SU441469A1 - Dust meter - Google Patents

Description

one

The invention relates to a technique for measuring the amount of dust in gases and can be used in industrial ducts through which dusty gases are removed from units operating on finely ground materials, such as rotary cement treatments, cement mills, etc. ".

A weight (gravimetric) dust gauge is known, which takes a sample from a gas flue, precipitates dust from it in a cyclone and then weighs the residue on the balance. Removing the suspended sediment from the weighing pan is also very difficult.

The purpose of the invention is to simplify the design and increase the reliability of the device,

The goal is achieved by the fact that in the proposed dust meter the weighing cup is made in the form of a cylinder with two pallets: fixed, made in the form of a cone and installed in a cylinder with a gap, and movable, made in the form of a cylinder connected to a compressed air supply system.

FIG. 1 shows schematically the proposed G: dust meter in the sampling phase, longitudinal section; in fig. 2 - the same in the weighing phase; in fig. 3 - in the phase of removing dust; in fig. 4 shows a scale without moving pallet, vertical section; in fig. 5 is a section along A-A in FIG. four.

The proposed dust meter contains a dust collection tube 1, an ejector-flow booster 2, a cyclone 3, a scale 4, an air valve 5, a fixed pan 6, a movable pan 7. The fixing of the fixed pan is shown in detail in FIG. four.

The entire cycle of the dust meter is divided into three phases; phase of sampling and sedimentation of dust from it, phase of weighing and phase of removal of suspended dust.

In the first phase, the dust meter works as follows. Compressed air is fed to an ejector, a flow stimulator, which, creating a vacuum in the cyclone, sucks the dusty gas from the gas duct through a dust collection tube. Dust is released in the cyclone and is deposited in the weighing pan, whose basement pan is pressed tightly through the gasket to the weighing pan, sealing the cyclone-cup system (Fig. 1). The hole in the movable tray through a flexible pipe (for example, polyethylene) is connected to a sealed cavity of the air valve 5.

In the second phase (Fig. 2), the supply of compressed air to the electric motor is stopped, the movable pallet is lowered, and the weighing pan is in the discharge position.

In the third phase (Fig. 3), dust is removed. At this moment the moving pallet

again pressed against the cup of the slides, which in turn presses against the cyclone. The compressed air is supplied to the ejector-flow booster, the air valve 5 is activated, and the compressed air enters the cavity of the movable pallet, from which, through the gap between the cup cylinder and the fixed pallet, rushes out of the cylinder 3 through the exhaust port and through the dust collector , carries away particles of suspended dust.

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The subject of the invention is a dust meter consisting of a dust collecting tube, a cyclone, an ejector, a flow driver, a balance, and is distinguished by the fact that, in order to simplify the design and increase the reliability of the device, the weigh cup is made in the form of a cylinder with two pallets: fixed , made in the form of a cone and installed in the cylinder with a gap, and movable, made in the form of a cylinder connected to the system of compressed air supply.

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