Inlet flue device of desulfurizing absorption tower

Abstract

The invention discloses a desulfurization absorption tower inlet flue device, and relates to the technical field of flue gas desulfurization. Mounting columns are fixed to the two sides of the bottom of the inlet end of the flue body, a mounting frame is fixed between the tops of the mounting columns, and a movable frame is fixed to the inner walls of the mounting columns. The device further comprises a screw rod, the screw rod is arranged in a cavity in the outer side of the mounting frame in an embedded mode through a motor, the screw rod is sleeved with a movable seat in a threaded mode, the two ends of the bottom of the movable seat are connected with mounting seats through first telescopic rods arranged in a cavity in the top of the movable frame in a penetrating mode, and mounting shafts are arranged in the mounting seats in a penetrating mode. And a scraper is rotationally connected to the mounting shaft through a shaft rod, and a movable shaft is fixed to the inner end of the scraper. According to the inlet flue device of the desulfurizing absorption tower, the flue inlet is obliquely arranged and is matched with automatic scraping, so that slurry can automatically flow back to the absorption tower after overflowing to the inlet flue.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas desulfurization, in particular to an inlet flue device of a desulfurization absorption tower. Background Art

[0002] During the use of the flue gas desulfurization absorption tower, foam will be generated during the circulation of the absorption tower slurry, resulting in a high liquid level phenomenon in the absorption tower slurry and overflowing to the inlet flue. In addition, there is a slope rising toward the absorption tower side in the horizontal section of the inlet flue close to the absorption tower, which makes it impossible for the slurry to return to the absorption tower. In addition, the high liquid level condition is sporadic and random and cannot be completely avoided. At the same time, due to the large total amount of gypsum accumulation and the smaller cross-sectional area of ​​the flue, the flow velocity in this area increases, the system resistance increases, and the flow field may be adversely affected; and the flue and its supporting load-bearing capacity are too large, which may cause the flue to deform, and in severe cases there is even a risk of flue collapse.

[0003] In order to solve this problem, the inlet flue needs to be improved. However, the existing inlet flue device of the desulfurization absorption tower is not convenient for modifying the inlet flue, lacks effective means to promote the reflux of slurry at the inlet, and the overall volume of the inlet flue is large, involving many installation and support mechanisms, such as internal supports, expansion joints and GGH frames. If the changes are large, on the one hand, it will affect the stability of the inlet flue, and on the other hand, the improvement cost will be large, which is not conducive to reducing costs and increasing efficiency. Summary of the invention

[0004] The object of the present invention is to provide an inlet flue device for a desulfurization absorber to solve the problem that the inlet flue device for a desulfurization absorber proposed in the above background technology is not convenient for modifying the inlet flue and lacks effective means to promote the reflux of slurry at the inlet. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single and provides a solution that is significantly different from the existing technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a flue device at the inlet of a desulfurization absorption tower, comprising a flue body, mounting columns are fixed on both sides of the bottom of the inlet end of the flue body, mounting frames are fixed between the tops of the mounting columns, and a movable frame is fixed on the inner wall of the mounting columns; It also includes a screw rod, which is embedded in the outer cavity of the mounting frame through a motor, and a movable seat is threadedly sleeved on the screw rod. The bottom ends of the movable seat are connected to the mounting seat through a first telescopic rod that passes through the top cavity of the movable frame. A mounting shaft is passed through the mounting seat, and a rotating component and a telescopic component are provided at the rear end of the mounting shaft. A scraper is rotatably connected to the mounting shaft through the shaft rod, and a movable shaft is fixed to the inner end of the scraper. The movable shaft slides within the cavity opened on the mounting shaft. The gear sleeve is fixedly mounted in the middle of the mounting shaft, a second telescopic rod is fixed to the outer side of the gear sleeve, an outer end of the second telescopic rod is slidably mounted on the movable shaft, and a one-way transmission mechanism is arranged at the bottom of the gear sleeve, and the one-way transmission mechanism is used to drive the gear sleeve to rotate in one direction.

[0006] Preferably, the movable frame is designed as an arc-shaped structure, and the curvature of the movable frame is consistent with the curvature of the inlet end of the flue body, and the inlet end of the flue body is tilted downward.

