Quicklime slaking and drying system

Abstract

The quick lime slaking and drying system comprises a quick lime slaking device and a slaked lime drying device which are sequentially arranged, the quicklime slaking device comprises a horizontal double-shaft stirrer, and a sealing cover plate is arranged at the top of the horizontal double-shaft stirrer; the slaked lime drying device comprises a bottom support and a drying shell installed on the bottom support, a driving motor is arranged on one side of the drying shell, and an output shaft of the driving motor is connected with a slaked lime stirring mechanism arranged in the drying shell through a coupler. And the working efficiency of the digestion device is effectively improved. Drying is uniform, and the situation that slaked lime cannot be fully dried can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of lime treatment equipment, in particular to a quicklime digestion and drying system. Background Art

[0002] The existing quicklime digestion device can use a horizontal double-shaft mixer plus spraying water for digestion reaction. However, in the existing double-shaft mixer, the spraying water is often too concentrated, and the spraying part is easily blocked by quicklime and not easy to clean, thus affecting the use of the digestion device. After being crushed to form quicklime particles, they are sent into the digestion device for digestion, and then dried. Most of the existing slaked lime drying devices use a screw conveyor for in-process drying. Such drying may result in uneven drying and incomplete drying of some slaked lime. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a quicklime digestion and drying system for the above-mentioned defects.

[0004] The utility model includes a quicklime digestion device and a slaked lime drying device arranged in sequence; the quicklime digestion device includes a horizontal double-shaft mixer, and a sealing cover plate is arranged on the top of the horizontal double-shaft mixer; the slaked lime drying device includes a bottom support and a drying housing installed thereon. A driving motor is arranged on one side of the drying housing, and the output shaft of the driving motor is connected to a slaked lime agitating mechanism arranged in the drying housing through a coupling;

[0005] A quicklime granular material inlet pipe is arranged at the front end of the sealing cover plate. A plurality of water inlet mechanisms and air extraction mechanisms are alternately arranged in sequence behind the quicklime granular material inlet pipe; the water inlet mechanism includes a cylindrical part penetrating through the sealing cover plate, a sealing top plate arranged on the top of the cylindrical part, and a spray head arranged on the bottom of the cylindrical part. An inlet branch pipe is connected to the sealing top plate, and the end of the inlet branch pipe is connected to an inlet main pipe. The air extraction mechanism includes an air extraction hood connected to the sealing cover plate and an air extraction branch pipe arranged on its top. The end of the air extraction branch pipe is connected to an air extraction main pipe. A slaked lime discharge port with a discharge valve is arranged at the tail end of the horizontal double-shaft mixer;

[0006] The drying housing has a spindle-shaped structure. At the top of the drying housing, there is an inlet for slaked lime material, and at the bottom, there is an outlet for dried slaked lime material. Below the outlet of the slaked lime, there is a slaked lime conveyor belt. The discharging end of the slaked lime conveyor belt is directly above the inlet for slaked lime material. On the side wall of the inlet for slaked lime material, there is a hot gas discharge pipe connected. The drying housing is divided into an inner layer of the housing and an outer layer of the housing. On the outer wall of the inner layer of the housing, there is a heat-conducting medium coil pipe with a semi-circular pipe structure, which is evenly laid from one side of the drying housing to the other side. In the space between the inner layer of the housing and the outer layer of the housing, except for the space occupied by the heat-conducting medium coil pipe, there is heat-insulating asbestos filled. The slaked lime agitating mechanism includes a rotating shaft connected to a coupling and a group of slaked lime agitating rods arranged on the rotating shaft. The group of slaked lime agitating rods consists of a pair of middle agitating rods a and multiple pairs of side agitating rods b symmetrically distributed on both sides of the middle agitating rods a.

[0007] Preferably, a dust-proof filter screen is adhesively bonded at the connection between the air extraction hood and the air extraction branch pipe.

[0008] Preferably, the upper part of the cylindrical part is above the sealing cover plate, and the lower part of the cylindrical part is inside the stirring cavity of the horizontal double-shaft mixer below the sealing cover plate. The bottom of the cylindrical part is provided with an external thread part, and the spray head is a cover with an internal thread part adapted to the external thread part. Multiple water outlet holes are evenly arranged on the cover.

[0009] Preferably, the edge of the sealing cover plate is provided with multiple installation screw holes. The top of the housing of the horizontal double-shaft mixer is provided with fixing screw holes adapted to the installation screw holes. Below the sealing cover plate, there is also a rubber sealing pad with screw passing holes. Multiple screws sequentially pass through the installation screw holes and the screw passing holes and are connected to the fixing screw holes.

