RU2449539C1 - Method for delivery of flour into dough maker - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention is related to food industry, in particular, to a method for delivery of bakery flour and bulk products. The method involves delivery of flour into at least one silo bunker and further along the pneumatic transport system. The said system includes an inlet filter mounted on the suction tube, a centrifugal booster with an integrated electric motor equipped with petal-shaped gasodynamic bearings, an adjusted performance charging feeder, a receptacle bin and a filter for separation of media. Delivery is performed so that to enable adjustment by means of a monitoring system including a flow limitation element with an electronic sensor mounted inside the suction pipeline and an analogue signal converter mounted inside the control console inverter.

EFFECT: invention enables material transportation efficiency enhancement, production of environmentally friendly compressed air (gas) with comparatively low outlet temperatures combined with a low noise level, a long useful life and small dimensions as well as enhancement of flour quantity accounting accuracy and raw material loss reduction.

2 dwg

Description

The invention relates to the food industry, in particular to the supply of baking flour, as well as for the supply of other bulk products.

A known method of feeding flour and doses of loose solid bread additives in a dough mixing machine, comprising keeping the flour in the hopper and dosing it into the dough mixing machine through the outlet of the hopper, as well as regulating the amount of flour passing through the outlet of the hopper using a device for dispensing flour from the hopper moreover, the method also provides for the supply of doses of bread additives in the dough mixing machine using a metering device for dispensing bread additives, including a drive element nt for issuing doses of bread additive, the method provides for the operative connection of the drive element of the dosing device and the device for dispensing flour from the hopper, while adjusting the dose of bread additive supplied to the dough mixer in proportion to the amount of flour passing through the outlet of the hopper (see RU 2364086 C1, item 7, 08.20.2009).

The disadvantage of this method is the low efficiency of the process.

The closest analogue is the method of pneumotransporting bulk material, including loading it into a feeder, moving it to the mixing chamber of the latter, supplying compressed air to it to obtain an air-material mixture, and transporting the resulting air-material mixture to the discharge point, characterized in that before loading the bulk material into the feeder its flow is divided into n flows, and then the flows are sequentially introduced into the feeder, increasing their number from i = 1 to i = n at time intervals _{i + 1} = L / U ₁ where L - length of conveying, U _i - the speed of movement of the leading edge i-th stream aeromaterialnoy mixture while mixing with the air material produced each time after entering the i-th stream in the admission feeder it in the mixing chamber of the latter, and before the end of the transportation process, they reduce the productivity of loading the material into the feeder, reducing the number of flows introduced into it from i = n to i = 0 (see RU 2117621 C1, 08.20.1998).

The disadvantages of the closest analogue are the high energy consumption for pneumatic conveying.

The objective of the invention is to reduce energy consumption, increase reliability and environmental friendliness, as well as resource conservation.

The problem is achieved in that the method of supplying flour to the dough preparation unit provides for the supply of flour from at least one silo hopper and then through a pneumatic conveying system, which includes an inlet filter mounted on the suction nozzle, a centrifugal supercharger with a built-in electric motor equipped with lobe gas-dynamic bearings, feeder-loader with adjustable capacity, receiving hopper and filter for separating media, while the feed is carried out with the possibility of p -regulation by the tracking system including flow restricting element with electronic sensor mounted in the intake manifold, and an analog signal transmitter mounted in the inverter control unit.

The technical result of the claimed invention is to simplify the system for introducing the flow of bulk material into the feeder, low energy consumption due to the absence of rubbing elements while ensuring uniformity of the process of compressing air (gas) and ensuring constant performance (volume) during pneumatic transportation of bulk material. At the same time, there is no need for lubrication, which in turn allows the production of environmentally friendly compressed air (gas) with relatively low outlet temperatures, with a low noise level, a long service life and small dimensions. And also the claimed method allows to increase the accuracy of accounting for the amount of flour and reduce the loss of raw materials.

Petal gas-dynamic bearings during the rotation of the electric motor generate heat, which must be removed to maintain a constant temperature. Heat is removed from the lobe gas-dynamic bearings through housing parts and by blowing using working air (gas). When using flap gas-dynamic bearings, the motor speed increases (up to 40,000 rpm), which reduces the noise level during operation. The use of petal gas-dynamic bearings allows the process of feeding flour at a constant speed of transportation of the material, regardless of the resistance of the line. Petal gas-dynamic bearings have stabilizing properties and do not allow the occurrence of vortex instability of the rotor, work with limited imbalance.

The essence of the method is illustrated by drawings.

Figure 1 presents the line for feeding flour to the dough preparation unit.

Figure 2 presents the structural block diagram of a centrifugal supercharger.

The method of supplying flour is carried out using the devices that make up the line, which contains at least one silo hopper 1, pneumatic conveying system 2, feeder-loader 3, receiving hopper 4 and a filter for phase separation 5. The pneumatic conveying system includes an inlet filter 6 mounted on the suction pipe 7, a centrifugal supercharger 8 with a built-in electric motor 9, equipped with lobe gas-dynamic bearings 10.

The method is as follows.

Flour is fed into the silo 1 and, through the pneumatic conveying system, is sent to the dough preparation unit.

Upon reaching the required value of the analog signal corresponding to the values of the set parameters for compressed air (pressure, flow, flow rate, etc.), a balance occurs in the operation of the centrifugal supercharger. Thus, depending on the load of the route with the product, the tracking system ensures that the centrifugal supercharger reaches the required mode.

The idle mode prepares the centrifugal supercharger for operation, balance comes and the cycle repeats. An autonomous cooling system is included. The subsequent exit of the centrifugal blower to the operating mode occurs when the required values are reached, the set parameters.

When the centrifugal supercharger is in operation, but without the supply of flour (bulk material), the minimum energy consumption occurs. When flour enters the line, the load on the centrifugal supercharger increases. The tracking system provides the output of the centrifugal supercharger to the power corresponding to the given analog signal until the balance between the given load and the centrifugal supercharger works. When the load is reduced (reduction or absence of flour in the feed line), the analog signal from the sensor of the tracking system decreases and the power consumption of the centrifugal supercharger decreases.

The present invention allows to increase the efficiency of material transportation, to develop environmentally friendly compressed air (gas) with relatively low outlet temperatures, at a low noise level, a long service life and small dimensions, and also improves the accuracy of accounting for the amount of flour and reduce the loss of raw materials.

Claims (1)

A method of supplying flour to a dough preparation unit, characterized in that it provides for the supply of flour to at least one silo hopper and then through a pneumatic conveying system, which includes an inlet filter mounted on the suction pipe, a centrifugal supercharger with a built-in electric motor equipped with petal gas-dynamic bearings, a feeder-loader with adjustable capacity, a receiving hopper and a filter for separating media, while the feed is controlled by means of a tracking system, including a flow restriction element with an electronic sensor installed in the suction pipe, and an analog signal converter installed in the inverter of the control panel.

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