Drying granulator

Abstract

This invention relates to a drying granulator, comprising: a shell having a cylindrical shape, the shell having radially spaced inner and outer walls defining a heating space for containing a heating medium; a rotor including a plurality of blades projecting radially outward on its outer surface, the plurality of blades including: a first blade shaped to coat sludge onto an inner surface of the inner wall facing the rotor; a second blade shaped to facilitate mixing of sludge of different viscosities; a third blade shaped to scrape the dried sludge from the inner surface of the inner wall, causing it to detach and facilitating sludge granulation; and a fourth blade shaped to contact the granulated sludge with the inner surface of the inner wall, further drying the granulated sludge and controlling the particle size of the granulated sludge to a set size and shape.

Description

Technical Field

[0001] This invention relates to a drying granulator. Background Technology

[0002] Before final disposal or resource utilization (such as incineration, carbonization, gasification, or building material use), dewatered sludge generally needs to have its moisture content reduced to below 40%. Drying is the main technical route to achieve this goal, and therefore it is an important intermediate link in the entire sludge treatment and disposal chain. To facilitate sludge disposal and resource utilization, in addition to reducing the moisture content of the sludge, it is often necessary to granulate the dried product, such as granulating powdered dried sludge to produce products of a certain shape and particle size for easy transportation, storage, and disposal. Therefore, granulation equipment is usually installed after the drying unit. Granulation is typically a high-energy-consuming and safety-hazardous process, increasing investment and adding complexity to operation. If granulation is performed simultaneously during the drying process, significant technological advantages can be demonstrated. Summary of the Invention

[0003] To overcome the above problems, the present invention provides a drying granulator, comprising:

[0004] The housing has a cylindrical shape and has radially spaced inner and outer walls, thereby defining a heating space for containing the heating medium;

[0005] The feed inlet, located at one end of the shell, is used to receive sludge and is connected to the interior of the shell;

[0006] The discharge port is located at the opposite end of the shell and is connected to the inside of the shell; it is used to discharge the treated sludge.

[0007] A rotor, disposed inside a housing and extending coaxially with the housing, includes a plurality of blades projecting radially outward on its outer surface, the plurality of blades comprising:

[0008] The first blade, a first section along the length of the rotor, is spirally disposed on the outer surface of the rotor, the first section being adjacent to the feed inlet, and the shape of the first blade is designed to coat the sludge onto the inner surface of the inner wall facing the rotor.

[0009] The second blade, which is spirally disposed on the outer surface of the rotor along the first section of the rotor length, is spaced apart from the first blade and is shaped to promote the mixing of sludge of different viscosity.

[0010] The third blade, which is spirally disposed on the outer surface of the rotor along the length of the rotor in the second section, is continuous with the first section. The shape of the third blade is designed to scrape the dried sludge from the inner surface of the inner wall, causing it to fall off and promoting the granulation of the sludge.

[0011] The fourth blade is spirally arranged on the outer surface of the rotor along the second section of the rotor length. The fourth blade is spaced apart from the third blade. The shape of the fourth blade is designed to make the granulated sludge contact the inner surface of the inner wall, so as to further dry the granulated sludge and control the particle size of the granulated sludge to a set size and shape.

[0012] Advantageously, the first blade includes a first substrate and torsional blades and bending blades disposed on opposite sides of the first substrate, the first substrate being disposed on the outer surface of the rotor, and the torsional blades and bending blades being spaced apart from the inner surface of the inner wall.

[0013] The torsion blade is torsion at a predetermined angle relative to the substrate, and the bending blade is bent at a predetermined angle relative to the substrate, such that during rotor rotation, the torsion blade pushes the sludge toward the bending blade, and the bending blade coats the sludge onto the inner surface of the inner wall.

