Sludge granulation screening device

Abstract

The invention relates to a sludge granulation screening device, and belongs to the technical field of sludge treatment, the sludge granulation screening device comprises a shell, and a sludge-water separation module and a sludge concentration module which are sequentially arranged in the shell from top to bottom and are communicated with each other, and sludge circulation channels are formed in the two sides of the sludge-water separation module; the sludge circulation channel comprises a plurality of ascending channels and a plurality of backflow channels, the sludge concentration module forms a sludge sliding channel below the sludge-water separation module, and the sludge sliding channel is collected from top to bottom; the sewage treatment device further comprises an aeration module, the aeration module comprises a plurality of aeration valves, the plurality of aeration valves are respectively arranged below the plurality of ascending channels and at the bottom of the shell, and the aeration module is used for blowing air to the sludge circulating channel above; the mud-water separation module is used for separating water and sludge and conveying the sludge to a shell floor; the aeration module is used for conveying the sludge at the bottom of the shell to the top of the mud-water separation module through an ascending channel; the screening device can be matched with a continuous flow process and is good in screening effect.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a sludge granulation and screening device. Background Art

[0002] In sewage treatment, due to the different properties of the liquid and solid, different treatment methods need to be adopted respectively. Therefore, it is necessary to separate the liquid and solid and collect the solid sludge in the sewage.

[0003] The general decentralized collection scheme is more difficult, and the wastewater treatment is not up to standard. For this reason, an aerobic granular sludge reactor is usually used to treat the sewage. However, the traditional aerobic granular sludge reactor has defects such as difficulty in starting, high energy consumption, large area, and difficulty in manufacturing, which limits and affects its application in sewage treatment. For this reason, Chinese patent CN213623450U discloses a polyaluminum chloride enhanced aerobic granular sludge inclined tube reactor, including an aerobic granular sludge main reaction zone, a mud hopper and a polyaluminum chloride storage tank. The aerobic granular sludge main reaction zone is a hollow cylinder, and a perforated plate is provided at the bottom, and a mud hopper is connected to the lower plate surface of the perforated plate. Two groups of honeycomb inclined tubes are placed in the aerobic granular sludge main reaction zone, and the inclined tubes are placed in opposite directions. The reactor of the utility model adopts the operation mode of SBR. During one reaction cycle, sewage enters the aerobic granular sludge main reaction zone from the top, and the polyaluminium chloride solution in the polyaluminium chloride storage tank is discharged. After the anoxic and aeration process, the sewage is discharged after static sedimentation. The device has a short start-up cycle, strong domestic sewage treatment capacity and high stability, can be widely used in various types of decentralized sewage treatment, can be scaled up and manufactured in proportion, and has good promotion significance.

[0004] However, in the above structure, the step of achieving granulation involves the sewage being left standing for 0.5 to 2.5 hours in the aerobic granular sludge main reaction zone 1, while in the existing sewage treatment plants' mainstream process using continuous flow, sewage is continuously injected and products are continuously output. Therefore, the above structure and method of use involving long-term standing are difficult to adapt to the existing sewage treatment plants' mainstream process using continuous flow. Therefore, there is a need for a sludge granulation screening device that can adapt to the continuous flow process and has a good screening effect. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a sludge granulation screening device, which has the characteristics of being adaptable to continuous flow process and having good screening effect.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A sludge granulation and screening device comprises a shell and a sludge-water separation module and a sludge concentration module which are sequentially arranged from top to bottom and are interconnected in the shell, sludge circulation channels are formed on both sides of the sludge-water separation module, the sludge circulation channels include a plurality of ascending channels and a plurality of reflux channels, the sludge concentration module forms a sludge sliding channel below the sludge-water separation module, and the sludge sliding channel converges from top to bottom; It also includes an aeration module, the aeration module includes a plurality of aeration valves, the plurality of aeration valves are respectively arranged below the plurality of ascending channels and at the bottom of the housing, and the aeration module is used to blow air into the sludge circulation channel above; The mud-water separation module is used to separate water and sludge and transfer the sludge to the sludge concentration module, the sludge concentration module is used to concentrate the sludge at the bottom of the shell, and the aeration module is used to send the sludge at the bottom of the shell to the top of the mud-water separation module through the ascending channel.

