The method of tessera create aerodynamic mode streams of products of combustion in the reaction chamber of the thermal reactor installation claus

 

(57) Abstract:

The invention is intended to obtain sulfur from hydrogen sulfide. The way to create aerodynamic mode streams of products of combustion in the reaction chamber of thermal reactor installation Claus involves feeding and combustion air to acid gas in combustion devices of the reactor with the formation at the entrance to the reaction chamber directed towards each other rotating vortices of combustion products along the axis perpendicular to the axis of the reactor. The rotation of the vortices are directed in different directions. The diameter of these vortices at the inlet to the reaction chamber is 0.35 - 0.45 diameter of the reactor, and the ratio of the average rotation speed included in the burner sour gas and air to their axial velocity is in the range of 4 to 6, the average residence time of combustion products in the reaction chamber is determined by the formula = 0,4 + a, where "a" depends on the concentration of hydrogen sulfide in acid gas and is given in the following intervals:

The concentration of hydrogen sulfide,% -,

70-95 - 0,15

50 - 60 - 0,25

40-50 - 0,60

35-40 - 0,70

This invention enables to obtain maximum yield of sulfur with minimal time spent productiono to the Claus process for sulfur from hydrogen sulfide.

The closest in technical essence to the present invention is a method of creating aerodynamic mode streams of products of combustion in the reaction chamber of thermal reactor installation Claus (see RF Patent N 1600074, IPC 5 B 01 J 19/26, 1989), including the flow and the combustion air to acid gas in combustion devices of the reactor with the formation at the entrance to the reaction chamber rotating vortices combustion products are directed towards each other along the axis perpendicular to the axis of the reaction chamber.

The disadvantage of this method is the lack of quantitative values characterizing parameters of a rotating vortices, providing maximum yield of sulfur with a minimum residence time of combustion products in the reaction chamber.

This invention solved the technical problem of creating in the reaction chamber of thermal reactor installation Claus drag mode providing for minimum stay of combustion products reaching thermodynamic equilibrium of the Claus process and obtain the maximum yield of sulfur.

The solution of this problem is achieved in that in the method of creating aerodynami the surrounding flow and combustion air to acid gas in combustion devices of the reactor with the formation at the entrance to the reaction chamber directed towards each other rotating vortices of combustion products along the axis perpendicular to the axis of the reactor, the rotation of the vortices are directed in different directions, and the diameter of these vortices at the inlet to the reaction chamber is 0.35 - 0.45 diameter of the reactor, and the ratio of the average rotation speed included in the burner sour gas and air to their axial velocity is in the range of 4 to 6, the average residence time of combustion products in the reaction chamber is determined by the formula = 0,4+a, where "a" depends on the concentration of hydrogen sulfide in acid gas and is given in the following intervals:

The concentration of hydrogen sulfide,% a,

70 - 95 - 0,15

50 - 60 - 0,25

40 - 50 - 0,60

35 - 40 - 0,70

This solution is illustrated in the drawing, which shows the diagram of thermal reactor of the Claus process in the plan.

The reactor comprises a reaction chamber 1 is placed with its end face on the side surface coaxially to each other additional cylindrical chamber 2 with burners 3 and the boiler heat exchanger 4. The axis of the reaction chamber 1 and camera 2 are mutually perpendicular. The burner 3 is posted in cameras 2 tangentially.

The method is as follows.

For carrying out the process of separating sulphur from sour gas in the reactor, which has a diameter D=4 m, length L=10 m and the volume is tangentially sour gas with a flow rate of QK. g=60000 m3/h and the air Qin=75000 m3/h under normal conditions (Tn=293K and Pn=0.1 MPa). Sour gas has the following composition, %:

The hydrogen sulphide - 48

Carbon dioxide - 46

Water vapor is 5.5

Metal - 0,5

The process of separating sulphur from sour gas in the reactor is held at an average temperature Tp=1273 K and pressure P=Is 0.135 MPa.

Air and acid gas received in the burner and have an average linear speed of V1=67 m/s and the average axial velocity V2=15 m/s, and the diameter of the formed vortices products of combustion at the inlet to the reaction chamber is d=1.8 m, hence d/D=1,8/4=0.45 respectively, and the ratio of the speed of rotation of the vortices to the speed of axial movement is equal to V1/V2=67/15=4,5.

For the concentration of hydrogen sulfide in acid gas 48% of the value of a=0,6 C.

The estimated minimum time of combustion products in the reaction chamber is determined by the formula = 0,4+a and is, therefore, a = 0,4+0,6 = 1.0 c.

The current consumption of acid gas and air adjusted in temperature and pressure in the reaction chamber was

< / BR>
= V/Q=126/121=1,04

The actual output of sulfur equal to 60%, and thermodynamic - 63%.

The way to create Aero is, kiuchumi flow and combustion air to acid gas in combustion devices of the reactor with the formation at the entrance to the reaction chamber directed towards each other rotating vortices of combustion products along the axis perpendicular to the axis of the reactor, characterized in that the rotation of the vortices are directed in different directions, and the diameter of these vortices at the inlet to the reaction chamber is 0.35 - 0.45 diameter of the reactor, and the ratio of the average rotation speed included in the burner sour gas and air to their axial velocity is within 4 - 6, the average residence time of combustion products in the reaction chamber is determined by the formula = 0,4 + a, where "a" depends on the concentration of hydrogen sulfide in acid gas and is given in the following intervals:

The concentration of hydrogen sulfide,% -,

70 - 95 - 0,15

50 - 60 - 0,25

40 - 50 - 0,60

35 - 40 - 0,70

 

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