CN116474627A

CN116474627A - Mixing part, sludge water coal slurry preparation system and preparation method thereof

Info

Publication number: CN116474627A
Application number: CN202310617238.8A
Authority: CN
Inventors: 董平; 孔向东
Original assignee: Ningbo Lingzhi Machinery Technology Co ltd
Current assignee: Ningbo Lingzhi Machinery Technology Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2023-07-25
Also published as: CN112295478A; CN112295478B

Abstract

The invention relates to a mixing component capable of treating residual sludge after sewage treatment with low cost and high efficiency, a sludge coal water slurry preparation system and a preparation method thereof. The sludge water-coal slurry preparation system comprises a slurry mixer for mixing the pulverized coal and the sludge slurry, wherein the front part of the slurry mixer is divided into a coal treatment device and a sludge treatment device which are respectively arranged in a 2-way; the coal treatment device sequentially comprises a crusher and a vibrating screen for crushing raw coal according to the treatment process sequence, wherein a return device for returning the raw coal which fails to pass through the screen holes to the crusher is arranged between the crusher and the vibrating screen; the sludge treatment device comprises a slurry grinder for grinding sludge into sludge slurry; the produced coal water slurry is more suitable for the combustion of a fluidized bed boiler; the stokehold pulping system can also save the transportation and storage cost and the influence on the surrounding environment.

Description

Mixing part, sludge water coal slurry preparation system and preparation method thereof

Description of the division

The original foundation of the divisional application is patent application with application number of 202010978133.1, application date of 2020, 9 and 17, and the invention name of 'a preparation method of sludge water coal slurry and a pulping system'.

Technical Field

The invention belongs to the technical field of sludge treatment and the technical field of water-coal-slurry pulping, and particularly relates to a preparation method of sludge water-coal-slurry and a pulping system of the sludge water-coal-slurry, which can treat residual sludge after sewage treatment by a sewage treatment plant which is difficult to properly treat at present with low cost and high efficiency.

Background

The fine structure of the residual sludge after sewage treatment is a flocculation reticular structure. The percentage of the weight of the water contained in the sludge to the total weight of the sludge is called the sludge water content. The water in the sludge is in the form of void water, capillary water, surface adsorption water and internal binding water. Interstitial water, about 70% of the free water in the interstices of the particles, can be separated by gravity precipitation (compaction by concentration); the surface adsorbs water, about 5%, which is water attached to the surface of the sludge particles, and the adhesive force is strong, usually appears on the solid surfaces of colloid particles, biological sludge and the like, and the water attached to the surface can be removed by a biological separation or thermal method through mutual flocculation of the colloid particles by adopting a coagulation method. The internal bound water, about 5%, is the water bound inside the sludge particles, such as the water inside cells in biological sludge, the water of crystallization carried by metal compounds in inorganic sludge, etc., and can be removed by biological separation or thermal methods. Normally, when the water content is above 85%, the sludge is in a fluid state; 65 to 85 percent of the plastic material is in a plastic state; below 60% it is solid.

Coal water slurry is a coal-based fluid fuel obtained by physical processing and is prepared by mixing about 65% of coal (including additives) and 35% of water. The coal water slurry has the advantages of high combustion efficiency, environmental protection and energy saving. The technical research work of the water-coal-slurry in China starts from the period of 'six five', and through more than 30 years of technical research and practice, at present, the water-coal-slurry preparation and application industrial system is already mature in China. As a clean coal fuel, the application of the water-coal slurry has great superiority and has very outstanding position in the national clean coal technology. The method for preparing the water-coal-slurry by mixing the sludge and the granular crushed coal is an advanced treatment method which is obtained by two steps at present, not only harmlessly consumes the sludge, but also fully utilizes the water resources in the sludge and the energy of combustible organic matters in the sludge, does not need additional water during pulping, and saves normal water resources. However, as the fine structure of the sludge is a flocculation net structure, the sludge can be automatically agglomerated into agglomeration blocks with the size when the sludge is directly mixed with the particle crushed coal, the internal water content is very high, and the sludge cannot be burnt out with the particle crushed coal if the sludge is not effectively decomposed. The main problems of the current sludge preparation of the water-coal-slurry are as follows: the sludge treated by the flocculant has great viscosity, and the net structure of the flocculant is difficult to be fully mixed with the coal slurry, so that the viscosity of the slurry is greatly improved. The sludge contains a large amount of internal water, so that the concentration and the heat value of the sludge coal water slurry are reduced, and the combustion of organic matters in the sludge is prevented, so that the coal water slurry prepared from the sludge cannot be fully combusted, the proportion of the consumed sludge of the coal water slurry is greatly limited, and the optimal effect of sludge energy utilization cannot be achieved.

