A sludge drying device and system

Abstract

A sludge drying device and system, relating to the technical field of sludge treatment, comprising a base and a housing arranged on the base. Feed pipes and discharge pipes are respectively arranged on both sides of the top of the housing. An air inlet pipe is further arranged on the housing, and the air inlet pipe blows external heat sources into the interior of the housing. A rotor assembly is arranged inside the housing, and the rotor assembly rotates to break the sludge to be treated that enters the housing through the feed pipe. The broken sludge to be treated is dried under the action of the external heat source, and the treated sludge is discharged from the housing through the discharge pipe. This sludge drying device and system can improve the degree and efficiency of sludge drying.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and in particular, to a sludge drying device and system. Background Art

[0002] With the continuous development of socialization and urbanization in China, the generation amount of urban sewage is increasing continuously, the number of sewage treatment devices is also increasing accordingly, and the generation amount of sludge, the by-product after sewage treatment, is also getting larger and larger. Up to now, the annual output of sludge in China has exceeded 50 million tons, and among them, 70% of the sludge has not been properly treated. How to properly treat these continuously generated and increasingly large amounts of sludge has become an urgent problem to be solved in the field of environmental protection in China.

[0003] The sludge generated by most domestic sewage treatment plants generally has a moisture content of about 60%. Sludge dewatering is a key step in its treatment process, and the characteristic that sludge is difficult to be deeply dewatered has become a bottleneck problem restricting the harmless and resource-based treatment of sludge. Summary of the Invention

[0004] The purpose of the present invention is to provide a sludge drying device and system, which can improve the drying degree and drying efficiency of sludge.

[0005] The embodiments of the present invention are implemented as follows:

[0006] On the one hand of the embodiments of the present invention, a sludge drying device is provided, including a base and a housing arranged on the base. On both sides of the top of the housing, a feed pipe and a discharge pipe are respectively arranged. An air inlet pipe is also arranged on the housing, and the air inlet pipe blows external heat sources into the interior of the housing. A rotor assembly is arranged in the housing, and the rotor assembly rotates to break the sludge to be treated introduced into the housing through the feed pipe. The broken sludge to be treated is dried under the action of the external heat source, and the treated sludge is discharged from the housing through the discharge pipe. This sludge drying device can improve the drying degree and drying efficiency of sludge.

[0007] Optionally, the air inlet pipe is located at one end of the feed pipe away from the discharge pipe.

[0008] Optionally, a slag discharge pipe is further arranged on one side of the bottom of the housing, the slag discharge pipe is arranged opposite to the discharge pipe, the openings of the feed pipe and the discharge pipe face upward, and the opening of the slag discharge pipe faces downward.

[0009] Optionally, the rotor assembly includes a rotating shaft, a key, a plurality of first blade groups, a plurality of second blade groups, and a plurality of spacer rings. The rotating shaft is connected to the first blade group, the second blade group, and the spacer rings through the key respectively. Along the axial direction of the rotating shaft, the first blade groups and the second blade groups are arranged alternately. The spacer rings are arranged between adjacent first blade groups and second blade groups. The diameter of the blades of the first blade group is larger than that of the blades of the second blade group.

[0010] Optionally, a plurality of air guide rings and a plurality of wind blocking rings are further arranged in the housing. The air guide rings are arranged at the other end where the air inlet pipe is connected to the housing. The wind blocking rings are arranged on the inner wall of the housing. Along the circumferential direction of the rotating shaft, the wind blocking rings and the second blade groups are arranged opposite to and spaced from each other.

[0011] Optionally, along the circumferential direction of the rotating shaft, the first blade group includes a plurality of first blades, and along the circumferential direction of the rotating shaft, the second blade group includes a plurality of second blades.

[0012] Optionally, a bearing assembly is further arranged on the base. A pair of bearings of the bearing assembly are respectively located on both sides of the housing. Both ends of the rotating shaft extend out of the housing respectively, and both ends of the rotating shaft are respectively connected to a pair of bearings of the bearing assembly.

[0013] Optionally, two through holes are arranged on the housing. Both ends of the rotating shaft respectively pass through the through holes and extend out of the housing. The rotor assembly further includes a wear-resistant sleeve and a seal. The wear-resistant sleeve is sleeved outside the rotating shaft, and the wear-resistant sleeve is located between the rotating shaft and the through holes. The seal is arranged between the rotating shaft and the through holes.

