阅读说明：本技术 立式污泥破碎机以及用其破碎污泥的方法 (Vertical sludge crusher and method for crushing sludge by using same ) 是由 谭玮 于 2018-06-01 设计创作，主要内容包括：本发明涉及一种立式污泥破碎机以及用其破碎污泥的方法。该立式污泥破碎机包括：由上盖、筒身和底座构成的壳体；转动轴；固定连接到所述转动轴上的至少一个破碎部件；以及防泥挡网装置。所述防泥挡网装置包括：设置在所述筒身与所述转动轴之间且靠近所述筒身的防泥挡网,其包围所述至少一个破碎部件；以及用于将防泥挡网弹性地悬挂在所述筒身的内壁上的至少一个弹性连接装置。本发明还提供了利用该立式污泥破碎机对污泥块体进行破碎的方法。(The invention relates to a vertical sludge crusher and a method for crushing sludge by using the same. This vertical sludge crusher includes: a shell body composed of an upper cover, a cylinder body and a base; a rotating shaft; at least one crushing member fixedly connected to the rotating shaft; and a mud-proof blocking net device. The mud-proof blocking net device comprises: a mud guard disposed between the barrel and the shaft and proximate the barrel surrounding the at least one crushing member; and at least one elastic connecting device for elastically hanging the mud-guard net on the inner wall of the cylinder body. The invention also provides a method for crushing the sludge block by using the vertical sludge crusher.)

1. A vertical sludge crusher comprising:

The casing, the casing forms the inner space that is used for holding inner structure and receipt mud block, the casing includes upper cover, stack shell and base to still including setting up be used for the mud block on casing upper portion to get into the feed inlet in the casing, wherein:

The upper cover includes a shaft hole at the center thereof,

The base comprises a cylindrical table positioned at the center of the base, the cylindrical table comprises a shaft hole positioned at the center of the base, and a discharge hole for discharging sludge is formed in the base; and

The cylinder body is formed into a cylinder shape with two open ends, the upper cover covers the upper end opening of the cylinder body, the base is connected to the lower end opening of the cylinder body, and when the cylinder body and the base are assembled together, the centers of the shaft hole of the upper cover and the shaft hole of the cylindrical table of the base are both positioned on the longitudinal central axis of the cylinder body;

A rotating shaft disposed so that an axis thereof coincides with a longitudinal center axis of the barrel, a lower end of the rotating shaft passing through a shaft hole of a cylindrical table of the base and rotatably supported in the cylindrical table, and an upper end of the rotating shaft passing through a shaft hole of the upper cover and rotatably supported in the shaft hole of the upper cover;

at least one crushing member fixedly connected to the rotating shaft and drivable by the rotating shaft to rotate about a longitudinal central axis of the barrel for crushing a sludge mass entering the barrel from the feed inlet;

Prevent mud and keep off net device, prevent mud and keep off net device and include:

the mud-proof blocking net is arranged between the cylinder body and the rotating shaft, is close to the cylinder body, surrounds the at least one crushing component and is used for preventing sludge or dust from being stuck on the inner wall of the cylinder body; and

at least one elastic connection device for elastically suspending the mud guard net on the inner wall of the barrel.

2. A vertical sludge crusher as claimed in claim 1, wherein said at least one elastic connecting means is at least one spring having one end connected to said mud guard and the other end connected to a ring provided on the inner wall of said barrel so as to suspend said mud guard on the inner wall of said barrel.

3. The vertical sludge crusher as claimed in claim 2, wherein the at least one spring is twelve springs, the twelve springs are divided into three groups of four springs, the three groups of springs are connected to the upper end, the middle end and the bottom end of the mud guard, respectively, and the four springs within each group are evenly spaced in the circumferential direction.

4. The vertical sludge crusher of claim 1 wherein the at least one resilient attachment means is at least one of a flexible cable or a flexible rod.

