Dust treatment device and process for preparing calcium hydroxide from quick lime

Abstract

The invention relates to the technical field of dust treatment, and discloses a dust treatment device and process for preparing calcium hydroxide from quicklime, the dust treatment device comprises a digester, a slag discharge port, a driving motor and a stirring shaft, and further comprises a belt pulley set in transmission connection with the stirring shaft, and a driving mechanism is arranged on the outer wall of one side of the digester; a protective box body is arranged at the top of the digester, a dust removal mechanism is arranged in the protective box body, and a material slag treatment mechanism is arranged on the side, opposite to the driving mechanism, of the digester. A gear ring drives an inner sleeve to rotate and drives a turbulent flow disc to rotate, so that a top plate can move downwards to be in closer contact with dust, and the dust absorption effect is improved; in the downward absorption process, the turbulent flow disc is driven to rotate, the circulation effect of dust in the digester is good, the absorption efficiency is further improved, in addition, the spraying head is driven to be close to dust located below, and the dust falling uniformity is better.

Description

Technical Field

[0001] The present invention relates to the technical field of dust treatment, in particular to a dust treatment device and process for preparing calcium hydroxide from quicklime. Background Art

[0002] Quicklime, also known as burnt lime, is mainly composed of calcium oxide and is the main raw material for the production and preparation of calcium hydroxide. During operation, quicklime is fed into the digester, and water and quicklime are continuously added to the digester in a certain ratio. In the digester, the quicklime and water react violently to produce calcium hydroxide.

[0003] For a process of wet digestion of quicklime, when the quicklime is added to the digestion tank and comes into contact with water, the reaction between the quicklime and water is relatively violent, which will generate a certain impact force, causing some lime particles to be splashed to form dust. At the same time, the heat generated by the reaction will accelerate the flow of surrounding air, which will also cause some fine lime particles to fly. At this stage, the dust needs to be quickly processed and controlled. For this reason, we proposed a dust treatment device and process for preparing calcium hydroxide from quicklime. Summary of the Invention

[0004] The present invention aims to provide a dust treatment device and process for preparing calcium hydroxide from quicklime, in order to solve the problems raised in the above-mentioned background art. To achieve the above-mentioned objectives, the present invention provides the following technical solution: comprising a digester, a slag discharge port, a drive motor, and an agitator shaft, and also comprising a pulley assembly connected to the agitator shaft; a drive mechanism is provided on one outer wall of the digester; a protective box is provided on the top of the digester; a dust removal mechanism is provided within the protective box; and a slag treatment mechanism is provided on the side of the digester opposite the drive mechanism.

[0005] The dust removal mechanism includes a top plate, which is slidably connected to the digester, a lifting plate fixedly connected to one side of the top of the top plate, one end of the lifting plate fixedly connected to the steel belt, a column fixedly connected to the connection between the top plate and the digester, a spring 2 is sleeved on the column, a worm gear is rotatably connected to the top of the column, a rack is fixedly connected to the side of the lifting plate, a gear 1 is meshed with the bottom of the rack, a worm is fixedly connected to the side of the gear 1, the worm is rotatably connected to the protective box, and a lifting shaft is movably sleeved inside the column;

[0006] A fan is fixedly installed on the top of the protective box, and the input end of the fan is connected to a filter tube, which connects the inside and outside of the protective box. One end of the filter tube located inside the protective box is connected to a condenser, and an inner sleeve is installed on the bottom of the condenser, and the bottom end of the inner sleeve is fixedly connected to a spoiler.

[0007] Preferably, the driving mechanism includes a rotating shaft connected to one end of the pulley group, a shift bar is slidably connected to the rotating shaft, a spring is sleeved and installed on the rotating shaft between the shift bar and the pulley group, the other end of the rotating shaft is rotatably connected to a turntable, the turntable is rotatably connected to the digester, and blocks are symmetrically provided on the surface of the turntable, the blocks abut against the shift bar, a steel belt is wrapped around the turntable, and disengagement blocks are provided on both sides of the turntable, the disengagement blocks are fixedly connected to the digester and abut against the end of the shift bar.

