A kind of digestion process of calcium carbonate

Abstract

The present invention discloses a digestion process of calcium carbonate, which specifically includes the following steps: S1, material preparation; S2, intermittent digestion treatment; S3, heat exchange accelerated digestion treatment; S4, flue gas treatment; the present invention relates to the technical field of lime digestion processing. The digestion process of calcium carbonate realizes the purpose of automatically and intermittently conveying lime from the hopper to the digestion component through the coordinated arrangement of a driving component, an intermittent feeding component, a hopper and a digestion component, while reducing the amount of flue gas generated, the circulation of water in the digestion component can also be realized during the process to ensure full contact between lime and water, and the arrangement of a heat exchange flow channel and an acceleration component is coordinated, and the heat exchange liquid is utilized to unidirectionally circulate between the heat exchange flow channel and the acceleration component to realize the absorption of heat generated by the reaction of lime and water, and at the same time, the heat exchange fins can be driven to rotate the heat exchange cylinder, so as to further improve the reaction speed of lime and water, and provide efficient guarantee for the digestion of calcium carbonate.

Description

Technical Field

[0001] The invention relates to the technical field of lime digestion and processing, in particular to a digestion process of calcium carbonate. Background Art

[0002] The digestion process of calcium carbonate is a process in which limestone is used as raw material, calcined to generate lime (calcium oxide), and then the lime is reacted with water to generate calcium hydroxide (lime milk). The existing calcium carbonate digestion cylinder is mainly composed of a power device, a filter screen, a roller, a cylinder (an outer cylinder and an inner cylinder), a gear ring, a supporting wheel device, etc. The cylinder is divided into four zones, namely a buffer zone, a digestion zone, a homogenization zone, and a milk-slag separation zone. A slag removal and discharge device is provided at the tail. Its main feature is that a method of digesting lime by rotary motion instead of stirring is adopted. The lime is stirred by itself under the action of the low-speed rotation of the cylinder and the lifting plate. This type of cylinder lacks a smoke exhaust filtration mechanism, and the smoke generated by the reaction of lime and water is diffused, seriously polluting the environment.

[0003] As described in application number 202023228318.5, a digestion machine for calcium carbonate production with high digestion efficiency can make the fan barrel rotate with the rotation of the stirring shaft through the smoke exhaust filter component, thereby facilitating the staff to exhaust the smoke generated during the material digestion process and reducing the difficulty of smoke exhaust for the staff.

[0004] Based on the search of the above information, it can be seen that although the smoke removal treatment is achieved, a large amount of smoke is easily generated instantly because the amount of lime added to the water cannot be effectively controlled. The smoke is usually composed of water and calcium hydroxide. The direct removal of the smoke can easily lead to waste of materials. A large amount of heat will be generated after the contact between lime and water, and the heat cannot be effectively utilized, resulting in energy waste. For this reason, a calcium carbonate digestion process is proposed, which uses automatic intermittent feeding control of lime to avoid the instantaneous generation of a large amount of smoke. At the same time, it can also use a cyclic digestion method to ensure high-efficiency digestion, and can also provide further acceleration guarantee for the mixing of lime and water while realizing heat utilization. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a digestion process for calcium carbonate, which solves the problems mentioned in the above background technology.

[0006] To achieve the above object, the present invention is implemented by the following technical scheme: a digestion process of calcium carbonate, specifically comprising the following steps:

[0007] S1. Material preparation: Place the qualified lime in the hopper, inject water into the digestion component, and inject heat exchange liquid into the heat exchange channel;

[0008] S2, intermittent digestion treatment: start the driving component, the driving component drives the water in the digestion component to circulate, during which the driving component transports the lime in the hopper to the digestion component through the intermittent feeding component, so that the water and lime are digested in the digestion component;

[0009] S3, heat exchange accelerated digestion treatment: after the driving component is started in S2, the driving component also drives the heat exchange liquid to circulate unidirectionally between the heat exchange flow channel and the two digestion components through the acceleration component. The circulating heat exchange liquid drives the moving end of the driving component to rotate, thereby accelerating the digestion speed of water and lime.

[0010] S4. Flue gas treatment: The flue gas generated in the digestion component flows to the flue gas treatment component and is discharged after being filtered.

