Continuous production equipment and process for preparing superfine calcium carbonate from fly ash washing liquid

Abstract

The invention discloses continuous production equipment and process for preparing superfine calcium carbonate from fly ash water washing liquid, relates to the technical field of superfine calcium carbonate preparation, and aims to solve the technical problem that existing equipment for preparing superfine calcium carbonate from fly ash water washing liquid is insufficient in functionality. A secondary liquid phase pumping assembly is arranged on the preparation frame; a reaction assembly is further arranged on the preparation frame; the reaction assembly comprises a plurality of reaction tank bodies; a stirring assembly is arranged in the reaction tank body in a penetrating manner; a planetary mechanism is arranged at the top of the reaction tank body; the output end of the secondary liquid-phase pumping assembly is provided with a fly ash washing liquid shunting assembly; and the output end of the fly ash washing liquid shunting assembly is respectively provided with a collecting pipe assembly and a sodium carbonate shunting pipe assembly through a plurality of three-way valves. Diversification of functions is achieved through two different operation modes, and production operation of calcium carbonate of different specifications is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ultrafine calcium carbonate preparation, and more specifically to continuous production equipment and process for preparing ultrafine calcium carbonate from fly ash water washing liquid. Background Art

[0002] Fly ash washing liquid is produced in the process of washing fly ash from the incineration of domestic waste. The calcium resources in it can be recovered through the process and used to prepare ultrafine calcium carbonate. This not only reduces the environmental pollution caused by the direct discharge of fly ash washing liquid, but also converts waste into valuable products. For example, in the building materials, plastics, rubber and other industries, calcium carbonate is an important filler. This process allows the calcium resources that were originally discarded to regain economic value. Improve resource utilization: The calcium component in the fly ash washing liquid is effectively utilized, which reduces the dependence on natural limestone and other resources compared to traditional calcium source mining and processing methods. To a certain extent, it alleviates the damage to the ecological environment caused by mining, such as vegetation destruction and soil erosion caused by mining. Production equipment for preparing ultrafine calcium carbonate from fly ash washing liquid: Sedimentation tank: used to receive the fly ash water wash liquid and allow the large particles of impurities in it to be initially settled. The first plate-frame separator: installed on the pipeline between the sedimentation tank and the reaction tank, it can further filter the fly ash water wash liquid after the initial sedimentation and intercept the larger particles of suspended matter and other impurities. Ceramic membrane: located on the pipeline between the first plate-frame separator and the reaction tank, it can finely filter the fly ash water wash liquid to ensure that the suspended matter content in the water wash liquid entering the reaction tank is extremely low. Reaction tank: connected to the sedimentation tank through a pipeline, and including three groups of reaction tanks arranged in parallel, the number of operating reaction tanks can be adjusted according to the processing volume of the fly ash water wash liquid. A circulating pump is set at the bottom of the reaction tank, and an agitator is set inside to facilitate the full mixing and reaction of the materials. Sodium carbonate tank: used to store sodium carbonate solution, and sodium carbonate can be added to the reaction tank to provide carbonate ions for the reaction, which react with calcium ions in the fly ash water wash liquid to generate calcium carbonate. The second plate-frame separator: used to separate the solid-liquid materials discharged from the reaction tank, and separate the solid phase substances and liquids such as calcium carbonate generated by the reaction. Washing tank: The separated solid phase is broken up and enters the washing tank, where it is washed by adding washing water to remove impurities such as chloride ions. Centrifuge: Centrifuge the washed material to further improve the purity and solid content of the solid phase. Dryer: The solid phase obtained after centrifugal separation is dried by airflow drying, and then the ultrafine calcium carbonate product is obtained after grinding and crushing.

[0003] Production process: Pretreatment of fly ash washing liquid: The fly ash washing liquid produced in the fly ash washing and dechlorination process first enters the sedimentation tank for pre-sedimentation to remove larger particles of impurities. Then it is filtered through the first plate and frame separator, and then filtered through the ceramic membrane to control the suspended solids in the produced water below 30 mg / l, and ensure that the pH is not lower than 10.5. Reaction operation: The fly ash washing liquid enters the reaction tank, samples and detects the calcium ion concentration of the fly ash washing liquid and the sodium carbonate solution, calculates the dosage of the sodium carbonate solution, and mixes the reaction; Plate and frame separation: After the material is discharged from the reaction tank, it enters the second plate and frame separator for separation to obtain a solid phase and a liquid phase. Washing: The separated solid phase is broken up and then enters the washing tank, and the ratio of washing water to solid phase is controlled to be 1:1.2-3, and it is fully washed to remove the chloride ions in the ultrafine calcium carbonate product. Centrifugal separation: After washing, it enters the centrifuge for separation to further improve the purity and solid content of the solid phase.

[0004] During the reaction process, multiple reaction tanks are connected in parallel through pipelines. This setting enables flexible production scale adaptability to meet different production requirements: In the actual production process, the supply of fly ash water washing liquid may change due to various factors. For example, the processing volume of the upstream fly ash water washing process fluctuates, and the production plan is adjusted in different time periods. The three groups of parallel reaction tanks can flexibly adjust the number of operating reaction tanks according to the processing volume of the fly ash water washing liquid. If the amount of fly ash water washing liquid is small, only one group of reaction tanks can be opened to ensure that the reaction is carried out at a suitable residence time and reactant concentration, avoiding the problem of incomplete reaction or low efficiency due to insufficient raw materials; when the processing volume is large, multiple groups of reaction tanks can be opened at the same time to meet the needs of large-scale production and improve production efficiency. Adapt to market changes: From the perspective of product market demand, the market demand for calcium carbonate products will also fluctuate. When the market demand for ultrafine calcium carbonate is strong, enterprises can open all reaction tanks and increase production efforts; when the market demand is low, the number of operating reaction tanks can be reduced to reduce production costs, so that the production process can be more flexible to adapt to market changes.

[0005] The parallel connection of multiple reaction tank pipelines can improve the reliability and fault tolerance of the system, and can provide emergency protection for equipment failure. In the continuous production process, if any reaction tank fails (such as agitator failure, circulation pump damage, tank leakage, etc.), other normal reaction tanks can continue to work. This is like having multiple parallel roads in a traffic network. When a road (a reaction tank) has a problem (such as maintenance, accident), the material can still pass (react) normally through other roads (other reaction tanks), so as not to interrupt the entire production process. This design can provide enough time for the repair and maintenance of equipment and reduce production losses caused by sudden equipment failures. Ensure stable product quality: Even if the reaction conditions in a certain reaction tank are abnormal (such as temperature control failure, abnormal reactant concentration, etc.), since there are multiple reaction tanks working at the same time, the normal reaction in other reaction tanks can buffer the impact of this abnormal situation on the quality of the final product to a certain extent. For example, if the reaction temperature in one reaction tank is too high, the particle size of calcium carbonate crystals will be too large, but the qualified products generated by reactions in other reaction tanks at normal temperatures can be mixed with them. Through subsequent processing steps (such as grinding, grading, etc.), it is still possible to obtain ultrafine calcium carbonate products that meet the quality requirements.