[0007] As a preferred technical solution of the present invention, the mud-water separation module includes a packing assembly, the packing assembly includes a plurality of special-shaped quadrilateral composite plates, a plurality of pipes are formed in any of the special-shaped quadrilateral composite plates, the packing assembly is composed of a combination of a plurality of special-shaped quadrilateral composite plates, special-shaped quadrilateral composite plates are arranged on both sides of the packing assembly, the special-shaped quadrilateral composite plates on both sides of the packing assembly constitute a sludge circulation channel, and the packing assembly and the plurality of pipes in the special-shaped quadrilateral composite plates in the sludge circulation channel are arranged perpendicular to the ground.

[0008] As a preferred technical solution of the present invention, any of the special-shaped quadrilateral composite panels includes a rectangular steel plate with folded edges on two opposite sides, the rectangular steel plate and the folded edges on both sides form a door-shaped space, a honeycomb panel is arranged in the door-shaped space, and the axial direction of the honeycomb panel is parallel to the folded edges.

[0009] As a preferred technical solution of the present invention, it also includes a control module, which is electrically connected to the aeration module and is used to adjust the aeration power of several aeration valves.

[0010] As a preferred technical solution of the present invention, the control module is electrically connected to a sludge weight sensor, which is used to detect the amount of sludge in the shell and upload it to the control module. The control module determines whether the sludge amount exceeds a threshold value, and increases the aeration power when it exceeds the threshold value, and reduces the aeration power when it is lower than the threshold value.

[0011] As a preferred technical solution of the present invention, the sludge weight sensor is used to detect the sludge amount m in the shell and upload it to the control module, and the control module adjusts the aeration power of the aeration valve to P, where P=m / m0×c, where m0 and c are pre-input constants.

[0012] As a preferred technical solution of the present invention, it also includes a control panel, and the control panel is used to input the values ​​of c and m0.

[0013] The beneficial effects of the present invention are: (1) By setting the sludge circulation channel on both sides of the mud-water separation module, setting the sludge concentration module at the bottom of the mud-water separation module, and setting aeration valves at the bottom of the shell and below the rising channel in the sludge circulation channel, the sewage can continuously flow into the mud-water separation module, and the flocculent sludge therein continuously sinks and is continuously sent to the reciprocating cycle grinding. The polished sludge is separated from the reciprocating cycle grinding process and sinks to the bottom of the pool. There is no need to pause at any step in the middle, so that real-time input and output are realized, and the continuous flow operation of sludge granulation grinding is completed; (2) By setting up special-shaped quadrilateral composite plates and making the special-shaped quadrilateral composite plates form mud-water separation modules and sludge circulation channels, the mud-water separation modules and sludge circulation channels are modularized, so that the mud-water separation modules and sludge circulation channels can be prefabricated in a standardized manner in a processing plant, thereby reducing the difficulty of installation, the overall cost and the complexity of the structure; (3) By setting up a sludge weight sensor to detect the amount of sludge in the shell and upload it to the control module, the control module increases the aeration power when the sludge amount exceeds the threshold, and reduces the aeration power when the sludge amount is lower than the threshold. The aeration power is increased when there is more sludge to ensure the grinding effect, and the aeration power is reduced when there is less sludge to reduce power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of a single rectangular steel plate and folded edge; Figure 2 It is a schematic diagram of the top view structure of a single special-shaped quadrilateral composite plate; Figure 3 It is a schematic diagram of the top view of the structure of a single packing component; Figure 4 It is a top view structural diagram of the mud-water separation module and the sludge circulation channel; Figure 5 A side cross-sectional schematic diagram of the overall structure of the present invention.