[0011] The present invention is further configured as follows: the digestion components are provided with two groups, and the two groups of digestion components both include a digestion box, a groove is provided on the top of the digestion box, a material box is fixedly installed on one side of the inner cavity of the groove, a heat exchange cylinder is connected and rotatably installed between the material box and the other side of the inner cavity of the groove, a plurality of heat exchange fins are fixedly installed at uniform intervals on the outer circumference of the heat exchange cylinder, a plurality of spiral sheets are also fixedly installed at uniform intervals inside the heat exchange cylinder, the inner cavity of the digestion box includes a large chamber, a flat chamber and a small chamber that are connected in sequence, and the material box and the small chamber are connected through an opening;

[0012] A mesh plate with holes is fixedly installed inside the large chamber and below the heat exchange cylinder, a piston plate is arranged at the bottom of the mesh plate with holes, and a plurality of ejector pins matching the mesh plate with holes are fixedly installed on the top of the piston plate;

[0013] Positioning plates are fixedly installed on both sides of the inner cavity of the large chamber, and the positioning plates are arranged below the notched piston plate. A plurality of sliding rods are penetrated and slidably installed on the top of the positioning plate, and an L-shaped plate is fixedly installed on the top of the plurality of sliding rods on the same positioning plate. A spring is also sleeved on the outer periphery of the sliding rod, and the two ends of the spring are respectively in contact with the top of the inner cavity of the L-shaped plate and the top of the positioning plate;

[0014] One side of the L-shaped plate is in sliding contact with one side of the inner cavity of the large chamber, and flow ports are provided on both sides of the piston plate and directly above the L-shaped plate;

[0015] One side of the digestion box is connected with a feeding pipe with a valve and a discharging pipe with a valve in sequence from top to bottom.

[0016] The present invention is further configured as follows: the driving assembly comprises a driving motor, the output end of the driving motor is fixedly mounted with a reciprocating screw via a coupling, and the outer periphery of the reciprocating screw is sleeved with a lifting frame used in conjunction therewith;

[0017] At least two plug rods are fixedly installed on both sides of the bottom of the lifting frame, and the bottom ends of the two plug rods penetrate the digestion box and the perforated mesh plate and are fixedly connected to the top of the piston plate.

[0018] The present invention is further configured as follows: a support base is fixedly installed at the bottom of the digestion boxes, and the drive motor is arranged between the two digestion boxes and fixedly installed at the top middle of the support base;

[0019] The heat exchange flow channel includes two semicircular groove parts, the two ends of one semicircular groove part are respectively connected to the rear ends of the two grooves, and the two ends of the other semicircular groove part are respectively connected to the front ends of the two grooves, and the bottoms of the two semicircular groove parts are fixedly connected to the top of the support base through an expansion plate.

[0020] The present invention is further configured as follows: the acceleration component includes a driving gear, two transfer gears and two pinion gears, the driving gear is respectively meshed with the two transfer gears, the transfer gear is meshed with the pinion gears, and the diameters of the driving gear, the transfer gear and the pinion gear are successively reduced, a water pump is installed at the bottom of the inner cavity of the semicircular groove part, the bottom of the pinion gear is fixedly connected to the rotating shaft of the water pump through a connecting rod, a vertical pole is rotatably installed at the bottom of the transfer gear through a bearing, the bottom end of the vertical pole is fixedly connected to the top of the support base, and the driving gear is fixedly installed on the top of the reciprocating screw.

[0021] The present invention is further configured as follows: two hoppers and two intermittent feeding assemblies are provided, and the two hoppers are respectively fixedly mounted on the tops of the two digestion boxes;

[0022] The intermittent feeding assembly includes a push plate, a rotating block on one side of the push plate is rotatably installed with a linkage plate, one side of the linkage plate is rotatably connected to one side of the lifting frame through a rotating block, two material plates are fixedly installed on one side of the push plate, one side of the hopper is provided with a slot matched with the material plate, the bottom of the inner cavity of the hopper is also provided with two drop-out ports connected with the slots, the top of the material plate is provided with a transfer port matched with the drop-out port, the bottom of the hopper is also provided with a discharge port matched with the transfer port, and the bottom of the hopper is connected with the interior of the material box through a feeding pipe.

[0023] The present invention is further configured as follows: the flue gas treatment component includes a treatment box, both sides of the treatment box are connected to two flue gas return pipes, two filter screens are also fixedly installed inside the treatment box, the two flue gas return pipes are respectively arranged on the opposite sides of the two filter screens, a first rotating shaft is fixedly installed on the top of the driving gear, the top of the first rotating shaft passes through the treatment box, and a first turntable is fixedly installed, a first eccentric shaft is fixedly installed on the top of the first turntable, the outer periphery of the first eccentric shaft is sleeved with a square frame, the front and rear sides of the square frame are respectively in sliding contact with the opposite sides of the two filter screens, and sponge plates are fixedly installed on both sides of the square frame, and a smoke exhaust pipe is also connected to the middle of the top of the treatment box.

[0024] The present invention is further configured as follows: a second rotating shaft is fixedly installed on the top of the transfer gear, the top end of the second rotating shaft passes through the processing box and is fixedly installed with a second turntable, a second eccentric shaft is fixedly installed on the top of the second turntable, and a cleaning frame is provided on the outer periphery of the first eccentric shaft, and the front and rear sides of the cleaning frame are respectively in sliding contact with the filter screen and one side of the inner cavity of the processing box.

