Recovery device for low-temperature waste heat in converter flue gas

Abstract

The utility model relates to the field of waste heat recovery devices, and discloses a converter flue gas medium and low temperature waste heat recovery device which comprises a dust collecting hopper, the right end of the dust collecting hopper is fixedly connected with a collecting shell, the right end of the collecting shell is provided with a gas conveying pipe, and the inner wall of the collecting shell is provided with a separating mechanism. The separation mechanism comprises a speed reduction assembly and a filtering assembly, the filtering assembly comprises a supporting frame, the left end of the supporting frame is rotationally connected with a rotating table, the outer wall of the rotating table is fixedly connected with a wind shield, the left end of the rotating table is fixedly connected with a wind breaking block, and the right end of the supporting frame penetrates through and is slidably connected with a connecting shaft; the right end of the connecting shaft is fixedly connected with a filter plate. According to the utility model, a full-dry separation method is adopted, the separation mechanism can be utilized to decelerate the flue gas during working, so that large particles in the flue gas can automatically fall off, meanwhile, the filter plate is arranged to filter the flue gas, namely, small particles in the flue gas can be removed, and the whole device does not need to be sprayed.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery devices, and in particular to a low-temperature waste heat recovery device for converter flue gas. Background Technology

[0002] A converter is a large metallurgical equipment that emits a large amount of flue gas during operation. In order to increase energy utilization, it is usually necessary to reuse the flue gas. In existing technologies, the internal heat energy is generally recovered and utilized by a recovery device. The recovery device usually consists of multiple structures, including a filtration structure, an evaporation structure, and a circulation structure. Among them, the filtration structure is the most important part of the recovery device, as it can remove most of the particles in the flue gas, so that the flue gas can enter the interior of other devices.

[0003] In existing technologies, spraying is generally used to treat flue gas. Although this can remove particles from the flue gas, the particles are difficult to separate after mixing with the liquid, which makes subsequent processing inconvenient. At the same time, it also lowers the flue gas temperature, resulting in heat energy waste. Therefore, a low-temperature waste heat recovery device for converter flue gas is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a low-temperature waste heat recovery device for converter flue gas, which aims to improve the problem in the prior art that "using the spray method to treat flue gas will lead to difficulties in subsequent treatment and waste of heat energy".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-temperature waste heat recovery device for converter flue gas, comprising a dust collection hopper, a collection shell fixedly connected to the right end of the dust collection hopper, a gas supply pipe installed at the right end of the collection shell, a separation mechanism provided on the inner wall of the collection shell, the separation mechanism comprising a deceleration assembly and a filter assembly, the filter assembly comprising a support frame, a rotating platform rotatably connected to the left end of the support frame, a baffle plate fixedly connected to the outer wall of the rotating platform, a wind-breaking block fixedly connected to the left end of the rotating platform, a connecting shaft penetrating and slidably connected to the right end of the support frame, a filter plate fixedly connected to the right end of the connecting shaft, the filter plate sliding on the inner wall of the collection shell, and a collection assembly provided at the bottom end of the collection shell.

[0006] As a further description of the above technical solution:

[0007] The deceleration assembly includes a deceleration ring with a wavy protrusion at the right end. The deceleration ring is fixedly connected to the inner wall of the rotating platform. Two sets of deceleration rings are provided. A sliding groove is provided at the left end of the support frame, and the other set of deceleration rings is slidably connected to the inner wall of the sliding groove.

[0008] As a further description of the above technical solution:

[0009] A return spring is fixedly connected to the right end of the deceleration ring provided on the inner wall of the slide groove. The right end of the return spring is fixedly connected to the inner wall of the slide groove, and the left end of the connecting shaft is fixedly connected to the right end of the deceleration ring in this group.

[0010] As a further description of the above technical solution:

[0011] The air-breaking block is cone-shaped, and the wind baffle is inclined on the outer wall of the rotating platform.

[0012] As a further description of the above technical solution:

[0013] The collection component includes a transmission tube, the top end of which is fixedly connected to the bottom end of the collection shell, and a storage frame is fixedly connected to the bottom end of the transmission tube. A collection box is inserted into the inner wall of the storage frame.

[0014] As a further description of the above technical solution:

[0015] The top of the storage frame is slidably connected to an insert block, and the front end of the transmission tube is provided with a through groove, with the insert block inserted into the inner wall of the through groove.

