SU1233954A1 - Installation for pneumatic electrostatic depositing of pulverulent materials - Google Patents

Description

The invention relates to a technique for applying powdered polymeric materials in an electrostatic field.

The purpose of the invention is to improve working conditions, reduce fire and explosion hazards and reduce energy costs.

FIG. 1 shows an installation for pneumo-electrostatic deposition.

in an electrostatic field with the help of 2, once in a pro-spray me the front wall. Through the opening for the sprayer and the opening for entry and exit of the product to be painted into the application chamber 1, air flows due to the suction effect of the ventilator. Powder particles, not settled on the product, air flow direction

2-O are poured through a tapering channel and an outlet 8 into a cyclone 9, this separating the powder paint to 80-85%, which accumulates in the cyclone collector. The powder dispenser AA in FIG. 1} in FIG. 3 shows a section BB in FIG. 2

The installation comprises a deposition chamber 1 with an opening for the sprayer 2 and transport openings for the suspensions 3 with the products to be painted 4. The sprayer 2 is connected to a high voltage source 5 and to an ejector mounted at the bottom of the dispenser 7.

In the inclined wall of the chamber 1 opposite to the aperture for the atomizer 2, an outlet opening 8 is made, by which the chamber is connected to a recovery device containing a cyclone 9 and a bag filter 10. In front of the outlet opening 8 connected to the cyclone 9, installed locking screw 12, perforated valve 13. The unit is equipped with a set of interchangeable dampers with different area of holes.

The bottom of the chamber is provided with a downwardly extending nozzle 14 with a valve 15.

The dispenser is placed under the nozzle 14. An opening 16 in the bottom of the chamber connecting the cavities of the nozzle 14 and the chamber 1 is equipped with a visor 17 directed towards the outlet 8. The valve 13 is located closer to the outlet 8 than the opening 16 with the visor 17.

The installation works as follows.

The product to be painted is conveyed to the chamber 1 by a conveyor (not shown). The powder paint is applied

3954. 2

in an electrostatic field with the help of 2, once in a pro-spray me the front wall. Through the opening for the sprayer and the openings for the entrance and exit of the painted product into the application chamber 1, air flows due to the suction effect of the fan. Powder particles that are not deposited on the product are directed by the air stream through the narrowing channel and you

the inlet 8 into the cyclone 9; this results in the separation of the powder paint to 80-85%, which accumulates in the cyclone collector. The powder-air mixture from the cyclone flows through the pipelines to the bag filter 10, where the paint remaining from the powder is retained and collected in the lower filter hopper, and the cleaned air

is emitted into the atmosphere. To discharge the powder paint from the cyclone collectors and the filter, pipelines are connected to powder paint pneumatic conveying devices located in the lower parts of the collections. When the powdered material is loaded into the dispenser 7, the pipelines are connected to the tangential nozzle 7 dispenser located below the lid. Excess air with powder paint through the hole in the cap, the pipe 14 and the hole 16 enters the chamber 1 and is sucked into the cyclone 9 and then into the filter 10. The amount of powder-air mixture from the dispenser 7 can be adjusted by the damper 13 and the valve 15,

Due to the fact that a replaceable valve 13 is installed in chamber 1

varying degrees of perforation, suction air flow rates around the painted product can be adjusted so that the aerodynamic interaction of the powder paint torch from the sprayer with the surface of the painted product will be optimal for this type of product and the applied material.

A-4

Editor T. Miteiko

Fig.Z

Compiled by L. Yanushin Tehred L. Serdyukova

Order 2931/7 Circulation .681

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader G. Reshetnik

Subscription

Claims (2)

1. INSTALLATION FOR PNEUMO- ELECTROSTATIC POWDERING POWDERED MATERIALS, containing a spraying chamber, connected to an outlet with a recovery device, a sprayer and a dispenser, characterized in that, in order to improve working conditions, reduce fire and explosion hazards and reduce energy consumption, the bottom of the spraying chamber is equipped with an expanding pipe underneath with which the dispenser is located, and in front of the outlet there is a perforated damper, which the camera is equipped with. 2. Installation according to π. 1, the fact is that the perforated damper is interchangeable with different hole sizes.