SU927291A1 - Gas converter - Google Patents

Description

(5) GAS CONVERTER

I

The invention relates to chemical reactor designs and can be applied in the manufacture of synthetic products by converting, for example, in the manufacture of blue-metal; acid.

Converters are known, comprising a housing within which a catalyst grid is installed, a cover and nozzles for supplying and discharging gases, the housing below the catalyst grid being lined with refractory brick Cl 3.

The disadvantage of these structures is the low yield of the process gas, since it is not quenched. In addition, these devices are not applicable in the production of toxic gases, since the latter are absorbed in the pores of the lining, which further excludes routine inspection and repair of the converter.

A gas converter is also known, comprising a housing with a heat exchange jacket, inside which a catalyst grid is installed, a cover and nozzles for supplying and discharging gases 2,

The disadvantages of this device are low productivity due to poor gas quenching, which leads to a decrease in the yield of the target product, as well as low reliability due to uneven cooling of the jacket.

The purpose of the invention is to increase productivity and ensure reliability.

Claims (2)

This goal is achieved by the fact that the apparatus is equipped with water-cooled pipes, reinforced inside the housing under the catalyst grid, and connected to a heat-exchange jacket, and a partition placed in the heat-exchange jacket between the upper and lower ends of the water-cooled pipes. Figure 1 shows the Converter, a longitudinal section} in figure 2 - section A-A in figure 1. The gas converter comprises a housing 1 with a heat exchange jacket 2, inside which is installed a catalyst grid 3, a cover and nozzles 5 and 6 for the supply and removal of gases. Inside the housing 1, a catalyst grid 2 contains water-cooled pipes 7 connected to a jacket 2, in which a partition 8 is placed between the ends of the pipes 7, forming annular gaps Ei 10, which communicate between each other 8 of the upper 11 and lower 12 parts of the heat exchange cushion 2. Case 1 is equipped with nozzles 13 and 14, the middle of which is the heat exchanger head 2 and pipes 7 are connected by pipelines 15 and 1b to the drum separator 17. The converter works as follows: “Contact gas, for example, a mixture of ammonia, methane and oxygen with temperature 2b- 0 ° C enters through the pipe 5 into the housing 1, passes before the heated catalyst grid 3j, where its conversion takes place, i.e. The formation of hydrocyanic acid as a result of the oxidation of methane and ammonia During the conversion process on the catalyst grid 3, the gas is heated to a high temperature (UHL and then enters the lower part of housing I, where it releases its heat-exchanging jacket 2 and the water-cooled pipes 7. The cooled converted gas is removed through the pipe 6 of the housing 1 for further technological processing. The heat of the gas perceived by the heat-exchange jacket 2 and the cooled pipes 7 is transferred to the water entering the bottom 12 of the heat exchange jacket 2 from the separator drum 17 via pipe 15; through the pipe 13; the water passes through the annular gap 9 and the cooled pipes 7 collects the heat Noy of the jacket in the upper part 1t; 2, from which it is discharged through the pipe 16 through the pipe 16 to drum separator 17. In drum separator 17, the steam is separated from the water and removed to process or energy needs, and the water, together with the make-up water, is returned to the converter. The drum separator 17) pipelines 15 and 16, the annular gap 9 of the heat exchange jacket 2 and the cooled pipes 7 form the circuit of the natural circulation of the cooling medium. Placing the partition 8 in the heat exchange jacket 2 ensures equality of the hydraulic resistances of the sections of the circulation loop, which include the heat exchange jacket 2 and the cooled pipes 7, which ensures reliable cooling due to the elimination of the possibility of stagnation of water in any area or overturning. In addition, the reliability is increased due to the presence of an annular gap 10 in the transfer jacket 2, through which water from the upper part 11 of the jacket 2 flows into the lower part 12, which leads to an improvement in the characteristics of the circulation circuit due to a decrease in pressure losses in the pipe 16, also due to the good distribution of water through pipes 7 from the lower part 12, which, like part 11, are the collector zones. Installing water-cooled pipes 7 in KopnVce 1 allows for an increase in both the heat exchange surface and the speed of the converted gas, as a result of which the gas is quenched, during which the gas formed during the conversion process is fixed and braking is inverse. reactions. This increases the yield of the process product and, consequently, the increase in productivity. Claims of the invention A gas converter, for example, for the production of hydrocyanic acid, comprising a housing with a heat exchange jacket, inside which is installed a catalyst grid, a cover and nozzles for supplying and discharging gases, characterized in that it is equipped with water-cooled pipes to improve performance and ensure reliability; reinforced inside the shell under the catalyst grid and connected to the heat exchange jacket, and a partition placed in the heat exchange jacket between the upper and lower ends of the water-cooler observable pipes. Sources of information 5 taken into account during the examination 1. Handbook of a nitrogen worker. N., Himi, 1968, t, P, p.58, fig.1-27. 2. Bobkov S.S. et al. Blue acid. M., Himi, .1970, p.117, fig.16. Iff