[0016] As a further description of the above technical solution:

[0017] The top of the collection box is provided with a fixing groove, which is compatible with the insertion block.

[0018] As a further description of the above technical solution:

[0019] The top of the storage box is fixedly connected to a support plate, the front end of the support plate is rotatably connected to a threaded rod, the outer wall of the threaded rod is threadedly connected to a threaded plate, and the right end of the threaded plate is fixedly connected to the left end of the insert block.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by adopting a fully dry separation method, the separation mechanism can slow down the flue gas during operation, so that large particles in the flue gas will fall off on their own. At the same time, a filter plate is set to filter the flue gas, which can also remove small particles. The whole device does not require spraying, and subsequent processing is more convenient and does not lead to heat waste.

[0022] 2. In this utility model, by setting up a collection component, fallen particles can be collected. At the same time, the same switch controls the transmission tube and the collection box simultaneously. When the collection box is removed, the transmission tube is automatically closed, which can reduce the probability of misoperation. The overall device has a good foolproof effect. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0024] Figure 2 This is a three-dimensional cross-sectional view of the collecting shell in this utility model;

[0025] Figure 3 This is a three-dimensional cross-sectional diagram of the separation mechanism in this utility model.

[0026] Figure 4 This is a three-dimensional structural breakdown diagram of the collecting components in this utility model.

[0027] Legend:

[0028] 1. Dust collection hopper; 2. Collection shell; 3. Air supply pipe; 4. Collection assembly; 41. Storage frame; 42. Collection box; 43. Transmission pipe; 44. Insert block; 45. Threaded plate; 46. Support plate; 47. Threaded rod; 48. Through groove; 49. Fixing groove; 5. Separation mechanism; 51. Air breaker block; 52. Rotating table; 53. Baffle plate; 54. Deceleration ring; 55. Support frame; 56. Slide groove; 57. Return spring; 58. Connecting shaft; 59. Filter plate. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1 - Figure 3This utility model provides an embodiment of a low-temperature waste heat recovery device for converter flue gas, including a dust collection hopper 1 connected to the converter exhaust port. A collection shell 2 for temporarily storing flue gas is fixedly connected to the right end of the dust collection hopper 1. A gas delivery pipe 3 for outputting filtered flue gas is installed on the right end of the collection shell 2. A separation mechanism 5 for separating flue gas and particulate matter is provided on the inner wall of the collection shell 2. The separation mechanism 5 includes a deceleration component for reducing the rotation speed of the rotating table 52 and a filter component for filtering the flue gas. The filter component includes a support frame 55 for supporting the overall separation mechanism 5. The left end of the support frame 55 is rotatably connected to the rotating table 52, which is circular in shape. The rotating platform 52 is shaped like a platform, with its cross-section increasing uniformly from left to right. A baffle plate 53 for blocking the flue gas is fixedly connected to the outer wall of the rotating platform 52. When the high-speed flue gas comes into contact with the baffle plate 53, it will push the baffle plate 53 to rotate. The baffle plate 53 will also generate a reaction force to force the flue gas to slow down. A wind-breaking block 51 for forcing the flue gas to divert is fixedly connected to the left end of the rotating platform 52. A connecting shaft 58 for supporting the filter plate 59 is slidably connected through the right end of the support frame 55. A filter plate 59 for filtering small particles is fixedly connected to the right end of the connecting shaft 58. The filter plate 59 slides on the inner wall of the collection shell 2. A collection component 4 for collecting particles is provided at the bottom end of the collection shell 2.

