A limestone slurry preparation device for flue gas desulfurization in a thermal power plant

Abstract

The application discloses a limestone slurry preparation equipment for flue gas desulfurization of a thermal power plant and belongs to the field of limestone slurry preparation equipment. The limestone slurry preparation equipment comprises a crushing bin body, a slurry preparation bin is fixedly connected to the lower surface of the crushing bin body, a water inlet is communicated with the edge of the upper surface of the slurry preparation bin, a motor seat is fixedly connected to the outer surface of the crushing bin body close to the top, and a second driving motor is fixedly connected to the upper surface of the motor seat. The crushing assembly is arranged to crush limestone into small particles, the small particles fall between the grinding frame and the grinding block, and the rotating grinding block grinds the small particles into powder, so that the grinding block can impact and crush the limestone while grinding when rotating, grinding and crushing can be simultaneously performed, particles of different sizes can be ground into limestone powder with consistent size, and the situation that large particles are mixed in the powder does not occur, so that the quality during subsequent slurry preparation is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of limestone powder pulping, more particularly to a limestone slurry pulping equipment for flue gas desulfurization in a thermal power plant. BACKGROUND

[0002] Flue gas desulfurization refers to the removal of sulfur oxides (SO2 and SO3) from flue gas or other industrial waste gas. Flue gas desulfurization, abbreviated as FGD, in FGD technology, can be divided into the following five methods according to the type of desulfurizer: calcium method based on CaCO3 (limestone), magnesium method based on MgO, sodium method based on Na2SO3, ammonia method based on NH3, and organic alkali method based on organic alkali.

[0003] Limestone slurry is an indispensable raw material in the limestone slurry supply system. In order to improve the pulping efficiency during limestone powder pulping, the limestone is usually crushed, and then mixed through a mixing device. However, the mixing device in the existing limestone powder pulping equipment mostly uses stirring parts for repeated stirring, without circulating mixing effect. This operation mode takes a long time for pulping, the mixing is uneven, and the solubility of the prepared slurry is low, affecting the subsequent use effect.

[0004] To solve the above technical problems, the prior art also proposes some solutions, such as Chinese patent application No. 202110805738.5 discloses a limestone powder pulping equipment. The device sets spiral pushing leaves, which are pushed downward by the driving shaft to push the limestone powder mixed liquid inside the pulping cylinder downward. Under the extrusion force of pushing, the limestone powder mixed liquid is transported to the top of the pulping cylinder along the two pulping cylinders. The flow collector can collect the two transported limestone powder mixed liquids, and the transport impact force increases the mixing solubility of the limestone powder mixed liquid. However, the device produces particles of different sizes during crushing, and the particle size is not uniform, which causes the solubility of the particles to be different, thereby affecting the pulping effect during pulping, and causing poor effect of limestone slurry during desulfurization. SUMMARY

[0005] In view of the problems existing in the prior art, the purpose of the present application is to provide a limestone slurry pulping equipment for flue gas desulfurization in a thermal power plant.

[0006] To solve the above problems, the present application adopts the following technical solutions.

[0007] The utility model provides a kind of limestone slurry for thermal power plant flue gas desulfurization is made into pulp equipment, including crushing bin body, the lower surface of the crushing bin body is fixedly connected with pulp bin, the edge of the upper surface of the pulp bin is communicated with water inlet, the outer surface of the crushing bin body is fixedly connected with motor base near top, the upper surface of the motor base is fixedly connected with second driving motor, the output end of the second driving motor is fixedly connected with rotating shaft, the inner surface of the crushing bin body middle is connected with the crushing assembly for crushing, the crushing assembly is connected with the filter assembly for collecting solid.

[0008] The crushing assembly includes a grinding frame fixed to the inner surface of the crushing bin body and a hopper frame fixed to the bottom of the rotating shaft, the inner surface of the grinding frame is symmetrically fixedly connected with a fixed plate, three through slots are formed in the inner portion of the fixed plate, the lower surface of the hopper frame is fixedly connected with a grinding block, four groups of crushing plates are uniformly fixedly connected to the outer surface of the hopper frame, and a mesh plate is uniformly formed on the upper surface of the hopper frame.

[0009] Optionally, the grinding block is located inside the grinding frame and is adapted to slide with each other, each group of the crushing plates is three in number and is arranged from top to bottom, the crushing plates are adapted to the through slots, the inner surface of the crushing bin body near the top is connected with an impact assembly, and the edge of the upper surface of the crushing bin body is connected with a dust suction assembly.