[0016] Description of main component symbols: In the figure: 1. Shell; 2. Mud-water separation module; 21. Filling assembly; 3. Sludge concentration module; 4. Sludge circulation channel; 41. Rising channel; 42. Return channel; 5. Special-shaped quadrilateral composite plate; 51. Rectangular steel plate; 52. Folded edge; 53. Honeycomb plate; 54. Screw interface; 6. Aeration valve. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0018] See also Figure 1-5 A sludge granulation and screening device comprises a shell 1 and a mud-water separation module 2 and a sludge concentration module 3 which are sequentially arranged from top to bottom and are interconnected in the shell 1, a sludge circulation channel 4 is formed on both sides of the mud-water separation module 2, the sludge circulation channel 4 comprises a plurality of ascending channels 41 and a plurality of reflux channels 42, and a sludge sliding channel is formed under the mud-water separation module 2 in the sludge concentration module 3, and the sludge sliding channel converges from top to bottom; Specifically, the housing 1 is a hollow quadrangular prism structure with an open top and a long side perpendicular to the ground. A mud-water separation module 2 is arranged in the central control quadrangular prism, and a sludge concentration module 3 is arranged below the mud-water separation module 2. The mud-water separation module 2 and the sludge circulation channels 4 on both sides divide the space inside the housing 1 into two parts. The two parts of the space inside the housing 1 are connected only through the mud-water separation module 2 and the sludge circulation channel 4. The mud-water separation module 2 is in the shape of a quadrangular prism as a whole, and the bottom surface of the mud-water separation module 2 is rectangular. The mud-water separation module 2 includes a plurality of honeycomb tubes, and the plurality of honeycomb tubes are arranged to be axially perpendicular to the ground; The sludge circulation channel 4 includes a plurality of ascending channels 41 and a plurality of reflux channels 42, and the ascending channels 41 and the reflux channels 42 are alternately arranged; At this time, the objects in the upper space of the housing 1 can enter the lower space of the housing 1 through the honeycomb tubes in the mud-water separation module 2 and the honeycomb tubes in the sludge circulation channel 4 under the action of gravity; The sludge concentration module 3 includes two baffles, the upper edges of which are connected to the two sides of the rectangular bottom surface of the mud-water separation module 2 respectively, and the lower edges of the two baffles are closer to the axis of the shell 1 than the upper edges. At this time, the two baffles form a channel with a wide top and a narrow bottom at the bottom of the mud-water separation module 2; When in use, the mud-water mixture enters the upper part of the housing 1, and the sludge therein passes through the honeycomb tube in the mud-water separation module 2 and the honeycomb tube in the sludge circulation channel 4 under the action of gravity and enters the sludge concentration module 3 at the lower part of the mud-water separation module 2, and is gathered by the channel with a wide top and a narrow bottom and then enters the bottom of the housing 1, completing the separation of sludge and sewage; In the above process for the treatment of sludge, the sludge in the natural state is mostly a flocculent structure, which is relatively loose, has a low density, and a slow sedimentation speed. The sludge needs to be polished, and the general polishing scheme is to pass a batch of sludge and sewage mixture, stop passing, polish, discharge the sludge and pass the next batch of sewage, which cannot adapt to the continuous flow sewage treatment mode. For this reason, it also includes an aeration module, and the aeration module includes a plurality of aeration valves 6, and the plurality of aeration valves 6 are respectively arranged below the plurality of ascending channels 41 and at the bottom of the housing 1, and the aeration module is used to blow air to the sludge circulation channel 4 above; Specifically, the two groups of sludge circulation channels 4 located on both sides of the mud-water separation module 2 include a plurality of ascending channels 41 and a plurality of return channels 42. Since each group of sludge circulation channels 4 is located in the accommodation space formed between the two sides of the mud-water separation module 2 and the inner walls of the two sides of the shell 1, and the accommodation space is in the shape of a quadrangular prism, the long side of the rectangular transverse cross-section of the quadrangular prism accommodation space is longer and the short side is shorter, for the same group of sludge circulation channels 4, the plurality of ascending channels 41 and the return channels 42 are alternately arranged along the long side of the transverse cross-section of the quadrangular prism accommodation space, and the channels are closely attached to the adjacent channels. At this time, for both sides of the mud-water separation module 2, a plurality of channels arranged in a transverse array are formed respectively, forming two groups of sludge circulation channels 4; It also includes an aeration module, which includes a plurality of aeration valves 6, which are respectively arranged below the plurality of ascending channels 41 and at the bottom of the housing 1, and the aeration module is used to blow air into the sludge circulation channel 4 above; After the sludge enters the bottom of the shell 1, the flocculent sludge moves upward under the blowing of the aeration valve 6 arranged at the bottom of the shell 1. Since the structure of the sludge concentration module 3 is two inclined baffles, and the upper edges of the two baffles are respectively connected to the two sides of the rectangular bottom surface of the mud-water separation module 2, the upper edges of the two baffles are close to the bottom of the sludge circulation channel 4 located on both sides of the mud-water separation module 2. Therefore, after the sludge moves upward, most of the sludge collides with the baffle of the sludge concentration module 3, and then moves upward along the inclined baffle to enter the bottom of the sludge circulation channel 4. Then, under the action of the bubbles ejected by the several aeration valves 6 arranged at the bottom of the ascending channel 41 in the sludge circulation channel 4, the sludge continues to rise until it rises to the liquid level at the upper end of the sludge circulation channel 4. When the sludge rises to the liquid surface at the upper end of the sludge circulation channel 4, the bubbles leave the liquid surface and enter the air, and the sludge overflows to the surroundings. Since the plurality of rising channels 41 and the reflux channels 42 are alternately arranged and closely attached to the adjacent channels, the overflowed sludge enters the surrounding reflux channels 42, and flows back to the bottom of the housing 1 or the bottom of the rising channel 41 under the action of gravity, and then re-enters the rising channel 41 under the action of the aeration valve 6 at the bottom of the housing 1 or the bottom of the rising channel 41, and flows in a reciprocating cycle. In the process of reciprocating circulation, the flocculent sludge is reciprocatingly polished under the action of the force of the bubbles. The polished granular sludge has a higher density than the flocculent sludge and is no longer blown up by the bubbles, thus completing the screening of flocculent sludge and granular sludge. At the same time, according to the above structure, sewage with flocculent sludge can flow into the mud-water separation module 2 in real time, and the sludge therein can be separated from the water and sink in real time, and at any time, under the action of the aeration valve 6, it can be sent into the sludge circulation channel 4 to be reciprocatingly polished, and the reciprocating polishing area does not interfere with the mud-water separation module 2; Therefore, in actual use, sewage continuously flows into the mud-water separation module 2, the flocculent sludge therein continuously sinks and is continuously sent to the reciprocating cycle grinding, and the polished sludge is separated from the reciprocating cycle grinding process and sinks to the bottom of the pool, and there is no need to pause in any of the intermediate steps, so that real-time input and output are realized, and the continuous flow operation of sludge granulation grinding is completed; By arranging the sludge circulation channel 4 on both sides of the mud-water separation module 2, arranging the sludge concentration module 3 at the bottom of the mud-water separation module 2, and arranging the aeration valve 6 at the bottom of the shell 1 and below the rising channel 41 in the sludge circulation channel 4, the sewage can continuously flow into the mud-water separation module 2, and the flocculent sludge therein continuously sinks and is continuously sent to the reciprocating cycle grinding. The polished sludge is separated from the reciprocating cycle grinding process and sinks to the bottom of the pool. There is no need to pause at any step in the middle, so real-time input and output are realized, and the continuous flow operation of sludge granulation grinding is completed.

