Oxygen-pulverized coal mixing optimization device for blast furnace smelting

Abstract

The utility model relates to an oxygen-pulverized coal mixing optimization device for blast furnace smelting, and relates to the field of mixing devices for blast furnace smelting. The mixing device comprises a mixing shell, the mixing shell comprises a main shell and an installation pipe, the installation pipe is arranged at the head of the main shell and fixedly connected with the main shell, multiple pipe sets are symmetrically installed on the two sides of the main shell and fixedly connected with the main shell in a sealed mode, and a positioning seat is fixedly installed on the installation pipe; a mixing assembly is fixedly installed on the positioning base and extends into the main shell, and an air inlet frame base is installed at the lower end of the multi-pipe set. The mixing shell is designed to be of a structure that the main shell and the mounting pipe are matched, the multiple pipe sets are mounted on the two sides of the main shell, it is guaranteed that the purposes of split-flow powder feeding and gas feeding can be achieved through the multiple pipe sets during use, meanwhile, the positioning base is fixedly mounted on the mounting pipe, and the mixing assembly is fixedly mounted through the positioning base.

Description

Technical Field

[0001] The present application relates to the technical field of mixing devices for blast furnace smelting, and in particular to an oxygen-coal powder mixing optimization device for blast furnace smelting. Background Art

[0002] In the blast furnace smelting process, oxygen-coal powder injection technology is an important means to improve blast furnace production efficiency and reduce coke ratio. By injecting a mixture of oxygen and coal powder into the blast furnace, the combustion reaction in the furnace can be significantly enhanced, the furnace temperature can be increased, and the reduction process can be accelerated, thereby achieving high efficiency and low cost of blast furnace smelting.

[0003] A Chinese patent, published under the publication number CN201250239Y, discloses a blast furnace coal injection lance, specifically a lance for injecting pulverized coal into the tuyere of a blast furnace. The blast furnace coal injection lance comprises a telescopically connected inner and outer tubes. The center of the inner tube serves as a pulverized coal passage, and the inner and outer tubes enclose a compressed air passage. A swirl device is fixed to the air injection port of the compressed air passage. This blast furnace coal injection lance improves the mixing of pulverized coal with blast air and compressed air, enhancing the cooling effect of the compressed air. It also features a simple structure and a long service life, making it suitable for widespread application.

[0004] Regarding the above-mentioned related technologies, it is found that the existing oxygen-coal powder mixing for blast furnace smelting is mostly carried out directly by using a coal injection gun. When in use, this equipment directly opens a side pipe on the side of the coal powder pipe as a compressed air inlet. This method is prone to uneven mixing of coal powder and air during use, affecting the combustion reaction inside the blast furnace. Utility Model Content

[0005] In order to achieve the goal of increasing the degree of mixing between pulverized coal and air, the present application provides an oxygen-pulverized coal mixing optimization device for blast furnace smelting.

[0006] The present application provides an oxygen-coal mixing optimization device for blast furnace smelting, which adopts the following technical solution:

[0007] An oxygen-coal powder mixing optimization device for blast furnace smelting includes a mixing shell, which includes a main shell and a mounting pipe. The mounting pipe is arranged at the head of the main shell and is fixedly connected to the main shell. Multi-tube groups are symmetrically installed on both sides of the main shell, and the multi-tube groups are sealed and fixedly connected to the main shell. A positioning seat is fixedly installed on the mounting pipe, and a mixing assembly is fixedly installed on the positioning seat, and the mixing assembly extends into the main shell. An air intake frame is installed at the lower end of the multi-tube group, and the air intake frame is sealed and fixedly connected to the multi-tube group.

[0008] By adopting the technical scheme, the mixed shell is designed as a structure matched with the mounting pipe, the main shell can be used as an oxygen and coal powder mixing place, the mounting pipe is arranged on the main shell to ensure that the mounting pipe is matched with the mounting seat, then the mixed assembly can be installed through the mounting seat, the mounting seat is connected with the mounting pipe through bolts, so that the mixed assembly can be quickly and stably installed, and the mixed assembly can be directly taken out from the main shell through the mounting seat when maintenance is needed, which is very convenient to operate, and the multi-pipe group is symmetrically arranged on the two sides of the main shell, so that the multi-pipe group can be used as an air and coal powder feeding structure when used.

