Pressurizing and diffusing filter for external use of injection tank

Abstract

The utility model discloses an external pressurizing and diffusing filter for an injection tank, and belongs to the technical field of blast furnace coal injection. An external pressurizing and diffusing filter for an injection tank comprises a pressure-resistant shell and further comprises a mounting frame, the mounting frame is located in the pressure-resistant shell, a pressure-resistant seal head is arranged above the pressure-resistant shell, a switching pipeline is arranged below the pressure-resistant shell, a pressing plate is arranged above a pattern plate, a protective cover is arranged below the pattern plate, and the pressure-resistant seal head and the switching pipeline are arranged in the pressure-resistant shell. And a filter element is arranged in the protective cover. In order to solve the problems that a pulverized coal filter plate is small in ventilation volume, easy to block and incapable of meeting the long-time use requirement of an injection tank, when the injection tank is diffused, gas carries pulverized coal to penetrate through a filter element and then leave from a diffusion pipeline, the pulverized coal is intercepted in a pressure-resistant shell by the filter element, and when the injection tank is pressurized, the pulverized coal is discharged from the diffusion pipeline. And the pulverized coal attached to the surface of the filter element is brought back to the interior of the injection tank by the high-pressure gas, so that the waste of the pulverized coal is avoided, and the long-time use requirement of the injection tank is met.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace coal injection, in particular to a pressurized discharge filter for an external injection tank. Background Art

[0002] Blast furnace coal injection is a revolutionary and major measure for modern blast furnace ironmaking technology. It has become the most direct and effective technical means to reduce production costs in blast furnace ironmaking systems. The injection tank is the main equipment for coal powder injection in the blast furnace coal injection process. After the injection tank is filled with coal powder, the injection tank is pressurized to the set value with high-pressure gas and then injection begins. During the coal injection process, the tank pressure must be maintained stable at the set value. When the amount of coal powder in the injection tank is reduced to the lower limit, the injection tank stops spraying, and then the high-pressure gas in the tank is released (pressure relief) to put the injection tank at normal pressure so that coal powder can be reloaded.

[0003] The early design of the spray tank does not have a pressurized discharge filter device. During the pressure relief process, the coal powder in the tank will be discharged along with the high-pressure gas, resulting in a waste of coal powder, while causing wear on the pipeline and polluting the environment. When discharging, the existing spray tank mainly relies on setting a coal powder filter plate at the discharge port to intercept the coal powder in the gas. The coal powder filter plate has a small air permeability and is easy to clog, which cannot meet the long-term use requirements of the spray tank. Therefore, it does not meet the existing needs, and a pressurized discharge filter for external use of the spray tank is proposed. Utility Model Content

[0004] The utility model aims to provide a pressurized discharge filter for an external use of a spray tank. A mounting frame is arranged inside a pressure-resistant shell, and a filter element is arranged inside the mounting frame. When the spray tank is discharged, the gas carrying the coal powder first goes from the spray tank to the inside of the pressure-resistant shell, then passes through the filter element, and finally leaves from the discharge pipe, wherein the coal powder is retained inside the pressure-resistant shell by the filter element, thereby avoiding the waste of coal powder and solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressurized discharge filter for external use in a spray tank, comprising a pressure-resistant shell and a mounting frame, wherein the mounting frame is located inside the pressure-resistant shell, a pressure-resistant head is arranged above the pressure-resistant shell, a transfer pipe is arranged below the pressure-resistant shell, an upper flange ring and a lower flange ring are arranged at the upper and lower ends of the pressure-resistant shell, a first flange ring is arranged at the lower end of the pressure-resistant head, a second flange ring is arranged at the upper end of the transfer pipe, the mounting frame comprises a flower plate, a bottom plate and a support column, a pressure plate is arranged above the flower plate, a protective cover is arranged below the flower plate, and a filter element is arranged inside the protective cover.

[0006] Preferably, the flower plate is located between the upper flange ring and the first flange ring, a sealing ring is arranged between the flower plate and the upper flange ring, a sealing ring is arranged between the flower plate and the first flange ring, the upper flange ring and the first flange ring are connected by bolts, and the lower flange ring and the second flange ring are connected by bolts.

[0007] Preferably, a relief pipe and a pressure-charging pipe are provided above the pressure-resistant head, the pressure-resistant head and the relief pipe are connected, the pressure-resistant head and the pressure-charging pipe are connected, and the lower end of the transfer pipe is connected to the spray tank.

[0008] Preferably, the base plate is located below the flower plate, the upper and lower ends of the support column are respectively connected to the flower plate and the base plate, a plurality of through holes are provided on the side of the protective cover, and the upper and lower ends of the protective cover are respectively connected to the flower plate and the base plate.

[0009] Preferably, a positioning ring is provided on the top of the flower plate, a fixing block is provided under the bottom plate, a guide column is provided inside the filter element, a limiting ring is provided at the upper end of the filter element, and the guide column is connected to the filter element through reinforcing ribs.

