SU992972A1 - Spray drying process automatic control method - Google Patents

Description

one

The invention relates to a drying technique and, in particular, to automatic control of the spray-drying process.

There is a known method of automatic control of the process of spraying (drying) hch; mainly for protein feedstuffs by measuring the temperature of the drying agent before and after drying and the material consumption, the fuel consumption is changed according to the material consumption and the temperature of the drying agent at the inlet, and the material consumption is not affected by the drying agent temperature at the output of Cl J.

However, the known method does not provide the required languor.

The purpose of the invention is to improve accuracy.

This goal is achieved by measuring the amount of dust in the exhaust gases and the protein content in feed preparations before and after.

drying, and fuel consumption is additionally affected by the amount of protein content before drying, and the material consumption is affected by the protein content after drying and the amount of dust in the exhaust gases.

The drawing shows the implementation scheme ssgsob.

The scheme contains a spray tank 10 t, sensors 2 and 3 of the temperature of the drying agent at the inlet and outlet of the smelt, regulators 4 and 5 of the temperature of the drying agent at the inlet and outlet and the dryer, sensor 6 of the amount of dust in the exhaust gases, unit 7 for determining the current yeast suspension consumption, blocks 8 and 9 of protein determination in the yeast suspension and the final product.

The method is as follows.

From temperature sensor 2, the signal goes to controller 4, which stabilizes the temperature of the drying

3.U92E724

agent at the entrance to the dryer. by means of an emulsion and the characteristics of the product obtained.

Claims (1)

Usually, at the entrance to the dryer VB in general, using the proposed drying zone, part of the fodder yeast is overdried and in the form of dust from the dryer with waste and gases. This portion is captured and added to the READY product. The more over-dried fodder yeast, the worse the quality of the resulting product and the greater the loss. THEREFORE, the sensor 6 measures the amount of dust with waste gases and sends a correction signal to the regulator to change the temperature at the entrance to the dryer. The controller 5 stabilizes the temperature of the drying agent at the outlet of the dryer, i.e. waste gases, by changing the flow rate of the yeast suspension. Block 7 determines the change in the current consumption of the yeast suspension and sends correction signals to the regulators and 5. Due to the fact that there are no accurate sensors for determining the protein content in the solution and product in blocks 8 and 9, the laboratory express method determines the protein content in the yeast suspension and the finished product and in terms of their values, periodically adjustments to the tasks for the regulators and 5, respectively. This leads to a significant improvement in the quality of drying of the feed yeast, since changes in the composition in the initial j are taken into account povvol ba is to intensify the drying process, to regulate the quality of the product and reduce the loss of fodder yeast from overdrying. DETAILED DESCRIPTION A method for automatically controlling a spray-drying process, preferably protein fodder preparations, by measuring the temperature of the su-. the stitching agent before and after drying and the material consumption, and the fuel consumption is measured according to the consumption of the material, the temperature value of the drying agent at the inlet, and the material consumption is measured by its value and the temperature of the drying agent at the outlet, in order to increase accuracy, the amount of dust in exhaust gases and the protein content in feed preparations are measured before and after drying, and the fuel consumption is additionally affected by the amount of protein content before drying, and the material consumption is measured by the protein content after drying and ETS dust in the flue gases, sources of information, received into account in the examination 1. USSR Author's Certificate N568827, cl. F 26 B 28/10, 1973.