CN214265990U

CN214265990U - Multistage granulation equipment of ceramic pug

Info

Publication number: CN214265990U
Application number: CN202023280861.XU
Authority: CN
Inventors: 李金华; 林庆生
Original assignee: Foshan Lanzhijing Technology Co ltd
Current assignee: Foshan Lanzhijing Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-09-24
Anticipated expiration: 2030-12-30

Abstract

The utility model relates to the technical field of ceramic powder processing equipment, in particular to a ceramic mud material multistage granulation device; the granulation device comprises a granulation bin, wherein at least 2 friction granulation layers are arranged in the granulation bin, and each friction granulation layer is provided with at least 1 friction granulation component; the aperture of the sieve pore of the friction granulation component positioned on the lower layer is smaller than that of the corresponding sieve pore of the friction granulation component positioned on the upper layer; the utility model has the advantages that the powder particles prepared by the friction granulation components of different friction granulation layers are gradually reduced by arranging the plurality of friction granulation layers, so that the problem of low granulation efficiency of the existing single-layer granulation equipment is solved; in addition, dry air or hot air is introduced into the granulating bin through the air inlet, the flowability and/or the temperature of the air flow in the granulating bin are improved, powder particles are dried, and the specific surface area of the granulated particles is large, so that the drying speed is high, the drying cost is low, the surface viscosity of the dried powder particles is reduced, and the powder particles are easy to fall off from sieve pores.

Description

Multistage granulation equipment of ceramic pug

Technical Field

The utility model relates to a ceramic powder processing equipment technical field, especially a multistage granulation equipment of pottery pug.

Background

For solving and utilizing the spray drying tower to carry out the drying to ceramic slurry, the energy consumption that brings is big, the pollution is serious, the high problem of manufacturing cost, application number is 2019102196264's chinese utility model patent application, a pottery wet process low temperature powder process is disclosed, this technology is through passing through dehydration treatment to slurry in proper order, low temperature drying handles and breakage, granulation treatment, the dry powder granule that obtains possesses the characteristics of low water content, this technology need not to consume too much combustion energy when keeping ceramic powder process efficiency, reduce ceramic production process's energy consumption by a wide margin, and the productivity effect is improved, reduce the pollutant effectively and reduce the manufacturing cost of enterprise by a wide margin.

The process comprises the steps of firstly, preparing ceramic slurry into a square filter cake with the side length of about 2m and the thickness of about 4cm through a filter press, then, preliminarily dividing the filter cake into small mud blocks with the side length of 5 cm-20 cm, then, cutting the small mud blocks into small mud materials with the grain diameter of less than 5cm, then, drying the small mud materials by using the waste heat of a kiln, and finally, crushing and granulating the dried small mud materials to form powder particles with the grain diameter meeting the requirements, thereby solving the problem of high energy consumption caused by the adoption of a spray drying tower in the traditional process.

Broken, the granulation is carried out small pug and is adopted the broken granulation equipment of pottery pug to handle, and application number 2019203757134's chinese utility model patent discloses a broken granulation equipment of pottery pug, and its principle is:

the dried mud falls into a crushing bin of the equipment from a feed inlet above the equipment; the dried mud is broken into large particles falling into the circular arc-shaped screen mesh by the breaking hammers rotating at high speed in the breaking bin, the large particles are driven to circularly shed above the circular arc-shaped screen mesh by the continuous circumferential rotation of the plurality of breaking hammers and the large particles sinking on the circular arc-shaped screen mesh, and the large particles are gradually broken into small particles with small particle sizes by collision; in addition, when the breaking hammer rotates to the position above the circular arc-shaped screen, small particles with small particle sizes on the circular arc-shaped screen are extruded into a friction gap between the breaking hammer and the circular arc-shaped screen by the rotating extrusion of the breaking hammer, the small particles extruded into the friction gap rub through holes in the circular arc-shaped screen, so that the small particles are rubbed to form powder particles with ultra-small particle sizes, and finally the powder particles meeting the particle size requirements penetrate through the through holes in the circular arc-shaped screen through the crushing and friction granulation, fall onto a discharge belt and are transported out.

