CN201000078Y - Gas-solid fluid equal distribution device - Google Patents

Abstract

The utility model relates to a gas-solid-fluid equipartition device. The utility model comprises a tube body, connecting branch pipes are arranged on the tube body, a core body is installed in the tube body, the core body is positioned and installed in the tube body through a positioning block, an upper cover plate and a lower cover plate are respectively arranged at the upper and lower parts of the tube body, and the upper cover plate and the lower cover plate are respectively fastened on the tube body through bolts. The installation of the utility model on the main coal injection pipe enables gas, solid and fluid to be evenly distributed into two branch pipes when the powdered coal and the compressed air conveyed from the main pipe pass the triangular equipartition device core body of the utility model, to realize the purpose that the gas, solid and fluid can be evenly distributed, and the utility model performs the function of even equipartition of the coal injection quantity in the high furnace coal injection, enables the coal quantity injected into each blast hole to be even to the maximum degree, and guarantees the thermal balance in the furnace; at the same time, the gas, solid and fluid evenly enter the coal injection distributor, avoiding the blocking of the coal injection distributor; the utility model can be exchanged rapidly through a disassembling quick change coupler, and the replacement of the valve body is convenient.

Description

Gas-solid fluid equal distribution device

【Technical field】

The utility model relates to a gas-solid-fluid equalizing device for blast furnace coal injection equipment for equally dividing solid coal powder and gaseous compressed air.

【Background technique】

With the development of blast furnace smelting technology, increasing the coal ratio and reducing the coke ratio play a key role in reducing energy consumption in the ironmaking process. Means, can increase the coal ratio, reduce the coke ratio and process energy consumption. In order to optimize the injection process, a coal injection main pipe is used to branch into two branch pipes (can be used in series) or several branch pipes to deliver gas-solid fluid (coal powder + Compressed air), and then distributed by the coal injection distributor into several branch pipes to inject gas-solid fluid (coal powder + compressed air) to each tuyere, which can reduce resistance loss and tank pressure, and meet the needs of long distances.

At present, the commonly used equalization methods mainly include natural equalization and cylindrical equalization. The natural equal distribution means that the gas-solid fluid (coal powder + compressed air) equal distribution device is not provided for the coal injection main pipe, and the two coal injection distributors are directly connected to the coal transportation main pipe. Since the gas-solid fluid (coal powder + compressed air ) is easy to do linear motion, the two pulverized coal branch pipes are not fully divided, and the gas-solid fluid (coal powder + compressed air) enters the coal injection distributor unevenly, which may easily cause part of the coal injection distributor to be blocked, resulting in the distributor All coal guns stop coal, and it takes a long time to deal with the blockage, which is difficult, and a certain amount of coal powder is discharged, resulting in energy waste and environmental pollution; the cylindrical equal distribution is to install a cylindrical equal distribution device on the coal injection main pipe, Connect the two coal-injection distributors to the branch pipe of the cylinder-type equalizer. Since the gas-solid fluid (coal powder + compressed air) generates eddy currents in the cylinder-type equalizer, it is completely regulated by the pressure of the pipeline itself. If the continuous and uniform coal injection process requirements are not met, the two pulverized coal branch pipes are not fully divided, and the gas-solid fluid (coal powder + compressed air) enters the coal injection distributor unevenly, which will easily cause some coal injection distributors to block, thereby All the coal guns of the distributor stop coaling, it takes a long time to deal with the blockage, it is difficult, and a certain amount of pulverized coal is discharged, resulting in energy waste and environmental pollution.

【Content of utility model】

In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a function of evenly distributing the amount of coal injection in the blast furnace coal injection, which can make the amount of coal injected into each tuyere equal to the maximum and ensure the heat balance gas in the furnace. Solid-fluid equalizer.

The technical scheme adopted by the utility model to solve the technical problem is: a gas-solid fluid equalizing device, including a cylinder body, the cylinder body is provided with a connecting branch pipe, and a core body is installed in the cylinder body. Positioning and installation in the cylinder, the upper and lower parts of the cylinder are respectively provided with an upper cover and a lower cover, and the upper cover and the lower cover are respectively fastened to the cylinder by bolts.

Gaskets are installed between the cylinder body and the upper cover plate and the lower cover plate respectively.

The core is a triangular core.

The bolts include nuts, and spring washers and sealing washers are arranged between the nuts and the upper and lower cover plates.

The branch pipe is equipped with threads for installing quick couplings.