ZL201910842220.1 of the applicant 2019-09-06 is named as a sludge water slurry preparation method and a sludge water slurry preparation system, and the scheme can destroy a net structure of a sludge flocculant by utilizing high-speed shearing action of raised rotating teeth and raised fixed teeth of a crushing part of a crusher so as to separate out water in the sludge; compared with the prior art, the method has great technical progress; however, since the hard particle coal and the soft sludge are continuously put into the slurry pulverizer for pulverization and mixing, the disadvantage that the direct put of the hard particle coal into the slurry pulverizer is not suitable for pulverization, and the raised rotating teeth and the raised fixed teeth of the pulverizer pulverizing part are worn out quickly due to the harder particle coal texture, so that the service life of the pulverizing part of the slurry pulverizer is lower; and the granular crushed coal also often contains stone blocks and even hard metal blocks, so that the crushing parts of the crusher are directly snapped and scrapped. In addition, as the size of the gaps between the convex rotating teeth and the convex fixed teeth of the crushing part of the slurry crusher determines the particle size of the crushed material, the sludge and the particle crushed coal are crushed together, the gaps between the convex rotating teeth and the convex fixed teeth can not fully meet the respective actual requirements of coal or sludge, and generally only comply with the particle size requirement of the coal, the gaps are not small enough for the sludge, and the precipitation of water in the sludge is insufficient.

Patent document CN110540880a discloses a method for preparing sludge coal water slurry and a stokehold pulping system, wherein the method can treat residual sludge after sewage treatment with low cost and high efficiency, and particle crushed coal with particle diameter of less than 50mm is prepared in advance, and the weight ratio of the particle crushed coal to the sludge is calculated according to the water content of the sludge; continuously shearing the granular crushed coal and the sludge into small particles with the diameter of 1mm to 5mm according to the calculated proportion, and simultaneously mixing the granular crushed coal and the sludge to prepare sludge coal water slurry consisting of 65% to 70% of solid particles and 30% to 35% of water; the high-speed shearing is utilized to thoroughly destroy the net structure of the sludge flocculant, so that water in the sludge is fully separated out, the grain size can be manually controlled, no superfine powder is produced, the ideal and consistent grain size is achieved, and the produced coal water slurry is more suitable for the combustion of a fluidized bed boiler. However, the rotor in the technical scheme belongs to an integral rotor structure, and is equivalent to a rotary vane structure which is only rotatable, and the installation influence is only due to a central hole structure at the central part of the vane, so that the technical effect of dislocation installation of the cutter head cannot be realized.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, since the applicant has studied a lot of documents and patents while making the present invention, the text is not limited to details and contents of all but it is by no means the present invention does not have these prior art features, but the present invention has all the prior art features, and the applicant remains in the background art to which the right of the related prior art is added.

Disclosure of Invention

Aiming at the technical problem, the invention provides a preparation method of sludge coal water slurry, which can treat residual sludge after sewage treatment by a sewage treatment plant which is difficult to treat at present with low cost and high efficiency; simultaneously, the sludge water-coal-slurry pulping system adopting the preparation method can treat the residual sludge after sewage treatment with low cost and high efficiency.

The technical scheme adopted by the preparation method for the sludge coal water slurry for solving the technical problems is as follows:

according to the water content of the sludge and the water content of the target sludge coal water slurry, calculating the weight ratio of the granular crushed coal to the sludge; the method is characterized in that raw coal and sludge are respectively crushed into pulverized coal and sludge slurry with target particle size, and then the pulverized coal and sludge slurry with target particle size are mixed, so that sludge coal water slurry consisting of 65-70% of solid particles and 30-35% of water is prepared. The sludge mainly refers to surplus sludge after sewage treatment in a sewage treatment plant, has great viscosity, has a fine structure of a flocculation reticular structure, contains a large amount of internal water, and is difficult to be fully mixed with coal slurry directly; the residual sludge after sewage treatment by a sewage treatment plant is generally free from other impurities and cannot damage crushing parts of the residual sludge. However, the sludge can be other similar waste materials, and the waste materials generally pollute the environment, but have certain combustion heat value, such as oil sludge, waste oil slurry, organic waste slurry, kitchen waste slurry and the like; of course, the hard impurities such as metal and stone contained therein, which may damage the pulverizing member, need to be removed in advance. The raw coal is, of course, preferably pure coal or crushed coal, but may be a slurry of coal having a sufficient combustion heat value, gangue which can be crushed into powder, or the like.

The following is a further scheme of the preparation method of the sludge coal water slurry:

before mixing the pulverized coal and the sludge slurry, respectively, crushing the raw coal into pulverized coal with a particle diameter of 1-2 mm, crushing the sludge into sludge slurry with a particle diameter of less than 1mm, and then mixing the pulverized coal with the target particle size with the sludge slurry.

Repeatedly crushing raw material coal by using a crusher, screening the raw material coal crushed by the crusher each time by using a vibrating screen with a mesh diameter of 2mm, and returning the raw material coal which is not passed through the mesh and has a particle diameter of 2mm as qualified coal dust which is not passed through the mesh and has a particle diameter of 2mm as raw material coal to the crusher for continuous crushing; and crushing the sludge by using a slurry crusher, mixing the pulverized coal with the target particle size with the sludge slurry, continuously feeding the mixture into a slurry mixer, mixing the mixture by using the slurry mixer, and discharging the mixture from a discharge hole of the slurry mixer to a sludge water coal slurry collecting container.