[0010] Optionally, the impact assembly includes two first driving motors fixed to the outer surface of the crushing bin body, an annular rack rotatably connected to the inner surface of the crushing bin body near the top, and two extrusion plates sliding on the inner surface of the crushing bin body, the output end of the first driving motor extends into the interior of the crushing bin body and is fixedly connected with a gear, the inner surface of the annular rack is symmetrically fixedly connected with a moving plate, the upper surface of the extrusion plate is fixedly connected with a trapezoidal block, and two rows of crushing cones are fixedly connected to the lower surface of the extrusion plate.

[0011] Optionally, the gear is meshed with the annular rack, the moving plate is located above the extrusion plate, and the extrusion plate is connected with the crushing bin body through a vertical sliding groove.

[0012] Optionally, the dust suction assembly includes a support frame fixed to the edge of the upper surface of the crushing bin body, two first air pumps fixed to the upper surface of the pulp bin, and a second air pump fixed to the upper surface of the grinding block, the upper surface of the support frame is fixedly connected with a suction frame, a plurality of air inlets are uniformly formed in the lower surface of the suction frame, a first flow guide pipe is communicated with the upper surface of the suction frame, the output end of the first air pump is connected with a second flow guide pipe, and the input end of the second air pump is fixedly connected with an air inlet sleeve.

[0013] Optionally, the other end of the first flow guide pipe is connected with the input end of the first air pump, and the other end of the second flow guide pipe extends into the interior of the pulp bin.

[0014] Optionally, the filtering assembly comprises a fixed sleeve fixed on the outer surface of the grinding frame and a transmission shaft fixed on the bottom of the air inlet sleeve, the outer surface of the fixed sleeve is slidingly connected with a filter screen frame, the outer surface of the filter screen frame is symmetrically connected with a support shaft, the bottom of the transmission shaft is fixedly connected with four stirring blades, and the top of the stirring blades is fixedly connected with a triangular block.

[0015] Optionally, the bottom of the transmission shaft extends into the inside of the filter screen frame, the stirring blades are located below the filter screen frame, the bottom of the air inlet sleeve extends through the grinding block to the inside of the filter screen frame and is fixedly connected with the top of the transmission shaft, and the outer surface of the air inlet sleeve is connected with a purification assembly.

[0016] Optionally, the purification assembly comprises an annular frame sleeved on the outer surface of the air inlet sleeve and an opening formed in the outer surface of the air inlet sleeve, the outer surface of the annular frame is communicated with four air inlet pipes, and one side of the air inlet pipe is fixedly connected with a purification filter element.

[0017] Optionally, one side of the air inlet pipe penetrates through the fixed sleeve, the purification filter element is located in the inside of the pulping bin, and the opening is located in the inside of the annular frame.

[0018] Compared with the prior art, the technical scheme provided by the present application has at least the following beneficial effects:

[0019] In the above scheme, the crushing assembly is provided to crush the limestone into small particles, the small particles fall between the grinding frame and the grinding block, and the rotating grinding block grinds the small particles into powder, so that the grinding block can crush and grind the limestone at the same time when rotating, the grinding and crushing can be synchronized, the particles of different sizes can be ground into limestone powder with the same size, and the large particles cannot be mixed in the powder, thereby ensuring the quality during subsequent pulping.

[0020] The impact assembly is provided, the crushing cone crushes the limestone into smaller stone blocks, so that the small stone blocks after crushing fall smoothly between the grinding frame and the grinding block for grinding, more stone blocks cannot be accumulated in the inside of the crushing bin body and cannot be crushed, the equipment in the inside of the crushing bin body is prevented from being stuck and loaded, and the service life of the equipment is improved.

[0021] The dust suction assembly is provided, a strong suction force is generated at the air inlet, the floating limestone dust is adsorbed, an air curtain is formed between the air suction frame and the hopper-shaped frame, the limestone powder is blocked by the air curtain and cannot diffuse to the outside, the adsorption effect of the air inlet is further improved, the absorbed limestone powder is transported to the inside of the pulping bin through the cooperation of the first air pump and the second flow guide pipe, the waste of the limestone raw material is reduced, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the pertinent art to make and use the application.