[0014] Advantageously, the second blade includes a second base plate and a first torsion blade and a second torsion blade disposed on opposite sides of the second base plate. The second base plate is disposed on the outer surface of the rotor. The first torsion blade is torsionally rotated relative to the second base plate by a first angle, and the second torsion blade is torsionally rotated relative to the second base plate by a second angle. The first angle is greater than the second angle.

[0015] The first torsion blade is designed to propel sludge with increasing viscosity, while the second torsion blade is designed to propel sludge with decreasing viscosity, thereby promoting the mixing of two sludge types with different adhesion.

[0016] Advantageously, the third blade includes a third base plate and third torsion blades and straight blades disposed on opposite sides of the third base plate, the third base plate being disposed on the outer surface of the rotor, and the third torsion blades being torsionally relative to the third base plate by a predetermined angle.

[0017] The third torsional blade pushes the dried sludge towards the straight blade, which then scrapes the dried sludge off the inner surface of the inner wall, causing it to fall off and promoting the granulation of the dried sludge.

[0018] Advantageously, the fourth blade includes a fourth substrate and a first bent blade and a second bent blade disposed on opposite sides of the fourth substrate. The fourth substrate is disposed on the outer surface of the rotor. The first bent blade is bent at a first angle relative to the fourth substrate, and the second bent blade is bent at a second angle relative to the fourth substrate. The top tip of the inner surface of the first bent blade and / or the second bent blade facing the inner wall is provided with serrations.

[0019] The first and second bending blades are designed to bring the granulated sludge into contact with the inner surface of the inner wall, further drying the granulated sludge. The serrations control the particle size of the granulated sludge to a set size and shape, thus obtaining shaped granulated sludge.

[0020] Advantageously, the housing comprises multiple sections,

[0021] The drying granulator includes heating pipes that are connected to each of a plurality of sections, thereby supplying heating medium to each section into the heating space.

[0022] Advantageously, the heating medium supplied to multiple sections of the heating pipe has different parameters.

[0023] Advantageously, the drying granulator includes a drive system comprising:

[0024] Drive motor;

[0025] A speed reducer is connected to a drive motor and a rotor, thereby transmitting the driving force of the drive motor to the rotor to make the rotor rotate.

[0026] Advantageously, the drying granulator also includes a cooling system and a grease dispenser, the cooling system being connected to a reducer for providing cooling to the drive system, and the grease dispenser for providing grease to the bearings of the drying granulator.

[0027] Advantageously, the drying granulator also includes a thermal imaging camera mounted on the shell for real-time monitoring of the temperature of the inner wall of the drying granulator and the sludge forming condition. Based on the monitoring results, the camera adjusts the blade arrangement, optimizes the distribution of the thin sludge layer, or automatically adjusts the parameters of the heating medium to improve the efficiency of drying and granulation. The thermal imaging camera includes:

[0028] Mounting bracket, install it into the housing, and mount the camera into the mounting bracket;

[0029] A glass observation panel is installed on the housing, and a camera is mounted so that it is aligned with the glass observation panel, enabling monitoring of the interior of the housing through the glass observation panel.

[0030] Advantageously, the thermal imaging device includes:

[0031] Rinse water inlet;

[0032] The nozzle is connected to the flushing water inlet and is oriented toward the glass observation panel, so that the nozzle receives flushing water and sprays flushing water onto the glass observation panel.

[0033] Advantageously, the drying granulator also includes a moisture measuring device located near the discharge port. This moisture measuring device can collect sludge samples from the drying granulator in real time, perform moisture detection, and automatically adjust the parameters of the heating medium based on the monitoring results to ensure efficient drying and granulation.

[0034] Advantageously, the drying granulator further includes an axially displaced self-aligning roller bearing, which is fitted inside a bearing housing flange, comprising:

[0035] Outer ring;

[0036] The self-aligning transition ring is located inside the outer ring.

[0037] The inner ring is located inside the self-aligning filter ring and is configured to be able to move axially.

[0038] Cylindrical rollers are positioned between the self-aligning filter ring and the inner ring and are held in place by roller cages.