[0010] Preferably, the number of the water inlet mechanism and the air extraction mechanism is four each, and they are evenly distributed on the top of the sealing cover plate.

[0011] Preferably, the medium inlet pipe of the heat-conducting medium coil pipe is on one side of the drying housing, and the medium outlet pipe is on the other side of the drying housing. The medium inlet pipe and the medium outlet pipe penetrate through the outer layer of the housing and are connected to the medium circulation pipeline. A heat-conducting medium circulation heating device is provided on the medium circulation pipeline. The heat-conducting medium circulation heating device is a heat-conducting oil circulation heating device.

[0012] Preferably, at the ends of a pair of middle agitating rods a, a horizontal agitating block a is fixedly connected. The number of multiple pairs of side agitating rods b is two pairs, and at the ends of the side agitating rods b, an inclined agitating block b is fixedly connected.

[0013] Preferably, the hot gas discharge pipe is connected to an air extraction pump through an air extraction pipeline. The inner layer of the housing is made of high heat-conducting alloy steel, and the heat-conducting medium coil pipe is made of aluminum pipe or copper pipe.

[0014] The advantages of the present utility model are as follows: the spraying water is dispersed, and the spraying part is convenient for disassembly and cleaning, effectively improving the working efficiency of the digestion device. The drying is uniform, which can effectively avoid the situation where the slaked lime cannot be fully dried. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the connection relationship of the present utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the quicklime digestion device.

[0017] Figure 3 It is a schematic diagram of the structure of the sealing cover plate.

[0018] Figure 4 It is a schematic diagram of the structure of the water inlet mechanism.

[0019] Figure 5 It is a schematic diagram of the structure of the cylindrical part.

[0020] Figure 6 It is a schematic diagram of the structure of the sealing cover.

[0021] Figure 7 It is a schematic diagram of the structure of the slaked lime drying device.

[0022] Figure 8 It is a schematic diagram of the structure of the slaked lime stirring mechanism. Detailed Description of the Preferred Embodiment

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0024] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but is merely representative of selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, in the description of the present utility model, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "connected" are 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] As shown in the drawings, the present utility model includes a quicklime digestion device 102 and a slaked lime drying device 103 arranged in sequence; the quicklime digestion device 102 includes a horizontal double-shaft mixer 31, and a sealing cover plate 32 is provided at the top of the horizontal double-shaft mixer 31; the slaked lime drying device 103 includes a bottom bracket 50 and a drying housing 51 installed thereon, a driving motor 52 is provided on one side of the drying housing 51, and the output shaft of the driving motor is connected to a slaked lime agitating mechanism arranged in the drying housing 51 through a coupling;

[0028] A quicklime granule inlet pipe 33 is provided at the front end of the sealing cover plate 32, and a plurality of water inlet mechanisms 34 and air extraction mechanisms 35 are alternately arranged in sequence behind the quicklime granule inlet pipe 33; the water inlet mechanism 34 includes a cylindrical part 36 penetrating through the sealing cover plate 32, a sealing top plate 37 provided at the top of the cylindrical part 36, and a spray head provided at the bottom of the cylindrical part 36. An inlet water branch pipe 38 is connected to the sealing top plate 37, and the end of the inlet water branch pipe 38 is connected to an inlet water main pipe 39. The air extraction mechanism 35 includes an air extraction hood 40 connected to the sealing cover plate 32 and an air extraction branch pipe 41 provided at its top, and the end of the air extraction branch pipe 41 is connected to an air extraction main pipe 42. A slaked lime discharge port 43 with a discharge valve is provided at the tail end of the horizontal double-shaft mixer 31;

[0029] The drying housing 51 has a spindle-shaped structure. A slaked lime material inlet 53 is provided at the top of the drying housing 51, and a dried slaked lime material outlet 54 is provided at the bottom. Below the slaked lime discharge port 43, there is a slaked lime conveyor belt, and the discharge end of the slaked lime conveyor belt is directly above the slaked lime material inlet 53. A hot gas discharge pipe 55 is connected to the side wall of the slaked lime material inlet 53. The drying housing 51 is divided into an inner housing layer 56 and an outer housing layer 57. A heat transfer medium coil pipe 58 with a semi-circular pipe structure is welded to the outer wall of the inner housing layer 56. The heat transfer medium coil pipe 58 is evenly laid from one side to the other side of the drying housing 51. The space between the inner housing layer 56 and the outer housing layer 57, except for the space occupied by the heat transfer medium coil pipe 58, is filled with heat-insulating asbestos 59. The slaked lime agitating mechanism includes a rotating shaft 60 connected to a coupling and a slaked lime agitating rod group provided on the rotating shaft 60. The slaked lime agitating rod group is composed of a pair of middle stirring rods a61 and multiple pairs of side stirring rods b62 symmetrically distributed on both sides of the middle stirring rods a61.