[0006] When the reaction tanks are set up in series, there is a step-by-step reaction advantage, and the fly ash water wash and reactants (such as sodium carbonate) can undergo a step-by-step reaction process in different reaction tanks. Each reaction tank can be designed to have specific reaction conditions and functions. For example, in the first reaction tank, the temperature can be controlled in a relatively low range to allow calcium ions and carbonate ions to undergo a preliminary reaction to generate smaller calcium carbonate nuclei; in subsequent reaction tanks, the nuclei can be slowly grown by gradually increasing the temperature or adjusting the stirring speed, so that the crystallization process of calcium carbonate can be more accurately controlled, which is conducive to the generation of ultrafine calcium carbonate with more uniform particle size and better crystallinity; and the particle size growth can be accurately controlled by connecting the reaction tanks in series, and the generated calcium carbonate particles can more efficiently separate impurities and solids when they are centrifuged in a centrifuge. Smaller and more uniform particles can be better stratified under the action of centrifugal force, making it easier to remove impurities, thereby improving the purity of the product. During the drying and grinding process, this high-purity and uniform particle size calcium carbonate product is also more conducive to obtaining high-quality ultrafine calcium carbonate. For example, during the airflow drying process, uniform particles are dried more evenly, avoiding local overheating, etc. During grinding, the degree of particle refinement can be better controlled to reduce over-grinding or uneven grinding.

[0007] Improve the utilization of reactants: Ensure sufficient reaction: The series-connected reaction tanks can provide a longer reaction path and residence time, so that the calcium in the fly ash water wash and the added carbonate ions have more time to react. The reactants that have not reacted completely in the first reaction tank can continue to react in the subsequent reaction tanks. For example, since the calcium in the fly ash water wash may exist in different chemical forms and its reaction activity is also different, some less active calcium components may not have time to react in the first reaction tank. In the subsequent reaction tanks, as the reaction conditions are optimized (such as increasing the concentration of reactants, extending the reaction time, etc.), these calcium components can participate in the reaction more fully, thereby improving the overall utilization of reactants and reducing production costs.

[0008] As shown in the invention application disclosure (announcement) number: CN118718945A: The present invention discloses an equipment and process method for preparing ultrafine calcium carbonate from fly ash water washing liquid, comprising: a sedimentation tank, which can receive fly ash water washing liquid; a reaction tank, which is connected to the sedimentation tank through a pipeline, and the fly ash water washing liquid in the sedimentation tank can enter the reaction tank; a first plate and frame separator, and the first plate and frame separator is arranged on the pipeline between the sedimentation tank and the reaction tank; a sodium carbonate tank, which can add sodium carbonate into the reaction tank; the material in the reaction tank passes through the second plate and frame separator, the washing tank, the centrifuge and the dryer in sequence through the pipeline, so as to extract ultrafine calcium carbonate from the fly ash, realize the high-value utilization of the fly ash, and reduce the fly ash disposal cost.

[0009] Although the existing invention applications have many beneficial effects, they still have the following shortcomings: The existing equipment and process for preparing ultrafine calcium carbonate from fly ash water wash liquid achieve flexible production scale adaptability through parallel connection during the reaction process, cope with different production requirements, and improve the reliability and fault tolerance of the system. However, its function is single, and it is difficult to maintain the refined control of the reaction operation, sufficient reaction guarantee and preparation quality in the preparation process. Therefore, it is particularly important to propose a continuous production equipment and process for preparing ultrafine calcium carbonate from fly ash water wash liquid that is easy to carry out batch single production with relatively low preparation quality accuracy and specifications, as well as sufficient reaction and high preparation quality. In view of this, we propose a continuous production equipment and process for preparing ultrafine calcium carbonate from fly ash water wash liquid. Summary of the invention

[0010] The object of the present invention is to provide a continuous production device and process for preparing ultrafine calcium carbonate from fly ash water washing liquid, so as to solve the technical problem that the existing equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid is insufficient in functionality.

[0011] In order to solve the above technical problems, the present invention provides the following technical solutions: a continuous production equipment and process for preparing ultrafine calcium carbonate from fly ash water washing liquid, comprising a preparation rack; a secondary liquid phase pump supply assembly is arranged on the preparation rack; a reaction assembly is also arranged on the preparation rack; the reaction assembly comprises a plurality of reaction tank bodies; a stirring assembly is arranged inside the reaction tank body; a planetary mechanism is arranged on the top of the reaction tank body; a fly ash water washing liquid diversion assembly is arranged at the output end of the secondary liquid phase pump supply assembly; a manifold assembly and a sodium carbonate diversion pipe assembly are respectively arranged at the output end of the fly ash water washing liquid diversion assembly through a plurality of three-way valves; and flow control devices are arranged on the diversion outputs of the fly ash water washing liquid diversion assembly and the sodium carbonate diversion pipe assembly. Control valve; a mixed liquid manifold assembly is arranged at the bottom of the reaction tank body; wherein two adjacent reaction tank bodies are connected by an inclined series pipe; and, a sequential confluence pipe is arranged on the surface of one of the reaction tank bodies relatively far away from the secondary liquid phase pump supply assembly; and the input end of the sequential confluence pipe is arranged at the same height as the input end of the series pipe; wherein a number of the reaction tank bodies constitute a reaction tank group; a carrying frame is fixedly arranged on the reaction tank group; a driving mechanism for driving the planetary mechanism is arranged on the carrying frame; an adjusting mechanism for adjusting the power output of the planetary mechanism is arranged on the carrying frame; an auxiliary mechanism for driving the lifting and lowering adjustment of the stirring assembly is also arranged on the side of the carrying frame.

[0012] The present invention causes the stirring assembly to be lifted by the stroke operation of the auxiliary mechanism; then, a plurality of fly ash water washing liquid diversion assemblies are connected to the manifold assembly by adjusting the three-way valve, and the fly ash water washing liquid is transported to a plurality of reaction tank bodies in cooperation with the secondary liquid phase pump supply assembly; the sodium carbonate diversion pipe assembly is connected to the manifold assembly by adjusting the three-way valve to transport the required equivalent sodium carbonate solution to the plurality of reaction tank bodies, and the stirring assembly is driven to rotate and stir by the locking of the adjusting mechanism and the planetary mechanism driven by the driving mechanism; then, the reaction tank body cavity and the mixed liquid manifold assembly are refluxed and transported for the next step of processing by the return operation of the auxiliary mechanism, thereby realizing parallel reaction processing operation; and the stirring assembly is lifted by the stroke operation of the auxiliary mechanism; then, one of the three-way valves relatively close to the position of the secondary liquid phase pump supply assembly is adjusted to connect the reaction tank body with the fly ash water washing liquid diversion assembly and the manifold assembly. , and then the fly ash water washing liquid is transported to the reaction tank body through the secondary liquid phase pump component, and then the flow control valve at the position of the reaction tank body is opened, and the other reaction tank bodies can be opened appropriately according to the situation of the fly ash water washing liquid to add sodium carbonate; then the driving of the regulating mechanism and the driving mechanism drive the planetary mechanism to drive the stirring component to rotate and stir to form a sequential deceleration rotation drive. After the stirring is completed, the auxiliary mechanism stroke work causes the stirring component to lift the high end position of the series pipe, and the mixed liquid after the primary reaction is transported to the next reaction tank body to form a continuous series reaction state, and then it is reset and lowered so that the connecting component of the stirring component receives the contact pressure of the mixed liquid and opens, causing the mixed liquid to overflow to the top of the stirring component. By repeating the above operations, a sequential progressive full reaction effect is formed, and the above two different operation modes are used to achieve functional diversification, and the preparation operation of calcium carbonate with different production specifications and conditions is also realized.

