Lime kiln tail gas filtering device
By adopting a conical reaction tube and atomizing nozzle structure in the lime kiln tail gas filtration device, the problem of low purification efficiency caused by large droplets in the spray equipment is solved, achieving efficient tail gas purification and solid-gas separation, which is suitable for areas with strict environmental protection requirements.
Patent Information
- Application Number
- CN202423046969.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In existing technologies for treating lime kiln exhaust gas, the spray equipment produces large droplets, resulting in insufficient bonding between the exhaust gas and the droplets, low purification efficiency, and inability to meet environmental protection requirements. Furthermore, the low-cost spray towers cannot effectively filter dust and harmful gases in the lime kiln exhaust gas.
The device employs a conical reaction tube combined with an atomizing nozzle structure. A drive mechanism moves the atomizing nozzle up and down inside the reaction tube, increasing the contact area and time between the liquid and the exhaust gas. It also utilizes the principle of a cyclone dust collector for solid-gas separation and combines this with internal wall flushing to improve the purification effect.
It achieves efficient interception and purification of solid impurities in exhaust gas, improves purification efficiency, and reduces equipment costs, making it suitable for areas with strict environmental protection requirements.
Smart Images
Figure CN223586826U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to tail gas filter device technical field especially relates to a lime kiln tail gas filter device. BACKGROUND
[0002] With the development of the construction industry, the demand of lime product is higher and higher, in the production process of lime, need to utilize lime kiln to calcine limestone, lime kiln in the production in the kiln tail emits a lot of sulfur dioxide and lime dust with tail gas, will cause air pollution, to human health and plant growth great harm.
[0003] The prior art device in the process of treating lime kiln tail gas often adopts the form of spray tower to remove dust and harmful gases contained in the tail gas. The prior art device often includes a tower type reaction tank for reaction, the tail gas is filled into the reaction tank from the upper end of the reaction tank, and the tail gas is purified by the corresponding spraying equipment arranged above the reaction tank during the falling process of the tail gas.
[0004] However, in the actual use process, we find that the liquid droplets sprayed by the spraying equipment are large in the prior art device in the actual use process, so even if the spraying angle of the spraying equipment is improved as much as possible to make it spray downward, the combination between the tail gas and the liquid droplets still cannot be completely realized, which makes some areas with strict environmental protection inspection unable to use the spray tower for tail gas treatment.
[0005] In practice, the spray tower has low requirements on the external environment and low manufacturing cost. Therefore, we believe that a lime kiln tail gas filter device that is as low-cost as the traditional spray tower and can improve the purification efficiency of the tail gas is needed. SUMMARY
[0006] In view of the deficiencies in the prior art, the utility model provides a lime kiln tail gas filter device, which has the advantages of low cost and ensures the tail gas filtration effect of the lime kiln, solves the problem that the traditional spray tower in the prior art device cannot completely filter the impurities and harmful gases in the tail gas of the lime kiln.
[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0008] The utility model provides a lime kiln tail gas filtering device, including the sedimentation tank, the sedimentation tank one side is connected with the water outlet hose, the sedimentation tank upper end is connected with the inlet pipe, still include the up and down axial connecting pipe, the connecting pipe one side is connected with the left and right axial inlet pipe, the central axis of inlet pipe and the central axis of connecting pipe are not in the same vertical plane, the connecting pipe lower end coaxially sealed fixed connection has the reaction tube, the reaction tube is the conical body, and, the reaction tube lower end inner diameter is less than the reaction tube upper end inner diameter, and the reaction tube lower end is communicated with the inlet pipe, the reaction tube upper end opening is provided with the water storage ring, and the water storage ring side end surrounds the central axis and is provided with a plurality of atomizing nozzles in parallel equidistance, and every atomizing nozzle water outlet is towards the reaction tube inner wall, and every atomizing nozzle water inlet is communicated with the water storage ring through the connecting hose, the water storage ring upper end is provided with the drive mechanism, and the drive mechanism includes the drive motor, and the water storage ring is moved up and down linearly through the drive mechanism, the connecting pipe upper end is coaxially sealed fixed connection has the exhaust pipe, and the exhaust pipe lower end is fixedly connected with the positioning piece, and the positioning piece is rotatably connected with a plurality of atomizing nozzles.
