RU2000848C1 - Powder feeder - Google Patents

Abstract

Usage: the invention relates to a device for feeding powders from a fluidized bed and can be used to increase the uniformity and stability of the supply of a polydisperse mixture of heavy or easily sticking materials. SUMMARY OF THE INVENTION: ejectors are staggered across the slope and are made in the form of cylinders. At the same time, the intake holes are uniformly arranged along the cylinder section and are made in the form of slots, beveled in the direction of the mixing chambers of the ejectors. In addition, slots are made with a length along the inner wall of the suction chambers of the ejectors. equal to 1.0 - 12, and a width of 020 - 025 of the inner diameter of the suction chambers 1 s.pf-ly, 5 id

Description

FIELD OF THE INVENTION This invention relates to devices for feeding, dispensing, and transporting bulk materials, mainly from a fluidized bed, to aspirants used in manual or automatic powder coating plants.

A well-known powder feeder contains:;: the first chamber is pseudo-fluidized with an ejection.: - jw w is the powder supply to the atomizer.

For fluidized heavy materials (with a specific gravity of 1200-1600 kg / m) of powders, for example, glass, aluminum oxide, or non-cohesive matter, it is also alkaline powder; y:; with the range of fractional est: m (of certain types of powder paints, for example, polyester P-EP 11300Y), high-speed compressed air is required by Gülee. It is necessary to mix the fluidized bed in order to prevent the separation by fractional composition and the precipitation of ole; large particles, their olir; 1 HP dne to-: measures:. |.

Increased rates of fluid flow directed to the fluidization of the powder lead to the formation of large bubbles in the fluidized bed, causing irregularity and instability.

Closest to the claimed technical essence is a powder feeder comprising a fluidization chamber with an inclined porous baffle and ejectors with intake openings located above the baffle.

The disadvantage of the feeder is the unevenness and instability of the supply of floor and surface and a mixture of heavy or easily sticking materials.

The aim of the invention is to increase the uniformity and stability of the supply of polydisperse mixture and heavy and easily sticky materials

This goal is achieved in that in a powder feeder containing a fluidization chamber with an inclined porous partition and ejectors with intake holes located above the partition, the ejectors are mounted in a checkerboard pattern across the slope and are made in the form of cylinders, while the intake holes are uniformly located along the cylinder section and made in the form of slots, beveled in the direction of the mixing chambers of the ejectors, the slots being made with a length along the inner wall of the suction chambers of the ejector equal to 1.0-1.2. and a width of 0.20-0.25 of the inner diameter of the suction chambers

0

5

g

5

0

A feeder made in this way, having aerodynamic drag on the path of ascending air flows, allows increasing fluidization rates of the material, creating a high-quality fluidized bed of heavy material, eliminating clumping and sticking of finely divided powder paint on the porous partition, and boiling of the material layer is not accompanied by passage doiig: m upwards of large bubbles and ejection of mag. the bubbles formed at the surface of the porous septum are crushed by interfacial interference with the ejector bodies and during noponjKri suction and their intake, in the RavN ZhSfmiy ppdggn. material from ii-p .-. HJ rX layers l / .pmschgo right-hand careless-;., me ::; “CNOOS v. even supply of fi .i Lviu-iCT Of: leg M-iT :: pna ci. Construction

(TOOOU P ON SOL. :: ..- BUT DOWN

fy | - | Ryii 3i 4iino at all time Mstrizla n razit, 1, is short for electric and electric pipvo jH cj e;: ii: and eat caMtiM to exclude then: 3, jnnp, iH - i. so; D: r b r ri bi p.- n y u feed ma (.

 if. iir. 1; 1lsO-l: -. :: n Pg plglatic luir. iir .., general ui / i; in FIG. 2 - same, pid.: In FIG. 3 - p zg / oz A -A but FIG. 1; at 4 y. ate H; .I f1, (.: im f: t, G - view by

if FJ iiii fs. I

PETPGR.L comp.-ii .v. p.chnpu, m of which according to; hl 10--151 rf.Hxn; gch.zn porous perogprodk 2. Space ianpy. located under the porosity ps. It is connected by a nozzle 3 with a counter of compressed air. With the system pnevmot..porte vind 1 is connected p.zgruP o; and - ;. equipped with phi / r horn. C si:; mine y / -1H: Tligzani p01; koobochny mg.teri / bh {not (rendered) - n tgg / ek 6. On Re; i Ht; ii bath hatch 7 and safety explosion are open - n.,; valve; 8. In bskuyu plot of the bathtub 1 made jepniKa.TjHbie pr.; Go 9 different pig.ot s ;; ods: 1hih damper 10, inform id-; it with a chamber of a bulk layer 11.. Its central distribution center is located below the por- CTQI; partitions 2, In the bottom of the chambers of the placental layer, a metering ejector 12 is connected to the receiving chamber of the transporting ejector 13, which is connected to the sprayer. The shutters 10 are closed / in the required position with the screws 1. Above the porous partition 2 across: on a slope, two rows of ejectors 15 arranged in a checkerboard pattern are mounted. Each ejector 15 is a cylindrical housing consisting of suction clmers 16 and a chamber a mixture of 17 having a single outer diameter and an air nozzle 8 chamber

mixing 17 is in the form of a Laval nozzle. In the suction chamber 16 there are several sampling holes evenly spaced in the form of slots, beveled in the direction of the mixing chamber. The length of the slit a along the inner wall of the suction chamber is 1.0-1.2, and its width is 0.20-0. 25 internal diameter d of the suction chamber.

The feeder operates as follows, Compressed air flows through the nozzle 3 into the bath 1, passes through the porous partition 2 and brings the powder material above it into a fluidized state. Through the slots 9, the powder enters the chamber of the bulk layer 11,

0

from which a metering ejector 12 is supplied to the transporting ejector 13 and further to the atomizer, the ejectors 15 take the powder directly from the fluidized bed and feed it to the atomizers.

Compared with the known inventive feeder, it provides a uniform and stable supply of polydispersion mixtures: - peas of heavy and easily sticking materials.

(56) Copyright certificate of the USSR No. 1005942. cl. In 05 In 7/24, 1983. 15 Copyright certificate of the USSR N: 568463, cl. B 05 B 5/08, 1977.

FORMULA AND SECTION

Claims (2)

1. A POWDER FEEDER comprising a fluidizing measure with an inclined porous baffle and ejectors with intake openings located above the baffle, characterized in that, in order to increase the uniformity and the fact that the slots are made according to the internal instability of the feed of a polydisperse mixture of heavy or easily sticking materials, the ejectors are mounted staggered across the slope and are made in the violet wall of the suction chambers of the ejectors 1.0 - 1.2 and the width 0.20 to 0.25 of the inner diameter of the suction chambers. 8 J4ri r de cylinders, while the intake openings are evenly spaced along the cylinder cross section and are made in the VINR slots, beveled in the direction of the mixing chambers of the ejectors. 2. The feeder according to claim 1, characterized The front wall of the suction chambers of the ejectors is 1.0 - 1.2 and a width of 0.20 - 0.25 of the inner diameter of the suction chambers. / Figure 1 shda  / - /. 15: - / .-.: -: -: -: -. 4 -.-: - :: -. / FIG. I Aia, i  / - / -.-: - :: - .J2S. Fig.Z sixteen 5 I 18/5 , - $$$$$ Ј   , Yjt-jf Fjt Jf ifi -jrf, rifS -r7 ///////////////// s r  shchera /////// Yl.