CN201386111Y

CN201386111Y - Pipeline blast temperature adjusting mixed air structure

Info

Publication number: CN201386111Y
Application number: CN200920105543U
Authority: CN
Inventors: 陈冠军; 胡雄光; 蔡景春; 郑敬先
Original assignee: Shougang Corp
Current assignee: Shougang Group Co Ltd
Priority date: 2009-02-24
Filing date: 2009-02-24
Publication date: 2010-01-20
Anticipated expiration: 2019-02-24

Abstract

A pipeline blast temperature adjusting mixed air structure belongs to the technical field of hot-wind pipeline of iron-smelting blast furnace in steel industry and comprises a high-temperature pipeline, a cold-air pipeline, a circulation channel, a cold-air spout and a turbulence brick and other parts, wherein the cold-air pipeline is connected with one circulation channel in the high-temperature pipeline; the tail end of the circulation channel is provided with 10-30 sprouts; and the central line of the sprout is tangent to the high-temperature pipeline which is internally installed with a turbulence brick. The structure can lead the temperature of high temperature wind of 1200-1300 DEG C to be quickly reduced, stabilizes the wind temperature used by the blast furnace, meets the requirements of stabilized wind temperature of the blast furnace, and has the maximum range of temperature reduction of 100-150 DEG C.

Description

A kind of pipeline wind-warm syndrome is regulated and is mixed the wind structure

Technical field

The utility model belongs to Iron And Steel Industry iron-smelting blast furnace hot air duct technical field, particularly relates to a kind of pipeline wind-warm syndrome and regulates and mix the wind structure, mixes at high temperature wind under the situation of part cold wind and uses.

Background technology

Along with the continuous progress of ironmaking technology, modern blast furnace develops to directions such as efficient, high wind-warm syndrome and longevities.Blast furnace system is made of equipment such as blast-furnace body, hotblast stove and air supply duct systems thereof, and the wind-warm syndrome that hotblast stove provides generally is higher than blast furnace and uses wind-warm syndrome, mixes the wind structure and be that the air supply duct system is used to regulate and stable blast furnace uses the device of hot blast temperature.

At present, the mixed wind structure on the air supply duct has a lot of different decoration forms, has by the simple blended of threeway form, also is provided with and mixes wind furnace form blended, has hot blast to feed cold air duct and mixes, and also has cold wind to feed the hot air duct blended.Along with the raising of blast furnace use wind-warm syndrome, the wind-warm syndrome that hotblast stove provides is more and more higher, and the wind-warm syndrome of air supply duct requires more and more higher.Because hot blast overtemperature and uneven in temperature, cause pipeline to burn red, problems of crack, simultaneously the mixed wind system of air supply duct is because the influence of the restriction of its structure and long-pending cold long-pending heat, causes mixing wind tube road periphery cracking and burns redly, can't satisfy the needs that high wind-warm syndrome line-blending is regulated wind-warm syndrome.

The mixed wind system that original air supply duct adopts mixer selector valve to regulate, adopt threeway or four cold wind mouths of endless tube hybrid mode, although structure design is simple, but often find that in use hot blast seals in cold air duct, red and the cracking of burning that causes cold air duct, mix back wind-warm syndrome skewness in long air supply duct, cause the preceding wind-warm syndrome inequality of blast-furnace tuyere, can't satisfy blast furnace and use stable and the evenly requirement of wind-warm syndrome.

Summary of the invention

The purpose of this utility model is to provide a kind of pipeline wind-warm syndrome to regulate and mixes the wind structure, adopt cold wind eddy flow and flow-disturbing technology, not only effectively alleviate the problem of hot blast string cold air duct, simultaneously can realize high temperature wind fast cooling, reach even wind-warm syndrome as early as possible, reduce pipeline and red, the problems of crack of localized hyperthermia's burning occurs.Overcome present blast-furnace hot-air pipeline wind-warm syndrome and regulate the defective that exists, improve cold and hot wind mixed structure, make and realize uniform decrease in temperature in the high temperature wind short period of time, cold and hot wind reaches as early as possible and mixes, reducing pipeline localized hyperthermia burns red and cracking, satisfy blast furnace and use the requirement decide the wind-warm syndrome operation, prolongation high-temperature pipe work-ing life.

The utility model comprises high-temperature pipe, cold air duct, circuit and parts such as cold wind spout and flow-disturbing brick.Cold air duct links to each other with a circuit in the high-temperature pipe, 10～30 spouts of the terminal layout of circuit, and spout medullary ray and high-temperature pipe are tangent, and the flow-disturbing brick is installed in the high-temperature pipe.This structure can be lowered the temperature 1200～1300 ℃ high temperature wind rapidly fast, stablizes blast furnace and uses wind-warm syndrome, satisfies blast furnace and decides the wind-warm syndrome requirement, and its maximum cooling extent is 100～150 ℃.

The perpendicular or parallel layout of cold air duct described in the utility model and high-temperature pipe, cold air duct diameter are 0.3～0.6 of high-temperature pipe diameter.

Cold air duct described in the utility model and spout passage join with circuit front end and end respectively, and cold wind flows to distinguished and admirable to consistent with high temperature in the circuit.

The cold wind nozzle configuration of arranging in the high-temperature pipe wall described in the utility model can be circular or square, and the angle of spout medullary ray and high-temperature pipe plumb cut is 30～60 °, and the tangential circle diameter that the spout medullary ray forms is 0.2～0.6 of a high-temperature pipe diameter.

The flow-disturbing brick of installing in the high-temperature pipe described in the utility model is 2～4 rows, staggered arrangement, and every row is 2～6.