[0025] The present invention is further configured as follows: one end of the two smoke return pipes are connected and fixed to the top of the digestion box, and L-shaped brackets are fixedly installed on the front and rear sides of the top of the digestion box, and one side of the L-shaped bracket is fixedly connected to one side of the treatment box.

[0026] The present invention is further configured as follows: an outer arc surface of one of the semicircular groove parts is sequentially connected with a water supply pipe with a valve and a water outlet pipe with a valve from top to bottom.

[0027] The present invention provides a calcium carbonate digestion process, which has the following beneficial effects:

[0028] (1) The present invention realizes the purpose of automatically and intermittently conveying lime from the hopper to the digestion component through the coordinated arrangement of the driving component, the intermittent feeding component, the hopper and the digestion component, while reducing the amount of smoke generated. At the same time, the circulation of water in the digestion component can be realized during the process to ensure sufficient contact between lime and water. In conjunction with the arrangement of the heat exchange flow channel and the acceleration component, the one-way circulation flow of the heat exchange liquid between the heat exchange flow channel and the acceleration component is utilized to realize the absorption of the heat generated by the reaction of lime and water. At the same time, the heat exchange fins can also be driven to rotate the heat exchange cylinder, thereby further increasing the reaction speed of lime and water, providing efficient guarantee for the digestion of calcium carbonate.

[0029] (2) The present invention arranges a driving component, an accelerating component and a flue gas treatment component. The flue gas generated when lime reacts with water flows into the treatment box through the flue gas reflux pipe. After the calcium hydroxide in the flue gas is filtered out by the filter, the moisture in the flue gas is absorbed by the sponge board, and part of the flue gas is discharged from the exhaust pipe, thereby reducing the exhaust volume and material loss. At the same time, through the intermittent squeezing of the sponge board, the squeezed water passes through the filter and flows back to the digestion box through the flue gas reflux pipe. The filter is continuously cleaned by the cleaning frame, thereby realizing the automatic cleaning and recovery of the filtered calcium hydroxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the digestion component of the present invention;

[0032] Figure 3 It is a schematic diagram of the connection of the perforated mesh plate, the piston plate, the ejector pin, the positioning plate, the slide rod, the L-shaped plate, the spring, the flow port and the plug structure of the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the heat exchange cylinder, heat exchange fins and spiral blades of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the driving assembly of the present invention;

[0035] Figure 6 It is a schematic diagram of the connection between the digestion component and the heat exchange flow channel structure of the present invention;

[0036] Figure 7 It is a schematic diagram of the connection of the heat exchange flow channel, the drive assembly and the acceleration assembly structure of the present invention;

[0037] Figure 8 It is a structural schematic diagram of the support base of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of the flue gas treatment component of the present invention;

[0039] Fig.10 It is a schematic diagram of the internal structure of the processing box of the present invention;

[0040] Fig.11 It is a cross-sectional view of the processing box structure of the present invention;

[0041] Fig.12 It is a schematic diagram of the connection between the hopper and the intermittent feeding assembly structure of the present invention;

[0042] Fig.13 It is a schematic diagram of the connection between the hopper and the L-shaped bracket structure of the present invention.

[0043] In the figure:

[0044] 1. Hopper;

[0045] 2. Digestion assembly; 2001. Digestion box; 20011. Large chamber; 20012. Flat chamber; 20013. Small chamber; 2002. Groove; 2003. Material box; 2004. Heat exchange cylinder; 2005. Heat exchange fins; 2006. Spiral sheet; 2007. Perforated mesh plate; 2008. Piston plate; 2009. Ejector pin; 2010. Positioning plate; 2011. Sliding rod; 2012. L-shaped plate; 2013. Spring; 2014. Flow port; 2015. Feeding pipe with valve; 2016. Discharging pipe with valve;

[0046] 3. Heat exchange flow channel; 301. Semicircular groove; 302. Water supply pipe with valve; 303. Water outlet pipe with valve;

[0047] 4. Driving assembly; 401. Driving motor; 402. Reciprocating screw; 403. Lifting frame; 404. Inserting rod;

[0048] 5. Intermittent feeding assembly; 501. Push plate; 502. Linkage plate; 503. Material plate; 504. Slot; 505. Dropping port; 506. Transfer port; 507. Dropping port; 508. Feeding pipe;

[0049] 6. Acceleration assembly; 601. Driving gear; 602. Transfer gear; 603. Pinion; 604. Water pump; 605. Connecting rod; 606. Vertical rod;

[0050] 7. Smoke treatment assembly; 7001. Treatment box; 7002. Smoke return pipe; 7003. Filter; 7004. First rotating shaft; 7005. First rotating disk; 7006. First eccentric shaft; 7007. Frame; 7008. Sponge board; 7009. Smoke exhaust pipe; 7010. Second rotating shaft; 7011. Second rotating disk; 7012. Second eccentric shaft; 7013. Cleaning frame; 7014. L-shaped bracket;

[0051] 8. Support base. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0053] See also Figure 1-13 , the embodiment of the present invention provides the following technical solutions:

[0054] Embodiment 1

[0055] A calcium carbonate digestion process comprises two hoppers 1, two digestion components 2, a heat exchange flow channel 3, a drive component 4, two groups of intermittent feeding components 5 and an acceleration component 6.