The existing ceramic pug crushing and granulating equipment can crush pugs into powder particles with the particle size meeting the requirement. However, it has the following problems:

1. when the existing equipment carries out granulation, the block diameter of the pug on the screen is from tiny powder particles to about 5cm of pug blocks, and the size of the pug blocks is greatly different from the aperture of the screen hole of the screen, so the pug blocks need to be lifted for many times and can be crushed into the size suitable for friction granulation by a crushing hammer, and the efficiency of the whole friction granulation is reduced;

2. the ceramic pug to be treated has higher requirement on the dryness and is only suitable for the ceramic pug with the water content not more than 10 percent. When the water content of the ceramic pug is high, the through holes are easily stuck by the ceramic pug with high water content because the aperture of the sieve pores on the circular arc-shaped sieve is only 0.5-1 mm, so that the speed of equipment friction granulation is reduced, and even the friction granulation cannot be continuously carried out;

with the improvement of the low-temperature powder making process by the ceramic wet method, a new granulation device needs to be developed to meet the requirement of high water content of the pug to be granulated and further improve the granulation efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multistage granulation equipment of pottery pug makes it can rub the granulation to the higher pug of water content, finally obtains the ceramic powder that the water content meets the requirements.

In order to achieve the above function, the utility model provides a technical scheme is:

a multistage granulating device for ceramic pug comprises a granulating bin, wherein at least 2 friction granulating layers are arranged in the granulating bin, and each friction granulating layer is provided with at least 1 friction granulating assembly;

the friction granulation assembly comprises a rotating shaft, a plurality of scrapers and an arc-shaped screen, and the scrapers are uniformly fixed on the rotating shaft; the circular arc-shaped screen mesh is coaxial with the rotating shaft and is fixedly arranged right below the rotating shaft, and a plurality of screen holes are formed in the circular arc-shaped screen mesh; a friction gap is formed between the scraper and the circular arc-shaped screen;

the aperture of the sieve pore of the friction granulation assembly positioned on the lower layer is smaller than that of the corresponding sieve pore of the friction granulation assembly positioned on the upper layer.

Preferably, more than 1 air outlet is seted up to the granulation storehouse, the air outlet is connected with the air exhauster through the pipeline.

Preferably, more than 1 air inlet and air outlet are seted up to the granulation storehouse, air outlet and air inlet are connected with air exhauster and air-blower through the pipeline respectively.

Preferably, the number of friction granulation assemblies in adjacent friction granulation layers is different.

Preferably, hot air flow or dry air is introduced into the air inlet, and the temperature of the hot air flow is 40-100 ℃.

Preferably, the hot air flow is hot flue gas exhausted from the kiln.

Preferably, the drying air is fluidized natural air treated by an air dryer.

Preferably, the two side edges of the circular arc-shaped screen are provided with guide posts, the front side plate and the rear side plate of the granulation cabin are provided with guide grooves matched with the guide posts, and the left side plate is provided with a replacement opening allowing the circular arc-shaped screen to enter and exit.

Preferably, 5 friction granulation layers are arranged in the granulation bin, the aperture of each sieve pore on the friction granulation component on each 5 friction granulation layers from top to bottom is 3.5-3 mm, 2.8-2.5 mm, 2.3-2 mm, 1.8-1.5 mm and 1.3-1 mm in sequence, and the friction gap on each friction granulation component is slightly larger than or equal to the aperture of each sieve pore.

Preferably, along the granulation chamber, from top to bottom, the number of friction granulation assemblies located on the odd-numbered friction granulation layers is 1 and the number of friction granulation assemblies located on the even-numbered friction granulation layers is 2.

