Calcium oxide preparation calcium hydroxide digestion machine

Abstract

The utility model discloses a calcium oxide preparation calcium hydroxide digestion machine, including jar body, the jar body outer surface is fixed with intermediate box, its characterized in that, the intermediate box top connection fixed with top board, the intermediate box bottom connection fixed with bottom plate, the jar body rotates and is provided with one spiral stirring shaft and stirring vane shaft in front and back respectively, spiral stirring shaft and stirring vane shaft between fixed connection, the bottom plate top is provided with the support assembly of the rotary support of spiral stirring shaft and stirring vane shaft, the jar body both sides still are provided with the power component of the rotary of stirring vane shaft and spiral stirring shaft, have installed first end cover and second end cover respectively on the both sides of jar body, personnel can place in the jar body through spiral stirring shaft and stirring vane shaft, then install first end cover and second end cover, can make first end cover and second end cover install, avoid destroying the end wall integrity of jar body.

Description

Technical Field

[0001] This utility model relates to the field of digestion equipment technology, specifically a calcium oxide digester for preparing calcium hydroxide. Background Technology

[0002] Existing digesters are horizontally designed, but the tanks are installed separately, requiring a high degree of sealing between the tanks. Because digesters are relatively long, a complete tank structure would improve the equipment's sealing performance and extend its lifespan. While some existing digesters use a complete tank structure, the presence of a spiral agitator shaft and impeller shaft necessitates the installation of support components in the middle section. Installing these support components in current digesters is cumbersome, as the tank structure lacks convenient components for personnel to install them, making installation and maintenance extremely inconvenient. Extensive research has been conducted to address this issue. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a calcium oxide digestion machine for preparing calcium hydroxide, which can solve the problems in the prior art.

[0004] This utility model is achieved through the following technical solution: A calcium oxide-to-calcium hydroxide digester of this utility model includes a tank, with an intermediate box fixed to the outer surface of the tank. The intermediate box has a top plate fixedly connected to its top and a bottom plate fixedly connected to its bottom. The tank is rotatably equipped with a front and rear spiral stirring shaft and a stirring blade shaft, which are fixedly connected. A support assembly for rotating the spiral stirring shaft and the stirring blade shaft is provided on the top of the bottom plate. Power components for rotating the stirring blade shaft and the spiral stirring shaft are also provided on both sides of the tank.

[0005] A further technical solution is provided with a hopper connected to the top right side of the tank, multiple top pipe openings connected to the top left side of the tank, multiple liquid inlets connected to the front and rear ends of the left side of the tank, the liquid inlets being connected to the interior of the tank, and a bottom discharge port connected to the lower left side of the tank.

[0006] A further technical solution is that the spiral blades on the front and rear sides of the spiral stirring shaft are staggered, and the stirring blades on the outer surface of the front and rear sides of the stirring blade shaft are cross-arranged.

[0007] In a further technical solution, the tank body is provided with an inner cavity, which is connected to the bottom discharge port, the top pipe port, the liquid inlet and the hopper.

[0008] A further technical solution includes a support component comprising a second connecting block fixed to the top of the base plate, a column fixed to the top of the second connecting block, a housing detachably fixed to the top of the column, flanges fixed to the ends of the stirring blade shaft and the spiral stirring shaft, the flanges being connected and fixed together by fasteners, the flanges being located inside the column and the housing, and the stirring blade shaft and the spiral stirring shaft rotating within the housing and the column.

[0009] In a further technical solution, a first connecting block is fixed at the bottom of the top plate, one at the front and one at the back.

[0010] A further technical solution includes a power assembly comprising a second end cap and a first end cap. The second end cap and the first end cap are detachably and fixedly connected to both ends of the tank body by fasteners. The left side of the first end cap is fixed with one front and one rear first bearing seat, and the stirring blade shaft is rotatably connected to the first bearing seat. The right side of the second end cap is fixed with one front and one rear second bearing seat, and the spiral stirring shaft is rotatably connected to the second bearing seat. The right side of the second end cap is fixed with a motor structure that drives the spiral stirring shaft to rotate.

[0011] A further technical solution includes a motor structure comprising a geared motor fixed to the right side of the second end cover, wherein a coupling is poweredly connected to the output shaft of the geared motor, and the coupling is poweredly connected to the spiral stirring shaft.

