CN217829984U

CN217829984U - Lime slurrying groove

Info

Publication number: CN217829984U
Application number: CN202221336294.1U
Authority: CN
Inventors: 陶政修; 谢红斌
Original assignee: Zhuzhou Jingzhuo Technology Co ltd
Current assignee: Zhuzhou Bohui Environmental Protection Co.,Ltd.
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-11-18
Anticipated expiration: 2032-05-31

Abstract

The utility model relates to the technical field of low-concentration sulfur dioxide flue gas treatment equipment, in particular to a lime slurrying tank, which comprises a tank bottom and a tank body extending upwards from the outer side part of the tank bottom, wherein the tank bottom and the tank body enclose and form a stirring cavity; the lime slurrying tank also comprises a feeding mechanism and a stirring mechanism which extend into the stirring cavity from the upper part of the stirring cavity, and a rotary basket mechanism is arranged between the feeding mechanism and the stirring mechanism; the rotating basket mechanism comprises a rotating basket body and a rotating basket driving piece, the rotating basket body is located below a discharge port in the feeding mechanism, and the bottom and the lateral portion of the rotating basket body are both provided with drainage through holes. Carry out the pulp through changeing basket mechanism and rabbling mechanism jointly to lime powder, can with lime powder fast dispersion to rotating the thick liquid in, can transmit hydration reaction's heat uniformly, eliminate the formation condition that lime reunited, effectively prevent lime reunion and the caking deposit, can guarantee the even stability of thick liquid composition, improve the effect of lime pulp.

Description

Lime slurrying groove

Technical Field

The utility model relates to a lime slurrying groove belongs to low concentration sulfur dioxide flue gas treatment device technical field.

Background

In the non-ferrous metal smelting process, part of the flue gas produced by the high-temperature kiln contains sulfur dioxide gas, the concentration of the sulfur dioxide gas is usually 0.05-5.0%, and the flue gas is called low-concentration sulfur dioxide gas. In view of the limitation of the prior art, low-concentration sulfur dioxide gas cannot be used for preparing industrial sulfuric acid, and if the low-concentration sulfur dioxide gas is directly discharged outwards, the low-concentration sulfur dioxide gas directly pollutes air and then is converted into local acid rain to further pollute soil, so that the low-concentration sulfur dioxide gas needs to be subjected to harmless or resource treatment before being discharged.

At present, the overall principle of low-concentration sulfur dioxide gas treatment is to use an absorbent to absorb sulfur dioxide gas in flue gas, and the absorbent is divided into a lime method, a limestone powder method, a sodium alkali absorption method, a double alkali method, an ammonia water absorption method, an ammonium carbonate absorption method, a zinc oxide absorption method, a magnesium oxide absorption method, an alumina absorption method, a manganese dioxide oxidation absorption method, a hydrogen peroxide oxidation absorption method, an organic amine absorption method, an activated carbon adsorption catalytic oxidation method, a rare earth adsorption catalytic oxidation method and the like from chemical components. The lime slurry absorption method for treating the low-concentration sulfur dioxide gas has the advantages of clear process principle, compact equipment structure, wide absorbent source, high absorption efficiency, low cost consumption, no secondary pollutant generation and the like, and is one of the most commonly used methods for treating the low-concentration sulfur dioxide gas at present.

The method for treating low-concentration sulfur dioxide gas by using lime slurry absorption method has two main technological processes, namely absorption process and oxidation process. In the absorption process, lime is dissolved in water and is converted into slaked lime, the slaked lime is electrolyzed to generate hydroxide ions and calcium ions, the hydroxide ions and the calcium ions respectively react with hydrogen ions and sulfurous acid ions generated by sulfur dioxide gas dissolved in the water, and the calcium sulfite hemihydrate solid precipitate is generated while acid-base neutralization is completed, so that the absorption reaction is completely carried out; in the oxidation process, the calcium sulfite hemihydrate solid is oxidized into calcium sulfate dihydrate solid by oxygen in the air, the calcium sulfate dihydrate is filtered and separated to obtain an industrial desulfurized gypsum product, and the industrial desulfurized gypsum product is usually sold to the cement industry as a cement retarder for blending.

