Flue gas waste heat utilization mechanism of calcium carbide furnace

Abstract

The utility model discloses a calcium carbide furnace flue gas waste heat utilization mechanism, which relates to the technical field of calcium carbide furnaces and comprises a base, a heat exchange box is fixedly mounted at the top of the base, a plurality of guide plates are fixedly mounted in the heat exchange box, mounting boxes are fixedly mounted on two sides of the heat exchange box, and a driving box is fixedly mounted on one side of each mounting box. A transmission shaft and a worm are arranged in the mounting box, a reciprocating screw rod is rotatably arranged in the mounting box, and one end of the reciprocating screw rod extends into the driving box and is fixedly provided with a worm wheel. After a worm drives a worm gear and a reciprocating screw rod to rotate, a sleeve block can be driven to do reciprocating motion through threads, the sleeve block can drive a mounting head and a steel brush to do reciprocating motion front and back in a heat exchange box through a mounting plate and a sliding rod while moving, and then soot formed on the outer side of a flow guide plate can be brushed down through the steel brush; and the efficiency and the effect of follow-up heat exchange of the flue gas of the calcium carbide furnace are improved.

Description

Technical field:

[0001] The utility model relates to the technical field of calcium carbide furnaces, in particular to a mechanism for utilizing waste heat from flue gas in a calcium carbide furnace. Background technology:

[0002] Calcium carbide furnace is the main equipment for producing calcium carbide. In the calcium carbide furnace, the high temperature generated by the electric arc causes the charge to melt and react to produce calcium carbide. Since the reaction temperature is as high as over 2000℃, such a high temperature is difficult for general refractory materials to withstand. Therefore, the volume of the furnace body must be larger than the reaction space. In other words, a layer of charge should be left between the reaction zone and the furnace lining to protect the furnace lining. There are three types of calcium carbide furnaces, open calcium carbide furnaces, semi-closed calcium carbide furnaces and closed calcium carbide furnaces. The carbon monoxide produced in the open calcium carbide furnace will burn on the surface of the material. The carbon monoxide produced in the semi-closed calcium carbide furnace will partly burn on the surface of the material, and the other part will be extracted from the inside of the calcium carbide furnace. The carbon monoxide gas produced in the closed calcium carbide furnace is completely extracted from the inside of the calcium carbide furnace by the exhaust fan.

[0003] According to a flue gas heat recovery and utilization device for a closed calcium carbide furnace with application number 202221442261.5, the high-temperature flue gas generated in the calcium carbide furnace is drawn into the interior of the heat exchange box by a first exhaust fan, and the flue gas entering the heat exchange box will be blocked by multiple heat sinks on the top of the heat-conducting partition, and the flue gas can only circulate through the flow holes, which can greatly slow down the flow rate of the flue gas. When the second exhaust fan is started, external air will enter the heat exchange box through the second air inlet pipe, and the heat sink at the bottom of the heat-conducting partition will block the air to a certain extent, which can slow down the flow rate of the air. The air at the bottom of the heat-conducting partition and the flue gas on its top will exchange heat inside the heat exchange box. By providing multiple heat sinks with flow holes, the heat exchange area between the high-temperature flue gas and the air is increased, and the efficiency of the heat exchange is accelerated.

[0004] However, the above-mentioned calcium carbide furnace flue gas heat recovery and utilization device has certain shortcomings. Although the device can slow down the flow speed of the flue gas through the heat sink, the flue gas will cause ash to form on the heat sink after entering the heat exchanger, and the above-mentioned device does not have the function of cleaning the ash. If the ash is not cleaned for a long time after it is formed, the heat exchange efficiency inside the heat exchanger will be reduced. When there is too much ash and it is not cleaned, the flow holes on the heat sink will be blocked, which will also affect the normal use of the heat exchanger. For this reason, we propose a calcium carbide furnace flue gas waste heat utilization mechanism. Utility model content:

[0005] The utility model aims to provide a mechanism for utilizing waste heat from flue gas in a calcium carbide furnace to solve the deficiencies of the prior art.