[0008] Preferably, a spray valve is fixedly connected to the top of the top plate, the output end of the spray valve passes through the top plate and is connected to the spray head, and the bottom of the lifting shaft is fixedly connected to gear 2, which is rotatably connected to the top plate, and gear rings are respectively engaged on both sides of gear 2, and the gear rings are fixedly connected to the outer wall of the inner sleeve.

[0009] Preferably, the bottom of the filter tube is connected to a through pipe, the end of the through pipe away from the filter tube is connected to a water valve, the output end of the water valve is connected to a hose, and the other end of the hose is connected to a water spray head.

[0010] Preferably, a side bucket is fixedly connected to the side wall of the digester, an electric push rod is fixedly installed on the outer wall of the side bucket, the output shaft of the electric push rod is fixedly connected to a sealing plate, the sealing plate is slidingly connected to the side bucket, and the top of the sealing plate is fixedly connected to an inclined wedge block.

[0011] Preferably, the outside of the water spray head is hinged with a connecting rod, the top of the connecting rod is hinged with a pull plate, the pull plate and the water spray head are both rotatably connected to the side bucket, and a spring three is sleeved and installed at the connection between the pull plate and the side bucket.

[0012] Preferably, the stirring shaft passes through the digester and is fixedly connected to conical wheel 1, a support rod is provided on the side of the conical wheel 1, the top of the support rod is rotatably connected to the side bucket, the top of the support rod is fixedly connected to conical wheel 2, and the conical wheel 1 is meshed with conical wheel 2.

[0013] Preferably, the bottom surface of the support rod is symmetrically provided with inclined surfaces, and one end of the pull plate abuts against the surface of the support rod.

[0014] Preferably, a process for preparing calcium hydroxide from quicklime using a dust treatment device comprises the following steps:

[0015] S1: When preparing calcium hydroxide, the driving motor is started to drive the stirring shaft to continuously stir the quicklime material in the digester. During the digestion reaction between quicklime and water, a large amount of heat is generated. Due to the violent reaction, some unreacted quicklime particles and generated calcium hydroxide particles will rise together with the water vapor to form dust. In order to prevent the dust from spreading to the outside, the spray valve and the fan are started at the same time. The spray valve sprays high-humidity water mist into the digester through the spray head. The high-humidity water mist contacts the dust and causes a sedimentation reaction, which performs preliminary treatment on the dust. When the fan is started, the dust is absorbed by the spoiler, so that the dust in contact with the high-humidity water mist is sucked away during the process of drifting and settling in the digester;

[0016] S2: When the stirring shaft rotates continuously for stirring, the driving mechanism is driven by the pulley group, so that the shifting bar drives the stopper to rotate, driving the turntable to rotate. The turntable rewinds the steel belt, causing the end of the steel belt connected to the lifting plate to move downward. When the shifting bar contacts the disconnecting block, the disconnected block resists outward, and the shifting bar compresses the spring, causing the turntable with the steel belt installed to return to its original position. After the shifting bar rotates and contacts the stopper again, it continues to drive the turntable to rotate, causing the lifting plate to perform a reciprocating up and down movement.

[0017] S3: When the lifting plate drives the top plate to move downward synchronously, the spring 2 is gradually compressed, and the lifting shaft moves downward. During this process, the lifting plate drives the rack to engage with the gear 1, so that the gear 1 drives the worm to rotate, thereby rotating the worm wheel, and making the lifting shaft rotate synchronously during the downward movement, thereby driving the gear 2 to rotate. The gear 2 engages with the two gear rings on both sides, so that the gear rings drive the inner sleeve to rotate, and drive the spoiler to rotate, so that the top plate can move downward, get closer to the dust, and improve the dust absorption effect. In the downward absorption process, the spoiler is driven to rotate, so that the dust circulation effect in the digester is good, which is convenient for improving the absorption efficiency. In addition, it drives the spray head to contact the dust below, so that the dust fall is more uniform.

