Ejector device for recovering pressure-equalized coal gas at top of blast furnace

Abstract

The utility model discloses an ejector device for blast furnace top pressure equalizing gas recovery, and belongs to the field of gas recovery, the ejector device comprises a furnace body, the top of the furnace body is fixedly connected with an ejector pipe main pipe, and the end, away from the furnace body, of the ejector pipe main pipe is fixedly connected with an ejector body; a first recovery pipe is fixedly installed on the side, away from the main injection pipe, of the ejector body, a second recovery pipe is fixedly connected to the inner wall of the first recovery pipe, and a filter is fixedly installed at the end, away from the first recovery pipe, of the second recovery pipe. Impurities contained in coal gas are filtered through a filter screen, then it can be guaranteed that the recycled coal gas does not contain the impurities, the purity is improved, three inserting blocks are inserted into the inner walls of three square grooves, then pressing blocks are pushed by means of the elastic acting force of springs, the inserting blocks can abut against the inner walls of the square grooves, and the purity of the coal gas is improved. And then the three insertion rods are inserted into the inner walls of the three insertion holes, so that the filter screen can be quickly mounted on the inner walls of the filter, and the mounting convenience is improved.

Description

Technical Field

[0001] This application relates to the field of gas recovery technology, and in particular to an ejector device for recovering gas at the top of a blast furnace. Background Technology

[0002] Blast furnaces are the main equipment in the iron and steel smelting industry. During the smelting process, a large amount of gas is released from the top of the blast furnace. These gases mainly include three types: equalization gas released when filling the blast furnace into the charging tank, raw gas discharged from the top of the blast furnace during operation, and gas released when the blast furnace is shut down.

[0003] The patent with publication number CN208378919U describes an ejector device for a blast furnace charge tank pressure equalization gas purification and recovery system. This invention addresses the problem of having to open the pressure equalization vent valve at the top of the furnace for pressure release during the existing blast furnace charge tank pressure equalization gas purification and recovery process. It includes a high-pressure clean gas main pipe, a pressure equalization gas recovery pipe, and a low-pressure clean gas main pipe connected to them. The key feature is the presence of an ejector between the high-pressure clean gas main pipe and the pressure equalization gas recovery pipe. The ejector includes an ejector main pipe and, in sequence, a thin tube, a nozzle, and a transformer pipe connected to it. The ejector main pipe is connected to the high-pressure clean gas main pipe, and the ejector transformer pipe is inserted into the pressure equalization gas recovery pipe. Its advantages include eliminating the need to open the pressure equalization vent valve at the top of the furnace for pressure release, as well as simple structure, easy operation, convenient use, safety and reliability, environmental friendliness, small footprint, low investment, and low operating costs.

[0004] When the above devices are implemented, it is not convenient to filter the gas during recovery. Since the recovered gas contains some impurities, direct recovery will cause impurities to enter the recovery device and affect the purity. Therefore, this application proposes an ejector device for blast furnace top pressure equalization gas recovery to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides an ejector device for blast furnace top pressure equalization gas recovery, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0006] To achieve the above objectives, this application adopts the following technical solution: an ejector device for recovering pressure-equalizing blast furnace top gas, comprising a furnace body, an ejector main pipe fixedly connected to the top of the furnace body, an ejector body fixedly connected to the end of the ejector main pipe away from the furnace body, a recovery pipe one fixedly installed on the side of the ejector body away from the ejector main pipe, a recovery pipe two fixedly connected to the inner wall of the recovery pipe one, a filter fixedly installed at the end of the recovery pipe two away from the recovery pipe one, an insertion hole opened in the inner wall of the filter, an insertion rod inserted into the inner wall of the insertion hole, a square groove opened in the inner wall of the insertion rod, one end of a spring fixedly connected to the inner wall of the square groove, a pressure block fixedly connected to the other end of the spring, a insertion block inserted into the inner wall of the square groove, and a filter screen fixedly installed on the outer side of the insertion block.

[0007] In a preferred embodiment, a control valve is rotatably mounted on the outer edge of the first recovery pipe, and a control valve is rotatably mounted on the outer edge of the second recovery pipe.