[0056] As a preferred embodiment, the two groups of digestion components 2 both include a digestion box 2001, one side of the digestion box 2001 is connected with a valved feeding pipe 2015 and a valved discharge pipe 2016 in sequence from top to bottom, and a support base 8 is fixedly installed at the bottom of the two digestion boxes 2001. In order to facilitate the use of heat generated during the reaction of lime and water, a groove 2002 is opened on the top of the digestion box 2001. In order to facilitate the loading of lime, a material box 2003 is fixedly installed on one side of the inner cavity of the groove 2002, and the top of the material box 2003 is connected to the feeding pipe 5. 08. Lime is added into the material box 2003 through the feeding pipe 508. The material box 2003 and the other side of the inner cavity of the groove 2002 are connected and a heat exchange tube 2004 is rotatably installed. A plurality of heat exchange fins 2005 are evenly fixedly installed on the outer periphery of the heat exchange tube 2004. A plurality of spiral sheets 2006 are also evenly fixedly installed inside the heat exchange tube 2004. In this way, when a unidirectional flow of heat exchange liquid appears in the groove 2002, not only heat exchange can be achieved, but also the heat exchange tube 2004 can be driven to rotate to accelerate the digestion process.

[0057] It is further explained that in order to ensure the circulation of water, the inner cavity of the digestion box 2001 includes a large chamber 20011, a flat chamber 20012 and a small chamber 20013 which are connected in sequence. The material box 2003 and the small chamber 20013 are connected through an opening. A perforated mesh plate 2007 is fixedly installed inside the large chamber 20011 and below the heat exchange cylinder 2004. A piston plate 2008 is provided at the bottom of the perforated mesh plate 2007. A plurality of ejectors 2009 adapted to the perforated mesh plate 2007 are also fixedly installed on the top of the piston plate 2008. In this way, in the process of the piston plate 2008 moving up and down, the large pieces of lime on the perforated mesh plate 2007 can be pushed by the ejectors 2009 to avoid the perforated mesh plate 2007 from being blocked. In order to ensure that the piston plate 2008 can push the digestion box 2001 when it moves downward. In order to ensure the directional flow of water and ensure the smooth fall of the lime milk on the perforated mesh plate 2007 when the piston plate 2008 moves upward, flow ports 2014 are opened on both sides of the piston plate 2008 and directly above the L-shaped plate 2012, and positioning plates 2010 are fixedly installed on both sides of the inner cavity of the large chamber 20011, and the positioning plate 2010 is arranged below the notched piston plate 2008. A plurality of slide bars 2011 are penetrated and slidably installed on the top of the positioning plate 2010, and the tops of the plurality of slide bars 2011 on the same positioning plate 2010 are fixedly installed with the L-shaped plate 2012 together. The outer periphery of the slide bar 2011 is also sleeved with a spring 2013, and the two ends of the spring 2013 are respectively in contact with the top of the inner cavity of the L-shaped plate 2012 and the top of the positioning plate 2010, and one side of the L-shaped plate 2012 is in sliding contact with one side of the inner cavity of the large chamber 20011.

[0058] As a preferred solution, in order to realize the up and down reciprocating drive of the piston plate 2008, the driving assembly 4 includes a driving motor 401, which is arranged between the two digestion boxes 2001 and fixedly installed in the top middle part of the support base 8. The driving motor 401 is electrically connected to the external power supply and is controlled by a control switch. A reciprocating screw 402 is fixedly installed on the output end of the driving motor 401 through a coupling. The outer periphery of the reciprocating screw 402 is provided with a lifting frame 403 for matching use. At least two plug rods 404 are fixedly installed on both sides of the bottom of the lifting frame 403. The bottom ends of the two plug rods 404 penetrate the digestion box 2001 and the perforated mesh plate 2007, and are fixedly connected to the top of the piston plate 2008.