[0009] Optionally, the main shell comprises a shell body and an auxiliary pipe, the auxiliary pipe is arranged at one end of the shell body away from the mounting pipe, and the auxiliary pipe is integrally formed with the mounting pipe.

[0010] By adopting the technical scheme, the main shell is designed as a structure matched with the auxiliary pipe, so that the shell body can be inserted into the blast furnace through the auxiliary pipe for supplying coal powder when used.

[0011] Optionally, the multi-pipe group comprises side pipes and connecting plates, the side pipes are uniformly arranged at one end of the outer side of the shell body, and the connecting plates are fixedly arranged at the other end of the side pipes, and the connecting plates are provided with air passage grooves in communication with the side pipes.

[0012] By adopting the technical scheme, the multi-pipe group is designed as a structure matched with the side pipes and the connecting plates, so that the side pipes can be uniformly arranged on the outer side of the shell body when used, air supply or coal powder supply can be conveniently realized in the shell body through different side pipes, the connecting plates are arranged to ensure that the side pipes are connected and fixed with each other, and the connecting plates are arranged to be connected with the air inlet frame, so that the air passage grooves in the connecting plates are in communication with the side pipes.

[0013] Optionally, the mounting seat comprises a top disc and a sleeve, the sleeve is coaxially arranged at the lower end surface of the top disc, and the sleeve is integrally formed with the top disc.

[0014] By adopting the technical scheme, the mounting seat is designed as a structure matched with the top disc and the sleeve, so that the top disc can be sleeved and arranged on the mounting pipe through the sleeve for connection when used, and the top disc can stably install the mixed assembly for use.

[0015] Optionally, the mixed assembly comprises a motor, a rotating rod and a mixing impeller, the motor is fixedly arranged at the upper end surface of the top disc, the rotating rod is arranged at the output end of the motor and extends into the shell body, and the mixing impeller is sleeved and fixed on the rotating rod.

[0016] By adopting the above technical solution, and designing the mixing assembly into a structure in which a motor, a rotating rod and a mixing impeller cooperate, the motor can be used to drive the rotating rod and the mixing impeller to rotate when it is easy to use, and then the mixing impeller can be used to mix the air and coal powder in the shell.

[0017] Optionally, the mixing impeller includes a wheel sleeve, a support rod and blades, the support rod is fixedly installed between the wheel sleeves, the blades are evenly installed on the outer surface of the wheel sleeve along the circumferential direction, and the blades are fixedly connected to the wheel sleeve.

[0018] By adopting the above technical solution, the mixing impeller is designed to be a structure in which a wheel sleeve, a support rod and blades cooperate with each other. When it is easy to use, the wheel sleeve can be put on the rotating rod for fixation, and the support rod is set to ensure that the wheel sleeves can support each other, ensuring that the mixing impeller is more stable as a whole during use. In this way, when the rotating rod rotates, the blades on the wheel sleeve can be driven to perform mixing operations.

[0019] Optionally, the air intake frame includes a first diverter group, a second diverter group and a diverter seat corresponding to the connecting plate, the second diverter group is fixedly installed on the upper end surface of the first diverter group, and the first diverter group and the second diverter group are both connected to the diverter seat.

[0020] By adopting the above technical solution, and designing the air inlet frame into a structure in which the first diversion group, the second diversion group and the diversion seat cooperate, the first diversion group and the second diversion group can be used to cross-supply air and powder to the diversion seats at both ends for convenient use.

[0021] Optionally, the first diversion group and the second diversion group both include a feed pipe, a first discharge pipe, a second discharge pipe and a third discharge pipe, and the diversion seat is provided with a plurality of air guide grooves corresponding to the ventilation grooves.

[0022] By adopting the above technical solution, by designing the first diversion group and the second diversion group into a structure that cooperates with the feed pipe, the first discharge pipe, the second discharge pipe and the third discharge pipe, it can be connected to the external air supply and powder supply equipment through the feed pipe when it is easy to use, ensuring that the air or coal powder can be diverted through the first discharge pipe, the second discharge pipe and the third discharge pipe after entering from the feed pipe, and then stably enter the ventilation groove from the air guide groove.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: the present application designs the mixing shell into a structure that cooperates with the main shell and the mounting tube, and installs multiple tube groups on both sides of the main shell to ensure that the purpose of diverting powder and air intake can be achieved through the multiple tube groups when in use. At the same time, by fixing the positioning seat on the mounting tube and fixing the mixing assembly through the positioning seat, the other coal powder entering the shell can be mixed in real time through the mixing assembly when in use, and by installing the air intake frame at the lower end of the multiple tube group, it is ensured that the coal powder and air can be distributed at intervals when entering the shell, ensuring that the air and coal powder are better mixed with each other, and has the advantages of convenient feeding and uniform mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the decomposition structure of the overall structure in the embodiment of the present application.

