Blast furnace coal injection equipment

Abstract

The utility model discloses blast furnace coal injection equipment which comprises at least two coal injection tanks, and feeding mechanisms are arranged on the coal injection tanks. Supercharging equipment is arranged on the coal injection tanks, the supercharging equipment is respectively communicated with the coal injection tanks through pipelines, first valves are arranged on the pipelines connected with the coal injection tanks, and pressure sensors are arranged in the coal injection tanks; a coal discharging mechanism is arranged on the lower sides of the coal injection tanks and comprises discharging pipes arranged at the lower ends of the two coal injection tanks respectively, and the lower ends of the two discharging pipes are connected with the same coal injection pipe. According to the blast furnace coal injection equipment, under the cooperation of all the components, through alternate use of the at least two coal injection tanks, coal powder can be conveniently added into the coal injection tanks.

Description

Technical Field

[0001] The utility model relates to the technical field of coal injection, in particular to a blast furnace coal injection device. Background Art

[0002] As an important link in modern steel production, the development and application of intelligent coal injection technology for blast furnaces is of great significance for improving production efficiency, reducing costs and achieving green and low-carbon development. However, when using intelligent coal injection equipment, since the pressure in the coal injection tank needs to be kept constant, it is not convenient to add coal powder to the coal injection tank when the coal powder in the coal injection tank gradually decreases. In order to add coal powder to the coal injection tank, this application proposes a blast furnace coal injection equipment that can alternately inject coal. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a blast furnace coal injection device, which facilitates adding pulverized coal into the coal injection tanks by alternately using at least two coal injection tanks.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A blast furnace coal injection device includes at least two coal injection tanks, each of which is provided with a feeding mechanism;

[0005] A booster device is provided on the coal injection tank, and the booster device is connected to the coal injection tank through pipelines. A first valve is provided on each pipeline connected to the coal injection tank, and a pressure sensor is provided in the coal injection tank;

[0006] A coal discharging mechanism is provided on the lower side of the coal injection tank. The coal discharging mechanism includes discharge pipes respectively provided at the lower ends of the two coal injection tanks. The lower ends of the two discharge pipes are connected to the same coal injection pipe. A second valve is provided on each discharge pipe.

[0007] The feeding mechanism includes a first feeding pipe connected to the coal injection pot, a first filter screen is obliquely provided in the first feeding pipe, a second feeding pipe is connected to the side of the first feeding pipe through a first guide pipe, and the lower side of the first guide pipe is flush with the lower end of the first filter screen, a second filter screen is obliquely provided in the second feeding pipe and is lower than the first guide pipe, a discharge pipe is connected to the side of the second feeding pipe, the lower side of which is flush with the second filter screen, a gate valve is provided on the discharge pipe, and the lower ends of the first feeding pipe and the second feeding pipe are both connected to the coal injection pot.

[0008] Preferably, the upper end of the second feeding pipe is closed.

[0009] Preferably, the first feeding pipe and the second feeding pipe are both bent.

[0010] Preferably, the pipeline includes a tee pipe connected to the boosting equipment, both ends of the tee pipe are connected to the coal injection tank through a guide pipe, and the first valve is provided on the guide pipe.

[0011] The utility model provides a blast furnace coal injection equipment, which has the following beneficial effects:

[0012] 1. The blast furnace coal injection equipment can filter out larger particles that have not been filtered out of the coal powder through the setting of the feeding mechanism, and intercept them on the first filter screen. With the cooperation of the first guide pipe and the second feed pipe, the intercepted materials and the coal powder accumulated on the first filter screen can slide onto the second filter screen on the second feed pipe, which is convenient for separating the coal powder and larger materials. The larger materials slide from the second filter screen into the discharge pipe. The air pressure value in the coal injection tank can be detected through the setting of the pressure sensor.

[0013] 2. The blast furnace coal injection equipment is equipped with a coal discharge mechanism, which allows two coal injection tanks to be used alternately. When one of the coal injection tanks needs to be added with coal powder, the other coal injection tank is used to inject coal. Uninterrupted coal injection can be achieved during use, which reduces the pipe blockage rate and reduces the gas consumption in the coal injection production process. It avoids frequent fluctuations in the coal injection nitrogen and compressed air pipelines, and reduces the operating cost of coal injection; improves the combustion rate of coal powder and the replacement ratio; and reduces the consumption of nitrogen and cold compressed air for blast furnace energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model.