[0030] In another technical solution, a dust-proof filter screen is adhesively bonded at the connection of the air extraction hood 40 and the air extraction branch pipe 41.

[0031] In another technical solution, the upper part of the cylindrical part 36 is located above the sealing cover plate 32, and the lower part of the cylindrical part 36 is located in the stirring cavity of the horizontal double-shaft mixer 31 below the sealing cover plate 32. An external thread part 150 is provided at the bottom of the cylindrical part 36. The spray head is a cover 152 with an internal thread part 151 adapted to the external thread part 150, and a plurality of water outlet holes 153 are evenly provided on the cover 152.

[0032] In another technical solution, a plurality of installation screw holes are provided at the edge of the sealing cover plate 32, and fixing screw holes adapted to the installation screw holes are provided at the top of the housing of the horizontal double-shaft mixer 31. A rubber gasket with a screw through hole is further provided below the sealing cover plate 32. A plurality of screws sequentially pass through the installation screw holes and the screw through holes and are connected to the fixing screw holes.

[0033] In another technical solution, the number of the water inlet mechanism 34 and the air extraction mechanism 35 is four each, and they are evenly distributed on the top of the sealing cover plate 32.

[0034] In another technical solution, the medium inlet pipe 63 of the heat transfer medium coil pipe 58 is located on one side of the drying housing 51, and the medium outlet pipe 64 is located on the other side of the drying housing 51. The medium inlet pipe 63 and the medium outlet pipe 64 penetrate through the outer housing layer 57 and are connected to the medium circulation pipeline. A heat transfer medium circulation heating device is provided on the medium circulation pipeline. The heat transfer medium circulation heating device is a heat-conducting oil circulation heating device.

[0035] In another technical solution, a horizontal stirring block a65 is fixedly connected to the end of a pair of middle stirring rods a61, the number of multiple pairs of side stirring rods b62 is two pairs, and an inclined stirring block b66 is fixedly connected to the end of the side stirring rods b62.

[0036] In another technical solution, the hot gas discharge pipe 55 is connected to the air extraction pump through an air extraction pipeline. The inner layer 56 of the shell is made of high thermal conductivity alloy steel, and the heat conduction medium coil pipe 58 is an aluminum pipe or a copper pipe.

[0037] Working mode: The crushed quicklime granular material is added into the stirring cavity of the horizontal double-shaft mixer 31 through the lime granular material inlet pipe 33 at the front end of the sealing cover plate 32, and then spray water is added and hot gas is extracted through multiple water inlet mechanisms 34 and air extraction mechanisms 35. Stirring and digestion are carried out through the double spiral stirring shafts in the horizontal double-shaft mixer 31. After digestion is completed, the slaked lime is discharged to the slaked lime conveyor belt through the slaked lime discharge port 43 with a discharge valve.

[0038] The slaked lime conveyor belt adds the digested slaked lime material into the slaked lime material inlet 53 at the top of the drying shell 51, then closes the slaked lime material inlet 53, starts the drive motor to drive the slaked lime stirring mechanism in the drying shell 51 to stir the slaked lime, and at the same time heats the inner layer 56 of the shell through the heat conduction medium coil pipe 58 to heat and dry the slaked lime material. During the drying period, the hot gas generated by heating can be extracted through the hot gas discharge pipe 55 and the air extraction pipeline connected to the air extraction pump. After drying is completed, the discharge valve of the slaked lime dry material outlet 54 is opened to discharge the dried slaked lime material.

[0039] The above embodiments are only for explaining the technical solutions and features of the present invention, and the purpose is to better enable those familiar with the technology to implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention are within the protection scope of the present invention. Those not described in detail are prior arts.

