CN2503368Y

CN2503368Y - Pulverized coal distributer

Info

Publication number: CN2503368Y
Application number: CN 01264684
Authority: CN
Inventors: 吉永业; 梁津原; 何小平; 刘素青; 王晓冰
Original assignee: Taiyuan Iron and Steel Group Co Ltd
Current assignee: Shanxi Taigang Stainless Steel Co Ltd
Priority date: 2001-09-06
Filing date: 2001-09-06
Publication date: 2002-07-31
Anticipated expiration: 2011-09-06

Abstract

The utility model discloses a pulverized coal distributor which comprises a top cover, a shell, a distribution branch pipe and a main pipe and is characterized in that an internal hollow chamber of the shell is provided with a replaceable internal core, the middle plane of the internal core is uniformly distributed with a plurality of distribution holes, the internal core distribution hole, the shell distribution hole and the distribution branch pipe are one-to-one corresponding and mutually communicated, and the hole diameter takes a stepped increase. The movable internal core arranged in the utility model eliminates the eddy flow produced by the hollow chamber, the distribution evenness degree is obviously improved, the pulsation phenomenon doesn't occur in the process of coal output, and the easily-worn part can be convenient replaced, which thereby improves the service life of the whole body.

Description

Pulverized coal distributor

One, technical field

The utility model belongs to pressed powder distributor field, is specifically related to a kind of distributor that when blast furnace low speed concentrated phase is dusted coal dust is distributed that is applicable to.

Two, background technology

Blast furnace generally is that gas is carrier when coal injection, and coal dust is imported pulverized coal distributor by conveyance conduit, after the distributor uniform distribution, coal dust is transported to a plurality of air ports of blast furnace by defeated coal arm, and then sprays in the blast furnace.The low speed high-density coal injection is the developing direction of current blast furnace ironmaking coal powder injection technology, and it requires coal dust flow velocity in distributor slow, distributed uniform, accurate.

At present, blast furnace adopts the goat's horn formula distributor of capital iron and steel research institute development mostly when coal injection, and the problem and the shortcoming of its existence mainly are:

(1) this inner skeleton cavity is big, easily produces eddy current, and coal dust flows pulsation phenomenon, maldistribution;

(2) the rapid wear part is an one with shell, is difficult for changing;

(3) the coal dust flow velocity is big, and about 17m/s, pipeline is easy to wear, and service life is short;

(4) each arm is the distribution of goat's horn formula, makes complexity, and maintenance is inconvenient.

The described mushroom hair style pulverized coal distributor of Chinese patent ZL96200125.2 is a kind of distributor of the mushroom hair style cavity body structure of being made up of parts such as inspection cover, top cover and bases, this inner skeleton cavity is big, require the coal dust flow velocity big, under the situation of the high high-density coal injection of low speed, coal dust flows and easily produces eddy current, and pulsation phenomenon is arranged, maldistribution, and pipeline easily stops up, and is easy to wear, and service life is short.

Three, summary of the invention

The purpose of this utility model is intended to overcome above-mentioned shortcoming, and the pulverized coal distributor of a kind of suitable low speed high-density coal injection, easy for installation, distributed uniform, long service life is provided.

For reaching above-mentioned purpose, the utility model adopts following solution: the shell that has some dispensing orifices around comprising, the top of shell is provided with top cover, the bottom of shell is provided with the house steward who communicates with its cavity, the fixedly connected dispensing branch that communicates with dispensing orifice in the outer end of shell dispensing orifice, it is characterized in that: the internal cavities place between top cover and shell is provided with the inner core that can change, the center of inner core has a macropore from top to bottom, identical with house steward's aperture and vertical communicating, the mid-plane of inner core is the some dispensing orifices that communicate with the center macropore of distribution evenly, the inner core dispensing orifice, the corresponding one by one also level of shell dispensing orifice and dispensing branch communicates.

Above-mentioned pulverized coal distributor is characterized in that: described top cover bottom is provided with a convex body, inserts the center macropore of inner core.

Above-mentioned pulverized coal distributor is characterized in that: described convex body is by cylinder and cone, and cylinder closely is inserted in the center macropore of inner core.

Above-mentioned pulverized coal distributor is characterized in that: the aperture of described inner core dispensing orifice, shell dispensing orifice and dispensing branch is staged to be increased.