The beneficial effects of the utility model reside in that:

1. by arranging the plurality of friction granulation layers, the sizes of powder particles prepared by the friction granulation components of different friction granulation layers are gradually reduced, multi-stage continuous granulation is realized, and the problem of low granulation efficiency of the existing single-layer granulation equipment is solved;

2. through the arrangement of the air inlet, dry air or hot air flow is introduced into the granulation bin, so that the flowability and/or the temperature of the air flow in the granulation bin are improved, the moisture of powder particles is favorably taken away, and the ceramic pug with higher water content is granulated and dried at the same time; and because the mud blocks are changed into fine powder particles after granulation, the specific surface area of the mud blocks is greatly increased, thereby being beneficial to the volatilization or evaporation of the moisture of the powder particles, improving the drying speed of the ceramic mud material and saving the drying cost;

3. through letting in the hot gas flow in the granulation storehouse, the mud material of adhesion on the sieve mesh because contact with hot gas flow or hot metal circular arc screen cloth, its surface moisture loses the volume and diminishes fast, and surface viscosity reduces, consequently extremely easily drops from the sieve mesh, has solved the problem that the sieve mesh was easily stuck with the mud material when current equipment was granulation.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of FIG. 1 with the left side plate omitted;

FIG. 3 is a schematic structural view of FIG. 1 with the drive unit and the front bezel omitted;

fig. 4 is a schematic diagram of a friction pelletizing assembly.

Detailed Description

The present invention will be further explained with reference to fig. 1 to 4 below:

the first embodiment is as follows:

the multistage ceramic pug granulating equipment shown in fig. 1 to 4 comprises a granulating bin 1, wherein the whole granulating bin 1 is cuboid and hollow, and comprises a left side plate 11, a right side plate 12, a front baffle plate 13 and a rear baffle plate 14. At least 2 friction granulation layers are arranged in the granulation bin 1, and each friction granulation layer is provided with at least 1 friction granulation assembly 2. In the present embodiment, the inside of the granulation chamber 1 is divided into a first friction granulation layer 100, a second friction granulation layer 101, a third friction granulation layer 102, a fourth friction granulation layer 103 and a fifth friction granulation layer 104 from top to bottom, wherein the number of friction granulation components 2 in the odd-numbered friction granulation layers, i.e. the first, third and fifth friction granulation layers, is 1, and the number of friction granulation components 2 in the even-numbered friction granulation layers, i.e. the second and fourth friction granulation layers, is 2. It should be noted that the number of the friction granulation layers in the granulation chamber 1 and the number of the friction granulation assemblies 2 contained in each friction granulation layer can be adjusted accordingly depending on the size of the apparatus.

In order to ensure that the particles processed by the previous friction granulation layer all fall into the next friction granulation layer, the front baffle 13 and the rear baffle 14 respectively comprise a plurality of material blocking plates in the embodiment, the material blocking plates are arranged on the front side and the rear side of each friction granulation layer, and the material blocking plates mainly play two roles of material blocking and material guiding.

As shown in fig. 4, the friction granulation assembly 2 includes a rotating shaft 21, a plurality of scrapers 22, and a circular arc-shaped screen 23. In the present embodiment, the rotating shaft 21 of the friction granulation assembly 2 is mounted on the left and

right side plates

11 and 12 of the granulation chamber 1 through bearings, so that the friction granulation assembly 2 is disposed in the granulation chamber 1. A round mounting plate 24 is fixedly arranged on the left side surface and the right side surface of the rotating shaft 21 close to the granulation cabin 1; a plurality of scrapers 22 are uniformly fixed on the rotating shaft 21 through a circular mounting plate 24; the circular arc-shaped screen 23 is coaxial with the rotating shaft 21 and is fixed right below the rotating shaft 21, and a plurality of screen holes (not shown in the figure) are uniformly formed in the circular arc-shaped screen 23; there is a gap, which we refer to as a friction gap 200 in this specification, between the extreme end of the scraper 22 and the upper surface of the circular arc-shaped screen 23. In order to enhance the effect of friction crushing of the sludge, as shown in fig. 4, a certain inclination angle is formed between the scraper 22 and the circular arc-shaped screen 23. The rotating shaft 21 shown in fig. 4 rotates counterclockwise, so that the scrapers 22 squeeze the pug on the circular arc-shaped screen 23 instead of shoveling the pug on the circular arc-shaped screen 23 during the friction granulation process, thereby achieving better effect of friction extrusion granulation. The turning shaft 21 is driven to rotate by a driving mechanism, and in the present embodiment, the turning shaft 21 is connected to a motor 25 fixedly mounted on the right side plate 12 and driven to rotate by the motor 25.