[0018] S4: When the dust passes through the condenser tube, it flows into the filter tube after condensation, and the filtered wastewater enters the through pipe. After the initial digestion is completed, the electric push rod pushes the sealing plate outward to open the slag discharge port. The stirring shaft rotates continuously to discharge the unreacted slag remaining in the digester. At this time, the water valve is started to guide the wastewater in the through pipe into the hose. The stirring shaft drives the support rod to rotate continuously through the conical wheel 1 and the conical wheel 2. When the support rod rotates, the pull plate swings up and down continuously. Through the pull plate and the connecting rod, the water spray head at the bottom swings up and down synchronously to spray water on the slag, effectively controlling the diffusion of dust in the slag during the slag discharge process.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, when preparing calcium hydroxide, a high-humidity water mist is sprayed into the digester through a spray valve and a spray head. The high-humidity water mist contacts the dust, causing a sedimentation reaction, thereby preliminarily treating the dust. When the fan is started, the dust is absorbed by the spoiler, thereby improving the dust absorption efficiency.

[0021] 2. In the present invention, the lifting shaft rotates synchronously during the downward movement, thereby driving the second gear to rotate, causing the gear ring to drive the inner sleeve to rotate, driving the spoiler to rotate, so that the top plate can move downward, closer to the dust, and improve the dust absorption effect. In the downward absorption process, the spoiler is driven to rotate, so that the dust in the digester is well circulated, further improving the absorption efficiency. In addition, the spray head is driven close to the dust below, making the dust fall more uniform.

[0022] 3. In the present invention, after the initial digestion is completed, the unreacted slag remaining in the digester is discharged outward, and the water spray head at the bottom is synchronously swung up and down by the pull plate and the connecting rod to spray water on the slag, thereby effectively controlling the diffusion of dust in the slag during the slag discharge process, and the wastewater generated by dust suppression is reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-section structure of the digester and the protective box of the present invention;

[0025] Figure 3 Schematic diagram of the structure of the driving mechanism of the present invention;

[0026] Figure 4 Schematic diagram of the structure of the dust removal mechanism of the present invention;

[0027] Figure 5 Schematic diagram of the expanded structure of the inner sleeve, gear ring and lifting shaft of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the slag processing mechanism of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the hose and the sprinkler head of the present invention.

[0030] Figure: 1. Digester; 101. Slag outlet; 2. Drive motor; 3. Agitator shaft; 4. Pulley assembly; 5. Drive mechanism; 501. Rotating shaft; 502. Shifter bar; 503. Spring 1; 504. Turntable; 505. Stopper; 506. Steel belt; 507. Disconnection block; 6. Protective housing; 7. Dust removal mechanism; 701. Top plate; 702. Lifting plate; 703. Column; 704. Spring 2; 705. Worm gear; 706. Rack; 707. Gear 1; 708. Worm; 709. Lifting shaft; 710. Air blower machine; 711, filter tube; 712, condenser; 713, inner sleeve; 714, spray valve; 715, spray head; 716, gear 2; 717, gear ring; 718, spoiler; 8, slag handling mechanism; 801, through pipe; 802, water valve; 803, hose; 804, side bucket; 805, electric push rod; 806, sealing plate; 807, inclined wedge; 808, water spray head; 809, connecting rod; 810, pull plate; 811, spring 3; 812, conical wheel 1; 813, support rod; 814, conical wheel 2. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figures 1 to 7 The present invention provides a technical solution: comprising a digester 1, a slag discharge port 101, a drive motor 2 and a stirring shaft 3, and also comprising a pulley group 4 connected to the stirring shaft 3, a driving mechanism 5 is provided on the outer wall of one side of the digester 1, a protective box 6 is provided on the top of the digester 1, a dust removal mechanism 7 is provided in the protective box 6, and a slag processing mechanism 8 is provided on the side of the digester 1 opposite to the driving mechanism 5;

[0033] The dust removal mechanism 7 includes a top plate 701, which is slidably connected to the digester 1. A lifting plate 702 is fixedly connected to one side of the top of the top plate 701. One end of the lifting plate 702 is fixedly connected to the steel belt 506. A column 703 is fixedly connected to the connection between the top plate 701 and the digester 1. A spring 2 704 is sleeved on the column 703. A worm gear 705 is rotatably connected to the top of the column 703. A rack 706 is fixedly connected to the side of the lifting plate 702. A gear 1 707 is meshed with the bottom of the rack 706. A worm 708 is fixedly connected to the side of the gear 1 707. The worm 708 is rotatably connected to the protective box 6. A lifting shaft 709 is movably sleeved inside the column 703.