According to the quality requirement of the industrial desulfurized gypsum product, the effective content of calcium sulfate dihydrate in the desulfurized gypsum produced after oxidation must reach 95%, and the main reason for causing the unqualified industrial desulfurized gypsum in the industrial production process is that part of lime directly enters the desulfurized gypsum product without participating in absorption reaction. In order to improve the absorption speed of lime, lime is generally pulped by adopting a pulping liquid absorption mode, but the lime has small particle size and too high hydration reaction speed of the lime, a large amount of heat can be released in the pulping process, so that part of the lime is agglomerated at high temperature in the pulping process to form blocks which cannot be uniformly dispersed in tap water, the agglomerated blocks cannot effectively contact a water solvent in the absorption process, hydroxide ions and calcium ions are not ionized, the agglomerated blocks cannot contact sulfur dioxide gas, and finally the agglomerated blocks do not participate in the absorption reaction, so the agglomerated blocks directly enter a gypsum product in the form of calcium oxide, and finally the desulfurized gypsum product is unqualified.

To sum up, how to design a lime slurrying tank capable of uniformly stirring and slurrying lime to avoid lime agglomeration and unqualified desulfurized gypsum is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lime slurrying groove carries out the pulp through changeing basket mechanism and rabbling mechanism jointly to lime powder, can avoid lime reunion and the deposit of caking, guarantees the even stability of thick liquid composition, improves the effect of lime pulp.

In order to achieve the above object, the utility model provides a following technical scheme: a lime slurrying tank comprises a tank bottom and a tank body extending upwards from the outer side of the tank bottom, wherein a stirring cavity is formed by the tank bottom and the tank body in a surrounding manner; the lime slurrying tank also comprises a feeding mechanism and a stirring mechanism which extend into the stirring cavity from the upper part of the stirring cavity, and a rotary basket mechanism is arranged between the feeding mechanism and the stirring mechanism; the rotary basket mechanism comprises a rotary basket body and a rotary basket driving piece for driving the rotary basket body to rotate, the rotary basket body is positioned below the discharge port in the feeding mechanism, and the bottom and the side part of the rotary basket body are provided with drainage through holes; lime powder that treats that feeding mechanism carried flows into earlier and changes this internal rethread drainage through-hole inflow stirring intracavity of stirring of this internal rethread of basket, carries out the pulp through changeing basket body and rabbling mechanism jointly to lime.

Preferably, the rotating basket body comprises a bottom wall and a side wall which is fixed at the outer end of the bottom wall and extends upwards, and a plurality of lower drainage through holes are uniformly distributed in the bottom wall; in the lower drainage through holes which are adjacent in the horizontal and vertical directions, the distance of a connecting line S1 between adjacent circle centers is 40mm-60mm.

Preferably, a plurality of lateral drainage through holes are uniformly distributed on the side wall, the lateral drainage through holes are integrally positioned at the lower part of the side wall, and the height of the lateral drainage through hole at the uppermost row is not more than two thirds of the height of the side wall; in the lower drainage through holes which are adjacent in the radial direction and the axial direction, the distance of a connecting line S2 between adjacent circle centers is 40mm-60mm.

Preferably, the rotating basket mechanism comprises a rotating shaft extending into the rotating basket body and connected with the bottom wall, the rotating basket driving part is positioned above the rotating basket body, and the power output end of the rotating basket driving part is connected with one side, far away from the bottom wall, of the rotating shaft; the rotating basket driving piece can drive the rotating basket body to rotate through the rotating shaft and stir lime powder in the rotating basket body.

Preferably, the upper end of the groove body is provided with a mounting bracket; the rotating basket driving part is located above the mounting support, and the rotating shaft penetrates through the mounting support and extends into a stirring cavity below the mounting support to be connected with the rotating basket body.