Use of the present utility model is: distributor house steward's lower end is connected with the coal powder injection house steward by the primary and secondary flange, overabsorption arm in the distributor is connected with many defeated coal arms, when the coal dust that transports by the coal powder injection house steward when the distributor house steward enters the center macropore of inner core, by the defeated at the most coal arm of some inner core dispensing orifices, shell dispensing orifice and dispensing branch uniform distribution, spray into blast furnace by spray gun through the air port again.

Compared with prior art, the utlity model has following advantage:

1, because the utility model is provided with the inner core that can change at the internal cavities place of shell, inner core dispensing orifice, shell dispensing orifice and dispensing branch correspondence and level one by one communicate, so, the utility model has realized that level produces coal, eliminated the eddy current that produces because of cavity, the distributed uniform degree obviously improves, and producing coal does not have pulsation phenomenon.

2, part easy to wear of the present utility model is conveniently replaced, thereby improves the service life of the utility model integral body.Inner core is the rapid wear part of distributor, and the utility model as separate component, is convenient to it to change.

3, the convex body of the utility model top cover bottom is made up of cylinder and cone, and the center macropore trap of cylinder and inner core seals; Cone reduces the coal dust flowing space first, eliminates the eddy current that cavity produces, and second reduces the coal dust resistance.

4, because the aperture of inner core dispensing orifice of the present utility model, shell dispensing orifice and dispensing branch is the staged increase, according to fluid mechanics principle, it is even to 1-3m/s and flow velocity that such structure can reduce the coal dust flow velocity greatly, so coal dust is very slight to the wearing and tearing of pipeline, prolonged the service life of distributor and pulverized coal channel greatly, reduce the maintenance of equipment amount, reduced entreprise cost.

Four, description of drawings

Fig. 1, structural representation of the present utility model.

The vertical view of Fig. 2, Fig. 1.

1---top cover 2---inner core 3---shell 4---dispensing branch

5---house steward 6---bolt 7---packing ring 8---alignment pins

9---shell dispensing orifice 10---inner core dispensing orifice 11---primary and secondary flanges

Five, the specific embodiment

As Fig. 1, shown in Figure 2, around comprising, the utility model has the shell 3 of some dispensing orifices 9, the top of shell 3 is provided with top cover 1 by bolt 6, top cover 1 bottom is provided with a convex body, the convex body is by cylinder and cone, cylinder closely is inserted in the center macropore of inner core, the bottom of shell 3 is provided with the house steward 5 who communicates with its cavity, the fixedly connected dispensing branch 4 that communicates with dispensing orifice 9 in the outer end of shell dispensing orifice 9, internal cavities place between top cover 1 and shell 3 is provided with the inner core 2 that can change, be provided with seal washer 7 between inner core 2 and the top cover 1, the center of inner core 2 has a macropore from top to bottom, identical with house steward 5 aperture and vertical communicating, the mid-plane of inner core 2 is the some dispensing orifices 10 that communicate with the center macropore of distribution evenly, inner core dispensing orifice 10, the corresponding one by one level of shell dispensing orifice 9 and dispensing branch 4 communicates, and their aperture is the staged increase.

Claims

1, a kind of pulverized coal distributor, have the shell of some dispensing orifices around comprising, the top of shell is provided with top cover, the bottom of shell is provided with the house steward who communicates with its cavity, the fixedly connected dispensing branch that communicates with dispensing orifice in the outer end of shell dispensing orifice, it is characterized in that: the internal cavities place between top cover and shell is provided with the inner core that can change, the center of inner core has a macropore from top to bottom, identical with house steward's aperture and vertical communicating, the mid-plane of inner core is the some dispensing orifices that communicate with the center macropore of distribution evenly, the inner core dispensing orifice, the corresponding one by one also level of shell dispensing orifice and dispensing branch communicates.

2, pulverized coal distributor according to claim 1 is characterized in that: described top cover bottom is provided with a convex body, inserts the center macropore of inner core.

3, pulverized coal distributor according to claim 2 is characterized in that: described convex body is by cylinder and cone, and cylinder closely is inserted in the center macropore of inner core.

4, pulverized coal distributor according to claim 1 is characterized in that: the aperture of described inner core dispensing orifice, shell dispensing orifice and dispensing branch is staged to be increased.