[0019] For the mud-water separation module 2, specifically, the mud-water separation module 2 includes a packing assembly 21, the packing assembly 21 includes a plurality of special-shaped quadrilateral composite plates 5, any of the special-shaped quadrilateral composite plates 5 is formed with a plurality of pipes, the packing assembly 21 is composed of a plurality of special-shaped quadrilateral composite plates 5, special-shaped quadrilateral composite plates 5 are arranged on both sides of the packing assembly 21, the special-shaped quadrilateral composite plates 5 on both sides of the packing assembly 21 constitute a sludge circulation channel 4, and the packing assembly 21 and the plurality of pipes in the special-shaped quadrilateral composite plates 5 in the sludge circulation channel 4 are arranged perpendicular to the ground; For each irregular quadrilateral composite panel 5, the irregular quadrilateral composite panel 5 includes a rectangular steel plate 51 with folded edges 52 on two opposite sides, the rectangular steel plate 51 and the folded edges 52 on both sides form a door-shaped space, a honeycomb panel 53 is arranged in the door-shaped space, the axial direction of the honeycomb panel 53 is parallel to the folded edge 52, a screw interface 54 is arranged on the folded edge 52, the screw interface 54 is used to screw in a bolt, and a plurality of irregular quadrilateral composite panels 5 can be detachably connected through the screw interface 54; In the present embodiment, for each special-shaped quadrilateral composite plate 5, the rectangular steel plate 51 is a rectangle with a similar length and width, two folding edges 52 are arranged on the long side of the rectangular steel plate 51, the long sides of the two folding edges 52 are equal to the long sides of the rectangular steel plate 51, and the short sides of the two folding edges 52 are 1 / 10 to 1 / 5 of the long sides. After the long sides of the two folding edges 52 are connected to the corresponding long sides of the rectangular steel plate 51, the rectangular steel plate 51 and the folding edges 52 on both sides form a door-shaped space, and then a honeycomb panel 53 is arranged in the door-shaped space. The honeycomb panel 53 is composed of a number of mutually embedded regular hexagonal prism tubes composed of a number of steel plates. The honeycomb panel 53 and the rectangular steel plate 51 and the folding edges 52 on both sides together form a number of channels, and each special-shaped quadrilateral composite plate 5 constitutes a quadrangular prism with a relatively flat cross-section as a whole, or a plate-shaped structure with a relatively thick thickness. Therefore, the special-shaped quadrilateral composite plates 5 of a plurality of plate-shaped structures can be stacked along the short sides of the folding edges 52, similar to the stacking of a plurality of plate-shaped structures; When a plurality of irregular quadrilateral composite panels 5 are stacked along the short sides of the folded edges 52, a packing assembly 21 of a cubic structure is formed. A plurality of honeycomb panels 53 in each irregular quadrilateral composite panel 5 in the cubic packing assembly 21 constitute a plurality of pipes in the cubic structure. When the packing assembly 21 is arranged in the housing 1 in a manner that the pipes are perpendicular to the ground, the honeycomb pipes are arranged in the housing 1 to complete the function of mud-water separation. In this embodiment, the mud-water separation module 2 includes two packing components 21, and the two packing components 21 are respectively provided with an additional irregular quadrilateral composite plate 5 as a sludge circulation channel 4. The rectangular steel plate 51 of the irregular quadrilateral composite plate 5 constituting the sludge circulation channel 4 is perpendicular to the rectangular steel plate 51 of the irregular quadrilateral composite plate 5 constituting the packing component 21. After the packing component 21 and the sludge circulation channel 4 are assembled, the cross section perpendicular to the ground direction is consistent with the cross section shape of the housing 1; By arranging the special-shaped quadrilateral composite plate 5 and making the special-shaped quadrilateral composite plate 5 form the mud-water separation module 2 and the sludge circulation channel 4, the mud-water separation module 2 and the sludge circulation channel 4 are modularized, so that the mud-water separation module 2 and the sludge circulation channel 4 can be prefabricated in a standardized manner in a processing plant, thereby reducing the difficulty of installation, the overall cost and the complexity of the structure.