[0009] Preferably, the water storage ring upper end is connected with the follow-up pipe, the follow-up pipe upper end is communicated with the water outlet hose, and the follow-up pipe upper end is fixedly connected with the driven slide rail, the driven slide rail is inserted into the follow-up rod, and the follow-up rod is eccentrically fixedly connected with the output shaft of the drive motor.
[0010] Preferably, the follow-up rod front and back ends are eccentrically fixedly connected with one positioning rod respectively, and the two positioning rods are rotatably connected with the exhaust pipe, and the positioning rod close to the drive motor is coaxially fixedly connected with the output shaft of the drive motor.
[0011] Preferably, the follow-up rod front and back ends are eccentrically fixedly connected with one positioning rod respectively, and the two positioning rods are rotatably connected with the exhaust pipe, and the positioning rod close to the drive motor is coaxially fixedly connected with the output shaft of the drive motor.
[0012] Preferably, the water storage ring inner diameter is greater than the reaction tube lower end inner diameter, and the exhaust pipe inner diameter is greater than the water storage ring inner diameter, and the included angle between the reaction tube side wall and the horizontal plane is greater than 10 ° and less than 30 °.
[0013] Compared with the prior art, the utility model has the beneficial effects that:
[0014] The utility model discloses a atomizing nozzle replaces the traditional spraying structure, and this can make the combination between liquid and tail gas more sufficient, and further improve the purification effect.Meanwhile, through the up and down movement of the water storage ring, the atomizing nozzle can swing up and down synchronously, which can make the coverage range of the atomizing nozzle wider, thereby further improving the contact area between the liquid and the tail gas.
[0015] The utility model discloses a reaction tube simulation cyclone dust collector with conical body structure, and liquid sprayed on the inner wall of the reaction tube by the atomizing nozzle can not only prolong the contact time between the liquid and the tail gas, but also increase the interception effect of solid impurities in the tail gas. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the whole structure schematic diagram of the utility model.
[0017] Figure 2 It is the position relation schematic diagram of the water storage ring and the reaction tube of the utility model.
[0018] Figure 3 It is the position relation schematic diagram of the positioning member and the follower pipe of the utility model.
[0019] Figure 4 It is the whole structure schematic diagram of the driving mechanism of the utility model.
[0020] Figure 5 It is the connection schematic diagram of the atomizing nozzle and the water storage ring of the utility model.
[0021] Figure 6 It is the connection schematic diagram of the atomizing nozzle and the driven rod of the utility model.
[0022] Figure 7 It is the connection schematic diagram of the positioning member and the fixed slide rail of the utility model.
[0023] In the drawing: 1, driving mechanism;101, driving motor;102, positioning rod;103, follower rod;2, connecting pipe;3, air inlet pipe;4, water outlet hose;5, reaction tube;6, sediment tank;7, exhaust pipe;8, follower pipe;9, positioning member;10, atomizing nozzle;11, driven slide rail;12, water storage ring;13, driven rod;14, fixed slide rail;15, connecting hose. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0025] In the description of the utility model, it needs to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.
[0026] Please refer to Figures 1-7 A lime kiln tail gas filtering device consistent with prior art devices, including a sediment tank 6, when the exhaust gas discharged from the lime kiln is sprayed and dusted, and after the reaction, the sewage generated is introduced into the sediment tank 6, and the dust in the original exhaust gas is precipitated in the sediment tank 6, and then the relatively clean spray liquid participates in the spray dusting process again.
[0027] Therefore, it needs to be noted that in practice, the sediment tank 6 is internally provided with corresponding liquid circulating equipment and corresponding removal equipment for dust removal, and such related equipment is not related to the technical solutions involved in the present application, so it is not described in detail here.
[0028] At the same time, the device is connected with a water outlet hose 4 on one side of the sediment tank 6, and the water outlet hose 4 should be connected with the corresponding liquid circulating equipment, which can realize the recycling of the liquid after sedimentation to participate in the dust removal process.
[0029] In addition, the device is also connected with a water inlet pipe on the upper side of the sediment tank 6 to accommodate the sewage after completing the dust removal work.