Preferably, the hopper mechanism comprises a hopper body positioned outside the rotating basket mechanism, and the hopper body comprises a feed hopper and a discharge pipe; the feeding hopper is positioned above the mounting bracket, and the discharge pipe is communicated with the lower end of the feeding hopper and penetrates through the mounting bracket to extend into the stirring cavity; the lower end discharge hole of the discharge pipe is positioned above the rotating basket body and is aligned with the inner cavity of the rotating basket body.

Preferably, the feed hopper is of a reducing structure with the inner diameter gradually reduced from top to bottom, and specifically comprises an outer inclined wall section and an inner inclined wall section; the included angles between the outer oblique wall section and the upper end face of the mounting bracket and between the inner oblique wall section and the upper end face of the mounting bracket are respectively alpha and beta, and alpha is less than beta.

Preferably, the outer inclined wall section extends outwards to a position above the upper end face of the groove body; the discharging pipe is an inclined pipe structure which inclines towards the upper part of the inner side direction rotating basket body.

Preferably, the stirring mechanism comprises a stirring motor positioned above the mounting bracket, a stirring shaft connected with the power output end of the stirring motor and penetrating into the stirring cavity, and stirring blades connected to the lower end of the stirring shaft; the central axis of the stirring shaft coincides with the central axis of the lime slurrying tank, and the stirring sheet is arranged close to the tank bottom.

Preferably, at least two rotating basket mechanisms and a feeding mechanism for feeding materials into the rotating basket body are arranged on the outer side of the stirring mechanism.

The beneficial effects of the utility model are that:

1. the lime powder that treats that feeding mechanism carried flows into earlier and changes this internal rethread drainage through-hole inflow stirring intracavity of stirring of basket, carries out the pulpiness to lime through changeing basket body and rabbling mechanism jointly, can with lime powder fast dispersion to rotating the thick liquid in, can transmit hydration reaction's heat uniformly, eliminate the formation condition that lime reunited, effectively prevent lime reunion and the caking deposit, can guarantee the even stability of thick liquid composition, improve the effect of lime pulpiness.

2. The operation is simple and convenient: the utility model provides a lime slurrying groove only need fix on simple and easy support when the installation, in the course of the work, the output of mixer, stirring speed are fixed unchangeable, and the motor output of commentaries on classics basket mechanism, rotation speed also are fixed unchangeable, do not need operating personnel to adjust, on-the-spot operating personnel only need reasonable control lime the rate of addition and the rate of addition of running water can, easy and simple to handle.

3. The operation is stable: the utility model provides a lime slurrying groove is central symmetry equipment, and in the course of the work, although the (mixing) shaft of rabbling mechanism and the pivot of change basket mechanism are rotating, nevertheless total resultant force and total resultant moment in slurrying groove are zero, and the slurrying groove is in relative quiescent state, can not produce vibration or turbulence, can maintain for a long time and stabilize normal operation.

4. The lime slurrying effect is good: the utility model provides a lime slurrying groove compact structure, the flow direction is reasonable, at the pulp in-process of lime, the lime powder of joining carries out effective "filtration" and "stationary flow" through high-speed rotatory basket mechanism, can enough ensure that lime sees through the drainage through-hole with the form of granule less, prevent that the lime aggregate of great piece from getting into the stirring intracavity in the slurrying groove, and simultaneously, can make the lime tiny particle cushion in basket mechanism changes, see through the through-hole and enter into the stirring intracavity with "more even" speed, can play the effect of adjusting and stabilizing lime powder joining speed, the lime that enters into the stirring intracavity like this is even, the tiny particle that does not reunite, when these are even, when the tiny particle lime that does not reunite enters into stirring intracavity portion, can be at the (mixing) shaft, under the effect of stirring piece and rotation thick liquid, quick dispersion is to rotating in the thick liquid, can transmit hydration reaction's heat more uniformly, eliminate the formation condition that the lime reunited, effectively prevent lime reunion again and deposit, guarantee the even stability of thick liquid composition.

Drawings

FIG. 1 is a schematic diagram of a lime slurrying tank configuration.

Fig. 2 is a schematic structural diagram of the spin basket mechanism.

Fig. 3 is a schematic structural view of the spin basket body.