[0034] A fan 710 is fixedly installed on the top of the protective box 6. The input end of the fan 710 is connected to a filter tube 711. The filter tube 711 connects the inside and outside of the protective box 6. One end of the filter tube 711 located inside the protective box 6 is connected to a condenser tube 712. The bottom of the condenser tube 712 is sleeved with an inner sleeve 713. The bottom end of the inner sleeve 713 is fixedly connected to a spoiler 718.

[0035] The driving mechanism 5 includes a rotating shaft 501 connected to one end of the pulley group 4, a strip 502 is slidably connected to the rotating shaft 501, a spring 503 is sleeved and installed on the rotating shaft 501 between the strip 502 and the pulley group 4, the other end of the rotating shaft 501 is rotatably connected to a turntable 504, the turntable 504 is rotatably connected to the digester 1, and blocks 505 are symmetrically provided on the surface of the turntable 504, the blocks 505 abut against the strip 502, a steel belt 506 is wound around the turntable 504, and disconnection blocks 507 are provided on both sides of the turntable 504, the disconnection blocks 507 are fixedly connected to the digester 1 and abut against the end of the strip 502;

[0036] A spray valve 714 is fixedly connected to the top of the top plate 701. The output end of the spray valve 714 passes through the top plate 701 and is connected to the spray head 715. A second gear 716 is fixedly connected to the bottom of the lifting shaft 709. The second gear 716 is rotatably connected to the top plate 701. Gear rings 717 are respectively engaged on both sides of the second gear 716. The gear rings 717 are fixedly connected to the outer wall of the inner sleeve 713.

[0037] In this embodiment, when quicklime is added to the digester 1, the reaction will be vigorous due to the stability of the reaction water. Some unreacted quicklime particles and generated calcium hydroxide particles will be carried out of the reaction vessel along with the water vapor, forming dust. In addition, if the process parameters of the digestion reaction are not properly controlled, such as if the water addition rate is too fast or the mixing of quicklime and water is uneven, the reaction will be incomplete and unreacted quicklime particles will also be present in the reaction product in the form of dust.

[0038] In this embodiment, the spray head 715 sprays a large amount of water mist into the dust-laden airflow. The dust is fully wetted after being in contact with the water mist and gradually settles downward. However, due to the continuous occurrence of the digestion reaction, the dust cannot be fully settled.

[0039] In this embodiment, a filter screen is provided at the bottom of the filter tube 711 to filter solid dust and liquid. A filter screen is provided at the output side of the fan 710 to collect and process dust.

[0040] In this embodiment, the lifting shaft 709 and the rotating shaft 501 are both provided with limiting grooves for limiting the rotation of the shift bar 502 and the worm gear 705;

[0041] Example 2:

[0042] The bottom of the filter tube 711 is connected to a through pipe 801. The end of the through pipe 801 away from the filter tube 711 is connected to a water valve 802. The output end of the water valve 802 is connected to a hose 803. The other end of the hose 803 is connected to a water spray head 808.

[0043] A side bucket 804 is fixedly connected to the side wall of the digester 1, and an electric push rod 805 is fixedly installed on the outer wall of the side bucket 804. The output shaft of the electric push rod 805 is fixedly connected to a sealing plate 806. The sealing plate 806 is slidably connected to the side bucket 804, and an inclined wedge block 807 is fixedly connected to the top of the sealing plate 806;

[0044] The outside of the water spray head 808 is hinged with a connecting rod 809, and the top of the connecting rod 809 is hinged with a pull plate 810. The pull plate 810 and the water spray head 808 are both rotatably connected to the side bucket 804. A spring 811 is installed at the connection between the pull plate 810 and the side bucket 804.

[0045] The stirring shaft 3 passes through the digester 1 and is fixedly connected to a conical wheel 1 812. A support rod 813 is provided on the side of the conical wheel 1 812. The top of the support rod 813 is rotatably connected to the side bucket 804. The top of the support rod 813 is fixedly connected to a conical wheel 2 814. The conical wheel 1 812 and the conical wheel 2 814 are meshed.