[0039] Advantageously, the outer surface of the rotor is provided with a plurality of ribs extending in the axial direction and spaced apart in the circumferential direction, and the blades are mounted on the plurality of ribs, which include first ribs and second ribs that are different from each other, and the first ribs and second ribs are arranged alternately to each other. Attached Figure Description

[0040] The above and other features and advantages of exemplary embodiments of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, which are for illustrative purposes only and are not intended to limit the scope of the invention in any way, wherein:

[0041] Figure 1 A front view of the drying granulator according to the present invention is shown.

[0042] Figure 2 A left view of the drying granulator according to the present invention is shown.

[0043] Figure 3 A right view of the drying granulator according to the present invention is shown.

[0044] Figure 4 A front view of the rotor of the drying granulator according to the present invention is shown.

[0045] Figure 5 A left view of the rotor is shown.

[0046] Figure 6 A front view of the first stiffener of the rotor is shown.

[0047] Figure 7 A front view of the rotor's second stiffener is shown.

[0048] Figure 8A plan view of the rotor is shown, illustrating the arrangement of the various blades.

[0049] Figures 9a-9c The front view and sectional view of the first blade are shown.

[0050] Figure 10 The end view of the first blade is shown.

[0051] Figures 11a-11c The front view and sectional view of the second blade are shown.

[0052] Figure 12 The end view of the second blade is shown.

[0053] Figures 13a-13c The front view and sectional view of the third blade are shown.

[0054] Figure 14 The end view of the third blade is shown.

[0055] Figures 15a-15c The front view and sectional view of the fourth blade are shown.

[0056] Figure 16 The end view of the fourth blade is shown.

[0057] Figure 17 A schematic diagram of a thermal imaging camera device is shown.

[0058] Figure 18 A schematic diagram of a moisture measuring device is shown.

[0059] Figure 19 A schematic diagram of an axial displacement self-aligning roller bearing is shown. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0061] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this disclosure may have fewer components, other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0062] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Where the number of components is not specified, the number of components may be one or more; similarly, the terms “a,” “the,” “described,” and similar terms do not necessarily indicate a quantity limitation. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “install,” “set,” “connect,” or “link,” and similar terms are not limited to physical or mechanical installation, setting, or connection, but may include electrical installation, setting, or connection, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate the relative positional relationship of the equipment during use or the positional relationship shown in the accompanying drawings; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0063] During the thermal drying process, the dewatered sludge from wastewater treatment plants undergoes the following evolution: Initially, it is in a paste or cake form, making it difficult to flow. After heating, its fluidity increases, and it can easily spread onto metal surfaces. At this stage, the evaporation rate is high. After losing some moisture, its adhesion gradually increases, its internal cohesion rises, and its fluidity becomes poor until it reaches its peak. The viscosity peak area is the area where the sludge drying efficiency is low because the strong cohesion at this point makes the efficiency of mass transfer and heat transfer particularly poor. After further moisture loss, the viscosity decreases, and it begins to split, condense, and granulate. At this stage, the evaporation rate is low. Further, as moisture continues to be removed, the particles gradually break down and become finer, and the viscosity disappears.

[0064] The drying granulator of this application is adapting to the above-mentioned changes in the sludge drying process, and realizes simultaneous granulation during the drying process.

[0065] Figure 1 A front view of the drying granulator according to the present invention is shown. Figure 2 A left view of the drying granulator according to the present invention is shown. Figure 3 A right view of a drying granulator according to the present invention is shown. The drying granulator includes a housing 1 having a cylindrical shape, the housing 1 having an inner wall and an outer wall, although not shown in the figure, the inner and outer walls are radially spaced to define a heating space. During operation, the heating space can receive a heating medium, which heats sludge adhered to the inner surface of the inner wall via the inner wall. The stator inner wall in contact with the sludge is made of composite steel plate or a sprayed material.

