RU1797502C - System for collection sugar dust and scattered granulated sugar - Google Patents

Abstract

Scope: relates to dust collecting and cleaning devices for granulated sugar and is intended for collecting dust in places of its formation and for preventing its spread in production rooms through casings and shelters of dusty equipment and can be used in dust collecting systems for food and chemical industries Leninities and other industries. The purpose of the invention is to increase the efficiency of exhaust air purification and the use of industrial waste. SUMMARY OF THE INVENTION: the device consists of suction units for loading and unloading granulated sugar containing two-stage cleaning modules, connected in parallel through shut-off elements with air ducts and dust-receiving pipes of aspiration devices of technological equipment. The system has common fluid supply and collection manifolds with a fluid accumulator. On the fluid supply manifold, locking elements are installed in each module. Flexible hoses and pressure sensors are installed on the ducts. The device allows to improve the manufacturability of the system. 2 C.p. f-ly, 2 ill.

Description

The invention relates to dust collecting and cleaning devices for placers, for example dust and granulated sugar, and is intended to remove dust at the places of its formation and to prevent its spread in production rooms through casings and shelters of dusting equipment. The device can find application in the food, chemical, mining, gas industries.

A device for a two-stage dust collection of a drying fluidized bed cooling apparatus

for granulated sugar SPS-20. containing dry and wet cleaning cyclones, a fan, a trowel mixer, air ducts 1,

Exhaust air is removed from the apparatus by a fan. Sugar from the first-stage cyclones is removed to the hopper, and then sent through a turnstile to a trowel mixer. For hydration, second saturation filter juice was introduced to the second stage cyclones.

A disadvantage of this design is the low dust removal efficiency. AT

VI O VI SL O

Yu

SL

as a result of the operation of the device, the amount of entrainment to dried sugar is approximately 1.5%, which under conditions of bulk storage of granulated sugar can lead to significant losses.

The closest in technical essence to the proposed one is a dust collecting and cleaning device for granulated sugar containing an air duct with a flexible hose, a dry-cleaning cyclone with a shutter and a hopper, a vacuum pump, a water tank and a water separator 2.

Through a flexible hose, duct, sugar dust and granulated sugar are sucked into the cyclone by a vacuum pump. From the cyclone, through the gate, large particles of sugar dust fall into the hopper, and air dusted with fine sugar dust enters the liquid cavity of the vacuum pump and is discharged through the dehumidifier into the atmosphere of the RAU.

The disadvantage of this device is that

that when there is a large dust content of air in the liquid cavity of the vacuum pump, a liquid is formed with dust and sugar dissolved in it, which is carried away through the nozzles of the liquid and purified air of the moisture separator into the atmosphere and sewer. According to modern requirements, sugar dust removal should not exceed 0.02% in order to comply with environmental standards of purified air VI water.

The purpose of the invention is to increase the efficiency of purification of exhaust air and the use of industrial wastes by increasing the concentration of the collected dust solution and granulated sugar, increasing the reliability of operation.

Figure 1 presents the collection system of sugar dust and granulated sugar in the form of a block; figure 2 - diagram of a system for collecting sugar dust and powders of granulated sugar in the form of several blocks.

The proposed device (figure 1) contains a duct 1 with a flexible sleeve 2, summed up by dust collection pipe 3 to the place of scattering of granulated sugar. The dust intake pipes of the air duct are connected to the suction points of the aspirated technological equipment 4, and the air duct to the pipe 5 of the cyclone 6, the outlet pipe 7 of which is connected by the suction line 8 to the vacuum pump 9, and the dust removal opening tO is connected to the hopper 11 and the shutter 12.

A moisture separator 14 is installed on the discharge pipe 13 of the vacuum pump 9, the purified air exhaust pipe 15 of which is connected by a pipe 16 to an additional cyclone 17. The outlet 18 of the cyclone 17 is connected by a pipe

19 with a storage tank 20, and the outlet pipe of the cyclone 17 is vented to the atmosphere.

The pipe drain fluid 21 from the water separator 14 is connected by a pipe 22

with the storage tank 20. The pipe 23 of the liquid cavity of the vacuum pump 9 is connected by a forced feed pipe 24 to the storage tank 20. The forced pipe

0 of the feed liquid supply 24 contains two parallel-mounted electric pumps 25, the suction pipes of which are connected by pipelines 26 to the storage tank 20, and the discharge pipes 5 with the liquid cavity of the vacuum pump by the pipe 27, and a shut-off element 28 for draining the liquid.

A heat exchanger 29 and measuring instruments are installed in the storage tank 20

.0 of temperature 30, level 31, concentration or density of liquid 32 and there are shutoff elements 33 and 34 for draining the liquid and supplying tap water.

Figure 2 presents the system diagram

5 dumping of sugar dust and granulated sugar granules, consisting of several units, working, for example, when sugar is received and dispensed to the consumer from bulk silo. The system contains

0 blocks 35 of collecting dust and scattering of granulated sugar, which are parallel connected to each other with air ducts 36 and closed loop 37.

The block for collecting dust and placers of sah5 pa-sand dust 35 consists of the same elements as shown in Fig. 1, but each block includes a locking element 38. The air ducts are equipped with dust receiving nozzles, technological equipment designed for loading the silo, flexible hoses 2 pressure sensors 39.