[0006] The utility model is implemented by the following technical scheme: a mechanism for utilizing waste heat from flue gas of a calcium carbide furnace comprises a base, a heat exchange box is fixedly installed on the top of the base, a plurality of guide plates are fixedly installed inside the heat exchange box, mounting boxes are fixedly installed on both sides of the heat exchange box, a drive box is fixedly installed on one side of the mounting box, a reciprocating screw is rotatably installed inside the mounting box, one end of the reciprocating screw extends to the inside of the drive box and a worm gear is fixedly installed, a double-axis motor is fixedly installed in the middle of the drive box, a transmission shaft is fixedly installed on the output end of the double-axis motor, a worm is fixedly installed on the outside of the transmission shaft, the worm is meshed with the worm gear, a sleeve block is threadedly installed on the outside of the reciprocating screw, two connecting rods are fixedly installed on one side of the sleeve block, one end of the connecting rod extends to the outside of the mounting box and a mounting plate is fixedly installed, a plurality of sliding rods are fixedly installed on one side of the mounting plate, the sliding rod extends to the inside of the heat exchange box and a mounting head is fixedly installed, steel brushes are fixedly installed on both sides of the mounting head, and the steel brushes cooperate with the guide plates.

[0007] Preferably, an ash discharge slot is provided inside the base and below the heat exchanger box, a bottom box is fixedly installed at the bottom of the base and below the ash discharge slot, two electric telescopic rods are fixedly installed inside the bottom box, a sealing bottom plate is fixedly installed at the output end of the electric telescopic rod, the sealing bottom plate cooperates with the ash discharge slot and the heat exchanger box, an ash collecting box is fixedly installed on one side of the bottom box, a collecting pipe is provided on the top of the ash collecting box, one end of the collecting pipe extends to the inside of the bottom box, a negative pressure fan is provided on one side of the ash collecting box, and the input end of the negative pressure fan is connected with the inside of the ash collecting box.

[0008] Preferably, a calcium carbide furnace body is fixedly installed on the top of the base, an air intake pipe is fixedly installed on the top of the calcium carbide furnace body, an exhaust fan is fixedly installed on the top of the base and on one side of the calcium carbide furnace body, one end of the air intake pipe is fixedly connected to the input end of the exhaust fan, a smoke inlet pipe is fixedly installed on the output end of the exhaust fan, one end of the smoke inlet pipe is connected to the interior of the heat exchanger box, and a smoke exhaust pipe is fixedly installed inside one side of the heat exchanger box.

[0009] Preferably, a heat exchange cavity is provided inside the guide plate, a heat exchange inlet pipe is fixedly installed on one side of the heat exchange box, the heat exchange inlet pipe is communicated with the interior of the heat exchange cavity, a connecting concave groove is provided inside the heat exchange box, the heat exchange cavity is engaged with the connecting concave groove, a heat exchange outlet pipe is fixedly installed on one side of the heat exchange box and on the side of the heat exchange inlet pipe, the heat exchange outlet pipe is communicated with the interior of the heat exchange cavity.

[0010] Preferably, a hole cooperating with the slide rod is opened inside one side of the heat exchange box.

[0011] Preferably, a hole cooperating with the connecting rod is opened inside one side of the installation box.

[0012] Advantages of the utility model:

[0013] 1. The utility model cooperates with an installation box, a drive box, a reciprocating screw, a worm gear, a double-axis motor, a transmission shaft, a worm, a sleeve block, a connecting rod, a mounting plate, a sliding rod, a mounting head and a steel brush. After the heat exchange box completes the heat exchange of the flue gas, the double-axis motor can be turned on to drive the transmission shaft and the worm to rotate. After the worm drives the worm gear and the reciprocating screw to rotate, the sleeve block can be driven to reciprocate through the thread. When the sleeve block moves, the mounting head and the steel brush can be driven to reciprocate back and forth in the heat exchange box through the mounting plate and the sliding rod. Then, the soot formed on the outside of the guide plate can be brushed off by the steel brush, thereby improving the efficiency and effect of subsequent heat exchange of the flue gas in the calcium carbide furnace.