[0025] Figure 2 It is a three-dimensional diagram of the mixing shell and the multi-tube group in the embodiment of the present application.

[0026] Figure 3 yes Figure 2 Bottom view of the device shown.

[0027] Figure 4 It is a three-dimensional diagram of the coordination between the positioning seat and the mixing assembly in the embodiment of the present application.

[0028] Figure 5 It is a three-dimensional diagram of the air intake frame in the embodiment of the present application.

[0029] Figure 6 yes Figure 5 Top view of the device shown.

[0030] Explanation of the accompanying drawings: 1. Mixing shell; 11. Main shell; 111. Shell; 112. Auxiliary insert; 12. Mounting tube; 2. Multi-tube group; 21. Side duct; 22. Connecting plate; 221. Vent groove; 3. Positioning seat; 31. Top plate; 32. Sleeve; 4. Mixing assembly; 41. Motor; 42. Rotating rod; 43. Mixing impeller; 431. Wheel sleeve; 432. Support rod; 433. Blade; 5. Air intake frame; 51. First diversion group; 511. Feed pipe; 512. First discharge pipe; 513. Second discharge pipe; 514. Third discharge pipe; 52. Second diversion group; 53. Diversion seat; 531. Air guide groove. DETAILED DESCRIPTION

[0031] The present application is further described in detail below with reference to the accompanying drawings.

[0032] The present application discloses an oxygen-coal powder mixing optimization device for blast furnace smelting. Figure 1 、 Figure 2and Figure 3 As shown in the figure, an oxygen-pulverized coal mixing optimization device for blast furnace smelting comprises a mixing shell 1, the mixing shell 1 comprises a main shell 11 and a mounting pipe 12, the mounting pipe 12 is arranged at the head of the main shell 11, and the mounting pipe 12 is fixedly connected with the main shell 11, a plurality of pipe groups 2 are symmetrically arranged at the two sides of the main shell 11, the pipe groups 2 are sealingly and fixedly connected with the main shell 11, a positioning seat 3 is fixedly arranged on the mounting pipe 12, a mixing assembly 4 is fixedly arranged on the positioning seat 3, and the mixing assembly 4 extends into the main shell 11, and an air inlet frame seat 5 is arranged at the lower end of the pipe group 2, and the air inlet frame seat 5 is sealingly and fixedly connected with the pipe group 2. By designing the mixing shell 1 into the structure of the main shell 11 and the mounting pipe 12, the main shell 11 can be used as an oxygen and pulverized coal mixing place, the mounting pipe 12 is arranged on the main shell 11 to ensure that the positioning seat 3 is installed through the mounting pipe 12, then the mixing assembly 4 can be installed through the positioning seat 3, the positioning seat 3 is connected with the mounting pipe 12 through bolts, so that the mixing assembly 4 can be quickly and stably installed, and when maintenance is needed, the mixing assembly 4 can be directly taken out of the main shell 11 through the positioning seat 3, which is very convenient to operate, and the pipe groups 2 are symmetrically arranged at the two sides of the main shell 11, so that the pipe groups 2 can be used as air and pulverized coal feeding structures during use, and the air inlet frame seat 5 is arranged at the lower end of the pipe group 2 to guide air through the pipe group 2. The main shell 11 comprises a shell body 111 and an auxiliary insertion pipe 112, the auxiliary insertion pipe 112 is arranged at the end of the shell body 111 away from the mounting pipe 12, and the auxiliary insertion pipe 112 is integrally formed with the mounting pipe 12. By designing the main shell 11 into the structure of the shell body 111 and the auxiliary insertion pipe 112, the shell body 111 can be inserted into the blast furnace through the auxiliary insertion pipe 112 for supplying pulverized coal during use.