[0023] Figure 1 is a structural schematic diagram of the present application;

[0024] Figure 2 is a sectional structural schematic diagram of the present application;

[0025] Figure 3 is a structural schematic diagram of the fixing plate of the present application;

[0026] Figure 4 is a structural schematic diagram of the impact assembly of the present application Figure 1 ;

[0027] Figure 5 is a structural schematic diagram of the impact assembly of the present application Figure 2 ;

[0028] Figure 6 is a structural schematic diagram of the dust suction assembly of the present application;

[0029] Figure 7 is a structural schematic diagram of the filter assembly of the present application;

[0030] Figure 8 is a structural schematic diagram of the purification assembly of the present application.

[0031] [Reference Signs]

[0032] 1, crushing chamber; 2, pulping chamber; 3, water inlet; 4, motor base;

[0033] 5, crushing assembly; 51, grinding frame; 52, grinding block; 53, hopper frame; 54, fixing plate; 55, crushing plate;

[0034] 56, impact assembly; 561, first driving motor; 562, gear; 563, annular rack; 564, moving plate; 565, extrusion plate; 566, crushing cone; 567, trapezoidal block;

[0035] 57, dust suction assembly; 571, support frame; 572, air suction frame; 573, air inlet; 574, first flow guide pipe; 575, first air pump; 576, second flow guide pipe; 577, second air pump; 578, air inlet sleeve;

[0036] 58, through slot; 59, mesh plate;

[0037] 6, filter assembly; 61, fixing sleeve; 62, filter screen frame; 63, stirring blade; 64, triangular block; 65, support shaft;

[0038] 66, purification assembly; 661, annular frame; 662, purification filter element; 663, air inlet pipe; 664, opening;

[0039] 67, transmission shaft;

[0040] 7, second driving motor; 8, rotating shaft.

[0041] As shown in the drawings, in order to clearly show the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0042] The present application will be described in detail below with reference to the drawings and specific embodiments. It should be noted that in order to make the embodiments more detailed, the following embodiments are the best, preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement them; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0043] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to implement such a feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0044] Generally, the terms can be understood at least in part from the context of their usage. For example, depending at least in part upon the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics. In addition, the term "based on" can be understood as not necessarily of a set of exclusive factors, but instead, can allow for existence of additional factors not necessarily explicitly described, again, depending at least in part on the context.

[0045] It is to be understood that the terms "on", "above", and "upper" in the context of "on", "above", and "upper" are to be interpreted in the broadest reasonable manner, such that "on" encompasses both "directly on" and also "on", but with intervening features or layers, and "above" or "upper" encompasses both "above" or "upper" but with no intervening features or layers, and also "above" or "upper" but with intervening features or layers.

[0046] In addition, spatially relative terms, such as "under", "below", "lower", "on", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0047] As shown in Figures 1 to 8 The embodiment of the present application provides a limestone slurry preparation equipment for flue gas desulfurization of thermal power plant, which comprises a crushing bin body 1, a slurry preparation bin 2 is fixedly connected to the lower surface of the crushing bin body 1, a water inlet 3 is communicated to the edge of the upper surface of the slurry preparation bin 2, a motor seat 4 is fixedly connected to the outer surface of the crushing bin body 1 close to the top, a second driving motor 7 is fixedly connected to the upper surface of the motor seat 4, a rotating shaft 8 is fixedly connected to the output end of the second driving motor 7, a crushing assembly 5 for crushing is connected to the middle of the inner surface of the crushing bin body 1, and a filtering assembly 6 for collecting solid objects is connected to the crushing assembly 5.

[0048] As shown in Figure 2 and Figure 3 The crushing assembly 5 comprises a grinding frame 51 fixed to the middle of the inner surface of the crushing bin body 1 and a hopper frame 53 fixed to the bottom of the rotating shaft 8, the inner surface of the grinding frame 51 is fixedly connected with a fixed plate 54 in a symmetrical mode, three through grooves 58 are formed in the inner part of the fixed plate 54, the lower surface of the hopper frame 53 is fixedly connected with a grinding block 52, four groups of crushing plates 55 are fixedly connected to the outer surface of the hopper frame 53 in a uniform mode, and mesh plates 59 are arranged on the upper surface of the hopper frame 53 in a uniform mode.

[0049] The grinding block 52 is located in the inner part of the grinding frame 51 and is adapted to slide with each other, the number of each group of crushing plates 55 is three, the crushing plates 55 are arranged from top to bottom in sequence, the crushing plates 55 are adapted to the through grooves 58, the inner surface of the crushing bin body 1 close to the top is connected with an impact assembly 56, and a dust suction assembly 57 is connected to the edge of the upper surface of the crushing bin body 1.