[0066] The inlet 12 is located at one end of the shell and communicates with the interior of the shell, allowing sludge to enter the interior of the shell through the inlet. The outlet 13 is located at the other end of the shell opposite to one end and communicates with the interior of the shell, for discharging the treated sludge.

[0067] Rotor 2 is disposed inside the housing and extends coaxially with the housing. The rotor includes a plurality of blades projecting radially outward on its outer surface. For example... Figure 8 As shown, specifically, the multiple blades include a first blade 21, a second blade 22, a third blade 23, and a fourth blade 24. The first blade 21 and the second blade 22 are mainly disposed on the first section of the rotor, and the third blade 23 and the fourth blade 24 are mainly disposed on the second section of the rotor. The first section includes a distribution zone S1 and a drying zone S2. In the distribution zone, sludge is mainly coated onto the inner surface of the inner wall facing the rotor. In the drying zone, the sludge is mainly dried. The second section includes a granulation zone S3 and a shaping zone S4. In the granulation zone, the dried sludge is mainly granulated to form sludge of different particle sizes. In the shaping zone, the dried sludge is shaped to control the different particle sizes to achieve a consistent particle size.

[0068] The first blade 21 is spirally disposed on the outer surface of the rotor along a first section of the rotor length, the first section being adjacent to the feed inlet, and the shape of the first blade is designed to coat the sludge onto the inner surface of the inner wall facing the rotor.

[0069] like Figures 9a-9c As shown in Figure 10, Figure 9a It is along Figure 9b The cross-sectional view taken by line AA. Figure 9c It is along Figure 9b The cross-sectional view taken by line BB shows that the first blade 21 includes a first substrate 211 and a torsion blade 212 and a bending blade 213 disposed on opposite sides of the first substrate. The first substrate 211 is disposed on the outer surface of the rotor, and the torsion blade 212 and the bending blade 213 are spaced apart from the inner surface of the inner wall. The torsion blade 212 is torsionally rotated relative to the first substrate 211 by a predetermined angle α, and the bending blade 213 is bent obliquely relative to the first substrate 211 by a predetermined angle β, such that during rotor rotation, the torsion blade pushes the sludge toward the bending blade, and the bending blade coats the sludge onto the inner surface of the inner wall, thereby forming a thin sludge layer that can be rapidly heated by the inner wall. Figure 9b As shown, the angle of inclination of the bending blade 213 relative to the first substrate 211 is φ. The aforementioned angles α, β, and φ can be adjusted according to the characteristics of the sludge.

[0070] The second blade 22 is spirally disposed on the outer surface of the rotor along a first section of the rotor length. The second blade is spaced apart from the first blade and is shaped to promote the mixing of sludge of different viscosity.

[0071] like Figures 11a-11c As shown in Figure 12, Figure 11a It is along Figure 11b The cross-sectional view taken by line AA. Figure 11c It is along Figure 11b The cross-sectional view taken from line BB shows that the second blade 22 includes a second base plate 221 and a first torsion blade 222 and a second torsion blade 223 disposed on opposite sides of the second base plate. The second base plate 221 is disposed on the outer surface of the rotor. The first torsion blade 222 is torsionally rotated relative to the second base plate by a first angle α, and the second torsion blade 223 is torsionally rotated relative to the second base plate by a second angle β, wherein the first angle is greater than the second angle. The aforementioned angles α and β can be adjusted according to the characteristics of the sludge.

[0072] The first torsion blade 222 is suitable for propelling sludge with increased viscosity or poor flowability, while the second torsion blade 223 is suitable for propelling sludge with decreased viscosity or good flowability. This promotes the mixing of sludge in both states, which can shorten the time it takes for sludge to cross the viscosity peak zone and improve drying efficiency.

[0073] The third blade 23 is spirally disposed on the outer surface of the rotor along the second section of the rotor length. This second section is continuous with the first section. The shape of the third blade is designed to scrape the dried sludge from the inner surface of the inner wall, causing it to fall off and promoting the granulation of the sludge.