The slurry grinder comprises a grinding part, the slurry mixer comprises a mixing part, the grinding part of the slurry grinder and the mixing part of the slurry mixer comprise a cylinder body and a rotor positioned in the cylinder body, one end of the cylinder body is a material inlet, and a rotating shaft) is connected with the rotor and extends out of the other end of the cylinder body to serve as a power transmission end; the part of the area of the barrel wall is a screen area for discharging mixed materials, the screen area is full of meshes with apertures suitable for discharging mixed materials, a plurality of raised fixed teeth are arranged on the inner wall of the barrel except the screen area, the raised fixed teeth are arranged in a plurality of rows at intervals along the circumference of the inner wall of the barrel, each row comprises a plurality of raised fixed teeth vertically arranged along the inner wall of the barrel, and a vacant section is arranged between every two adjacent 2 rows of raised fixed teeth to serve as a space required by the materials to fall down; the periphery of the rotor is provided with a plurality of protruding rotating teeth, at least 2 rows of protruding rotating teeth are arranged along the periphery of the rotor, each row comprises a plurality of protruding rotating teeth arranged along the periphery Zhou Shuxiang of the rotor, and a vacant groove is arranged between every two adjacent 2 rows of protruding rotating teeth and is used as a space required for material falling; the rotor is characterized in that a plurality of protruding rotating teeth on the periphery of the rotor are meshed with a plurality of protruding fixed teeth arranged on the inner wall of the cylinder, grooves for embedding each other are formed between every 2 protruding fixed teeth or every 2 protruding rotating teeth, and the space required by the size of the material target particles is reserved between the protruding rotating teeth and the protruding fixed teeth which are meshed with each other.

The rotor of the mixing component of the mixer is formed by superposing a plurality of rotating plates, each rotating plate is provided with a shaft hole and comprises at least 2 blades, a part between every two adjacent blades is cut off to form a notch, and the outer side of each blade is provided with the convex rotating teeth; the rotating plates are sequentially deflected around the shaft by 1 deflection angle (R) from top to bottom relative to the upper 1 rotating plate, so that each rotating plate forms a deflection step surface in each empty groove relative to the adjacent rotating plate, and a required space is formed in the empty groove, such as the falling of materials of spiral stairs.

The notch of the rotating piece is arc-shaped, the arc radiuses of the notches of the plurality of superimposed rotating pieces are sequentially reduced from top to bottom, the openings of the rotating pieces are sequentially reduced, the width of the corresponding blade is sequentially widened, and the length of the protruding rotating teeth on the outer side of the blade is sequentially increased.

When the sludge is in a fluid state with the water content of 85-95%, the weight ratio of the granular crushed coal to the sludge is 1:0.46-0.70; when the sludge is plastic sludge with the water content of 75-85%, the weight ratio of the granular crushed coal to the sludge is 1:0.550-0.875.

In the crushing part of the slurry crusher or the mixing part of the slurry mixer, the meshing intervals between all the mutually meshed convex rotating teeth and the convex fixed teeth are consistent, and the intervals are all required by the size of the target particles of the materials.

The technical scheme adopted by the sludge water-coal slurry pulping system for solving the technical problems is as follows:

the sludge water-coal slurry pulping system can treat the residual sludge after sewage treatment with low cost and high efficiency, and is characterized by comprising a slurry mixer for mixing coal dust with target particle size with sludge slurry, wherein the front of the slurry mixer is divided into a coal treatment device and a sludge treatment device which are respectively arranged in a 2-way; the coal treatment device sequentially comprises a crusher and a vibrating screen for crushing raw coal according to the treatment process sequence, wherein a return device for returning the raw coal which fails to pass through the screen holes to the crusher is arranged between the crusher and the vibrating screen; the sludge treatment device mainly comprises a slurry pulverizer for pulverizing sludge into sludge.

The following is a further scheme of the sludge water-coal slurry pulping system:

a slurry pulverizer and slurry mixer as described above were employed.

A slurry mixer as described above was used.

The discharge port of the mixer is connected with a coal water slurry collecting container, the coal water slurry container is connected with a coal water slurry pool through a conveying pipe, and the coal water slurry pool is connected with a feed inlet of the vertical fluidized bed boiler through a conveying pump and a conveying pipe.

The preparation method and the pulping system of the sludge water-coal-slurry can treat the residual sludge after the sewage which is difficult to treat properly at present in a low-cost and high-efficiency manner, and can completely, thoroughly, efficiently and harmlessly consume the residual sludge after the sewage treatment. In the preparation method of the sludge water coal slurry, the scheme of ZL201910423588.4 named as a vertical slurry grinder or a horizontal slurry grinder with the application number of 201910423269.3 applied by the applicant 2019-05-21 can be adopted for sludge grinding. The invention adopts the slurry grinder to cut and grind the sludge into the sludge slurry before mixing, and the high-speed shearing action of the convex rotating teeth and the convex fixed teeth of the grinding part of the slurry grinder can thoroughly destroy the net structure of the sludge flocculant, so that the water in the sludge is fully separated out.

Because the core of the slurry mixer is a rotor formed by a group of mixing rotating plates and the inner wall of the rotor is provided with a plurality of convex fixed teeth, the slurry mixer has the dual functions of crushing and mixing, and can obtain unexpected good technical effects in the technical field of sludge water coal slurry preparation in the energy-saving and environment-friendly field which is urgently needed and is difficult to solve in the current society. Because the rotating plate of the slurry mixer is arranged in a left-right spiral way, the material is rotated by the changed spiral angle, and the mixing effect is improved; the depth of the spiral groove is gradually reduced from top to bottom, so that the materials transversely move, and meanwhile, the gradual reduction of the space of the spiral groove increases the extrusion mixing effect, so that coal and sludge can be fully mixed.