[0016] In the figure: 1. Coal injection tank; 2. Booster equipment; 3. First valve; 4. Pressure sensor; 5. First feed pipe; 6. First filter; 7. First guide pipe; 8. Second feed pipe; 9. Second filter; 10. Discharge pipe; 11. Gate valve; 12. Discharge pipe; 13. Coal injection pipe; 14. Second valve; 15. Tee pipe; 16. Diversion pipe. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to specific embodiments. Figures 1 to 2 As shown:

[0018] Example 1: A blast furnace coal injection equipment includes at least two coal injection tanks 1. A feeding mechanism is provided on the coal injection tank 1 to facilitate the feeding of pulverized coal into the coal injection tank 1. A third valve is provided on the feeding mechanism. After the feeding is completed, the third valve is closed to seal the coal injection tank 1 from the connection between the feeding mechanism and the outside, thereby facilitating subsequent work.

[0019] A booster device 2 is provided on the coal injection tank 1. The booster device 2 is connected to the coal injection tank 1 through a pipeline. A first valve 3 is provided on each pipeline connected to the coal injection tank 1. The setting of the first valve 3 can control which coal injection tank 1 the booster device 2 increases pressure in. The coal injection tank 1 is provided with a pressure sensor 4. The pressure sensor 4 can detect the pressure value in the coal injection tank 1 so as to maintain a constant pressure during the coal injection process.

[0020] A coal discharging mechanism is provided at the lower side of the coal injection tank 1. The coal discharging mechanism includes discharge pipes 12 respectively provided at the lower ends of the two coal injection tanks 1. The lower ends of the two discharge pipes 12 are connected to the same coal injection pipe 13. A second valve 14 is provided on the discharge pipe 12. The second valve 14 controls whether the coal injection tank 1 discharges coal. When the pressure value in one of the coal injection tanks 1 is higher than the set value, coal injection is carried out, and the corresponding second valve 14 is opened to carry out the coal injection work.

[0021] Example 2: A blast furnace coal injection device comprises at least two coal injection tanks 1, each provided with a feeding mechanism for conveniently feeding pulverized coal into the coal injection tank 1, and a third valve provided on the feeding mechanism. After the feeding is completed, the third valve is closed to seal the coal injection tank from the connection between the feeding mechanism and the outside, thereby facilitating subsequent work.

[0022] The feeding mechanism includes a first feeding pipe 5 connected to the coal injection tank 1, a third valve is provided on the first feeding pipe 5, and a first filter screen 6 is obliquely provided in the first feeding pipe 5. The first filter screen 6 can quickly filter the pulverized coal again, thereby filtering out relatively large particles mixed in the pulverized coal as much as possible. A second feeding pipe 8 is connected to the side of the first feeding pipe 5 through a first guide pipe 7. The upper end of the second feeding pipe 8 is closed, and the lower side of the first guide pipe 7 is flush with the lower end of the first filter screen 6. Through the provision of the first filter screen 6, the relatively large filtered materials and the materials accumulated on the first filter screen 6 can pass through the first guide pipe 7 into the second feeding pipe 8, thereby preventing the materials from clogging the first feeding pipe 5;

[0023] A second filter screen 9 is provided in the second feed pipe 8, which is inclined and lower than the first guide pipe 7. Through the setting of the second filter screen 9, the accumulated coal powder and the filtered materials fall on the second filter screen 9 and can be filtered again, which is convenient for intercepting larger materials. The qualified coal powder enters the coal injection tank 1 through the second feed pipe 8;

[0024] The side of the second feed pipe 8 is connected to a discharge pipe 10 whose lower side is flush with the second filter screen 9. The intercepted larger materials can be discharged from the second feed pipe 8 through the discharge pipe 10. A gate valve 11 is provided on the discharge pipe 10. Through the setting of the gate valve 11, the larger coal materials can be discharged and crushed again after the work is completed. The lower ends of the first feed pipe 5 and the second feed pipe 8 are both connected to the coal injection tank 1;

[0025] A booster device 2 is provided on the coal injection tank 1. The booster device 2 is connected to the coal injection tank 1 through a pipeline. A first valve 3 is provided on each pipeline connected to the coal injection tank 1. The setting of the first valve 3 can control which coal injection tank 1 the booster device 2 increases pressure in. The coal injection tank 1 is provided with a pressure sensor 4. The pressure sensor 4 can detect the pressure value in the coal injection tank 1 so as to maintain a constant pressure during the coal injection process.

[0026] A coal discharging mechanism is provided on the lower side of the coal injection tank 1. The coal discharging mechanism includes a discharge pipe 12 provided at the lower end of each of the two coal injection tanks 1. The lower ends of the two discharge pipes 12 are connected to the same coal injection pipe 13. A second valve 14 is provided on each of the discharge pipes 12. The second valve 14 controls whether the coal injection tank 1 discharges coal. When the pressure value in one of the coal injection tanks 1 is higher than the set value, coal injection is performed, and the corresponding second valve 14 is opened to perform coal injection.