Fig. 4 is a structural schematic view of the bottom wall of the spin basket body.

Fig. 5 is a schematic structural view of the hopper mechanism.

Description of reference numerals:

1. the bottom of the tank; 2. a tank body; 3. a stirring chamber; 4. a feeding mechanism; 6. A basket rotating mechanism; 7. a spin basket body; 8. a spin basket drive; 9. a rotating shaft; 10. a bottom wall; 11. a side wall; 12. a lower drainage through hole; 13. a lateral drainage through hole; 14. mounting a bracket; 16. A feed hopper; 17. a discharge pipe; 18. an outer diagonal wall section; 19. an inner diagonal wall segment; 20. a stirring motor; 21. a stirring shaft; 22. and (4) stirring the tablets.

Detailed Description

The present invention is described in further detail below with reference to fig. 1-5. The inner side is referred to hereinafter as the side close to the central axis L of the lime slurrying trough, and the outer side is referred to hereinafter as the side remote from the central axis L of the lime slurrying trough.

A lime slurrying trough comprises a trough bottom 1 and a trough body 2 extending upwards from the outer side part of the trough bottom 1, wherein a cylindrical stirring cavity 3 is formed by the trough bottom 1 and the trough body 2 in a surrounding mode; the lime slurrying tank also comprises a feeding mechanism 4 and a stirring mechanism which extend into the stirring cavity 3 from the upper part of the stirring cavity 3, and a rotary basket mechanism 6 is arranged between the feeding mechanism 4 and the stirring mechanism.

As shown in fig. 2-4, the rotating basket mechanism 6 comprises a rotating basket body 7 and a rotating basket driving member 8 for driving the rotating basket body 7 to rotate, and the rotating basket body 7 is positioned below the discharge hole in the feeding mechanism 4; the rotary basket mechanism 6 comprises a rotary shaft 9 which extends into the rotary basket body 7 and is connected with the bottom wall 10, the rotary basket driving piece 8 is positioned above the rotary basket body 7, and the power output end of the rotary basket driving piece 8 is connected with one side, far away from the bottom wall 10, of the rotary shaft 9; the rotating basket driving piece 8 can drive the rotating basket body 7 to rotate through the rotating shaft 9 and stir the lime powder in the rotating basket body 7.

The rotary basket body 7 comprises a bottom wall 10 and a side wall 11 which is welded at the outer end of the bottom wall 10 and extends upwards, and the bottom wall 10 and the side wall 11 enclose to form a stirring inner cavity of the rotary basket body 7; the bottom and the side part of the rotating basket body 7 are provided with drainage through holes, and the diameter of each drainage through hole is preferably set to be 30mm; as shown in fig. 4, a plurality of lower drainage through holes 12 are uniformly distributed on the bottom wall 10, and in the lower drainage through holes 12 adjacent to each other in the horizontal direction M and the vertical direction N, the distance of a connecting line S1 between adjacent circle centers is 40mm-60mm, preferably 50mm; a plurality of lateral drainage through holes 13 are uniformly distributed on the side wall 11, the lateral drainage through holes 13 are integrally positioned at the lower part of the side wall 11, and the height of the uppermost row of lateral drainage through holes 13 is not more than two thirds of the height of the side wall 11 shown by the line P in fig. 2, so that lime slurry which is stirred by the rotary basket mechanism 6 and can enter the stirring cavity 3 can smoothly flow into the stirring cavity 3 from the lateral drainage through holes 13, and the lime slurry which is not stirred in the rotary basket body 7 can not flow into the stirring shaft 3 from the upper part of the rotary basket body 7 in advance to influence the whole slurrying effect; as shown in fig. 3, in the lower drainage through holes 12 adjacent to each other in the radial direction E and the axial direction F, the distance of a connecting line S2 between adjacent circle centers is 40mm to 60mm, preferably 30mm; by last knowing, the rethread drainage through-hole flows into stirring chamber 3 in the rethread drainage through-hole after the slurry lime powder that treats that feeding mechanism 4 carried flows into earlier and changes basket body 7, carries out the slurry to lime jointly through changeing basket body 7 and rabbling mechanism, can improve the homogeneity of stirring, improves the slurry effect.