[0008] By adopting the above technical solution, the inner walls of recovery pipe 1 and recovery pipe 2 can be sealed sequentially using control valve 1 and control valve 2, thereby enabling single-phase gas recovery and bidirectional synchronous recovery of recovery pipe 1 and recovery pipe 2, improving the efficiency of collection.

[0009] In a preferred embodiment, the bottom of the pressure block abuts against the top of the insertion block, the insertion block is adapted to be inserted into the inner wall of the square groove, and a lifting rod is fixedly installed on the outer side of the pressure block.

[0010] By adopting the above technical solution, the elastic force of the spring and the pressure block can be used to stably abut the insert block against the inner wall of the square groove, thereby realizing the positioning and installation of the filter screen, ensuring the stability of the filter screen, and enabling it to be stably set in the inner cavity of the filter. Furthermore, the lifting rod makes it easy to pull the pressure block to slide on the inner wall of the square groove.

[0011] In a preferred embodiment, there are three insertion holes and three insertion rods, with the three insertion rods inserted into the inner walls of the three insertion holes. There are also three insertion blocks, which are arranged in a ring around the outer edge of the filter screen and inserted into the inner walls of the three square grooves.

[0012] By adopting the above technical solution, the filter screen can be stably installed in the inner cavity of the filter using three insert rods, ensuring that it will not easily detach.

[0013] In a preferred embodiment, a threaded ring is threadedly connected to the inner wall of the filter on the side away from the second recovery pipe, and an abutment pipe is fixedly installed on the outer side of the threaded ring. The side of the abutment pipe near the threaded ring abuts against the three insertion rods.

[0014] By adopting the above technical solution, the abutment tube can be used to abut the three plug rods, ensuring that the plug rods will not easily detach after being inserted into the inner wall of the socket, thus ensuring stability.

[0015] In a preferred embodiment, the filter screen is made of stainless steel.

[0016] By adopting the above technical solution, the filter screen will not be easily damaged after contact with gas, and thus will not be easily corroded, improving its durability and ensuring its service life.

[0017] In a preferred embodiment, a filter for filtering the gas is also installed at one end of the recovery pipe away from the ejector body.

[0018] By adopting the above technical solution, both recovery pipe one and recovery pipe two can use filters and the elements inside the filter cavity to filter the gas when releasing it simultaneously.

[0019] In a preferred embodiment, a pressure gauge is fixedly installed on the outer edge of the ejector tube main.

[0020] By adopting the above technical solution, the pressure inside the ejector tube main cavity can be monitored in real time using a pressure gauge. When the pressure is too high, control valve one and control valve two can be opened simultaneously to recover gas using recovery pipe one and recovery pipe two, thereby reducing the load on the furnace body and the inside cavity of the ejector tube main cavity.

[0021] The beneficial effects of this application are:

[0022] 1. This ejector device for recovering pressure-equalizing blast furnace top gas uses a filter screen to filter impurities in the gas, ensuring that the recovered gas is free of impurities and improving its purity. Three insert blocks are inserted into the inner walls of three square slots, and the spring's elastic force pushes the pressure block to abut the insert blocks against the inner walls of the square slots. Then, three rods are inserted into the inner walls of three insertion holes, allowing the filter screen to be quickly installed on the inner wall of the filter, improving installation convenience.

[0023] 2. The ejector device for blast furnace top pressure equalization gas recovery uses a pressure gauge to monitor the pressure inside the ejector tube main pipe in real time. When the pressure is too high, control valve one and control valve two can be opened simultaneously to recover gas using recovery pipe one and recovery pipe two, thereby reducing the load on the furnace body and the inside of the ejector tube main pipe. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2This is a partial structural diagram of this application;

[0026] Figure 3 This is a schematic diagram of the unfolded structure of this application;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter in this application;

[0028] Figure 5 This is a cross-sectional view and a partially enlarged structural schematic diagram of the insertion rod in this application.