Claims

1. A quicklime digestion and drying system, comprising a quicklime digestion device (102) and a slaked lime drying device (103) arranged in sequence; the quicklime digestion device (102) comprises a horizontal double-shaft mixer (31), and a sealing cover plate (32) is arranged on the top of the horizontal double-shaft mixer (31); the slaked lime drying device (103) comprises a bottom bracket (50) and a drying shell (51) mounted thereon, a driving motor (52) is arranged on one side of the drying shell (51), and an output shaft of the driving motor is connected to a slaked lime stirring mechanism arranged in the drying shell (51) through a coupling, characterized in that: A quicklime granular material inlet pipe (33) is provided at the front end of the sealing cover plate (32), and a plurality of water inlet mechanisms (34) and air extraction mechanisms (35) are alternately provided at the rear of the quicklime granular material inlet pipe (33); the water inlet mechanism (34) comprises a cylindrical portion (36) penetrating the sealing cover plate (32), a sealing top plate (37) provided at the top of the cylindrical portion (36), and a spray head provided at the bottom of the cylindrical portion (36); a water inlet branch pipe (38) is connected to the sealing top plate (37), and the end of the water inlet branch pipe (38) is connected to the water inlet main pipe (39); the air extraction mechanism (35) comprises an air extraction hood (40) connected to the sealing cover plate (32) and an air extraction branch pipe (41) provided at the top thereof, and the end of the air extraction branch pipe (41) is connected to the air extraction main pipe (42); and a slaked lime discharge port (43) with a discharge valve is provided at the tail end of the horizontal double-shaft mixer (31); The drying shell (51) is a spindle-shaped structure. A slaked lime material inlet (53) is provided at the top of the drying shell (51), and a slaked lime drying material outlet (54) is provided at the bottom. A slaked lime conveyor belt is provided below the slaked lime discharge port (43). The discharge end of the slaked lime conveyor belt is located directly above the slaked lime material inlet (53). A hot gas discharge pipe (55) is connected to the side wall of the slaked lime material inlet (53). The drying shell (51) is divided into a shell inner layer (56) and a shell outer layer (57). A semicircular tube structure guide is welded to the outer wall of the shell inner layer (56). The heat medium coil (58) and the heat conducting medium coil (58) are evenly laid from one side to the other side of the drying shell (51); the gap between the shell inner layer (56) and the shell outer layer (57) except the heat conducting medium coil (58) is filled with thermal insulation asbestos (59); the slaked lime stirring mechanism includes a rotating shaft (60) connected to the coupling and a slaked lime stirring rod group arranged on the rotating shaft (60); the slaked lime stirring rod group includes a pair of middle stirring rods a (61) and a plurality of pairs of side stirring rods b (62) symmetrically distributed on both sides thereof.

2. A quicklime digestion and drying system according to claim 1, characterized in that: The upper part of the cylindrical part (36) is located above the sealing cover plate (32), and the lower part of the cylindrical part (36) is located in the stirring chamber of the horizontal double-shaft mixer (31) below the sealing cover plate (32). The bottom of the cylindrical part (36) is provided with an external threaded part (150), and the spray head is a sealing cover (152) with an internal threaded part (151) matched with the external threaded part (150), and a plurality of water outlet holes (153) are evenly arranged on the sealing cover (152).

3. A quicklime digestion and drying system according to claim 1, characterized in that: The edge of the sealing cover plate (32) is provided with a plurality of mounting screw holes, the top of the housing of the horizontal twin-shaft mixer (31) is provided with fixing screw holes matched with the mounting screw holes, and a rubber sealing pad with screw through holes is also provided below the sealing cover plate (32), and a plurality of screws are sequentially passed through the mounting screw holes and the screw through holes to be connected with the fixing screw holes.

4. A quicklime digestion and drying system according to claim 1, characterized in that: The number of the water inlet mechanisms (34) and the number of the air extraction mechanisms (35) are both four, and they are evenly distributed on the top of the sealing cover plate (32).

5. The quicklime digestion and drying system according to claim 1, characterized in that: The medium inlet pipe (63) of the heat-conducting medium coil (58) is located on one side of the drying shell (51), and the medium outlet pipe (64) is located on the other side of the drying shell (51). The medium inlet pipe (63) and the medium outlet pipe (64) penetrate the outer layer (57) of the shell and are connected to the medium circulation pipeline. The medium circulation pipeline is provided with a heat-conducting medium circulation heating device.

6. A quicklime digestion and drying system according to claim 1, characterized in that: The ends of a pair of middle stirring rods a (61) are fixedly connected to a horizontal stirring block a (65), and the number of the multiple pairs of side stirring rods b (62) is two pairs, and the ends of the side stirring rods b (62) are fixedly connected to an inclined stirring block b (66).

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