[0031] Reference Figure 1 - Figure 3 The deceleration assembly includes a deceleration ring 54 for reducing the rotational speed of the rotary table 52. The right end of the deceleration ring 54 has a wavy protrusion. The deceleration ring 54 is fixedly connected to the inner wall of the rotary table 52. When the rotary table 52 rotates, the deceleration ring 54 is also driven to rotate synchronously. Two sets of deceleration rings 54 are provided. The left end of the support frame 55 has a slide groove 56 for supporting the movement of the deceleration rings 54. The other set of deceleration rings 54 is slidably connected to the inner wall of the slide groove 56. This set of deceleration rings 54 can only slide left and right within the inner wall of the slide groove 56 and cannot rotate. The right end of the deceleration ring 54 located on the inner wall of the slide groove 56 is fixedly connected to a return spring 57 for supporting this set of deceleration rings 54. The right end of the return spring 57 is fixedly connected to the inner wall of the slide groove 56, and the return spring 57 will constantly push the deceleration ring to the left. 54. When the rotating table 52 rotates, it will cause the deceleration ring 54 on the inner wall to squeeze another set of deceleration rings 54. Since the two sets of deceleration rings 54 are in contact with the convex surface, when they rotate relative to each other, the deceleration ring 54 on the right side will be forced to move to the right. However, at the same time, this set of deceleration rings 54 is supported by the return spring 57, so it will squeeze the deceleration ring 54 on the left side, making it difficult for it to rotate. In this way, the rotating table 52 can be decelerated. The left end of the connecting shaft 58 is fixedly connected to the right end of this set of deceleration rings 54. When this set of deceleration rings 54 moves left and right, it will drive the filter plate 59 to move left and right through the connecting shaft 58. In this way, the small particles remaining on the front surface of the filter plate 59 can be separated from the filter plate 59. The air-breaking block 51 is set in a cone shape, and the baffle plate 53 is set at an inclination on the outer wall of the rotating table 52.

[0032] Reference Figure 2 - Figure 4 The collection component 4 includes a transfer tube 43 for transporting particulate matter. The top end of the transfer tube 43 is fixedly connected to the bottom end of the collection shell 2. A collection frame 41 for collecting particulate matter is fixedly connected to the bottom end of the transfer tube 43. A collection box 42 for storing particulate matter is inserted into the inner wall of the collection frame 41. The collection box 42 can be removed from the inside of the collection frame 41 by moving it downwards. An insert 44 for fixing the collection box 42 is slidably connected to the top end of the collection frame 41. A through groove 48 for accommodating the insert 44 is provided at the front end of the transfer tube 43. The insert 44 is inserted into the inner wall of the through groove 48. When the insert 44 completely fills the through groove 48, the particulate matter inside the transfer tube 43 is released. The object will be blocked by the insert block 44 and will not be able to move downward into the collection box 42. The top of the collection box 42 is provided with a fixing groove 49 for accommodating the insert block 44. The fixing groove 49 and the insert block 44 are compatible. When the insert block 44 is inserted into the fixing groove 49, the collection box 42 will be fixed and will not be able to move downward. The top of the storage frame 41 is fixedly connected to a support plate 46 for supporting the threaded rod 47. The front end of the support plate 46 is rotatably connected to the threaded rod 47. The outer wall of the threaded rod 47 is threadedly connected to a threaded plate 45 for driving the insert block 44 to move. The right end of the threaded plate 45 is fixedly connected to the left end of the insert block 44. The front surface of the threaded rod 47 is provided with a hexagonal groove.

[0033] Working principle: The flue gas generated by the converter first enters the collection shell 2 through the dust collection hopper 1. At this time, the flue gas has a certain speed and temperature. After entering the collection shell 2, the air-breaking block 51 at the left end of the rotating table 52 can force the flue gas to be diverted. When the high-speed flue gas after diversion comes into contact with the baffle plate 53, due to the inclined setting of the baffle plate 53, the flue gas will push the baffle plate 53 to rotate. At the same time, the baffle plate 53 gives the flue gas a reaction force, forcing the flue gas to decelerate. After the flue gas decelerates, the large particles inside will no longer be able to follow the flue gas and will automatically fall downwards. The flue gas continues to move to the right and will come into contact with the filter plate 59. The flue gas can pass through the filter plate 59 normally, while the small particles in the flue gas will be blocked by the filter plate 59 and stay on its left surface.

[0034] The rotation of the baffle plate 53 causes the entire rotating platform 52 to rotate, and the deceleration ring 54 on the inner wall of the rotating platform 52 rotates synchronously. Because the right end of the deceleration ring 54 has a wavy protrusion, and the two sets of deceleration rings 54 are in contact with the protruding surfaces, when the rotating platform 52 rotates, it will cause the deceleration ring 54 on the inner wall to squeeze another set of deceleration rings 54 that are slidably connected in the slide groove 56 of the support frame 55. First, this set of deceleration rings 54 can only slide left and right and cannot rotate. Second, a return spring 57 is fixedly connected to its right end, and the return spring 57 will push the deceleration ring 54 to the left at all times. When the rotating platform 52 rotates, the right deceleration ring 54 is squeezed and forced to move to the right, but at the same time, it is supported by the return spring 57 and will squeeze the left deceleration ring 54, making it difficult for it to rotate. This can prevent the rotating platform 52 from losing its deceleration effect on the flue gas due to excessive rotation. In addition, when the right deceleration ring 54 vibrates left and right, it will drive the filter plate 59 to vibrate left and right synchronously, so that the small particles remaining inside the filter plate 59 can separate from the filter plate 59 and fall downward.