[0013] Preferably, the secondary liquid phase pumping component includes a fly ash water washing liquid storage tank arranged on the preparation rack; a pump is arranged at the bottom of the fly ash water washing liquid storage tank through a pipeline; a lifting pipeline is arranged at the output end of the pump; the fly ash water washing liquid diversion component includes a fly ash water diversion primary pipe arranged in an inclined shape at the output end of the lifting pipeline; a plurality of fly ash water diversion secondary pipes are arranged on the fly ash water diversion primary pipe; the manifold assembly includes an adapter connecting pipe arranged at one end of the three-way valve; the output end of the adapter connecting pipe is provided with a movable connecting pipeline part which is interlaced and connected with the stirring assembly.

[0014] Preferably, the sodium carbonate diverter pipe assembly includes a sodium carbonate diverter secondary pipe arranged at the other end of the three-way valve; the input ends of several of the sodium carbonate diverter secondary pipes are connected through a sodium carbonate diverter primary pipe; and the input end of the sodium carbonate diverter primary pipe is connected to a sodium carbonate tank; the mixed liquor confluence pipe assembly includes a mixed liquor confluence secondary pipe arranged at the bottom of the reaction tank body; the output ends of several of the mixed liquor confluence secondary pipes are connected through a mixed liquor confluence primary pipe, and a control valve for controlling the flow on and off of several of the mixed liquor confluence secondary pipes is provided on the mixed liquor confluence primary pipe; the output end of the sequential confluence pipeline is connected to the output end of the mixed liquor confluence primary pipe.

[0015] Preferably, the stirring assembly includes a hollow key shaft that is movably inserted into the planetary mechanism; and, a plurality of channels for liquid circulation are opened on the surface of the hollow key shaft; a rotating floating plate is fixed at the bottom of the hollow key shaft; a stirring blade is fixed on the top of the rotating floating plate; an overflow one-way ring is rotatably arranged on the outer side of the rotating floating plate; and, the rotating floating plate is tightly fitted with the reaction tank body; a plurality of connecting grooves are arranged inside the overflow one-way ring; an adjusting shaft is movably arranged inside the connecting groove; and a limit block is arranged at the middle end of the adjusting shaft for limiting the axial movement of the adjusting shaft.

[0016] Preferably, the planetary mechanism includes a bearing seat arranged on the top of the reaction tank body by bolts; a center output gear shaft is rotatably arranged inside the bearing seat; and a key shaft cylinder is fixedly arranged at the bottom of the center output gear shaft by bolts; the key shaft cylinder is key-connected with the hollow key shaft; a planetary wheel carrier is provided on the movable sleeve on the side of the input end of the center output gear shaft; a planetary gear meshingly connected to the center output gear shaft is hingedly arranged on the planetary wheel carrier; a sun gear shaft sleeve is provided on the outer movable sleeve of the planetary wheel carrier; wherein, a vortex is provided on the outer surface of the sun gear shaft sleeve.

[0017] Preferably, the driving mechanism comprises a high-speed driving motor arranged on the mounting frame; a driving wheel is provided at the output end of the high-speed driving motor; wherein a plurality of the planetary wheel carriers are connected to the driving wheel via a transmission belt.

[0018] Preferably, the adjustment mechanism includes a multi-stage worm arranged on the mounting frame through a plurality of bearing shafts; and a worm portion is provided on the surface of the multi-stage worm relative to the vortex; wherein the axial diameters of the plurality of worm portions decrease successively; and the number of spiral turns within the same axial distance of the plurality of worm portions decreases successively; and a servo drive motor is provided at one end of the multi-stage worm.

[0019] Preferably, the auxiliary mechanism comprises a cylinder arranged on the mounting frame; a synchronous seat is installed on the pushing end of the cylinder; and the synchronous seat is rotatably connected to the hollow key shaft through a bearing.

[0020] A continuous production method for preparing ultrafine calcium carbonate from fly ash water washing liquid comprises the following steps: S100, primary pretreatment: determine the specifications and quality required for preparing ultrafine calcium carbonate; S200, secondary pretreatment: The fly ash washing liquid produced in the fly ash washing and dechlorination process is filtered through pre-sedimentation, plate and frame filtration, and ceramic membrane filtration to intercept the suspended matter in the fly ash washing liquid, and then filled and transported to the fly ash washing liquid storage tank; S300, tertiary pretreatment: preparing sodium carbonate solution and filling it into a sodium carbonate tank; S400, reaction adjustment processing: S401, if batch preparation reaction adjustment treatment is performed: the synchronous seat and the stirring assembly are driven to be lifted as a whole through the cylinder stroke operation, and the top of the adjustment shaft is kept in close sealing with the connecting groove; then the multiple fly ash water washing liquid diversion assemblies are connected with the manifold assembly through the three-way valve adjustment, and then the treated fly ash water washing liquid is transported from the lifting pipeline to the fly ash water diversion primary pipe and to several fly ash water diversion secondary pipes through the pump, and then transported to the adapter connecting pipe and the movable connecting pipe part through the three-way valve, and transported to multiple reaction tanks in combination with the hollow key shaft and the hole; then the sodium carbonate diversion pipe assembly is connected with the manifold assembly through the adjustment of the three-way valve, and the sodium carbonate solution is pumped to the sodium carbonate diversion primary pipe and the sodium carbonate diversion secondary pipe, and the pumping amount is controlled by the flow control valve, and then the adapter connecting pipe and the movable connecting pipe part are transported to multiple reaction tanks in combination with the hollow key shaft and the hole; S402, if high-quality preparation is carried out, the reaction adjustment treatment is carried out: the synchronous seat and the stirring assembly are driven to be lifted as a whole through the cylinder stroke operation, and the top of the adjustment shaft is kept in close contact with the connecting groove and sealed; then one of the three-way valves close to the fly ash water washing liquid storage tank is opened; then the treated fly ash water washing liquid is transported from the lifting pipeline to the fly ash water diversion primary pipe and to several fly ash water diversion secondary pipes through the pump, and then transported to the adapter connecting pipe and the movable connecting pipe part through the three-way valve, and transported to one of the reaction tank bodies in conjunction with the hollow key shaft and the hole; then the sodium carbonate diversion pipe assembly is connected with the manifold assembly through the adjustment of the three-way valve, and the sodium carbonate solution is pumped to the sodium carbonate diversion primary pipe and the sodium carbonate diversion secondary pipe, and the pumping amount is controlled by the flow control valve at the position of the reaction tank body, and then the adapter connecting pipe and the movable connecting pipe part are transported to the reaction tank body in conjunction with the hollow key shaft and the hole; S500, stirring treatment: S501, if a batch preparation stirring process is performed: the adjustment mechanism is locked, the high-speed drive motor is used to drive the drive wheel and the transmission belt to perform adaptive movement, the transmission belt is used to synchronously drive the planetary wheel frame to rotate, and the planetary gear is driven by the planetary wheel frame to cause the planetary gear to revolve and rotate, so that the central output gear shaft drives the key shaft cylinder, the hollow key shaft, and the rotating floating plate to perform stirring work; S502, if a high-quality mixing process is to be performed: a servo drive motor drives a multi-stage worm to drive the sun gear sleeve to rotate, and then a high-speed drive motor drives a drive wheel and a transmission belt to perform adaptive movement, and the transmission belt synchronously drives the planetary wheel carrier to rotate, and the planetary wheel carrier drives the planetary gear to revolve and rotate, so that multiple sets of central output gear shafts drive the key shaft cylinder, the hollow key shaft, and the rotating floating plate to perform mixing work with deceleration in sequence; S600, conveying work: S601, if the transportation work of batch preparation is carried out: the stirring assembly is lowered as a whole by the cylinder return drive, the adjustment shaft contacts the inner wall of the reaction tank, so that the adjustment shaft and the connecting groove are opened; all control valves are opened to transport to the processing container of the plate and frame separator; S602, if high-quality preparation and transportation work is to be carried out: the stirring assembly is driven by the cylinder stroke to rise as a whole, so that the reaction mixture flows from the high end of the series pipe to the bottom of the next reaction tank body, and then the stirring assembly is driven by the cylinder return stroke to drop as a whole, the adjustment shaft and the reaction mixture are lifted by the continuous descending adjustment shaft, and the reaction mixture is transported to the top of the rotating floating plate, and then S402, S502, S602, steps are repeated to work continuously until the reaction mixture is output from the sequential confluence pipe to the processing container of the plate and frame separator; S700, primary separation treatment: treating the reaction mixture through a plate and frame separator to obtain a solid phase and a liquid phase; S800, washing treatment: the separated solid phase is broken up and enters the washing tank for thorough washing to remove chloride ions in the ultrafine calcium carbonate product; S900, secondary separation treatment: after washing, it enters the centrifuge for separation to further improve the purity and solid content of the solid phase; S1000, crushing treatment: the solid phase obtained after separation enters the dryer, is airflow dried, and is ground and crushed to obtain ultrafine calcium carbonate.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention causes the stirring assembly to be lifted to through the stroke operation of the auxiliary mechanism; then, a plurality of fly ash water washing liquid diversion assemblies are connected to the manifold assembly through the three-way valve adjustment, and the fly ash water washing liquid is transported to a plurality of reaction tank bodies in cooperation with the secondary liquid phase pump supply assembly; the sodium carbonate diversion pipe assembly is connected to the manifold assembly through the three-way valve to transport the required equivalent sodium carbonate solution to a plurality of reaction tank bodies, and the stirring assembly is driven to rotate and stir by the locking of the adjustment mechanism and the planetary mechanism driven by the driving mechanism, and then the reaction tank body cavity and the mixed liquid manifold assembly are refluxed and transported for the next step of processing through the return operation of the auxiliary mechanism, thereby realizing the parallel reaction processing operation; and the stirring assembly is lifted through the stroke operation of the auxiliary mechanism; then, one of the three-way valves relatively close to the position of the secondary liquid phase pump supply assembly is adjusted, so that the reaction tank body and the fly ash water washing liquid diversion assembly and the manifold assembly are connected. The fly ash washing liquid is then connected through the secondary liquid phase pump to the component to transport the fly ash water washing liquid into the reaction tank body, and then the flow control valve at the position of the reaction tank body is opened, and the remaining reaction tank bodies can be opened appropriately to add sodium carbonate according to the situation of the fly ash water washing liquid; then the driving of the regulating mechanism and the driving mechanism drive the planetary mechanism to drive the stirring component to rotate and stir to form a sequentially decelerated rotation drive, and after the stirring is completed, the auxiliary mechanism stroke work causes the stirring component to lift the high end position of the series pipe, and the mixed liquid after the primary reaction is transported to the next reaction tank body to form a continuous series reaction state, and then it is reset and lowered so that the connecting component of the stirring component receives the contact pressure of the mixed liquid and opens, causing the mixed liquid to overflow to the top of the stirring component, and the above operations are repeated to form a sequential progressive full reaction effect, and the above two different operation modes are used to achieve functional diversification and realize the production operation of calcium carbonate of different specifications.

