Sludge solar drying system and sludge drying method

Abstract

The present application relates to sludge drying treatment technical field, and its purpose is to provide a kind of sludge solar drying system and sludge drying method.This sludge solar drying system can automatically distribute and collect material, degree of automation is high, work efficiency is high, above-mentioned sludge solar drying system includes: the mud inlet mechanism, the turning and transporting mechanism and the mud outlet mechanism in turn along sludge drying treatment direction;Mud inlet mechanism includes mud inlet end and mud laying assembly, and mud laying assembly is used to lay the wet sludge discharged by mud inlet end;Turning and transporting mechanism is arranged in the downstream of mud inlet mechanism, and turning and transporting mechanism is used to turn and transport wet sludge along sludge drying treatment direction, and after drying sludge, dry sludge is transported to mud outlet mechanism;Mud outlet mechanism is arranged in the downstream of turning and transporting mechanism, and mud outlet mechanism is used to discharge dry sludge.The present application solves the problem that sludge solar drying system in prior art needs manual distribution and collection, time-consuming and laborious, degree of automation is low, work efficiency is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge drying treatment, in particular to a sludge solar drying system and a sludge drying method. BACKGROUND

[0002] The sludge solar drying technology is a common sludge drying method, which reduces the water content of sludge, eliminates the odor and pathogens of sludge, and improves the heat value of sludge through the irradiation of sunlight, and is an investment small and operation cost low sludge drying technology for sludge reduction, harmlessness and resource utilization.

[0003] The existing sludge solar drying system generally needs manual distribution in a specified area when performing sludge drying work, that is, the wet sludge to be dried is evenly laid in the area by the staff, and then the turning machine reciprocates on the track to continuously turn and throw the sludge in the area to increase the evaporation area of the sludge, so that the sludge is fully dried. After a period of time, the sludge is dried, and then the sludge is uniformly collected by manual work and subsequent treatment. Since the existing sludge solar drying system needs manual distribution and sludge collection, it is time-consuming and labor-intensive, has low automation degree and low work efficiency. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defects of the existing sludge solar drying system, that is, the need for manual distribution and collection, time-consuming and labor-intensive, low automation degree and low work efficiency, so as to provide a sludge solar drying system and a sludge drying method which can automatically distribute and collect, have high automation degree and high work efficiency.

[0005] To this end, the present application provides a sludge solar drying system, comprising: an inlet mechanism, a turning and transporting mechanism and an outlet mechanism which are sequentially arranged along a sludge drying treatment direction,

[0006] The inlet mechanism comprises an inlet end and a sludge laying assembly, and the sludge laying assembly is used for laying the wet sludge discharged by the inlet end;

[0007] The turning and transporting mechanism is arranged downstream of the inlet mechanism, and the turning and transporting mechanism is used for turning and transporting the wet sludge along the sludge drying treatment direction, and after the wet sludge is dried, the dried sludge is transported to the outlet mechanism;

[0008] The outlet mechanism is arranged downstream of the turning and transporting mechanism, and the outlet mechanism is used for discharging the dried sludge.

[0009] Optionally, the turning and transporting mechanism comprises a turning device and a track mechanism, the track mechanism is arranged along the sludge drying treatment direction, and the turning device is slidingly arranged on the track mechanism.

[0010] Optionally, the turning and throwing device comprises a hopper and a turning and throwing roller, the turning and throwing roller is rotatably arranged at the bottom of the hopper.

[0011] Optionally, the turning and throwing roller comprises a turning and throwing drum and a plurality of groups of turning and throwing pieces, each group of the turning and throwing pieces is arranged along the length direction of the turning and throwing drum, and each group of the turning and throwing pieces comprises a plurality of turning and throwing blades arranged at intervals along the circumferential direction of the turning and throwing drum.

[0012] Optionally, the turning and throwing blades of adjacent groups of the turning and throwing pieces are arranged at intervals.

[0013] Optionally, the turning and throwing roller further comprises an aeration mechanism, the aeration mechanism comprises a gas supply piece, a gas pipeline and an aeration pipe which are sequentially connected, the gas supply piece is arranged on the turning and throwing drum, the gas pipeline is arranged in the turning and throwing drum, a plurality of the aeration pipes are arranged on the turning and throwing blades, and the gas pipeline is in communication with the aeration pipes.

