Coal injection pipeline system

Abstract

The utility model discloses a coal injection pipeline system, which belongs to the field of pipeline transformation and comprises a first blast furnace coal injection pipeline system and a second blast furnace coal injection pipeline system which are used for injecting coal powder into a first blast furnace and a second blast furnace from a coal storage tank, on one hand, any coal storage tank can supply coal to any blast furnace, when the coal amount of one coal storage tank is not enough, the coal storage tank can be rapidly replaced by other coal storage tanks, continuous production cannot be affected, and each filter is provided with a standby filter; and on the other hand, the resistance of the pipeline to the pulverized coal is reduced, the situation that the pulverized coal is accumulated at the joint of the stokehole pipeline and the intercommunication pipeline during working is not prone to occurring, the smoothness of the pipeline is guaranteed, the conveying efficiency of the pulverized coal is improved, and meanwhile the abrasion rate of the pipeline is reduced.

Description

Technical Field

[0001] The utility model relates to a pipeline system, in particular to a coal injection pipeline system, and belongs to the technical field of pipeline transformation. Background Art

[0002] Coal injection refers to the process of blowing coal blocks ground into coal powder from the coal storage tank into the blast furnace through the coal injection pipe, so as to meet the heat required for blast furnace ironmaking. Coal injection is an important link in the steel production process and is related to the efficiency and production cost of ironmaking.

[0003] The original blast furnace coal injection system only obtained coal powder from a fixed coal storage tank through a single coal pipeline. When the coal storage tank or coal pipeline malfunctioned and needed maintenance, or when the coal powder reserve in the coal storage tank was insufficient, the operation of the entire system needed to be suspended. The blast furnace could no longer provide a heat source for ironmaking, delaying production progress.

[0004] Coal injection pipeline interconnection refers to the establishment of interconnecting pipelines in multiple blast furnace coal injection systems to realize the mutual delivery of coal powder between different blast furnaces. Through the interconnecting pipelines, when the coal injection system of a blast furnace fails or is under maintenance, coal powder can be supplied through the coal injection systems of other blast furnaces to ensure the stable operation of the blast furnace and avoid production interruption caused by suspension of injection. In addition, the mutual delivery and protection of coal powder can be achieved through the interconnecting pipelines, which reduces the pressure on the single pulverizing system, reduces the equipment failure rate, and thus reduces maintenance costs and downtime losses.

[0005] However, there are often corners between interconnecting pipes and coal injection pipes. These corners easily form dead spots, causing coal dust to accumulate there, affecting the smooth flow of the pipes. Furthermore, corners increase the resistance of the pipes to the coal dust, reducing conveying efficiency and even causing increased pipe wear and tear, increasing maintenance costs. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a coal injection pipeline system, which, on the one hand, can realize that any coal storage tank can supply coal to any blast furnace, and when the coal volume of a coal storage tank is insufficient, it can be quickly replaced by other coal storage tanks without affecting continuous production, and each filter is equipped with a spare filter; on the other hand, the resistance of the pipeline to coal powder is reduced, and coal powder is not easily accumulated at the connection between the furnace front pipeline and the interconnecting pipeline during operation, thereby ensuring the smoothness of the pipeline, improving the coal powder transportation efficiency, and slowing down the wear rate of the pipeline.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A coal injection pipeline system, comprising a No. 1 blast furnace coal injection pipeline system and a No. 2 blast furnace coal injection pipeline system for injecting coal powder from a coal storage tank into the interior of the No. 1 blast furnace and the No. 2 blast furnace, wherein the No. 1 blast furnace coal injection pipeline system comprises a No. 1 coal storage tank and a No. 2 coal storage tank, the outlets of the No. 1 coal storage tank and the No. 2 coal storage tank are respectively connected to a branch pipeline I, the two branch pipelines I are then divided into two branch pipelines II after the intersection, the branch pipelines II are each provided with a No. 1 filter, the inlet and outlet pipelines of the No. 1 filter are each provided with a valve I, the two branch pipelines II are connected to the No. 1 blast furnace front pipeline after the intersection; the No. 2 blast furnace coal injection pipeline system comprises a No. 3 coal storage tank and a No. 4 coal storage tank, the outlets of the No. 3 coal storage tank and the No. 4 coal storage tank are respectively connected There is a branch pipe III, and the two branch pipes III are divided into two branch pipes IV after they intersect. A No. 2 filter is provided on the branch pipe IV, and a valve II is provided on the inlet and outlet pipes of the No. 2 filter. The two branch pipes IV are connected to the No. 2 blast furnace after they intersect at the No. 2 furnace-front pipe; a No. 1 interconnecting pipe with a valve V that sprays from the No. 1 furnace-front pipe into the No. 2 furnace-front pipe and a No. 2 interconnecting pipe with a valve VI that sprays from the No. 2 furnace-front pipe into the No. 1 furnace-front pipe are respectively provided between the No. 1 furnace-front pipe and the No. 2 furnace-front pipe, and the positions connected with the No. 1 furnace-front pipe and the No. 2 furnace-front pipe are both arc structures, and the angle between the inlet end and the furnace-front pipe of the arc structure gradually increases, and the angle between the outlet end and the furnace-front pipe gradually decreases.

