SU370138A1 - ALL-UNION - Google Patents

Description

INSTALLATION FOR DOWNLOADING POWDERED MATERIALS IN THE PNEUMATIC TRANSPORT SYSTEM

one

The invention relates to a pneumatic transport and is intended for the loading of powdered materials into a pneumatic transport system followed by their submission to a high pressure environment, such as blast furnaces. Powdered reagents can be blown at high hydrodynamic pressures, for example, into ladles and baths of steelmaking units. The invention can also be used to mix the proportions of dissimilar bulk materials and their further transportation and one dust pipe each, for example for simultaneously blowing fluxing, desulfurizing agents and pulverized solid fuels into blast furnaces.

Installations for loading powdered materials into a pneumatic transport system are known, consisting of single-chamber pneumatic pumps equipped with aero-elements, weighing systems and devices for introducing filling gas. However, these plants cannot provide continuous transportation of dissimilar materials coming from several bunkers, and ensure the preparation of the mixture in a given weight ratio of components. They lack the means to regulate the air supply to both the lock and the mixing chambers and cannot regulate their performance.

The aim of the invention is to provide continuous delivery to the pneumatic conduit of a given amount of material or a mixture of it in a given weight ratio of components for their transportation in a gas stream.

This is achieved by the fact that the pneumatic pumps of the installation are mounted into a single system of several by the number of components of a mixture of controlled pneumatic pumps, to one of which - a continuous pneumatic pump - all the others are attached for a periodic, simultaneous loading of the material. The continuous pneumopump, whose weighing system is blocked with a gas flow regulator for its own aero elements and with the mechanism for switching on and off the supply of filling gas to sluice pneumatic pumps, nabzhennye relay pressure regulator and the gas flow rate at .mi aeroelementy, interlocked with their weighing systems.

FIG. 1 shows schematically the proposed installation; FIG. 2 - graphs of the “material weight” of the material. In the pneumatic pump of a 1DY1ST1VI pneumatic pump and, in one of the lock air pumps, depending on the time.

The installation consists of two or more controlled chamber pneumatic pumps 1 installed in a single system, one of which is a continuous pneumatic pump, and the other sluice pneumatic pumps are used for periodic, simultaneously produced by the continuous pneumatic pump materials. Air cells 2 are installed in the chambers of the pneumatic pumps to aerate the material entering the chambers by means of loading devices 3 equipped with shut-off valves 4. Nozzles 5 are installed in the chambers of the pneumatic pumps, which are supplied via pipeline 6 supplied with a flow meter with a valve 7 and the gas supply to the aero-elements is via pipeline 8 with a flow meter and gas flow controller 9.

The delivery of materials from the chambers of the pneumatic pumps is carried out through outflow pipes 10 installed in each chamber and equipped with intake devices. At the same time, the outlet tube of the continuous pneumatic pump chamber is connected to the pipeline 12 of the pneumatic conveying system, and the outlet pipes of the chambers of the sluice pneumatic pumps are connected to the continuous pneumatic pump chamber by the pipeline 13 equipped with a shut-off device 14 and a check valve 15.

The chambers of all pneumatic pumps are also equipped with indexes 16 of the upper and lower levels of materials, as well as weighing systems 17 interlocked with regulators 9 of gas flow to their own aero elements 2. The weighing system of a continuous pneumopump is blocked with a mechanism 18 for switching on gas for filling sluice chambers that are equipped with a pressure switch 19, interlocked, in turn, with a mechanism 20 for switching off the filling gas when a predetermined pressure is reached in the chamber and regulator 21 stroke for simultaneous incorporation aeroelementy gas in the sluice chambers.

To discharge the excess carrier gas into the line, the continuous pneumatic pump chamber has a pipe 22 with a check valve 23 and a pressure regulator 24. A backflow valve 25 is also installed on the outlet pipe 10 of the continuous pneumatic pump chamber. To quickly fill this chamber with gas at the beginning of the material delivery cycle, a filling pipe 26 is connected to the chamber to achieve a predetermined mass flow through the pneumatic conduit mass. additional gas connected

pipe 27 is connected to it. Thus, a continuous pneumatic pump is constantly under pressure and discharges the material or its mixture continuously. It is loaded using one or several simultaneously but cyclically working sluice pneumatic pumps in the process of dispensing material. During loading, the pressure in the chambers of the sluice pneumatic pumps exceeds

the pressure in the pneumatic pump is continuous, but they are loaded at atmospheric pressure.