As shown in fig. 1, the upper end of the tank body 2 is provided with a mounting bracket 14; the rotating basket driving part 8 is positioned above the mounting bracket 14, and the rotating shaft 9 penetrates through the mounting bracket 14 and extends into the stirring cavity 3 below the mounting bracket 14 to be connected with the rotating basket body 7.

As shown in fig. 1 and 5, the hopper mechanism comprises a hopper body located outside the spin basket mechanism 6, the hopper body comprising a feed hopper 16 and a discharge pipe 17; the feed hopper 16 is positioned above the mounting bracket 14, and the discharge pipe 17 is communicated with the lower end of the feed hopper 16 and penetrates through the mounting bracket 14 to extend into the stirring cavity 3; a discharge port at the lower end of the discharge pipe 17 is positioned above the spin basket body 7 and aligned with the inner cavity of the spin basket body 7; the feed hopper 16 is of a reducing structure with gradually reduced inner diameter from top to bottom, and specifically comprises an outer inclined wall section 18 and an inner inclined wall section 19, the included angles between the outer inclined wall section 18 and the upper end face of the mounting bracket 14 and the included angles between the inner inclined wall section 19 and the upper end face of the mounting bracket 14 are respectively alpha and beta, alpha is less than beta, the outer inclined wall section 18 is positioned at the outer side material receiving position, alpha is smaller, so that the outer inclined wall section 18 is smoother, lime powder can conveniently enter, and beta is larger, so that the inner inclined wall section 19 is steeper, so that the lime powder can be prevented from falling out during feeding; the outer oblique wall section 18 extends outwards to the upper part of the upper end face of the tank body 2 so as to be matched with a feeding device outside the tank body 2 for receiving materials; discharging pipe 17 is the pipe chute structure of slope towards inboard side spin basket body 7 top to in the lime powder that comes in flow into spin basket body 7 more fast, accelerate feed rate, prevent to block up.

The stirring mechanism comprises a stirring motor 20 positioned above the mounting bracket 14, a stirring shaft 21 connected with the power output end of the stirring motor 20 and penetrating into the stirring cavity 3, and a stirring sheet 22 connected with the lower end of the stirring shaft 21, wherein the stirring motor 20 can drive the stirring shaft 21 and the stirring sheet 22 to rotate and stir lime; the axis L of (mixing) shaft 21 coincides with the axis L of lime slurrying groove, and stirring piece 22 is close to tank bottom 1 and sets up, and the lime to tank bottom 1 that can be better stirs prevents that the thick liquids on the tank bottom 1 from piling up the jam.

At least two rotating basket mechanisms 6 and a feeding mechanism 4 for feeding materials into the rotating basket body 7 are arranged on the outer side of the stirring mechanism so as to better feed materials and stir lime powder; in this embodiment, the device comprises two rotating basket mechanisms 6 and a feeding mechanism 4 arranged in cooperation with the rotating basket mechanisms 6.

When in use, the flow rate is 20m ³ A tap water delivery pump with a delivery lift of 25m and a power of 3kW delivers tap water into a lime slurrying tank, a stirring mechanism and 2 rotating basket mechanisms 6 of the lime slurrying tank are started, quicklime powder with an effective content of 88% is added into a hopper body 16 at a speed of 3.5t/h, the lime enters a rotating basket body 7 along a feeding pipe 17, and is stirred in the rotating basket body 7 and then further flows into a stirring cavity 3 through a drainage through hole; after the lime is added, stirring is continuously carried out for 1 hour, so that the lime small particles are highly dispersed into the slurry to form uniform lime slurry with the solid content of 10%, and the rotating basket mechanism 7 is closed; finally, the flow rate is 10m ³ And a lime slurry conveying pump with the delivery lift of 35m and the power of 2.2kW conveys the lime slurry into the absorption tower for use at the speed of 10t/h, and the stirring driving part 20 is closed after the lime slurry is conveyed.

