Pulverized coal distribution device of iron-making blast furnace

Abstract

The utility model discloses an ironmaking blast furnace pulverized coal distribution device which comprises a distributor body and a distribution chamber arranged in the distributor body, a plurality of distribution pipes communicated with the distribution chamber are arranged outside the distributor body, an annular clamping groove is formed in the lower end of the side portion of the distribution chamber, and a plurality of buffering transition blocks corresponding to the distribution pipes one to one are clamped in the annular clamping groove. The inner side of the distribution chamber of the distributor is provided with a plurality of detachable buffer transition blocks, the buffer transition blocks are provided with transition holes right opposite to the distribution openings, and through the transition effect of the transition holes of which the sizes are relatively and gradually increased, the distribution openings of the end portions of the distribution pipes are distributed in the distribution chamber. Therefore, the passing ability of the pulverized coal is improved, the service life of the distribution opening is prolonged, and the stable operation of the pulverized coal distributor is powerfully ensured.

Description

Technical Field

[0001] The utility model relates to the field of coal powder distributors, in particular to a coal powder distribution device for an iron-making blast furnace. Background Art

[0002] The pulverized coal distributor transports the pulverized coal from the bottom to the distribution chamber of the distributor body through an airflow at a certain pressure, and evenly transports the pulverized coal to the blast furnace for use through multiple distribution pipes connected to the distribution chamber.

[0003] The coal powder is transported by air flow at a certain pressure, and the coal powder enters the distribution chamber of the distributor. Figure 3 As shown in the figure, the distribution port 41 is a throat port and has a large resistance to passing through. Therefore, the coal powder causes great wear on the distribution port 41. Severe wear easily leads to leakage. Therefore, the distribution port 41 needs to be repaired by welding and grinding, which is not only time-consuming but also laborious, and affects the normal use of the distributor. Utility Model Content

[0004] In order to solve the above-mentioned problems, the utility model provides a pulverized coal distribution device for an iron-making blast furnace.

[0005] The utility model is realized through the following technical solutions:

[0006] A pulverized coal distribution device for an iron-making blast furnace comprises a distributor body and a distribution chamber arranged inside the distributor body, a plurality of distribution pipes connected to the distribution chamber are arranged outside the distributor body, an annular groove is provided at the lower end of the side of the distribution chamber, a plurality of buffer transition blocks corresponding to the distribution pipes are connected in the annular groove, and a buffer transition hole is provided inside the buffer transition block and directly faces the distribution port at the end of the distribution pipe.

[0007] Further optionally, the top cover of the distributor body is connected to a top cover, and a guide block extending into the interior of the distribution chamber is provided at the lower part of the top cover.

[0008] Further optionally, a cone angle matching the shape of the bottom of the distribution chamber is provided at the lower portion of the guide block.

[0009] Further optionally, the lower edge of the guide block is provided with a slope for pressing and limiting the top of the buffer transition block.

[0010] Further optionally, the top of the buffer transition block is provided with an oblique angle.

[0011] Further optionally, the top cover is fixedly connected to the top of the dispenser body by a plurality of fixing screws.

[0012] Compared with the existing technology, the beneficial effects of the utility model are as follows: the utility model arranges a plurality of detachable buffer transition blocks inside the distribution chamber of the distributor, and opens transition holes directly opposite to the distribution port in the buffer transition blocks, and reduces the resistance of the distribution port to the coal powder through the transition effect of the transition holes with gradually increasing sizes, thereby improving the passability of the coal powder, extending the service life of the distribution port, and effectively ensuring the stable operation of the coal powder distributor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the practical top cover;

[0015] Figure 3 It is a schematic diagram of the prior art of this utility;

[0016] In the figure: distributor body 1, distribution chamber 2, feed port 3, distribution pipe 4, distribution port 41, annular groove 5, buffer transition block 6, transition hole 7, ramp 8, top cover 9, guide block 91, ramp 10, fixing screw 11. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] like Figure 1 As shown, a pulverized coal distribution device for an iron-making blast furnace comprises a distributor body 1 and a distribution chamber 2 arranged therein, a plurality of distribution pipes 4 connected to the distribution chamber 2 are arranged outside the distributor body 1, an annular groove 5 is provided at the lower end of the side of the distribution chamber 2, a plurality of buffer transition blocks 6 corresponding to the distribution pipes 4 are connected therein, a buffer transition hole 7 is provided inside the buffer transition block 6 and is directly opposite to the distribution port 41 at the end of the distribution pipe 4, the buffer transition hole 7 is gradually expanded to transition to the inner side of the distribution chamber 2, so as to reduce the resistance of the pulverized coal passing through and avoid the wear of the distribution port 41.