The beneficial effects of the utility model are: the utility model is installed on the coal injection main pipe, so that when the gas-solid fluid of coal powder and compressed air conveyed from the main pipe passes through the triangular equalizer core of the utility model, the gas-solid fluid The core body is evenly distributed to the two branch pipes to achieve the purpose of uniform distribution of gas-solid fluid. It plays the role of evenly distributing the amount of coal injection in the blast furnace coal injection, and can maximize the amount of coal injected into each tuyere. The heat balance in the furnace is improved; at the same time, the gas-solid fluid enters the coal injection distributor evenly, avoiding the blockage of the coal injection distributor. The utility model can reduce or enlarge the size, size and angle of the coal delivery pipe according to different environments and installation terrains according to the actual situation. When replacement is required, the quick-change joint is directly disassembled for quick replacement; when the core body of the utility model is worn out, the core body can be replaced by removing the cover.

【Description of drawings】

Fig. 1 is the front sectional view of the utility model;

Fig. 2 is a top sectional view of the utility model;

Fig. 3 is a flow chart of the coal injection process of an embodiment of the present invention.

In the figure: 1-lower cover, 2-gasket, 3-branch, 4-cylinder, 5-upper cover, 6-bolt, 7-nut, 8-spring washer, 9-gasket, 10-core Body, 11-positioning block.

【Detailed ways】

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

Referring to Fig. 1 and Fig. 2, a gas-solid fluid equalizing device includes a cylinder 4, which is made of ordinary carbon steel seamless pipe. The cylinder is provided with a connecting branch pipe 3, and the material of the branch pipe 3 is made of wear-resistant casting Manufactured by steel pipe processing, the branch pipe 3 is equipped with screw teeth for installing quick-change joints; a core body 10 is installed in the cylinder body 4, and the core body 10 is made of wear-resistant cast steel or wear-resistant rubber or ceramics to form a triangular shape; The core 10 is positioned and installed in the cylinder 4 through the positioning block 11. The upper and lower parts of the cylinder 4 are respectively provided with an upper cover 1 and a lower cover 5, and the upper cover 1, the lower cover 5 and the cylinder 4 Sealing gaskets 9 are installed respectively, and the upper cover plate 1 and the lower cover plate 5 are fastened on the cylinder body 4 by bolts 6. The bolts 6 include nuts 7, and spring washers 8 are installed between the nuts 7 and the upper and lower cover plates. and gasket 9.

As shown in Figure 3, the utility model is applied to the technological process of blast furnace coal injection. The cylinder body 4 of the utility model is made of Q235 seamless steel pipe with a diameter of φ200×4×100, and the upper cover plate 5 and the lower cover plate 1 are made of δ =15mm Q235 steel plate blanking production, the branch pipe 3 is made of stainless steel pipe of φ76×5.5×200 and welded with the cylinder body 4 as required to form a whole, and the core body 10 is made of wear-resistant steel. The gas-solid fluid equalizing device used by the applicant's No. 3 blast furnace was installed and used in April 2003. After more than two years of use, the effect is particularly obvious. The coal blocking phenomenon of the south coal injection distributor has been reduced from 15 times a month to zero. Coal injection has increased from 118kg/t·Fe in the past to 145-160kg/t·Fe, there is no significant difference in the contrast of coal flakes between the south and north tuyeres, the heat balance of the blast furnace is guaranteed, and the blast furnace runs smoothly; the annual physical utilization factor of No. 3 blast furnace in 2004 3.73t/m ³ .d, of which the monthly physical utilization coefficient of blast furnaces reached over 4.0t/m ³ .d in two months, which was the best level of blast furnaces of the same level in the country.

Claims (5)

1. A gas-solid fluid equalizing device, comprising a cylinder, characterized in that: the cylinder is provided with a connecting branch pipe, and a core is installed in the cylinder, and the core is positioned and installed in the cylinder through a positioning block, and the cylinder is installed in the cylinder. The upper and lower parts of the cylinder are respectively provided with an upper cover plate and a lower cover plate, and the upper cover plate and the lower cover plate are respectively fastened to the cylinder by bolts. 2. The gas-solid fluid equal distribution device according to claim 1, characterized in that: gaskets are installed between the cylinder body and the upper cover plate and the lower cover plate respectively. 3. The gas-solid fluid equidistribution device according to claim 1, characterized in that: the core is a triangular core. 4. The gas-solid fluid equalizing device according to claim 1, wherein the bolts include nuts, and spring washers and sealing washers are installed between the nuts and the upper and lower cover plates. 5. The gas-solid fluid equal distribution device according to claim 1, characterized in that: the branch pipe is equipped with a thread for installing a quick-change joint.

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