SU1630906A1 - Dust-removing device of tower concrete mixer - Google Patents

Abstract

The invention relates to devices for aspiration and dedusting of a concrete mixing plant of a tower type and allows to intensify the process of dedusting. A dedusting device for a concrete mixing plant of a tower type containing covers for dispensers and conveyors, exhaust pipes 6 and 7, mixers 2, filters 15, suction nozzles t and collectors 13. It is equipped with a cover for 10 bunkers 9 with overflow pipes 11. Pipes 6 and one hundred to eight are withdrawn into the cavity of the cover-cover 10. Pipes 6 covers-covers of the dispenser can be equipped with valves. Exhaust pipe of concrete mixers can be equipped with an ejector 20, a check valve and taps 5. 1 Cp. f-ly, 1 ill. u o o sa o o o o o

Description

The invention relates to suction devices and dust removal of emissions from concrete mixing shops of tower type in the building materials industry.

The purpose of the invention is to intensify the process of dusting.

The drawing shows the proposed device.

The device contains aspiration pipes 1 of concrete mixers 2, cover-covers 3 metering devices 4, outlets 5, exhaust pipes 6 and exhaust pipe 7, one hundred to eight, bins 9, cover-cover 10 bins 9 with transfer pipes 11 and self-closing valves 12, vertical collectors 13, a cover-cover 14 of aggregate conveyors, filters 15 and fans 16. Shut-off valves 17 are installed on the exhaust pipes 6, and at the point of attachment of the taps 5 to the stand 8, i.e. in its lower part 18, a reversing valve 19 is mounted, and one hundred to eight are equipped with an ejector 20. All valves 19 and an ejector 20 are equipped with actuators 21. In the cover of the 10 bins 9, a pressure sensor 22 is mounted, acting through a control device 23 on fan drives sixteen.

The device works as follows.

Dusty air extracted through suction nozzles 1 from concrete mixers 2 and from cover covers 3 dispensers 4 of aggregates (sand, gravel, claydite, etc.) is discharged through taps 5, stand 8 and exhaust pipes 6 into the air cavities of the top of the hoppers 9 and a cover-cover 10, which combines in its structure a cover of the top of the hoppers 9 and a collection manifold of dust emissions, the latter being created when these cavities are combined by inclined overflow pipes 11 and has outlets to the vertical collectors 13, to which is connected pipes 7 cover cover 14 belt conveyors aggregates. Therefore, the dusty air can only be directed to the collectors 13 and further, dedusted by the bag filters 15 built into the upper part of the collectors 13, removed by the fans 16 to the atmosphere.

Maintaining the minimum required dilution in the air cavities of the shelter of the bins 9 is achieved by including the hoppers 9 in the air cavities of the shelter, as well as by switching on (or off) one or more fans 16 from the signal from the pressure sensor 22 through the control device 23. This variation in suction is caused increase (decrease)

filing fillers, changing their type or grade, as well as during periods of incomplete loading of equipment, repairs, etc,

Considering the consistent nature

filing the aggregates to the metering units 4, and then to the concrete mixer 2 and shifting over the cycles of such feeds to parallel-working concrete mixers 2, the removal of dust emissions from these sources is carried out only in

0 loading periods, which leads to the possibility of a rational redistribution of the suction volume in the system and its concentration in the place of the occurrence of dust formation. For this, exhaust pipes 6 are installed.

5 shut-off valves 17, together connecting the inclined bends 5 to the stand 8, a check valve 19 is mounted, and on the stand 8 - an air ejector 20. By blocking the actuators 21 of the valves 17

0 and ejector 20, it becomes possible such a sequence and combined work. When loading aggregates into metering stations A, valves 17 are open, but when they are subsequently unloaded into one of the concrete mixers

5 2 (taking into account the cycles of displacement of these operations) the valve 17 on the exhaust pipe 6 from the first group of metering units is closed, the check valve 19 is installed so that the dusty air leaves the loaded concrete mixer 2 through the outlet 5 to one to 8 (symmetric removal 5 at the same time, the second concrete mixer 2 is blocked), as a result of which the air ejector 20 is put into operation. The completion of unloading of 5 gels from the first group of dispensers 4 serves as a signal to open valve 17 on their exhaust pipe 6, to change the position of the check valve 19, the top of the discharge from the second group of weighing hoppers 4 (in the second beto0 nosmesitel 2) and closing the valve 17 at terminal 5 dispensers 4. Completion unloading determines the new signal blocking network to return to its original position shuttle valve 19, the valve opening

5 17 on the exhaust pipe 6 from the second group of dispensers 4 and disconnection of the air ejector 20.

In parallel with the feeding of the aggregate, cement, water flows into the concrete mixer 2.

0 and other components. Dust removal of the cement path (silo, auger, metering device) is more reliable to carry out in an autonomous scheme of hermetic channels and by installing a pressure filter on the external cement silos

5 (not shown).

Claims (2)

1. The dusting device of the concrete mixing plant tower, containing cover covers dispensers conveyors, exhaust pipes of concrete mixers. cover covers of dispensers and conveyors, filters with suction nozzles, collectors with nozzles, control system, characterized in that, in order to intensify the process of dedusting, it is equipped with an additional cover located in the upper part of the bins with shelters of hoppers with overflow pipes fixed on it, loading devices bins and manifold nozzles, which are connected you with flexible pipes with covers for conveyors, and exhaust pipes for concrete mixers and covers for metering containers are brought into the cavity of a cover for shelters. 2. The device according to claim 1, wherein the exhaust pipes of the cover covers of the dispensers are equipped with valves, and the exhaust pipe of the concrete mixer has an ejector, a flip valve and outlets, at the junction of which is a check valve.