[0022] 2. The present invention uses the suspended height of the rotating floating plate close to the bottom to enable the adjusting shaft to block the connecting groove of the overflow one-way ring based on gravity; the rising distance of the adjusting shaft is effectively controlled by coordinating with the setting of the limit block, and at the same time, the gap in the limit block facilitates the flow of fly ash washing liquid.

[0023] 3. The present invention connects the key shaft tube with the hollow key shaft through a key, so that the hollow key shaft can be raised and lowered while maintaining the basic rotation action, thereby achieving the required lifting and lowering adjustment and rotation drive of the rotating floating plate.

[0024] 4. The present invention sets the axial diameter of the worm part to decrease successively and the number of spiral turns within the same axial distance to decrease successively, so that the multi-stage worm generates a speed difference in the sun gear sleeve transmission during the transmission work. The speed difference causes the stirring speeds of multiple stirring components to decrease successively under the continuous series reaction state of fly ash water washing liquid. In this way, sufficient energy is provided in the primary relative height stirring process to quickly and evenly disperse the reactants, thereby promoting the formation of a large number of calcium carbonate crystal nuclei. In this case, the number of crystal nuclei generated is large and the distribution is relatively uniform, laying the foundation for the subsequent small-particle calcium carbonate. As the stirring speed decreases, the crystal nuclei grow in a relatively mild environment. During the growth stage, a lower stirring speed can reduce the damage of the fluid shear force to the crystal nucleus, and prevent the newly generated crystal nucleus from being broken or colliding with each other due to excessive stirring. At the same time, a lower stirring speed also makes the concentration distribution of the reactants around the crystal nucleus more stable, which is conducive to the growth of the crystal nucleus at a relatively slow and uniform rate, thereby helping to control the particle size of calcium carbonate and make it grow into particles with smaller and uniform particle size; the utilization rate of the reactants is improved by series connection, resulting in continuous reaction between the fly ash water washing liquid and the reactants; and the adjustment mechanism is locked in the state by adapting the parallel reaction. Although the quality of the prepared ultrafine calcium carbonate is different, the processing efficiency is fast, simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention from another viewing angle; Figure 3 It is a schematic diagram of the three-dimensional structure of the fly ash water washing liquid diversion assembly, the sodium carbonate diversion pipe assembly, and the mixed liquid manifold assembly of the present invention; Figure 4 It is a schematic diagram of the internal cross-sectional structure of the reaction tank body of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the partially enlarged structure at center A; Figure 6 It is a schematic diagram of the cross-sectional structure of the planetary mechanism of the present invention.

[0026] Description of the numbers in the figure: 1. Preparation rack; 2. Secondary liquid phase pump assembly; 3. Reaction assembly; 4. Reaction tank; 5. Stirring assembly; 6. Planetary mechanism; 7. Fly ash washing liquid diversion assembly; 8. Three-way valve; 9. Manifold assembly; 10. Sodium carbonate diversion pipe assembly; 11. Mixed liquid manifold assembly; 12. Series pipe; 13. Sequential manifold; 14. Carrying rack; 15. Driving mechanism; 16. Adjusting mechanism; 17. Auxiliary mechanism; 201. Fly ash water washing liquid storage tank; 202. Pump; 203. Lifting pipeline; 501, hollow key shaft; 5011, channel; 502, rotating floating plate; 5021, stirring blade; 503, overflow one-way ring; 5031, connecting groove; 5032, adjusting shaft; 5033, limit block; 601, bearing seat; 602, central output gear shaft; 603, key shaft cylinder; 604, planetary wheel carrier; 605, planetary gear; 606, sun gear sleeve; 6061, volute; 701, fly ash water distribution primary pipe; 702, fly ash water distribution secondary pipe; 901, adapter connecting pipe; 9011, movable connecting pipe part; 1001, sodium carbonate shunt secondary tube; 1002, sodium carbonate shunt primary tube; 1101, a secondary pipe for mixed liquid confluence; 1102, a primary pipe for mixed liquid confluence; 1103, a control valve; 1501, high-speed driving motor; 1502, driving wheel; 1601, multi-stage worm; 1602, worm part; 1603, servo drive motor; 1701. Cylinder; 1702. Synchronous seat. DETAILED DESCRIPTION