[0014] 2. The utility model cooperates with the ash discharge trough, the bottom box, the electric telescopic rod, the sealed bottom plate, the ash collection box, the collection pipe and the negative pressure fan. After the ash in the heat exchange box is cleaned, it is only necessary to turn on the electric telescopic rod to drive the sealed bottom plate to move down to below one end of the collection pipe in the bottom box. Finally, by turning on the negative pressure fan, negative pressure can be formed in the ash collection box, so that suction can be generated at one end of the collection pipe to suck the ash that falls on the sealed bottom plate during cleaning into the ash collection box for collection, which is convenient for subsequent cleaning and quick and easy to use. Description of the drawings:

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 The utility model is a top view of the heat exchange box Figure 1 ;

[0019] Figure 4 The utility model is a top view of the heat exchange box Figure 2 ;

[0020] Figure 5 For this utility model Figure 3 A in the enlarged view;

[0021] Figure 6For this utility model Figure 3 The enlarged view of point B in the figure;

[0022] Figure 7 For this utility model Figure 2 The enlarged view of point C in the figure;

[0023] Figure 8 For this utility model Figure 2 Enlarged view of point D in .

[0024] In the figure: 1. base; 2. calcium carbide furnace body; 3. suction pipe; 4. exhaust fan; 5. smoke inlet pipe; 6. heat exchange box; 7. guide plate; 8. mounting box; 9. drive box; 10. reciprocating screw; 11. worm gear; 12. double-axis motor; 13. transmission shaft; 14. worm; 15. sleeve block; 16. connecting rod; 17. mounting plate; 18. sliding rod; 19. mounting head; 20. steel brush; 21. ash discharge groove; 22. bottom box; 23. electric telescopic rod; 24. sealing bottom plate; 25. ash collection box; 26. collection pipe; 27. negative pressure fan; 28. smoke exhaust pipe; 29. ​​heat exchange chamber; 30. heat exchange inlet pipe; 31. connecting concave groove; 32. heat exchange outlet pipe. Specific implementation method:

[0025] 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 of 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.

[0026] See also Figures 1 to 8The utility model provides a technical solution: a mechanism for utilizing waste heat from flue gas in a calcium carbide furnace, comprising a base 1, a heat exchange box 6 is fixedly installed on the top of the base 1, and a plurality of guide plates 7 are fixedly installed inside the heat exchange box 6, wherein the guide plates 7 are arranged at equal intervals with a high and low offset so that the flue gas entering the heat exchange box 6 can be blocked and guided by the guide plates 7 and can flow in a cyclic serpentine shape, effectively prolonging the residence time of the flue gas in the heat exchange box 6 for heat exchange, thereby improving the efficiency and effect of recovering waste heat from the flue gas and reducing heat loss. Installation boxes 8 are fixedly installed on both sides of the heat exchange box 6, and a drive box 9 is fixedly installed on one side of the installation box 8. A reciprocating screw rod 10 is rotatably installed inside the installation box 8, and one end of the reciprocating screw rod 10 extends to the drive box 9 where a worm gear 11 is fixedly installed. A dual-axis motor 12 is fixedly installed in the middle of the moving box 9, a transmission shaft 13 is fixedly installed at the output end of the dual-axis motor 12, a worm 14 is fixedly installed on the outer side of the transmission shaft 13, the worm 14 is meshed with the worm wheel 11, a sleeve block 15 is threadedly installed on the outer side of the reciprocating screw 10, two connecting rods 16 are fixedly installed on one side of the sleeve block 15, one end of the connecting rod 16 extends to the outside of the mounting box 8 and is fixedly installed with a mounting plate 17, a hole matching the connecting rod 16 is opened inside one side of the mounting box 8, a plurality of sliding rods 18 are fixedly installed on one side of the mounting plate 17, the sliding rod 18 extends to the inside of the heat exchange box 6 and is fixedly installed with a mounting head 19, a hole matching the sliding rod 18 is opened inside one side of the heat exchange box 6, steel brushes 20 are fixedly installed on both sides of the mounting head 19, and the steel brush 20 matches the guide plate 7.

[0027] An ash discharge groove 21 is provided inside the base 1 and below the heat exchange box 6. A bottom box 22 is fixedly installed at the bottom of the base 1 and below the ash discharge groove 21. Two electric telescopic rods 23 are fixedly installed inside the bottom box 22. A sealing bottom plate 24 is fixedly installed at the output end of the electric telescopic rod 23. The sealing bottom plate 24 cooperates with the ash discharge groove 21 and the heat exchange box 6. An ash collecting box 25 is fixedly installed on one side of the bottom box 22. A collecting pipe 26 is provided on the top of the ash collecting box 25. One end of the collecting pipe 26 extends to the inside of the bottom box 22. A negative pressure fan 27 is provided on one side of the ash collecting box 25. The input end of the negative pressure fan 27 is connected to the inside of the ash collecting box 25, and one side of the ash collecting box 25 can be opened to clean the collected ash.