[0059] As a preferred solution, in order to provide a circulation flow channel for the heat exchange liquid and facilitate the rotational drive of the heat exchange cylinder 2004 and the absorption of heat generated during the digestion process, the heat exchange flow channel 3 includes two semicircular groove parts 301, and the outer arc surface of one semicircular groove part 301 is connected with a valved water supply pipe 302 and a valved water outlet pipe 303 from top to bottom in sequence, and the two ends of one semicircular groove part 301 are respectively connected to the rear ends of the two grooves 2002, and the two ends of the other semicircular groove part 301 are respectively connected to the front ends of the two grooves 2002, and the bottoms of the two semicircular groove parts 301 are fixedly connected to the top of the support base 8 through an expansion plate.

[0060] As a preferred solution, in order to achieve unidirectional circulation of the heat exchange liquid, the acceleration component 6 includes a driving gear 601, two transfer gears 602 and two pinion gears 603. The driving gear 601 is respectively meshed with the two transfer gears 602, and the transfer gear 602 is meshed with the pinion gear 603. The diameters of the driving gear 601, the transfer gear 602 and the pinion gear 603 are successively reduced. A water pump 604 is installed at the bottom of the inner cavity of the semicircular groove part 301. The bottom of the pinion gear 603 is fixedly connected to the rotating shaft of the water pump 604 through a connecting rod 605. The bottom of the transfer gear 602 is rotatably installed with a vertical rod 606 through a bearing. The bottom end of the vertical rod 606 is fixedly connected to the top of the support base 8, and the driving gear 601 is fixedly installed on the top of the reciprocating screw 402.

[0061] As detailed in the attached Figure 6 As shown, both water pumps 604 are provided with a water inlet and a water outlet, and the water inlets and water outlets of the two water pumps 604 are rotationally symmetrically arranged to ensure that the heat exchange liquid can circulate unidirectionally in the flow channel formed by the two semicircular grooves 301 and the two grooves 2002.

[0062] As a preferred solution, in order to realize automatic feeding to the gap in the upper material pipe 508 to reduce the amount of smoke generated, the intermittent feeding component 5 includes a push plate 501, and a rotating block on one side of the push plate 501 is rotatably installed with a linkage plate 502, and one side of the linkage plate 502 is rotatably connected to one side of the lifting frame 403 through a rotating block. Two material plates 503 are fixedly installed on one side of the push plate 501, and two hoppers 1 are respectively fixedly installed on the top of the two digestion boxes 2001. A slot 504 adapted to the material plate 503 is provided on one side of the hopper 1, and two drop ports 505 connected to the slots 504 are also provided at the bottom of the inner cavity of the hopper 1. A transfer port 506 adapted to the drop port 505 is provided on the top of the material plate 503, and a discharge port 507 adapted to the transfer port 506 is provided at the bottom of the hopper 1. The bottom of the hopper 1 is connected to the interior of the material box 2003 through a feeding pipe 508.

[0063] In this embodiment, not only can the automatic intermittent feeding of lime be realized, but also the circulation drive of water can be realized, so as to ensure the efficient implementation of the digestion process while reducing the loss of materials. Moreover, while realizing the absorption and conversion of the heat generated in the digestion process, the heat exchange cylinder 2004 can be driven to rotate by the unidirectional circulation flow, thereby further improving the digestion efficiency.

[0064] Embodiment 2

[0065] As an improvement of the previous embodiment, this embodiment is a calcium carbonate digestion process, which also includes a flue gas treatment component 7. The flue gas treatment component 7 includes a treatment box 7001. Two flue gas return pipes 7002 are connected to both sides of the treatment box 7001. One end of the two flue gas return pipes 7002 is connected and fixed to the top of the digestion box 2001. L-shaped brackets 7014 are fixedly installed on the front and back sides of the top of the digestion box 2001. One side of the L-shaped bracket 7014 is fixedly connected to one side of the treatment box 7001. Two filters 7003 are also fixedly installed inside the treatment box 7001. The two flue gas return pipes 7002 are respectively arranged on the opposite sides of the two filters 7003. It is further explained that in order to realize the absorption and treatment of water vapor in the flue gas to reduce the exhaust volume, a first rotating shaft 7004 is fixedly installed on the top of the driving gear 601. The top of the first rotating shaft 7004 passes through the treatment box 7001 and is fixedly installed with a first turntable 7005. , a first eccentric shaft 7006 is fixedly installed on the top of the first rotating disk 7005, and a square frame 7007 is sleeved on the outer periphery of the first eccentric shaft 7006. The front and rear sides of the square frame 7007 are respectively in sliding contact with the opposite sides of the two filter screens 7003, and sponge plates 7008 are fixedly installed on both sides of the square frame 7007. The middle part of the top of the processing box 7001 is also connected to a smoke exhaust pipe 7009. Further explanation, in order to realize the cleaning of the filter screen 7003, avoid the filter screen 7003 is blocked, a second rotating shaft 7010 is fixedly installed on the top of the transfer gear 602, the top of the second rotating shaft 7010 passes through the processing box 7001, and a second turntable 7011 is fixedly installed, a second eccentric shaft 7012 is fixedly installed on the top of the second turntable 7011, and a cleaning frame 7013 is provided on the outer periphery of the first eccentric shaft 7006, and the front and rear sides of the cleaning frame 7013 are in sliding contact with the filter screen 7003 and one side of the inner cavity of the processing box 7001 respectively.