[0012] The beneficial effects of this utility model are as follows: First, by setting a bottom plate on the lower side of the intermediate box and a top plate on the upper side of the intermediate box, personnel can install the bottom plate, the second connecting block and the column from the lower side of the intermediate box, so that the stirring blade shaft and the spiral stirring shaft can be initially rotatably connected with the top of the column. Personnel can connect and fix the flange at the end of the spiral stirring shaft and the stirring blade shaft through the opening at the top of the intermediate box, and then install and fix the shell on the top of the column. This allows the shell and the column to provide rotational support for the spiral stirring shaft and the stirring blade shaft, and forms a flange cover structure, resulting in better sealing.

[0013] Second, the first end cover and the second end cover are installed on both sides of the tank body respectively, and the connection is detachable. Therefore, during installation, personnel can place the spiral stirring shaft and the stirring blade shaft into the tank body, and then install the first end cover and the second end cover, so as to avoid damaging the integrity of the end wall of the tank body. Attached Figure Description

[0014] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0015] Figure 1This is a schematic diagram of the overall structure of a calcium oxide digester for preparing calcium hydroxide according to the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the equipment from below; Figure 3 for Figure 1 A schematic diagram of the vertical cross-sectional structure of the equipment; Figure 4 for Figure 1 A schematic diagram of the equipment after the tank body has been removed; Figure 5 for Figure 1 Internal structure diagram of the equipment; Figure 6 for Figure 1 A schematic diagram of the transverse cross-section of the equipment; In the figure, the components are: base 11, intermediate box 12, tank 13, second bearing seat 14, coupling 15, geared motor 16, spiral stirring shaft 17, second end cover 18, hopper 19, top plate 21, top pipe opening 22, bottom discharge port 23, bottom plate 24, first end cover 25, stirring blade shaft 26, first bearing seat 27, liquid inlet 28, inner cavity 31, flange 32, column 33, shell 34, first connecting block 41, and second connecting block 42. Detailed Implementation

[0016] like Figures 1-6 As shown, this utility model will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The projection relationships of this utility model are consistent in the up, down, left, right, front, and back directions. A calcium oxide preparation calcium hydroxide digester includes a tank 13, with a middle box 12 fixed to the outer surface of the tank 13. A top plate 21 is detachably connected to the top of the middle box 12, and a bottom plate 24 is detachably connected to the bottom of the middle box 12. Inside the tank 13, a spiral stirring shaft 17 and a stirring blade shaft 26 are rotatably arranged at the front and rear, respectively. The spiral stirring shaft 17 and the stirring blade shaft 26 are fixedly connected. A support assembly is provided on the top of the bottom plate 24 to support the rotation of the spiral stirring shaft 17 and the stirring blade shaft 26. Power components for rotating the stirring blade shaft 26 and the spiral stirring shaft 17 are also provided on both sides of the tank 13.

[0017] Advantageously, a hopper 19 is connected to the top right side of the tank body 13, multiple top pipe openings 22 are connected to the top left side of the tank body 13, multiple liquid inlets 28 are provided at the front and rear ends of the left side of the tank body 13, the liquid inlets 28 are connected to the inside of the tank body 13, the liquid inlets 28 are used to connect to water spray nozzles to provide water for mixing with calcium oxide, and a bottom discharge port 23 is connected to the lower left side of the tank body 13.

[0018] Advantageously, the spiral blades of the front and rear spiral stirring shafts 17 are staggered, and the stirring blades on the outer surface of the front and rear stirring blade shafts 26 are cross-arranged, so that the front and rear spiral stirring shafts 17 can crush large pieces of calcium oxide while conveying, and then convey them toward the stirring blade shafts 26. The cross-arranged stirring blades stir the calcium oxide and water, so that the calcium oxide and water are mixed evenly and react fully, and then fall from the bottom discharge port 23.

[0019] Advantageously, the spiral blades of the front and rear spiral stirring shafts 17 are arranged in an alternating manner (spiral angle 30°-45°). During the conveying process, large pieces of calcium oxide are broken up by the squeezing action between the blades and conveyed along the axial direction of the tank body 13 toward the stirring blade shaft 26, which is a pretreatment for the subsequent mixing reaction.

[0020] Advantageously, the top pipe opening 22 is used to connect a pipe, which needs to be connected to a water tank for adsorbing steam and calcium oxide powder, the hopper 19 is used to feed calcium oxide, and the bottom discharge port 23 is used to connect a discharge pipe for receiving calcium hydroxide.

[0021] Advantageously, the tank body 13 is provided with an inner cavity 31, which is connected to the bottom discharge port 23, the top pipe port 22, the liquid inlet 28 and the hopper 19.