[0028] A calcium carbide furnace body 2 is fixedly installed on the top of the base 1, an air intake pipe 3 is fixedly installed on the top of the calcium carbide furnace body 2, an exhaust fan 4 is fixedly installed on the top of the base 1 and on one side of the calcium carbide furnace body 2, one end of the air intake pipe 3 is fixedly connected to the input end of the exhaust fan 4, and a smoke inlet pipe 5 is fixedly installed on the output end of the exhaust fan 4, one end of the smoke inlet pipe 5 is connected to the inside of the heat exchange box 6, and a smoke exhaust pipe 28 is fixedly installed inside one side of the heat exchange box 6.

[0029] A heat exchange cavity 29 is provided inside the guide plate 7, and a heat exchange air inlet pipe 30 is fixedly installed on one side of the heat exchange box 6, and the heat exchange air inlet pipe 30 is communicated with the interior of the heat exchange cavity 29. A connecting concave groove 31 is provided inside the heat exchange box 6, and the heat exchange cavity 29 is meshed with the connecting concave groove 31. A heat exchange air outlet pipe 32 is fixedly installed on one side of the heat exchange box 6 and located on the side of the heat exchange air inlet pipe 30, and the heat exchange air outlet pipe 32 is communicated with the interior of the heat exchange cavity 29, wherein the connecting concave groove 31 serves to connect several heat exchange cavities 29 to each other, so that the heat exchange medium can enter the heat exchange cavity 29 through the heat exchange air inlet pipe 30 and then enter several guide plates 7 in turn for heat exchange, thereby effectively improving the heat exchange effect.

[0030] In summary, when the mechanism for utilizing waste heat of flue gas from a calcium carbide furnace is used, the exhaust fan 4 is turned on to extract the flue gas generated in the calcium carbide furnace body 2 through the suction pipe 3, and then the flue gas is introduced into the heat exchange box 6 through the smoke inlet pipe 5. After the flue gas enters the heat exchange box 6, it is guided by the guide plate 7 and then flows in an up and down serpentine shape. While the flue gas flows into the heat exchange box 6, the heat exchange medium enters the heat exchange chamber 29 through the heat exchange air inlet pipe 30 and also flows in a circulating serpentine shape. Then, it can pass through the heat exchange chamber 29 to exchange heat with the flue gas flowing in the heat exchange box 6. After the heat exchange is completed, the flue gas in the heat exchange box 6 is discharged through the smoke exhaust pipe 28, and the medium after the heat exchange is completed is discharged through the heat exchange outlet pipe 32, thereby completing the utilization of the waste heat of the flue gas from the calcium carbide furnace. When it is necessary to clean the soot in the heat exchange box 6, the double-axis motor is turned on under the premise that the calcium carbide furnace body 2 is shut down. 12 drives the transmission shaft 13 and the worm 14 to rotate. The worm 14 drives the worm wheel 11 and the reciprocating screw 10 to rotate, and then drives the sleeve block 15 to move back and forth through the thread. When the sleeve block 15 moves, it can drive the mounting head 19 and the steel brush 20 to move back and forth in the heat exchange box 6 through the mounting plate 17 and the slide rod 18, and then the soot formed on the outside of the guide plate 7 can be brushed off by the steel brush 20. After the soot in the heat exchange box 6 is cleaned, it is only necessary to turn on the electric telescopic rod 23 to drive the sealing bottom plate 24 to move down to the bottom of one end of the collecting pipe 26 in the bottom box 22. Finally, by turning on the negative pressure fan 27, negative pressure can be formed in the soot collecting box 25, so that one end of the collecting pipe 26 generates suction, and the soot falling on the sealing bottom plate 24 during cleaning can be sucked into the soot collecting box 25 for collection, which is convenient for subsequent cleaning.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanism for utilizing waste heat from flue gas of a calcium carbide furnace, comprising a base (1), characterized in that: A heat exchange box (6) is fixedly mounted on the top of the base (1), a plurality of guide plates (7) are fixedly mounted inside the heat exchange box (6), mounting boxes (8) are fixedly mounted on both sides of the heat exchange box (6), a drive box (9) is fixedly mounted on one side of the mounting box (8), a reciprocating screw rod (10) is rotatably mounted inside the mounting box (8), one end of the reciprocating screw rod (10) extends to the inside of the drive box (9) where a worm gear (11) is fixedly mounted, a double-axis motor (12) is fixedly mounted in the middle of the drive box (9), a transmission shaft (13) is fixedly mounted on the output end of the double-axis motor (12), and the outer end of the transmission shaft (13) is fixedly mounted on the outer end of the transmission shaft (13). A worm (14) is fixedly installed on the side, and the worm (14) is meshed with the worm wheel (11). The outer side of the reciprocating screw (10) is threadedly installed with a sleeve block (15). Two connecting rods (16) are fixedly installed on one side of the sleeve block (15). One end of the connecting rod (16) extends to the outside of the installation box (8) and is fixedly installed with a mounting plate (17). One side of the mounting plate (17) is fixedly installed with a plurality of sliding rods (18). The sliding rods (18) extend to the inside of the heat exchange box (6) and are fixedly installed with a mounting head (19). Steel brushes (20) are fixedly installed on both sides of the mounting head (19), and the steel brushes (20) cooperate with the guide plate (7).