5. The vertical sludge crusher as claimed in claim 1, wherein the mud guard net is provided with a vibrator.

6. The vertical sludge crusher as claimed in claim 1, wherein the outer wall of the barrel is provided with a vibrator.

7. The vertical sludge crusher as claimed in claim 1, wherein the barrel has a hollow cylindrical shape.

8. the vertical sludge crusher as claimed in claim 1, wherein the barrel body has a hollow polygonal barrel shape.

9. the vertical sludge crusher as claimed in claim 1, wherein the mud guard is a net ring formed by a plurality of annular bars and vertical bars.

10. the vertical sludge crusher as claimed in claim 1, wherein the mud guard is a filter cloth, a net-shaped plastic product, or a perforated metal product.

11. A method of crushing a sludge block using a vertical sludge crusher according to any one of claims 1 to 10, the method comprising the steps of:

Driving a rotating shaft of the vertical sludge crusher to rotate, thereby rotating the at least one crushing member connected to the rotating shaft;

Feeding the sludge block from the feeding hole into the vertical sludge crusher so as to be crushed by the at least one crushing component;

After the sludge block is crushed, stopping inputting the sludge block from the feeding hole; and

Stopping the vertical sludge crusher to stop the rotation of the rotating shaft.

12. the method of claim 11, wherein a vibrator is provided on the anti-mud fence and the method further comprises the steps of: and starting the vibrator to vibrate the anti-mud blocking net so as to vibrate the sludge on the anti-mud blocking net.

13. The method of claim 11, wherein a vibrator is provided on an outer wall of the shaft, and the method further comprises the steps of: and starting the vibrator to vibrate the cylinder body so as to vibrate the sludge on the inner wall of the cylinder body.

Technical Field

The present invention relates to the field of sludge crushing, in particular to a vertical sludge crusher, and more particularly to a vertical sludge crusher having a mud guard device with a self-cleaning function, and a method for sludge crushing using the vertical sludge crusher according to the present invention.

Background

The current deep dehydration treatment of sludge generally adopts a mechanical filter-pressing dehydration mode to carry out solid-liquid separation on the sludge. Compared with other solid-liquid separation modes, the mud cake after mechanical filter pressing dehydration has high solid content. The treated sludge cake is in a block shape, generally has the water content of 40-75%, has high hardness, is not easy to break, and has partial viscosity. In order to facilitate the subsequent sludge transportation and treatment, the sludge cake is usually subjected to a crushing treatment.

Mechanical crushing of sludge is a common crushing treatment, and the used equipment is mainly sludge crushers, including but not limited to jaw crushers, gyratory crushers, cone crushers, hammer crushers, roller crushers and vibratory crushers. Recently, vertical sludge crushers, which employ a rotating crushing member and a vertical installation manner, are increasingly employed due to their small footprint, convenient operation and maintenance characteristics, and low cost. However, in the vertical sludge crusher, when the sludge block is crushed by the crushing member rotating at a high speed, the sludge is easily adhered to the inner wall of the crusher housing due to the viscosity of the sludge. If not in time clear up, the mud on the shells inner wall will be amasss the more thick more, not only is difficult to clear up, can lead to the inner space of breaker to diminish gradually moreover to easily lead to broken part to damage.

one conventional way is to shut down the sludge adhered to the inner wall of the vertical sludge crusher in order to clean it, but doing so affects production, reduces efficiency, and increases labor and maintenance costs. Another way to solve the problem of sludge sticking to the inner wall is to provide a sludge removal device. It is known to provide a rotary type wall scraping and mud removing device in a vertical sludge crusher, wherein a scraper of the rotary type wall scraping and mud removing device is fixedly connected with a rotating shaft of the vertical sludge crusher and rotates at a high speed together with the rotating shaft when in operation, so that sludge adhered to the inner wall of a housing is scraped by the scraper. However, since the sludge has a characteristic of being more viscous and more viscous with stirring, when the scraper of the rotary type wall scraping and sludge removing device scrapes the sludge with high-speed rotation, a side effect of stirring the sludge adhered to the inner wall is rather played to a certain extent, so that the sludge is more viscous and more solid with more scraping, the sludge or dust is more viscous and more viscous, and the sludge adhered to the inner wall forms lumps and is difficult to clean. Furthermore, the blades of the rotary type wall scraping and silt removing apparatus rotate at high speed together with the rotating shaft of the crusher when in operation, which also makes the blades thereof highly vulnerable to damage or wear.