[0020] In the above process, if welding is used to connect several special-shaped quadrilateral composite panels 5, the installation difficulty and time consumption are relatively large. Therefore, a screw interface 54 is provided on any special-shaped quadrilateral composite panel 5, and the screw interface 54 is used to screw in a bolt, and several special-shaped quadrilateral composite panels 5 are detachably connected through the screw interface 54; In the above structure, in order to improve the control convenience of the aeration valve 6, a control module is also included, the control module is electrically connected to the aeration module, and the control module is used to adjust the aeration power of the plurality of aeration valves 6; specifically, the control module controls the plurality of air valves respectively, and the plurality of air valves are connected to the plurality of aeration valves 6 in a one-to-one correspondence, and the control module controls the aeration power of the plurality of aeration valves 6 by controlling the air outlet power of the air valves; When the housing 1 contains different amounts of sludge, different aeration powers are required. When the sludge is more, a larger aeration power is required to make more sludge move along the ascending channel 41 to ensure the grinding effect. When the sludge is less, a larger power is not required to avoid excessive energy consumption. For this reason, the control module is electrically connected to a sludge weight sensor, which is used to detect the amount of sludge in the housing 1 and upload it to the control module. The control module determines whether the sludge amount exceeds a threshold value, and increases the aeration power when it exceeds the threshold value, and reduces the aeration power when it is lower than the threshold value. Specifically, the sludge weight sensor is used to detect the amount of sludge m in the housing 1 and upload it to the control module, and the control module adjusts the aeration power of the aeration valve 6 to P, where P = m / m0×c, where m0 and c are pre-input constants; When the sludge weight m is large, it means that the aeration power needs to be increased. At this time, the value of P=m / m0×c is large. When the control module instructs the aeration power of the aeration valve 6 to be adjusted to P, the aeration power is increased when there is more sludge to ensure the grinding effect; When the sludge weight m is small, it means that the aeration power needs to be reduced. At this time, the value of P=m / m0×c is small. When the control module instructs the aeration power of the aeration valve 6 to be adjusted to P, the aeration power is reduced when there is less sludge, thereby reducing power consumption. By setting a sludge weight sensor to detect the sludge amount in the shell 1 and upload it to the control module, the control module increases the aeration power when the sludge amount exceeds the threshold, and reduces the aeration power when the sludge amount is lower than the threshold. The aeration power is increased when there is more sludge to ensure the polishing effect, and the aeration power is reduced when there is less sludge to reduce power consumption.