Aiming at the problems of ZL201910842220.1, the invention respectively pulverizes and refines coal blocks and sludge according to actual requirements, and repeatedly pulverizes raw coal into coal dust with the particle diameter smaller than 2mm by using the existing crusher; crushing the sludge by a slurry crusher, and crushing the sludge into sludge slurry with the particle diameter of less than 1 mm; and then mixing pulverized coal with the target particle size with the sludge slurry, continuously feeding the mixture into a slurry mixer, and mixing the mixture by the slurry mixer. The crushing of the granular crushed coal by a slurry mixer is thoroughly avoided. Since the surplus sludge after sewage treatment by a sewage treatment plant is generally free from other impurities, the pulverizing parts thereof are not generally damaged. Because the size of the gap between the protruding rotating teeth and the protruding fixed teeth of the smashing part of the slurry smashing machine determines the size of the smashed material particles, the sludge is smashed independently, and the gap between the protruding rotating teeth and the protruding fixed teeth can fully meet the actual requirement of the sludge by less than 1mm, so that the water in the sludge can be fully separated out.

In addition, the sludge water-coal-slurry pulping system has the advantages of small volume, small occupied area, convenience in realizing stokehold pulping, transportation and storage cost saving, reduction of the influence of the system on the surrounding environment, integration, miniaturization, localization and the like, so that the slurry mixer has good social benefit and economic benefit when applied to the field of sludge water-coal-slurry, and is worthy of popularization and application.

Drawings

FIG. 1 is an overall schematic diagram of a slurry mixer assembly according to the present invention.

Fig. 2 is a schematic perspective view showing the hidden state of each outer sleeve of the slurry mixer.

FIG. 3 is a schematic diagram of a motor of the slurry mixer assembly of the present invention.

FIG. 4 is a schematic cross-sectional view of a slurry mixer according to the present invention.

Fig. 5 is a schematic top view of a hybrid component of the present invention.

Fig. 6 is a schematic bottom view of a mixing element according to the invention.

Fig. 7 is a schematic perspective view of the cylinder.

Fig. 8 is a schematic view of a screen sheet.

FIG. 9 is a schematic view of a half circumference portion of a cylinder with raised teeth on the entire inner wall.

Fig. 10 is a schematic view of the outer circumference of a half-circumference portion of a cylinder in which a screen zone is provided.

FIG. 11 is a schematic view of the inner circumference of a half-circumference portion of a cylinder in which a screen zone is provided.

Fig. 12 is a bottom view of the hidden flange and chassis of the hybrid component.

Fig. 13 is a schematic view showing an assembled state of the rotor, the rotating shaft and the tray.

Fig. 14 is a schematic view of a horizontal rotation shaft.

Fig. 15 is a schematic view of a 3-vane rotor and its respective rotor plates in a separated state.

Fig. 16 is a schematic view of 1 rotor plate of a 3-vane rotor.

Fig. 17 is a 2-blade rotor schematic.

Fig. 18 is a schematic view of 1 rotor blade of a 2-blade rotor.

Fig. 19 is a 4-blade rotor schematic.

Fig. 20 is a schematic view of 1 rotor plate of a 4-blade rotor.

FIG. 21 is a process diagram of a method for preparing a slurry of sludge in accordance with the present invention.

FIG. 22 is a schematic diagram of a slurry system for producing slurry of sludge water-coal slurry according to the present invention.

FIG. 23 is a schematic diagram of an application of the slurry system for producing sludge water-coal slurry of the present invention.

List of reference numerals

1. A cylinder; 2. a rotor; 3. a rotating piece; 4. a rotating shaft; 5. a screen region; 6. a mesh; 7. protruding fixed teeth; 8. a vacant section; 9. protruding rotating teeth; 10. a notch; 11. a blade; 12. a notch; 13. a shaft hole; 14. a protruding rib; 15. a chassis; 16. a step surface; 17. a multi-tooth key; 18. a flange plate; 19. a plurality of tooth sockets; 20. a tray; 22. a groove; 23. a void groove; 24. an outer sleeve; 25. an inlet end; 26. a discharge port; 27. a bearing; 29. a mounting frame; 30. a mounting plate; 31. an outer sleeve; 32. a lower outer sleeve; 33. a belt pulley; 34. a motor; 35. a main shaft.

Detailed Description

In the following, embodiments of the present invention will be described by taking the slurry mixer shown in fig. 1 to 20 as an example, and combining the pulping process block diagram shown in fig. 21 with the schematic diagrams of the slurry making system of the sludge water-coal slurry shown in fig. 22 to 23.

The sludge can be crushed by ZL201910423588.4 of applicant 2019-05-21 named as a vertical slurry crusher or a horizontal slurry crusher scheme with the application number of 201910423269.3.

