SU1125187A1 - Method for automatically controlling reduction of sulfurous gases with natural gas - Google Patents

Abstract

A method of automatic control of the process of reducing sulfurous gases to natural gas by supplying natural gas and oxidant to combustion and controlling the temperature in the reactor depending on the flow rate and temperature of sulfur gases fed to the reduction, which is so reduced in order to increase the reactor productivity by reducing the sulfur gases supplied to the reduction, in order to increase the performance of the reactor by reducing the sulfur gases supplied to the reduction, in order to increase the performance of the reactor due to reduction of sulfur gases supplied to the reduction, in order to increase the performance of the reactor due to reduction of sulfur gases supplied to the reduction, in order to increase the performance of the reactor due to reduction of sulfur gases supplied to the reduction, in order to increase the performance of the reactor due to reduction of sulfur gases supplied to the reduction, in order to increase the performance of the reactor due to reduction of sulfur gases used for the reduction, in order to increase the performance of the reactor due to reduction of sulfur gases. in it, the temperature in the reactor is controlled by changing the flow rate of natural gas supplied to the combustion, depending on the oxygen content in the sulfur channel s gas.

Description

Natural gas to the ooccma ose gas source gas mixture to the boss taHoSyJCHue Bucjf. t °, c.t e her / V // X // U / / X / Gas OKuc / ii / me / Jb Natural gas / gas Bjjf- wear / i

The invention relates to the automatic regulation of the temperature regime of the process of reducing sulfur dioxide gases with natural gas and can be used in the disposal of waste sulfur dioxide gases from metallurgical and other industries.

There is a method for automatically controlling the process of reducing sulfur dioxide by stabilizing the ratio of process and reduction gas flow to the reduction reactor, where the ratio of process and reduction gas costs is adjusted depending on the concentration of sulfur dioxide and oxygen in the process gas. The correction signal is formed as the sum of the products of the concentrations of sulfur dioxide by the stoichiometric coefficient for sulfur dioxide, which is set in the interval 0.5-0.7, and the concentration of oxygen by the stoichiometric factor for oxygen, which is set in the interval 0.45-0.51 1 .

The disadvantage of the method is that the temperature of the reduction process is manually controlled by changing the temperature of the heating of the process gas supplied to the reduction.

The closest to the invention in its technical essence and the effect achieved is a method of automatically controlling the process of reducing sulfur gases by natural gas by supplying natural gas and an oxidizer to combustion and controlling the temperature in the reactor depending on the flow rate and temperature of sulfur gases fed to the reduction 2.

The disadvantage of this method is its low productivity due to temperature fluctuations in the reactor.

The aim of the invention is to increase the productivity of the reactor by reducing the temperature variation.

The goal is achieved by the fact that according to the method of automatic control of the process of reducing sulfur dioxide by natural gas by supplying natural gas and oxidizing agent for combustion and regulating the temperature in the reactor depending on the flow rate and temperature of the sulfur gases fed to the recovery gas supplied to the combustion, depending on the oxygen content in sulfur gases.

The drawing shows the scheme of implementation of the method of automatic control.

The control system comprises a reactor 1, a gas duct 2 for supplying the initial gas mixture (sulfur dioxide), a gas duct 3 for supplying natural gas for combustion, flow meters of sulfur dioxide A and natural gas 5, gas analyzer 6 for oxygen, thermocouples for measuring the temperature of sulfur gases 7 and temperature reactor 8, computing device 9, controller 10, executive

mechanism 11.

The method is carried out as follows.

In the reactor 1 serves the source gas mixture for recovery through the duct 2 and

natural gas in the flue burners for combustion at the flue 3. The costs of the original gas mixture (GHCT,) ,. and natural gas for combustion (Gnr..J, measured by flow meters 4 and 5, respectively. The oxygen concentration in the initial gas mixture (CO2), measured by the gas analyzer 6. The temperature of the initial gas mixture (1 ° C), and the temperature of the gases in the reactor (tp) is measured by thermocouples 7 and 8, respectively. Signals from flow meters, a gas analyzer and thermocouples are fed to a computing device 9,

which implements the equation

g, - g, Gp P - tucJT) gpGp / T - lg - -sdg 3.1 1)

D Gai is the consumption of natural gas supplied to the combustion burners for combustion, m. (Or l / h); Sis-the flow rate of the original gas mixture supplied to the recovery, m .. (or l / h);

Sush - heat capacity of the original gas

the mixture supplied to the recovery, kcal / m;

i is the temperature of gases in the reactor, ° С; ilic - initial gas temperature

mixtures, ° C;

with fjf-heat of natural combustion

gas, kcal / nm; ,,

Co-oxygen content in the source gas mixture, vol. share.

 - the stoichiometric coefficient for oxygen, which, depending on the composition of the natural gas supplied to the reduction, is set in the range of 0, 45-0.51.

and - empirical coefficient

taking into account the adiabatic heating of gases, which is set in the range of 1.1-2.6, depending on the content

oxygen in the oxidant gas and

process conditions.

The control signal, calculated by equation (1), from computing device 9 is sent as a control to regulator 10 for the consumption of natural gas for combustion, and from a controller for actuator 11, which changes the consumption of natural gas for furnace burners. Gas, 1125187

j4.

the oxidizer is fed to the furnace burners; the development is supplied in the amount of: CH,: S.Q

proportional to the consumption of natural gas, by-0.53.

given for combustion, with the coefficient of the use of the proposed method, an excess of oxidizing gas equal to or allows to increase the performance of the reactor to oC 1, which is controlled by the actor, and also prolong the service life by known methods. Natural gas at the price.

Claims (1)

METHOD FOR AUTOMATIC CONTROL OF THE ESTABLISHMENT PROCESS NATURAL GAS SULFUR GAS UPDATES by supplying natural gas and an oxidizing agent for combustion and controlling the temperature in the reactor depending on the flow rate and temperature of sulfur dioxide supplied to the recovery, characterized in that, in order to increase the productivity of the reactor by reducing the temperature fluctuation in it, the temperature in the reactor is controlled by changing the flow rate of natural gas supplied for combustion, depending on the oxygen content in the sulfur dioxide. 1 / similar throat mixture to boss tanoblenie - Gucx. Natural gas for recovery Gas - oxidizing agent Natural gas for combustion --------— Cell carrier) Well, Jd. SU „„ 1125187