[0014] Optionally, the turning and throwing roller further comprises a bacteria throwing mechanism, the bacteria throwing mechanism comprises a bacteria agent bin and a plurality of bacteria agent outlets, the bacteria agent bin is arranged in the turning and throwing drum, the plurality of bacteria agent outlets are formed on the surface of the turning and throwing drum, and the bacteria agent outlets are in communication with the bacteria agent bin.

[0015] Optionally, the track mechanism comprises two first tracks and a second track, the two first tracks are arranged at intervals, one end of the first track is close to the mud inlet mechanism, the other end of the first track is close to the mud outlet mechanism, the second track is arranged perpendicularly to the first track, two ends of the second track are respectively in sliding connection with the two first tracks, and the turning and throwing device is connected with the second track and can slide along the length direction of the second track.

[0016] Optionally, the mud inlet mechanism comprises a mud inlet piece, a mud scraping track and a mud scraping piece, one end of the mud scraping track is the mud inlet end, the mud inlet piece is arranged at the mud inlet end, and the mud scraping piece is arranged in sliding connection with the mud scraping track.

[0017] Optionally, the mud scraping track is provided with a limiting structure at the end far away from the mud inlet piece.

[0018] Optionally, the bottom end of the mud scraping piece is provided with two moving wheels arranged at intervals, and the moving wheels are in sliding connection with the mud scraping track.

[0019] Optionally, the mud outlet mechanism comprises a mud outlet chute and a spiral roller, the spiral roller is arranged in the mud outlet chute and arranged along the mud outlet direction.

[0020] Optionally, the mud outlet chute is provided with a mud outlet opening, and the upper surface of the mud outlet chute is inclined downward from the end far away from the mud outlet opening to the end close to the mud outlet opening.

[0021] A sludge drying method applied to the sludge solar drying system of the claim, comprising the following steps:

[0022] Laying the wet sludge discharged by the sludge inlet end;

[0023] Turning over and transporting the wet sludge along the sludge drying direction;

[0024] Discharging the dried sludge after the wet sludge is dried.

[0025] Optionally, the step of turning over and transporting the wet sludge along the sludge drying direction further comprises adding a bacterial agent to the wet sludge and performing an aeration treatment.

[0026] The present application has the following advantages:

[0027] 1. The sludge solar drying system provided by the present application comprises a sludge inlet mechanism, a turning-over and transporting mechanism and a sludge outlet mechanism arranged in sequence along the sludge drying direction, the sludge inlet mechanism comprises a sludge inlet end and a sludge laying assembly, the sludge laying assembly can lay the wet sludge discharged by the sludge inlet end, the turning-over and transporting mechanism is used for turning over and transporting the wet sludge along the sludge drying direction, and the dried sludge is transported to the sludge outlet mechanism after the wet sludge is dried, and then discharged through the sludge outlet mechanism. The automatic distribution, turning over, and collection of the sludge are realized by arranging the sludge inlet mechanism, the turning-over and transporting mechanism and the sludge outlet mechanism, the degree of automation is high, and the working efficiency is high.

[0028] 2. The sludge solar drying system provided by the present application, the turning-over roller comprises an aeration mechanism, the aeration mechanism comprises a gas pipeline and aeration pipes, the gas pipeline is arranged in the turning-over roller, and the aeration pipes are arranged on the turning-over blades. When the turning-over blades turn over the sludge, the aeration pipes can be aerated, which is beneficial to the degradation of the organic matter in the wet sludge, and the dried sludge has high maturity.

[0029] 3. The sludge solar drying system provided by the present application, the turning-over roller further comprises a bacterial agent throwing mechanism, the bacterial agent throwing mechanism comprises a bacterial agent bin and a bacterial agent outlet, the bacterial agent bin is arranged in the turning-over roller, the bacterial agent outlet is formed on the surface of the turning-over roller, and the bacterial agent outlet and the bacterial agent bin are in communication. When the turning-over blades turn over the sludge, the bacterial agent outlet can discharge the aerobic bacterial agent, which is combined with the organic matter in the wet sludge to perform a degradation reaction, the dried sludge has high maturity and stability, and is convenient for direct utilization.

