RU81489U1 - TAPERED CONTROL BURNER - Google Patents

Description

The utility model “Cone-controlled burner” relates to devices for mixing gaseous media, in particular for mixing acid gas and air, namely, the Claus thermal reactor. The device can be used in gas processing, oil refining and other industries.

The reactor of the thermal stage of the Klaus process is known, described in RU 2145257 C1, 02/10/2000, in which the mixing process is carried out in a cylindrical chamber and a tangentially mounted burner.

The disadvantages of this design are the lack of a device for preliminary mixing of air and acid gas, weak gas recirculation in the reactor volume and the uneven flow of combustion products along its axis. This leads to a decrease in the efficiency of the acid gas combustion process, inefficient use of the volume of the reaction space of the reactor, and a low degree of conversion of hydrogen sulfide.

The thermal stage of the Klaus process is also known, described in RU 2171776. In this design, preliminary mixing of air and gas is achieved by the fact that in the embrasure of the burner there is a divider in front of the acid gas supply pipes with a base diameter equal to 0.65-0.8 of the diameter of the cylindrical part of the embrasure burners. The burner is made in the form of two

concentric pipes for the introduction of acid gas located in the center of the embrasure of the burner.

The disadvantage of this design is that the mixing of air and acid gas occurs due to the divider and is unstable at different flow rates of the reagents.

The closest analogue is the burner described in RU 2171776. The disadvantage of the burner in a close analogue is that the uniform movement of the combustion products in the reaction chamber is achieved by the fact that the outlet opening of the burner embrasure is equal to 0.45-0.7 of the diameter of the reaction chamber and is located relative to the axis of the reactor with an eccentricity value of 0.05-0.2. That is, the main disadvantage of this type of burner is the lack of adjustment of the mixed flows.

The design goal of the proposed burner device is the optimal ratio of flow rates for combustion, achieved by regulating these speeds and the angle of attack of acid gas and air.

The problem solved by the utility model is to reduce the time to obtain the optimal ratio of flow rates and angle of attack of acid gas - air, as well as an increase in the degree of conversion of hydrogen sulfide and a decrease in the percentage of harmful substances in flue gases resulting from combustion.

The solution to the problem is achieved by the fact that the combustion process in the proposed design is adjustable both for acid gas and air.

The design of the adjustable gas sour gas burner shown in Fig. 1 includes a steering wheel for adjusting the speed of acid gas 1, a mobile cone-splitter of acid gas 2, a steering wheel for adjusting the speed of air 3, a movable air reflector 4, a brickwork of the combustion chamber 5, air flow 6 acid gas flow 7.

In the design, the adjustable burner is an acid gas cutter and an air reflector made in the form of cones,

installed in such a place and with such geometric characteristics that would ensure the most efficient use of the volume of the reaction space of the thermal reactor and reliable operation of the burner in all modes.

The efficiency and reliability of the burner is achieved by providing intensive mixing of the streams of acid gas and air by changing the direction and speed of the outflow of flows from the nozzles.

The implementation of the mixing process is as follows. Acid gas through its pipe enters in the direction of the furnace space and is partially reflected from the cone of the divider swirls and enters for mixing into the furnace chamber with an adjustable angle and flow rate.

Technological air flows in the same direction, which is also partially reflected from the cone divider, and receives a certain angle and speed for the air flow. Thus, acid gas and process air enter the combustion chamber with the optimal parameters (speed and angle of attack) before mixing, which ensures the mixture that is as close as possible to ideal at various operating conditions of the thermal reactor.

If it is necessary to adjust for acid gas, the control wheel for adjusting the acid gas is rotated and thereby the size of the gap for changing the desired angle of attack and the flow rate of acid gas is changed.

A similar adjustment of the angle of attack and air speed is carried out by the control wheel 3.

The cone-controlled burner ensures the efficiency and reliability of the burner, the necessary degree of conversion of hydrogen sulfide to sulfur, prevents the flame from slipping into the embrasure, and also increases the life of the burner and prevents premature wear of the fuel gas manifold.

Claims (3)

1. Cone-adjustable burner containing a divider for preliminary mixing of air, characterized in that the burner contains an acid gas divider made in the form of a cone, an air reflector made in the form of a cone, a helm for adjusting the speed and angle of attack of air, a helm for adjusting the speed and the angle of attack of acid gas. 2. Cone-controlled burner according to claim 1, characterized in that the acid gas divider, made in the form of a cone, is movable. 3. Cone-adjustable burner according to claim 1, characterized in that the air reflector, made in the form of a cone, is movable.