A device for shunting and detecting the edge air flow of a reaction tube

Abstract

The present invention discloses a device capable of shunting and detecting the gas flow at the edge of a reaction tube, which relates to the technical field of blast furnace ironmaking in the metallurgical industry. The present invention includes a reaction tube body and a thermocouple insertion tube. Symmetrical edge gas outlets are provided at the upper end of the reaction tube body. A rubber hose is sleeved outside the edge gas outlets. The edge gas outlets are connected to a gas component analyzer through the rubber hose. A central gas outlet is provided at the middle position between the two edge gas outlets of the reaction tube body. A funnel is provided on the central gas outlet, and the lower end of the funnel faces the central gas outlet. The thermocouple insertion tube is movably arranged inside the reaction tube body. The thermocouple protection tube and the thermocouple fixing tube are sequentially arranged on the thermocouple insertion tube from top to bottom, and a thermocouple body is fixed inside the thermocouple protection tube and the thermocouple fixing tube. The present invention has the advantages of being able to shunt and detect the gas flow at the edge of the reaction tube, analyzing the change of the gas flow at the edge of the blast furnace lump zone, and providing technical guidance for blast furnace production, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace ironmaking in the metallurgical industry, and particularly to a device capable of shunting and detecting the edge gas flow of a reaction tube. Background Technique

[0002] To study the metallurgical properties of iron ore and the reactivity of coke in the lump zone of a blast furnace, the commonly used equipment at present is a metallurgical property tester and a coke reactivity tester. Both testers require a reaction container for holding samples, usually referred to as a reaction tube. The existing reaction tube device can only detect the metallurgical properties of iron ore or the reactivity of coke, and has no function of shunting and detecting the gas flow after the reaction. In an actual blast furnace, it is a reactor with two reverse movements of the burden descending and the gas rising. Along the cross-section of the blast furnace, the gas distribution is uneven, and the edge gas flow is relatively strong. If the edge gas flow develops too much, a channel will be formed, but when the edge gas flow is pressed down, a slippage phenomenon will occur.

[0003] The uneven distribution of gas will affect the full utilization rate of gas energy, which is directly related to the levels of coke ratio, fuel ratio and the improvement of other indicators, and has an impact on the actual daily production of the blast furnace. Therefore, it is necessary to analyze and detect the edge gas flow of the blast furnace.

[0004] In summary, in order to solve the reaction behavior of the edge gas flow in the lump zone of the blast furnace, a device capable of shunting and detecting the edge gas flow of the reaction tube is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a device capable of shunting and detecting the edge gas flow of a reaction tube, which has the advantages of being able to shunt and detect the edge gas flow of the reaction tube, analyzing the change of the edge gas flow in the lump zone of the blast furnace, and providing technical guidance for blast furnace production, etc., so as to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution:

[0007] A device capable of shunting and detecting the edge gas flow of a reaction tube includes a reaction tube body and a thermocouple insertion tube. Symmetric edge gas outlets are provided at the upper end of the reaction tube body. A rubber hose is sleeved outside the edge gas outlets, and the edge gas outlets are connected to a gas composition analyzer through the rubber hose. A central gas outlet is provided at the middle position between the two edge gas outlets of the reaction tube body. A funnel is provided on the central gas outlet, and the lower end of the funnel faces the central gas outlet;

[0008] The thermocouple insertion tube is movably arranged in the reaction tube body. The thermocouple insertion tube is sequentially provided with a thermocouple protection tube and a thermocouple fixing tube from top to bottom. A thermocouple body is fixed in the thermocouple protection tube and the thermocouple fixing tube. A bracket is fixedly sleeved on the thermocouple protection tube. Sieve holes are penetrated in the bracket, and a sample is placed on the bracket.

[0009] Preferably, a base is fixed to the lower end of the reaction tube body, a sealing tube is connected to the lower end of the base, a thermocouple fixing tube is disposed through the base and the sealing tube, an external thread is provided outside the thermocouple fixing tube, an internal thread is provided in the base and the sealing tube, and the thermocouple fixing tube is movably connected to the base and the sealing tube through the external thread and the internal thread.

[0010] Preferably, a cylindrical air outlet groove is provided through the lower end of the reaction tube body at the edge air outlet, the air outlet groove is in gas communication with the edge air outlet, an edge air flow port is provided through the side of the air outlet groove close to the sample, the edge air flow ports are arranged in columns, and the edge air flow ports are in gas communication with the air outlet groove.