[0007] Preferably, the protrusion of the movable seat slides in the outer cavity of the mounting frame through a screw rod, and the threads at both ends of the screw rod have opposite directions to drive the two movable seats to move towards each other.

[0008] Preferably, the rotating assembly includes a gear, which is installed on the inner end of the mounting seat through a bearing, and the gear sleeve is arranged on the inner end of the mounting shaft. A limiting rod is fixed on the outer side of the mounting shaft, and the limiting rod slides in a limited position in the cavity of the inner wall of the gear. A rack is meshed at the bottom of the gear, and the rack is fixed to the bottom surface of the movable frame.

[0009] Preferably, the telescopic assembly includes a first protrusion, the first protrusion is fixed to the inner end of the mounting shaft, a spring is installed between the first protrusion and the gear, a second protrusion is arranged on the movable track of the first protrusion, and the second protrusion is fixed to the inner wall of the movable frame.

[0010] Preferably, the first protrusion and the second protrusion are both designed as hemispherical structures, and the second protrusions are distributed at equal intervals on the movable frame.

[0011] Preferably, the scrapers are distributed at equal angles on the mounting shaft, the scrapers and the gear sleeves are located on the outside of the movable frame, the scrapers are inclined on the mounting shaft, and the mounting shaft is parallel to the inclined portion of the flue body inlet.

[0012] Preferably, the one-way transmission mechanism comprises a transmission bar, the transmission bar is fixed on the outside of the movable frame, a mounting groove is formed on the top of the transmission bar, and a transmission tooth is rotatably mounted in the mounting groove through a torsion spring.

[0013] Preferably, the transmission tooth rotates unidirectionally in the installation groove, the transmission tooth is meshed with the gear sleeve, and transmission bars are provided at both ends of the movable track at the bottom of each gear sleeve, and the unidirectional rotation directions of the transmission teeth on the two transmission bars are opposite.

[0014] Preferably, the inlet of the flue body is connected to the absorption tower body, and an induced draft fan is installed at the outlet of the flue body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the process of modifying the inlet flue, the elevation of the flue inlet is raised by 1.1m compared with the original one, so that the inlet section is inclined toward the absorption tower, so that the slurry can be guided, and the reciprocating movement of the mounting seat drives the mounting shaft to reciprocate. On this basis, the mounting shaft cooperates with the rotating assembly and the telescopic assembly to rotate and telescope, and the rotating and longitudinally movable scraper scrapes the slurry at the flue inlet, thereby improving the slurry reflux efficiency, effectively avoiding gypsum accumulation, and improving the flue gas circulation effect; 2. In the present invention, the scraper is inclined so that the efficiency of scraping and pushing the slurry is improved through the inclined surface of the scraper during the rotation and telescopic activities. At the same time, when the installation shaft drives the scraper to reciprocate, the inclination direction of the scraper can be changed through the one-way transmission mechanism, that is, the scraper can push the slurry back during the reciprocating activity of the installation shaft. On the one hand, based on the timeliness of the reciprocating scraping, it is helpful to carry out continuous scraping and avoid slurry accumulation. On the other hand, by changing the angle of the scraper to adapt to the law of its reciprocating scraping, the slurry can be prevented from being scraped into the flue. Through the rotation and telescopic activities of the installation sleeve and the alternating inclination direction of the scraper, the slurry can be scraped continuously, effectively avoiding the formation of gypsum and increasing the service life of the flue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation structure of the flue body of the present invention from a top view; Figure 2 This is a schematic diagram of the front installation structure of the flue body of the present invention; Figure 3 This is a schematic diagram of the installation structure of the mounting frame and the movable frame of the present invention at the entrance of the flue body; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of the internal structure of the movable frame of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 7 It is a structural schematic diagram of the one-way transmission mechanism of the present invention.