Disclosure of Invention

in order to solve the above technical problems in the art, the present invention provides a vertical sludge crusher, which can achieve both efficient crushing of sludge blocks and sludge particles, thereby crushing them into fragments or powder, and solving the problem of adhesion of sludge on the inner wall of the crusher housing.

According to the present invention, there is provided a vertical sludge crusher comprising: the sludge treatment device comprises a shell, a sludge storage tank and a sludge conveying device, wherein the shell forms an inner space for accommodating an inner structure and receiving sludge blocks, and comprises an upper cover, a barrel body and a base, and further comprises a feeding hole which is arranged at the upper part of the shell and used for feeding the sludge blocks into the shell; a rotating shaft; at least one crushing member; and a mud-proof blocking net device. The upper cover comprises a shaft hole positioned at the center of the upper cover, the base comprises a cylindrical table positioned at the center of the upper cover, the cylindrical table comprises a shaft hole positioned at the center of the upper cover, and a discharge hole for discharging sludge is formed in the base; and the cylinder body is formed into a cylinder shape with two open ends, the upper cover covers the upper end opening of the cylinder body, and the base is connected to the lower end opening of the cylinder body. When assembled together, the centers of the shaft hole of the upper cover and the shaft hole of the cylindrical table of the base are both positioned on the longitudinal central axis of the cylinder body. The rotating shaft is arranged so that the axis thereof coincides with the longitudinal center axis of the barrel, the lower end of the rotating shaft passes through the shaft hole of the cylindrical table of the base and is rotatably supported in the cylindrical table, and the upper end of the rotating shaft passes through the shaft hole of the upper cover and is rotatably supported in the shaft hole of the upper cover. The at least one crushing member is fixedly connected to the rotating shaft and is drivable by the rotating shaft to rotate about a longitudinal central axis of the barrel for crushing sludge mass entering the barrel from the feed inlet. The mud-proof blocking net device comprises: a mud-proof screen disposed between the barrel and the rotating shaft, adjacent to the barrel, and surrounding the at least one crushing member, for preventing sludge or dust from sticking to an inner wall of the barrel; and at least one elastic connecting device for elastically hanging the mud-guard net on the inner wall of the cylinder body.

In another embodiment, the at least one resilient connecting means is at least one spring having one end connected to the mud guard and the other end connected to a ring provided on the inner wall of the barrel for suspending the mud guard on the inner wall of the barrel. In another embodiment, the at least one spring is twelve springs, the twelve springs are divided into three groups of four springs, the three groups of springs are respectively connected to the upper end, the middle end and the bottom end of the mud guard net, and the four springs in each group are uniformly distributed at intervals in the circumferential direction. In another embodiment, the at least one elastic connection means is at least one elastic cord or a flexible rod.

In another embodiment, a vibrator is disposed on the mud guard net. In another embodiment, a vibrator is arranged on the outer wall of the barrel body.

In another embodiment, the barrel has a hollow cylindrical shape. In another embodiment, the barrel has a hollow polygonal barrel shape.

In another embodiment, the mud barrier net is formed by a plurality of annular bars and vertical bars forming a net loop. In another embodiment, the mud guard is a filter cloth, a reticulated plastic product, or a perforated metal product.

There is also provided a method of crushing a sludge block using a vertical sludge crusher according to the present invention, the method comprising the steps of: driving a rotating shaft of the vertical sludge crusher to rotate, thereby rotating the at least one crushing member connected to the rotating shaft; the sludge block is input into the vertical sludge crusher from the feed port so as to be crushed by the at least one crushing component, and the crushed sludge is discharged from the discharge port; after the sludge block is crushed, stopping inputting the sludge block from the feeding hole; and stopping the vertical sludge crusher to stop the rotation of the rotating shaft.

in another embodiment, a vibrator is provided on the mud guard net, the method further comprising the steps of: and starting the vibrator to vibrate the anti-mud blocking net so as to vibrate the sludge on the anti-mud blocking net. In another embodiment, a vibrator is provided on the barrel, and the method further comprises the steps of: and starting the vibrator to vibrate the cylinder body so as to vibrate the sludge on the inner wall of the cylinder body.