[0022] Advantageously, the bottom of the tank body 13 is fixed with a base 11 on the left and right sides.

[0023] Advantageously, the support assembly includes a second connecting block 42 fixed to the top of the base plate 24, a column 33 fixed to the top of the second connecting block 42, a housing 34 detachably fixed to the top of the column 33, flanges 32 fixed to the ends of the stirring blade shaft 26 and the spiral stirring shaft 17, the flanges 32 being connected and fixed together by fasteners, the flanges 32 being located inside the column 33 and the housing 34, and the stirring blade shaft 26 and the spiral stirring shaft 17 rotating within the housing 34 and the column 33, the housing 34 and the column 33 forming a circular hole, and the stirring blade shaft 26 and the spiral stirring shaft 17 being rotatably connected to the circular hole.

[0024] The flange 32 is located in the cavity formed by the column 33 and the shell 34. The stirring blade shaft 26 and the spiral stirring shaft 17 are sealed with the inner wall of the round hole by the skeleton oil seal to prevent calcium oxide powder from entering.

[0025] Advantageously, the top plate 21 has a first connecting block 41 fixed at the bottom at the front and back, and the first connecting block 41 and the second connecting block 42 have an arc-shaped surface and a plane on one side, which fits against the inner wall of the inner cavity 31.

[0026] Advantageously, the power assembly includes a second end cover 18 and a first end cover 25. The second end cover 18 and the first end cover 25 are detachably fixed to both ends of the tank body 13 by fasteners. The left side of the first end cover 25 is fixed with a first bearing seat 27 at the front and a first bearing seat 27 at the rear. The stirring blade shaft 26 is rotatably connected to the first bearing seat 27. The right side of the second end cover 18 is fixed with a second bearing seat 14 at the front and a second bearing seat 14 at the rear. The spiral stirring shaft 17 is rotatably connected to the second bearing seat 14. The right side of the second end cover 18 is fixed with a motor structure that drives the spiral stirring shaft 17 to rotate.

[0027] Advantageously, the motor structure includes a geared motor 16 fixed to the right side of the second end cover 18, and a coupling 15 is poweredly connected to the output shaft of the geared motor 16. The coupling 15 is poweredly connected to the spiral stirring shaft 17.

[0028] When the equipment is working, calcium oxide blocks are fed into the hopper 19. The top pipe port 22 is connected to a pipe, which is connected to a water tank. The liquid inlet 28 is connected to a water spray nozzle to provide water. The bottom outlet 23 is connected to a discharge pipe. When the equipment is working, the geared motor 16 drives the spiral stirring shaft 17 and the stirring blade shaft 26 to rotate synchronously. The geared motors 16 on both sides are motors of the same specification and are controlled by an encoder. Before each start, the encoder is used to complete the zero point calibration to ensure that the start and stop positions are consistent. Before the motor starts, the motor is zeroed to ensure that each operation starts from the coordinate zero point.

[0029] The spiral blades on the outer surface of the spiral stirring shaft 17 and the stirring blades on the outer surface of the stirring blade shaft 26 are staggered and parallel to each other, so they will not interfere with each other when they are running.

[0030] The spiral stirring shaft 17 crushes the calcium oxide blocks falling into the hopper 19 and then enters the left end of the tank 13. The stirring blade shaft 26 then fully mixes the water and calcium oxide blocks. After continuous conveying to the left, the calcium oxide and water are fully mixed under the action of the stirring blade shaft 26, and a digestion reaction occurs in the inner cavity 31 of the tank 13 (reaction temperature 60-80℃, reaction time 10-15min). The generated calcium hydroxide is continuously discharged from the bottom outlet 23, and the steam and calcium oxide powder are discharged from the equipment through the top pipe outlet 22.

[0031] During installation, the stirring impeller shaft 26 and the spiral stirring shaft 17 are connected and fixed using a flange 32 and bolts. The assembled stirring shaft assembly is then placed into the inner cavity 31 of the tank 13. A first end cover 25 and a second end cover 18 are installed at both ends of the tank 13. A first bearing seat 27 is installed on the outside of the first end cover 25, and a second bearing seat 14 and a reduction motor 16 are installed on the outside of the second end cover 18. The bottom plate 24, the second connecting block 42, and the column 33 are then installed and fixed from the bottom of the tank 13, so that the column 33 is rotatably connected to the stirring impeller shaft 26 and the spiral stirring shaft 17. A flange 32 is then placed between the stirring impeller shaft 26 and the spiral stirring shaft 17 and fixed with fasteners, so that the stirring impeller shaft 26 and the spiral stirring shaft 17 are poweredly connected. The housing 34 is then placed from the top of the intermediate box 12 and fixed to the column 33. Finally, the top plate 21 is installed and fixed to the top of the intermediate box 12.