[0066] As a preferred solution, in order to ensure stable assembly of the hopper 1 , a reinforcement plate is welded and fixed between the two L-shaped brackets 7014 arranged on the same side, and the bottom of the reinforcement plate is welded and fixed to the top of the hopper 1 .

[0067] The advantage of the second embodiment over the first embodiment is that it can also filter the flue gas, and the calcium hydroxide filtered by the filter 7003 can be transported to the flue gas reflux pipe 7002 through the water squeezed out of the sponge board 7008, so that it flows back to the digestion box 2001, further reducing the loss of materials.

[0068] The specific digestion process is as follows:

[0069] S1, material preparation: Place the screened qualified lime in the hopper 1, inject water into the digestion box 2001 through the valved feeding pipe 2015, and inject heat exchange liquid into the semicircular groove 301 through the valved water feeding pipe 302, wherein the heat exchange liquid includes but is not limited to water;

[0070] S2, intermittent digestion treatment: start the drive motor 401, the drive motor 401 drives the reciprocating screw 402 to rotate, and the reciprocating screw 402 drives the lifting frame 403 to move up and down.

[0071] When the lifting frame 403 drives the linkage plate 502 to move downward, the lime in the hopper 1 passes through the drop port 505 and falls into the transfer port 506. The linkage plate 502 pushes the push plate 501 to move the material plate 503 in the slot 504. When the material plate 503 drives the lime to move to the drop port 507, the lime passes through the feeding pipe 508 and falls into the material box 2003. During this process, the lifting frame 403 drives the plunger 404 to move the piston plate 2008 downward. When the piston plate 2008 contacts and is pressed against the L-shaped plate 212, the piston plate 2008 is pressed against the L-shaped plate 212. When squeezing occurs, the water in the digestion box 2001 is driven by the piston plate 2008 and the two L-shaped plates 2012, passes through the large chamber 20011, the flat chamber 20012 and the small chamber 20013 in sequence, and enters the material box 2003, and reacts with the lime in the material box 2003 to produce lime milk, which flows to the perforated mesh plate 2007 through the heat exchange cylinder 2004 and falls on the piston plate 2008. During the process, the L-shaped plate 2012 squeezes the spring 2013 downward.

[0072] When the lifting frame 403 drives the linkage plate 502 to move upward, the linkage plate 502 pulls the push plate 501 to move the material plate 503 in the slot 504. When the transfer port 506 on the material plate 503 moves to the drop port 505, the lime in the hopper 1 falls into the transfer port 506. During the process, the lifting frame 403 drives the insertion rod 404 to move the piston plate 2008 upward, and the spring 2013 is reset. After the piston plate 2008 is separated from the L-shaped plate 2012, the lime milk falling on the piston plate 2008 flows to the bottom of the piston plate 2008 through the flow port 2014.

[0073] S3, heat exchange accelerated digestion treatment: In S2, during the rotation of the reciprocating screw 402, the reciprocating screw 402 drives the driving gear 601 to rotate, the driving gear 601 drives the two transfer gears 602 to accelerate the rotation, the two transfer gears 602 respectively drive a small gear 603 to accelerate the rotation, the small gear 603 drives the connecting rod 605 to drive the water pump 604 to work, wherein one water pump 604 draws heat exchange liquid into the water inlet and accelerates the heat exchange liquid to be ejected from the water outlet, and the other water pump 604 also draws heat exchange liquid into the water inlet and accelerates the heat exchange liquid to be ejected from the water outlet, as shown in the attached figure. Figure 6As shown, the heat exchange liquid sprayed from the two water pumps 604 flows counterclockwise, and the heat exchange liquid circulates counterclockwise in two semicircular grooves 301 and two grooves 2002. During the process, the heat exchange liquid exchanges heat with the digestion box 2001, the heat exchange fins 2005 and the heat exchange cylinder 2004. During the one-way circulation of the heat exchange liquid, the heat exchange fins 2005 are pushed to rotate the heat exchange cylinder 2004, thereby accelerating the digestion process.