[0017] In the figure: 1. flue body; 2. mounting column; 21. mounting frame; 22. movable frame; 3. screw rod; 4. movable seat; 5. first telescopic rod; 6. mounting seat; 7. mounting shaft; 71. gear; 72. limit rod; 73. rack; 81. first protrusion; 82. spring; 83. second protrusion; 9. scraper; 10. movable shaft; 11. gear sleeve; 12. second telescopic rod; 131. transmission bar; 132. mounting groove; 133. transmission gear; 14. absorption tower body; 15. induced draft fan. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 7 The present invention provides a technical solution: a flue device at the inlet of a desulfurization absorption tower, a flue body 1, a mounting column 2, a mounting frame 21, a movable frame 22, a screw 3, a movable seat 4, a first telescopic rod 5, a mounting seat 6, a mounting shaft 7, a gear 71, a limit rod 72, a rack 73, a first protrusion 81, a spring 82, a second protrusion 83, a scraper 9, a movable shaft 10, a gear sleeve 11, a second telescopic rod 12, a one-way transmission mechanism, a transmission bar 131, a mounting groove 132, a transmission tooth 133, an absorption tower body 14 and an induced draft fan 15.

[0020] Embodiment 1 See also Figure 1-Figure 4 In the embodiment, mounting columns 2 are fixed on both sides of the bottom of the inlet end of the flue body 1, a mounting frame 21 is fixed between the tops of the mounting columns 2, and a movable frame 22 is fixed on the inner wall of the mounting columns 2; the inlet of the flue body 1 is connected to the absorption tower body 14, and an induced draft fan 15 is installed at the outlet of the flue body 1; the screw rod 3 is embedded in the outer cavity of the mounting frame 21 through the motor, and a movable seat 4 is threadedly sleeved on the screw rod 3, and the bottom ends of the movable seat 4 are connected to the mounting seat 6 through the first telescopic rod 5 that penetrates the top cavity of the movable frame 22, and a through-type axial extension rod 5 is provided in the mounting seat 6. There is a mounting shaft 7, the rear end of which is provided with a rotating assembly and a telescopic assembly, a scraper 9 is rotatably connected to the mounting shaft 7 through a shaft rod, a movable shaft 10 is fixed to the inner end of the scraper 9, and the movable shaft 10 slides within a limited position in a cavity provided on the mounting shaft 7; the movable frame 22 is designed as an arc structure, and the arc of the movable frame 22 is consistent with the arc of the inlet end of the flue body 1, and the inlet end of the flue body 1 is tilted downward; the raised part of the movable seat 4 slides in the outer cavity of the mounting frame 21 through the screw 3, and the threads at both ends of the screw 3 have opposite directions, driving the two movable seats 4 to move in opposite directions; The inlet end of the flue body 1 is inclined so as to guide the overflowing slurry, and the scraper 9 is used to scrape the slurry in coordination with the movement of the mounting shaft 7, thereby avoiding the adhesion of the slurry and improving the slurry reflux effect. The rotating assembly includes a gear 71, which is mounted on the inner end of the mounting seat 6 through a bearing. The gear 71 is sleeved on the inner end of the mounting shaft 7. A limiting rod 72 is fixed to the outer side of the mounting shaft 7. The limiting rod 72 slides within the cavity of the inner wall of the gear 71. A rack 73 is meshed at the bottom of the gear 71, and the rack 73 is fixed to the bottom surface of the movable frame 22. When the mounting seat 6 moves back and forth, the mounting shaft 7 and the scraper 9 can be driven to rotate synchronously through the meshing of the gear 71 and the rack 73, thereby further improving the scraping effect of the slurry. The telescopic assembly includes a first convex head 81, which is fixed to the inner end of the mounting shaft 7, a spring 82 is installed between the first convex head 81 and the gear 71, a second convex head 83 is arranged on the moving track of the first convex head 81, and the second convex head 83 is fixed to the inner wall of the movable frame 22; the first convex head 81 and the second convex head 83 are both designed as hemispherical structures, and the second convex heads 83 are evenly spaced on the movable frame 22; When the mounting seat 6 moves back and forth, the first protrusion 81 intermittently contacts the second protrusion 83 , and cooperates with the spring 82 to make the mounting shaft 7 reciprocate longitudinally, and cooperates with the scraper 9 to push the slurry.