[0014] Optionally, a driving assembly is further arranged on the base. The driving assembly is in transmission connection with the rotating shaft and is used to drive the rotor assembly to rotate.

[0015] On the other hand, an embodiment of the present invention provides a sludge drying system, including the above-mentioned sludge drying equipment. This sludge drying equipment can improve the drying degree and drying efficiency of sludge.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The sludge drying equipment includes a base and a housing disposed on the base. Feed pipes and discharge pipes are respectively disposed on both sides of the top of the housing. An air inlet pipe is also disposed on the housing, and the air inlet pipe blows external heat sources into the interior of the housing. A rotor assembly is disposed inside the housing, and the rotor assembly rotates to break the sludge to be treated that passes through the feed pipe into the housing. The broken sludge to be treated is dried under the action of the external heat source, and the treated sludge is discharged from the housing through the discharge pipe. The sludge drying equipment combines external heat sources such as waste heat resources of the kiln system with mechanical dispersion and drying. While the sludge to be treated is highly broken, high-temperature air flow is introduced to dry the broken sludge to be treated, so that a large amount of interstitial water and surface water are dissociated from the sludge to be treated, promoting the rapid seepage of the internal water of the sludge to be treated, and combining with the air medium to be carried out, thereby improving the degree and efficiency of sludge drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is one of the structural schematic diagrams of the sludge drying equipment provided by the embodiment of the present invention;

[0020] Figure 2 It is the second structural schematic diagram of the sludge drying equipment provided by the embodiment of the present invention.

[0021] Reference numerals: 100 - sludge drying equipment; 10 - base; 20 - housing; 21 - feed pipe; 22 - discharge pipe; 23 - air inlet pipe; 24 - slag discharge pipe; 25 - rotor assembly; 251 - rotating shaft; 252 - key; 253 - first blade group; 254 - second blade group; 255 - spacer ring; 256 - wear-resistant sleeve; 257 - seal; 26 - air guide ring; 27 - wind shield ring; 30 - bearing assembly; 40 - drive assembly; 41 - motor; 42 - coupling. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0023] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0024] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0026] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0027] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Please refer in combination to Figure 1 and Figure 2, this embodiment provides a sludge drying device 100, which includes a base 10 and a housing 20 disposed on the base 10. On both sides of the top of the housing 20, a feed pipe 21 and a discharge pipe 22 are respectively provided. An air inlet pipe 23 is also provided on the housing 20, and the air inlet pipe 23 blows external heat sources into the interior of the housing 20. A rotor assembly 25 is disposed inside the housing 20, and the rotor assembly 25 rotates to break the sludge to be treated that passes into the housing 20 through the feed pipe 21. The broken sludge to be treated is dried under the action of the external heat source, and the treated sludge is discharged from the housing 20 through the discharge pipe 22. This sludge drying device 100 can improve the drying degree and drying efficiency of the sludge.

[0029] It should be noted that, first, this sludge drying device 100 includes a base 10 and a housing 20 disposed on the base 10 to support and fix the housing 20 through the base 10. Figure 1 and Figure 2 The specific shapes of the base 10 and the housing 20 here only serve for illustrative purposes, and no specific limitations are imposed on the actual shapes of the base 10 and the housing 20. Those skilled in the art should be able to make reasonable selections and designs according to the actual situation.

[0030] Second, as Figure 1 and Figure 2 shown, a feed pipe 21 and a discharge pipe 22 are respectively provided on both sides of the top of the housing 20. The sludge to be treated passes into the housing 20 through the feed pipe 21, and the treated sludge is discharged outside the housing 20 through the discharge pipe 22. A rotor assembly 25 is disposed inside the housing 20, and the rotor assembly 25 rotates to break the sludge to be treated. At the same time, an air inlet pipe 23 is also provided on the housing 20, and the external heat source is blown into the interior of the housing 20 through the air inlet pipe 23. The broken sludge to be treated is dried under the action of the external heat source, so that a large amount of interstitial water and surface water are dissociated from the sludge to be treated, promoting the rapid seepage of the internal moisture of the sludge to be treated and being carried out in combination with the air medium, thereby improving the drying degree and drying efficiency of the sludge.