[0074] S4, flue gas treatment: the flue gas containing calcium hydroxide and water vapor generated in the digestion box 2001 enters the small chamber 20013 through the material box 2003, and then enters the treatment box 7001 through the flue gas reflux pipe 7002. After the calcium hydroxide in the flue gas is filtered out by the filter 7003, the water vapor in the flue gas is absorbed by the sponge board 7008 and discharged through the exhaust pipe 7009;

[0075] During the rotation of the transfer gear 602 in S3, the transfer gear 602 drives the second rotating shaft 7010 to rotate the second rotating disk 7011, the second rotating disk 7011 drives the second eccentric shaft 7012 to rotate, and the second eccentric shaft 7012 drives the cleaning frame 7013 to reciprocately clean the filter screen 7003, and sweep away the calcium hydroxide filtered from the flue gas on the filter screen 7003;

[0076] During the rotation of the driving gear 601 in S3, the driving gear 601 rotates the first turntable 7005 through the first rotating shaft 7004, the first turntable 7005 drives the first eccentric shaft 7006 to rotate, and the first eccentric shaft 7006 drives the frame 7007 to move back and forth left and right. During the process, the sponge plate 7008 is squeezed, and the squeezed water passes through the filter screen 7003 and flows back to the digestion box 2001 from the flue gas reflux pipe 7002. During the process, the calcium hydroxide filtered out from the filter screen 7003 is carried.

[0077] After the digestion treatment is completed, the lime milk can be discharged by opening the valved discharge pipe 2016, and after the heat exchange liquid reaches the preset target temperature, the valved water outlet pipe 303 can be opened to discharge the heat exchange liquid, and new heat exchange liquid can be added again through the valved water adding pipe 302.

Claims

1. A digestion process for calcium carbonate, characterized in that: The specific steps include: S1, material preparation: placing the qualified lime in the hopper (1), injecting water into the digestion component (2), and injecting heat exchange liquid into the heat exchange flow channel (3); S2, intermittent digestion treatment: starting the driving component (4), the driving component (4) drives the water in the digestion component (2) to circulate, during which the driving component (4) transports the lime in the hopper (1) to the digestion component (2) through the intermittent feeding component (5), so that the water and lime are digested in the digestion component (2); S3, heat exchange accelerated digestion treatment: after the driving component (4) is started in S2, the driving component (4) also drives the heat exchange liquid to unidirectionally circulate between the heat exchange channel (3) and the two digestion components (2) through the acceleration component (6), and the circulating heat exchange liquid drives the moving end of the driving component (4) to rotate, thereby accelerating the digestion speed of water and lime; S4, flue gas treatment: the flue gas generated in the digestion component (2) flows to the flue gas treatment component (7) and is discharged after being filtered; The digestion components (2) are provided in two groups, and the two groups of digestion components (2) both include a digestion box (2001), the top of the digestion box (2001) is provided with a groove (2002), a material box (2003) is fixedly installed on one side of the inner cavity of the groove (2002), a heat exchange cylinder (2004) is rotatably installed between the material box (2003) and the other side of the inner cavity of the groove (2002), a plurality of heat exchange fins (2005) are fixedly installed at even intervals on the outer periphery of the heat exchange cylinder (2004), a plurality of spiral sheets (2006) are also fixedly installed at even intervals inside the heat exchange cylinder (2004), the inner cavity of the digestion box (2001) includes a large chamber (20011), a flat chamber (20012) and a small chamber (20013) which are connected in sequence, and the material box (2003) and the small chamber (20013) are connected via an opening; A perforated mesh plate (2007) is fixedly installed inside the large chamber (20011) and below the heat exchange cylinder (2004); a piston plate (2008) is arranged at the bottom of the perforated mesh plate (2007); and a plurality of ejector pins (2009) adapted to the perforated mesh plate (2007) are fixedly installed on the top of the piston plate (2008); Positioning plates (2010) are fixedly installed on both sides of the inner cavity of the large chamber (20011), and the positioning plate (2010) is arranged below the notched piston plate (2008). A plurality of sliding rods (2011) are penetrated and slidably installed on the top of the positioning plate (2010), and an L-shaped plate (2012) is fixedly installed on the top of the plurality of sliding rods (2011) on the same positioning plate (2010). A spring (2013) is also sleeved on the outer periphery of the sliding rod (2011), and the two ends of the spring (2013) are respectively in contact with the top of the inner cavity of the L-shaped plate (2012) and the top of the positioning plate (2010); One side of the L-shaped plate (2012) is in sliding contact with one side of the inner cavity of the large chamber (20011), and flow ports (2014) are provided on both sides of the piston plate (2008) and directly above the L-shaped plate (2012); One side of the digestion box (2001) is connected with a feeding pipe (2015) with a valve and a discharging pipe (2016) with a valve in sequence from top to bottom; The driving assembly (4) comprises a driving motor (401), the output end of the driving motor (401) being fixedly mounted with a reciprocating screw (402) via a coupling, and the outer circumference of the reciprocating screw (402) being provided with a lifting frame (403) for use with the reciprocating screw; At least two insertion rods (404) are fixedly installed on both sides of the bottom of the lifting frame (403), and the bottom ends of the two insertion rods (404) penetrate the digestion box (2001) and the perforated mesh plate (2007), and are fixedly connected to the top of the piston plate (2008); A support base (8) is fixedly mounted on the bottoms of the two digestion boxes (2001); the drive motor (401) is arranged between the two digestion boxes (2001) and is fixedly mounted on the top middle portion of the support base (8); The heat exchange flow channel (3) comprises two semicircular groove pieces (301), the two ends of one semicircular groove piece (301) are respectively connected to the rear ends of the two grooves (2002), the two ends of the other semicircular groove piece (301) are respectively connected to the front ends of the two grooves (2002), and the bottoms of the two semicircular groove pieces (301) are fixedly connected to the top of the support base (8) via an expansion plate; The acceleration assembly (6) comprises a driving gear (601), two transfer gears (602) and two pinion gears (603); the driving gear (601) is meshed with the two transfer gears (602) respectively; the transfer gear (602) is meshed with the pinion gear (603); the diameters of the driving gear (601), the transfer gear (602) and the pinion gear (603) are successively reduced; a water pump (604) is installed at the bottom of the inner cavity of the semicircular groove member (301); the bottom of the pinion gear (603) is fixedly connected to the rotating shaft of the water pump (604) via a connecting rod (605); a vertical rod (606) is rotatably installed at the bottom of the transfer gear (602) via a bearing; the bottom end of the vertical rod (606) is fixedly connected to the top of the support base (8); and the driving gear (601) is fixedly installed at the top of the reciprocating screw (402); The hopper (1) and the intermittent feeding assembly (5) are both provided with two, and the two hoppers (1) are respectively fixedly mounted on the top of the two digestion boxes (2001); The intermittent feeding assembly (5) comprises a push plate (501), a rotating block on one side of the push plate (501) is rotatably mounted with a linkage plate (502), one side of the linkage plate (502) is rotatably connected to one side of the lifting frame (403) via the rotating block, two material plates (503) are fixedly mounted on one side of the push plate (501), one side of the hopper (1) is provided with a slot (504) adapted to the material plates (503), the bottom of the inner cavity of the hopper (1) is also provided with two drop openings (505) connected to the slots (504), the top of the material plate (503) is provided with a transfer opening (506) adapted to the drop opening (505), the bottom of the hopper (1) is also provided with a drop opening (507) adapted to the transfer opening (506), and the bottom of the hopper (1) is connected to the interior of the material box (2003) via a feeding pipe (508).