[0033] Referring to Figure 3 As shown in the figure, the pipe group 2 comprises side pipes 21 and connecting plates 22, the side pipes 21 are uniformly arranged at one end of the outer side of the shell body 111, the connecting plates 22 are fixedly arranged at the other end of the side pipes 21, and air passages 221 are arranged in the connecting plates 22 and communicate with the side pipes 21. By designing the pipe group 2 into the structure of the side pipes 21 and the connecting plates 22, the side pipes 21 can be uniformly arranged on the outer side of the shell body 111 during use, air or pulverized coal can be conveniently supplied to the inside of the shell body 111 through different side pipes 21, the side pipes 21 are fixedly connected with each other through the connecting plates 22, the connecting plates 22 are conveniently connected with the air inlet frame seat 5, and the air passages 221 in the connecting plates 22 communicate with the side pipes 21.

[0034] Referring to Figure 4As shown, the positioning base 3 includes a top plate 31 and a sleeve 32. The sleeve 32 is coaxially arranged on the lower end surface of the top plate 31 and is integrally formed with the top plate 31. By designing the positioning base 3 with the top plate 31 and the sleeve 32 cooperating, the top plate 31 can be easily mounted on the mounting tube 12 via the sleeve 32 for connection during use, ensuring that the top plate 31 can stably mount the mixing assembly 4 for use.

[0035] Reference Figure 4 As shown, the mixing assembly 4 includes a motor 41, a rotating rod 42, and a mixing impeller 43. The motor 41 is fixedly mounted on the upper end surface of the top plate 31, the rotating rod 42 is mounted on the output end of the motor 41, and the rotating rod 42 extends into the housing 111. The mixing impeller 43 is sleeved and fixed on the rotating rod 42. By designing the mixing assembly 4 as a structure in which the motor 41, the rotating rod 42, and the mixing impeller 43 cooperate, the motor 41 can be used to drive the rotating rod 42 and the mixing impeller 43 to rotate when it is easy to use, and then the mixing impeller 43 can achieve mixing of the air and coal powder in the housing 111. The mixing impeller 43 includes a wheel sleeve 431, a support rod 432, and blades 433. The support rod 432 is fixedly mounted between the wheel sleeves 431. The blades 433 are evenly mounted on the outer surface of the wheel sleeve 431 along the circumferential direction, and the blades 433 are fixedly connected to the wheel sleeve 431. By designing the mixing impeller 43 into a structure in which a wheel sleeve 431, a support rod 432 and blades 433 cooperate, the wheel sleeve 431 can be mounted on the rotating rod 42 for easy use, and the support rod 432 is provided to ensure that the wheel sleeves 431 can support each other, ensuring that the mixing impeller is more stable as a whole during use. In this way, when the rotating rod 42 rotates, it can drive the blades 433 on the wheel sleeve 431 to perform mixing operations.

[0036] Reference Figure 5 and Figure 6As shown, the air intake frame 5 includes a first diverter group 51, a second diverter group 52, and a diverter seat 53 corresponding to the connecting plate 22. The second diverter group 52 is fixedly mounted on the upper end surface of the first diverter group 51, and the first diverter group 51 and the second diverter group 52 are both connected to the diverter seat 53. By designing the air intake frame 5 into a structure in which the first diverter group 51, the second diverter group 52, and the diverter seat 53 cooperate, the first diverter group 51 and the second diverter group 52 can be used to cross-supply air and powder to the diverter seats 53 at both ends for convenient use. The first diverter group 51 and the second diverter group 52 each include a feed pipe 511, a first discharge pipe 512, a second discharge pipe 513, and a third discharge pipe 514. The diverter seat 53 is provided with a plurality of air guide grooves 531 corresponding to the ventilation grooves 221. By designing the first diversion group 51 and the second diversion group 52 into a structure that cooperates with the feed pipe 511, the first discharge pipe 512, the second discharge pipe 513 and the third discharge pipe 514, the feed pipe 511 can be used to connect with the external air supply and powder supply equipment when it is easy to use, ensuring that after the air or coal powder enters from the feed pipe 511, it can be diverted through the first discharge pipe 512, the second discharge pipe 513 and the third discharge pipe 514, and then stably enter the ventilation groove 221 from the air guide groove 531.