The vertical sludge crusher according to the present invention not only solves the above-mentioned problems in the art, but also has a sludge preventing net device capable of achieving a self-cleaning effect.

Drawings

The foregoing and other objects, features and advantages of the invention will be more fully appreciated and understood from the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 schematically illustrates, in a longitudinal cut-away view, a vertical sludge crusher according to one embodiment of the present invention;

FIG. 2 schematically illustrates, in perspective cut-away view, the vertical sludge crusher shown in FIG. 1;

Fig. 3 schematically shows, in perspective view, a mud guard device in the vertical sludge crusher shown in fig. 1;

FIG. 4 schematically illustrates, in perspective view, a base in the vertical sludge crusher shown in FIG. 1;

Fig. 5 shows a flow diagram of an embodiment of a method for performing sludge mass fragmentation using the vertical crusher shown in fig. 1.

Detailed Description

A detailed description will be provided below regarding embodiments of the present invention. While several embodiments have been described, it should be understood that the present invention is not limited to any one embodiment, but encompasses numerous alternatives, modifications, and equivalents. Furthermore, while numerous specific details are set forth in the following description in order to provide a thorough understanding of the embodiments disclosed herein, some embodiments may be practiced without some or all of these details. Moreover, for the purpose of clarity, certain techniques, structures, materials, and so forth known in the relevant art have not been described in detail in order to avoid obscuring the present application.

Embodiments of the invention will be best understood from the following description with reference to the accompanying drawings. It should be understood that the drawings herein are not to scale and that like or similar reference numerals indicate like or similar parts and features for clarity of illustration. Furthermore, the various embodiments of the present invention described in this application are intended as examples only, to facilitate a better understanding of the invention, and therefore should not be taken as limiting the invention. Furthermore, it is to be noted that the technical features included in the respective embodiments described in the present application can be arbitrarily combined without departing from the technical principles, and the technical solutions obtained by the combination should also be considered to be within the scope of the present invention. Moreover, the steps of a method do not necessarily have to be performed in any particular order, nor do the steps necessarily have to be performed only once, unless otherwise indicated. It is also noted that any one or more of these steps may be deleted, modified or combined with other steps without departing from the basic principles of the invention.

As used herein, the terms "comprises," "comprising," "has," "having," "includes," "including," "contains," "containing," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product and/or process that comprises a list of features does not include only those features but may include other features not expressly listed and/or inherent to such product and/or process. Further, as used herein, the terms "connected," "coupled," and any other variation thereof encompass a direct connection as well as an indirect connection via intermediate components or structures.

Referring to fig. 1 and 2, a vertical sludge crusher 1 according to an embodiment of the present invention is shown in longitudinal and perspective cutaway views, respectively. The vertical sludge crusher 1 includes a housing 2, the housing 2 being generally vertically arranged and may include a barrel 201, a base 202, and an upper cover 203. It should be noted here that the descriptions referred to in this application as referring to the orientation such as "upper", "lower", "upper" and "lower" are made with reference to the mounting arrangement of the vertical sludge crusher 1 during normal use, for example, the mounting arrangement of the vertical sludge crusher 1 shown in fig. 1. That is, the housing 2 of the vertical sludge crusher 1 includes, in order from top to bottom, an upper cover 203, a barrel 201, and a base 202. The barrel 201 is formed in a cylindrical shape with both ends open, the upper cover 203 covers the upper end opening of the barrel 201 and is connected thereto in any known suitable manner, and the base 202 is connected to the lower end opening of the barrel 201 in any known suitable manner. Suitable means include, but are not limited to, for example, welding, riveting, screwing, and the like. Further, the upper cover 203 and the barrel 201, or the base 202 and the barrel 201, or the upper cover 203 and the base 202 and the barrel 201 may be integrally formed by a suitable means, such as casting.