[0031] Exemplarily, the particle size of the sludge to be treated can be between 10 mm and 30 mm, and the water content is about 60%. Under the action of the rotor assembly 25, it is broken intensively. Due to factors such as different particle sizes, microcracks, densities, viscosities, and hardnesses of the broken sludge to be treated, they can collide irregularly with each other to form sludge fine powder with a particle size below 200 μm. At the same time, it is dried at a high temperature under the action of the external heat source, and the water content of the treated sludge can be reduced to below 30%.

[0032] It should be noted that, for the treatment requirements of different final moisture contents of the sludge to be treated, those skilled in the art should be able to adjust the hot air temperature introduced into the dryer, thereby adjusting the exhaust gas temperature discharged from the dryer, or adjusting the length of the pipeline discharging from the dryer, so as to be applicable to different actual situations.

[0033] Third, the external heat source can be the high-temperature waste gas in the kiln, such as the waste gas in the kiln at 150°C, 200°C, 230°C or 250°C, so as to reasonably utilize the waste heat resources of the kiln system, and then act on the sludge to be treated in combination with the principle of mechanical dispersion and drying, which is more in line with the green development concept of environmental protection and energy conservation.

[0034] As described above, the sludge drying device 100 includes a base 10 and a housing 20 disposed on the base 10. Feed pipes 21 and discharge pipes 22 are respectively disposed on both sides of the top of the housing 20. An air inlet pipe 23 is further disposed on the housing 20, and the air inlet pipe 23 blows the external heat source into the interior of the housing 20. A rotor assembly 25 is disposed in the housing 20, and the rotor assembly 25 rotates to break the sludge to be treated introduced into the housing 20 through the feed pipe 21. The broken sludge to be treated is dried under the action of the external heat source, and the treated sludge is discharged from the housing 20 through the discharge pipe 22. The sludge drying device 100 combines external heat sources such as waste heat resources of the kiln system with mechanical dispersion and drying. While the sludge to be treated is highly broken, high-temperature air flow is introduced to dry the broken sludge to be treated, so that a large amount of interstitial water and surface water are dissociated from the sludge to be treated, promoting the rapid seepage of the internal moisture of the sludge to be treated, and being combined with the air medium and carried out, thereby improving the drying degree and drying efficiency of the sludge.

[0035] As Figure 1 and Figure 2 shown, in this embodiment, the air inlet pipe 23 is located at one end of the feed pipe 21 away from the discharge pipe 22, so that the flow direction of the external heat source is the same as the flow direction of the sludge to be treated, or rather, the flow direction of the external heat source and the sludge to be treated is in a co-current manner, so that the sludge to be treated introduced into the housing 20 through the feed pipe 21 can move toward the direction close to the discharge pipe 22 under the action of the external heat source and the rotor assembly 25, and is discharged out of the housing 20 through the discharge pipe 22.

[0036] Considering that there may be impurities in the sludge to be treated that cannot be broken, therefore, as Figure 1 and Figure 2As shown, in this embodiment, a slag discharge pipe 24 is further provided on one side of the bottom of the housing 20. The slag discharge pipe 24 is arranged opposite to the discharge pipe 22. The opening of the feed pipe 21 faces upward, so that the sludge to be treated can be conveniently introduced into the housing 20. The axis of the air inlet pipe 23 is inclined with respect to the axis of the housing 20, and the opening of the air inlet pipe 23 faces upward, so that the external heat source can be conveniently introduced into the housing 20 and can carry the sludge to be treated and move it in the direction close to the discharge pipe 22. The opening of the discharge pipe 22 faces upward, and the opening of the slag discharge pipe 24 faces downward, so that the sludge fine powder after being crushed and dried can be discharged out of the housing 20 through the discharge pipe 22 under the action of the external heat source, and the impurities that cannot be crushed can be discharged out of the housing 20 through the slag discharge pipe 24 under the action of gravity.