As shown in fig. 1, the slurry mixer of the present invention is provided with a mounting frame 29, a mounting plate 30 is provided on the mounting frame 29, the slurry mixer is fixedly mounted on one side of the mounting plate 30, the lower end of a rotating shaft 4 of the slurry mixer passes through the mounting plate 30, and a belt pulley 33 is mounted on the lower end of the rotating shaft 4. The other side of the mounting plate 30 is fixedly provided with a motor 34, a main shaft 35 of the motor 34 penetrates through the mounting plate 30, as shown in fig. 3, the lower end of the main shaft 35 of the motor 34 is also provided with a belt pulley 33, and a transmission belt is arranged between the belt pulley 33 and the belt pulley 33. The slurry mixer assembly of the present invention is formed.

As shown in fig. 2 and 4, the slurry mixer of the present invention includes a mixing member driven by a rotating shaft 4. As shown in fig. 5 and 6, the mixing component comprises a cylinder 1 and a rotor 2 positioned in the cylinder 1, a flange 18 is arranged at the upper end of the cylinder 1, and is a material inlet end 25, and a rotating shaft 4 is connected with the rotor 2 and extends out from the other end of the cylinder 1 to serve as a power transmission end.

As shown in fig. 5 and 6, a part of the wall area of the cylinder 1 is a screen area 5 for discharging mixed materials, the screen area 5 is covered with a mesh 6 with a pore diameter suitable for discharging the mixed materials, and a plurality of convex fixed teeth 7 are arranged on the inner wall of the cylinder 1 except the screen area 5. As shown in fig. 5 and 7, the protruding teeth 7 are arranged in a plurality of rows along the circumference of the inner wall of the cylinder 1 at intervals, each row comprises a plurality of protruding teeth 7 vertically arranged along the inner wall of the cylinder 1, and a gap section 8 is arranged between every two adjacent 2 rows of protruding teeth 7 to serve as a space required for material falling. The mixing component of the invention throws materials to the peripheral area by utilizing the centrifugal force of the rotation of the rotor 2 when the mixer works, and the materials which are sheared and mixed to meet the target particle size are thrown to a material collecting device from a plurality of meshes 6 of the screen plate by the centrifugal force; the material which does not meet the target particle size falls freely under the action of the gravity of the material, and the lower protruding rotating teeth 9 and the protruding fixed teeth 7 continue to be sheared and mixed. The material is sheared and mixed to the target particle size throughout the fall and is thrown out of the plurality of openings 6 of the screen sheet to the material collection means under centrifugal force.

As shown in fig. 5 and 7, a plurality of protruding teeth 9 are provided on the outer periphery of the rotor 2, and at least 2 rows of protruding teeth 9 are provided along the outer periphery of the rotor 2, and 3 rows or 4 rows are preferably provided, and particularly 3 rows are most preferably provided, from the viewpoint of practical effects and manufacturability. Each row comprises a plurality of protruding rotating teeth 9 arranged along the outer side Zhou Shuxiang of the rotor 2, and empty slots 23 are arranged between the adjacent 2 rows of protruding rotating teeth 9 to serve as spaces required for material falling. The convex rotating teeth 9 on the periphery of the rotor 2 are meshed with the convex fixed teeth 7 arranged on the inner wall of the cylinder body 1, grooves for embedding each other are formed between every 2 convex fixed teeth 7 or every 2 convex rotating teeth 9, and the needed spacing of the material target particle size is reserved between the meshed convex rotating teeth 9 and the convex fixed teeth 7.

As shown in fig. 4 and 13, the rotor 2 is formed by stacking a plurality of rotor plates 3. As shown in fig. 16, each rotor 3 is provided with a shaft hole 13, which comprises at least 2 blades 11, a part between every two adjacent blades 11 is cut to form a notch 12, and protruding rotor teeth 9 are arranged on the outer side of each blade 11. As shown in fig. 15, each rotary plate 3 is sequentially pivoted by 1 deflection angle R from top to bottom relative to the upper 1 rotary plate 3, so that each rotary plate 3 forms a deflection step surface 16 at each empty groove 23 relative to the adjacent rotary plate 3, and a space required for falling materials shaped like spiral stairs is formed at the empty grooves 23.

As shown in fig. 15, the notches 12 of the rotating plates 3 are arc-shaped, the arc radii of the notches 12 of the plurality of superimposed rotating plates 3 are sequentially reduced from top to bottom, so that the openings of the rotating plates are sequentially reduced, the widths of the blades 11 are correspondingly sequentially widened, and the lengths of the protruding rotating teeth 9 on the outer sides of the blades 11 are sequentially increased.

The blades 11 of the rotor 3 are 2 symmetrically distributed, as shown in fig. 17 and 18; or 3 sheets uniformly distributed as shown in fig. 15 and 16; or 4 uniformly distributed sheets as shown in fig. 19 and 20. At least 1 rotor plate 3 below the rotor 2 is deflected in the opposite direction. From the viewpoint of practical effects and manufacturability, it is preferable to provide 3 or 4 sheets, and particularly, it is preferable to provide 3 sheets.