[0074] like Figures 13a-13c As shown in Figure 14, Figure 13a It is along Figure 13b The cross-sectional view taken by line AA. Figure 13c It is along Figure 13b The cross-sectional view taken from line BB shows that the third blade includes a third base plate 231 and third torsional blades 232 and straight blades 233 disposed on opposite sides of the third base plate. The third base plate 231 is disposed on the outer surface of the rotor, and the third torsional blades 232 are torsional relative to the third base plate by a predetermined angle α. The aforementioned angle α can be adjusted according to the characteristics of the sludge.

[0075] The third torsional blade pushes the dried, less viscous sludge towards the working area of ​​the straight blade, whereby the straight blade scrapes the dried sludge off the inner surface of the inner wall, causing it to fall off and promoting the granulation of the dried sludge.

[0076] The fourth blade 24 is spirally disposed on the outer surface of the rotor along the second section of the rotor length. The fourth blade is spaced apart from the third blade. The shape of the fourth blade is designed to make the granulated sludge contact the inner surface of the inner wall, so as to further dry the granulated sludge and control the particle size of the granulated sludge to a set size and shape.

[0077] like Figures 15a-15cAs shown in Figure 16, Figure 15a It is along Figure 15b The cross-sectional view taken by line AA. Figure 15c It is along Figure 15b The cross-sectional view taken by line BB shows that the fourth blade 24 includes a fourth substrate 241 and a first bent blade 242 and a second bent blade 243 disposed on opposite sides of the fourth substrate. The fourth substrate 241 is disposed on the outer surface of the rotor. The first bent blade 242 is bent at a first angle α relative to the fourth substrate 241, and the second bent blade 243 is bent at a second angle β relative to the fourth substrate. The top end of the inner surface of the first bent blade and / or the second bent blade facing the inner wall is provided with serrations. Preferably, the top end of the inner surface of the second bent blade facing the inner wall is provided with serrations 244.

[0078] The first and second bending blades are designed to act on sludge of different particle sizes, causing the granulated sludge to continuously contact and be heated with the inner surface of the inner wall, further drying the granular sludge. The serrations at the tips of the blades also control the particle size of the final dried particles to a set size and shape, obtaining a shaped dried product.

[0079] The outer surface of the rotor is provided with multiple ribs extending axially and spaced circumferentially. The blades are mounted on these ribs, such as... Figure 4 and 5 As shown, the plurality of stiffeners includes first stiffeners 25 that are different from each other. Figure 6 An example of the first stiffener (the dimensions are merely exemplary) and the second stiffener 26 (shown as an example) Figure 7 An example of a second stiffener is shown (the dimensions are merely exemplary). The first stiffener 25 and the second stiffener 26 are staggered, meaning that a second stiffener is positioned between two adjacent first stiffeners, and a first stiffener is positioned between two adjacent second stiffeners. The aforementioned blade is mounted to the stiffener via a base plate.

[0080] like Figure 1 As shown, the housing 1 comprises multiple interconnected sections. The heating pipe 3 of the drying granulator (controlled by valve 4) is connected to each of these sections and communicates with the heating space, thereby supplying heating medium to each section. By setting control valves (not shown in the figure) for the heating medium in each section, the heating medium supplied to each section by the heating pipe 3 can be independently controlled, and the temperature of the heating medium supplied to the multiple sections can be different from each other according to the different temperatures required by the different sections.

[0081] Preferably, the shell 1 comprises four sections, corresponding to the aforementioned drying zone S1, drying zone S2, granulation zone S3, and shaping zone S4, respectively. Thus, the temperature of the heating medium supplied to the drying zone S1, drying zone S2, granulation zone S3, and shaping zone S4 can vary based on the desired temperature. For example, a lower-temperature heating medium can be used in the drying zone S1, while a higher-temperature heating medium can be used in the granulation zone S3. This allows for flexible adjustment of the sludge dryness and also helps improve thermal energy utilization efficiency.