[0009] A further improvement of the technical solution of the present utility model is that two valves III and valve IV are respectively provided on each of the branch pipelines I and III.

[0010] A further improvement of the technical solution of the present utility model is that the No. 1 interconnecting pipeline and the No. 2 interconnecting pipeline are respectively provided with an electric valve I and an electric valve II.

[0011] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

[0012] The utility model comprises a No. 1 blast furnace coal injection pipeline system and a No. 2 blast furnace coal injection pipeline system for injecting coal powder from a coal storage tank into the interiors of the No. 1 blast furnace and the No. 2 blast furnace, the No. 1 blast furnace coal injection pipeline system comprises a No. 1 coal storage tank and a No. 2 coal storage tank, the outlets of the No. 1 coal storage tank and the No. 2 coal storage tank are respectively connected with a branch pipeline I, the two branch pipelines I are then divided into two branch pipelines II after they are intersected, the branch pipeline II is provided with a No. 1 filter, the inlet and outlet pipelines of the No. 1 filter are both provided with a valve I, the two branch pipelines II are connected to the No. 1 furnace front pipeline and then connected to the No. 1 blast furnace; the No. 2 blast furnace coal injection pipeline system comprises a No. 3 coal storage tank and a No. 4 coal storage tank, the outlets of the No. 3 coal storage tank and the No. 4 coal storage tank are respectively connected with a branch pipeline III, the two branch pipelines III are then divided into two branch pipelines IV after they are intersected, the branch pipeline IV is provided with a No. 2 filter, the inlet and outlet pipelines of the No. 2 filter are both provided with a valve II, the two branch pipelines IV are intersected at the No. 2 blast furnace The front pipe is connected to the No. 2 blast furnace at the rear; between the No. 1 furnace front pipe and the No. 2 furnace front pipe, there are respectively provided a No. 1 interconnecting pipe with a valve V for spraying from the No. 1 furnace front pipe into the No. 2 furnace front pipe and a No. 2 interconnecting pipe with a valve VI for spraying from the No. 2 furnace front pipe into the No. 1 furnace front pipe, and the positions connected with the No. 1 furnace front pipe and the No. 2 furnace front pipe are both arc structures, and the arc structure has a gradually increasing angle between the inlet end and the furnace front pipe and a gradually decreasing angle between the outlet end and the furnace front pipe; on the one hand, any coal storage tank can be used to supply coal to any blast furnace, and when a coal storage tank has insufficient coal, it can be quickly replaced by other coal storage tanks without affecting continuous production, and each filter is equipped with a spare filter; on the other hand, the resistance of the pipeline to coal powder is reduced, and coal powder is not easily accumulated at the connection between the furnace front pipe and the interconnecting pipe during operation, which ensures the smoothness of the pipeline, improves the coal powder transportation efficiency, and slows down the wear rate of the pipeline.