[0037] The implementation principle of an oxygen-coal powder mixing optimization device for blast furnace smelting in an embodiment of the present application is as follows: when in use, the feed pipes 511 on the first diversion group 51 and the second diversion group 52 are respectively connected to the external air supply and coal powder supply devices. After the air enters from the feed pipe 511 of the first diversion group 51, it is respectively supplied to the air guide groove 531 of the diversion seat 53 through the first discharge pipe 512, the second discharge pipe 513 and the third discharge pipe 514. After the coal powder enters from the feed pipe 511 of the second diversion group 52, it is respectively supplied to the other air guide grooves 531 of the diversion seat 53 through the first discharge pipe 512, the second discharge pipe 513 and the third discharge pipe 514, and finally enters the mixing shell 1 through the multi-tube group 2. After the coal powder and air enter the shell 111 at intervals, they can be mixed and stirred through the mixing component 4 and then quickly discharged from the auxiliary insert 112 into the blast furnace for powder supply.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An oxygen-coal powder mixing optimization device for blast furnace smelting, comprising a mixing shell (1), characterized in that: The mixing shell (1) comprises a main shell (11) and a mounting tube (12), wherein the mounting tube (12) is arranged at the head of the main shell (11) and is fixedly connected to the main shell (11), and multiple tube groups (2) are symmetrically mounted on both sides of the main shell (11), and the multiple tube groups (2) are sealed and fixedly connected to the main shell (11), a positioning seat (3) is fixedly mounted on the mounting tube (12), a mixing assembly (4) is fixedly mounted on the positioning seat (3), and the mixing assembly (4) extends into the main shell (11), and an air intake frame (5) is mounted on the lower end of the multiple tube group (2), and the air intake frame (5) is sealed and fixedly connected to the multiple tube group (2).

2. The oxygen-coal pulverized mixing optimization device for blast furnace smelting according to claim 1, characterized in that: The main shell (11) comprises a shell (111) and an auxiliary cannula (112); the auxiliary cannula (112) is arranged at one end of the shell (111) away from the mounting tube (12), and the auxiliary cannula (112) and the mounting tube (12) are integrally formed.

3. The oxygen-coal pulverized mixing optimization device for blast furnace smelting according to claim 2, characterized in that: The multi-tube group (2) comprises a side conduit (21) and a connecting plate (22), one end of the side conduit (21) being evenly mounted on the outer surface of the housing (111), the connecting plate (22) being fixedly mounted on the other end of the side conduit (21), and a venting groove (221) communicating with the side conduit (21) being provided on the connecting plate (22).

4. The oxygen-coal pulverized mixing optimization device for blast furnace smelting according to claim 3, characterized in that: The positioning seat (3) comprises a top plate (31) and a sleeve (32), wherein the sleeve (32) is coaxially arranged on the lower end surface of the top plate (31), and the sleeve (32) and the top plate (31) are integrally formed.

5. The oxygen-coal pulverized mixing optimization device for blast furnace smelting according to claim 4, characterized in that: The mixing assembly (4) comprises a motor (41), a rotating rod (42) and a mixing impeller (43); the motor (41) is fixedly mounted on the upper end surface of the top plate (31); the rotating rod (42) is mounted on the output end of the motor (41), and the rotating rod (42) extends into the housing (111); and the mixing impeller (43) is sleeved and fixed on the rotating rod (42).

6. The oxygen-coal pulverized mixing optimization device for blast furnace smelting according to claim 5, characterized in that: The mixing impeller (43) comprises a wheel sleeve (431), a support rod (432), and blades (433); the support rod (432) is fixedly mounted between the wheel sleeve (431); the blades (433) are evenly mounted on the outer surface of the wheel sleeve (431) along the circumferential direction, and the blades (433) are fixedly connected to the wheel sleeve (431).

7. The oxygen-coal pulverized mixing optimization device for blast furnace smelting according to claim 6, characterized in that: The air intake frame (5) comprises a first diverter group (51), a second diverter group (52), and a diverter seat (53) corresponding to the connecting plate (22); the second diverter group (52) is fixedly mounted on the upper end surface of the first diverter group (51), and both the first diverter group (51) and the second diverter group (52) are in communication with the diverter seat (53).

8. The oxygen-coal pulverized mixing optimization device for blast furnace smelting according to claim 7, characterized in that: The first flow diversion group (51) and the second flow diversion group (52) both comprise a feed pipe (511), a first discharge pipe (512), a second discharge pipe (513), and a third discharge pipe (514). The flow diversion seat (53) is provided with a plurality of air guide grooves (531) corresponding to the ventilation grooves (221).

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