[0037] Specifically, as Figure 2 shown, in this embodiment, the rotor assembly 25 includes a rotating shaft 251, a key 252, a plurality of first blade groups 253, a plurality of second blade groups 254, and a plurality of spacer rings 255. The rotating shaft 251 is connected to the first blade group 253, the second blade group 254, and the spacer ring 255 through the key 252 respectively. The rotating shaft 251 rotates to drive the first blade group 253 and the second blade group 254 to rotate through the key 252. Along the axial direction of the rotating shaft 251, the first blade group 253 and the second blade group 254 are arranged alternately. The spacer ring 255 is arranged between the adjacent first blade group 253 and the second blade group 254 to play a role of stably separating the alternately arranged first blade group 253 and the second blade group 254.

[0038] Among them, the diameter of the blades of the first blade group 253 is larger than the diameter of the blades of the second blade group 254. In other words, the distance between the blades of the first blade group 253 and the inner wall of the housing 20 is smaller than the distance between the blades of the second blade group 254 and the inner wall of the housing 20. In this way, the blades of the first blade group 253 can play a role in quickly crushing the sludge to be treated, and the blades of the second blade group 254 can play a role in assisting in crushing the sludge to be treated. At the same time, both the first blade group 253 and the second blade group 254 can play a role of high speed and strong disturbance on the external heat source, thereby improving the drying degree and drying efficiency of the crushed sludge to be treated.

[0039] As Figure 2As shown, in this embodiment, a plurality of air guide rings 26 and a plurality of wind blocking rings 27 are further provided inside the housing 20. Among them, the air guide ring 26 is provided at the other end where the air inlet pipe 23 is connected to the housing 20, so as to guide the external heat source to the annular space between the outer wall of the rotating shaft 251 and the inner wall of the housing 20. The wind blocking ring 27 is provided on the inner wall of the housing 20, and the wind blocking ring 27 and the second blade group 254 are arranged opposite to each other and at intervals along the circumferential direction of the rotating shaft 251, so as to cooperate with the second blade group 254 to assist in crushing the sludge to be treated, and at the same time can also block the flow speed of the external heat source and the sludge to be treated, so that the sludge to be treated with a higher water content can be in full contact with the external heat source, thereby improving the drying degree and drying efficiency of the sludge to be treated.

[0040] In this embodiment, along the circumferential direction of the rotating shaft 251, the first blade group 253 includes a plurality of first blades, and the plurality of first blades are evenly distributed. Along the circumferential direction of the rotating shaft 251, the second blade group 254 includes a plurality of second blades, and the plurality of second blades are evenly distributed. Exemplarily, the number of the first blades and the second blades are three, four, five or six, etc. It should be noted that the diameters and the numbers of the first blades and the second blades can be equal or unequal, and those skilled in the art should be able to make reasonable selections and designs according to the actual situation, and no specific limitations are made here.

[0041] As Figure 1 shown, in this embodiment, the sludge drying device 100 further includes a bearing assembly 30 provided on the base 10. A pair of bearings of the bearing assembly 30 are respectively located on both sides of the housing 20. The two ends of the rotating shaft 251 respectively extend out of the housing 20, and the two ends of the rotating shaft 251 are respectively connected to a pair of bearings of the bearing assembly 30, so as to support the rotating shaft 251 of the rotor assembly 25 through a pair of bearings of the bearing assembly 30.

[0042] As Figure 2 shown, in this embodiment, two through holes are provided on the housing 20. The two ends of the rotating shaft 251 respectively pass through the through holes and extend out of the housing 20. The rotor assembly 25 further includes a wear-resistant sleeve 256 and a seal 257. The wear-resistant sleeve 256 is sleeved outside the rotating shaft 251, and the wear-resistant sleeve 256 is located between the rotating shaft 251 and the through hole, so as to protect the rotating shaft 251 through the wear-resistant sleeve 256 and prevent the rotating shaft 251 from being worn. The seal 257 is provided between the rotating shaft 251 and the through hole, so as to seal the gap between the rotating shaft 251 and the through hole through the seal 257, thereby ensuring that the external heat source and the rotor assembly 25 inside the housing 20 can act on the sludge to be treated normally, and also preventing the sludge to be treated or the fine powder of the treated sludge from being discharged out of the housing 20 through the through hole.