As shown in fig. 14, the rotating shaft 4 and the rotor 2 are connected by adopting a spline, the rotating shaft 4 is provided with a plurality of tooth keys 17, and the tooth keys 17 are uniformly distributed along the circumference of the outer surface of the rotating shaft 4. As shown in fig. 15 and 16, the center of each rotary plate 3 is provided with a corresponding multi-tooth groove 19, and the included angle between every two adjacent 2 tooth keys is the deflection angle R between the upper and lower 2 rotary plates 3. In this way, the installation and debugging are convenient, and the deflection angle R can be realized by only staggering 1 tooth key from top to bottom.

As shown in fig. 15, preferably, the rotor 2 is formed by superposing 9 rotor plates 3, the blades 11 of the rotor plates 3 are uniformly distributed in 3 pieces, the deflection angle R is 12 degrees, and the number of teeth of the multi-tooth key 17 and the number of grooves of the multi-tooth grooves 19 of each rotor plate 3 are 30; the 9 th rotary piece 3 at the lowermost of the 9 superimposed rotary pieces 3 is deflected by 12 degrees in the opposite direction.

The cross sections of the convex fixed teeth 7 and the convex rotating teeth 9 are triangular, trapezoidal or rectangular, and triangular is preferable. The cross section of the groove 22 for the corresponding counterpart to be embedded between every 2 convex fixed teeth 7 or every 2 convex rotating teeth 9 is also in a corresponding triangle or trapezoid or rectangle. The meshing intervals between all the mutually meshed convex rotating teeth 9 and the convex fixed teeth 7 are consistent, and the intervals are required by the size of the target particles of the material. The invention is preferably triangular in cross-section.

As shown in fig. 7, the cylinder 1 includes half 2 half-circumference portions; wherein the inner walls of 1 half-circumference portion are all provided with protruding teeth 7 as shown in fig. 9; the other 1 half-circumference is provided with a screen zone 5. As shown in fig. 10 and 11, another 1 half circumference portion is provided with a notch 10, and the cylinder 1 further includes an independent screen sheet, as shown in fig. 8, which is fixedly installed in the notch 10 as the screen zone 5. The mesh 6 has a small inside pore diameter and a large outside pore diameter. The arrangement can effectively prevent the material from blocking the mesh 6, and keep the mesh 6 smooth in discharging.

As shown in fig. 4, 12 and 13, a tray 20 is arranged below the rotor 2, and the tray 20 rotates along with the rotor 2; a chassis 15 is arranged below the tray 20, and a plurality of raised ribs 14 for stirring materials falling onto the chassis 15 are arranged on the bottom surface of the tray 20; the raised ribs 14 are arranged along the radial direction and uniformly distributed along the circumference; the shaft 4 passes through the tray 20 and the chassis 15 and protrudes downwards through at least one bearing 27. As shown in fig. 1, an outer sleeve 24 is sleeved outside the cylinder 1, the upper outer sleeve 24 is provided with a discharge hole 26, and the discharge hole 26 corresponds to the screen area 5 of the cylinder 1. The raised ribs 14 are used for cleaning the materials falling onto the chassis 15, throwing the materials to the peripheral area by utilizing the centrifugal force of the rotation of the rotor 2, and throwing the materials which are sheared and mixed to meet the target particle size out of the meshes 6 of the screen mesh to a material collecting device by utilizing the centrifugal force; the material not meeting the target particle size continues to be sheared and mixed by the raised rotor teeth 9 and raised stator teeth 7 near the lower end of the chassis 15 and is thrown out of the plurality of mesh openings 6 of the screen sheet to the material collection means under centrifugal force.

As shown in fig. 1, the rotating shaft 4 is sleeved with a middle outer sleeve 31 and a lower outer sleeve 32 below the upper outer sleeve 24, the middle outer sleeve 31 and the lower outer sleeve 32 are connected with each other, the lower outer sleeve 32 is fixedly arranged on one side of the mounting plate 30, the lower end of the rotating shaft 4 passes through the mounting plate 30, and a belt pulley 33 is arranged at the lower end of the rotating shaft 4; the motor 34 is fixedly arranged on the other side of the mounting plate 30, a main shaft 35 of the motor 34 penetrates through the mounting plate 30, and a belt pulley 33 is also arranged at the lower end of the main shaft 35 of the motor 34.

When the rotary shaft 4 is used, the motor 34 drives the rotary shaft 4 to rotate at a high speed, the rotor 2 rotates in the cylinder 1 at a high speed, materials are continuously fed from the material inlet end 25 and sheared and mixed by the convex rotary teeth 9 of the rotor 2 and the convex fixed teeth 7 on the inner wall of the cylinder 1, and the materials which are not sheared into target granularity fall to the lower surface through the falling space and are sheared and mixed continuously. The material is sheared and mixed to the desired particle size throughout the fall and is thrown out of the plurality of openings 6 of the screen sheet by centrifugal force through the discharge port 26 to the material collection means.