The working principle of the utility model is as follows:

firstly, add the lime powder into feeder hopper 16, the lime powder enters into spin basket body 7 along discharging pipe 17 and mixes with the thick liquid in spin basket body 7, because at work, spin basket body 7 is in high-speed rotation state, can drive its inside thick liquid and make high-speed rotation, thereby make the lime powder that enters into spin basket body 7 join with the thick liquid fast, and accomplish local hydration reaction, generate calcium hydroxide granule, a small amount of calcium hydroxide dissolves in water, ionize a small amount of hydroxyl ion and calcium ion.

Then, the lime small particles and the calcium hydroxide small particles which are not dissolved continue to rotate along with the rotating basket body 7 and obtain centrifugal force, so that the lime small particles and the calcium hydroxide small particles are thrown to the edge of the rotating basket body 7 by the slurry, and because a plurality of drainage through holes are formed in the bottom wall 10 and the side wall 11 of the rotating basket body 7, the lime small particles thrown to the edge enter the stirring cavity 3 through the drainage through holes, and meanwhile, part of the slurry also enters the rotating basket body 7 from the stirring cavity 3 through the drainage through holes so as to maintain the volume balance of the rotating basket body 7; because the restriction of drainage through-hole diameter, when the granularity of the lime reunion that does not disperse is greater than drainage through-hole's size, the lime reunion can't see through drainage through-hole and get into stirring chamber 3 to constantly wash by the follow-up thick liquid that gets into in the spin basket body 7, make the granularity of lime reunion reduce gradually, the reunion volume reduces gradually, and final dissipation becomes for can see through drainage through-hole's little particulate matter or little reunion and see through drainage through-hole and enter into stirring chamber 3.

Further, under the action of the stirring mechanism, the lime small particles entering the stirring cavity 3 from the drainage through holes rotate together with the slurry in the cavity and are rapidly dispersed into the rotating slurry, then the hydration reaction is completed to generate calcium hydroxide particles, and meanwhile, part of the calcium hydroxide particles are dissolved in water to ionize fluorine oxygen ions and calcium ions;

the calcium hydroxide granules entering the stirring cavity 3 from the drainage through holes rotate together with the slurry in the cavity under the action of the stirring mechanism, are quickly dispersed into the rotating slurry, and are mostly dissolved in water to ionize fluorine oxygen ions and calcium ions;

meanwhile, the small aggregates entering the stirring cavity 3 from the drainage through holes do rotary motion with the slurry in the tank under the action of the stirring mechanism, and the small aggregates are not large in particle size and cannot be deposited at the bottom of the stirring cavity 3, and the rotary motion of the small aggregates lags behind the rotary motion of the slurry and is continuously sheared by the rotary slurry, so that the small aggregates are continuously dispersed and finally become lime small particles and are rapidly dispersed into the rotary slurry, the hydration reaction is further completed, calcium hydroxide small fruit particles are generated, a small part of the calcium hydroxide small particles are dissolved in water, and hydroxyl ions and calcium ions are ionized.

And finally, conveying the lime slurry liquid only containing the calcium hydroxide small particles, the hydroxyl ions and the calcium ions in the stirring cavity 3 to an absorption position by using a pump to absorb the sulfur dioxide gas in the flue gas.

The above embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications without inventive contribution to the embodiments of the present invention as needed after reading the present specification, but all the embodiments of the present invention are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A lime slurrying tank comprises a tank bottom (1) and a tank body (2) extending upwards from the outer side of the tank bottom (1), wherein a stirring cavity (3) is formed by the tank bottom (1) and the tank body (2) in a surrounding mode; the lime slurrying tank also comprises a feeding mechanism (4) and a stirring mechanism which extend into the stirring cavity (3) from the upper part of the stirring cavity (3), and is characterized in that a rotating basket mechanism (6) is arranged between the feeding mechanism (4) and the stirring mechanism; the rotating basket mechanism (6) comprises a rotating basket body (7) and a rotating basket driving piece (8) for driving the rotating basket body (7) to rotate, the rotating basket body (7) is positioned below a discharge hole in the feeding mechanism (4), and the bottom and the side part of the rotating basket body (7) are provided with drainage through holes; lime powder to be pulped conveyed by the feeding mechanism (4) flows into the rotating basket body (7) firstly to be stirred and then flows into the stirring cavity (3) through the drainage through holes, and lime is pulped through the rotating basket body (7) and the stirring mechanism together.