[0050] The limestone is poured into the inside of the crushing bin body 1, the second drive motor 7 is started to drive the rotating shaft 8 to rotate, the rotating shaft 8 drives the bucket frame 53 and the grinding block 52 to rotate at high speed, the limestone slides from the surface of the bucket frame 53 to the grinding frame 51 and the bucket frame 53, when the bucket frame 53 drives multiple groups of crushing plates 55, the limestone is pushed to the fixed plate 54 and contacted when rotating, the limestone is impacted and crushed into small particles by the high-speed rotating crushing plate 55, the small particles fall between the grinding frame 51 and the grinding block 52, and the grinding block 52 rotates to grind the small particles into powder, so that the grinding block 52 can impact and crush the limestone while grinding when rotating, and the grinding and crushing can be synchronized, so that the limestone powder of different sizes can be ground into limestone powder of the same size, and the large particles cannot be mixed in the powder, so that the quality of the subsequent pulp making can be ensured.

[0051] As shown in Figure 4 and Figure 5 , the impact assembly 56 includes two first drive motors 561 fixed on the outer surface of the crushing bin body 1, an annular rack 563 rotatably connected to the inner surface of the crushing bin body 1 near the top, and two extrusion plates 565 sliding on the inner surface of the crushing bin body 1, the output end of the first drive motor 561 extends into the inside of the crushing bin body 1 and is fixedly connected with a gear 562, the inner surface of the annular rack 563 is fixedly connected with a moving plate 564, the upper surface of the extrusion plate 565 is fixedly connected with a trapezoidal block 567, and the lower surface of the extrusion plate 565 is fixedly connected with two rows of crushing cones 566.

[0052] The gear 562 is engaged with the annular rack 563, the moving plate 564 is located above the extrusion plate 565, and the extrusion plate 565 is connected with the crushing bin body 1 through a vertical sliding groove.

[0053] When the limestone enters the inside of the crushing bin body 1, the limestone with a larger diameter cannot fall between the grinding frame 51 and the grinding block 52, but continuously rolls between the bucket frame 53 and the crushing bin body 1, at this time the first drive motor 561 is started to drive the gear 562 to rotate, the gear 562 drives the annular rack 563 engaged therewith to rotate, the annular rack 563 simultaneously drives the two moving plates 564 to rotate, the moving plate 564 relatively slides towards the oblique edge of the trapezoidal block 567, the moving plate 564 pushes the trapezoidal block 567 and the extrusion plate 565 downward at high speed, the extrusion plate 565 drives the multiple crushing cones 566 to move downward, the crushing cones 566 impact the limestone, and the crushing cones 566 crush the limestone into smaller stones, so that the small stones after crushing fall between the grinding frame 51 and the grinding block 52 for grinding, avoiding more stones to be accumulated in the inside of the crushing bin body 1 and cannot be crushed, causing the crushing bin body 1 to be stuck and loaded, and improving the service life of the equipment.

[0054] AsFigure 2 , Figure 6 and Figure 8 As shown, the dust collection assembly 57 includes a support frame 571 fixed at the edge of the upper surface of the crushing chamber 1, two first air pumps 575 fixed on the upper surface of the pulping chamber 2, and a second air pump 577 fixed on the upper surface of the grinding block 52. The upper surface of the support frame 571 is fixedly connected to the suction frame 572, and the lower surface of the suction frame 572 is evenly provided with multiple air inlets 573. The upper surface of the suction frame 572 is connected to a first guide pipe 574. The output end of the first air pump 575 is connected to the second guide pipe 576, and the input end of the second air pump 577 is fixedly connected to the air inlet sleeve 578.

[0055] The other end of the first guide pipe 574 is connected to the input end of the first air pump 575, and the other end of the second guide pipe 576 extends into the interior of the pulping chamber 2.

[0056] In practice, crushing dry limestone generates a large amount of dust, which can spread to the surrounding area and pose a health hazard if inhaled by workers. Simultaneously, the limestone dust pollutes the environment. Therefore, two first air pumps 575 are activated. The first air pump 575 draws air from the inside of the first guide pipe 574, which is connected to the suction frame 572, creating a strong suction at the air inlet 573 to adsorb the scattered limestone dust. Simultaneously, the second air pump 577 blows air into the inside of the bucket-shaped frame 53. The airflow is ejected outwards through the mesh plate 59, perpendicular to the surface of the suction frame 572, thus forming an air curtain between the suction frame 572 and the bucket-shaped frame 53. The limestone dust is blocked from spreading outwards by this air curtain, further improving the adsorption effect of the air inlet 573. The absorbed limestone dust is then transported to the water inside the pulping tank 2 through the combined action of the first air pump 575 and the second guide pipe 576, reducing the waste of limestone raw materials and saving costs.