[0021] To facilitate the input of the values ​​of c and m0, a control panel is also included, and the control panel is used to input the values ​​of c and m0.

[0022] In some cases, the flocculent sludge entering the shell is unevenly distributed. Imagine a situation where the flocculent sludge is mostly concentrated on one side of the shell, and the aeration power on the side where the sludge is concentrated is likely to be insufficient. For this purpose, a weight distribution sensor is electrically connected to the control module. The weight distribution sensor is used to detect the difference in sludge weight between the left and right sides of the shell 1 and upload it to the control module. The control module increases the aeration power on the side with higher sludge weight when the difference is higher than a threshold value. Specifically, the control module places a plurality of aeration valves 6 along one of the sides of the axial rectangular cross-section of the shell 1, and records the plurality of aeration valves 6 as left aeration valves 6 and right aeration valves 6. The weight distribution sensor includes a plurality of sludge weight sensors electrically connected to the control module. The plurality of sludge weight sensors synchronously detect the sludge weight once per second and upload a plurality of sludge data to the control module. The control module groups the plurality of weight sensors in the weight distribution sensor in advance, and divides the plurality of weight sensors on the same side as the left aeration valve 6 into the left side and the right side into the right side. The control module calculates the average weight uploaded by the plurality of weight sensors on the left side, which is recorded as the left side weight, and the average weight uploaded by the plurality of weight sensors on the right side, which is recorded as the right side weight. Then, it is determined whether the difference in weight on both sides exceeds a threshold value. When the threshold value is exceeded, the control module instructs the aeration valve 6 corresponding to the relatively higher side of the left weight and the right weight to increase the power. Optionally, the control module instructs the aeration power on the side with higher sludge weight to be increased by A1 times, where A1=(1+(|ML-MR|)), ML is the weight on the left side, and MR is the weight on the right side.