As shown in fig. 21, in the preparation method of sludge water coal slurry, the weight ratio of the granular crushed coal to the sludge is calculated according to the water content of the sludge and the water content of the target sludge water coal slurry; raw coal and sludge are crushed into pulverized coal and sludge slurry with target particle size, and the pulverized coal and sludge slurry with target particle size are mixed to prepare sludge coal slurry consisting of 65-70% of solid particles and 30-35% of water. The sludge mainly refers to surplus sludge after sewage treatment in a sewage treatment plant, has great viscosity, has a fine structure of a flocculation reticular structure, contains a large amount of internal water, and is difficult to be fully mixed with coal slurry directly; the residual sludge after sewage treatment by a sewage treatment plant is generally free from other impurities and cannot damage crushing parts of the residual sludge. However, the sludge can be other similar waste materials, and the waste materials generally pollute the environment, but have certain combustion heat value, such as oil sludge, waste oil slurry, organic waste slurry, kitchen waste slurry and the like; of course, the hard impurities such as metal and stone contained therein, which may damage the pulverizing member, need to be removed in advance. The raw coal is, of course, preferably pure coal or crushed coal, but may be a slurry of coal having a sufficient combustion heat value, gangue which can be crushed into powder, or the like.

Before mixing pulverized coal with slurry, raw coal is crushed into pulverized coal with a particle diameter of 1mm to 2mm, sludge is crushed into slurry with a particle diameter of 1mm or less, and pulverized coal with a target particle size is mixed with the slurry. Repeatedly crushing raw material coal by using a crusher, screening the raw material coal crushed by the crusher each time by using a vibrating screen with a mesh diameter of 2mm, and returning the raw material coal which is not passed through the mesh and has a particle diameter of 2mm as qualified coal dust which is not passed through the mesh and has a particle diameter of 2mm as raw material coal to the crusher for continuous crushing; the method comprises the steps of crushing sludge by a slurry crusher, mixing pulverized coal with target particle size and sludge slurry, continuously feeding the pulverized coal and the sludge slurry into a slurry mixer, mixing the pulverized coal and the sludge slurry by the slurry mixer, and discharging the pulverized coal and the sludge slurry from a discharge port of the slurry mixer to a sludge water slurry collecting container.

In the crushing part of the slurry crusher or the mixing part of the slurry mixer, the meshing intervals between all the mutually meshed convex rotating teeth 9 and the convex fixed teeth 7 are consistent, and the intervals are all required by the size of the target particles of the materials.

When the sludge is in a fluid state with a water content of 85-95%, the weight ratio of the granular crushed coal to the sludge is 1:0.46-0.70. If the water content of the sludge is 85%, the weight ratio of the granular crushed coal to the sludge is 1:0.55-0.70. The sludge water slurry composed of 65 to 70% of solid particles and 30 to 35% of water can be produced. If the sludge is in a fluid state with the water content of 90%, the weight ratio of the granular crushed coal to the sludge is 1:0.50-0.64. The sludge water slurry composed of 65 to 70% of solid particles and 30 to 35% of water can be produced. If the sludge is in a fluid state with the water content of 95%, the weight ratio of the granular crushed coal to the sludge is 1:0.460-0.585. The sludge water slurry composed of 65 to 70% of solid particles and 30 to 35% of water can be produced.

When the sludge is plastic sludge with the water content of 75-85%, the weight ratio of the granular crushed coal to the sludge is 1:0.550-0.875. If the water content of the sludge is 75%, the weight ratio of the granular crushed coal to the sludge is 1:0.670-0.875; if the water content of the sludge is 80%, the weight ratio of the granular crushed coal to the sludge is 1:0.60-0.78; if the water content of the sludge is 85%, the weight ratio of the granular crushed coal to the sludge is 1:0.55-0.70. The sludge water slurry composed of 65 to 70% of solid particles and 30 to 35% of water can be produced.

As shown in fig. 22, a sludge slurry preparation system for implementing the above-mentioned sludge slurry preparation method can treat residual sludge after sewage treatment with low cost and high efficiency, and comprises a slurry mixer for mixing pulverized coal with a target particle size with sludge slurry, wherein a coal treatment device and a sludge treatment device 2 paths are respectively arranged in front of the slurry mixer; the coal treatment device sequentially comprises a crusher and a vibrating screen for crushing raw coal according to the treatment process sequence, wherein a return device for returning the raw coal which fails to pass through the screen holes to the crusher is arranged between the crusher and the vibrating screen; the sludge treatment device mainly comprises a slurry pulverizer for pulverizing sludge into sludge. The slurry pulverizer can adopt the scheme of ZL201910423588.4 of applicant 2019-05-21 named as a vertical slurry pulverizer or a horizontal slurry pulverizer with the application number of 201910423269.3. The slurry mixer is as described above. As shown in FIG. 23, the discharge port 26 of the mixer is connected with a water-coal-slurry collecting container, the water-coal-slurry container is connected with a water-coal-slurry pool through a conveying pipe, and the slurry water-coal-slurry preparing system can conveniently realize stokehold pulping, and only the water-coal-slurry pool is connected with a feed port of a vertical fluidized bed boiler through a conveying pump and the conveying pipe. The delivery pump may employ the applicant's application number: 201910075221.8 application date: 2019-01 is named as a rotor pump for conveying solid-liquid two phases.

It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents. The description of the invention encompasses multiple inventive concepts, such as "preferably," "according to a preferred embodiment," or "optionally," all means that the corresponding paragraph discloses a separate concept, and that the applicant reserves the right to filed a divisional application according to each inventive concept. Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

Claims

1. The mixing component is characterized by comprising a barrel (1) and a rotor (2) positioned in the barrel (1), wherein one end of the barrel (1) is a material inlet, and a rotating shaft (4) is connected with the rotor (2) and extends out of the other end of the barrel (1) to serve as a power transmission end.

