SU167477A1 - AUTOMATIC REGULATION SYSTEM OF CONTINUOUSLY OPERATING PLANTS FOR DIGESTION OF STARCH-CONTAINING RAW MATERIALS - Google Patents

Description

Systems are known for the automatic control of continuously operating plants (with a pre-thrashing mixer of raw materials and water and a brewing column) for cooking the "rachmalo-containing raw materials." Such systems include a temperature control assembly in a brewing column containing a sensor and a stabilized lysing steam flow controller.

The proposed system ensures the maintenance of the optimum mode of cooking. For this purpose, it is provided with nodes designed respectively to maintain a predetermined concentration of starchy substances in the mixture of the raw material with water and to regulate the productivity in accordance with the consumption of the product at subsequent stages of production. These nodes are interconnected as well as with a temperature control unit.

The unit for maintaining a given concentration of starchy substances is advisable to be made from sensors of raw material consumption, water consumption and concentration of the mixture at the exit from the mixer - 1 dedrazvarnik, regulator of the ratio of two quantities (raw material and water consumption) with correction by the third parameter (mixture concentration) and flow sensors of the raw material and water of the block summing up these expenses with the regulating body controlled by it by the authority of the mixture level in the mixer spreader.

The unit for temperature control in the brewing column should be equipped with a functional setpoint that serves to control the stabilizer of the live steam flow in accordance with the signals of the unit for summing the flow of raw materials and water. The unit for controlling the capacity of the plant can include a flow sensor of the boiled mass and a raw material flow controller connected with it through the precursor block.

Pa drawing shows the principal

cxe.Aia automatic control of continuously operating plants for the cooking of starch-containing raw materials.

In the system with a predrazvarnik mixer / feedstock and water and a brewing column 2, a temperature control unit in the brewing column is provided, which contains a temperature sensor 3, a stabilizing regulator 4 (4RB-32A) of steam consumption, a functional unit (PD-3A) 5, knot

under the specified concentration of starchy substances, including the sensor 6 consumption of raw materials, sensor 7 water consumption and sensor 8 concentration of the mixture (PB-2a) at the outlet of the mixer-predvarvika /, controller 9

the concentration of the mixture; raw material and water consumption summation unit 10, associated with sensors b and 7 and intended to control the regulator // in the predvarger mixer and functional setpoint 5; an assembly for adjusting the production of the installation, consisting of a sensor 12 for boiling mass flow, a precursor block 13 and a controller 14 for raw material consumption. The composition of each of these regulators includes an appropriate regulatory body. So, in regulator 14 of the raw material - the regulatory body 15, in regulator 9 - the regulating body 16, in the regulator of the direct steam - the regulator 17.

The principle of operation of the proposed system is as follows.

Pre-cleaned raw materials, such as grain, enters the hopper 18, from which the regulator 15 enters the tape weighing device (flow sensor 6. Then the grain enters the crushing plant 19, from the KCTOpoii in a crushed form enters the mixer-predrazvarnik 1, where there is no mixing. with warm water, heated by extrapar, entering the CP of steam-vapor-mountain 20.

From the spedder precursor mixture, the pump 21 is fed through the heater 22 to the brewing column 2. From the latter, the boiled mass under the action of the pressure difference enters the holders 23 and then into the steam separator 20, where the boiled mass breaks and the starch is extracted.

If the mass flow to the subsequent stage of the process is changed, then the mass flow sensor 12 and the precursor block 13 will give the appropriate signal for setting the raw material flow controller 14. In this controller, the actual consumption of the raw material detected by the flow sensor 6 is compared with the reference, and an amplified resultant signal is output to an actuator that moves the regulator 15. At the same time, to maintain the desired concentration of the mixture at the outlet of the blender predvarion, the signal from the sensor the flow rate is simultaneously supplied to the regulator 9. where the actual ratio of the flow rate of the grain and the water is compared with the target.

The resulting signal is sent to the regulator 16. In addition, the system provides for automatic correction of the task and the regulator 9 but the actual coicitracin mixture detected by the concentration sensor. This takes into account the change not only in the consumption of grain, but also in its humidity.

If the feed and water nodache changes in the pre-mixer mixer, the regulator 11 changes the level of the mixture in this predvarit. The heating rate does not change. Regulatory Authority // Acts

the output signal from block 10, which summarizes the current consumption of grain, water. From the same block, the output signal goes to the setting device 5, which changes the setting of the stabilizing controller 4. This takes into account the optimum ratio between the cooking time and the cooking temperature, ensuring the minimum loss of starchy substances.

0 In controller 4, the situation occurs. Comparison of the actual temperature in the column, determined by sensor 3, with the task, and the resultant sigal goes to the regulator 17, which in turn changes the supply of mated steam to column 2.

Subject invention

Claims (4)

1. An automatic control system for continuously operating plants for cooking starch-containing raw materials with a mixer-iredrazvarnik feedstock and water and a brewing column, including a temperature control unit in the cooking column, containing a temperature sensor and a stabilizer of a direct steam flow regulator, characterized in that , in order to optimize the cooking process, it is equipped with nodes, respectively, to maintain a given concentration of starchy substances in the mixture of the raw material with water and for performance is hulled in accordance with the consumption of the product at the subsequent stages of production, and the nodes are interconnected with each other and with the node of the mon-temperature mon. 2. The automatic control system of claim 1, wherein the node for maintaining a predetermined concentration of starchy substances comprises flow sensors 0 raw material, consumption of Veda and the concentration of the mixture at the outlet of the pre-divider mixer, regulator of the ratio of two quantities (consumption of raw material and water consumption) with correction by the third parameter (concentration of the mixture) and 5, a block for summing these costs with a regulating body controlled by it for the mixture level in a predivision mixer connected with sensors for the consumption of raw materials and water. 3. The system of automatic control 0 on PP. 1, 2, characterized in that the node for The temperature control in the brewing column is equipped with a functional setting device that serves to control the stabilizing regulator of the steam flow in accordance with the criteria of the unit for summing up the consumption of raw materials and water. 4. The system of automatic control of and. 1, characterized in that the installation control unit It contains a flow meter of the sparse mass and a record; with it through the precursor block the flow controller of the raw material. Water Circulating steam