[0032] The outer surface of the tank 13 is wrapped with a rock wool insulation layer to prevent operators from being scalded; the top of the hopper 19 is equipped with a grid cover to prevent large impurities from entering and personnel from accidentally touching it; the electrical system of the equipment is equipped with overload protection to prevent motor stalling and damage.

[0033] The tank body 13 is made of 304 stainless steel, which is resistant to corrosion by calcium oxide and calcium hydroxide; the stirring blade shaft 26 and the spiral stirring shaft 17 are made of 2Cr13 stainless steel to improve wear resistance.

[0034] The geared motor 16 is a three-phase asynchronous motor, which reduces the speed of the stirring shaft through a reducer.

[0035] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the protection scope of this utility model; therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A calcium oxide digester for preparing calcium hydroxide, comprising a tank (13), wherein an intermediate box (12) is fixed to the outer surface of the tank (13), characterized in that, The top of the intermediate box (12) is connected and fixed with a top plate (21), and the bottom of the intermediate box (12) is connected and fixed with a bottom plate (24). The tank (13) is rotatably equipped with a front and rear spiral stirring shaft (17) and a stirring blade shaft (26). The spiral stirring shaft (17) and the stirring blade shaft (26) are fixedly connected. The bottom plate (24) is provided with a support assembly on top to support the rotation of the spiral stirring shaft (17) and the stirring blade shaft (26). The tank (13) is also provided with a power assembly on both sides to make the stirring blade shaft (26) and the spiral stirring shaft (17) rotate.

2. The calcium oxide digester for preparing calcium hydroxide according to claim 1, characterized in that: A hopper (19) is connected to the top right side of the tank (13), a plurality of top pipe openings (22) are connected to the top left side of the tank (13), a plurality of liquid inlets (28) are provided at the front and rear ends of the left side of the tank (13), the liquid inlets (28) are connected to the inside of the tank (13), and a bottom discharge port (23) is connected to the lower left side of the tank (13).

3. The calcium oxide digester for preparing calcium hydroxide according to claim 1, characterized in that: The spiral blades of the front and rear spiral stirring shafts (17) are staggered, and the stirring blades on the outer surface of the front and rear stirring blade shafts (26) are crossed.

4. The calcium oxide digester for preparing calcium hydroxide according to claim 2, characterized in that: The tank (13) is provided with an inner cavity (31), which is connected to the bottom outlet (23), the top pipe outlet (22), the liquid inlet (28) and the hopper (19).

5. The calcium oxide digester for preparing calcium hydroxide according to claim 1, characterized in that: The support assembly includes a second connecting block (42) fixed to the top of the base plate (24), a column (33) fixed to the top of the second connecting block (42), a housing (34) detachably fixed to the top of the column (33), a flange (32) fixed to the end of the stirring blade shaft (26) and the spiral stirring shaft (17), the flanges (32) being connected and fixed to each other by fasteners, the flanges (32) being located inside the column (33) and the housing (34), and the stirring blade shaft (26) and the spiral stirring shaft (17) rotating inside the housing (34) and the column (33).

6. The calcium oxide digester for preparing calcium hydroxide according to claim 5, characterized in that: The top plate (21) has a first connecting block (41) fixed at the bottom at both the front and rear.

7. The calcium oxide digester for preparing calcium hydroxide according to claim 1, characterized in that: The power assembly includes a second end cap (18) and a first end cap (25). The second end cap (18) and the first end cap (25) are detachably fixed to both ends of the tank body (13) by fasteners. The first end cap (25) has a first bearing seat (27) fixed on the left side, and the stirring blade shaft (26) is rotatably connected to the first bearing seat (27). The second end cap (18) has a second bearing seat (14) fixed on the right side, and the spiral stirring shaft (17) is rotatably connected to the second bearing seat (14). The second end cap (18) has a motor structure fixed on the right side to drive the spiral stirring shaft (17) to rotate.

8. A calcium oxide digester for preparing calcium hydroxide according to claim 7, characterized in that: The motor structure includes a geared motor (16) fixed to the right side of the second end cover (18). A coupling (15) is poweredly connected to the output shaft of the geared motor (16), and the coupling (15) is poweredly connected to the spiral stirring shaft (17).

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