[0011] Preferably, a connecting tube is provided at the lower end of the thermocouple fixing tube, and the thermocouple body is fixedly connected to the connecting tube through a bolt.

[0012] Preferably, a partition is provided at the connection between the thermocouple fixing tube and the thermocouple protection tube, and the top tube of the thermocouple body penetrates through the partition and extends into the thermocouple protection tube.

[0013] Preferably, air holes are provided through the position of the thermocouple fixing tube above the external thread, and the air holes are symmetrically arranged left and right.

[0014] Preferably, an air inlet is provided through the position of the thermocouple fixing tube below the external thread, an L-shaped elbow is connected outside the air inlet, an air inlet channel is provided in the L-shaped elbow, and the air inlet is in gas communication with the air inlet channel.

[0015] Preferably, the gap between the thermocouple fixing tube and the thermocouple body forms an air inlet groove, and the air inlet groove is in gas communication with the air inlet and the air holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The device capable of shunting and detecting the edge air flow of the reaction tube can adjust the height of the reaction tube body by rotating the thermocouple fixing tube in the base and the sealing tube according to the different material surface heights of the sample until the upper end surface of the reaction tube body is closely attached to the material surface, and then the reaction tube body is placed in the blast furnace for heating reaction. During the reaction process, the edge air flow can be directly shunted into the air outlet groove through the edge air flow port, and then discharged through the edge air outlet and the rubber hose and introduced into the gas component analyzer for detection. The gas component analyzer detects the components of the edge air flow and then summarizes and statistics. According to the summary table, the next blast furnace production can be guided accordingly, improving the productivity and the utilization rate of gas energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an isometric view of the overall structure of the present invention;

[0019] Figure 2Schematic diagram of the internal structure of the reaction tube body of the present invention;

[0020] Figure 3 Exploded view of the reaction tube body and the thermocouple insertion tube of the present invention;

[0021] Figure 4 Cross-sectional view of the reaction tube body of the present invention;

[0022] Figure 5 Schematic diagram of the internal structure of the thermocouple insertion tube of the present invention.

[0023] In the figure: 1. Reaction tube body; 11. Edge gas outlet; 12. Rubber hose; 13. Funnel; 14. Base; 15. Sealing tube; 16. Internal thread; 17. Gas outlet groove; 18. Edge air flow port; 19. Central gas outlet; 2. Thermocouple insertion tube; 21. Thermocouple protection tube; 22. Thermocouple fixing tube; 23. Bracket; 24. Sieve hole; 25. L-shaped elbow; 251. Air inlet; 26. Bolt; 27. Connecting tube; 28. External thread; 29. Air outlet hole; 3. Sample; 4. Thermocouple body. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1 - Figure 2 and Figure 4 , a device for detecting the edge gas flow of a reaction tube with shunt function, comprising a reaction tube body 1 and a thermocouple insertion tube 2. The upper end of the reaction tube body 1 is symmetrically provided with edge gas outlets 11. A rubber hose 12 is sleeved outside the edge gas outlets 11. The edge gas outlets 11 are connected to a gas composition analyzer through the rubber hose 12. A central gas outlet 19 is provided at the middle position between the two edge gas outlets 11 of the reaction tube body 1. A funnel 13 is provided on the central gas outlet 19, and the lower end of the funnel 13 faces the central gas outlet 19 directly.

[0026] Specifically, the edge gas outlets 11 are provided to discharge the gas at the edge area of the reaction tube body 1 after the reaction. The edge gas is discharged through the edge gas outlets 11 and then introduced into the gas composition analyzer through the rubber hose 12 for detection. After obtaining the detection results, it is used to guide the next production. The central gas outlet 19 is provided to discharge the mixed gas after the reaction of the reaction tube body 1. The funnel 13 is provided to facilitate the addition of samples 3, such as coke and iron ore, etc., into the reaction tube body 1.

[0027] Please refer toFigure 2 , the thermocouple insertion tube 2 is movably arranged in the reaction tube body 1. The thermocouple insertion tube 2 is successively provided with a thermocouple protection tube 21 and a thermocouple fixing tube 22 from top to bottom. A thermocouple body 4 is fixed in the thermocouple protection tube 21 and the thermocouple fixing tube 22. A bracket 23 is fixedly sleeved on the thermocouple protection tube 21. Sieve holes 24 are penetrated through the bracket 23. A sample 3 is placed on the bracket 23.

