SU1167203A1 - Device for controlling temperature of combustion products of blast furnace air heaters - Google Patents

Abstract

The device for regulating the temperature of the combustion products of a domain air heater, containing a combustible gas collector, a combustion air collector, a smoke duct connected by one end to a boron through a smoke exhauster and the other with a combustion chamber of the air heater of the burner, one of the samples, and one of the samples had a sample of the one of the samples and the one of the samples and the one of the samples and the one of the one of the participants, the one of the samples, the one of the samples, the one of the samples, the one of the samples, the one of the burners, one burner, one burner, one burner, one burner, one burner, one by one, one by one, one by one, one by one, one by one, one for the combustion chamber, one for the combustion heater, one for one, one for one, one for one by one, one for one, one for one, one for one, one for the burner, one for combustor, one for burner. blowing, simplifying the device and increasing its efficiency, the smoke pipe is inserted into the gas annular channel of each burner by means of a nozzle and equipped with regulating m choke placed at a distance (L 2-3 nozzle diameters from the point of connection.

Description

The invention retards to ferrous metallurgy, E in particular, to devices for controlling the temperature of the combustion products under the dome of the blast-air heaters. A device for controlling the temperature under the dome of the blast furnace heater is known during the heating period due to a change in the combustion air flow rate. When the desired temperature is reached under the dome, its further increase is limited by the supply of an additional amount of combustion air, which is ballast, and, accordingly, requires an increase in heat consumption. L Disadvantages of this device. are the need to use combustion air not for its intended purpose, heat loss with excess air, but also the energy consumption for its supply, which, under conditions of intensification of heating of existing air heaters, is aggravated by the limited power of the combustion air fans. Closest to the invention is a device for controlling the temperature under a dome of air heaters, including a Combustible gas collector, a combustion air collector, a double duct, connected by a single condom with a hog through a smoke exhauster and a Drum-um - with a combustion chamber of an air heater 2j, A disadvantage of the known The device requires the installation of a reliable water-cooled shut-off valve, which complicates the design and operation of air heaters. The purpose of the invention is to increase the performance of the air heater and the temperature to blow, simplify the device and increase the effectiveness of its operation. The goal is achieved by the 4-JTO in the control device: the temperature of the combustion products of the domain heaters, containing a combustible gas collector, combustion air collector, five-pipe, connecting one, with bora through the exhaust fan 5 and the other with the combustion chamber of the air heater of the burner, smoke pipe by means of a pipe it is temporary in the gas ring. Bo: the channel of each burner is equipped with a reg / ly 0. The demeanor is located at a distance of 2-3 times the diameter of the pipe from the place of cutting. Pa Fig 1 shows the layout of the device; on shchg. 2 cxet / ia inserts into the gas pipe of the nozzle The device contains air heaters 1, burners 2, gas pipeline 3 of the blast gas (fuel), combustion air pipe 4, inert gas pipe 5, inert gas exhaust fan 6 or another blower, inert gas supply pipe 7 regulating The choke 8, FIG. 2, shows the scheme of the inset: in the gas pipeline 3 of the blast gas of the inert gas supply nozzle 7 with the installation of the throttle 8. The device works as follows. When the heater 1 is turned on for heating, the temperature of the dome rises sharply to a predetermined (for example, up to 1300 ° C) with a minimum coefficient of air flow, ensuring complete combustion of the combustible gas (analog operation). . The heat of combustion of gas used in the air heaters at present is 1,000-1,150 kca.p / m, which makes it possible to heat the dome of the space up to 1,500 ° C or more. After reaching the dome of the temperature-resistant refractory set at the conditions of (t 1300 ° C), the signal is given to open the throttles 8. At that, the required amount of inert gas enters the burner 2 through the nozzle 7. When 13 combustion chamber of inert and combustible gases is mixed, the heat of combustion per unit volume of combustible gas decreases, which limits the temperature rise under the dome above a predetermined .. In the period of blowing, the throttle 8 is in closed positions. The connection of the inert gas feed nozzle 7 at a right angle does not exclude other insertion options. Of the conditions for reducing the energy losses of gases from local hydraulic resistance. The installation of the throttles 8 at the place of insertion at a distance of 2-3 times the diameter of the nozzle 7 is caused by the following. At a distance of less than 2 diameters, the operation-fs R of throttles is difficult, and its smoothness is also deteriorated.

neither because of the gurbulization of the flows in the city; the implementation of the proposed device; over a distance of more than 3 diameters. This allows to increase the production - there is no compactness of the device. new In the range of 2-3 diameters; bake flow stabilization after 5 throttles and compactness of burner installation, efficiency of the air heater, increase the temperature to blow, which generally results in coke saving and saving about 100 thousand rubles.

in one stove.

Gas

Inert

Wj

V

Claims (1)

'' DEVICE FOR CONTROLLING THE TEMPERATURE OF DOMAIN HEATER COMBUSTION PRODUCTS, containing a combustible gas manifold, a combustion air collector, a chimney connected at one end to a boron through a smoke exhaust and the other to a combustion chamber of the burner air heater, which increases the output so that blowing temperature, the device to simplify and improve its efficiency, dymoprovod through pipe embedded in each of the gas ring channel and go- _Λ Relkom provided regulatory d OC 3 mudflow, placed at a distance of 2-3 pipe diameters from the point of connection