[0010] Preferably, the limit ring is located inside the positioning ring, the lower end of the guide column passes through the bottom plate to the inside of the fixed block, the guide column is threadedly connected to the fixed block, the filter element is constructed of a stainless steel sintered mesh, at least six filter elements are provided, and at least two reinforcing ribs are provided inside a single filter element.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model arranges a mounting frame inside the pressure-resistant shell, and a filter element inside the mounting frame. When the spray tank is released, the gas carrying coal powder first goes from the spray tank to the inside of the pressure-resistant shell, then passes through the filter element, and finally leaves from the release pipe, wherein the coal powder is retained on the surface of the filter element. When the spray tank is pressurized, the high-pressure gas first passes through the pressurization pipe, then passes through the filter element, and finally enters the inside of the spray tank, wherein the coal powder attached to the surface of the filter element is brought back to the inside of the spray tank by the high-pressure gas, thereby avoiding the waste of coal powder and further satisfying the demand for long-term use of the spray tank.

[0013] 2. The utility model arranges a guide column inside the filter element and a limit ring on the upper end of the filter element. When installing the filter element, first put the filter element into the protective cover, and thread the lower end of the guide column with the fixing block, then put the limit ring inside the positioning ring, and finally fix the pressure plate on the flower plate to complete the installation of the filter element. Compared with the traditional method of installing the filter element with screws, the installation time is greatly reduced. At the same time, the protective cover also reduces the impact of airflow on the filter element, thereby extending the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is the overall front view of the utility model;

[0015] Figure 2 It is an overall cross-sectional view of the utility model;

[0016] Figure 3 It is a schematic diagram of the local structure of the filter element of the utility model;

[0017] Figure 4 It is a schematic diagram of the local structure of the mounting frame of the utility model.

[0018] In the figure: 1. pressure-resistant shell; 101. upper flange ring; 102. lower flange ring; 2. pressure-resistant head; 201. vent pipe; 202. pressurized pipe; 203. first flange ring; 3. bolts; 4. transfer pipe; 401. second flange ring; 5. protective cover; 6. pressure plate; 7. filter element; 701. guide column; 702. reinforcing rib; 703. limit ring; 8. sealing ring; 9. mounting frame; 901. fixing block; 902. flower plate; 903. bottom plate; 904. support column; 905. positioning ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In order to solve the problem that the coal powder filter plate has a small air permeability and is easy to clog, and cannot meet the long-term use requirements of the spray tank, please refer to Figure 1-4 The utility model provides an embodiment: a pressurized discharge filter for external use in a spray tank, comprising a pressure-resistant shell 1 and a mounting frame 9, wherein the mounting frame 9 is located inside the pressure-resistant shell 1, a pressure-resistant head 2 is arranged above the pressure-resistant shell 1, a transfer pipe 4 is arranged below the pressure-resistant shell 1, an upper flange ring 101 and a lower flange ring 102 are arranged at the upper and lower ends of the pressure-resistant shell 1, a first flange ring 203 is arranged at the lower end of the pressure-resistant head 2, a second flange ring 401 is arranged at the upper end of the transfer pipe 4, the mounting frame 9 comprises a flower plate 902, a bottom plate 903 and a support column 904, a pressure plate 6 is arranged above the flower plate 902, a protective cover 5 is arranged below the flower plate 902, and a filter element 7 is arranged inside the protective cover 5.

[0021] The flower plate 902 is located between the upper flange ring 101 and the first flange ring 203, a sealing ring 8 is arranged between the flower plate 902 and the upper flange ring 101, a sealing ring 8 is arranged between the flower plate 902 and the first flange ring 203, the upper flange ring 101 and the first flange ring 203 are connected by bolts 3, the lower flange ring 102 and the second flange ring 401 are connected by bolts 3, a relief pipe 201 and a pressurizing pipe 202 are arranged above the pressure-resistant head 2, the pressure-resistant head 2 and the relief pipe 201 are connected, the pressure-resistant head 2 and the pressurizing pipe 202 are connected, and the lower end of the adapter pipe 4 is connected to the spray tank.

[0022] When the spray tank is released, the gas carrying coal powder first goes from the spray tank to the inside of the pressure-resistant shell 1, then passes through the filter element 7, and finally leaves from the release pipe 201, wherein the coal powder is retained on the surface of the filter element 7; when the spray tank is pressurized, the high-pressure gas first passes through the pressurizing pipe 202, then passes through the filter element 7, and finally enters the inside of the spray tank along the transfer pipe 4, wherein the coal powder attached to the surface of the filter element 7 is brought back to the inside of the spray tank by the high-pressure gas, thereby avoiding the waste of coal powder, thereby meeting the demand for long-term use of the spray tank, and further improving the use efficiency of the spray tank.