[0028] Specifically, the thermocouple body 4 is arranged to measure the temperature change in the coke reaction. The bracket 23 is used for holding the reaction sample 3, such as coke and iron ore, etc. The sieve holes 24 are used for guiding the gas introduced from the lower end of the reaction tube body 1, so that the gas can contact and react with the sample 3 at the upper end.

[0029] Please refer to Figure 2 - Figure 3 , a base 14 is fixed at the lower end of the reaction tube body 1. A sealing tube 15 is connected to the lower end of the base 14. The thermocouple fixing tube 22 is penetrated through the base 14 and the sealing tube 15. An external thread 28 is arranged outside the thermocouple fixing tube 22. An internal thread 16 is arranged in the base 14 and the sealing tube 15. The thermocouple fixing tube 22 is movably connected with the base 14 and the sealing tube 15 through the external thread 28 and the internal thread 16.

[0030] Specifically, since the thermocouple fixing tube 22 is connected with the internal threads 16 of the base 14 and the sealing tube 15 through the external thread 28, when the thermocouple fixing tube 22 is rotated, the reaction tube body 1 can make a vertical translation movement on the thermocouple fixing tube 22, realizing the adjustment of the distance between the upper end surface of the reaction tube body 1 and the sample 3. The upper end surface of the reaction tube body 1 can be tightly pressed on the sample 3 to realize the gas shunt.

[0031] Please refer to Figure 5 , a cylindrical air outlet groove 17 is penetrated through the lower end of the reaction tube body 1 at the edge air outlet 11. The air outlet groove 17 is in gas communication with the edge air outlet 11. Edge air flow ports 18 are penetrated through one side of the air outlet groove 17 close to the sample 3. The edge air flow ports 18 are arranged in columns. The edge air flow ports 18 are in gas communication with the air outlet groove 17.

[0032] Specifically, after the reaction tube body 1 is tightly pressed on the sample 3, the reaction tube body 1 is placed in a blast furnace for heating. After the reaction, a large amount of gas will be generated. The edge gas enters the air outlet groove 17 through the edge air flow ports 18, and then is discharged through the edge air outlet 11 at the upper end of the air outlet groove 17. The mixed gas in the middle is discharged through the central air outlet 19 and the funnel 13, realizing the gas shunt function.

[0033] Please refer to Figure 3, a connecting pipe 27 is provided at the lower end of the thermocouple fixing pipe 22, and the thermocouple body 4 is fixedly connected to the connecting pipe 27 through a bolt 26. A partition is provided at the connection between the thermocouple fixing pipe 22 and the thermocouple protection pipe 21, and the top pipe of the thermocouple body 4 penetrates through the partition and extends into the thermocouple protection pipe 21.

[0034] Specifically, the partition is provided to isolate the measuring head of the thermocouple body 4 within the thermocouple protection pipe 21, preventing the gas in the air inlet 251 from entering and reacting with the measuring head, resulting in corrosion.

[0035] Please refer to Figure 3 and Figure 5 , the thermocouple fixing pipe 22 is provided with air outlet holes 29 penetrating through the position above the external thread 28. The air outlet holes 29 are arranged symmetrically left and right. The thermocouple fixing pipe 22 is provided with an air inlet 251 penetrating through the position below the external thread 28. An L-shaped elbow 25 is connected outside the air inlet 251. An air inlet channel is provided inside the L-shaped elbow 25. The air inlet 251 is in gas communication with the air inlet channel. The gap between the thermocouple fixing pipe 22 and the thermocouple body 4 forms an air inlet groove, and the air inlet groove is in gas communication with the air inlet 251 and the air outlet holes 29.

[0036] Specifically, when gas needs to be added, carbon dioxide required for the reaction is input into the reaction tube body 1 through the air inlet 251. The carbon dioxide will enter the air inlet 251 through the air inlet channel inside the L-shaped elbow 25, enter the air inlet groove from the air inlet 251, and then be discharged through the air outlet holes 29. The discharged carbon dioxide contacts the sample 3 through the sieve holes 24 and undergoes a coke reaction.

