SU1157067A1 - High-temperature air (gas) heater - Google Patents

Abstract

1. HIGH-TEMPERATURE HEAT. SPIRIT-GAS-HEATER, containing connected nozzle chambers .4 I 1, 1 liii I B: 1ELI01; And to a superior combustion chamber, characterized in that, with a chain of heating efficiency, blowing and simplifying repair and construction, the nozzle chamber. They are made in the form of toroids located in a coaxal combustion chamber along its height, and are connected in series with each other by lined nozzles with compensators, and the ratio of the areas of the connecting nozzles and the inner nozzle chamber is 1:

Description

one

The invention relates to ferrous metallurgy, in particular to the designs of blast furnace air heaters, and can be applied in all areas of the national economy where high-temperature heating of a lawn is required.

The purpose of the invention is to increase the efficiency of heating to blow and simplify the repair and construction of air-gas preheaters.

On .fig. 1 shows an air heater, vertical section; in fig. 2 chamber nozzles, horizontal section.

An air-gas heater consists of a nozzle chamber formed by successively mounted one above another trorads of nozzle chambers 1-3, a combustion chamber 4 with a dome 5, a burner 6, lined nozzles 7 with compensators 8, through which the individual toroids are interconnected. Nozzle chambers 1-3 are kept on foundation 9 by means of metal structures 10. Air o-gas preheater is equipped with a cold-blowing gate 11 and 12 hot, a smoke pipe 13, a smoke valve 14, and a smoke nozzle 15. A partition 16 is installed inside the nozzle chamber for directional exit gases forming a cavity with the nozzle 17. The combustion chamber 4 and the nozzle chamber 1 are connected by means of a pipe 18 with a compensator 19. The combustion chamber 4 is connected to a hot-air path of the furnace by hot-air choke 20.

Air-gas heater works as follows.

In heating chambers 1-3, during the heating period, heat accumulated from the combustion of gas in the combustion chamber 4 produced by the burner 6. The combustion products, lifting up under the dome 5 of the combustion chamber 4, pass through an 18-g nozzle. 2), into the upper chamber 1 of the nozzle, pass it around the ring, and through the lined nozzle 7 - into the chamber 2 nozzles and then into the chamber 3. Then through the smoke nozzle 13 and the open valve 14 - into the bore 15. At the same time, the gate cold blowing 11 and hot of which 12 are closed. During the period of blowing the heated medium (gas, cold blast) enters through the smoke pipe 13 with open dampers cold blowing 11 and mountains 672

of which 12 and the closed smoke valve 14 along the path opposite to the movement of the combustion products enters the combustion chamber 4 and, through the choke fitting, blow 20; into the path of the burning blow.

In this case, the engine room occupied by such an air-gas heater in the workshop as compared with vertical ones can remain the same, but the height of the apparatus is reduced in

2-3 times. Comparison of the proposed air-gas heater with the known horizontal gives a reduction in the area in the shop under a single air-gas heater, therefore, under a whole block of air-gas heaters.

In the proposed design, the air-gas heater maintains low compressive loads on the nozzle and lining, which ensures reliable operation at temperatures

under the dome 1500 - leOOC.

The proposed air-gas heater design allows for the repair of separate blocks, up to replacing the whole worn-out train with a new, in advance

prepared, which reduces the time of repairs and their complexity.

The unit of air and gas preheaters achieves the greatest compactness, if the combustion chamber is moved outside the chamber, the nozzles,

then the number of combustion chambers per block can be reduced from 4 to 2.

At the same time, the space inside the toroid-shaped chamber of the nozzle, which previously (Fig. {And 2) was occupied by the combustion chamber, is reduced to the minimum possible production of the casing of the chamber of the nozzle according to the processability. The minimum possible number of combustion chambers per unit of air: ho-gas heaters is 2. If there is only one combustion chamber per unit, stopping it for repair leads to stopping of the whole air-gas heater unit. The connecting pipes 7 are selected from the condition that the ratio of the areas of the connecting pipes to the inner chamber of the nozzle is 1: 3-1: 4. If the area ratio is greater than 1: 3, then the durability of the lining is reduced by loosening the ring in the region where the nozzle is introduced into the nozzle chamber; if the ratio of areas is less than 1: 4, then gas-and-ammonia losses increase due to the increase in air and smoke velocities.

Claims (2)

1. HIGH TEMPERATURE WHO- .. ДУ ХО-Г АЗСОГЕГАВ economizer containing interconnected nozzle chambers 4 5 in. and an external combustion chamber, characterized in that, in order to increase the efficiency of heating the blast and simplify repair and construction, the nozzle chamber. made in the form of toroids located coaxially to the combustion chamber along its height and connected in series with each other by lined pipes with compensators, while the ratio of the areas of the connecting pipes and the internal chamber of the nozzle is 1: (3-4). 2. Air-gas heater according to π. 1, characterized by the fact that in each toroid behind the connecting pipe a continuous vertical partition is installed along the smoke path. I