[0057] like Figure 7 and Figure 8 As shown, the filter assembly 6 includes a fixed sleeve 61 fixed to the outer surface of the grinding frame 51 and a drive shaft 67 fixed to the bottom of the air intake sleeve 578. A filter screen frame 62 is slidably connected to the outer surface of the fixed sleeve 61, and a support shaft 65 is symmetrically connected to the outer surface of the filter screen frame 62. Four stirring blades 63 are fixedly connected to the bottom of the drive shaft 67, and a triangular block 64 is fixedly connected to the top of the stirring blades 63.

[0058] The bottom of the drive shaft 67 extends out of the interior of the filter frame 62, the stirring blade 63 is located below the filter frame 62, the bottom of the air inlet sleeve 578 extends through the grinding block 52 to the interior of the filter frame 62 and is fixedly connected to the top of the drive shaft 67, and the outer surface of the air inlet sleeve 578 is connected to the purification component 66.

[0059] When the limestone ground into powder enters the inside of the filter frame 62 through the fixed sleeve 61, because the filter frame 62 is in the water in the inside of the pulp bin 2, the limestone powder contacts the water to form the lime slurry in the inside of the filter frame 62, the water-insoluble solid in the limestone powder is blocked by the filter frame 62 and collected, so that the solid does not contaminate the inside of the limestone slurry and affect the quality of the limestone slurry, meanwhile, the air inlet sleeve 578 rotates with the grinding block 52, drives the transmission shaft 67 to rotate, the transmission shaft 67 drives the four stirring blades 63 to rotate, the liquid in the inside of the pulp bin 2 can be stirred, so that the limestone powder and the water are more fully mixed, meanwhile, the bevel edge of the triangular block 64 gradually approaches the supporting shaft 65 and slides with each other, the triangular block 64 lifts the supporting shaft 65 upward, so that the filter frame 62 moves upward outside the fixed sleeve 61, when the triangular block 64 passes through the supporting shaft 65, the filter frame 62 descends, so as to continuously shake the filter frame 62, so that the impurities blocked in the mesh hole of the filter frame 62 are shaken off, and the flowability of the filter frame 62 is ensured.

[0060] As shown in Figure 8 The purification assembly 66 comprises an annular frame 661 sleeved on the outer surface of the air inlet sleeve 578 and an opening 664 formed in the outer surface of the air inlet sleeve 578, the outer surface of the annular frame 661 is communicated with four air inlet pipes 663, and the air inlet pipe 663 is fixedly connected with a purification filter element 662 on one side.

[0061] One side of the air inlet pipe 663 penetrates the fixed sleeve 61, and the purification filter element 662 is located in the inside of the pulp bin 2, and the opening 664 is located in the inside of the annular frame 661.

[0062] When the limestone reacts with water to produce a large amount of pungent odor, the second air pump 577 is working to suck the air inlet sleeve 578, the gas in the inside of the purification filter element 662 enters the inside of the air inlet pipe 663, and the purification filter element 662 purifies the gas to remove the odor, so that the gas sprayed by the second air pump 577 is safe without odor.

[0063] The technical scheme provided by the present application has the following working process:

[0064] Firstly, the second driving motor 7 is opened to drive the grinding block 52 to rotate through the transmission, the grinding block 52 breaks and grinds the limestone, the impact assembly 56 can break the limestone with a larger diameter, and the dust suction assembly 57 can adsorb the powder generated during the breaking to reduce the powder pollution of the surrounding environment.

[0065] Then, the filter frame 62 can collect the water-insoluble solid to avoid affecting the quality of the limestone slurry, the filter frame 62 is shaken under the cooperation of the triangular block 64 and the supporting shaft 65 to ensure the flowability of the filter frame 62, and the purification assembly 66 purifies the gas generated by the reaction of the limestone powder and water.