2. The lime slurrying trough according to claim 1, characterized in that the basket body (7) comprises a bottom wall (10) and a side wall (11) fixed at the outer end of the bottom wall (10) and extending upwards, and a plurality of lower drainage through holes (12) are uniformly distributed on the bottom wall (10); in the lower drainage through holes (12) which are adjacent in the horizontal and vertical directions, the distance of a connecting line S1 between adjacent circle centers is 40mm-60mm.

3. The lime slurrying trough according to claim 2, characterized in that a plurality of side drainage through holes (13) are uniformly distributed on the side wall (11), the side drainage through holes (13) are integrally positioned at the lower part of the side wall (11), and the height of the side drainage through hole (13) at the uppermost row is not more than two thirds of the height of the side wall (11); in the lower drainage through holes (12) which are adjacent in the radial direction and the axial direction, the distance of a connecting line S2 between adjacent circle centers is 40mm-60mm.

4. The lime slurrying trough of claim 3, characterized in that the basket mechanism (6) comprises a rotating shaft (9) extending into the basket body (7) and connected with the bottom wall (10), the basket driving member (8) is located above the basket body (7), and the power output end of the basket driving member (8) is connected with one side of the rotating shaft (9) far away from the bottom wall (10); the rotating basket driving piece (8) can drive the rotating basket body (7) to rotate through the rotating shaft (9) and stir the lime powder in the rotating basket body (7).

5. Lime slurrying trough according to claim 4, characterized in that the upper end of the trough body (2) is provided with a mounting bracket (14); the rotary basket driving piece (8) is located above the mounting support (14), and the rotating shaft (9) penetrates through the mounting support (14) and extends into the stirring cavity (3) below the mounting support (14) to be connected with the rotary basket body (7).

6. The lime slurrying trough according to claim 5, characterized in that the feeding mechanism (4) comprises a hopper body located outside the basket mechanism (6), the hopper body comprising a feed hopper (16) and a discharge pipe (17); the feeding hopper (16) is positioned above the mounting bracket (14), and the discharge pipe (17) is communicated with the lower end of the feeding hopper (16) and penetrates through the mounting bracket (14) to extend into the stirring cavity (3); the discharge port at the lower end of the discharge pipe (17) is positioned above the rotating basket body (7) and is aligned with the inner cavity of the rotating basket body (7).

7. The lime slurrying trough according to claim 6, characterized in that the feed hopper (16) is of a reducing construction with a gradually decreasing inner diameter from top to bottom, in particular comprising an outer inclined wall section (18) and an inner inclined wall section (19); the included angles between the outer inclined wall section (18), the inner inclined wall section (19) and the upper end face of the mounting bracket (14) are alpha and beta respectively, and alpha is less than beta.

8. The lime slurrying trough according to claim 7, characterized in that the outer inclined wall section (18) extends outwardly over an upper end face of the trough body (2); the discharge pipe (17) is of an inclined pipe structure which inclines towards the upper part of the inner side of the rotating basket body (7).

9. The lime slurrying trough according to claim 8, characterized in that the stirring mechanism comprises a stirring motor (20) located above the mounting bracket (14), a stirring shaft (21) connected with a power output end of the stirring motor (20) and penetrating into the stirring cavity (3), and a stirring sheet (22) connected to a lower end of the stirring shaft (21); the central axis of the stirring shaft (21) coincides with the central axis of the lime slurrying tank, and the stirring sheet (22) is arranged close to the tank bottom (1).

10. Lime slurrying trough according to claim 9, characterized in that at least two spin basket mechanisms (6) and a feeding mechanism (4) feeding into the spin basket body (7) are arranged outside the stirring mechanism.