[0082] The shell is a pressure vessel made of container steel. The inner wall in contact with the thin sludge layer can be made of composite steel or sprayed material, depending on the composition of the sludge. The inner diameter of each section of the shell can be selected according to the scale of sludge treatment, with a heating redundancy of 1.05-1.2 and a length-to-diameter ratio (i.e., the ratio of length to inner diameter) of 5.0-6.0.

[0083] The drive system of the drying granulator includes a drive motor 5 and a reducer 6 connected to the drive motor 5 and the rotor, thereby transmitting the driving force of the drive motor to the rotor to make the rotor rotate. The drive motor and the reducer are well known to those skilled in the art, and therefore will not be described in detail herein.

[0084] The drying granulator also includes a cooling system 7 and a grease dispenser 8. The cooling system is connected to the reducer and provides cooling for the drive system. The grease dispenser provides grease to the bearings of the drying granulator, as described below. Similarly, the cooling system and grease dispenser are well known to those skilled in the art and therefore will not be described further herein.

[0085] The drying granulator also includes a thermal imaging camera 10 mounted on the shell, such as... Figure 17 As shown, the thermal imaging camera device is used to monitor the temperature of the inner wall of the drying granulator and the sludge forming status in real time. It includes: a mounting bracket 10-5, which is mounted to the housing 1; a camera 10-2, which is mounted to the mounting bracket; a glass observation plate 10-3, which is mounted to the housing 1; the camera is mounted so as to be aligned with the glass observation plate 10-3 so as to be able to monitor the inside of the housing through the glass observation plate; a flushing water inlet 10-1; and a nozzle 10-4, which is connected to the flushing water inlet 10-1 and faces the glass observation plate so that the nozzle receives flushing water and sprays flushing water onto the glass observation plate.

[0086] The thermal imaging camera 10 monitors the temperature of the inner wall of the dryer cylinder and the sludge forming status in real time through infrared thermal imaging, reflecting the heat exchange status. Based on the monitoring results, it can adjust the blade arrangement, optimize the distribution of the thin sludge layer, or automatically adjust the parameters of the heating medium (such as temperature, parameters, etc.) to improve the efficiency of drying and granulation.

[0087] The drying granulator also includes a moisture measuring device 11 installed at the discharge port. This device can collect sludge samples from inside the drying granulator in real time for moisture detection. Figure 18 As shown, the moisture measuring device includes a window opener 11-1, a sampler 11-2, and a moisture analyzer 11-3. After discharge, the window opener 11-1 is opened, and the sampler 11-2 is used to take a sample. The sample is then tested by the moisture analyzer 11-3 to detect the moisture content of the dried product. Based on the moisture content, the opening degree of the control valve 4 is automatically adjusted, and the parameters of the heating medium are adjusted accordingly.

[0088] The drying granulator also includes axial displacement self-aligning roller bearings 9, such as... Figure 19 As shown, this bearing possesses all the advantages of traditional bearings in terms of load-bearing capacity. It is self-aligning, has a strong load-bearing capacity, and also has an axial compensation function to accommodate the rotor's thermal expansion and cooling contraction. Located inside the bearing housing flange, it includes: an outer ring 9-1, positioned within the inner hole of the bearing housing flange, with an arc in its inner hole that matches the arc of the outer diameter of the self-aligning transition ring 9-2, providing a self-aligning function; a self-aligning transition ring 9-2, located inside the outer ring, with an arc in its outer diameter that matches the arc of the inner diameter of the outer ring 9-1, achieving a self-aligning function, and its inner diameter matching the cylindrical roller 9-4, achieving load-bearing and rotational rolling functions; an inner ring 9-3, whose outer diameter matches the cylindrical roller 9-4, achieving load-bearing and rotational rolling functions, configured to allow axial displacement; and cylindrical rollers 9-4, positioned between the inner diameter of the self-aligning filter ring 9-2 and the inner ring 9-3, held by a roller cage 9-5, preferably made of a high-strength, wear-resistant material. The roller bearing 9 also includes a filling hole 9-6 for receiving grease.