In the embodiment shown in fig. 1 and 2, the barrel 201 has a cylindrical shape. However, the barrel 201 may have any other suitable shape, including, but not limited to, a cylindrical shape having a rectangular, triangular, square, or polygonal cross-section, and when the barrel 201 takes other shapes, the shapes of the upper cover 203 and the base 202 are changed accordingly to fit the upper end opening and the lower end opening of the barrel 201, respectively.

The upper cover 203 has a shaft hole 203a at the center thereof to receive and support the rotating shaft 501 of the vertical sludge crusher 1. In the illustrated embodiment, the upper cover 203 is further provided with a feed inlet 3 for receiving sludge. However, it is easily understood that the feed port 3 may be provided on the barrel 201, for example, at a suitable position in the upper portion of the barrel 201.

With continuing reference to fig. 1 and 2, and in particular to fig. 4, there is schematically shown in perspective view a base 202 in the vertical sludge crusher 1. The base 202 has a cylindrical table 202a at the center thereof, and the cylindrical table 202a includes a shaft hole 202b at the center thereof so as to receive and support the rotating shaft 501 of the vertical sludge crusher 1. In the illustrated embodiment, the base 202 further includes a circular outer frame 202c and a plurality of support rods 202 d. In the embodiment shown in fig. 4, the base 202 has four support rods 202d, but it will be readily appreciated that the base 202 may have any other suitable number of support rods 202 d. The outer frame 202c is used to connect the base 202 to the barrel 201. The support rod 202d is used to connect the outer frame 202c and the cylindrical table 202a at the center of the base 202 to each other so as to support the cylindrical table 202a and the rotating shaft 501 received in the shaft hole 202b of the cylindrical table 202 a. The support rods 202d are uniformly distributed in the circumferential direction, so that discharge ports 4 for discharging the crushed sludge are formed between the adjacent support rods 202 d. It will be appreciated that the base 202 may take other forms as well, including, but not limited to, for example, a circular plate provided with a spout.

as shown in fig. 1 and 2, when the upper cover 203, the base 202, and the barrel 201 are assembled to form the housing 2 of the vertical sludge crusher 1, the center of the shaft hole 203a of the upper cover 203 and the center of the shaft hole 202b of the cylindrical table 202a are both located on the longitudinal center axis of the barrel 201.

The vertical sludge crusher 1 further comprises a rotating shaft 501. The rotation shaft 501 is arranged in the vertical direction such that the longitudinal center axis thereof coincides with the longitudinal center axis of the barrel 201, the lower end of the rotation shaft 501 passes through the shaft hole 202b of the cylindrical table 202a of the base 202 and is rotatably supported in the shaft hole 202b, and the upper end of the rotation shaft 501 passes through the shaft hole 203a of the upper cover 203 and is rotatably supported in the shaft hole 203 a. Rotating shaft 501 includes a bottom flange 504, and bottom flange 504 is intended to abut against the upper surface of cylindrical table 202a when assembled, thereby enabling rotating shaft 501 to be supported on cylindrical table 202 a. The rotating shaft 501 further comprises a number of flanges 503 distributed along its longitudinal length, which flanges 503 are used for connecting and fixing respective crushing members. It will be readily appreciated that bottom flange 504 and/or flanges 504 distributed along the longitudinal length of rotating shaft 501 may be integrally formed with rotating shaft 501, but may also be a separate component fixedly attached to rotating shaft 501 by any suitable means (e.g., welding, threading, riveting, etc.). In fig. 1 and 2 it is shown that four flanges 503 are provided on the longitudinal length of the rotating shaft 501. It will be readily appreciated that this is merely an example. Any suitable number of flanges 503 may be provided at any suitable spacing, as desired. The upper end of the rotary shaft 501 may be connected to a suitable power means via any suitable means so as to be driven to rotate.