[0021] Embodiment 2 Based on Example 1, please refer to Figure 1-Figure 7 In the embodiment, the gear sleeve 11 is fixedly sleeved in the middle of the mounting shaft 7, a second telescopic rod 12 is fixed to the outer side of the gear sleeve 11, the outer end of the second telescopic rod 12 is slidably sleeved on the movable shaft 10, and a one-way transmission mechanism is arranged at the bottom of the gear sleeve 11, and the one-way transmission mechanism is used to drive the gear sleeve 11 to rotate in one direction; the scrapers 9 are distributed at equal angles on the mounting shaft 7, the scrapers 9 and the gear sleeve 11 are located on the outer side of the movable frame 22, the scrapers 9 are inclined on the mounting shaft 7, and the mounting shaft 7 is parallel to the inlet inclination of the flue body 1 The one-way transmission mechanism includes a transmission bar 131, which is fixed to the outer side of the movable frame 22. A mounting groove 132 is provided on the top of the transmission bar 131. A transmission tooth 133 is installed in the mounting groove 132 through a torsion spring. The transmission tooth 133 rotates unidirectionally in the mounting groove 132. The transmission tooth 133 meshes with the gear sleeve 11. Both ends of the movable track at the bottom of each gear sleeve 11 are provided with transmission bars 131. The unidirectional rotation directions of the transmission teeth 133 on the two transmission bars 131 are opposite. The mounting shaft 7 can move laterally, rotate and reciprocate, and can efficiently scrape the slurry at the bottom of the flue body 1 inlet through the inclined scraper 9, and cooperate with the one-way transmission mechanism to change the inclined direction of the scraper 9, so that it can achieve a continuous scraping effect.

[0022] Working principle: When the desulfurization absorption tower inlet flue device is used, the motor first drives the screw 3 to rotate in the mounting frame 21, driving the two movable seats 4 to move back and forth in opposite directions. The movable seat 4 drives the mounting seat 6 to move back and forth in the movable frame 22 through the first telescopic rod 5, and the mounting seat 6 moves in an arc track in the movable frame 22 under the guidance of the arc-shaped structure movable frame 22. At the same time, the top opening of the movable frame 22 limits the longitudinal position of the first telescopic rod 5, and the mounting seat 6 drives the gear 71 to move, and the gear 71 and the rack 73 is meshed and can rotate. Under the action of the limit rod 72, the gear 71 drives the installation shaft 7 to move and rotate synchronously during the movement and rotation process. The scraper 9 on the installation shaft 7 contacts the bottom of the inclined flue body 1 entrance to scrape off the slurry thereon. At the same time, when the gear 71 moves, the first convex head 81 and the second convex head 83 are intermittently contacted. The spring 82 can make the installation shaft 7 move longitudinally synchronously, which has a pushing effect on the slurry. In combination with the inclined setting of the flue body 1 entrance, the overflowing slurry is scraped into the absorption tower body 14 in time. In order to further improve the slurry reflux efficiency, the initial position of the scraper 9 is set to an inclined direction, so that when the scraper 9 rotates following the installation shaft 7, its inclined structure can be used to cooperate with the longitudinal telescopic activity of the installation shaft 7 to better push the slurry into the absorption tower body 14. When the installation shaft 7 moves to the middle position of the movable frame 22 following the installation seat 6, the bottom of the gear sleeve 11 is engaged with the transmission gear 133. At this time, the transmission gear 133 will not rotate in the installation groove 132, and can drive the gear sleeve 11 to rotate. The gear sleeve 11 cooperates with the second telescopic rod 1 2 and its sliding on the movable shaft 10, the rotation of the tooth sleeve 11 drives the inner end of the scraper 9 to deflect, and the direction of the scraper 9 on the installation shaft 7 is changed, so that when the installation shaft 7 is reset, the inclined direction of the scraper 9 can still push the slurry into the absorption tower body 14, and when the installation shaft 7 moves to the external position of the installation frame 21, the bottom of the tooth sleeve 11 is again engaged with the transmission tooth 133 below it, driving the scraper 9 to reset, and according to the moving direction of the installation shaft 7, the inclined direction of the scraper 9 is changed, so that the slurry can be pushed more timely.