2. A digestion process for calcium carbonate according to claim 1, characterized in that: The flue gas treatment assembly (7) comprises a treatment box (7001), two sides of the treatment box (7001) are connected to two flue gas return pipes (7002), two filter screens (7003) are fixedly installed inside the treatment box (7001), the two flue gas return pipes (7002) are respectively arranged on opposite sides of the two filter screens (7003), a first rotating shaft (7004) is fixedly installed on the top of the driving gear (601), and the top end of the first rotating shaft (7004) passes through the treatment box (7001). 01), and a first rotating disk (7005) is fixedly installed thereon, a first eccentric shaft (7006) is fixedly installed on the top of the first rotating disk (7005), a square frame (7007) is sleeved on the outer periphery of the first eccentric shaft (7006), the front and rear sides of the square frame (7007) are in sliding contact with the opposite sides of the two filter screens (7003) respectively, and sponge plates (7008) are fixedly installed on both sides of the square frame (7007), and a smoke exhaust pipe (7009) is also connected to the middle of the top of the processing box (7001).

3. A digestion process for calcium carbonate according to claim 2, characterized in that: A second rotating shaft (7010) is fixedly installed on the top of the transfer gear (602), the top of the second rotating shaft (7010) passes through the processing box (7001) and is fixedly installed with a second turntable (7011), and a second eccentric shaft (7012) is fixedly installed on the top of the second turntable (7011), and a cleaning frame (7013) is provided on the outer periphery of the first eccentric shaft (7006), and the front and rear sides of the cleaning frame (7013) are respectively in sliding contact with the filter screen (7003) and one side of the inner cavity of the processing box (7001).

4. A digestion process for calcium carbonate according to claim 3, characterized in that: One end of the two flue gas return pipes (7002) are connected and fixed to the top of the digestion box (2001), and L-shaped brackets (7014) are fixedly installed on the front and rear sides of the top of the digestion box (2001), and one side of the L-shaped bracket (7014) is fixedly connected to one side of the treatment box (7001).

5. A digestion process for calcium carbonate according to claim 4, characterized in that: The outer arc surface of one of the semicircular groove members (301) is connected in sequence from top to bottom to a water supply pipe (302) with a valve and a water outlet pipe (303) with a valve.

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