SU1523499A1 - Unloader of pneumatic plant - Google Patents

Abstract

The invention relates to pneumatic conveying and is intended for use in pneumatic conveying injection installations for separating material from the air transporting it. The purpose of the invention is to increase work efficiency by increasing the degree of purification of the carrier air. The self-regeneration of the filter hoses is carried out by returning air through the hoses at the initial moment after switching on the pneumotransport unit before the valves 8 are opened, balanced by loads, the mass of which is designed for a certain pressure allowed in the settling chamber 2. After the valve 8 is opened, the aerated mixture is recirculated in the system with partial filtering the air through the sleeves of 16 sections 6 and 7 of the filter. When the pressure in the system fluctuates, the valves 8 pops and the sleeves 16 oscillate on the flexible struts, which results in regeneration (cleaning) of the sleeves due to the shock load on the filter hopper and deformation of the sleeves. 1 hp f-ly, 5 ill.

Description

k .. 1. Have

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in the settling chamber 2. After opening the valve 8, the aerated mixture is recirculated in the system with partial filtration of air through the sleeves 16 of the filter sections 6 and 7; With pressure fluctuations in the system, valve 8 claps and oscillations of sleeves 16 on flexible racks occur, which results in regeneration (cleaning) of the sleeves due to shock loading and filter hopper and deformation of the sleeves. 1 hp f-ly, 5 ill.

The invention relates to pneumatic conveying and can be used in injection pneumatic conveying installations for separating material from the air transporting it directly to a receiving bin.

The purpose of the invention is to increase the efficiency of operation by increasing the degree of purification of the transporting air.

FIG. 1 shows a discharger of a pneumatic conveying installation in the period of switching on, general view; in fig. 2 - the same, during the period of work; in fig. 3 - mounting the filter sleeve on a flexible rack; in fig. 4 is a section A-A in FIG. 3 | in Fig.5 - node I in Fig about 3 ..

The discharger includes an ejector 1 installed above the settling chamber 2, the cavity 3 of which is connected by bypass pipes 4 and 5 with filter sections 6 and 7. Each nozzle 4 and 5 is equipped with a check valve 8 installed in the duct section at the entrance to the duct 9. The discharge nozzle 10 of the receiving duct 9 is connected to the vacuum chamber 11 of the ejector 1, the nozzle 12 of which is connected to the discharge pipe 13 of the pneumatic transport unit (not shown) „ The section 14 of the pipes 4 and 5 at the entrance to the box 9 is installed vertically above the inclined tower 15 of the latter. ..

Filtered sleeve 16 to improve its spontaneous cleaning of the nip fixed on a flexible rack 17 (Fig. 3), with spacer rings 1

The flexible stand is made, for example, of pipes of different diameters (variable sections) in height. It is provided with a flange 19, which rests on the pipe 20 and freely enters it with a lower condom. The pipe 20 is rigidly fixed by means of the crosspiece 21 on the neck 22 for fastening the sleeve with the yoke 23.

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The unloader works in the following manner.

When the pneumatic conveying system is turned on, the aerated mixture, usually from a chamber pump running on a compressed air network, flows through the injection pipe 13. The aerated mixture with excess pressure flows through the ejector into the cavity of sections 6 and 7 of the filter receiving boxes until the check valves 8 are closed.

The counterweight 24 of the check valve, balancing its valve 25, overlapping the pipes 4 and 5, is adjusted so that the weight of the counterweight, for example, at a pressure in the receiving hopper of up to 0.1 atm, does not allow the check valve to open. As a consequence, at the initial moment of the material being pumped into the receiving bin, an ejector creates a vacuum in the filter boxes 9 and the air and atmosphere is sucked through the sleeves 16 into the box 9. The hoses regenerate with a reverse air flow.

After the pressure in the cavity 3 of the connecting chamber 2 0.1 atm is exceeded, the valves 8 under pressure of the air otkryshatsya and the air from the cavity 3 is displaced by overpressure through the nozzles 4 and 5 into the duct 9. Next, part of the air is forced out through the filter sleeves into the atmosphere and part of the air enters the dilution chamber 11 of the ejector 1. At the same time, as a result of the vertical arrangement of the sections 14 of the pipes 4 and 5 above the ducts 9, solid aerosol particles hit the inclined bottom and roll down it into the chamber 1.1 of the dilution of the ejector and then in the sludge i- hydrochloric chamber 2. When filtering air through the sleeve filter into the pressure chamber 3 spontaneously may be reduced below 0.1 atm, the check valves 8 zahlopyvayuts thereby filter regeneration process is repeated a reverse air flow.

Thus, before a pressure of 0.1 bar is exceeded, the material of cavity 3 of chamber 2 is filled without air filtration through the hoses, and after exceeding the specified pressure, the bunker receiver is also filled with material, but already with recycle, which communicates with the chamber

by sticking a mixture in an enclosed space, filtering air through the hoses, and separating the material from the air transporting it.

Claims (1)

1. A discharger of a pneumatic conveying installation, containing a filter mounted above the precipitation chamber, a device for spontaneous automatic backwashing of the filter with a check valve, characterized in that, in order to improve the working efficiency by 15 20 25 a vacuum of the ejector, the outlet of the latter is connected to a precipitating chamber, which communicates with the filter box by means of an overflow pipe, the portion of which at the inlet of the box is located vertically above its inclined bottom, and said check valve is installed on this section. 2, the discharger according to claim 1, characterized in that each filter hose is mounted on a flexible rack with the possibility of free swinging. increasing the degree of purification of the transporting air; the discharger is equipped with an ejector, the nozzle of which is in communication with the discharge pipeline of the pneumotransport unit, and the filter is filled with a hose and equipped with an inclined bottom receiving box installed under the sleeves and a discharge pipe connected to the chamber vacuuming the ejector, the outlet of the latter is connected to a precipitation chamber, which is connected to the filter box by means of a bypass pipe, the section of which at the entrance to the box is located vertically above its inclined bottom, and said check valve is installed on this section. 2, the discharger according to claim 1, characterized in that each filter hose is mounted on a flexible rack with the possibility of free oscillation. Fig.Z Aa I 5