[0027] Example 1: Figures 1 to 6 As shown, the present invention relates to a continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid, comprising a preparation frame 1; a secondary liquid phase pump supply assembly 2 is arranged on the preparation frame 1; a reaction assembly 3 is also arranged on the preparation frame 1; the reaction assembly 3 includes a plurality of reaction tank bodies 4; a stirring assembly 5 is penetrated inside the reaction tank body 4; a planetary mechanism 6 is arranged on the top of the reaction tank body 4; a fly ash water washing liquid diversion assembly 7 is arranged at the output end of the secondary liquid phase pump supply assembly 2; a plurality of three-way valves 8 are respectively arranged at the output end of the fly ash water washing liquid diversion assembly 7 with a manifold assembly 9 and a sodium carbonate diversion pipe assembly 10; and flow control valves are arranged on the diversion outputs of the fly ash water washing liquid diversion assembly 7 and the sodium carbonate diversion pipe assembly 10; the reaction tank body 4 A mixed liquid manifold assembly 11 is provided at the bottom; wherein two adjacent reaction tank bodies 4 are connected by an inclined series pipe 12; and, a sequential confluence pipe 13 is provided on the surface of one of the reaction tank bodies 4 which is relatively far away from the secondary liquid phase pump supply assembly 2; and, the input end of the sequential confluence pipe 13 is arranged at the same height as the input end of the series pipe 12; wherein, a number of reaction tank bodies 4 constitute a reaction tank group; a mounting frame 14 is fixedly provided on the reaction tank group; a driving mechanism 15 for driving the planetary mechanism 6 is provided on the mounting frame 14; an adjusting mechanism 16 for adjusting the power output of the planetary mechanism 6 is provided on the mounting frame 14; and an auxiliary mechanism 17 for driving the stirring assembly 5 to rise and fall is also provided on the side of the mounting frame 14. The present invention causes the stirring assembly 5 to be lifted to the position as shown in the figure through the stroke operation of the auxiliary mechanism 17. Figure 4The state shown; then the three-way valve 8 is used to adjust the multiple fly ash water washing liquid diversion components 7 and the manifold component 9 to be connected, and the secondary liquid phase pump component 2 is used to transport the fly ash water washing liquid to the multiple reaction tank bodies 4, and the sodium carbonate diversion pipe component 10 is adjusted to be connected with the manifold component 9 through the three-way valve 8, and the required equivalent sodium carbonate solution is transported to the multiple reaction tank bodies 4, and the adjustment mechanism 16 is locked and the planetary mechanism 6 is driven by the driving mechanism 15 to drive the stirring component 5 to rotate and stir, and then the auxiliary mechanism 17 is used to return the inner cavity of the reaction tank body 4 and the mixed liquid manifold component 11 to reflux and transport for the next step of processing, and the parallel reaction processing operation is realized in this way; and the auxiliary mechanism 17 is used to stroke the stirring component 5 to be lifted to the position as shown. Figure 4 The state shown; then adjust one of the three-way valves 8 relatively close to the position of the secondary liquid phase pump assembly 2, so that the reaction tank body 4 is connected with the fly ash water washing liquid diversion assembly 7 and the manifold assembly 9, and then the fly ash water washing liquid is transported to the reaction tank body 4 through the secondary liquid phase pump assembly 2, and then the flow control valve at the position of the reaction tank body 4 is opened, and the remaining reaction tank bodies 4 can be opened appropriately according to the situation of the fly ash water washing liquid to add sodium carbonate; then cooperate with the drive of the regulating mechanism 16 and the drive mechanism 15 to drive the planetary mechanism 6 to drive the stirring assembly 5 to rotate and stir The stirring is formed by sequentially decelerating rotation drive. After the stirring is completed, the auxiliary mechanism 17 strokes to cause the stirring component 5 to lift the high end position of the series pipe 12, and transport the mixed liquid after the primary reaction to the next reaction tank 4 to form a continuous series reaction state. Then, it is reset and descended so that the connecting part of the stirring component 5 receives the contact pressure of the mixed liquid and opens, causing the mixed liquid to overflow to the top of the stirring component 5. By repeating the above operation, a sequential progressive full reaction effect is formed. The above two different operation modes realize the diversification of functions, and the production operation of calcium carbonate of different specifications is realized.

[0028] In the embodiment of the present invention, the secondary liquid phase pumping assembly 2 includes a fly ash water washing liquid storage tank 201 arranged on the preparation rack 1; a pump 202 is arranged at the bottom of the fly ash water washing liquid storage tank 201 through a pipeline; a lifting pipeline 203 is arranged at the output end of the pump 202; the fly ash water washing liquid diversion assembly 7 includes a fly ash water diversion primary pipe 701 arranged at the output end of the lifting pipeline 203 in an inclined shape; a plurality of fly ash water diversion secondary pipes 702 are arranged on the fly ash water diversion primary pipe 701; the manifold assembly 9 includes an adapter connecting pipe 901 arranged at one end of the three-way valve 8; and a movable connecting pipe part 9011 is arranged at the output end of the adapter connecting pipe 901 to be interlaced and connected with the stirring assembly 5. The present invention can effectively gather the fly ash water washing liquid remaining in the pipeline at one end through the fly ash water diversion primary pipe 701 arranged in an inclined shape, so as to facilitate the opening of the valve at the end for collection.

[0029] In an embodiment of the present invention, the sodium carbonate diverter pipe assembly 10 includes a sodium carbonate diverter secondary pipe 1001 arranged at the other end of the three-way valve 8; the input ends of several sodium carbonate diverter secondary pipes 1001 are connected through a sodium carbonate diverter primary pipe 1002; and the input end of the sodium carbonate diverter primary pipe 1002 is connected to a sodium carbonate tank; the mixed liquor confluence pipe assembly 11 includes a mixed liquor confluence secondary pipe 1101 arranged at the bottom of the reaction tank body 4; the output ends of several mixed liquor confluence secondary pipes 1101 are all connected through the mixed liquor confluence primary pipe 1102, and the mixed liquor confluence primary pipe 1102 is provided with a control valve 1103 for controlling the flow on and off of several mixed liquor confluence secondary pipes 1101; the output end of the sequential confluence pipeline 13 is connected to the output end of the mixed liquor confluence primary pipe 1102.

[0030] In an embodiment of the present invention, the stirring assembly 5 includes a hollow key shaft 501 that is movably inserted into the planetary mechanism 6; and, a plurality of channels 5011 for liquid phase circulation are opened on the surface of the hollow key shaft 501; a rotating floating plate 502 is fixed at the bottom of the hollow key shaft 501; a stirring blade 5021 is fixedly arranged on the top of the rotating floating plate 502; an overflow one-way ring 503 is rotatably arranged on the outer side of the rotating floating plate 502; and, the rotating floating plate 502 is tightly fitted with the reaction tank body 4; a plurality of connecting grooves 5031 are arranged inside the overflow one-way ring 503; an adjusting shaft 5032 is movably arranged inside the connecting groove 5031; and a limit block 5033 for limiting the axial movement of the adjusting shaft 5032 is arranged at the middle end of the adjusting shaft 5032. The present invention is based on the suspended height of the rotating floating plate 502 close to the bottom, so that the adjusting shaft 5032 blocks the connecting groove 5031 of the overflow one-way ring 503 based on gravity; the rising distance of the adjusting shaft 5032 is effectively controlled by cooperating with the setting of the limit block 5033, and at the same time, the gap of the limit block 5033 facilitates the flow of fly ash water washing liquid.