[0066] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0067] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A limestone slurry preparation device for flue gas desulfurization in a thermal power plant, comprising a crushing bin body, a slurry preparation bin fixedly connected to the lower surface of the crushing bin body, a water inlet communicated with the edge of the upper surface of the slurry preparation bin, a motor base fixedly connected to the outer surface of the crushing bin body near the top, a second driving motor fixedly connected to the upper surface of the motor base, and a rotating shaft fixedly connected to the output end of the second driving motor. characterized in that A crushing assembly for crushing is connected to the middle of the inner surface of the crushing bin body, and a filtering assembly for collecting solid objects is connected to the crushing assembly. The crushing assembly comprises a grinding frame fixedly connected to the middle of the inner surface of the crushing bin body and a hopper frame fixedly connected to the bottom of the rotating shaft, the inner surface of the grinding frame is fixedly connected to a fixed plate in a symmetrical manner, three through grooves are formed in the fixed plate, the lower surface of the hopper frame is fixedly connected to a grinding block, the outer surface of the hopper frame is fixedly connected to four groups of crushing plates in a uniform manner, and the upper surface of the hopper frame is uniformly provided with a mesh plate. A dust collection assembly is connected to the edge of the upper surface of the crushing bin body. The dust collection assembly comprises a support frame fixedly connected to the edge of the upper surface of the crushing bin body, two first air pumps fixedly connected to the upper surface of the slurry preparation bin, and a second air pump fixedly connected to the upper surface of the grinding block, the upper surface of the support frame is fixedly connected to a suction frame, a plurality of air inlets are uniformly formed in the lower surface of the suction frame, a first flow guide pipe is communicated with the upper surface of the suction frame, a second flow guide pipe is connected to the output end of the first air pump, and an air inlet sleeve is fixedly connected to the input end of the second air pump. The other end of the first flow guide pipe is connected to the input end of the first air pump, and the other end of the second flow guide pipe extends into the interior of the slurry preparation bin. The filtering assembly comprises a fixed sleeve fixedly connected to the outer surface of the grinding frame and a transmission shaft fixedly connected to the bottom of the air inlet sleeve, the outer surface of the fixed sleeve is slidingly connected to a filter screen frame, the outer surface of the filter screen frame is symmetrically connected to a support shaft, the bottom of the transmission shaft is fixedly connected to four stirring blades, and the top of the stirring blades is fixedly connected to a triangular block. The bottom of the transmission shaft extends into the interior of the filter screen frame, the stirring blades are located below the filter screen frame, the bottom of the air inlet sleeve extends through the grinding block to be fixedly connected to the top of the transmission shaft, and a purification assembly is connected to the outer surface of the air inlet sleeve.

2. The limestone slurry preparation device for flue gas desulfurization in a thermal power plant according to claim 1, characterized by, The grinding block is located in the interior of the grinding frame and is adapted to slide with each other, the number of each group of the crushing plates is three, the crushing plates are arranged from top to bottom in sequence, the crushing plates are adapted to the through grooves, and an impact assembly is connected to the inner surface of the crushing bin body near the top.

3. The limestone slurry preparation device for flue gas desulfurization in a thermal power plant according to claim 2, characterized by, The impact assembly comprises two first driving motors fixedly connected to the outer surface of the crushing bin body, an annular rack rotatably connected to the inner surface of the crushing bin body near the top, and two extrusion plates slidingly connected to the inner surface of the crushing bin body, the output end of the first driving motor extends into the interior of the crushing bin body and is fixedly connected to a gear, the inner surface of the annular rack is fixedly connected to a moving plate in a symmetrical manner, the upper surface of the extrusion plate is fixedly connected to a trapezoidal block, and two rows of crushing cones are fixedly connected to the lower surface of the extrusion plate.

4. The limestone slurry preparation device for flue gas desulfurization in a thermal power plant according to claim 3, characterized by, The gear is engaged with the annular rack, the moving plate is located above the extrusion plate, and the extrusion plate is connected to the crushing bin body through a vertical sliding groove.

5. The limestone slurry preparation device for flue gas desulfurization in a thermal power plant according to claim 4, characterized by, The purification assembly comprises an annular frame sleeved on the outer surface of the air inlet sleeve and an opening hole formed on the outer surface of the air inlet sleeve, and the outer surface of the annular frame is communicated with four air inlet pipes.

6. The limestone slurry preparation device for flue gas desulfurization in a thermal power plant according to claim 5, characterized by, One side of the air inlet pipe penetrates through the fixed sleeve, the purification filter element is located in the interior of the pulp bin, and the opening hole is located in the interior of the annular frame.

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