RU43791U1 - INSTALLATION OF RECEIVING MICROSPHERES FROM FLYING ASH - Google Patents

Abstract

The utility model relates to equipment for the separation of ash and slag, in particular, fly ash in order to obtain a microsphere, which is used as a filler in the production of various composite materials. The essence of the technical solution is to simplify the technological scheme by introducing into the known installation, including a fly ash recovery unit, a fluidized bed separator and receiving hoppers of an additional air separation unit and microsphere classification. As a result, a microsphere flotation and drying unit is not required to obtain a microsphere, which greatly simplifies the technology for producing a microsphere.

Description

Installation for producing microspheres from fly ash.

The utility model relates to equipment for processing ash and slag waste from thermal power plants. Among the products formed during the combustion of coal, microspheres are very promising, which are formed as a part of ash - entrainment as a result of the melting of mineral components during coal combustion, subsequent crushing of the melt in the gas stream into individual tiny droplets and inflating the latter due to gas inclusions.

Due to their spherical shape and low density, microspheres are used as fillers for plastics, paints, electrical insulating materials, etc. The introduction of microspheres into these materials reduces their density, increases the compressive strength and resistance to various deformations, improves electrical, heat and sound insulation properties.

The microsphere can be obtained as a result of "wet" or "dry" methods of selection of fly ash.

A known installation for producing microspheres (Certificate for PM No. 19269. Installation for producing microspheres from "fly" ash. Bull. No. 23 from 08/20/2001), where an aqueous suspension of fly ash is sent to hydroseparation. Surfaced microspheres are separated and sent for drying.

Close to the proposed utility model is a plant for producing microspheres from dry fly ash (Roask E. Cenospheres from dry ash // Journal Institute Fuel. - 1968. - v. 41, N332. - pp.339-344.). The installation consists of a magnetic particle separator, a fluidized-bed separator for separating microspheres from the heavy part of the ash, a flotation separator for cleaning microspheres from impurities, and a dryer for drying microspheres.

According to the first method, as a result of wet ash and slag removal, the microsphere is obtained at ash dumps, separating it by hydroseparation from slag and fly ash. After that, they are dried. The disadvantage of this method is seasonality, since the separation of microspheres by hydroseparation is possible only if the temperature is positive at a positive temperature.

In the second method, the dry and wet methods are combined. After the selection of dry fly ash, the microsphere is separated from the heavy part of the fly ash in a fluidized bed separator, then it is separated from impurities by hydroseparation (flotation) and dried. The combination of both methods only complicates the process of obtaining microspheres.

The objective of the utility model is to simplify and increase the efficiency of the process of obtaining microspheres. This problem is solved by introducing into a known installation, including node capture volatile

ash, fluidized bed separator and receiving hoppers of an additional air separation and microsphere classification unit, and the output of the fly ash collecting unit through a feeding device is connected to the input of the fluidized bed separator, the upper output of which is connected to the inlet of the air separator, and the output of the air separator is connected to the inputs of the receiving hoppers .

Figure 1 shows a schematic diagram of the installation, which consists of an ash collecting device (1), a hopper for collecting fly ash (2), a fluidized bed separator (3), an air separator-collector (4), an air classifier (5), and receiving bins (6.7).

The proposed installation works as follows. When flue gases pass through the ash collector, fly ash is captured and fed to the hopper, from where it is fed by a screw batcher for separation in a fluidized bed. Here, the light part of the fly ash - the microsphere is blown away. The heavy part of the ash is removed from the bottom of the fluidized bed separator and then conveyed by the conveyor for shipment. The light part of the microsphere on top of the fluidized bed installation enters the air separator to separate the microspheres from impurities. The microsphere is fed from the separator by a screw feeder to the size classification unit. After classification, microsphere fractions are collected in silos.

The advantage of the proposed utility model is that the installation can be placed directly on the territory of the power plant. To obtain a microsphere does not require a flotation unit and drying the microspheres, which greatly simplifies the technology of obtaining microspheres.

Claims (1)

Installation for producing microspheres from fly ash containing a fly ash recovery unit, a fluidized bed separator, receiving hoppers, characterized in that it is equipped with a series-connected air separator and classifier, the output of the fly ash recovery unit through a feeding device connected to the input of the fluidized bed separator, the upper the output of which is connected to the inlet of the air separator, and the output of the latter through the air classifier is connected to the inputs of the receiving bunkers.