2. The mixing component according to claim 1, wherein a part of the area of the cylinder wall of the cylinder (1) is a screen area (5) for discharging mixed materials, the screen area (5) is full of meshes (6) with apertures suitable for discharging mixed materials, a plurality of protruding fixed teeth (7) are arranged on the inner wall of the cylinder (1) except for the screen area (5), the protruding fixed teeth (7) are arranged in a plurality of rows at intervals along the circumference of the inner wall of the cylinder (1), each row comprises a plurality of protruding fixed teeth (7) vertically arranged along the inner wall of the cylinder (1), and a gap section (8) is arranged between every two adjacent 2 rows of protruding fixed teeth (7) as a space required for material falling.

3. A mixing element according to claim 1 or 2, characterized in that the rotor (2) is provided with a number of protruding teeth (9) at the periphery, the protruding teeth (9) being arranged in at least 2 rows along the periphery of the rotor (2), each row comprising a number of protruding teeth (9) arranged along the periphery Zhou Shuxiang of the rotor (2), and that between adjacent 2 rows of protruding teeth (9) there are provided empty slots (23) as space for the material to fall.

4. A mixing element according to any one of claims 1-3, characterized in that a number of protruding turning teeth (9) on the outer periphery of the rotor (2) are intermeshed with a number of protruding turning teeth (7) arranged on the inner wall of the cylinder (1), that every 2 protruding turning teeth (7) or every 2 protruding turning teeth (9) form a recess for the mutual embedding of each other, and that the space between the intermeshed protruding turning teeth (9) and protruding turning teeth (7) is reserved for the desired size of the material particles.

5. The mixing component according to any one of claims 1 to 4, wherein the rotor (2) of the slurry mixer mixing component is formed by superposing a plurality of rotary plates (3), each rotary plate (3) is provided with a shaft hole (13) and comprises at least 2 blades (11), a part between every two adjacent blades (11) is cut off to form a notch (12), and the outer side of each blade (11) is provided with the convex rotary teeth (9); the rotating plates (3) are sequentially deflected around the shaft by 1 deflection angle R from top to bottom relative to the upper 1 rotating plate (3), so that each rotating plate (3) forms a deflection step surface (16) in each empty groove (23) relative to the adjacent rotating plate (3), and a space required by material falling like spiral stairs is formed in the empty grooves (23).

6. A mixing element according to any one of claims 1-5, wherein the recesses (12) of the rotor (3) are circular arc-shaped, the circular arc radii of the recesses (12) of the plurality of superimposed rotor (3) decrease in sequence from top to bottom, so that the openings thereof decrease in sequence, and correspondingly, the widths of the blades (11) increase in sequence, and the lengths of the protruding rotor teeth (9) outside the blades (11) increase in sequence.

7. The mixing element according to any one of claims 1 to 6, wherein the discharge opening (26) of the slurry mixer is connected to a water-coal-slurry collecting container, the water-coal-slurry container is connected to a water-coal-slurry tank via a conveying pipe, and the water-coal-slurry tank is connected to a feed opening of a vertical fluidized bed boiler via a conveying pump and a conveying pipe.

8. A sludge water coal slurry preparation system, which is characterized by comprising the mixing component and a slurry mixer for mixing coal dust and sludge slurry, wherein the slurry mixer is divided into a coal treatment device and a sludge treatment device which are respectively arranged in a 2-way; the coal treatment device sequentially comprises a crusher and a vibrating screen for crushing raw coal according to the treatment process sequence, wherein a return device for returning the raw coal which fails to pass through the screen holes to the crusher is arranged between the crusher and the vibrating screen; the sludge treatment apparatus includes a slurry pulverizer for pulverizing sludge into sludge, the slurry pulverizer including a pulverizing member, and the slurry mixer including a mixing member.

9. A method for preparing sludge water coal slurry by using the sludge water coal slurry preparation system according to claim 8, wherein the method is used for preparing the sludge water coal slurry from the residual sludge after the sewage with the fine structure of flocculation net structure is treated, and is characterized in that the weight ratio of the granular crushed coal to the sludge is calculated according to the water content of the sludge and the water content of the target sludge water coal slurry; before mixing pulverized coal and sludge slurry, respectively, crushing raw coal into pulverized coal with a particle diameter of 1-2 mm, crushing the sludge into sludge slurry with a particle diameter of less than 1mm by a slurry crusher, mixing the pulverized coal and the sludge slurry together, continuously feeding the mixture into a slurry mixer, mixing the mixture by the slurry mixer, and discharging the mixture from a discharge port of the slurry mixer to a sludge slurry collecting container, thereby preparing sludge slurry composed of 65-70% of solid particles and 30-35% of water.

10. The method according to claim 9, wherein the raw coal is repeatedly crushed by a crusher, and each time the raw coal crushed by the crusher is screened by a vibrating screen with a mesh diameter of 2mm, the raw coal passing through the mesh with a particle diameter smaller than 2mm as qualified coal dust, and the raw coal which cannot pass through the mesh with a particle diameter larger than 2mm still returns to the crusher to continue crushing.