[0031] In the embodiment of the present invention, the planetary mechanism 6 includes a bearing seat 601 arranged on the top of the reaction tank body 4 by bolts; a central output gear shaft 602 is rotatably arranged inside the bearing seat 601; and a key shaft cylinder 603 is fixedly arranged at the bottom of the central output gear shaft 602 by bolts; the key shaft cylinder 603 is key-connected with the hollow key shaft 501; a planetary gear carrier 604 is provided on the movable sleeve on the side of the input end of the central output gear shaft 602; a planetary gear 605 meshingly connected with the central output gear shaft 602 is hingedly arranged on the planetary gear carrier 604; a sun gear shaft sleeve 606 is provided on the outer surface of the sun gear shaft sleeve 606; wherein, a vortex 6061 is provided. The present invention is key-connected with the hollow key shaft 501 by the key shaft cylinder 603, so that the hollow key shaft 501 can be lifted and lowered while maintaining the basic rotation action, so as to realize the lifting and lowering adjustment and rotation drive of the rotating floating plate 502.

[0032] In the embodiment of the present invention, the driving mechanism 15 includes a high-speed driving motor 1501 arranged on the mounting frame 14; a driving wheel 1502 is provided at the output end of the high-speed driving motor 1501; wherein a plurality of planetary wheel carriers 604 are connected to the driving wheel 1502 through a transmission belt. The present invention drives the driving wheel 1502 and the transmission belt to perform adaptive motion through the high-speed driving motor 1501, and synchronously drives the planetary wheel carrier 604 to perform a rotational motion through the transmission belt, and forms a rotational power input to the stirring component 5 through the rotational motion.

[0033] In an embodiment of the present invention, the adjustment mechanism 16 includes a multi-stage worm 1601 arranged on the mounting frame 14 through a plurality of bearing shafts; and, a worm portion 1602 is provided on the surface of the multi-stage worm 1601 relative to the vortex 6061; wherein, the axial diameters of the plurality of worm portions 1602 decrease successively; and, the number of spiral turns within the same axial distance of the plurality of worm portions 1602 decreases successively; and a servo drive motor 1603 is provided at one end of the multi-stage worm 1601. The present invention reduces the axial diameter of the worm portion 1602 in sequence, and the number of spiral turns of the worm portions 1602 within the same axial distance is set in sequence, so that the multi-stage worm 1601 generates a speed difference in the transmission of the sun gear sleeve 606 during the transmission operation. Due to the speed difference, the stirring speeds of the multiple stirring components 5 are reduced in sequence under the continuous series fly ash water washing liquid reaction state. In this way, sufficient energy is provided in the primary relative height stirring process to quickly and evenly disperse the reactants, thereby promoting the formation of a large number of calcium carbonate crystal nuclei. In this case, the number of crystal nuclei generated is large and the distribution is relatively uniform, laying a foundation for the subsequent small-particle calcium carbonate. As the stirring speed decreases, the crystal nuclei are relatively mild. The lower stirring speed can reduce the damage of fluid shear force to the crystal nucleus during the crystal nucleus growth stage, and avoid the newly generated crystal nucleus from being broken or colliding with each other due to excessive stirring. At the same time, the lower stirring speed also makes the concentration distribution of reactants around the crystal nucleus more stable, which is conducive to the growth of the crystal nucleus at a relatively slow and uniform rate, thereby helping to control the particle size of calcium carbonate and make it grow into particles with smaller and uniform particle size; the utilization rate of reactants is improved by series connection, so that the fly ash water washing liquid and the reactants continue to react; and the adjustment mechanism 16 is locked in the state by adapting the parallel reaction, and the processing operation is realized. Although the quality of the prepared ultrafine calcium carbonate is different, the processing efficiency is fast, simple and efficient.

[0034] In the embodiment of the present invention, the auxiliary mechanism 17 includes a cylinder 1701 arranged on the mounting frame 14; a synchronous seat 1702 is installed on the pushing end of the cylinder 1701; and the synchronous seat 1702 is rotatably connected to the hollow key shaft 501 through a bearing.

[0035] Example 2: This example provides a continuous production process for preparing ultrafine calcium carbonate from fly ash water washing liquid, using the following steps: S100, primary pretreatment: determine the specifications and quality required for preparing ultrafine calcium carbonate; S200, secondary pretreatment: the fly ash washing liquid produced in the fly ash washing and dechlorination process is subjected to pre-sedimentation, plate and frame filtration, and ceramic membrane filtration to intercept suspended solids in the fly ash washing liquid, and then filled and transported to the fly ash washing liquid storage tank 201; S300, tertiary pretreatment: preparing sodium carbonate solution and filling it into a sodium carbonate tank; S400, reaction adjustment processing: S401, if batch preparation reaction adjustment treatment is performed: the cylinder 1701 is used to drive the synchronous seat 1702 and the stirring assembly 5 to be lifted as a whole, and the top of the adjustment shaft 5032 is kept in close contact with the connecting groove 5031; then the three-way valve 8 is used to adjust the connection between the multiple fly ash water washing liquid diversion assemblies 7 and the manifold assembly 9, and then the treated fly ash water washing liquid is transported to the fly ash water diversion primary pipe 701 and to several fly ash water diversion secondary pipes 702 through the pump 202, and then transported to the adapter through the three-way valve 8. The connecting pipe 901 and the movable connecting pipe part 9011 cooperate with the hollow key shaft 501 and the channel 5011 to be transported to multiple reaction tank bodies 4; then the sodium carbonate diversion pipe assembly 10 is connected with the manifold assembly 9 by adjusting the three-way valve 8, and the sodium carbonate solution is pumped to the sodium carbonate diversion primary pipe 1002 and the sodium carbonate diversion secondary pipe 1001, and the pumping amount is controlled by the flow control valve, and then the delivery adapter connecting pipe 901 and the movable connecting pipe part 9011 cooperate with the hollow key shaft 501 and the channel 5011 to be transported to multiple reaction tank bodies 4; S402, if high-quality preparation is carried out, the reaction adjustment treatment is carried out: the synchronous seat 1702 and the stirring assembly 5 are driven to be lifted as a whole through the stroke operation of the cylinder 1701, and the top of the adjustment shaft 5032 is kept in close contact and sealed with the connecting groove 5031; then one of the three-way valves 8 close to the fly ash water washing liquid storage tank 201 is opened; then the treated fly ash water washing liquid is transported to the fly ash water primary distribution pipe 701 and to several fly ash water secondary distribution pipes 702 through the pump 202, and then transported to the adapter connecting pipe 901 and The movable connecting pipe part 9011 cooperates with the hollow key shaft 501 and the channel 5011 to be transported to one of the reaction tank bodies 4; then the sodium carbonate diversion pipe assembly 10 is connected with the manifold assembly 9 by adjusting the three-way valve 8, and the sodium carbonate solution is pumped to the sodium carbonate diversion primary pipe 1002 and the sodium carbonate diversion secondary pipe 1001, and the pumping amount is controlled by the flow control valve at the position of the reaction tank body 4, and then the adapter connecting pipe 901 and the movable connecting pipe part 9011 are transported to the reaction tank body 4 by the hollow key shaft 501 and the channel 5011; S500, stirring treatment: S501, if batch preparation is to be stirred: the adjustment mechanism 16 is locked, the high-speed drive motor 1501 is used to drive the drive wheel 1502 and the transmission belt to perform adaptive movement, the transmission belt synchronously drives the planetary wheel carrier 604 to rotate, and the planetary wheel carrier 604 drives the planetary gear 605 to revolve and rotate, so that the central output gear shaft 602 drives the key shaft cylinder 603, the hollow key shaft 501, and the rotating floating plate 502 to perform stirring; S502, if high-quality preparation is to be stirred: the servo drive motor 1603 drives the multi-stage worm 1601 to drive the sun gear sleeve 606 to rotate, and then the high-speed drive motor 1501 drives the drive wheel 1502 and the transmission belt to perform adaptive movement, and the transmission belt synchronously drives the planetary wheel carrier 604 to rotate, and the planetary wheel carrier 604 drives the planetary gear 605 to revolve and rotate, so that the multiple sets of central output gear shafts 602 drive the key shaft cylinder 603, the hollow key shaft 501, and the rotating floating plate 502 to perform the stirring work of decelerating in sequence; S600, conveying work: S601, if the transportation work of batch preparation is carried out: the cylinder 1701 is driven back to cause the stirring assembly 5 to descend as a whole, and the adjustment shaft 5032 contacts the inner wall of the reaction tank body 4 so that the adjustment shaft 5032 and the connecting groove 5031 are opened; all control valves 1103 are opened to transport to the processing container of the plate and frame separator; S602, if high-quality preparation and transportation work is to be carried out: the cylinder 1701 is driven by the stroke to cause the stirring assembly 5 to rise as a whole, so that the reaction mixture flows from the high end of the series pipe 12 to the bottom of the next reaction tank body 4, and then the cylinder 1701 is driven by the return stroke to cause the stirring assembly 5 to fall as a whole, and the adjustment shaft 5032 and the reaction mixture are lifted by the continuous descending adjustment shaft 5032, and the reaction mixture is transported to the top of the rotating floating plate 502, and then S402, S502, S602, steps are repeated to work continuously until the reaction mixture is output from the sequential confluence pipe 13 to the processing container of the plate and frame separator; S700, primary separation treatment: treating the reaction mixture through a plate and frame separator to obtain a solid phase and a liquid phase; S800, washing treatment: the separated solid phase is broken up and enters the washing tank for thorough washing to remove chloride ions in the ultrafine calcium carbonate product; S900, secondary separation treatment: after washing, it enters the centrifuge for separation to further improve the purity and solid content of the solid phase; S1000, crushing treatment: the solid phase obtained after separation enters the dryer, is airflow dried, and is ground and crushed to obtain ultrafine calcium carbonate.

