CN218175006U

CN218175006U - Oven gas guide tube device of hydrogen-rich carbon circulating furnace

Info

Publication number: CN218175006U
Application number: CN202222234759.9U
Authority: CN
Inventors: 季书民; 许晓兵; 贾志国
Original assignee: Xinjiang Bayi Iron and Steel Co Ltd
Current assignee: Xinjiang Bayi Iron and Steel Co Ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-12-30
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a baker air duct device of rich hydrogen carbon circulation stove adopts the gas medium, utilizes the flue gas that baker device burning produced to carry out the baker, makes whole blast furnace brickwork and furnace roof equipment progressively heat to being close the production state, and the moisture in the stoving blast furnace brickwork makes brick lining temperature reach 103 ~ 105 ℃, and 50h are no less than to dry time, and the carbon brick surface begins oxidation temperature control, and carbon brick surface oxidation temperature 450 ℃, baker temperature control is from 400 ℃, according to not exceeding 400 ℃ and heaing up. In order to ensure that the carbon bricks on the furnace bottom and the side wall of the furnace hearth can uniformly increase the temperature and dry the moisture, the furnace baking device is prepared according to 3 sets, 1 set is matched with cold air, 2 sets are combusted to generate smoke for heating, wherein one set of the matched cold air is mixed with two sets of the generated smoke, and the smoke temperature is controlled.

Description

Oven air duct device of hydrogen-rich carbon circulating oven

Technical Field

The utility model relates to a furnace drying air duct device of a hydrogen-rich carbon circulating furnace.

Background

Rich hydrogen carbon circulating furnace changes stove bottom carbon brick, stove outer covering, stove type, stave through production practice on the experimental basis of first, second phase, consequently has carried out the overhaul to rich hydrogen carbon circulating furnace, and the interior refractory material spraying of stove uses, and the furnace hearth lateral wall, stove bottom carbon brick are whole to be built by laying bricks or stones again, and the stove bottom is from up being in proper order down: 3 layers of 400mm microporous carbon bricks, 1 layer of 400mm ultramicropore carbon bricks and 1 layer of 345mm mullite ceramic pad, wherein the total thickness of the carbon bricks at the bottom of the furnace is 1945mm; the side wall of the hearth adopts a domestic high-quality large carbon brick and small ceramic cup structure, wherein the iron notch and the area below the iron notch adopt ultra-microporous carbon bricks; microporous carbon bricks are adopted in the area from the iron notch to the tuyere combined brick; and a small ceramic cup is built on the hot surface of the hearth carbon brick. Because the furnace bottom and the furnace hearth are built by carbon bricks, in order to dry moisture in the brickwork of the blast furnace, the carbon bricks of the furnace bottom and the furnace hearth need to be uniformly dried, the local overhigh temperature is prevented, the surface oxidation temperature of the carbon bricks is avoided by 450 ℃, the conventional traditional blast furnace generally adopts a blowpipe to directly send hot air into the furnace for drying the furnace, the method has good drying effect on the side wall, but the carbon bricks of the furnace bottom can not be dried, and the other method adopts a furnace drying guide pipe arranged on a part of a tuyere and guides the furnace bottom, although the method can dry the furnace bottom, the problems of disordered furnace airflow and non-uniform drying of the furnace bottom and the side wall of the furnace hearth exist.

Disclosure of Invention

Aiming at the defects of the baking oven, the utility model aims to provide a baking oven air duct device of a hydrogen-rich carbon circulating furnace.

The utility model adopts the technical proposal that: the utility model provides a baker air duct device of rich hydrogen carbon cycle stove, includes the furnace body and the baker device that is setting up respectively in the furnace body both sides, the vertical gas mixing pipe that is setting up in furnace body center, both ends are being connected through flue gas induction pipe and air induction pipe respectively about gas mixing pipe upper portion baker device, gas mixing pipe top level is setting up an upper portion guide plate, and the upper portion guide plate is the disc, and gas mixing pipe lower extreme level is setting up a lower part guide plate, and the lower part guide plate is ring shape, and lower part guide plate below is setting up the support, and lower part guide plate outer peripheral edge is close to furnace body lower part internal periphery, and furnace body upper portion and lower part are setting up stove bottom flue gas temperature detection device and furnace jar lateral wall flue gas temperature detection device respectively.

The utility model discloses a gas medium utilizes the flue gas that the baker device burning produced to carry out the baker, makes whole blast furnace brickwork and furnace roof equipment progressively heat to being close to the production state, and the moisture in the stoving blast furnace brickwork makes the brick lining temperature reach 103 ~ 105 ℃, and 50h are no less than to the stoving time, and the carbon brick surface begins oxidation temperature control, and carbon brick surface oxidation temperature 450 ℃, baker temperature control is from 400 ℃, according to not more than 400 ℃ intensification. In order to ensure that the carbon bricks on the furnace bottom and the side wall of the furnace hearth can uniformly increase the temperature and dry the moisture, the furnace baking device is prepared according to 3 sets, 1 set is matched with cold air, 2 sets are combusted to generate smoke for heating, wherein one set of the matched cold air is mixed with two sets of the generated smoke, and the smoke temperature is controlled.