[0030] 4. The sludge solar drying system provided by the present application, the track mechanism comprises two first tracks and a second track, the two first tracks are arranged at intervals, one end of the first track is close to the sludge inlet mechanism, the other end is close to the sludge outlet mechanism, the second track is arranged perpendicularly to the first track, and the two ends of the second track are slidably connected with the two first tracks, and the turning and throwing device is slidably arranged on the second track. Under the action of the track mechanism, the turning and throwing device moves in the sludge drying area, so that the sludge can be turned and thrown, the sludge is fully dried, and the drying effect is good.

[0031] 5. The sludge solar drying system provided by the present application, the sludge inlet mechanism comprises a sludge inlet part, a sludge scraping track and a sludge scraping part, one end of the sludge scraping track is a sludge inlet end, the sludge inlet part is arranged at the sludge inlet end, and is used for conveying sludge to the sludge scraping track, and the sludge scraping part is slidably arranged on the sludge scraping track, and when the sludge scraping part slides, the sludge at the sludge inlet end can be scraped to the sludge scraping track away from the sludge inlet end, and finally the sludge is spread on the entire sludge scraping track. This sludge inlet mechanism can realize the distribution of sludge, and has the advantages of simple structure and strong practicability.

[0032] 6. The sludge solar drying system provided by the present application, the sludge outlet mechanism comprises a sludge outlet groove and a spiral roller, and the spiral roller is arranged in the sludge outlet groove. The sludge outlet groove has a sludge outlet, and the upper surface of the sludge outlet groove is inclined downward from one end away from the sludge outlet to the other end close to the sludge outlet, so as to facilitate the conveying of sludge and prevent the sludge from being retained in the sludge outlet groove.

[0033] 7. The sludge drying method provided by the present application, comprising the following steps: ① laying wet sludge discharged from the sludge inlet end; ② turning and throwing and transporting the wet sludge along the sludge drying direction; and ③ discharging the dried sludge after the wet sludge is dried. The sludge drying process is automated, and the working efficiency is improved.

[0034] 8. The sludge drying method provided by the present application further comprises the steps of adding a bacterial agent to the wet sludge and performing an aeration treatment, so that the organic matter in the wet sludge can be effectively degraded, the dried sludge has high humification degree and high stability, and can be directly utilized. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 It is a schematic diagram of the sludge solar drying system of the present application;

[0037] Figure 2 It is a schematic diagram of the turning and throwing roller in the sludge solar drying system of the present application;

[0038] Figure 3 Figure 1 is a schematic view of the sludge solar drying system of the present application.

[0039] Legend of reference signs:

[0040] 11, sludge inlet, 12, sludge scraping track, 13, sludge scraping member, 14, limiting structure;

[0041] 211, first track, 212, second track, 221, hopper, 222, turning and throwing roller, 2221, turning and throwing drum, 2222, turning and throwing blade, 2223, reinforcing rod, 2231, gas pipeline, 2232, aeration pipe, 2241, inoculant bin, 2242, inoculant outlet, 225, auxiliary material feeding pipe;

[0042] 31, sludge outlet groove, 32, spiral roller. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0047] As Figure 1 shown, the sludge solar drying system of the present application is a preferred embodiment, which can realize automatic material distribution and collection, high automation and high work efficiency when performing sludge drying work.

[0048] The above-mentioned sludge solar drying system comprises: an inlet mechanism, a turning and transporting mechanism and an outlet mechanism arranged in sequence along a sludge drying direction. Figure 1 The turning and transporting mechanism is arranged downstream of the inlet mechanism, and the turning and transporting mechanism is used for turning and transporting the wet sludge along the sludge drying direction, and after the wet sludge is dried, the dried sludge is transported to the outlet mechanism. The outlet mechanism is arranged downstream of the turning and transporting mechanism, and the outlet mechanism is used for discharging the dried sludge. After the wet sludge is laid by the laying assembly of the inlet mechanism, the turning and transporting mechanism moves from one side of the inlet mechanism to the other side of the outlet mechanism, thereby driving the sludge to be gradually laid in the area between the inlet mechanism and the outlet mechanism, and performing sludge drying work in the area. After the wet sludge is dried in the area between the inlet mechanism and the outlet mechanism, the dried sludge is driven into the outlet mechanism by the turning and transporting mechanism, and is discharged out of the sludge solar drying system through the outlet mechanism. Through the cooperation of the inlet mechanism, the turning and transporting mechanism and the outlet mechanism, the automatic processing of sludge distribution, turning and collection is realized, and the work efficiency is greatly improved.

