SU65942A1 - Installation for contact oxidation of sulfur dioxide - Google Patents

Description

Auth. ST. No. 48245 patented a method of automatic temperature control in contact devices. The present invention provides an installation that provides simple and accurate temperature control.

The drawing shows the installation diagram.

Gas goes through abcdefgh. Between d E e gas passes the first contact device /, between the fug gas passes the second contact device / D between the end part of the stream passes through the heat exchanger ///, and between a and 6 part of the stream passes through the heat exchanger IV. At point a, the gas enters the contact node, and at point h the gas leaves it. The temperature at point A is determined by the position of the throttles 1, with which you can maintain the temperature at this point at a constant level. This connection is proposed to be implemented with the help of a bell pressure regulator V, which maintains a constant pressure upstream of the contact apparatus. This smooths out sharp irregularities in operation. Pressure fluctuations affect the short c-d path. With an increased pressure at a point with most of the gas goes along the direct path c-d, the heat exchanger min ///, and under reduced pressure the regulator V will close the throttle / and force the increased amount of gas to pass through the heat exchanger ///, and the pressure fluctuations affect the temperature at point A is much weaker. This is a rough adjustment. Precise temperature control is performed by a contact galvanometer (potentiometer) 2, which, when the temperature at point A rises, opens through relay 3 a solenoid valve 4, which drains a part of the water and lowers its level in the tank

No. 65942-2 -

the regulator Y and the opening choke I, more cold gas enters the contact apparatus and the temperature at point A decreases. When the temperature at point A decreases, valve 6 opens through relay 5.

With this regulation, the flow changes from - /// - d and the temperature at point B. The regulator 1 /, lowering the temperature at point / 1, raises the temperature at point B. To prevent this from happening, valve 7 is turned on in parallel with the magnetic valve 4 , and in parallel with the magnetic valve 8 - the valve 6 of the regulator VI. When the temperature decreases at point A, valves 5 and 5 open. When the temperature rises, valves 4 and 7 open.

The temperature regulation at point B proceeds as described. The pyrometer, installed at point B, via a contact galvanometer 9 and relay 10 and // controls the opening of valves 12, 13, 14, 15. When the temperature at point B decreases, valve 13 opens, into (tank VI is supplied with water, the bell rises The gas is heated in the heat exchanger IV and increases so that it does not affect the temperature in the contact device I, the heating in the heat exchanger must be improved ///, i.e., the valve 1 is opened at the same time. torus V through valve 14, paired valves 12 and 15 are also connected in parallel. After valve 14 has triggered at point e, the same amount of gas with a normal temperature is supplied to the heat exchanger ///, which does not vigorously release heat to the flow c - /// - d, since the difference temperatures between them are less than normal. Therefore, the temperature at point B begins to rise.

The proposed control system is based on the use of bell regulators and brake magnets. The regulator is insensitive to pressure shocks and, once adjusted, the size of the streams in the water supply and drain pipes can be adjusted with any accuracy. Adjustment rates can be varied over a wide range.

Subject invention

Installation for contact oxidation of sulfur dioxide with automatic control of the temperature of the gas mixture, according to ed. St. No. 48245 is different, and in order to automatically control the intensity of the gas flow passing through the heat exchangers facing the latter, the throttle dampers are connected on one side with controllable hydraulics of the bell type, and on the other, by means of contact galvanometers and relays associated with hydraulic control valves for gas pressure regulators, with thermocouples designed to distribute the gas flow depending not only on changes in the temperature of the gas mixture d contact devices, but also the gas pressure fluctuations in trubonrovode.