SU1361330A1 - Method of preparing suspension of vegetable fibrous initial material - Google Patents

Abstract

This invention relates to peat extraction. The goal is to intensify the process and increase the kinetic stability of the peat suspension. The method of preparing a suspension of vegetable fiber raw material involves the development of peat deposits with obtaining raw materials of increased moisture content and preparing the material with a moisture content of 65-75% for heat treatment, in the soil process of which there is a separation of impurities with simultaneous heating of the raw material with heated air. Then the raw material heated to 30-40% is mixed with ode to a humidity of 75-85% and continuously heated with steam to 90-95 ° C, utilizing the heat in the production process. Then blown with steam under pressure with higher parameters and heated to a predetermined temperature, for example 150, depending on the selected technological mode. The coolant is used as a transporting agent for feeding the heated material into the reaction volume, where the heated mass is kept for 2-4 hours. The resulting suspension is removed from the system under pressure in a fluid state With a flow factor of 650-900%. The prepared suspension is exposed to an ultrasonic field by directing the kinetic energy of the jet to the resonator. The oscillation frequency of the jet is equal to the natural frequency of the resonator. 1 hp ff. W O) 05 00 00

Description

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The invention relates to the field of peat extraction of increased moisture by the milling method and year-round processing under factory conditions, in particular, to methods for preparing peat suspensions, to reduce the dependence of peat production on weather conditions and increase the reliability of supplies to consumers of various peat products, including raw materials for fodder production.

The purpose of the invention is to intensify the process and increase the kinetic stability of the peat suspension.

The method of preparing the suspension involves the development of a peat deposit with the production of raw materials of increased moisture, the preparation of material with a moisture content of 65-75% for heat treatment, containing separation of extraneous inclusions (stumps, metal, stones, etc.) with simultaneous heating of the raw material, heat treatment under steam pressure up to 150-160 ° C in suspension and subsequent aging of the mass in the reaction volume, as well as continuous withdrawal of the finished suspension from the system under pressure, while prior to heat treatment, the raw material is mixed with the working fluid; the suspension is withdrawn from the system at a pressure in the fluid state with a fluidity ratio of 650-900%, the suspension is subjected to ultrasonic field by directional effect of kinetic energy of the jet emitted from the reactor for re

Zoner, water is used as a working fluid, organic matter of peat is used as a suspension, the suspension fluidity is changed by holding the mass in the reaction volume, and the oscillation frequency of the jet ejected from the reaction volume is chosen equal to the natural frequency of the resonator.

The essence of the method is as follows.

The peat deposit is developed in established calendar terms by layer-by-layer excavation according to a known technological scheme, using the existing technological equipment. In this case, food is used (dry drying and the raw material is removed by moisture of 65-72% in caravans for long-term storage. Then wet

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All year round peat is supplied to the plant in narrow gauge wagons. In the factory, the raw materials are prepared for the technological process and for this purpose they are rinsed with heated air and extraneous inclusions are separated from the material, including metal, stones and stumps. In this case, crushing of frozen peat is carried out in winter. Next, the raw material heated to 30-40 ° C is mixed with water to a moisture content of 75-85% and is continuously heated first with secondary steam to 90-95 ° C, utilize the heat in the production process, then blow off with pressurized steam with higher parameters and heat to a predetermined temperature. ,

0

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Perurature, for example, up to 150-160 C, depending on the selected technological mode. This combines the use of coolant as a transporting agent to supply the heated material to the reaction volume, which is used to hold the heated mass for 2-4 hours, depending on the temperature, to ensure the maximum yield of Sugars in the aqueous solution and reduce the water binding to the solid peat phase . The suspension obtained in the reaction volume by hydrolysis removes from the system under pressure in the form of a jet directed to the resonator (plate mounted in the plane of the jet) under an excess pressure of 0.5-1.0 MPa and higher. When a suspension is supplied in the form of a jet, ultrasonic vibrations occur on the plate edge. Frequency

0 oscillation is determined by the ratio

0

f V / L,

where v 5

jL

flow rate of the suspension from the nozzle, cm / s; the distance of the free jet outflow from the nozzle exit section to the plate edge (resonator), see 5 formula.

Under the influence of an ultrasonic field, a finely dispersed suspension is formed with solid particles of micron size, close to spherical shape, with higher kinetic stable properties and lower viscosity.

Claims (2)

1. A method of preparing a suspension from vegetable fiber raw materials, including the development of a peat deposit with obtaining a raw material of high humidity, preparing a material with a moisture content of 65-75% for heat treatment, containing separation of impurities with simultaneous heating of the raw material, heated air, heat treatment with steam wiper 150 under pressure up to 160 ° C in suspension. holding it in the reaction volume and the subsequent issuance of the finished suspension Q 5 0 From a pressurized system, characterized in that, in order to intensify the process and increase the kinetic stability of the peat suspension, the raw material is mixed with the working fluid and the ready suspension is removed from the pressurized system in a fluid state with a flow factor of 650-900%, and the finished The suspension is exposed to an ultrasonic field by directing the kinetic energy of the jet to the resonator, and the oscillation frequency of the jet is assumed to be equal to the natural frequency of the resonator. 2. Method POP.1, characterized in that water is used as the working fluid.