology

For the scaling of brine pipelines for Glauber's salt brine, the gypsum scale layer belongs to the crystal growth type scale, which is due to the gypsum (CaSO 4 ) Due to changes in brine temperature, pressure, concentration, etc., the solubility of gypsum decreases and slowly adheres to the inner wall of the pipeline. It contains CaSO 4 2H 2 The composition of O is extremely pure and the content of other impurities is low. As far as the current technology is concerned, there is no systematic and reliable chemical descaling agent to deal with it except for the mechanical crushing method. The traditional pickling method is due to the The content of gypsum is very high, and the excess acid is very harmful to the chemical reaction of the pipe

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