[0035] After being processed by the separation mechanism 5, the fallen particles enter the interior of the collection frame 41 through the transmission pipe 43 at the bottom of the collection shell 2, and then fall into the interior of the collection box 42. When the collection box 42 needs to be cleaned, the threaded rod 47 can be rotated to drive the threaded plate 45 to move backward and insert into the interior of the through groove 48. When the interior of the through groove 48 is completely filled, the front end of the insert block 44 will also completely detach from the interior of the fixing groove 49. Then the collection box 42 can be moved downward to separate it from the collection frame 41, and then the collection box 42 can be cleaned.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for recovering low-temperature waste heat from converter flue gas, comprising a dust collecting hopper (1), characterized in that: The right end of the dust collecting hopper (1) is fixedly connected with a collecting shell (2), a gas conveying pipe (3) is installed at the right end of the collecting shell (2), a separation mechanism (5) is arranged on the inner wall of the collecting shell (2), the separation mechanism (5) comprises a speed reduction assembly and a filter assembly, the filter assembly comprises a support frame (55), a rotating table (52) is rotatably connected to the left end of the support frame (55), a wind baffle (53) is fixedly connected to the outer wall of the rotating table (52), a wind breaking block (51) is fixedly connected to the left end of the rotating table (52), a connecting shaft (58) penetrates through and is slidably connected to the right end of the support frame (55), a filter plate (59) is fixedly connected to the right end of the connecting shaft (58), and the filter plate (59) slides on the inner wall of the collecting shell (2); a collecting assembly (4) is arranged at the bottom end of the collecting shell (2).

2. The converter flue gas low-temperature waste heat recovery device according to claim 1, characterized in that: The speed reduction assembly comprises a speed reduction ring (54), the right end of the speed reduction ring (54) is provided with a wave-shaped protrusion, the speed reduction ring (54) is fixedly connected to the inner wall of the rotating table (52), and two groups of speed reduction rings (54) are arranged.

3. The converter flue gas low-temperature waste heat recovery device according to claim 2, characterized in that: The right end of the speed reduction ring (54) arranged on the inner wall of the sliding groove (56) is fixedly connected with a return spring (57), the right end of the return spring (57) is fixedly connected to the inner wall of the sliding groove (56), and the left end of the connecting shaft (58) is fixedly connected to the right end of the speed reduction ring (54).

4. The converter flue gas low-temperature waste heat recovery device according to claim 1, characterized in that: The wind breaking block (51) is conical, and the wind baffle (53) is arranged obliquely on the outer wall of the rotating table (52).

5. The converter flue gas low-temperature waste heat recovery device according to claim 1, characterized in that: The collecting assembly (4) comprises a conveying pipe (43), the top end of the conveying pipe (43) is fixedly connected to the bottom end of the collecting shell (2), the bottom end of the conveying pipe (43) is fixedly connected with a receiving frame (41), and the receiving frame (41) is inserted with a collecting box (42).

6. The low-temperature waste heat recovery device in converter flue gas according to claim 5, characterized in that: The top end of the receiving frame (41) is slidably connected with a plug (44), the front end of the conveying pipe (43) is provided with a through groove (48), and the plug (44) is inserted into the inner wall of the through groove (48).

7. The converter flue gas low-temperature waste heat recovery device according to claim 6, characterized in that: The top end of the collecting box (42) is provided with a fixing groove (49), and the fixing groove (49) is matched with the plug (44).

8. The low-temperature waste heat recovery device in converter flue gas according to claim 7, characterized in that: The top end of the receiving frame (41) is fixedly connected with a support plate (46), the front end of the support plate (46) is rotatably connected with a threaded rod (47), the outer wall of the threaded rod (47) is threadedly connected with a threaded plate (45), and the right end of the threaded plate (45) is fixedly connected to the left end of the plug (44).

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