[0023] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 flue device at the inlet of a desulfurization absorption tower, comprising a flue body (1), mounting columns (2) being fixed on both sides of the bottom of the inlet end of the flue body (1), a mounting frame (21) being fixed between the tops of the mounting columns (2), and a movable frame (22) being fixed on the inner wall of the mounting columns (2); Features: It also comprises a screw rod (3), the screw rod (3) being embedded in a cavity outside a mounting frame (21) through a motor, a movable seat (4) being threadedly sleeved on the screw rod (3), the bottom ends of the movable seat (4) being connected to a mounting frame (6) through a first telescopic rod (5) penetrating a cavity at the top of the movable frame (22), a mounting shaft (7) being penetratingly arranged in the mounting frame (6), a rotating assembly and a telescopic assembly being arranged at the rear end of the mounting shaft (7), a scraper (9) being rotatably connected to the mounting shaft (7) through a shaft rod, a movable shaft (10) being fixed at the inner end of the scraper (9), and the movable shaft (10) slidingly limited in a cavity provided on the mounting shaft (7); A gear sleeve (11), the gear sleeve (11) is fixedly sleeved on the middle part of the mounting shaft (7), a second telescopic rod (12) is fixedly disposed on the outer side of the gear sleeve (11), the outer end of the second telescopic rod (12) is slidably sleeved on the movable shaft (10), and a one-way transmission mechanism is disposed at the bottom of the gear sleeve (11), the one-way transmission mechanism is used to drive the gear sleeve (11) to rotate in one direction.

2. A desulfurization absorption tower inlet flue device according to claim 1, characterized in that: The movable frame (22) is designed as an arc-shaped structure, and the arc of the movable frame (22) is consistent with the arc of the inlet end of the flue body (1), and the inlet end of the flue body (1) is arranged to be inclined downward.

3. A desulfurization absorption tower inlet flue device according to claim 1, characterized in that: The protrusion of the movable seat (4) slides in close contact in the outer cavity of the mounting frame (21) via the screw rod (3), and the threads at both ends of the screw rod (3) are in opposite directions to drive the two movable seats (4) to move in opposite directions.

4. A desulfurization absorption tower inlet flue device according to claim 1, characterized in that: The rotating assembly comprises a gear (71), the gear (71) being mounted on the inner end of the mounting seat (6) via a bearing, the gear (71) being sleeved on the inner end of the mounting shaft (7), a limiting rod (72) being fixed on the outer side of the mounting shaft (7), the limiting rod (72) sliding in a limited position in a cavity on the inner wall of the gear (71), a rack (73) being meshed at the bottom of the gear (71), and the rack (73) being fixed to the bottom surface of the movable frame (22).

5. The inlet flue device of a desulfurization absorption tower according to claim 1, characterized in that: The telescopic assembly comprises a first protrusion (81), the first protrusion (81) being fixed to the inner end of the mounting shaft (7), a spring (82) being installed between the first protrusion (81) and the gear (71), a second protrusion (83) being arranged on the movable track of the first protrusion (81), and the second protrusion (83) being fixed to the inner wall of the movable frame (22).

6. A desulfurization absorption tower inlet flue device according to claim 5, characterized in that: The first protrusion (81) and the second protrusion (83) are both designed as hemispherical structures, and the second protrusions (83) are distributed at equal intervals on the movable frame (22).

7. The inlet flue device of a desulfurization absorption tower according to claim 1, characterized in that: The scrapers (9) are distributed at equal angles on the mounting shaft (7); the scrapers (9) and the gear sleeves (11) are located outside the movable frame (22); the scrapers (9) are arranged obliquely on the mounting shaft (7); and the mounting shaft (7) is parallel to the inlet oblique portion of the flue body (1).

8. The inlet flue device of a desulfurization absorption tower according to claim 1, characterized in that: The one-way transmission mechanism comprises a transmission bar (131), the transmission bar (131) is fixed on the outside of the movable frame (22), a mounting groove (132) is provided on the top of the transmission bar (131), and a transmission tooth (133) is rotatably mounted in the mounting groove (132) via a torsion spring.

9. A desulfurization absorption tower inlet flue device according to claim 8, characterized in that: The transmission teeth (133) rotate unidirectionally in the mounting groove (132), and the transmission teeth (133) mesh with the gear sleeve (11). Transmission bars (131) are provided at both ends of the bottom movable track of each gear sleeve (11), and the transmission teeth (133) on the two transmission bars (131) rotate unidirectionally in opposite directions.

10. The inlet flue device of a desulfurization absorption tower according to claim 1, characterized in that: The inlet of the flue body (1) is connected to the absorption tower body (14), and an induced draft fan (15) is installed at the outlet of the flue body (1).

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