2. The mechanism for utilizing waste heat from flue gas of a calcium carbide furnace according to claim 1, characterized in that: An ash discharge slot (21) is provided inside the base (1) and below the heat exchange box (6); a bottom box (22) is fixedly installed at the bottom of the base (1) and below the ash discharge slot (21); two electric telescopic rods (23) are fixedly installed inside the bottom box (22); a sealing bottom plate (24) is fixedly installed at the output end of the electric telescopic rod (23); the sealing bottom plate (24) cooperates with the ash discharge slot (21) and the heat exchange box (6); an ash collection box (25) is fixedly installed on one side of the bottom box (22); a collection pipe (26) is provided on the top of the ash collection box (25); one end of the collection pipe (26) extends to the inside of the bottom box (22); a negative pressure fan (27) is provided on one side of the ash collection box (25); the input end of the negative pressure fan (27) is connected to the inside of the ash collection box (25).

3. The mechanism for utilizing waste heat from flue gas of calcium carbide furnace according to claim 1, characterized in that: A calcium carbide furnace body (2) is fixedly mounted on the top of the base (1), an air intake pipe (3) is fixedly mounted on the top of the calcium carbide furnace body (2), an exhaust fan (4) is fixedly mounted on the top of the base (1) and on one side of the calcium carbide furnace body (2), one end of the air intake pipe (3) is fixedly connected to the input end of the exhaust fan (4), a smoke inlet pipe (5) is fixedly mounted on the output end of the exhaust fan (4), one end of the smoke inlet pipe (5) is connected to the inside of a heat exchange box (6), and a smoke exhaust pipe (28) is fixedly mounted inside one side of the heat exchange box (6).

4. The mechanism for utilizing waste heat from flue gas of a calcium carbide furnace according to claim 1, characterized in that: A heat exchange cavity (29) is provided inside the guide plate (7); a heat exchange air inlet pipe (30) is fixedly installed on one side of the heat exchange box (6); the heat exchange air inlet pipe (30) is communicated with the inside of the heat exchange cavity (29); a connecting concave groove (31) is provided inside the heat exchange box (6); the heat exchange cavity (29) is meshed with the connecting concave groove (31); a heat exchange air outlet pipe (32) is fixedly installed on one side of the heat exchange box (6) and located on one side of the heat exchange air inlet pipe (30); the heat exchange air outlet pipe (32) is communicated with the inside of the heat exchange cavity (29).

5. The mechanism for utilizing waste heat from flue gas of a calcium carbide furnace according to claim 1, characterized in that: A hole cooperating with the slide rod (18) is provided inside one side of the heat exchange box (6).

6. The mechanism for utilizing waste heat from flue gas of calcium carbide furnace according to claim 1, characterized in that: A hole matching with the connecting rod (16) is provided inside one side of the installation box (8).

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