[0043] As Figure 1As shown, in this embodiment, the sludge drying device 100 further includes a driving assembly 40 disposed on the base 10. The driving assembly 40 is in transmission connection with the rotating shaft 251 and is used to drive the rotor assembly 25 to rotate. Specifically, the driving assembly 40 includes a motor 41 and a coupling 42. The motor 41 is in transmission connection with one bearing of the bearing assembly 30 through the coupling 42. By way of example, the motor 41 is a variable-frequency motor and the coupling 42 is an elastic pin coupling, so as to drive the rotor assembly 25 to rotate and at the same time, the rotation speed of the rotor assembly 25 can be controlled according to the actual situation.

[0044] In this embodiment, the base 10 includes a base body and a housing 20 base, a bearing group base and a driving assembly 40 base disposed on the base 10 body, so as to respectively support and fix the housing 20, the bearing group and the driving assembly 40. The housing 20 includes a first sub-housing, a second sub-housing and a third sub-housing connected in sequence, which is convenient for installation and fixation.

[0045] This application also provides a sludge drying system. The sludge drying system provided in this embodiment includes the above-mentioned sludge drying device 100. Since the structure and beneficial effects of the sludge drying device 100 have been described in detail in the foregoing embodiments, they will not be elaborated herein.

[0046] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sludge drying device, characterized in that, It includes a base and a housing disposed on the base. On both sides of the top of the housing, a feed pipe and a discharge pipe are respectively arranged. An air inlet pipe is also arranged on the housing, and the air inlet pipe blows an external heat source into the interior of the housing. A rotor assembly is arranged inside the housing. The rotor assembly rotates to crush the sludge to be treated that passes into the housing through the feed pipe. The crushed sludge to be treated is dried under the action of the external heat source, and the treated sludge is discharged from the housing through the discharge pipe. The rotor assembly includes a rotating shaft, a key, a plurality of first blade groups, a plurality of second blade groups, and a plurality of spacer rings. The rotating shaft is connected to the first blade group, the second blade group, and the spacer rings respectively through the key. Along the axial direction of the rotating shaft, the first blade group and the second blade group are arranged alternately. The spacer rings are arranged between adjacent first blade groups and second blade groups. The diameter of the blades of the first blade group is larger than the diameter of the blades of the second blade group. A plurality of air guide rings and a plurality of wind baffle rings are also arranged inside the housing. The air guide rings are arranged at the other end where the air inlet pipe is connected to the housing. The wind baffle rings are arranged on the inner wall of the housing. Along the circumferential direction of the rotating shaft, the wind baffle rings and the second blade group are relatively and spaced apart. Two through holes are arranged on the housing. Both ends of the rotating shaft respectively pass through the through holes and extend out of the housing. The rotor assembly further includes a wear-resistant sleeve and a seal. The wear-resistant sleeve is sleeved outside the rotating shaft, and the wear-resistant sleeve is located between the rotating shaft and the through holes. The seal is arranged between the rotating shaft and the through holes.

2. The sludge drying equipment according to claim 1, characterized in that, The air inlet pipe is located at one end of the feed pipe away from the discharge pipe.

3. The sludge drying equipment according to claim 1, characterized in that, On one side of the bottom of the housing, a slag discharge pipe is further arranged. The slag discharge pipe is arranged opposite to the discharge pipe. The openings of the feed pipe and the discharge pipe face upward, and the opening of the slag discharge pipe faces downward.

4. The sludge drying equipment according to claim 1, characterized in that, Along the circumferential direction of the rotating shaft, the first blade group includes a plurality of first blades, and along the circumferential direction of the rotating shaft, the second blade group includes a plurality of second blades.

5. The sludge drying equipment according to claim 1, characterized in that, It further includes a bearing assembly arranged on the base. A pair of bearings of the bearing assembly are respectively located on both sides of the housing. Both ends of the rotating shaft respectively extend out of the housing, and both ends of the rotating shaft are respectively connected to a pair of bearings of the bearing assembly.

6. The sludge drying equipment according to claim 5, wherein, It further includes a drive assembly arranged on the base. The drive assembly is in transmission connection with the rotating shaft and is used to drive the rotor assembly to rotate.

7. A sludge drying system, characterized in that, It includes the sludge drying equipment according to any one of claims 1-6.

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