Descaling agent for leachate anaerobic system and preparation method of descaling agent

Abstract

The invention relates to the technical field of landfill leachate treatment, and in particular, relates to a descaling agent for a leachate anaerobic system and a preparation method of the descaling agent, wherein the descaling agent comprises the following raw materials in parts by weight: 5-15 parts of hydrochloric acid, 1-5 parts of citric acid, 1-6 parts of EDTA, 0.4-3.5 parts of amino trimethylene phosphonic acid, 0.5-3.5 parts of a corrosion inhibitor, 0.3-0.6 part of sodium dodecyl sulfate, 0.9-1.8 parts of sodium hexametaphosphate and 45-180 parts of water. The hydrochloric acid, the citric acid, the EDTA and the amino trimethylene phosphonic acid are used in cooperation, cleaning of a pipe network and the interior of a UASB pool can be accelerated, removal of water scales is facilitated, the descaling time is shortened, and the descaling rate is effectively increased; by using the corrosion inhibitor formed by combining hydroxyethylidene-1,1-diphosphonic acid and polymaleic acid, the corrosion of the acidic descaling agent to the surface of equipment in the descaling process is effectively prevented; and by using a dispersing agent formed by combining sodium dodecyl sulfate and sodium hexametaphosphate, the water scales after stripping can be effectively prevented from being agglomerated and precipitated, so that the water scales after stripping is prevented from blocking the pipe network, and potential safety hazards are avoided.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a scale remover used in an anaerobic leachate system and a preparation method thereof. Background technique [0002] During the process of stacking and landfilling garbage, due to biochemical degradation such as compaction and fermentation, and at the same time, a liquid with high concentration of organic or inorganic components is produced under the seepage of precipitation and groundwater, which we call landfill leachate. Also called leachate. There are many factors affecting the production of leachate, mainly including the rainfall in the landfill area, the nature and composition of the waste, the anti-seepage treatment of the landfill, and the hydrogeological conditions of the site. [0003] Due to the high suspended solids, salinity, alkalinity, slightly soluble salt, heavy metal ions, etc. in the leachate, anaerobic comprehensive reaction occurs in the ...

AI Technical Summary

Problems solved by technology

[0003] Due to the high suspended solids, salinity, alkalinity, slightly soluble salt, heavy metal ions, etc. in the leachate, anaerobic comprehensive reaction occurs in the UASB pool, and COD forms a large amount of alkalinity during the degradation process, which increases the pH value and temperature rise, etc. Factors, the stable conditions of slightly soluble salts are broken, and countless black crystal nuclei are rapidly precipitated, and grow into crystal grains, and finally form extremely hard black crystals, which block the pipe network and destroy the basic conditions for the stability of anaerobic reactions. The black crystals The main components are magnesium ammonium phosphate hexahydrate, calcium carbonate, magnesium carbonate, calcium sulfate, etc. The original descaling is soaked in acidic solution, but in order to ensure the cleaning effect, most of the cleaning has been cleaned by pipe network circulation; In the process, the peeled scale will settle in the pipeline. Due to the limitation of the diameter of the pipeline and the limitation of the elbow, etc., there are safety hazards such as blockage of the pipeline and local overheating.

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