Air ducts are equipped with dust receiving nozzles of technological equipment intended for vacation

5 - granulated sugar to the consumer from the silo, and pressure sensors 39.

Closed loop 37 consists of a manifold forcing feed 40 to vacuum pumps and a manifold

0 fluid collection in the storage tank.

To control the system, a remote control is provided (built according to any known scheme, not shown in the drawing) of the sequence of inclusion in the work of transport

5 means of aspirated technological equipment and equipment for collecting sugar dust and granulated sugar granules and turning them off. Pressure sensors 39 monitor the operation of the units and block the operation of process equipment.

The liquid used to irrigate dust in a vacuum pump is a sugar solution heated to 55, ... 60 ° C with a solids content of up to about 60%.

The system for collecting sugar dust and granulated sugar works as follows.

The start-up sequence of units 1 is identical to the start-up sequence of process equipment vehicles. When the silo is loaded from the factory, granulated sugar enters the filling station, from where it is delivered to the weighing bin via the loading conveyor and loaded into the first elevator, which transports sugar to the loading conveyor installed in the silo gallery. Further, granulated sugar enters and fills the silo container through a silo receptacle. In this case, sugar dust enters the blocks 35 of FIG. 2 through the nozzles through the air ducts 36.

When unloading granulated sugar from the silo through discharge devices (leaks), granulated sugar enters the dispensing conveyor through a hopper crusher. From the conveyor, sugar is fed to the second elevator and through the weighing bin to the unloading conveyor, the transfer unit to the vehicle. In this case, sugar dust enters the blocks 1 through the nozzles of technological equipment through other ducts.

When the units are turned on as indicated by pressure sensors 39, the processing equipment for loading or unloading is turned on.

When the vacuum pump 9 (Fig. 1) is turned on, dusty air passes into the cyclone 6, where the air flow, having acquired a rotational movement, is lowered in a helical fashion along the inner walls of the cylinder and the housing. In the central zone, a rotating air stream, free from dust up to 0.9 mm in size, moves from the bottom up and is removed through the pipe 7 to the vacuum pump 9. The largest part of the stream, in which the bulk of the generated sugar dust is concentrated, flows through dust extraction hole 10 into the hopper 11 and the shutter 12.

The air stream with uncoiled fine particles of sugar dust, passing through the suction line 8 into the liquid cavity of the vacuum pump 9, is mixed with the liquid supplied through

the pipe 23 through the pipe 24 from the storage tank 20 to the vacuum pump 9.

The contact of a dusty air stream with a liquid allows sugar particles to be captured and dissolved in themselves. The gas exiting the discharge port of the vacuum pump captures the liquid from the liquid cavity. The vacuum pump and discharges to the dehumidifier 14, from which it is partially discharged through the nozzle 21 and the pipe 22 into the storage tank 20, and the rest of the liquid is carried through the nozzle By discharging purified air 15 through line 16 to cyclone 17, it is cleaned of liquid droplets before being released into the atmosphere. The liquid released from the tank enters through the hole 18 through a pipe 19 into the storage tank 20. During the operation of the vacuum pump 9 in the liquid cavity, its liquid from the storage tank 20 is forcibly supplied by the electric pump 25. Before operation, tap water is poured through the shutoff element 34 In this case, the liquid level is monitored by the sensor 31, and the liquid temperature by the sensor 30. The concentration of the liquid with sugar dust dissolved in it is determined by the readings of the density sensor or centration liquid 32,

To cool the liquid in the storage tank 20, a heat exchanger 29 is used, into which recycled water with a temperature of 15 ... 17 ° C is supplied from the sugar factory. A liquid with a sufficient concentration dissolved in it by sugar dust is dispensed into a motor vehicle or to a factory through a shut-off element 33. Then, tap water is poured through the shut-off element 34.

In the event of the maximum amount of dust occurring at the places of suction, two units on the same duct from the control panel are put into operation, which increases the reliability of operation.

Thus, the collection system for sugar dust and granulated sugar allows to increase the efficiency of purification of exhaust air and to use production waste by increasing the concentration of the collected dust and granulated sugar solution, to ensure the system’s operability both with a minimum and a maximum amount of suction dust.

Claims (3)

1. A system for collecting sugar dust and powders of granulated sugar containing a duct with a flexible sleeve and a unit for collecting sugar dust and placers of granulated sugar, having a dry-cleaning cyclone with a hopper Vi shutter, a vacuum pump with a forced-feed liquid supply pipe and a moisture separator with liquid branch pipes and purified air, with the exception that in order to increase the efficiency of purification of exhaust air and the use of industrial wastes by increasing the concentration of the collected dust solution and growing sugar rashes, it is equipped with a storage tank of the solution and an additional 0 5 a cyclone in communication with the branch pipe of the cleaned air separator of the moisture separator and the atmosphere, and the nozzles of the drain of the liquid separator and the additional cyclone and the forced feed pipe of the vacuum pump are connected in a closed circuit to the storage tank. 2. The system according to claim 1, characterized in that, in order to increase reliability in operation, it is equipped with additional units for collecting sugar dust and powders of granulated sugar, connected in parallel with the duct and a closed loop. 3. The system according to claim 1, with the exception that the storage tank of the solution is equipped with a heat exchanger and means for controlling the parameters of the solution.