The circular arc-shaped screen 23 is a wearing part, in order to facilitate replacement of the circular arc-shaped screen 23, guide posts 231 are arranged on two side edges of the circular arc-shaped screen 23, guide grooves 1314 matched with the guide posts 231 are arranged on the front baffle 13 and the rear baffle 14, a replacement opening 111 allowing the circular arc-shaped screen 23 to enter and exit is formed in the left side plate 11, and the shape of the replacement opening 111 is the same as the longitudinal section of the circular arc-shaped screen 23. When replacing the circular arc-shaped screen 23, it is only necessary to pull out the old circular arc-shaped screen 23 from the replacement opening 111, put in the new circular arc-shaped screen 23 from the replacement opening 111, and push the guide post 231 on the circular arc-shaped screen 23 to the rightmost position in cooperation with the guide groove 1314.

In order to reduce the particle size of the powder particles layer by layer during the granulation process, the aperture of the sieve pores on the lower friction granulation assembly 2 is smaller than the corresponding sieve pores on the upper friction granulation assembly 2. Generally, the aperture of the sieve holes on the friction granulation assembly 2 with 5 friction granulation layers is 3.5-3 mm, 2.8-2.5 mm, 2.3-2 mm, 1.8-1.5 mm and 1.3-0.8 mm in sequence, the device has better effect in granulation. The apertures of the 5-layer mesh in this example were 3mm, 2.5mm, 2mm, 1.5mm and 1mm in this order. The friction gaps 200 on the friction granulation assemblies 2 in different layers are different, the size of the friction gap 200 is determined by actual production conditions, so that the friction gap 200 is in a proper size, generally, in order to ensure the friction granulation efficiency, the friction gap 200 is not too large, and only needs to be slightly larger than or equal to the aperture of the sieve hole.

When the device is used, mud enters the granulation cabin 1 from the feeding port 3 above the device and is impacted by the scraper 22 of the friction granulation component 2 positioned in the first friction granulation layer 100, dried mud is crushed to form large particles which fall onto the circular arc-shaped screen 23, when the scraper 22 rotates to the position above the circular arc-shaped screen 23, the particles on the circular arc-shaped screen 23 are extruded into the friction gap 200 between the scraper 22 and the circular arc-shaped screen 23 by the rotating extrusion of the scraper 22, so that the particles extruded into the friction gap 200 rub against the sieve pores on the circular arc-shaped screen 23, and the particles are rubbed to form ultra-small particle size particles and/or strip-shaped mud with smaller diameter and fall into the second friction granulation layer 101 from the sieve pores, and meanwhile, the large particles which are not subjected to friction granulation are scraped and circularly sprinkled by the scraper 22 again to continuously carry out friction granulation; the small particles entering the next friction granulation layer are processed into particles or strip-shaped pugs with smaller diameters by the friction granulation component 2 positioned on the layer, and the particles or strip-shaped pugs gradually go down, and finally powder particles with particle diameters meeting the requirements are obtained through multi-stage friction granulation and are discharged from a discharge port of the friction granulation equipment and then are sent to the next procedure.