[0030] As Figure 1 , Figure 2 As shown, unlike prior art devices, the device is provided with an upper and lower axial connecting pipe 2 on the upper end of the sediment tank 6, the connecting pipe 2 is connected with a left and right axial gas inlet pipe 3 on one side, the center axis of the gas inlet pipe 3 and the center axis of the connecting pipe 2 are not in the same vertical plane, and the lower end of the connecting pipe 2 is coaxially and sealingly fixedly connected with a reaction pipe 5, the reaction pipe 5 is a conical body, at this time, only the inner diameter of the lower end of the reaction pipe 5 is smaller than the inner diameter of the upper end of the reaction pipe 5, then the connecting pipe 2 and the reaction pipe 5 can form a cyclone dust collector in the case of communication between the lower end of the reaction pipe 5 and the gas inlet pipe 3.
[0031] Therefore, in practice, the exhaust gas discharged from the lime kiln enters the connecting pipe 2 through the gas inlet pipe 3, and then enters the inside of the reaction pipe 5, and the movement trajectory of the exhaust gas in the reaction pipe 5 presents a spiral downward state, at this time, the exhaust gas rubs against the inner wall of the reaction pipe 5, and cooperates with the shape and structural characteristics of the reaction pipe 5, so that the preliminary solid-gas separation can be completed, and the solid impurities in the exhaust gas can be directly dropped into the sediment tank 6.
[0032] Further, the device is provided with a water storage ring 12 in the opening at the upper end of the reaction tube 5, and a plurality of atomizing nozzles 10 are arranged equidistantly around the central axis of the water storage ring 12. At this time, by connecting the water outlet hose 4 with the water storage ring 12, and directing the water outlet of the atomizing nozzle 10 towards the inner wall of the reaction tube 5, when the water inlet of the atomizing nozzle 10 is connected with the water storage ring 12 through the connecting hose 15, the liquid transported to the inside of the water storage ring 12 through the water outlet hose 4 can be sprayed into the reaction tube 5 by the spiral downward airflow of the atomizing nozzle 10, so as to further remove dust and achieve the reaction and impurity removal process.
[0033] It should be noted that in actual use, the liquid sprayed by the atomizing nozzle 10 can combine with the solid matter in the tail gas, which can strengthen the connection between the solid matters, so that the small solid matters can combine with each other to increase their weight, thereby making it easier to complete the solid-gas separation in the cyclone dust collector.
[0034] In addition, the liquid sprayed by the atomizing nozzle 10 can also wash the inner wall of the reaction tube 5, which can avoid the accumulation of solid dust on the inner wall of the reaction tube 5 and affect the continuous operation of the device.
[0035] At the same time, the liquid sprayed by the atomizing nozzle 10 impacts on the inner wall of the reaction tube 5, and a part of the liquid will inevitably remain on the inner wall of the reaction tube 5. In addition, the liquid remaining on the inner wall of the reaction tube 5 is constantly updated due to continuous flushing. Therefore, in actual use, the tail gas blown out of the lime kiln can fully combine with the liquid sprayed by the atomizing nozzle 10 to achieve the reaction and impurity removal process.
[0036] It should be noted that in actual use, although the number of atomizing nozzles 10 is multiple and arranged around the central axis of the water storage ring 12, there is a certain gap between the radiation ranges of adjacent atomizing nozzles 10. However, the tail gas in the reaction tube 5 spirals downward, which can ensure that the airflow can combine with the liquid sprayed by the atomizing nozzle 10 by utilizing the sequential nature of the airflow flow process.
[0037] Further, in order to prolong the combination time of the airflow and the liquid and fully achieve the reaction and impurity removal, the device is provided with a corresponding driving mechanism 1 on the water storage ring 12, which can make the water storage ring 12 move up and down linearly.
[0038] At this time, the exhaust pipe 7 arranged at the upper end of the connecting pipe 2 is fixedly connected with the positioning member 9 at the lower end of the exhaust pipe 7, and the positioning member 9 is rotationally connected with the plurality of atomizing nozzles 10. Therefore, the atomizing nozzles 10 can be driven to move up and down synchronously near one end of the water storage ring 12 during the up-and-down movement of the water storage ring 12, which can adjust the spraying angle of the atomizing nozzle 10 and increase the longitudinal radiation angle of the atomizing nozzle 10.