[0013] The utility model provides two valves III and IV on each branch pipeline I and branch pipeline III respectively. When one of the valves fails and cannot be used normally, the pipeline can be controlled by the other valve to ensure the pulverized coal supply of the blast furnace.

[0014] In addition to valves V and VI, the No. 1 interconnecting pipeline and the No. 2 interconnecting pipeline of the utility model are also respectively provided with electric valves I and electric valves II. The staff can remotely control the opening and closing of the No. 1 interconnecting pipeline and the No. 2 interconnecting pipeline, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a connection diagram of the utility model.

[0016] Among them, 1. No. 1 blast furnace; 2. No. 2 blast furnace; 3. No. 1 coal storage tank; 4. No. 2 coal storage tank; 5. Branch pipe I; 6. Branch pipe II; 7. No. 1 filter; 8. No. 1 furnace front pipe; 9. No. 3 coal storage tank; 10. No. 4 coal storage tank; 11. Branch pipe III; 12. Branch pipe IV; 13. No. 2 filter; 14. No. 2 furnace front pipe; 15. No. 1 intercommunication pipe; 16. No. 2 intercommunication pipe; 17. Valve I; 18. Valve II; 19. Valve III; 20. Valve IV; 21. Valve V; 22. Valve VI; 23. Electric valve I; 24. Electric valve II. DETAILED DESCRIPTION

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

[0018] The utility model includes a No. 1 blast furnace coal injection pipeline system and a No. 2 blast furnace coal injection pipeline system for injecting pulverized coal from a coal storage tank into the interior of the No. 1 blast furnace 1 and the No. 2 blast furnace 2. The No. 1 blast furnace coal injection pipeline system includes a No. 1 coal storage tank 3 and a No. 2 coal storage tank 4. The outlets of the No. 1 coal storage tank 3 and the No. 2 coal storage tank 4 are respectively connected to a branch pipeline I 5. After the two branch pipelines I 5 intersect, they are divided into two branch pipelines II 6. The branch pipelines II 6 are both provided with a No. 1 filter 7. The No. 1 filter The inlet and outlet pipes of the filter 7 are both provided with valves I17, and the two branch pipes II6 are connected to the No. 1 blast furnace 1 after intersecting with the No. 1 furnace front pipe 8; the No. 2 blast furnace coal injection pipe system includes the No. 3 coal storage tank 9 and the No. 4 coal storage tank 10, and the outlets of the No. 3 coal storage tank 9 and the No. 4 coal storage tank 10 are respectively connected to the branch pipe III11, and the two branch pipes III11 are divided into two branch pipes IV12 after intersecting, and the branch pipes IV12 are both provided with the No. 2 filter 13, and the No. 2 filter 13 is connected to the No. 2 filter 13. A valve II 18 is provided on the inlet and outlet pipes of the filter 13, and the two branch pipes IV 12 intersect at the No. 2 furnace-front pipe 14 and then connect to the No. 2 blast furnace 2; a No. 1 interconnecting pipe 15 with a valve V 21 for spraying from the No. 1 furnace-front pipe 8 into the No. 2 furnace-front pipe 14 and a No. 2 interconnecting pipe 16 with a valve VI 22 for spraying from the No. 2 furnace-front pipe 14 into the No. 1 furnace-front pipe 8 are respectively provided between the No. 1 furnace-front pipe 8 and the No. 2 furnace-front pipe 14, and the positions connected with the No. 1 furnace-front pipe 8 and the No. 2 furnace-front pipe 14 are both arc structures, and the angle between the arc at the position where the No. 1 interconnecting pipe 15 connects to the No. 1 furnace-front pipe 8 and the connection point gradually increases, and the angle between the arc at the position where the No. 1 interconnecting pipe 15 connects to the No. 1 furnace-front pipe 8 and the connection point gradually decreases; the angle between the arc at the position where the No. 2 interconnecting pipe 16 connects to the No. 2 furnace-front pipe 14 and the connection point gradually increases, and the angle between the arc at the position where the No. 2 interconnecting pipe 16 connects to the No. 2 furnace-front pipe 14 and the connection point gradually decreases.