[0049] The entire drying work area can be divided into three parts arranged in sequence: a sludge inlet area, a drying area and a sludge outlet area. The inlet mechanism is arranged at one end of the sludge inlet area away from the sludge outlet area, the outlet mechanism is arranged at one end of the sludge outlet area away from the sludge inlet area, and the track mechanism spans from the sludge inlet area to the sludge outlet area.

[0050] Further, the inlet mechanism comprises: an inlet piece 11, a sludge scraping track 12 and a sludge scraping piece 13, and the sludge scraping track 12 and the sludge scraping piece 13 are the laying assembly. The sludge scraping track 12 is arranged perpendicular to the sludge drying direction, one end of the sludge scraping track 12 is the inlet end, and the inlet piece 11 is arranged at the inlet end. The sludge scraping piece 13 is slidingly arranged on the sludge scraping track 12. Specifically, in this embodiment, the inlet piece 11 is an inlet pipe arranged above the sludge scraping track 12. The wet sludge to be dried is pumped into the inlet pipe by an inlet pump, and then discharged onto the sludge scraping track 12. Two moving wheels are arranged on both sides of the bottom end of the sludge scraping piece 13, and there is a certain distance between the bottom surface of the sludge scraping piece 13 and the sludge scraping track 12. When the sludge scraping piece 13 slides on the sludge scraping track 12, the wet sludge can be gradually laid on the sludge scraping track 12. And the thickness of the wet sludge laid on the sludge scraping track 12 can be changed by changing the distance between the bottom surface of the sludge scraping piece 13 and the sludge scraping track 12.

[0051] The limit structure 14 is a limit plate for limiting the displacement of the scraping member 13 to prevent wet sludge from falling outside the scraping track 12.

[0052] The turning and transporting mechanism comprises a turning device and a track mechanism, and the track mechanism is arranged along the sludge drying direction.

[0053] Further, the track mechanism comprises two first tracks 211 and a second track 212. The two first tracks 211 are arranged at intervals, and one end of each first track 211 is close to the sludge inlet mechanism, and the other end is close to the sludge outlet mechanism. The second track 212 is arranged perpendicularly to the first tracks 211, and the two ends of the second track 212 are respectively connected to the two first tracks 211 in a sliding manner. The turning device is connected to the second track 212 and can slide along the length direction of the second track 212. By arranging the track mechanism, the turning device can move in the entire drying area, and the wet sludge at each position in the drying area can be fully turned.

[0054] The turning device comprises a hopper 221 and a turning roller 222. An auxiliary material feeding pipe 225 is arranged above the hopper 221, and auxiliary materials can be fed into the hopper 221 through the auxiliary material feeding pipe 225. The hopper 221 is used to store the auxiliary materials, which are then uniformly scattered on the wet sludge during the turning process, so that the wet sludge is mixed with the auxiliary materials to facilitate the degradation of organic matter in the wet sludge.

[0055] The turning roller 222 is rotatably arranged at the bottom of the hopper 221. The turning roller 222 comprises a turning drum 2221 and a plurality of groups of turning members. Each group of turning members comprises a plurality of turning blades 2222 arranged at intervals in the circumferential direction of the turning drum 2221. The turning drum 2221 is driven to rotate by a motor, which drives the turning blades 2222 arranged on the turning drum 2221 to rotate. When the turning blades 2222 contact the sludge, the sludge is lifted, thereby playing a turning role. In this way, the relatively dry sludge on the surface can be fully mixed with the relatively wet sludge at the bottom, so that the sludge in the drying area can be fully exposed to sunlight for drying.

[0056] In each group of turning members, a reinforcing rod 2223 is arranged between two adjacent turning blades 2222. The reinforcing rod 2223 can provide support for the turning blades 2222, improve the connection strength of the turning blades 2222, and make the turning blades 2222 more durable and less prone to damage during turning.

[0057] The turning blades 2222 in two adjacent sets of turning components along the axial direction of the turning drum 2221 are staggered. That is, when projected from one end of the axis of the turning drum 2221, the turning blades 2222 in any turning component are located between the corresponding two turning blades 2222 in the adjacent turning component. This avoids the turning blades 2222 bearing too much sludge weight at the same time, which would cause the motor to require too much output torque and damage the motor.