Flow-disturbing brick described in the utility model is shaped as rectangle or T shape, and flow-disturbing brick medullary ray is 20～45 ° with the vertical circle of contact medullary ray angle of cut, and the flow-disturbing brick and the high-temperature pipe medullary ray angle of cut are 60～90 °.

Pipeline wind-warm syndrome of the present utility model is regulated mixed wind structure and is installed and used on hot air duct, and the advantage that has is as follows:

1 fast cooling.Its temperature fall time and conventional threeway hybrid mode compare, and the time shortens greatly.

2 mixed wind are even.Further improve by wind-warm syndrome homogeneity behind eddy flow and the flow-disturbing.

3 is simple in structure, easy for installation.Need not to install redundant equipment, utilize existing blast-furnace hot-air pipelining flow deflector and offer circuit and spout gets final product.

4 mix wind precision height.Control turns down 1% of valve opening before the mixing wind tube road, can reduce by 1～1.5 ℃ of wind-warm syndrome.

Description of drawings

Fig. 1 is that the utility model pipeline wind-warm syndrome is regulated mixed wind structural representation.Wherein, cold air duct inlet 1, cold air duct 2, cold wind spout 3, high-temperature pipe 4, circuit 5, cold wind spout passage 6, high temperature tube wall 7, flow-disturbing brick 8, the outlet 9 of mixing wind tube road and flow-disturbing brick 10.

Fig. 2 is that the utility model pipeline wind-warm syndrome is regulated mixed wind structure A-A diagrammatic cross-section.

Fig. 3 is that the utility model pipeline wind-warm syndrome is regulated mixed wind structure B-B diagrammatic cross-section.Wherein, the circle of contact 11.

Fig. 4 is that the utility model pipeline wind-warm syndrome is regulated mixed wind structure C-C diagrammatic cross-section.

Fig. 5 is that the utility model pipeline wind-warm syndrome is regulated mixed wind structure D-D diagrammatic cross-section.

Fig. 6 is that the utility model pipeline wind-warm syndrome is regulated mixed wind structural system enforcement synoptic diagram.Wherein, cold air duct 12, hotblast stove 13, blower fan 14, hot air duct 15, high-temperature valve 16, cold blast valve 17, mixing wind tube road 18, pipeline wind-warm syndrome are regulated and are mixed wind structure 19, blast furnace 20.

Embodiment

The mixed wind structure embodiment of pipeline wind-warm syndrome adjusting of the present utility model is as follows.Regulate mixed wind structure 19 inside in the pipeline wind-warm syndrome, as shown in Figure 1, cold wind enters high-temperature pipe 4 through cold air duct inlet 1, cold air duct 2, circuit 5, cold wind spout passage 6 and cold wind spout 3 with the circle of contact 11 tangent eddy flows, mix with the high temperature wind in the high-temperature pipe 4, mix hot blast and flow out from mixing wind tube road outlet 9 through flow-disturbing brick 10, flow-disturbing brick 8.System implementation as shown in Figure 6, the ratio of the cold wind 75～90% that is entered by blower fan 14 enters on air hotblast stove 13 heating backs from becoming high temperature wind, from hot air duct 15 outlets, enter the pipeline wind-warm syndrome through high-temperature valve 16 and regulate mixed

wind structure

19,10～25% ratio cold wind enter the mixed wind structure 19 of pipeline wind-warm syndrome adjusting through cold air duct 12 and cold blast valve 17, regulate the mixing hot blast that mixes wind structure 19 through the pipeline wind-warm syndrome, be sent to blast furnace 20, use the particular requirement wind-warm syndrome for it through mixing wind tube road 18.

Claims

1, a kind of pipeline wind-warm syndrome is regulated and is mixed the wind structure, comprises high-temperature pipe, cold air duct, circuit and cold wind spout and flow-disturbing brick; It is characterized in that cold air duct links to each other with a circuit in the high-temperature pipe, 10～30 spouts of the terminal layout of circuit, spout medullary ray and high-temperature pipe are tangent, and the flow-disturbing brick is installed in the high-temperature pipe.

2, pipeline wind-warm syndrome according to claim 1 is regulated and is mixed the wind structure, it is characterized in that, and the perpendicular or parallel layout of cold air duct and high-temperature pipe, the cold air duct diameter is 0.3～0.6 times of high-temperature pipe diameter.

3, pipeline wind-warm syndrome according to claim 1 is regulated and is mixed the wind structure, it is characterized in that cold air duct and spout passage join with circuit front end and end respectively, and cold wind flows to distinguished and admirable to consistent with high temperature in the circuit.

4, pipeline wind-warm syndrome according to claim 1 is regulated and is mixed the wind structure, it is characterized in that, the cold wind nozzle configuration of arranging in the high-temperature pipe wall is circular or square, the angle of spout medullary ray and high-temperature pipe plumb cut is 30～60 °, and the tangential circle diameter that the spout medullary ray forms is 0.2～0.6 times of high-temperature pipe diameter.

5, pipeline wind-warm syndrome according to claim 1 is regulated and is mixed the wind structure, it is characterized in that, the flow-disturbing brick of installing in the high-temperature pipe is 2～4 rows, staggered arrangement, and every row is 2～6.

6, pipeline wind-warm syndrome according to claim 1 is regulated and is mixed the wind structure, it is characterized in that the flow-disturbing brick is shaped as rectangle or T shape, and flow-disturbing brick medullary ray is 20～45 ° with the vertical circle of contact medullary ray angle of cut, and the flow-disturbing brick and the high-temperature pipe medullary ray angle of cut are 60～90 °.