The front end of the air inlet pipe is tightly connected with the baking oven device, the rear end of the air inlet pipe is connected with an upper opening of the gas mixing conduit, the air inlet pipe is cylindrical and connected with the gas mixing conduit through a intersecting line, and when air is mixed, only a combustion-supporting fan of the baking oven device is started to mix combustion-supporting air introduced into the gas mixing conduit with high-temperature flue gas, so that the proper baking oven flue gas temperature is achieved.

The gas mixing conduit is cylindrical, high-temperature flue gas and combustion-supporting air are mixed in the gas mixing conduit to reach a proper required temperature, and airflow is guided to the surface of the carbon brick of the hearth of the furnace bottom and the furnace hearth.

The top of the gas mixing duct is provided with an upper guide plate which is circular when overlooked and is a solid disc, and the upper guide plate is welded and sealed with the top of the gas mixing duct, so that the gas mixing duct has the functions of blocking smoke gas in the gas mixing duct from flowing upwards, enabling the smoke gas at the lower part to flow to the circumference and uniformly distributing the smoke gas to the furnace wall refractory materials above the tuyere for balanced heating.

Gas mixing pipe bottom set up the lower part guide plate, it overlooks for the ring shape, the centre bore matches with gas mixing pipe external diameter, inlay the welding with the bottom of gas mixing pipe, high temperature flue gas and the air mixing air current that flows out by gas mixing pipe are from lower part guide plate centre bore, flow to the furnace hearth bottom, evenly distribute hot flue gas to stove bottom carbon brick, reduce the flue gas velocity of flow simultaneously, improve flue gas heat utilization efficiency, evenly guide the furnace hearth lateral wall behind the heating stove bottom carbon brick, continue to heat the furnace hearth lateral wall, play the effect that flue gas flow deceleration all matches.

The utility model provides a baker air duct device of rich hydrogen carbon circulation stove can lead the stove bottom with hot flue gas, and the air current is even, evenly toasts stove bottom and furnace hearth lateral wall for the baker has the controllable and high advantage of heat utilization efficiency after reducing the air current velocity of flow of temperature.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a plan view taken along line a in fig. 1.

In the figure: 1-a furnace drying device, 2-a flue gas inlet pipe, 3-an air inlet pipe, 4-a gas mixing guide pipe, 5-an upper guide plate, 6-a lower guide plate, 7-a support, 8-a furnace bottom flue gas temperature detection device and 9-a furnace hearth side wall flue gas temperature detection device.

Detailed Description

The utility model provides a baker air duct device of rich hydrogen carbon cycle stove, as shown in figure 1, 2, including the furnace body and the baker device 1 that is setting up respectively in the furnace body both sides, the furnace body center is vertical to be set up a gas mixing pipe 4, both ends are being connected through flue gas induction pipe 2 and air induction pipe 3 respectively about gas mixing pipe 4 upper portion baker device 1, gas mixing pipe 4 top level is setting up an upper portion guide plate 5, upper portion guide plate 5 is the disc, and gas mixing pipe 4 lower extreme level is setting up a lower part guide plate 6, and lower part guide plate 6 is ring shape, and lower part guide plate 6 below is setting up support 7, and lower part guide plate 6 is close to furnace body lower part internal periphery, and furnace body upper portion and lower part are setting up stove bottom flue gas temperature detection device 8 and furnace jar lateral wall flue gas temperature detection device 9 respectively.

As shown in fig. 1 and 2, high temperature flue gas generated by a furnace baking device 1 passes through a flue gas inlet pipe 2, is uniformly mixed with cold air in a gas mixing conduit 4 through an air inlet pipe 3 to reach the temperature required by the furnace baking, is introduced into the furnace bottom through the gas mixing conduit 4, is uniformly guided to the carbon bricks on the side walls of the furnace bottom and the furnace hearth by a guide plate 6 on the lower part of the furnace bottom, controls air flow through a guide plate 5 on the upper part, uniformly heats the microporous carbon bricks below a tuyere, uniformly flows upwards along the furnace wall, and is continuously baked with spray paint in the furnace and inlaid bricks on a cooling wall. After the temperature is detected by the furnace bottom flue gas temperature detection device 8 and the furnace cylinder side wall flue gas temperature detection device 9, an electric signal is transmitted to the drying furnace device 1 to automatically adjust the opening degree of a gas and air adjusting valve, so that the purpose of controlling the proper drying furnace temperature is achieved.

Claims

1. The utility model provides a baker air duct device of rich hydrogen carbon circulation stove, includes the furnace body and is setting up the baker device respectively in furnace body both sides, characterized by: furnace body center is vertical to be set up a gas mixing pipe, both ends are being connected through flue gas induction pipe and air induction pipe respectively about gas mixing pipe upper portion baker device, gas mixing pipe top level is setting up an upper portion guide plate, the upper portion guide plate is the disc, gas mixing pipe lower extreme level is setting up a lower part guide plate, the lower part guide plate is ring shape, lower part guide plate below is setting up the support, lower part guide plate outer peripheral edge is close to furnace body lower part internal periphery, furnace body upper portion and lower part are setting up stove bottom flue gas temperature detection device and furnace jar lateral wall flue gas temperature detection device respectively.