All operations in the installation are carried out in the following sequence.

Before starting the installation, the continuous pneumopump is loaded with one material or with a mixture of them at atmospheric pressure. After loading, the chamber is sealed, and B (turn on the gas supply to the aero-elements 2, set the flow rate corresponding to a given performance. At the same time, gas is quickly fed through the nozzle 5 and filling pipe 26 to quickly increase the pressure in the pneumatic pump chamber. and filling, the pipeline is stopped.

Thereafter, the dispensing of material 17, which is fixed by the weighing system, begins.

(or a mixture of it) but the outlet pipe 10 into the pipeline 12 of the pneumatic transport system (the cyclic graph is shown by line I in Fig. 2). At the same time, the output is for; the luzuku sluice pneumopumps (the cyclic graph is shown by line II in Fig. 2). At that moment, when the weight of a material or a mixture of several materials in the chamber of a pneumatic pump of continuous action reaches a predetermined value, the weighing system 17 of this pneumopump receives a signal to the mechanism 18, which turns on the filling of the filling gas IB Sluice P1 nevmonmon pumps. Upon reaching a predetermined pressure from the pressure switch 19 of each sapular pneumatic pump, a signal is sent to Mwadiam 20, turning off the filler gas supply, and then a signal to the mechanism 21 to turn on the simultaneous gas supply to the air element of all sluice pneumatic pumps. Then

the locking device 14 is opened, and loading of materials into the chamber of the continuous pneumatic pump begins. In this case, the weighing system of each pneumopump fixes the change in the weight of the material.

in its chamber and in case of deviation from the task, the actuator of the regulator 9 gives a signal to the actuator, the flow rate for adjusting the gas flow rate.

Correction of the amount of material delivered by the continuous pneumopump in the process of its loading is carried out by adjusting the gas flow rate of its aero elements depending on the phase between the change in the total weight of the incoming material and the increase in the weight of the material in the pneumatic pump of continuous action.

After the sluice pneumatic pumps are emptied from their weighing system, a signal is received to the gas supply shutdown mechanism on its own aero elements and to the mechanism 21, which turns off the common aerating gas supply after the signals from (Sluice pump systems of all sluice pneumatic pumps). The locking device 14 is not closed, and all sluice pneumatic pumps depressurize and reload. After filling to a certain and each of the weighing system gateway receives a pneumatic signal to the individual switch-on the gas supply aeroelamenty. Then iovtor operation are in the same sequence.

The total capacity of all sluice pneumatic pumps must exceed the capacity of continuous pneumatic pumps, which is achieved by an appropriate calculation of the diameters of the discharge pipes of all pneumatic pumps and adjustable gas flow rate for aeration. Under this condition, in the process of dispensing material from a continuous pneumatic pump, it is simultaneously filled. The gas entering the continuous pneumatic pump during its loading from the pneumatic pumps, as well as the gas displaced from its chamber by the incoming material, is directed to the pipeline 12

pneumotransport system. For this purpose, a continuous pressure regulator 24 is installed on the KBiMepe of a continuous-release pneumatic pump, by means of which excess gas is removed from the chamber through the discharge pipe 22.

Subject invention

Installation for loading powdered materials into a pneumatic conveying system including single-chamber pneumopumps equipped with aero elements, weighing systems and input devices

and additional gas, ogl "" Ayuy {ya (; the fact that, in order to ensure the continuous delivery of a specified amount of a material or a mixture of it in a pneumatic duct,

mounted into a single system of several by the number of components of the mixture of controlled pneumatic pumps, to one of which - a continuous pneumatic pump - everything else is connected for a continuous, simultaneously produced load with continuous pneumatic pump materials, the weight measuring system of which is interlocked with the gas flow regulator on its own aero elements and with the switching mechanism and

switching off the supply of filling gas to sluice pneumatic pumps equipped with pressure switches and gas flow controls for aero elements interlocked with their weighing systems.

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