[0046] The bottom surface of the support rod 813 is symmetrically provided with inclined surfaces, and one end of the pull plate 810 abuts against the surface of the support rod 813;

[0047] In this embodiment, during the digestion process, quicklime reacts with water to generate calcium hydroxide. Since quicklime may contain some calcium carbonate impurities, these calcium carbonates do not react during the digestion process and will remain as part of the slag. When directly discharged from the digester 1, the particles are small, which will cause dust to spread.

[0048] The use method and advantages of the present invention: The process of the dust treatment device for preparing calcium hydroxide from quicklime is as follows:

[0049] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown:

[0050] S1: When preparing calcium hydroxide, the driving motor 2 is started to drive the stirring shaft 3 to continuously stir the quicklime material in the digester 1. During the digestion reaction between quicklime and water, a large amount of heat is generated. Due to the violent reaction, some unreacted quicklime particles and generated calcium hydroxide particles will rise together with the water vapor to form dust. In order to prevent the dust from spreading to the outside, the spray valve 714 and the fan 710 are started at the same time. The spray valve 714 sprays high-humidity water mist into the digester 1 through the spray head 715. The high-humidity water mist contacts the dust and a sedimentation reaction occurs, thereby performing preliminary treatment on the dust. When the fan 710 is started, the dust is absorbed by the spoiler 718, so that the dust in contact with the high-humidity water mist is sucked away during the process of floating and settling in the digester 1;

[0051] S2: When the stirring shaft 3 rotates continuously for stirring, the driving mechanism 5 is driven to work through the pulley group 4, so that the shift bar 502 drives the stopper 505 to rotate, driving the turntable 504 to rotate, and the turntable 504 rewinds the steel belt 506, so that the end of the steel belt 506 connected to the lifting plate 702 moves downward. When the shift bar 502 contacts the disconnecting block 507, the disconnected block 507 resists outward, and the shift bar 502 compresses the spring 1 503, so that the turntable 504 equipped with the steel belt 506 returns to its original position. After the shift bar 502 rotates and contacts the stopper 505 again, it continues to drive the turntable 504 to rotate, so that the lifting plate 702 performs a reciprocating lifting and lowering motion.

[0052] S3: When the lifting plate 702 drives the top plate 701 to move downward synchronously, the spring 2 704 is gradually compressed, and the lifting shaft 709 moves downward. During the process, the lifting plate 702 drives the rack 706 to mesh with the gear 1 707, so that the gear 1 707 drives the worm 708 to rotate, thereby rotating the worm gear 705, and causing the lifting shaft 709 to rotate synchronously during the downward movement, thereby driving the gear 2 716 to rotate. The gear 2 716 meshes with the two gear rings 717 on both sides, so that the gear rings 717 drive the inner sleeve 713 to rotate, and drive the spoiler 718 to rotate, so that the top plate 701 can move downward, more closely contact the dust, and improve the dust absorption effect. In the downward absorption process, the spoiler 718 is driven to rotate, so that the dust circulation effect in the digester 1 is good, which is convenient for improving the absorption efficiency, and the spray head 715 is driven to contact the dust below, so that the dust fall is more uniform.