[0039] Specifically, the corresponding driving mechanism 1 includes a front and rear axial driving motor 101, the driving motor 101 is provided with a follow-up rod 103 on the front side, and the front and rear ends of the follow-up rod 103 are eccentrically provided with a positioning rod 102, both of which are rotatably connected with the exhaust pipe 7. At this time, by fixing the relatively rear positioning rod 102 coaxially with the output shaft of the driving motor 101, the output shaft of the driving motor 101 can drive the follow-up rod 103 to move up and down linearly relative to the driving motor 101 during rotation.
[0040] At the same time, the upper end of the water storage ring 12 is connected with a follow-up pipe 8, the follow-up pipe 8 is in communication with the water outlet hose 4, and the upper end of the follow-up pipe 8 is fixedly connected with a driven slide rail 11, and the follow-up rod 103 is inserted into the driven slide rail 11. At this time, by constraining the inside height of the driven slide rail 11 to be equal to the diameter of the follow-up rod 103, the follow-up rod 103 can realize the up and down reciprocating linear motion of the water storage ring 12 under the premise that the driven slide rail 11 and the follow-up pipe 8, the water storage ring 12 cannot move left and right.
[0041] Specifically, the device is provided with a plurality of fixed slide rails 14 around the central axis of the water storage ring 12 at the lower end of the positioning member 9, and the plurality of fixed slide rails 14 correspond one-to-one with the plurality of atomizing nozzles 10.
[0042] Therefore, the device is fixedly connected with a driven rod 13 at the upper end of each atomizing nozzle 10, the central axis of the driven rod 13 is perpendicular to the central axis of the water storage ring 12, and the driven rod 13 is inserted into the corresponding fixed slide rail 14. At this time, by constraining the longitudinal height of the inside of the fixed slide rail 14 to be equal to the diameter of the driven rod 13, the height of the middle section of the atomizing nozzle 10 can be constrained, and the height of the atomizing nozzle 10 close to the water storage ring 12 can be adjusted to adjust the spraying angle of the atomizing nozzle 10.
[0043] It should be emphasized that in practice, the positioning member 9 cooperates with the fixed slide rail 14 to constrain the position of the middle section of the plurality of atomizing nozzles 10, and at this time, the position of the water storage ring 12 is adjusted by the follow-up rod 103, which can periodically adjust the angle of the plurality of atomizing nozzles 10.
[0044] At the same time, since the device does not constrain the horizontal position of the water storage ring 12, only the position of the atomizing nozzle 10 is constrained by the connecting hose 15 cooperating with the fixed slide rail 14 in practice, which can make the angle change frequency of the atomizing nozzle 10 faster, the change mode more diverse, and the coverage process more extensive.
[0045] It should be noted that in actual, the tail gas generated by the lime kiln moves downward along the inner wall of the reaction tube 5 in a spiral manner inside the reaction tube 5 through the inlet pipe 3, and in this process, the tail gas moving downward in a spiral manner will generate negative pressure phenomenon due to gas flow, therefore, after the tail gas flows to the lower end of the reaction tube 5, the solid-gas separation is carried out, and then the clean air after the separation spirally moves upward along the central axis of the reaction tube 5.
[0046] Therefore, in order to avoid the water storage ring 12 and the exhaust pipe 7 from hindering the corresponding clean air from being discharged out of the device upward, and to avoid the clean air from being disturbed and interfering with the normal downward spiral of the tail gas, the device restricts that the inner diameter of the water storage ring 12 is greater than the inner diameter of the lower end of the reaction tube 5, and the inner diameter of the exhaust pipe 7 is greater than the inner diameter of the water storage ring 12.
[0047] At the same time, in order to ensure that the tail gas can normally spiral downward in the reaction tube 5 as expected, the device restricts that the included angle between the side wall of the reaction tube 5 and the horizontal plane is greater than 10° and less than 30°.