the vertical sludge crusher 1 further comprises at least one crushing member for crushing a sludge mass fed into the vertical sludge crusher via the feed opening 3. In the embodiment shown in fig. 1 and 2, the crushing member is a crushing chain 502, one end of which is connected to a flange 504 of the rotating shaft 501 and the other end of which is a free end, whereby when the rotating shaft 501 rotates, the crushing chain 502 is brought to rotate together. When the sludge block enters through the feed port 3, the crushing chain 502 rotates at a high speed, so that the sludge block can be effectively beaten into pieces or granules or powder to realize sludge crushing. As shown, each crushing chain 502 is formed by four looped links that are interlocked. Each link has the same shape, wherein the link connected to the flange 504 has an opening so as to be fixedly connected to the flange 504 by bolts. It will be appreciated that other suitable means of fixedly connecting the crushing chain 502 to the flange 504 may be employed, including but not limited to welding, hinging, riveting, and the like. The length of the crushing chain 502 may be set according to the size of the inner space of the housing 2 of the vertical sludge crusher 1. That is, the horizontally extending length of the crushing chain 502 should be smaller than the inner radius of the housing 2 to avoid interference during operation. When the inner wall of the housing 2 of the vertical sludge crusher 1 is provided with the mud guard device 6, the length of the crushing chain 502 extending horizontally outward with the rotation shaft 501 as the center should be smaller than the distance from the mud guard to the rotation shaft 501 in the mud guard device 6 to avoid interference in the operation process.

in the illustrated embodiment, three crushing chains 502 are attached to each flange 503, but it is to be appreciated that this is merely an example. More or fewer crushing chains 502 may be provided on each flange 504, as desired. For example, different crushing chains 502, for example, different numbers and/or lengths of crushing chains, may be selected according to the size of the crusher, the application, the properties of the sludge (e.g., the current sludge state, the sludge cohesiveness, the water content, etc.), the requirements for sludge particles (e.g., the size of the final sludge particles after crushing), and the throughput. Furthermore, each link of the crushing chain 502 may also have a different shape and/or size, e.g. the individual links may also have different lengths and/or widths in order to achieve the desired crushing effect.

Additionally, it will be further appreciated that the crushing members may take other forms including, but not limited to, for example, rods, bars, tubes, square tubes, blades, cutters, blades, etc. fixedly attached at one end to the rotating shaft 501 and extending radially outward therefrom. Further, it is easily understood that these crushing members may be used in combination, for example, a rod or a bar may be provided with a cutter or a blade, or a crushing chain may be used together with a rod, a bar, a tube, a square tube, a blade, a cutter or a blade.

The vertical sludge crusher 1 further comprises a sludge-preventing net blocking device 6 for preventing sludge or dust from being stuck on the inner wall of the barrel body. Referring to fig. 3, the mud guard 6 comprises a mud guard 601 and at least one elastic connection means. The mud guard net 601 is disposed between the barrel 201 and the rotation shaft 501, adjacent to the inner wall of the barrel 201, and surrounds the crushing chain 502 connected to the rotation shaft 501. As shown in fig. 1 to 3, the mud-guard net 601 is a net ring formed by a plurality of ring-shaped bars and vertical bars. However, it is to be understood that this is merely an example. According to actual needs, the mud-proof blocking net 601 can also be filter cloth, reticular plastic products, metal products with holes, and the like, and the materials and the shapes of the net are not limited as long as the mud and the dust can be prevented from being adhered to the inner wall of the cylinder body. In the illustrated embodiment of the present application, the at least one resilient connecting means is a spring 602. However, it will be readily appreciated that in other possible embodiments, the resilient connection means may be any other suitable resilient member including, but not limited to, for example, a resilient cable, a flexible rod, etc. The spring 602 has one end connected to the mud guard net 601 and the other end connected to a ring 201a provided on the inner wall of the cylinder 201 so as to elastically hang the mud guard net 601 on the inner wall of the cylinder 201. In the embodiment shown in fig. 1, 2 and 3, the anti-mud mesh device 6 comprises twelve springs 602. The springs 602 are divided into three groups of four springs each. The sets of springs 602 are connected to the upper, middle and lower ends of the mud guard net 601, respectively. The four springs 602 in each set are evenly spaced from each other in the circumferential direction. It is to be understood, however, that this is merely one example of the invention and is not intended to limit the invention thereto. Any other number of springs 602 may be selected and/or any other suitable grouping of springs 602 may be used, as desired.