Compared with the existing granulation equipment, the granulation equipment of the embodiment improves the granulation efficiency mainly in the following two aspects:

1. by arranging a plurality of friction granulation layers, a plurality of friction granulation assemblies 2 positioned in different friction granulation layers work simultaneously, and compared with the existing single-layer granulation equipment, the processing capacity in unit time is improved;

2. the size of the powder particles prepared by the friction granulation component 2 of different friction granulation layers becomes smaller layer by layer, namely the sieve pores of the circular arc-shaped sieve 23 in the first friction granulation layer 100 are far larger than the sieve pores of the traditional granulation equipment, so that the speed of the pug passing through the first-stage sieve pores is improved.

Example two:

the difference between this embodiment and the first embodiment is: more than 1 air outlet 112 is arranged on the granulation cabin 1, the air outlet 112 is arranged on the left side plate 11, and the air outlet 112 is connected with an exhaust fan through a pipeline. A negative pressure area is formed in the granulation cabin 1 by air draft of the exhaust fan.

When the water content of the ceramic pug to be treated is 8-10% (i.e. the water content of the ceramic powder particles finally used for making the green brick) and the water content of the single ceramic pug is relatively uniform. Since the ceramic pug is dry, fine powder with the mesh size of less than 120 meshes is formed in the process of friction granulation, and the fine powder is too fine to be used in the subsequent material distribution process, so that the fine powder needs to be removed.

In the process of friction granulation, the rotation of the scraper 22 disturbs the airflow in the granulation chamber 1, so as to raise some fine powder to float in the granulation chamber 1.

The fine powder in the granulation chamber 1 is discharged from the air outlet 112 due to the action of the negative pressure, thereby achieving the purpose of removing the fine powder.

The conduit connecting the exhaust port 112 may be connected to a dust collector for subsequent processing of the fine powder contained therein.

Example three:

the difference between this embodiment and the first embodiment is: the granulation cabin 1 is provided with more than 1 air inlet 121 and air outlet 112, and the air outlet 112 and the air inlet 121 are respectively connected with an exhaust fan and a blower through pipelines.

In the present embodiment, as shown in fig. 3, the number of the air outlets 112 and the air inlets 121 is 2, and the air outlets and the air inlets are respectively formed on the left side plate 11 and the right side plate 12. Wherein the air inlet 121 is respectively arranged below the circular arc-shaped screens 23 of the second and fifth friction granulation layers; the air outlet 112 is provided below the circular arc-shaped screens 23 of the first and fourth frictional granulation layers, respectively. The number of the air inlets 121 and the air outlets 112 can be increased or decreased as required, and the arrangement positions of the air inlets 121 and the air outlets are subject to the condition that the airflow can fully flow in the granulation chamber 1.

The air inlet 121 may be filled with hot air or dry air.

When the water content of the ceramic pug to be treated is 9% -11%, or the water content is 8% -10% but the overall dryness is uneven, namely, when a 'sandwich' state of outer dry and inner wet exists, in order to prevent the pug of the core part with larger water content from pasting the sieve pores during granulation, dry air can be introduced, partial water content is taken away by utilizing the rapid flow of the air, and the sieve pores are prevented from being blocked. In this embodiment, the drying air is fluidized natural air treated by an air dryer.

When the water content of the ceramic pug to be treated is 12-14%, hot air with the temperature of 40-100 ℃ is introduced into an air inlet in order to dry the ceramic pug. The hot air flow can utilize the treated hot flue gas discharged from the kiln so as to achieve the purpose of energy conservation.

Because the water content of the ceramic pug produced in each batch is basically kept consistent, when in friction granulation, the powder particles with the water content and the particle size meeting the requirements can be obtained by controlling the speed of the friction granulation and the temperature and the speed of the air flow.