[0023] The working principle and use process of the present invention: When in use, the mud-water mixture enters the upper part of the housing 1, and the sludge therein passes through the honeycomb tube in the mud-water separation module 2 and the honeycomb tube in the sludge circulation channel 4 under the action of gravity and enters the sludge concentration module 3 at the lower part of the mud-water separation module 2, and is gathered by the channel with a wide top and a narrow bottom and then enters the bottom of the housing 1, completing the separation of sludge and sewage; After the sludge enters the bottom of the shell 1, the flocculent sludge moves upward under the blowing of the aeration valve 6 arranged at the bottom of the shell 1. Since the structure of the sludge concentration module 3 is two inclined baffles, and the upper edges of the two baffles are respectively connected to the two sides of the rectangular bottom surface of the mud-water separation module 2, the upper edges of the two baffles are close to the bottom of the sludge circulation channel 4 located on both sides of the mud-water separation module 2. Therefore, after the sludge moves upward, most of the sludge collides with the baffle of the sludge concentration module 3, and then moves upward along the inclined baffle to enter the bottom of the sludge circulation channel 4. Then, under the action of the bubbles sprayed by the several aeration valves 6 arranged at the bottom of the rising channel 41 in the sludge circulation channel 4, it continues to rise until it rises to the liquid level at the upper end of the sludge circulation channel 4. When the sludge rises to the liquid surface at the upper end of the sludge circulation channel 4, the bubbles leave the liquid surface and enter the air, and the sludge overflows to the surroundings. Since a number of rising channels 41 and reflux channels 42 are alternately arranged and closely attached to adjacent channels, the overflowed sludge enters the surrounding reflux channels 42, and flows back to the bottom of the outer shell 1 or the bottom of the rising channel 41 under the action of gravity, and then re-enters the rising channel 41 under the action of the aeration valve 6 at the bottom of the outer shell 1 or the bottom of the rising channel 41, and flows in a reciprocating cycle.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A sludge granulation and screening device, characterized in that: It comprises a shell and a mud-water separation module and a sludge concentration module which are sequentially arranged from top to bottom and are interconnected in the shell, wherein sludge circulation channels are formed on both sides of the mud-water separation module, and the sludge circulation channels include a plurality of ascending channels and a plurality of reflux channels, and the sludge concentration module is provided with a sludge sliding channel below the mud-water separation module, and the sludge sliding channel converges from top to bottom; It also includes an aeration module, the aeration module includes a plurality of aeration valves, the plurality of aeration valves are respectively arranged below the plurality of ascending channels and at the bottom of the housing, and the aeration module is used to blow air into the sludge circulation channel above; The mud-water separation module is used to separate water and sludge and transfer the sludge to the sludge thickening module. The mud-water separation module includes a plurality of honeycomb tubes. The sludge thickening module is used to make the sludge pass through the honeycomb tubes in the mud-water separation module by gravity, and concentrate the sludge in the sludge thickening module at the bottom of the mud-water separation module. The sludge thickening module includes two baffles, and the two baffles form a channel that is wide at the top and narrow at the bottom at the bottom of the mud-water separation module. The sludge thickening module is used to concentrate the sludge and discharge it into the bottom of the outer shell. The aeration module is used to send the sludge at the bottom of the outer shell to the top of the mud-water separation module through the rising channel, so that the ungranulated sludge re-enters the reflux channel after rising in the plurality of rising channels, and then re-enters the plurality of rising channels. The sludge circulation channel cooperates with the aeration module to allow the ungranulated sludge to continue to move in the sludge circulation channel.

2. A sludge granulation and screening device according to claim 1, characterized in that: The mud-water separation module includes a packing assembly, which includes a plurality of special-shaped quadrilateral composite plates, and a plurality of pipes are formed in any of the special-shaped quadrilateral composite plates. The packing assembly is composed of a plurality of special-shaped quadrilateral composite plates, and special-shaped quadrilateral composite plates are arranged on both sides of the packing assembly. The special-shaped quadrilateral composite plates on both sides of the packing assembly constitute a sludge circulation channel, and the packing assembly and the plurality of pipes in the special-shaped quadrilateral composite plates in the sludge circulation channel are arranged perpendicular to the ground.

3. A sludge granulation and screening device according to claim 2, characterized in that: Any of the irregular quadrilateral composite panels comprises a rectangular steel plate with folded edges on two opposite sides, the rectangular steel plate and the folded edges on both sides form a door-shaped space, a honeycomb panel is arranged in the door-shaped space, and the axial direction of the honeycomb panel is parallel to the folded edges.

4. The sludge granulation and screening device according to claim 1, characterized in that: It also includes a control module, which is electrically connected to the aeration module and is used to adjust the aeration power of several aeration valves.

5. The sludge granulation and screening device according to claim 4, characterized in that: The control module is electrically connected to a sludge weight sensor, which is used to detect the amount of sludge in the shell and upload it to the control module. The control module determines whether the sludge amount exceeds a threshold, and increases the aeration power when it exceeds the threshold, and reduces the aeration power when it is below the threshold.

6. The sludge granulation and screening device according to claim 5, characterized in that: The sludge weight sensor is used to detect the sludge amount m in the housing and upload it to the control module, and the control module adjusts the aeration power of the aeration valve to P, where P=m / m0×c, where m0 and c are pre-input constants.

7. The sludge granulation and screening device according to claim 4, characterized in that: Also included is a control panel electrically connected to the control module, wherein the control panel is used to input values ​​of c and m0.

8. The sludge granulation and screening device according to claim 4, characterized in that: It also includes a weight distribution sensor electrically connected to the control module, the weight distribution sensor is used to detect the difference in sludge weight between the left and right sides of the housing and upload it to the control module. When the difference is higher than a threshold, the control module increases the aeration power on the side with higher sludge weight.

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