SU1469266A1 - Furnace for burning sulphur - Google Patents

Description

(21) 4251636 / 23-02

(22) 03/06/87

(46) 03/30/89. Bnhl. № 12

(72) V.I. Pavlovsky, A.P. Shel kin

ON. Klimov and N.E., Kondakov

(53) 621.365.411 (088.8)

(56) Vasiliev B.T., Shelkin A.K. Burning installations. Review NIITEKHIM, M., 1985, p. 5-8, fig. one.

(54) FURNACE OVEN

(57) The invention relates to the design of furnaces for burning sulfur in sulfuric acid production. The purpose of the invention is to reduce the content of nitrogen oxides in furnaces when sulfur is burned in them. The design of the furnace consists of a horizontal cylindrical chamber lined with refractory bricks and divided by partitions into a number of zones. Sulfur nozzles and nozzles for air supply are installed on the end wall along the furnace axis. In the first partition there is a hole that forms a refractory brick collar with the bottom of the furnace. The hole area is 5-10% of the total cross section of the furnace. 1 hp f-ly, 2 ill.

one

The invention relates to the design of sulfur burning furnaces in sulfuric acid production.

The purpose of the invention is to reduce the content of nitrogen oxides in the finished product by eliminating the local high temperature zone.

FIG. Figure 1 shows a furnace for combustion of sulfur, a general view; figure 2 - section aa in Fig, 1.

The furnace is a horizontal cylindrical chamber, Fz, heated by a refractory brick, divided by transverse partitions.

1n a number of zones. Nozzles are installed on the end wall of the furnace along its axis

2dl of sulfur supply and nozzle 3 for air supply, and in the lower part of the first partition there is an opening 4 for the flow of a part of gas.

The furnace works as follows. Liquid sulfur sprayed by nozzles 2 burns in a torch in the volume of the furnace space. Largest

drops settle to the bottom of the chamber. The air supplied from the nozzles 3 ensures stable combustion of sulfur. The DL-containing gas passes through the interstitial walls 1, connecting with the gas passing through the opening 4, and then sent to the waste-heat boiler.

Hole 4 in the first partition ensures the flow of more hot gases from the bottom of the combustion chamber. and the flow of colder gases into it. This eliminates the local zone with high temperature and reduces the content of nitrogen oxides in flue gases.

The formation of nitrogen oxides when burning sulfur in. Depending on the temperature in the working area, it is calculated from

. p (0.0206T - 324),

where T is the temperature in the combustion zone; - the residence time of gases in this zone.

/)

WITH

but with to

O5 O

It has been experimentally established that increasing the hole to more than 10% of the furnace cross section results in unburned sulfur slipping behind the furnace, which leads to violation of production schedules, and reducing the hole to less than 50% does not significantly affect the nitrogen oxide content in the furnace gas.

Claims (2)

1. A sulfur burning furnace containing a horizontal cylindrical chamber lined with refractory bricks, divided into zones river partitions, and sulfur nozzles and air nozzles installed on the end wall, in order to reduce the content of nitrogen oxides in the finished product by eliminating the local high temperature zone, in the first relatively in the end wall with nozzles partition A hole is made above the bottom level, the cross-sectional area of which is 5-10% of the cross-sectional area of the furnace. 2. A furnace according to claim 1, characterized in that the hole is molded in the form of an arch. FIG. 2