the mud guard net 601 can effectively intercept and buffer the sludge moving at high speed generated during the crushing process to prevent the sludge fragments from adhering to the inner wall of the shell. The inner wall of stack shell 201 and prevent that there is certain distance between mud fender net 601, can prevent from this that mud and dust from gluing on the inner wall of stack shell 201 at crushing in-process to need not the mud on the artifical clearance stack shell inner wall. It should be noted that the spring 602 not only plays a role of fixing and connecting the mud-guard net 601, but also when the mud is crushed, in the process of crushing the mud by the crushing chain 502, the mud impacts the mud-guard net 601 due to the action of inertia force, the spring 602 expands and contracts accordingly due to the elasticity of the spring, so as to drive the mud-guard net 601 to vibrate, so that the mud on the mud-guard net 601 is vibrated down, and the self-cleaning and automatic material-removing functions are realized.

In an embodiment of the invention, not shown, at least one vibrator may be further provided on the anti-mud net 601. When more sludge adheres to the mud-guard net 601, the vibrator may be activated to cause the mud-guard net 601 to vibrate so as to shake down the sludge in the mud-guard net 601 and then discharge it from the discharge hole 4. In another embodiment, a vibrator may be provided on the outer wall of the barrel 201 for vibrating the barrel 201 to shake down the sludge on the inner wall of the barrel 201. In addition, the vibration of the barrel 201 can also be transmitted to the mud-guard net 601 via the spring 602, and thus the mud-guard net 601 can also be caused to vibrate to shake down the mud in the mud-guard net 601.

Referring now to fig. 5, there is shown a method for crushing a sludge block using a vertical sludge crusher having a self-cleaning mud guard device according to the present invention, the method comprising the steps of: in step 701, the vertical sludge crusher 1 is started to rotate the rotating shaft 501, so as to drive the crushing chain 502 to rotate; in step 702, the sludge block to be crushed enters the barrel body 201 of the vertical sludge crusher 1 through the feed inlet 3, the sludge block entering the barrel body 201 is changed into small blocks or fragments or granules or powder under the impact of the crushing chain 502 rotating at high speed, so that the sludge is crushed, and the crushed fragments or granules or powder sludge is directly discharged from the discharge outlet 4 on the base 202 at the bottom of the shell 2; at step 703, stopping the conveyance of the sludge mass to be crushed; and, at step 704, the vertical sludge crusher 1 is stopped, thereby stopping the rotation of the rotating shaft 501. In addition, in another embodiment, the vibrator on the anti-mud-guard device 6 may be turned on to vibrate the anti-mud-guard 601 to shake off the mud on the anti-mud-guard 601. In yet another embodiment, a vibrator disposed on an outer wall of the barrel 201 may be turned on to vibrate the barrel 201 to shake down sludge on an inner wall of the barrel 201.

The vertical sludge crusher is suitable for crushing dewatered sludge cakes or dried sludge blocks or hard blocks. Due to the special property that the sludge is more viscous when being stirred or more viscous when being scraped, the sludge can be effectively prevented from being stirred in the crushing process through the sludge-preventing blocking net in the crusher, so that the characteristic that the sludge is more viscous when being stirred is overcome, and the phenomenon that the sludge or dust is more viscous when being stirred is prevented. Of course, the skilled person can apply the solution according to the invention to the crushing of sludges of different sludge qualities or different water contents.

While the present invention has been described above by way of some specific embodiments thereof, it is to be understood that the embodiments herein are to be considered as illustrative and not restrictive, and that the features of the embodiments disclosed herein can be configured and/or combined in any suitable configuration or combination. The invention is therefore not limited to the details provided herein, but may be embodied with various modifications and changes without departing from the basic idea of the invention, and all such modifications and changes are intended to fall within the scope of the invention.