[0019] On the one hand, the utility model can realize that any coal storage tank can supply coal to any blast furnace. When the coal amount in a coal storage tank is insufficient, it can be quickly replaced by other coal storage tanks without affecting continuous production, and each filter is equipped with a spare filter. On the other hand, the resistance of the pipeline to coal powder is reduced. During operation, coal powder is not easily accumulated at the connection between the furnace front pipeline and the interconnecting pipeline, which ensures the smoothness of the pipeline, improves the coal powder transportation efficiency, and slows down the wear rate of the pipeline.

[0020] Each branch pipeline I5 and branch pipeline III11 is respectively provided with two valves III19 and valve IV20. When one of the valves fails and cannot be used normally, the pipeline can be controlled by the other valve to ensure the coal powder supply to the blast furnace.

[0021] In addition to valve V 21 and valve VI 22, the No. 1 interconnecting pipe 15 and the No. 2 interconnecting pipe 16 are also respectively provided with electric valve I 23 and electric valve II 24. The staff can remotely control the opening and closing of the No. 1 interconnecting pipe 15 and the No. 2 interconnecting pipe 16, saving time and effort.

Claims

1. A coal injection piping system comprising a No. 1 blast furnace coal injection piping system and a No. 2 blast furnace coal injection piping system for injecting pulverized coal from a coal storage tank into a No. 1 blast furnace (1) and a No. 2 blast furnace (2), characterized in that: The coal injection pipeline system of the No. 1 blast furnace comprises a No. 1 coal storage tank (3) and a No. 2 coal storage tank (4), the outlets of the No. 1 coal storage tank (3) and the No. 2 coal storage tank (4) are respectively connected to a branch pipeline I (5), the two branch pipelines I (5) are merged and then divided into two branch pipelines II (6), each branch pipeline II (6) is provided with a No. 1 filter (7), the inlet and outlet pipelines of the No. 1 filter (7) are both provided with a valve I (17), the two branch pipelines II (6) are merged with the No. 1 furnace front pipeline (8) and then connected to the No. 1 blast furnace (1); the coal injection pipeline system of the No. 2 blast furnace comprises a No. 3 coal storage tank (9) and a No. 4 coal storage tank (10), the outlets of the No. 3 coal storage tank (9) and the No. 4 coal storage tank (10) are respectively connected to a branch pipeline III (11), the two branch pipelines III (11) are merged and then divided into two branch pipelines IV (12), A No. 2 filter (13) is provided on each branch pipe IV (12), and a valve II (18) is provided on each inlet and outlet pipe of the No. 2 filter (13). The two branch pipes IV (12) are connected to the No. 2 blast furnace (2) after intersecting the No. 2 furnace front pipe (14). A No. 1 intercommunication pipe (15) with a valve V (21) for spraying from the No. 1 furnace front pipe (8) into the No. 2 furnace front pipe (14) and a No. 2 intercommunication pipe (16) with a valve VI (22) for spraying from the No. 2 furnace front pipe (14) into the No. 1 furnace front pipe (8) are respectively provided between the No. 1 furnace front pipe (8) and the No. 2 furnace front pipe (14). The positions connected with the No. 1 furnace front pipe (8) and the No. 2 furnace front pipe (14) are all arc structures, and the angle between the inlet end and the furnace front pipe of the arc structure gradually increases, and the angle between the outlet end and the furnace front pipe gradually decreases.

2. A coal injection pipeline system according to claim 1, characterized in that: Each of the branch pipelines I (5) and III (11) is provided with two valves III (19) and valve IV (20), respectively.

3. The coal injection pipeline system according to claim 1, characterized in that: The No. 1 intercommunication pipeline (15) and the No. 2 intercommunication pipeline (16) are respectively provided with an electric valve I (23) and an electric valve II (24).

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