SU1168660A1 - Method of protecting drains from clogging - Google Patents

Abstract

METHOD OF PROTECTING DREN FROM CLEANING by creating a trench, treating its bottom with an inhibitor, laying pipes and filling it with a backfill soil, characterized in that, in order to increase the efficiency of drainage protection from coking and reduce the laboriousness of the process, coal powder and / or brown coal ash thermal power plants containing at least 25 mg / kg of copper.

Description

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The invention relates to the field of agriculture, in particular to methods for the protection of drains from ingenuity.

The aim of the invention is to increase the efficiency of drainage protection against coagulation and reduce the labor intensity of the process.

The method is carried out as follows.

Example 1. One-bucket excavator is equipped with a trench 0.8-1.0 m deep, 35-45 cm wide. A pneumatic fertilizer sprayer loaded with powdered coal ash of thermal power plants is let in along the trench. The bottom of the trench is cleaned with coal ash powder, then the pipes are laid down and covered with backfill soil. Ash consumption per pitch meter of trench depends on its copper content. It varies from 10 to 100 g with the copper content in the ash, respectively, 500-25 mg / kg. The lower ash consumption value corresponds to the minimum consumption of the fertilizer sprayer.

With an increase in the ash powder consumption of more than 100 g per running meter, the costs of protecting the drainage grow without noticeably increasing its effectiveness.

The effectiveness of the inhibitor increases with decreasing average particle size of the powder. However, reducing the average size of ash particles requires additional

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costs of crushing ash. The greatest effect of applying ash powder is achieved with an average part size in

the interval is 0.5-0.03 mm.

5 Example2. They arrange the trench with a multi-bucket trench excavator, simultaneously lay up the tube, sprinkle it with the backfill soil, and then fill the trench. The trench excavator is equipped with a pneumatic ash supply system to the drainage pipe laying area. On an excavator, a container filled with ash powder, a compressor, air ducts and a nozzle are installed. The nozzle is installed in the hopper. A pressure is created in the container, under the action of which the powder moves to the nozzle and is sprayed across the bottom of the trench. A tube is placed on the treated section of the trench bottom. The excess pressure in the ash powder supply system is set in the range of 0.5-0.6 atm. The vines of the ash powder are used the same as in the first example.

Example 3. A trench is arranged with a multi-bucket drainage excavator. Next to the excavator, a pneumatic fertilizer spreader is moving. The spreader nozzle is placed in the stacker's drainage bin. The spreader and excavator move synchronously. An ash powder is fed to the bottom of the trench through the nozzle into the laying area and at the same time the drainage pipe and all subsequent operations are carried out.

Claims (1)

METHOD FOR PROTECTING DRINES FROM CURCHING by creating a trench, treating its bottom with an inhibitor, laying pipes and backfilling them with backfill soil, characterized in that, in order to increase the effectiveness of protecting the drainage from sintering and reduce the complexity of the process, coal and / or powder is used as an inhibitor lignite ash from thermal power plants containing at least 25 mg / kg of copper.