[0019] like Figure 2 As shown, the top cover of the dispenser body 1 is connected with a top cover 9, and the lower part of the top cover 9 is provided with a guide block 9 extending into the inside of the dispensing chamber 2, and the guide block 9 can form a through cavity with the bottom of the dispensing chamber 2.

[0020] like Figure 2 As shown, a cone angle matching the shape of the bottom of the distribution chamber 2 is provided at the lower part of the guide block 9, and the cone angle has a good guiding effect to ensure the passability of the coal powder.

[0021] The lower edge of the guide block 9 is provided with a slope for pressing and limiting the top of the buffer transition block 6. The buffer transition block 6 is pressed by the slope to achieve a limiting effect on the buffer transition block 6 to prevent it from loosening.

[0022] The top of the buffer transition block 6 is provided with an oblique angle, which can cooperate with the slope of the buffer transition block 6 to ensure its tightness.

[0023] The top cover 9 is fixedly connected to the top of the dispenser body 1 by a plurality of fixing screws 11 .

[0024] The implementation principle of the pulverized coal distribution device for an ironmaking blast furnace in the embodiment of the present application is as follows:

[0025] The coal powder conveyed by the airflow with a certain pressure enters the distribution chamber 2 through the feed port 3 at the bottom of the distributor. The coal powder moves to the distribution port 41 of the distribution pipe 4 at the side of the distribution chamber 2 through the guiding effect of the guide block 91 with a cone angle at the bottom of the top cover 9.

[0026] Before entering the distribution port 41, it will first pass through the transition hole 7 of the buffer transition block 6. The transition effect of the transition hole 7 with a relatively gradually increasing size can reduce the resistance of the distribution port 41 to the coal powder, thereby improving the passability of the coal powder and extending the service life of the distribution port 41. When the transition hole 7 is severely worn, the fixing screws 11 can be loosened to open the top cover 9, and the severely worn buffer transition block 6 in the distribution chamber 2 can be taken out from the annular groove 5 for replacement. After replacement, the top cover 9 is reinstalled. In this way, the disassembly and assembly of the buffer transition block 6 is more convenient and efficient, which effectively guarantees the stable operation of the coal powder distributor.

[0027] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A pulverized coal distribution device for an ironmaking blast furnace, comprising a distributor body (1) and a distribution chamber (2) arranged therein, a plurality of distribution pipes (4) communicating with the distribution chamber (2) being arranged outside the distributor body (1), characterized in that: The lower end of the side of the distribution chamber (2) is provided with an annular groove (5), a plurality of buffer transition blocks (6) corresponding one to one with the distribution pipes (4) are clamped in the annular groove (5), and a buffer transition hole (7) is provided inside the buffer transition block (6) and is directly opposite to the distribution port (41) at the end of the distribution pipe (4).

2. The pulverized coal distribution device for an ironmaking blast furnace according to claim 1, characterized in that: The top cover of the distributor body (1) is connected to a top cover (9), and the lower part of the top cover (9) is provided with a guide block (91) extending into the interior of the distribution chamber (2).

3. The pulverized coal distribution device for an ironmaking blast furnace according to claim 2, characterized in that: The lower part of the guide block (91) is provided with a cone angle matching the shape of the bottom of the distribution chamber (2).

4. The pulverized coal distribution device for an ironmaking blast furnace according to claim 3, characterized in that: The lower edge of the guide block (91) is provided with a slope for pressing and limiting the top of the buffer transition block (6).

5. The pulverized coal distribution device for an ironmaking blast furnace according to claim 4, characterized in that: The top of the buffer transition block (6) is provided with an oblique angle.

6. The pulverized coal distribution device for an ironmaking blast furnace according to claim 2, characterized in that: The top cover (9) is fixedly connected to the top of the dispenser body (1) via a plurality of fixing screws (11).

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