[0037] It should be noted that the materials of the funnel 13, the L-shaped elbow 25, and the gas outlet part are high-temperature resistant metal materials.

[0038] In summary: For this device that can shunt and detect the edge air flow of the reaction tube, according to the different material surface heights of the sample 3, by rotating the thermocouple fixing pipe 22 within the base 14 and the sealing pipe 15, the height of the reaction tube body 1 can be adjusted until the upper end surface of the reaction tube body 1 is closely attached to the material surface. Then, the reaction tube body 1 is placed in the blast furnace for heating reaction. During the reaction process, the edge air flow can be directly shunted into the air outlet groove 17 through the edge air flow port 18, and then discharged through the edge air outlet 11 and the rubber hose 12 and introduced into the gas composition analyzer for detection. The gas composition analyzer detects the composition of the edge air flow and then summarizes and statistics. According to the summary table, the next blast furnace production can be guided accordingly, improving the production rate and the utilization rate of gas energy.

[0039] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for shunting and detecting the edge air flow of a reaction tube, comprising a reaction tube body (1) and a thermocouple insertion tube (2), characterized in that: The upper end of the reaction tube body (1) is symmetrically provided with edge air outlets (11). A rubber hose (12) is sleeved outside the edge air outlets (11). The edge air outlets (11) are connected to a gas composition analyzer through the rubber hose (12). A central air outlet (19) is provided at the middle position between the two edge air outlets (11) of the reaction tube body (1). A funnel (13) is provided on the central air outlet (19), and the lower end of the funnel (13) faces the central air outlet (19) directly. The thermocouple insertion tube (2) is movably arranged in the reaction tube body (1). The thermocouple protection tube (21) and the thermocouple fixing tube (22) are successively arranged on the thermocouple insertion tube (2) from top to bottom. A thermocouple body (4) is fixed in the thermocouple protection tube (21) and the thermocouple fixing tube (22). A bracket (23) is fixedly sleeved on the thermocouple protection tube (21). Sieve holes (24) are penetrated through the bracket (23). A sample (3) is placed on the bracket (23). The lower end of the reaction tube body (1) is fixed with a base (14). A sealing tube (15) is connected to the lower end of the base (14). The thermocouple fixing tube (22) is penetrated through the base (14) and the sealing tube (15). An external thread (28) is provided outside the thermocouple fixing tube (22). An internal thread (16) is provided in the base (14) and the sealing tube (15). The thermocouple fixing tube (22) is movably connected to the base (14) and the sealing tube (15) through the external thread (28) and the internal thread (16). A cylindrical air outlet groove (17) is penetrated through the reaction tube body (1) at the lower end of the edge air outlet (11). The air outlet groove (17) is in gas communication with the edge air outlet (11). Edge air flow ports (18) are penetrated through one side of the air outlet groove (17) close to the sample (3). The edge air flow ports (18) are arranged in columns and are in gas communication with the air outlet groove (17).

2. The device for shunting and detecting the edge air flow of a reaction tube according to claim 1, characterized in that: A connecting pipe (27) is provided at the lower end of the thermocouple fixing tube (22). The thermocouple body (4) is fixedly connected to the connecting pipe (27) through a bolt (26).

3. The device for shunting and detecting the edge air flow of a reaction tube according to claim 1, characterized in that: A partition is provided at the connection between the thermocouple fixing tube (22) and the thermocouple protection tube (21). The top pipe of the thermocouple body (4) penetrates through the partition and extends into the thermocouple protection tube (21).

4. The device for shunting and detecting the edge air flow of a reaction tube according to claim 1, wherein: Air holes (29) are penetrated through the position of the thermocouple fixing tube (22) above the external thread (28). The air holes (29) are symmetrically arranged left and right.

5. The device for shunting and detecting the edge air flow of a reaction tube according to claim 1, wherein: An air inlet (251) is penetrated through the position of the thermocouple fixing tube (22) below the external thread (28). An L-shaped elbow pipe (25) is connected outside the air inlet (251). An air inlet channel is provided in the L-shaped elbow pipe (25). The air inlet (251) is in gas communication with the air inlet channel.

6. The device for shunting and detecting the edge air flow of a reaction tube according to claim 1, wherein: The gap between the thermocouple fixing tube (22) and the thermocouple body (4) forms an air inlet groove, and the air inlet groove is in gas communication with the air inlet (251) and the air holes (29).

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