[0036] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid, characterized in that: It comprises a preparation rack (1); a secondary liquid phase pump assembly (2) is arranged on the preparation rack (1); and a reaction assembly (3) is also arranged on the preparation rack (1); The reaction assembly (3) comprises a plurality of reaction tank bodies (4); a stirring assembly (5) is provided inside the reaction tank body (4); a planetary mechanism (6) is provided on the top of the reaction tank body (4); a fly ash water washing liquid diversion assembly (7) is provided at the output end of the secondary liquid phase pump assembly (2); a manifold assembly (9) and a sodium carbonate diversion pipe assembly (10) are provided at the output end of the fly ash water washing liquid diversion assembly (7) through a plurality of three-way valves (8); and flow control valves are provided on the diversion outputs of the fly ash water washing liquid diversion assembly (7) and the sodium carbonate diversion pipe assembly (10); A mixed liquid manifold assembly (11) is provided at the bottom of the reaction tank body (4); Wherein, two adjacent reaction tanks (4) are connected via an inclined series pipe (12); Furthermore, a sequential confluence pipe (13) is provided on the surface of one of the reaction tank bodies (4) which is relatively far from the secondary liquid phase pump supply component (2); and the input end of the sequential confluence pipe (13) is arranged at the same height as the input end of the series pipe (12); A plurality of the reaction tank bodies (4) constitute a reaction tank group; a carrying frame (14) is fixedly arranged on the reaction tank group; a driving mechanism (15) for driving the planetary mechanism (6) is arranged on the carrying frame (14); an adjusting mechanism (16) for adjusting the power output of the planetary mechanism (6) is arranged on the carrying frame (14); and an auxiliary mechanism (17) for driving the stirring assembly (5) to rise and fall is also arranged on the side of the carrying frame (14).

2. The continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid according to claim 1 is characterized in that: The secondary liquid phase pumping assembly (2) comprises a fly ash water washing liquid storage tank (201) arranged on the preparation rack (1); a pump (202) is arranged at the bottom of the fly ash water washing liquid storage tank (201) via a pipeline; and a lifting pipeline (203) is arranged at the output end of the pump (202); The fly ash water washing liquid flow dividing assembly (7) comprises a fly ash water primary distribution pipe (701) arranged in an inclined manner at the output end of the lifting pipeline (203); a plurality of fly ash water secondary distribution pipes (702) are arranged on the fly ash water primary distribution pipe (701); The manifold assembly (9) comprises an adaptor connecting pipe (901) arranged at one end of the three-way valve (8); the output end of the adaptor connecting pipe (901) is provided with a movable connecting pipe portion (9011) which is interlaced and connected with the stirring assembly (5).

3. The continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid according to claim 2 is characterized in that: The sodium carbonate shunt pipe assembly (10) comprises a sodium carbonate shunt secondary pipe (1001) arranged at the other end of the three-way valve (8); the input ends of a plurality of the sodium carbonate shunt secondary pipes (1001) are connected via a sodium carbonate shunt primary pipe (1002); and the input end of the sodium carbonate shunt primary pipe (1002) is connected to a sodium carbonate tank; The mixed liquid confluence pipe assembly (11) comprises a mixed liquid confluence secondary pipe (1101) arranged at the bottom of the reaction tank body (4); the output ends of a plurality of the mixed liquid confluence secondary pipes (1101) are connected via a mixed liquid confluence primary pipe (1102), and a control valve (1103) for controlling the flow on and off of the plurality of the mixed liquid confluence secondary pipes (1101) is provided on the mixed liquid confluence primary pipe (1102); The output end of the sequential confluence pipeline (13) is connected to the output end of the mixed liquid confluence primary pipe (1102).

4. The continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid according to claim 3 is characterized in that: The stirring assembly (5) comprises a hollow key shaft (501) that movably penetrates into the planetary mechanism (6); Furthermore, a plurality of channels (5011) for liquid flow are provided on the surface of the hollow key shaft (501); A rotating floating plate (502) is fixed at the bottom of the hollow key shaft (501); a stirring blade (5021) is fixedly arranged at the top of the rotating floating plate (502); The rotating floating plate (502) is provided with an overflow one-way ring (503) for rotation on the outer side thereof; and the rotating floating plate (502) is tightly fitted to the reaction tank body (4); A plurality of connecting grooves (5031) are arranged inside the overflow one-way ring (503); an adjusting shaft (5032) is movably arranged inside the connecting groove (5031); and a limiting block (5033) for limiting the axial movement of the adjusting shaft (5032) is arranged at the middle end of the adjusting shaft (5032).

5. The continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid according to claim 4 is characterized in that: The planetary mechanism (6) comprises a bearing seat (601) arranged on the top of the reaction tank body (4) by bolts; a central output gear shaft (602) is rotatably arranged inside the bearing seat (601); and a key shaft cylinder (603) is fixedly arranged at the bottom of the central output gear shaft (602) by bolts; the key shaft cylinder (603) is key-connected to the hollow key shaft (501); A planetary gear carrier (604) is provided on the movable sleeve on the side of the input end of the central output gear shaft (602); a planetary gear (605) meshingly connected to the central output gear shaft (602) is hingedly provided on the planetary gear carrier (604); The outer movable sleeve of the planetary wheel carrier (604) is provided with a sun gear shaft sleeve (606); Wherein, a volute (6061) is provided on the outer surface of the sun gear sleeve (606).