[0089] The drying granulator of this application achieves many advantages:

[0090] Sludge exhibits changes in rheology and cohesion during the drying process. The blade arrangement described in this paper can adapt to the changes in the sludge drying process, creating favorable conditions for simultaneous drying and granulation, and avoiding the safety and high energy consumption problems of granulation after drying.

[0091] Sludge exhibits different heat transfer characteristics and evaporation rates at different stages of the thermal drying process. The segmented stator design allows for the use of heating media with different parameters at different stages, thereby improving energy utilization efficiency.

[0092] The application of axial displacement self-aligning roller bearings improves the service life of the entire machine.

[0093] The stator inner wall, where it comes into contact with sludge, is made of composite steel plate or coated with material, which can improve the service life of the whole machine.

[0094] By using thermal imaging devices to monitor the heat exchange status of the dryer and the material forming device in real time, and by using moisture measuring devices to monitor the moisture content of the product in real time, we can provide a good basis and real-time feedback for adjusting operating parameters, thus creating a foundation for intelligent operation.

[0095] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A drying granulator, characterized in that, The drying granulator includes: The housing has a cylindrical shape and has radially spaced inner and outer walls, thereby defining a heating space for containing the heating medium; The feed inlet, located at one end of the shell, is used to receive sludge and is connected to the interior of the shell; The discharge port is located at the opposite end of the shell and is connected to the inside of the shell; it is used to discharge the treated sludge. A rotor, disposed inside a housing and extending coaxially with the housing, includes a plurality of blades projecting radially outward on its outer surface, the plurality of blades comprising: The first blade, a first section along the length of the rotor, is spirally disposed on the outer surface of the rotor, the first section being adjacent to the feed inlet, and the shape of the first blade is designed to coat the sludge onto the inner surface of the inner wall facing the rotor. The second blade, which is spirally disposed on the outer surface of the rotor along the first section of the rotor length, is spaced apart from the first blade and is shaped to promote the mixing of sludge of different viscosity. The third blade, which is spirally disposed on the outer surface of the rotor along the length of the rotor in the second section, is continuous with the first section. The shape of the third blade is designed to scrape the dried sludge from the inner surface of the inner wall, causing it to fall off and promoting the granulation of the sludge. The fourth blade is spirally arranged on the outer surface of the rotor along the second section of the rotor length. The fourth blade is spaced apart from the third blade. The shape of the fourth blade is designed to make the granulated sludge contact the inner surface of the inner wall, so as to further dry the granulated sludge and control the particle size of the granulated sludge to a set size and shape.

2. The drying granulator as described in claim 1, characterized in that, The first blade includes a first substrate and torsional blades and bending blades disposed on opposite sides of the first substrate. The first substrate is disposed on the outer surface of the rotor, and the torsional blades and bending blades are spaced apart from the inner surface of the inner wall. The torsion blade is torsion at a predetermined angle relative to the substrate, and the bending blade is bent at a predetermined angle relative to the substrate, such that during rotor rotation, the torsion blade pushes the sludge toward the bending blade, and the bending blade coats the sludge onto the inner surface of the inner wall.

3. The drying granulator as described in claim 2, characterized in that, The second blade includes a second base plate and a first torsion blade and a second torsion blade disposed on opposite sides of the second base plate. The second base plate is disposed on the outer surface of the rotor. The first torsion blade is torsionally rotated relative to the second base plate by a first angle, and the second torsion blade is torsionally rotated relative to the second base plate by a second angle. The first angle is greater than the second angle. The first torsion blade is designed to propel sludge with increasing viscosity, while the second torsion blade is designed to propel sludge with decreasing viscosity, thereby promoting the mixing of two sludge types with different adhesion.