[0048] In the actual use process of the device:
[0049] Firstly, the tail gas discharged by the lime kiln flows into the connecting pipe 2 through the inlet pipe 3, at this time, the tail gas impacts the inner wall of the connecting pipe 2 and is turned;
[0050] Then, the turned tail gas is in a spiral downward state through the connecting position of the connecting pipe 2 and the reaction tube 5;
[0051] After that, the driving mechanism 1 drives the water storage ring 12 to continuously reciprocate up and down, and in this process, the liquid in the sediment tank 6 is continuously transported to the water storage ring 12 inside through the water outlet hose 4 and is discharged through the atomizing nozzle 10, at this time, the atomizing nozzle 10 continuously swings up and down to contact with a large range of tail gas;
[0052] Finally, the tail gas continuously spirals downward to the bottom of the reaction tube 5, and the clean air spirally moves upward in the middle section of the reaction tube 5, and in this process, the liquid sprayed on the inner wall of the reaction tube 5 by the atomizing nozzle 10 continuously flows downward along the inner wall of the reaction tube 5.
[0053] Although the embodiments of the device have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the device, and the scope of the device is defined by the appended claims and their equivalents.
Claims
1. A lime kiln tail gas filtering device, comprising a sediment tank (6), one side of the sediment tank (6) being connected with a water outlet hose (4), and the upper end of the sediment tank (6) being connected with a water inlet pipe, characterized in that: It also includes the up and down axial connecting pipe (2), one side of the connecting pipe (2) is connected with the left and right axial air inlet pipe (3), the center axis of the air inlet pipe (3) and the center axis of the connecting pipe (2) are not in the same vertical plane; The lower end of the connecting pipe (2) is coaxially and sealingly connected with the reaction pipe (5), the reaction pipe (5) is a conical body, and the inner diameter of the lower end of the reaction pipe (5) is smaller than the inner diameter of the upper end of the reaction pipe (5), and the lower end of the reaction pipe (5) is communicated with the air inlet pipe (3); The upper end of the reaction pipe (5) is provided with a water storage ring (12), a plurality of atomizing nozzles (10) are arranged equidistantly around the center axis of the water storage ring (12), and the water outlet of each atomizing nozzle (10) faces the inner wall of the reaction pipe (5), and the water inlet of each atomizing nozzle (10) is communicated with the water storage ring (12) through a connecting hose (15); The upper end of the water storage ring (12) is provided with a driving mechanism (1), the driving mechanism (1) comprises a driving motor (101), and the water storage ring (12) moves up and down linearly through the driving mechanism (1); The upper end of the connecting pipe (2) is coaxially and sealingly connected with the exhaust pipe (7), and the lower end of the exhaust pipe (7) is fixedly connected with the positioning member (9), and the positioning member (9) is rotatably connected with the plurality of atomizing nozzles (10).
2. A lime kiln exhaust filter apparatus as claimed in claim 1, wherein: The upper end of the water storage ring (12) is connected with a follower pipe (8), the upper end of the follower pipe (8) is communicated with the water outlet hose (4), and the upper end of the follower pipe (8) is fixedly connected with a driven slide rail (11); The follower rod (103) is eccentrically fixedly connected with a positioning rod (102) at the front and rear ends, respectively, and the two positioning rods (102) are rotatably connected with the exhaust pipe (7), and the positioning rod (102) close to the driving motor (101) is coaxially fixedly connected with the output shaft of the driving motor (101).
3. A lime kiln exhaust filter according to claim 2, characterized in that: The upper end of each atomizing nozzle (10) is fixedly connected with a driven rod (13), and the center axis of the driven rod (13) is perpendicular to the center axis of the water storage ring (12); 4. A lime kiln exhaust filter according to claim 3, characterized in that: The lower end of the positioning member (9) is provided with a plurality of fixed slide rails (14) around the center axis of the water storage ring (12), and the plurality of fixed slide rails (14) correspond to the plurality of atomizing nozzles (10) one by one, and the driven rod (13) is inserted into the corresponding fixed slide rail (14). The inner diameter of the water storage ring (12) is greater than the inner diameter of the lower end of the reaction pipe (5), and the inner diameter of the exhaust pipe (7) is greater than the inner diameter of the water storage ring (12); 5. A lime kiln exhaust filter apparatus as claimed in claim 1, wherein: The angle between the side wall of the reaction pipe (5) and the horizontal plane is greater than 10° and less than 30°.