[0029] The following are the labels in the diagram: 1. Furnace body; 2. Main ejector pipe; 3. Pressure gauge; 4. Ejector body; 5. Recovery pipe one; 6. Control valve one; 7. Recovery pipe two; 8. Control valve two; 9. Filter; 10. Insertion hole; 11. Insertion rod; 12. Square groove; 13. Spring; 14. Pressure block; 15. Insertion block; 16. Filter screen; 17. Lifting rod; 18. Threaded ring; 19. Abutment pipe. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] Reference Figure 1-5 An ejector device for recovering pressure-equalizing gas at the top of a blast furnace includes a furnace body 1. A main ejector pipe 2 is fixedly connected to the top of the furnace body 1. An ejector body 4 is fixedly connected to the end of the main ejector pipe 2 away from the furnace body 1. A recovery pipe 5 is fixedly installed on the side of the ejector body 4 away from the main ejector pipe 2. A second recovery pipe 7 is fixedly connected to the inner wall of the first recovery pipe 5. A filter 9 is fixedly installed at the end of the second recovery pipe 7 away from the first recovery pipe 5. An insertion hole 10 is opened in the inner wall of the filter 9. An insertion rod 11 is inserted into the inner wall of the insertion hole 10. A square groove 12 is opened in the inner wall of the insertion rod 11. One end of a spring 13 is fixedly connected to the inner wall of the square groove 12. A pressure block 14 is fixedly connected to the other end of the spring 13. An insertion block 15 is inserted into the inner wall of the square groove 12. A filter screen 16 is fixedly installed on the outer side of the insertion block 15.

[0032] See Figure 2 and Figure 3 A control valve 6 is rotatably installed on the outer edge of recovery pipe 5, and a control valve 8 is rotatably installed on the outer edge of recovery pipe 7. This allows the inner walls of recovery pipe 5 and recovery pipe 7 to be sealed sequentially by control valves 6 and 8, thereby enabling single-pair gas recovery and bidirectional synchronous recovery of recovery pipe 5 and recovery pipe 7, improving the efficiency of collection.

[0033] See Figure 5The bottom of the pressure block 14 abuts against the top of the insertion block 15. The insertion block 15 is adapted to be inserted into the inner wall of the square groove 12. A lifting rod 17 is fixedly installed on the outside of the pressure block 14, so that the elastic force of the spring 13 and the pressure block 14 can be used to stably abut against the inner wall of the square groove 12, thereby realizing the positioning and installation of the filter screen 16, ensuring the stability of the filter screen 16, and being stably set in the inner cavity of the filter 9. The lifting rod 17 makes it easy to pull the pressure block 14 to slide on the inner wall of the square groove 12.

[0034] See Figure 4 and Figure 5 There are three insertion holes 10 and three insertion rods 11. The three insertion rods 11 are inserted into the inner wall of the three insertion holes 10. There are also three insertion blocks 15. The three insertion blocks 15 are arranged in a ring on the outer edge of the filter screen 16. The three insertion blocks 15 are inserted into the inner wall of the three square grooves 12, so that the filter screen 16 can be stably installed in the inner cavity of the filter 9 using the three insertion rods 11, ensuring that it will not easily detach.

[0035] See Figure 3 A threaded ring 18 is threadedly connected to the inner wall of the filter 9 on the side away from the recovery pipe 7. An abutment tube 19 is fixedly installed on the outer side of the threaded ring 18. The side of the abutment tube 19 close to the threaded ring 18 abuts against the three insertion rods 11, so that the abutment tube 19 can be used to abut against the three insertion rods 11, ensuring that the insertion rods 11 will not easily detach after being inserted into the inner wall of the insertion hole 10, thus ensuring stability.

[0036] See Figure 5 The filter screen 16 is made of stainless steel, which prevents it from being easily damaged or corroded after contact with gas, thus improving its durability and ensuring its service life.

[0037] See Figure 1 - Figure 5 The end of the recovery pipe 5 away from the ejector body 4 is also equipped with a filter 9 for filtering the gas, so that when the recovery pipe 5 and the recovery pipe 7 release the gas simultaneously, the gas can be filtered by the filter 9 and the elements inside the filter 9.

[0038] See Figure 1 - Figure 4 A pressure gauge 3 is fixedly installed on the outer edge of the ejector tube main pipe 2, so that the pressure in the inner cavity of the ejector tube main pipe 2 can be monitored in real time by the pressure gauge 3. Then, when the pressure is too high, the control valve 6 and the control valve 8 can be opened simultaneously to recover the gas by using the recovery pipe 5 and the recovery pipe 7, thereby reducing the load on the furnace body 1 and the inner cavity of the ejector tube main pipe 2.

