CN201273421Y

CN201273421Y - Coal powder injection triplet

Info

Publication number: CN201273421Y
Application number: CNU2008200408025U
Authority: CN
Inventors: 韩宏松; 蔡善咏; 彭福荣
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2008-07-29
Filing date: 2008-07-29
Publication date: 2009-07-15
Anticipated expiration: 2018-07-29

Abstract

The utility model relates to a coal injection three-way element, which belongs to the technical field of delivery pipelines. The coal injection three-way element comprises a main pipe, two branch pipes and a distribution element, wherein the distribution element is provided with a symmetrical bifurcated channel with two smooth arc sides. The branch portion of the symmetrical bifurcated channel is provided with a conical deflector with two transitional arc sides corresponding to the smooth arc sides. One end of the symmetrical bifurcated channel away from the branch end is fixedly butt-jointed with the main pipe, and both ends at the branch end are respectively fixedly butt-jointed with the two branch pipes. Because of reasonable design, the utility model not only can select anti-abrasive material to produce three-way elements according to requirements but also can smoothly and uniformly distribute coal powder without blocking because of smooth transition between the main pipe and the branch pipes, thereby practically satisfying the requirements of double lance coal injection.

Description

The coal powder injection threeway

Technical field

Model utility relates to a kind of three-way device of carrying gas, fixed double phase flow, and especially a kind of coal powder injection threeway belongs to the delivery line technical field.

Background technique

The form of a coal jetting branch to an air port adopted in the blast-furnace tuyere coal powder injection usually, so the quantity of coal jetting branch is identical with the blast-furnace tuyere number.For improving coal combustion rate, realize saving energy and reduce the cost, a kind of new coal powder injection technology---air port rush-harvesting and rush-planting coal powder injection obtains promoting, and promptly increases a coal rifle in the air port.

Because the coal rifle that increases newly also needs a coal jetting branch to supply with coal dust, and the limited amount of coal jetting branch is in distributor, therefore the way of a simple possible is to connect a threeway on original arm, thereby reach " being divided into two ", connect the purpose of two coal rifles simultaneously, do not need to change distributor like this, need not the transformation and upgrade automatic system yet, just can satisfy the needs of rush-harvesting and rush-planting coal powder injection, both economical, convenient again.

The existing threeway that is used for water, gas, the conveying of wet goods monophasic fluid is generally the one piece casting that is shaped on interface thread, it is directly used in the coal dust conveying has following problem:

1. existing threeway is T shape or Y shape, and the pulverized coal flow process can produce eddy current when dividing prong, and not only drag losses is big, and owing to have some setbacks easy blocking pipe;

2. can't guarantee the pulverized coal flow uniform distribution of two-way output, be difficult to realize accurate " being divided into two ";

3. the inwall intensity of threeway is difficult to stand the erosive wear of pulverized coal flow.

The model utility content

The purpose of model utility is: at the needs of rush-harvesting and rush-planting coal powder injection, propose a kind of can be smooth and easy with coal dust uniform distribution and anti abrasive coal powder injection threeway, this coal powder injection threeway should be convenient to make.

In order to reach above purpose, coal powder injection threeway of the present utility model comprises to be responsible for and two arms, also comprises the branch part; It is the SYMMETRIC BIFURCATION passage of slick and sly camber line that described distribution system has dual-side; The crotch of described SYMMETRIC BIFURCATION passage is a conical baffle; The dual-side of described conical baffle is and the described minute corresponding transition arc of the slick and sly camber line of part dual-side; Described SYMMETRIC BIFURCATION runner is connected with being responsible for to dock away from the port of divergent ends, and the two-port of divergent ends is docked with two arms respectively and is connected.

Of the present utility model further improving is, described SYMMETRIC BIFURCATION runner equates with person in charge's internal diameter away from the bore of divergent ends, two bores of divergent ends equate with two bores that respectively the interior shape of described SYMMETRIC BIFURCATION runner is served as reasons and arrived two circular cross-sections of divergent ends away from two semi-circular cross-section rounding ofves of divergent ends.

It is that part was made of the two halves that are combined to form the bifurcated runner in described minute that the utility model further improves.

Because reasonable in design, therefore not only can select for use high-abrasive material to make threeway as required, and owing to be responsible for passage rounding off to arm, therefore can be smooth and easy with the coal dust uniform distribution, can not stop up, thereby can satisfy the needs of rush-harvesting and rush-planting coal powder injection conscientiously.

Description of drawings

Below in conjunction with accompanying drawing model utility is further described.