[0053] S4: When the dust passes through the condenser tube 712, it flows into the filter tube 711 after condensation, and the filtered wastewater enters the through pipe 801. After the preliminary digestion is completed, the electric push rod 805 pushes the sealing plate 806 outward to open the slag discharge port 101. The stirring shaft 3 rotates continuously to discharge the unreacted slag remaining in the digester 1. At this time, the water valve 802 is started to guide the wastewater in the through pipe 801 into the hose 803. The stirring shaft 3 drives the support rod 813 to rotate continuously through the conical wheel 1 812 and the conical wheel 2 814. When the support rod 813 rotates, the pull plate 810 swings up and down continuously. Through the pull plate 810 and the connecting rod 809, the water spray head 808 at the bottom swings up and down synchronously to spray water on the slag, effectively controlling the diffusion of dust in the slag during the slag discharge process.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust treatment device for preparing calcium hydroxide from quicklime, comprising a digester (1), a slag discharge port (101), a drive motor (2) and a stirring shaft (3), characterized in that: The digester (1) further comprises a pulley assembly (4) connected to the stirring shaft (3); a driving mechanism (5) is provided on an outer wall of one side of the digester (1); a protective box (6) is provided on the top of the digester (1); a dust removal mechanism (7) is provided in the protective box (6); and a slag processing mechanism (8) is provided on the side of the digester (1) opposite to the driving mechanism (5); The dust removal mechanism (7) includes a top plate (701), the top plate (701) is slidably connected to the digester (1), a lifting plate (702) is fixedly connected to one side of the top of the top plate (701), one end of the lifting plate (702) is fixedly connected to the steel belt (506), a column (703) is fixedly connected to the connection between the top plate (701) and the digester (1), and a spring (704) is sleeved and installed on the column (703). The top of the column (703) is rotatably connected to a worm gear (705), the side of the lifting plate (702) is fixedly connected to a rack (706), the bottom of the rack (706) is meshed with a gear 1 (707), the side of the gear 1 (707) is fixedly connected to a worm (708), the worm (708) is rotatably connected to the protective box (6), and the interior of the column (703) is movably sleeved with a lifting shaft (709); A fan (710) is fixedly installed on the top of the protective box (6); the input end of the fan (710) is connected to a filter tube (711); the filter tube (711) connects the inside and outside of the protective box (6); one end of the filter tube (711) located inside the protective box (6) is connected to a condenser tube (712); an inner sleeve (713) is sleeved on the bottom of the condenser tube (712); and a spoiler (718) is fixedly connected to the bottom end of the inner sleeve (713).

2. A dust treatment device for preparing calcium hydroxide from quicklime according to claim 1, characterized in that: The driving mechanism (5) includes a rotating shaft (501) connected to one end of the pulley group (4), a strip (502) being slidably connected to the rotating shaft (501), a spring (503) being sleeved and installed on the rotating shaft (501) between the strip (502) and the pulley group (4), a turntable (504) being rotatably connected to the other end of the rotating shaft (501), the turntable (504) being rotatably connected to the digester (1), a stopper (505) being symmetrically provided on the surface of the turntable (504), the stopper (505) being in contact with the strip (502), a steel belt (506) being wound around the turntable (504), and a disengagement block (507) being provided on both sides of the turntable (504), the disengagement block (507) being fixedly connected to the digester (1) and in contact with the end of the strip (502).

3. A dust treatment device for preparing calcium hydroxide from quicklime according to claim 1, characterized in that: The top of the top plate (701) is fixedly connected to a spray valve (714), the output end of the spray valve (714) passes through the top plate (701) and is connected to a spray head (715), the bottom of the lifting shaft (709) is fixedly connected to a second gear (716), the second gear (716) is rotatably connected to the top plate (701), and the two sides of the second gear (716) are respectively engaged with a gear ring (717), and the gear ring (717) is fixedly connected to the outer wall of the inner sleeve (713).

4. A dust treatment device for preparing calcium hydroxide from quicklime according to claim 1, characterized in that: The bottom of the filter tube (711) is connected to a through pipe (801), and one end of the through pipe (801) away from the connection with the filter tube (711) is connected to a water valve (802). The output end of the water valve (802) is connected to a hose (803), and the other end of the hose (803) is connected to a water spray head (808).

5. A dust treatment device for preparing calcium hydroxide from quicklime according to claim 1, characterized in that: A side bucket (804) is fixedly connected to the side wall of the digester (1), an electric push rod (805) is fixedly installed on the outer wall of the side bucket (804), the output shaft of the electric push rod (805) is fixedly connected to a sealing plate (806), the sealing plate (806) is slidably connected to the side bucket (804), and the top of the sealing plate (806) is fixedly connected to an inclined wedge block (807).

6. A dust treatment device for preparing calcium hydroxide from quicklime according to claim 4, characterized in that: The outside of the water spray head (808) is hinged with a connecting rod (809), the top of the connecting rod (809) is hinged with a pull plate (810), the pull plate (810) and the water spray head (808) are both rotatably connected to the side bucket (804), and a spring three (811) is installed at the connection between the pull plate (810) and the side bucket (804).