The water content of the ceramic pug that current broken granulation equipment of ceramic pug can handle generally is between 8% ~ 10%, when the water content is higher or the inlayer roughness is inhomogeneous, can cause two problems, and the sieve mesh can be stopped up to pug among the granulation process, and secondly the powder granule can bond together again after the granulation and form the bold granule. Therefore, the existing equipment has high requirements on the water content of the ceramic pug to be treated, and the water content of the ceramic pug which can be treated is low. However, in this embodiment, the air inlet 121 is arranged to introduce dry air or hot air into the granulation chamber 1, so as to increase the flow speed and/or temperature of the air flow in the granulation chamber 1, which is beneficial to carrying away moisture of powder particles, and to simultaneously granulate and dry ceramic pug with high water content. In addition, after granulation, the mud blocks become fine powder particles, and the specific surface area of the mud blocks is increased, so that the evaporation of the moisture of the powder particles is facilitated, the drying speed of the ceramic mud is increased, and the drying cost is saved; in addition, through introducing the hot air current in the granulation storehouse 1, when the pug of higher moisture content is in the friction granulation, the pug of adhesion on the sieve mesh because contact hot air current or hot metal circular arc screen cloth 23, its surface moisture loses rapidly and the volume diminishes and surface viscosity reduces, consequently very easily drops from the sieve mesh, has solved the problem that the sieve mesh was easily stuck with the pug when current equipment was granulation.

Claims

1. The utility model provides a multistage granulation equipment of ceramic pug, includes the granulation storehouse, its characterized in that: at least 2 friction granulation layers are arranged in the granulation bin, and each friction granulation layer is provided with at least 1 friction granulation assembly;

the friction granulation assembly comprises a rotating shaft, a plurality of scrapers and an arc-shaped screen, and the scrapers are uniformly fixed on the rotating shaft; the circular arc-shaped screen mesh is coaxial with the rotating shaft and is arranged right below the rotating shaft, and a plurality of screen holes are formed in the circular arc-shaped screen mesh; a friction gap is formed between the scraper and the circular arc-shaped screen;

2. The ceramic pug multistage granulation apparatus as defined in claim 1, wherein: more than 1 air outlet is seted up in granulation storehouse, the air outlet is connected with the air exhauster through the pipeline.

3. The ceramic pug multistage granulation apparatus as defined in claim 1, wherein: more than 1 air intake and air exit are seted up to the granulation storehouse, air exit and air intake are connected with air exhauster and air-blower through the pipeline respectively.

4. The ceramic pug multistage granulation apparatus as defined in claim 1, wherein: the number of friction granulation modules differs between adjacent friction granulation layers.

5. The ceramic pug multistage granulation apparatus as defined in claim 3, wherein: hot air flow or dry air is introduced into the air inlet, and the temperature of the hot air flow is 40-100 ℃.

6. The ceramic pug multistage granulation apparatus as defined in claim 5, wherein: the hot air flow is hot flue gas discharged by the kiln.

7. The ceramic pug multistage granulation apparatus as defined in claim 5, wherein: the drying air is fluidized natural air treated by an air dryer.

8. The multistage ceramic sludge granulation apparatus as defined in any one of claims 1 to 7, wherein: guide posts are arranged on two side edges of the circular arc-shaped screen, guide grooves matched with the guide posts are arranged on the front side plate and the rear side plate of the granulation cabin, and a replacement opening allowing the circular arc-shaped screen to enter and exit is formed in the left side plate.

9. The multistage ceramic sludge granulation apparatus as defined in any one of claims 1 to 7, wherein: the granulation cabin is internally provided with 5 friction granulation layers, the aperture of the sieve pores of the friction granulation component respectively positioned on the 5 friction granulation layers from top to bottom is 3.5-3 mm, 2.8-2.5 mm, 2.3-2 mm, 1.8-1.5 mm and 1.3-1 mm in sequence, and the friction gap on the friction granulation component is slightly larger than or equal to the aperture of the sieve pores.

10. The ceramic pug multistage granulation apparatus as defined in claim 9, wherein: along the granulation chamber from top to bottom, the number of the friction granulation modules located on the odd-numbered friction granulation layers is 1, and the number of the friction granulation modules located on the even-numbered friction granulation layers is 2.