SU643433A1 - Method of automatic regulation of process of aqueous solution reagent purification - Google Patents

Description

The invention relates to the automatic regulation of chemical or physicochemical variables, more precisely to the regulation of the concentration of hydrogen ions in aqueous solutions and can be used in the reagent treatment of industrial wastewater. A method is known for automatically controlling reagent purification of aqueous solutions by measuring the pH of the reactor outlet and the rate of change of the electrical conductivity of water at the reactor inlet, depending on which reagent consumption 1 changes. The closest to the technical essence of the invention is a method of automatically regulating the process of reagent purification of water solutions by measuring the pH concentration in the water at the outlet and the inlet of the reactor, compared with setting the pH value at the outlet of the reactor, forming by Comparison points for a two-way signal, controlled by an actuator acting on the inductor, which in two-step mode changes the amount of reagent supplied to the reactor inlet, and the control signal is generated at the reactor inlet that changes the limits of knife control for dispenser 2. Disadvantages The known method consists in the low accuracy of stabilization of the pH value at the outlet of the reactor due to the use of the two-step control law and low speed in the conditions of change in wide limits of composition 1 wastewater flow. The purpose of the invention is to increase the dynamic accuracy and speed of adjusting the pH concentration at the outlet of the reactor. The goal is achieved by additionally measuring the water level at the reactor inlet to the reagent inlet, summing the signal of the water level value with the signal at the reactor inlet pH value and converting the resulting value into the rate of change of the adder parameter, depending on which the reagent consumption changes . The essence of the method consists in measuring the pH concentration in the waters at the reactor outlet, the rate of change in the concentration of pH in waters at the inlet of psact ()) a, the rate of change in the level of the initial ring at the reactor inlet, algebraically summarize the interpreted signals with a given pH value at output p (of the actor and form a cut; 1-tal 1 summation signal, equal to the consumption of the reagent in the direction of reducing the mismatch between the desired and actual concentration values of the pH at the outlet of the reactor.

Under the conditions of open transnational wastewater disposal, but sewage and iM channels with predr ats that have periodic technological objects (for example, cotton mills), the composition and level of waste water and 1x water in the canals varies in a wide dianazone.

The introduction of pulses in terms of the rate of change of pH and water level at the reactor inlet anticipates the effect of compositional variations and initial water consumption on the concentration of pH at the reactor outlet. Changes in the composition of the nl water level at the inlet to the reactor are significantly compensated by changing the reactant supply to the reactor so that the pH at the outlet of the reactor changes slightly. Tem. M. The system speed increases and the dynamic regulation error increases.

The drawing is a schematic diagram of the implementation of the enooba of automatically regulating the reagent purification of aqueous solutions.

The method is carried out as follows: and in a manner.

Sewage water is open. In a manner but the sewage channel 1 enters the reactor-mixer 2, where it is mixed with waste water. The water level in the canalizing channel is measured by sensor 3, the concentrator pH at the reactor inlet is sensor 4, the pH at the outlet of the reactor by sensor 5. Differentiator b summarizes the signals from sensors 3, 4, converts them into the rate of change of the total parameter and acts on the regulating device 7. In the regulating device 7, the signal from sensor 5 is compared with task m, converted but to some law of regulation {for example, proportional-integral) and affects clanan 8, which changes the consumption of reagent.

Immersion associated with changes in the flow rate or composition of wastewater is largely measured by the differential pressure sensor 6 and the regulating device 7 through valve 8 before the concentration change

hydrogen ion ion iia reactor outlet (from sensor 5). .Vleiiee ha1 actor 1st in () PLN: H1-111 change the value of the PI: ia output:) of the factor and commissioned) to him /; | ruy1tsn: m device 7 through a clanap 8.

The use of peaieirniou water purification methods for cleaning water solutions, which are transported with sewer channels but open, but compared to sushi, using these methods, the quality of neutralization of water solutions, especially in water, and the amount of water being treated in the water, is determined.

So, if, with known methods, the pH concentration at the reactor inlet fluctuates in dianazone pH 8-10, the use of the removal method will maintain the concentration of hydrogen ions at pH 6.5-8, 5 i.e., the value that characterizes uncontaminated natural water bodies optimal for the development of mpkororglin3 .MOB.

Improving the quality of wastewater treatment of wastewaters at t; and proposed1; | 1M way gives people's economic affect. The economic efficiency of the method in the patient from the volume of treated water and their composition.

Formula a and 3 is about 6 rsten and

0A method of automatic recirculating the P () process of reagent purification of 13 dPy solutions is nuta.m. the pH concentration in the water at the inlet to the reactor outlet, depending on which, the reagent consumption varies, in that liobbiuiehhk of diyaconic accuracy and speed of regulation, donol; ite, 1no measure the water level at the inlet of the reactor to the input of the reagent, the signal value of the pH value at the inlet of the reactor and the resulting value 1) to the image; from in the rate of change of sum.mm.rpogo parameter in depending on which s: 1 are the charges (d reagent.

Mouthguards of nfor. Magli, iri -1 tye in BIHImanie during examination

1. Smirnov, Ts. N., Manusova, P. B., Automatic Regulatory Control of Neutralization of Waste Waters, Travilip, 1x Separated Metallurgical and Plastic Plant {) 5. M. Lleta; 1Lur0, 1967, p. 97--104.

2.Smirnov D.N.Automatic) Regulation of the processes of wastewater treatment and wastewater treatment 1) 1x water. M., Stroynzdat. 1974, p. 48 -50.

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