CN201534847U

CN201534847U - Coal powder injection system for blast furnace

Info

Publication number: CN201534847U
Application number: CN200920256711XU
Authority: CN
Inventors: 李丽梅; 张桂华; 王佩林; 张如春; 杨呆
Original assignee: Jiangsu MounTop Group Co Ltd
Current assignee: Great Huan Group Co., Ltd
Priority date: 2009-11-06
Filing date: 2009-11-06
Publication date: 2010-07-28
Anticipated expiration: 2019-11-06

Abstract

The utility model discloses a coal powder injection system for blast furnace, which comprises a dispenser connected with pipelines for coal powder intake, the outlet of the dispenser is connected with coal injection branches through a blowing branch valve. A damp pipe is provided in the pipe of the injection branches, the number of the damp pipe is matched with the number of the injection branches, and the injection branches are connected with ventilation port of the blast furnace. In order to reduce the difference between the amount of coal powder at the ventilation ports, the utility model performs resistance computation by the pressure loss computation formula. And by mounting damp pipe at each of the branches of the blast furnace, the resistance difference caused by uneven length of the pipelines, the relative speed of the coal powder is controlled, and uniformity of the amount of the coal powder at each ventilation port is better guaranteed.

Description

A kind of blast-furnace coal powder sprays into system

Technical field

The utility model relates to a kind of gas powder mixing and sprays into system, is that a kind of blast-furnace coal powder sprays into system specifically; Be applicable to the evenly distribution of winding-up of coal dust in Steel Plant's bf coal injection system.

Background technology

At present, the coal dust that the blast furnace of domestic Steel Plant uses all sprays into formula, and this mode can reduce coke ratio, thereby reduces cost, and reduces and pollutes.But because the air port is distributed in positions different on the blast furnace circumferential direction, the coal jetting branch of arranging on the divider differs to the duct length in each air port, so coal dust mobile time in pipeline is not waited, the drag losses difference that is caused, thus cause the coal dust in each air port to distribute uneven; Coal dust distributes the uneven burning that has influenced blast furnace, and then quality product is impacted.In order to overcome this defective, as shown in Figure 1, the general coal dust that adopts the length that increases coal jetting branch 13 to make and enter in the blast furnace 12 distributes uniform method more, promptly the longest apart from the coal jetting branch 13 that connects on the nearest air port of divider 11, the shortest apart from the coal jetting branch 13 that connects on divider 11 air port farthest, can make the resistance in the coal jetting branch in each air port close like this, thereby make coal powder injection even; But because the length of coal jetting branch increases greatly, this has caused increase, the waste of equipment cost.

Summary of the invention

Goal of the invention: the purpose of this utility model is to overcome the shortcoming of prior art, provides a kind of blast-furnace coal powder simple in structure to spray into system, and it can make coal dust be blown in the blast furnace uniformly.

Technical scheme: it is as follows that the utility model solves the technical scheme that its technical problem adopts:

A kind of blast-furnace coal powder sprays into system, and it comprises and advance the divider that pulverized coal channel links to each other that the outlet of divider links to each other with coal jetting branch by a winding-up valve; Be provided with damper tube in the pipeline of winding-up arm, the quantity of damper tube is adaptive with the quantity of winding-up arm; The winding-up arm links to each other with each air port of blast furnace.

Wherein, the diameter of described each damper tube is less than the diameter of coal jetting branch, and diameter difference, the length of each damper tube are identical, and guarantees that the coal dust flow velocity is not less than its settling velocity in the arm; The diameter of each perhaps described damper tube is less than the diameter of coal jetting branch, and the diameter of each damper tube is identical, length is different, and guarantees that the coal dust flow velocity is not less than its settling velocity in the arm.

The utility model adopts the mode of compensation of pipeline by calculating the resistance of the coal jetting branch link to each other with each air port, and damper tube is installed, and controls the relative velocity of coal dust, realizes that each air port pulverized coal flow evenly jets.

Beneficial effect: the utility model is for the difference of the pulverized coal flow that reduces each air port, carry out drag calculation by the Calculation of pressure loss formula, damper tube is installed at each arm place at blast furnace, reduced the uneven resistance difference that forms of duct length, control the relative velocity of coal dust, better guaranteed the even, simple in structure, compact of each air port pulverized coal flow, reduce the length of coal jetting branch, reduced cost.

Description of drawings

Fig. 1 sprays into the structural representation of system for existing blast-furnace coal powder.

Fig. 2 sprays into the structural representation of system for blast-furnace coal powder of the present utility model.

Embodiment:

With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in further detail.But the utility model is not limited to given example.

As shown in Figure 2, a kind of blast-furnace coal powder of the present utility model system of spraying into comprises and advances the divider 1 that pulverized coal channel links to each other that the outlet of divider 1 links to each other with coal jetting branch 3 by a winding-up valve 2.Welding or flange are connected with damper tube 4 in the pipeline of winding-up arm 3, and the quantity of damper tube 4 is adaptive with the quantity of winding-up arm 3.The diameter of described each damper tube 4 is less than the diameter of coal jetting branch 3, and diameter difference, the length of each damper tube 4 are identical; Perhaps the diameter of each damper tube 4 is less than the diameter of coal jetting branch 3, and the diameter of each damper tube 4 is identical, length is different.Winding-up arm 3 links to each other with each air port 6 of blast furnace 5.

With a 3200m ³Coal jetting branch of blast furnace be example, as can see from Figure 1 coal jetting branch adopt equal length, etc. the mounting means that decreases of resistance, the pipeline rout complexity is installed inconveniently, the tubing consumption is big; Among Fig. 2 for having adopted the blast-furnace coal powder behind the damper tube of the present utility model to spray into system, compact construction, easy for installation.

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. a blast-furnace coal powder sprays into system, it is characterized in that: it comprises and advances the divider (1) that pulverized coal channel links to each other that the outlet of divider (1) links to each other with coal jetting branch (3) by a winding-up valve (2); Be provided with damper tube (4) in the pipeline of winding-up arm (3), the quantity of damper tube (4) is adaptive with the quantity of winding-up arm (3); Winding-up arm (3) links to each other with each air port (6) of blast furnace (5).