7. A dust treatment device for preparing calcium hydroxide from quicklime according to claim 1, characterized in that: The stirring shaft (3) passes through the digester (1) and is fixedly connected to a conical wheel 1 (812). A support rod (813) is provided on the side of the conical wheel 1 (812). The top of the support rod (813) is rotatably connected to the side bucket (804). The top of the support rod (813) is fixedly connected to a conical wheel 2 (814). The conical wheel 1 (812) is meshed with the conical wheel 2 (814).

8. A dust treatment device for preparing calcium hydroxide from quicklime according to claim 7, characterized in that: The bottom surface of the support rod (813) is symmetrically provided with inclined surfaces, and one end of the pull plate (810) abuts against the surface of the support rod (813).

9. The process for preparing calcium hydroxide from quicklime using a dust treatment device according to claim 1, wherein: The steps include: S1: When preparing calcium hydroxide, the driving motor (2) is started to drive the stirring shaft (3) to continuously stir the quicklime material in the digester (1). During the digestion reaction between the quicklime and water, a large amount of heat is generated. Due to the intense reaction, some unreacted quicklime particles and generated calcium hydroxide particles will rise together with the water vapor to form dust. In order to prevent the dust from spreading to the outside, the spray valve (714) and the fan (710) are started at the same time. The spray valve (714) sprays high-humidity water mist into the digester (1) through the spray head (715). The high-humidity water mist contacts the dust and causes a sedimentation reaction, thereby performing preliminary treatment on the dust. When the fan (710) is started, the dust is absorbed by the spoiler (718), so that the dust contacting the high-humidity water mist is drawn away during the process of drifting and settling in the digester (1); S2: When the stirring shaft (3) rotates continuously to stir, the driving mechanism (5) is driven to work through the pulley group (4), so that the shifting bar (502) drives the stopper (505) to rotate, driving the turntable (504) to rotate, and the turntable (504) rewinds the steel belt (506), so that the end of the steel belt (506) connected to the lifting plate (702) moves downward, and when the shifting bar (502) contacts the disconnecting block (507), the disconnected block (507) resists outward, and the shifting bar (502) compresses the spring 1 (503), so that the turntable (504) equipped with the steel belt (506) returns to its original position, and after the shifting bar (502) rotates and contacts the stopper (505) again, it continues to drive the turntable (504) to rotate, so that the lifting plate (702) performs a reciprocating lifting and lowering motion; S3: When the lifting plate (702) drives the top plate (701) to move downward synchronously, the spring 2 (704) is gradually compressed, and the lifting shaft (709) moves downward. During the process, the lifting plate (702) drives the rack (706) to engage with the gear 1 (707), so that the gear 1 (707) drives the worm (708) to rotate, thereby rotating the worm wheel (705), and causing the lifting shaft (709) to rotate synchronously during the downward movement, thereby driving the gear 2 (716) to rotate, and the gear 2 (716) ) by meshing with the two toothed rings (717) on both sides, so that the toothed rings (717) drive the inner sleeve (713) to rotate, drive the spoiler (718) to rotate, and enable the top plate (701) to move downward, to be in closer contact with the dust, thereby improving the dust absorption effect. In addition, during the downward absorption process, the spoiler (718) is driven to rotate, so that the dust in the digester (1) has a good circulation effect, which is convenient for improving the absorption efficiency. In addition, the spray head (715) is driven to contact the dust below, so that the dust is evenly reduced. S4: When the dust passes through the condenser tube (712), it is condensed and flows into the filter tube (711), and the filtered wastewater enters the through pipe (801). After the initial digestion is completed, the electric push rod (805) pushes the sealing plate (806) outward to open the slag discharge port (101). The stirring shaft (3) continues to rotate, so that the unreacted slag remaining in the digester (1) is discharged outward. At this time, the water valve (802) is started to open the through pipe (801). The waste water in the mixing bowl is introduced into the hose (803), and the stirring shaft (3) drives the support rod (813) to rotate continuously through the conical wheel 1 (812) and the conical wheel 2 (814). When the support rod (813) rotates, the pull plate (810) is continuously swung up and down. Through the pull plate (810) and the connecting rod (809), the water spray head (808) at the bottom is synchronously swung up and down to spray water on the slag, effectively controlling the diffusion of dust in the slag during the slag discharge process.

Images