4. The drying granulator as described in claim 3, characterized in that, The third blade includes a third base plate and third torsion blades and straight blades disposed on opposite sides of the third base plate. The third base plate is disposed on the outer surface of the rotor, and the third torsion blades are torsionally rotated relative to the third base plate by a predetermined angle. The third torsional blade pushes the dried sludge towards the straight blade, which then scrapes the dried sludge off the inner surface of the inner wall, causing it to fall off and promoting the granulation of the dried sludge.

5. The drying granulator as described in claim 4, characterized in that, The fourth blade includes a fourth substrate and a first bent blade and a second bent blade disposed on opposite sides of the fourth substrate. The fourth substrate is disposed on the outer surface of the rotor. The first bent blade is bent at a first angle relative to the fourth substrate, and the second bent blade is bent at a second angle relative to the fourth substrate. The top tip of the inner surface of the first bent blade and / or the second bent blade facing the inner wall is provided with serrations. The first and second bending blades are designed to bring the granulated sludge into contact with the inner surface of the inner wall, further drying the granulated sludge. The serrations control the particle size of the granulated sludge to a set size and shape, thus obtaining shaped granulated sludge.

6. The drying granulator according to any one of claims 1 to 5, characterized in that, The housing comprises multiple sections. The drying granulator includes heating pipes that are connected to each of a plurality of sections, thereby supplying heating medium to each section into the heating space.

7. The drying granulator as described in claim 6, characterized in that, The heating medium supplied to multiple sections of the heating pipeline has different parameters.

8. The drying granulator according to any one of claims 1 to 5, characterized in that, The drying granulator includes a drive system, which comprises: Drive motor; A speed reducer is connected to a drive motor and a rotor, thereby transmitting the driving force of the drive motor to the rotor to make the rotor rotate.

9. The drying granulator as described in claim 8, characterized in that, The drying granulator also includes a cooling system and a grease injector. The cooling system is connected to the reducer to provide cooling for the drive system, and the grease injector is used to provide grease to the bearings of the drying granulator.

10. The drying granulator according to any one of claims 1 to 5, characterized in that, The drying granulator also includes a thermal imaging camera installed on the shell, which is used to monitor the temperature of the inner wall of the drying granulator and the sludge forming condition in real time, including: Mounting bracket, install it into the housing, and mount the camera into the mounting bracket; A glass observation panel is installed on the housing, and a camera is mounted so that it is aligned with the glass observation panel, enabling monitoring of the interior of the housing through the glass observation panel.

11. The drying granulator as described in claim 10, characterized in that, The thermal imaging camera device includes: Rinse water inlet; The nozzle is connected to the flushing water inlet and is oriented toward the glass observation panel, so that the nozzle receives flushing water and sprays flushing water onto the glass observation panel.

12. The drying granulator according to any one of claims 1 to 5, characterized in that, The drying granulator also includes a moisture measuring device located near the discharge port, which can collect sludge samples from inside the drying granulator in real time for moisture detection.

13. The drying granulator according to any one of claims 1 to 5, characterized in that, The drying granulator also includes an axial displacement self-aligning roller bearing, which is fitted inside the bearing housing flange, including: Outer ring; The self-aligning transition ring is located inside the outer ring. The inner ring is located inside the self-aligning filter ring and is configured to be able to move axially. Cylindrical rollers are positioned between the self-aligning filter ring and the inner ring and are held in place by roller cages.

14. The drying granulator according to any one of claims 1 to 5, characterized in that, The outer surface of the rotor is provided with a plurality of ribs extending in the axial direction and spaced apart in the circumferential direction. The blades are mounted on the plurality of ribs. The plurality of ribs include a first rib and a second rib that are different from each other. The first rib and the second rib are arranged alternately.

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