[0023] The bottom plate 903 is located below the flower plate 902, the upper and lower ends of the support column 904 are connected to the flower plate 902 and the bottom plate 903 respectively, a number of through holes are arranged on the side of the protective cover 5, the upper and lower ends of the protective cover 5 are connected to the flower plate 902 and the bottom plate 903 respectively, a positioning ring 905 is arranged on the top of the flower plate 902, a fixing block 901 is arranged below the bottom plate 903, a guide column 701 is arranged inside the filter element 7, a limiting ring 703 is arranged on the upper end of the filter element 7, the guide column 701 is connected to the filter element 7 through a reinforcing rib 702, the limiting ring 703 is located inside the positioning ring 905, the lower end of the guide column 701 passes through the bottom plate 903 to the inside of the fixing block 901, the guide column 701 is threadedly connected to the fixing block 901, the filter element 7 is constructed of a stainless steel sintered mesh, at least six filter elements 7 are arranged, and at least two reinforcing ribs 702 are arranged inside a single filter element 7.

[0024] When installing the filter element 7, first place the filter element 7 into the protective cover 5, and thread the lower end of the guide column 701 to the fixed block 901, then place the limit ring 703 inside the positioning ring 905, and finally fix the pressure plate 6 on the flower plate 902. The installation of the filter element 7 is completed. Compared with the traditional method of installing the filter element 7 with screws, the installation time is greatly reduced. At the same time, the protective cover 5 also reduces the impact of the airflow on the filter element 7, further extending the service life of the filter element 7.

[0025] Working principle: by arranging a mounting frame 9 inside the pressure-resistant shell 1, and arranging a filter element 7 inside the mounting frame 9, when the spray tank is released, the gas carries the coal powder through the filter element 7 and then leaves from the release pipe 201, wherein the coal powder is retained by the filter element 7 inside the pressure-resistant shell 1; when the spray tank is pressurized, the coal powder attached to the surface of the filter element 7 is brought back to the inside of the spray tank by the high-pressure gas, thereby avoiding the waste of coal powder and satisfying the demand for long-term use of the spray tank.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A pressurized discharge filter for external use in a spray tank, comprising a pressure-resistant housing (1), characterized in that: The invention also comprises a mounting frame (9), wherein the mounting frame (9) is located inside the pressure-resistant shell (1); a pressure-resistant head (2) is arranged above the pressure-resistant shell (1); a transfer pipe (4) is arranged below the pressure-resistant shell (1); an upper flange ring (101) and a lower flange ring (102) are arranged at the upper and lower ends of the pressure-resistant shell (1), respectively; a first flange ring (203) is arranged at the lower end of the pressure-resistant head (2); a second flange ring (401) is arranged at the upper end of the transfer pipe (4); the mounting frame (9) comprises a flower plate (902), a bottom plate (903) and a support column (904); a pressure plate (6) is arranged above the flower plate (902); a protective cover (5) is arranged below the flower plate (902); and a filter element (7) is arranged inside the protective cover (5).

2. The external pressurized discharge filter for a spray can according to claim 1, characterized in that: The flower plate (902) is located between the upper flange ring (101) and the first flange ring (203), a sealing ring (8) is arranged between the flower plate (902) and the upper flange ring (101), a sealing ring (8) is arranged between the flower plate (902) and the first flange ring (203), the upper flange ring (101) and the first flange ring (203) are connected by bolts (3), and the lower flange ring (102) and the second flange ring (401) are connected by bolts (3).

3. The external pressurized discharge filter for a spray can according to claim 1, characterized in that: A release pipe (201) and a pressure-charging pipe (202) are arranged above the pressure-resistant sealing head (2); the pressure-resistant sealing head (2) and the release pipe (201) are in communication; the pressure-resistant sealing head (2) and the pressure-charging pipe (202) are in communication; and the lower end of the transfer pipe (4) is connected to the spray tank.

4. The external pressurized discharge filter for a spray can according to claim 1, characterized in that: The bottom plate (903) is located below the flower plate (902), the upper end and the lower end of the support column (904) are respectively connected to the flower plate (902) and the bottom plate (903), a plurality of through holes are provided on the side of the protective cover (5), and the upper end and the lower end of the protective cover (5) are respectively connected to the flower plate (902) and the bottom plate (903).

5. The external pressurized discharge filter for a spray can according to claim 1, characterized in that: A positioning ring (905) is arranged on the top of the flower plate (902), a fixing block (901) is arranged on the bottom of the bottom plate (903), a guide column (701) is arranged inside the filter element (7), a limiting ring (703) is arranged at the upper end of the filter element (7), and the guide column (701) is connected to the filter element (7) via a reinforcing rib (702).

6. The external pressurized discharge filter for a spray can according to claim 5, characterized in that: The limiting ring (703) is located inside the positioning ring (905), the lower end of the guide column (701) passes through the bottom plate (903) to the inside of the fixed block (901), the guide column (701) is threadedly connected to the fixed block (901), the filter element (7) is constructed of a stainless steel sintered mesh, at least six filter elements (7) are provided, and at least two reinforcing ribs (702) are provided inside a single filter element (7).

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