CN102485917A

CN102485917A - Oblique air supply device

Info

Publication number: CN102485917A
Application number: CN2010105712930A
Authority: CN
Inventors: 张昭贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-01
Filing date: 2010-12-01
Publication date: 2012-06-06

Abstract

The utility model provides an oblique air supply device, which consists of an expansion joint, an elbow, a blowpipe and a small tuyere sleeve. An included angle between a center line of the blowpipe and a horizontal line ranges from 3 degrees to 7 degrees and is close or equal to the inclination angle of the small tuyere sleeve. An included angle between flange surfaces at an inlet end and an outlet end of the elbow is an acute angle, and the acute angle degree of the included angle is equal to subtracting the degree of the included angle between the center line of the blowpipe and the horizontal line from 90 degrees. An included angle is formed between an outline surface of the largest-diameter circle on a middle sleeve assembling surface of the small tuyere sleeve and an end surface, which contacts with the blowpipe and is provided with water inlet and outlet pipes, of the small tuyere sleeve and is equal to the included angle between the center line of the blowpipe and the horizontal line. Pulverized coal can be sprayed into a blast furnace along the center line of the blowpipe without being stopped by an oblique channel surface of an existing tuyere, the probability that the small tuyere sleeve is worn by the pulverized coal is lowered, resistance loss due to turning of hot air at the tuyere is reduced, and simultaneously an observation viewing field of conditions in a tuyere front furnace from a sight hole is enlarged.

Description

A kind of inclination air-supply arrangement

Technical field

The invention belongs to technical field of blast furnace ironmaking, relate to blast furnace air-supply technology, especially relate to a kind of inclination air-supply arrangement.What the present invention also was applicable to COREX stove air port send the oxygen device.

Background technology

In existing blast furnace was produced, air-supply apparatus of blast furnace was to be the level of state with belly pipe to blow in stove through the air port.Pile up the problem that causes bottom, air port scaling loss for the district of circling round before the solution air port because of broken Jiao, present most blast furnaces have all adopted the skew wind mouth, and in fact become the actual disposition standard in the existing blast furnace production.In the case; The belly pipe medullary ray and the air port channel centerline of air-supply apparatus of blast furnace are angle to a certain degree; This angle is generally between 5～7 °; This has caused easy abrasion air port when the belly pipe medullary ray carries out coal injection, and when observing in the stove situation from peep hole along the belly pipe medullary ray, the visual field receives influence significantly.Especially at air port lengthening or after increasing obliquity, even cannot see the stove internal state.In addition, after blast furnace taked peep hole to insert the method for rifle coal powder injection, coal dust was able to abundant diffusion in hot blast, and the hot-air flow of this moment is when the air port is forced break-in, with the possibility that increases pyrogenous coal dust wearing and tearing air port.

Summary of the invention

The objective of the invention is to propose a kind of inclination air-supply arrangement, it can reduce the possibility in coal dust wearing and tearing air port, increases the visual field of the situation in the stove of observing from peep hole simultaneously.

A kind of inclination air-supply arrangement is made up of expansion joint, elbow, belly pipe, tuyere small sleeve, and the medullary ray of belly pipe and the angle between the sea line approach or equal the inclination angle of tuyere small sleeve between 3～7 °; This sea line is the medullary ray of existing each cover of blast-furnace tuyere; Elbow is imported and exported between the flange face at two ends institute, and to be angle be acute angle, and its acute angle value is 90 ° and deducts the medullary ray of belly pipe and the angle between sea line.

The angle of inclination of above-mentioned tuyere small sleeve is 9 ° to the maximum, and the present invention preferably equals the medullary ray of belly pipe and the angle between sea line.

Above-mentioned tuyere small sleeve contacts belly pipe and is installed into the end face of rising pipe, is vertical with the medullary ray of belly pipe.

The contoured surface of maximum diameter circle on the middle cover fitting surface of above-mentioned tuyere small sleeve contact belly pipe with above-mentioned tuyere small sleeve and is installed into and is angle between the end face of rising pipe and concerns that its angle equals the medullary ray of belly pipe and the angle between sea line.