Fig. 1 is the utility model one embodiment's a cross-sectional view.

Fig. 2 is a plan view of the present utility model.

Fig. 3 is a side view of the present utility model.

In the accompanying drawing: 1. be responsible for the external connection screw head; 2. conical baffle; 3. branch part; 4. arm external connection screw head; 5. screw; 6. be responsible for; 7. arm.

Embodiment

Embodiment one

The coal powder injection threeway of present embodiment divides part 3 to adopt split type (Hough) cast steel structure as shown in Figure 1, 2, 3, and being connected with screw 5 by involutory two halves constitutes.Part was shaped on the half of bifurcated passage that dual-side is slick and sly camber line respectively in two minutes, the divergent ends of two fens parts respectively with involutory conical baffle 2 cast inblocks, behind carburizing and quenching, can obtain desirable hardness, thereby have enough wear resistancies.The dual-side of conical baffle 2 is and the corresponding transition arc of the slick and sly camber line of minute part dual-side, the SYMMETRIC BIFURCATION runner equates with the internal diameter of being responsible for 6 away from the bore of divergent ends, connect with the person in charge's 6 butt welding, two bores of divergent ends equate with two arms, 7 internal diameters respectively, insert two arms respectively by counterbore after butt welding connect.The angle α of arm 7 center lines and SYMMETRIC BIFURCATION runner symmetrical center line is the 15-45 degree, best 30 degree.The interior shape of SYMMETRIC BIFURCATION runner is served as reasons and is arrived two circular cross-sections of divergent ends away from two semi-circular cross-section rounding ofves of divergent ends.

During manufacturing, behind branch part 3 castings, lumen wall is done case-carbonizing handle, its surface hardness reaches Vickers hardness more than 900, and then two splits are welded, and reinforces by hexagon socket cap head screw 5.Being responsible for external connection screw head 1 and arm external connection screw head 4 is welded on respectively on the corresponding interface of branch part 3.During use, get final product with the external coal dust delivery line of arm external connection screw head 4 difference by being responsible for external connection screw head 1.

Because the structural design of present embodiment has been considered hydromechanical characteristics, the flow characteristic that the inside bifurcated runner of its rounding off and internal surface Carburization Treatment have adapted to pulverized coal flow.Facts have proved that its usability is good, can satisfy the blast furnace PCI technology requirement, have that resistance is little, distributed uniform, do not stop up, remarkable advantage such as wear resistance height, it is simple also to possess processing technology simultaneously, lower-cost characteristics.

In a word, its beneficial effect can be summarized as:

1. this threeway is owing to having taper circular arc side deflector and circular arc master, arm distributary division The position connects, and the resistance of ducting is little, distributed uniform, and pipeline is difficult for stopping up;

2. inner wall surface is through Carburization Treatment, and hardness can be born the long-term impact grinding of pulverized coal flow Decrease;

3. processing technology is simple, and cost is low.

Claims

1. coal powder injection threeway comprises and being responsible for and two arms, it is characterized in that: also comprise the branch part; It is the SYMMETRIC BIFURCATION passage of slick and sly camber line that described distribution system has dual-side; The crotch of described SYMMETRIC BIFURCATION passage is a conical baffle; The dual-side of described conical baffle is and the described minute corresponding transition arc of the slick and sly camber line of part dual-side; Described SYMMETRIC BIFURCATION runner is connected with being responsible for to dock away from the port of divergent ends, and the two-port of divergent ends is docked with two arms respectively and is connected.

2. according to the described coal powder injection threeway of claim 1, it is characterized in that: described SYMMETRIC BIFURCATION runner equates with person in charge's internal diameter away from the bore of divergent ends, two bores of divergent ends equate with two bores that respectively the interior shape of described SYMMETRIC BIFURCATION runner is served as reasons and arrived two circular cross-sections of divergent ends away from two semi-circular cross-section rounding ofves of divergent ends.

3. according to the described coal powder injection threeway of claim 2, it is characterized in that: part was made of the two halves that are combined to form the bifurcated runner in described minute.

4. according to the described coal powder injection threeway of claim 3, it is characterized in that: the divergent ends of described two minutes parts respectively with involutory conical baffle cast inblock.

5. according to the described coal powder injection threeway of claim 4, it is characterized in that: the angle of described arm center line and SYMMETRIC BIFURCATION runner symmetrical center line is the 15-45 degree.

6. according to the described coal powder injection threeway of claim 5, it is characterized in that: butt welding connected after the two-port of described divergent ends was inserted two arms by counterbore respectively.