RU2672380C1 - Method of protection of horizontal drainage from insoluble precipitate formation - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture, and in particular to methods for protecting horizontal drainage from insoluble precipitate formation. To protect the horizontal drainage from insoluble precipitate formation in the cavity of the drain, exhaust gases of the internal combustion engine. New is that simultaneously with the supply of exhaust gases to the cavity of the drain, a fine powder of coal and/or brown coal from thermal power plants is supplied, containing not less than 28 mg/kg of copper. Powder of coal and/or lignite ash of thermal power stations together with the flow of exhaust gases enters the inner surface of drainage pipes and in the cracks of drainage pipes. Copper and calcium carbonate, which are contained in the ashes, block the bacterial process of converting iron compounds into insoluble forms. Iron bacteria die. Process of insoluble precipitate formation stops.

EFFECT: invention compared with similar solutions provides a 42 % reduction in the intensity of drainage creep.

1 cl

Description

The present invention relates to agriculture, and in particular to methods of protection against contamination of horizontal drainage.

There is a method of protecting horizontal closed drainage from ocheration, including the supply of a working medium into the cavity of the drain, described in the book by Eggelsman R. Guidelines for drainage. - M .: Kolos, 1978, p. 189.

The method does not inhibit the activity of iron bacteria. The cavity of the drain from the ocher is cleaned again. The complexity of the work increases.

There is also known a method of protecting an enclosed horizontal drainage from scuffing, including supplying exhaust gas to an exhaust cavity of an internal combustion engine described in the copyright certificate SU No. 1130663. MKI E02B 11/00, published on December 23. 1984, Bull. No. 47.

The disadvantage of this method is the low intensity of the suppression of the activity of iron bacteria due to the insufficient concentration of toxic compounds in the exhaust gases.

From the analysis of the existing level of technology revealed that the technical problem is the entrapment of horizontal drainage.

The technical result that provides a solution to this problem is to reduce the obstruction of drainage, by increasing the intensity of the suppression of the activity of iron bacteria.

The specified technical result is achieved due to the fact that in the method of protecting horizontal drainage from ochering, which includes supplying exhaust gases to the drain cavity of an internal combustion engine, fine powder of coal and / or brown coal ash of thermal power plants containing no less than 28 mg / kg of copper. These compounds have a toxic effect on the vital activity of iron bacteria.

The method is as follows.

, где α - расчетный удельный расход порошка, г/м²; π - 3.14; d - внутренний диаметр дрены, м;

- длина дрены, м. Величину α устанавливают экспериментально для каждого массива осушения на локальных участках дренажных труб. В опыте фиксируют плотность заселения железобактериями внутренней поверхности локальных участков дренажных труб при различных величинах удельного расхода порошка. За расчетный удельный расход принимается величина, обеспечивающая гибель не менее 90% популяции железобактерий. Величина α изменяется от 0.8 до 4.6 г/м². При концентрации в угольной и буроугольной золе тепловых электростанций меди менее 28 мг/кг резко повышается трудоемкость работ, за счет увеличения необходимого объема порошка, вносимого в полость дрены.The mouth of the drain is closed with a plug with a pipe equipped with a tap with a valve and a metering tank. The pipe is connected by a hose to the exhaust pipe of the tractor’s internal combustion engine and exhaust gases are supplied to the drain cavity. The dosing tank is filled with fine powder of coal and / or lignite ash of thermal power plants, the valve is opened and it is fed into the drain cavity. Injection of a gas stream facilitates the flow of powder into the cavity of the drain. The gas supply is stopped when the dispensing tank is completely empty. The dose, M in grams, of coal and / or brown coal ash powder per drain is determined by the following formula

where α is the calculated specific consumption of powder, g / m ² ; π - 3.14; d is the inner diameter of the drain, m;

- the length of the drain, m. The value of α is determined experimentally for each drainage array in the local sections of the drainage pipes. In the experiment, the density of iron-bacteria colonization of the inner surface of the local sections of the drainage pipes is fixed at various values of the specific powder consumption. The calculated specific consumption is the value that ensures the death of at least 90% of the population of iron bacteria. The value of α varies from 0.8 to 4.6 g / m ² . When the concentration in copper and lignite ash of thermal power plants of copper is less than 28 mg / kg, the complexity of the work increases sharply due to an increase in the required volume of powder introduced into the cavity of the drain.

The average particle size of the powder is taken no more than 0.001 mm. With a larger average particle size of the powder, its uniform distribution along the length of the drain is impeded. Reducing the average particle size of the powder increases the complexity of the production of powder of coal and / or lignite ash without a significant increase in the uniformity of its distribution along the length of the drain.

Coal and / or lignite ash powder together with the exhaust gas stream enters the inner surface of the drainage pipes and into the slots of the drainage pipes. The coal and / or brown coal ash powder contains copper and calcium carbonate, which block the bacterial process of converting iron compounds into insoluble forms. Iron bacteria die. The coating process is terminated.

г.Example. The peat massif is drained by closed drainage. The diameter of the drain is d = 0.1 m. The length of the drain is l = 105 m. The value α = 2.3 g / m ^{2 was} established in the local area of drains of the drained massif. Four parts of the drainage array were identified. The dose rate along with the exhaust gases of a mixture of powders of coal and lignite ash, taken in equal proportions per drain was

g.

On the fourth part of the peat massif, only exhaust gases were supplied to the drains. An analysis of the condition of draining of drains in different parts of the drained massif after two years of operation of the drainage showed the following. Using the prototype method when supplying exhaust gases to the drain, the death of iron bacteria was 58%. The proposed method provided 100% death of iron bacteria.

The proposed method of protecting horizontal drainage from tanning compared with the prototype provides a decrease in the intensity of tanning of drainage by 42%.

Claims (1)

A method of protecting horizontal drainage from ocherification, comprising supplying exhaust gases of an internal combustion engine to the drain cavity, characterized in that at the same time as the exhaust gases are supplied into the drain cavity, finely dispersed powder of coal and / or brown coal ash of thermal power plants containing at least 28 mg / kg of copper .