6. The continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid according to claim 5, characterized in that: The driving mechanism (15) comprises a high-speed driving motor (1501) arranged on the mounting frame (14); a driving wheel (1502) is provided at the output end of the high-speed driving motor (1501); wherein a plurality of the planetary wheel carriers (604) are drivingly connected to the driving wheel (1502) via a transmission belt.

7. The continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid according to claim 6, characterized in that: The adjustment mechanism (16) comprises a multi-stage worm (1601) arranged on the mounting frame (14) via a plurality of bearing shafts; and a worm portion (1602) is provided on the surface of the multi-stage worm (1601) at a position opposite to the volute (6061); Wherein, the axial diameters of the plurality of worm parts (1602) decrease in sequence; Furthermore, the number of spiral turns of the worm parts (1602) decreases in sequence within the same axial distance; A servo drive motor (1603) is provided at one end of the multi-stage worm (1601).

8. The continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid according to claim 7, characterized in that: The auxiliary mechanism (17) comprises a cylinder (1701) arranged on the mounting frame (14); a synchronous seat (1702) is installed on the pushing end of the cylinder (1701); and the synchronous seat (1702) is rotatably connected to the hollow key shaft (501) via a bearing.

9. A continuous production process for preparing ultrafine calcium carbonate from fly ash water washing liquid, which is applicable to the continuous production equipment for preparing ultrafine calcium carbonate from fly ash water washing liquid as claimed in claim 8, characterized in that: The following steps are involved: S100, primary pretreatment: determine the specifications and quality required for preparing ultrafine calcium carbonate; S200, secondary pretreatment: the fly ash washing liquid generated in the fly ash washing and dechlorination process is subjected to pre-sedimentation, plate and frame filtration, and ceramic membrane filtration to intercept suspended solids in the fly ash washing liquid, and is then filled and transported to a fly ash washing liquid storage tank (201); S300, tertiary pretreatment: preparing sodium carbonate solution and filling it into a sodium carbonate tank; S400, reaction adjustment processing: S401, if batch preparation reaction adjustment treatment is performed: the cylinder (1701) is driven to stroke and drive the synchronous seat (1702) and the stirring assembly (5) to be lifted as a whole, and the top of the adjustment shaft (5032) is kept in close contact and sealed with the connecting groove (5031); then the three-way valve (8) is adjusted to connect the multiple fly ash water washing liquid diversion assemblies (7) with the manifold assembly (9); then the pump (202) is used to transport the treated fly ash water washing liquid through the lifting pipeline (203) to the fly ash water diversion primary pipe (701) and to the multiple fly ash water diversion secondary pipes (702), and then transport it to the adapter connection through the three-way valve (8). The sodium carbonate solution is pumped to the sodium carbonate primary shunt pipe (1002) and the sodium carbonate secondary shunt pipe (1001) by adjusting the three-way valve (8) and the movably connected pipe part (9011), and the hollow key shaft (501) and the hole (5011) to be transported to the multiple reaction tank bodies (4); the sodium carbonate solution is pumped to the sodium carbonate primary shunt pipe (1002) and the sodium carbonate secondary shunt pipe (1001), and the pumping amount is controlled by the flow control valve; and the sodium carbonate solution is then transported to the sodium carbonate primary shunt pipe (1002) and the sodium carbonate secondary shunt pipe (1001) by adjusting the three-way valve (8) and the movably connected pipe part (9011), and the hollow key shaft (501) and the hole (5011) to be transported to the multiple reaction tank bodies (4); S402, if high-quality preparation is to be carried out, the reaction adjustment treatment is carried out: the synchronous seat (1702) and the stirring assembly (5) are driven to be lifted as a whole through the stroke operation of the cylinder (1701), and the top of the adjustment shaft (5032) is kept in close contact and sealed with the connecting groove (5031); then one of the three-way valves (8) close to the fly ash water washing liquid storage tank (201) is opened; then the treated fly ash water washing liquid is transported to the fly ash water distribution primary pipe (701) and to several fly ash water distribution secondary pipes (702) through the pump (202), and then transported to the adapter connecting pipe (901) and the movable pipe (901) through the three-way valve (8). The connecting pipe part (9011) cooperates with the hollow key shaft (501) and the hole (5011) to be transported to one of the reaction tank bodies (4); then the sodium carbonate diversion pipe assembly (10) is connected to the manifold assembly (9) by adjusting the three-way valve (8), and the sodium carbonate solution is pumped to the sodium carbonate diversion primary pipe (1002) and the sodium carbonate diversion secondary pipe (1001), and the pumping amount is controlled by the flow control valve at the position of the reaction tank body (4), and then the adaptor connecting pipe (901) and the movable connecting pipe part (9011) cooperate with the hollow key shaft (501) and the hole (5011) to be transported to the reaction tank body (4); S500, stirring treatment: S501, if a mixing process is performed for batch preparation: the adjustment mechanism (16) is locked, and the high-speed drive motor (1501) is used to drive the drive wheel (1502) and the transmission belt to perform adaptive movement, and the transmission belt is used to synchronously drive the planetary wheel carrier (604) to rotate, and the planetary wheel carrier (604) is used to drive the planetary gear (605) to revolve and rotate, so that the central output gear shaft (602) drives the key shaft cylinder (603), the hollow key shaft (501), and the rotating floating plate (502) to perform mixing; S502, if a high-quality preparation stirring process is to be performed: the servo drive motor (1603) drives the multi-stage worm (1601) to drive the sun gear sleeve (606) to rotate, and then the high-speed drive motor (1501) drives the drive wheel (1502) and the transmission belt to perform adaptive movement, and the transmission belt synchronously drives the planetary wheel carrier (604) to rotate, and the planetary wheel carrier (604) drives the planetary gear (605) to revolve and rotate, so that the multiple sets of central output gear shafts (602) drive the key shaft cylinder (603), the hollow key shaft (501), and the rotating floating plate (502) to perform a stirring process of decelerating in sequence; S600, conveying work: S601, if the transportation work of batch preparation is carried out: the cylinder (1701) is driven back to cause the stirring assembly (5) to descend as a whole, the adjustment shaft (5032) contacts the inner wall of the reaction tank body (4) so ​​that the adjustment shaft (5032) and the connecting groove (5031) are opened; all control valves (1103) are opened to transport to the processing container of the plate and frame separator; S602, if high-quality preparation and transportation work is to be carried out: the cylinder (1701) is driven by the stroke to cause the stirring assembly (5) to rise as a whole, so that the reaction mixture flows from the high end of the series pipe (12) to the bottom of the next reaction tank (4), and then the cylinder (1701) is driven by the return stroke to cause the stirring assembly (5) to descend as a whole, and the adjustment shaft (5032) and the reaction mixture are lifted by the continuous descending adjustment shaft (5032), and the reaction mixture is transported to the top of the rotating floating plate (502), and then the steps S402, S502, S602 are repeated to work continuously until the reaction mixture is output from the sequential confluence pipe (13) to the processing container of the plate and frame separator; S700, primary separation treatment: treating the reaction mixture through a plate and frame separator to obtain a solid phase and a liquid phase; S800, washing treatment: the separated solid phase is broken up and enters the washing tank for thorough washing to remove chloride ions in the ultrafine calcium carbonate product; S900, secondary separation treatment: after washing, it enters the centrifuge for separation to further improve the purity and solid content of the solid phase; S1000, crushing treatment: the solid phase obtained after separation enters the dryer, is airflow dried, and is ground and crushed to obtain ultrafine calcium carbonate.

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