[0027] The first feed pipe 5 and the second feed pipe 8 are both bent to facilitate the entry of materials into the coal injection tank 1;

[0028] The pipeline includes a tee pipe 15 connected to the boosting device 2 . Both ends of the tee pipe 15 are connected to the coal injection tank 1 through a flow guide pipe 16 . The first valve 3 is provided on the flow guide pipe 16 .

[0029] Working principle:

[0030] When the coal is poured into the coal injection tank 1, the second valve 14 on the coal discharging mechanism is first completely closed to prevent the coal from being directly discharged when the coal is poured into the coal injection tank 1. After the second valve 14 is closed, the required coal powder is fed into the first feeding pipe 5. The first filter screen 6 is provided to filter the coal powder and filter out the larger materials mixed in the coal powder. When too much coal powder accumulates on the first filter screen 6, due to the inclined setting of the first filter screen 6, the filtered materials and coal powder can slide into the first guide pipe 7 and then enter the second feeding pipe 8 through the first guide pipe 7. After the materials entering the second feeding pipe 8 fall on the second filter screen 9, the larger materials can be intercepted, and the qualified coal powder passes through the second filter screen 9 from the second feeding pipe 8 into the coal injection tank 1, and the larger materials intercepted slide directly into the discharge pipe 10. After the coal in the coal injection tank 1 is sprayed, the gate valve 11 is opened to discharge the materials for secondary crushing.

[0031] 2. After adding an appropriate amount of pulverized coal into the coal injection tank 1, close the third valve on the first feed pipe 5 to temporarily isolate the interior of the coal injection tank 1 from the outside, so that the booster device 2 can increase the pressure of the coal injection tank 1 to above the set value. The pressure sensor 4 can detect the pressure in the coal injection tank 1. When injecting coal, open the second valve 14 on one of the coal injection tanks 1 to inject coal. During the coal injection process, the pressure in the coal injection tank 1 must be kept stable so that the coal powder can be injected normally. After the coal powder in one of the coal injection tanks 1 is sprayed, the other coal injection tank 1 continues to inject coal. Then, according to the above steps, add coal to the coal injection tank 1 that has finished coal injection and wait for the next coal injection.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A blast furnace coal injection equipment, characterized in that: It comprises at least two coal injection pots (1), and a feeding mechanism is provided on the coal injection pots (1); A pressure boosting device (2) is provided on the coal injection tank (1), and the pressure boosting device (2) is connected to the coal injection tank (1) through pipelines. A first valve (3) is provided on each pipeline connected to the coal injection tank (1), and a pressure sensor (4) is provided in the coal injection tank (1); A coal discharging mechanism is provided on the lower side of the coal injection tank (1), and the coal discharging mechanism comprises a feed pipe (12) provided at the lower end of each of the two coal injection tanks (1). The lower ends of the two feed pipes (12) are connected to the same coal injection pipe (13), and a second valve (14) is provided on each of the feed pipes (12).

2. A blast furnace coal injection equipment according to claim 1, characterized in that: The feeding mechanism comprises a first feeding pipe (5) connected to the coal injection pot (1), a first filter screen (6) being obliquely provided in the first feeding pipe (5), a second feeding pipe (8) being connected to the side of the first feeding pipe (5) through a first guide pipe (7), and the lower side of the first guide pipe (7) is flush with the lower end of the first filter screen (6), a second filter screen (9) being obliquely provided in the second feeding pipe (8) and lower than the first guide pipe (7), a discharge pipe (10) being connected to the side of the second feeding pipe (8) and the lower side of which is flush with the second filter screen (9), a gate valve (11) being provided on the discharge pipe (10), and the lower ends of the first feeding pipe (5) and the second feeding pipe (8) are both connected to the coal injection pot (1).

3. A blast furnace coal injection equipment according to claim 2, characterized in that: The upper end of the second feeding pipe (8) is closed.

4. The blast furnace coal injection equipment according to claim 2, characterized in that: The first feeding pipe (5) and the second feeding pipe (8) are both bent.

5. The blast furnace coal injection equipment according to claim 1, characterized in that: The pipeline comprises a three-way pipe (15) connected to the boosting device (2), both ends of the three-way pipe (15) are connected to the coal injection tank (1) through a guide pipe (16), and the first valve (3) is arranged on the guide pipe (16).

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