[0039] Working principle: When using this device, pressure gauge 3 can be used to monitor the pressure inside the ejector main pipe 2 in real time. When the pressure is too high, control valve 6 and control valve 8 can be opened simultaneously to recover gas through recovery pipe 5 and recovery pipe 7, thereby reducing the load on the furnace body 1 and the inside of the ejector main pipe 2. At the same time, during recovery, filter screen 16 can be used to filter impurities in the gas, thereby ensuring that the recovered gas does not contain impurities and improving purity. By taking the filter screen 16, the three inserts 15 are inserted into the inner wall of the three square slots 12. Then, with the elastic force of spring 13, the pressure block 14 is pushed to press the inserts 15 against the inner wall of the square slots 12. Then, the three insert rods 11 are inserted into the inner wall of the three insertion holes 10, and the filter screen 16 can be quickly installed on the inner wall of the filter 9 for filtering the gas flowing through the inner cavity of the filter 9 during recovery.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. An ejector device for recovering pressure-equalizing gas at the top of a blast furnace, comprising a furnace body (1), characterized in that, The top of the furnace body (1) is fixedly connected to the ejector tube main pipe (2). The ejector tube main pipe (2) is fixedly connected to the end away from the furnace body (1) to the ejector body (4). The ejector body (4) is fixedly installed on the side away from the ejector tube main pipe (2) to the side. The inner wall of the first recovery pipe (5) is fixedly connected to the second recovery pipe (7). The end of the second recovery pipe (7) away from the first recovery pipe (5) is fixedly installed to the side of the filter (9). The inner wall of the filter (9) is provided with an insertion hole (10). The inner wall of the insertion hole (10) is connected to an insertion rod (11). The inner wall of the insertion rod (11) is provided with a square groove (12). The inner wall of the square groove (12) is fixedly connected to one end of a spring (13). The other end of the spring (13) is fixedly connected to a pressure block (14). The inner wall of the square groove (12) is connected to an insertion block (15). The outer side of the insertion block (15) is fixedly installed with a filter screen (16).

2. The ejector device for recovering pressure-equalizing gas at the top of a blast furnace according to claim 1, characterized in that, A control valve 1 (6) is rotatably installed on the outer edge of the first recovery pipe (5), and a control valve 2 (8) is rotatably installed on the outer edge of the second recovery pipe (7).

3. The ejector device for recovering pressure-equalizing blast furnace top gas according to claim 1, characterized in that, The bottom of the pressure block (14) abuts against the top of the insertion block (15), the insertion block (15) is adapted to be inserted into the inner wall of the square groove (12), and a lifting rod (17) is fixedly installed on the outer side of the pressure block (14).

4. The ejector device for recovering pressure-equalizing gas at the top of a blast furnace according to claim 1, characterized in that, The number of the insertion holes (10) and the insertion rods (11) are both three, and the three insertion rods (11) are inserted into the inner walls of the three insertion holes (10). The number of the insertion blocks (15) is also three, and the three insertion blocks (15) are arranged in a ring on the outer edge of the filter screen (16). The three insertion blocks (15) are inserted into the inner walls of the three square grooves (12).

5. The ejector device for recovering pressure-equalizing gas at the top of a blast furnace according to claim 1, characterized in that, The filter (9) has a threaded ring (18) threaded on the inner wall of the side away from the second recovery pipe (7). The outer side of the threaded ring (18) is fixedly installed with abutment pipe (19). The side of the abutment pipe (19) close to the threaded ring (18) abuts against the three insertion rods (11).

6. The ejector device for recovering pressure-equalizing gas at the top of a blast furnace according to claim 1, characterized in that, The filter screen (16) is made of stainless steel.

7. The ejector device for recovering pressure-equalizing gas at the top of a blast furnace according to claim 1, characterized in that, The end of the recovery pipe (5) away from the ejector body (4) is also equipped with a filter (9) for filtering the gas.

8. The ejector device for recovering pressure-equalizing gas at the top of a blast furnace according to claim 1, characterized in that, A pressure gauge (3) is fixedly installed on the outer edge of the ejector tube main pipe (2).

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