The invention has the beneficial effects as follows:

The present invention changes belly pipe into heeling condition from existing horizontality; The angle that tilts is roughly consistent with the angle that the air port tilts; Can make from belly pipe and be blown into the hot blast of blast furnace and spray into the coal dust of blast furnace along the medullary ray of belly pipe; Not stopped by the surface channel after existing air port tilts, can reduce the chance of coal dust wearing and tearing tuyere small sleeve, and reduce the hot blast resistance damage that place's break-in causes in the air port.

Because the belly pipe medullary ray is roughly consistent with the air port channel centerline, when observing the situation in the inlet front end stove from peep hole along the belly pipe medullary ray, its visual field becomes greatly.Even perhaps increase under the situation of obliquity at the tuyere small sleeve lengthening, also can guarantee a bigger visual field.When the blast furnace regular job, this is favourable to understanding the circle round state in district of blast furnace.

Description of drawings

Fig. 1 is a topology view of the present invention.

In figure, 1 is expansion joint, and 2 is elbow, and 3 is belly pipe, and 4 is medullary ray, and 5 is sea line, and 6 is fitting surface; 7 is tuyere small sleeve, and 8 is medullary ray, and 9 is contoured surface, and 10 is end face.

Embodiment

As shown in Figure 1, a kind of inclination air-supply arrangement is made up of expansion joint 1, elbow 2, belly pipe 3, tuyere small sleeve 7, and the medullary ray 4 of belly pipe and the angle between the sea line 5 approach or equal the inclination angle ￠ 1 of tuyere small sleeve 7 between 3～7 °.This sea line 5 is the medullary ray of existing each cover of blast-furnace tuyere.Being angle between the flange face at elbow 2 import and export two ends is acute angle ￠ 3, and its acute angle value is 90 ° of angle ￠ 2 that deduct 5 at belly pipe medullary ray 4 and sea line.[0006] as among Fig. 1, the angle that the medullary ray 8 of tuyere small sleeve 7 passages and sea line are 5 is the inclination angle ￠ 1 of tuyere small sleeve 7, and this inclination angle ￠ 1 is 9 ° to the maximum, and the present invention preferably equals the angle ￠ 2 of 5 at medullary ray 4 and the sea line of belly pipe 3.[0007] as among Fig. 1, tuyere small sleeve 7 contacts belly pipes 3 and is installed into the end face 10 of rising pipe, is vertical with the medullary ray 4 of belly pipe 3.[0008] as among Fig. 1; The contoured surface 9 of maximum diameter circle on the middle cover fitting surface 6 of tuyere small sleeve 7; Contact belly pipe 3 with above-mentioned tuyere small sleeve 7 and be installed between the end face 10 of rising pipe and be the angle relation, its angle ￠ 4 equals the angle ￠ 2 of 5 at medullary ray 4 and the sea line of belly pipe 3.

In Fig. 1 and foregoing description, expansion joint 1, belly pipe 3, each cover of air port, middle cover, water inlet pipe and water outlet pipe are the prior art content.Figure of description 1 is a Figure of abstract.

Claims

1. an inclination air-supply arrangement is made up of expansion joint, elbow, belly pipe, tuyere small sleeve, it is characterized in that: the medullary ray of belly pipe and the angle between the sea line approach or equal the inclination angle of tuyere small sleeve between 3～7 °; Elbow is imported and exported between the flange face at two ends institute, and to be angle be acute angle, and its acute angle value is 90 ° and deducts the medullary ray of belly pipe and the angle between sea line.

2. aforesaid right requires 1 said inclination air-supply arrangement, it is characterized in that: the inclination angle of said tuyere small sleeve is 9 ° to the maximum.

3. aforesaid right requires 1 said inclination air-supply arrangement, it is characterized in that: said tuyere small sleeve, the end face that it contacts belly pipe and is installed into rising pipe is vertical with the medullary ray of belly pipe.

4. aforesaid right requires 1 said inclination air-supply arrangement; It is characterized in that: said tuyere small sleeve; Wherein overlap the contoured surface of maximum diameter circle on the fitting surface; Contact belly pipe with above-mentioned tuyere small sleeve and be installed between the end face of rising pipe and be the angle relation, its angle equals the medullary ray of belly pipe and the angle between sea line.