[0058] In each set of turning components, each turning blade 2222 is symmetrically arranged around the axis of the turning drum 2221. Moreover, the turning blade 2222 is arc-shaped. The arc-shaped turning blade 2222 can easily carry up the sludge by utilizing its structural features, and the turning effect is better than that of the flat turning blade 2222.

[0059] Specifically, in this embodiment, five sets of turning components are evenly spaced on the turning drum 2221, and each set of turning components includes four turning blades 2222. From Figure 2 Projecting along the axis of the turning drum 2221 from the right side, the four arc-shaped turning blades 2222 in each set of turning components are arranged in a counterclockwise rotation. The reinforcing rod 2223 connects the middle position of two adjacent turning blades 2222.

[0060] In other embodiments, the number of sets of turning elements can be adaptively selected according to the length of the turning drum 2221. For example, two sets or four sets of turning elements can be set. The number of turning blades 2222 in each set of turning elements can be adaptively selected according to the diameter of the turning drum 2221. For example, two, six, or eight turning blades 2222 can be set. The turning blades 2222 in each set of turning elements can also be adjusted according to the turning running direction and arranged in a clockwise rotation. The number of reinforcing rods 2223 between two adjacent turning blades 2222 can be two, three, or connected to the end positions of the two turning blades 2222.

[0061] like Figure 3 As shown, the turning roller 222 also includes a microbial agent throwing mechanism, which includes an interconnected microbial agent chamber 2241 and a microbial agent outlet 2242. The microbial agent chamber 2241 is disposed inside the turning roller 2221, and the microbial agent outlet 2242 is formed on the side wall of the turning roller 2221. The microbial agent chamber 2241 is used to store aerobic microbial agents. Commonly used aerobic microbial agents include VT1000 and VT1030 microbial agents from Beijing Wotu Tiandi Biotechnology Co., Ltd., microbial agents from EST Tianjin Biotechnology Co., Ltd., and SA organic fertilizer composting agent from Shanghai Siji Biotechnology Co., Ltd.

[0062] The plurality of bacteria agent outlets 2242 are provided, two bacteria agent outlets 2242 are a group, and the two bacteria agent outlets 2242 in the same group are symmetrically arranged relative to the axis of the tumbling drum 2221. In this way, at least one of the two bacteria agent outlets 2242 on the two sides can discharge bacteria agent during the rotation of the tumbling drum 2221. When the tumbling drum 2221 rotates, the bacteria agent in the bacteria agent bin 2241 is discharged from the bacteria agent outlet 2242 close to the bottom of the tumbling drum 2221 under the action of gravity, mixed with wet sludge and auxiliary materials, and evenly distributed in the wet sludge, which is beneficial to the degradation of organic matter in the wet sludge.

[0063] Specifically, in the embodiment, five groups, i.e., ten bacteria agent outlets 2242, are provided on the tumbling drum 2221, and the center points of the five bacteria agent outlets 2242 on the same side are connected in a line parallel to the axis of the tumbling drum 2221.

[0064] In other embodiments, two groups or four groups of bacteria agent outlets 2242 can also be provided, and the center points of the bacteria agent outlets 2242 on the same side can also not be connected in a line parallel to the axis of the tumbling drum 2221, i.e., the bacteria agent outlets 2242 are misaligned and arranged on the outer wall of the tumbling drum 2221.

[0065] The tumbling drum 2221 further comprises an aeration mechanism, which comprises a gas supply member, a gas pipeline 2231 and an aeration pipe 2232 connected in sequence. The gas supply member is arranged on the tumbling drum 2221, and the gas pipeline 2231 extends from the tumbling drum 2221 to the tumbling blade 2222. Specifically, in the embodiment, the gas supply member is a fan, and the gas pipeline 2231 extends from the tumbling drum 2221 to the outer convex surface of the tumbling blade 2222.

[0066] A plurality of aeration pipes 2232 are arranged on the tumbling blade 2222. Specifically, in the embodiment, the aeration pipes 2232 are arranged on the inner concave surface of the tumbling blade 2222, and the aeration pipes 2232 are needle-shaped, i.e., the aeration pipes 2232 have a small diameter and are hollow structures. As the tumbling blade 2222 rotates, the aeration pipes 2232 can crush the sludge synchronously during the aeration process, which is beneficial to the drying process.

[0067] During the tumbling process, the material bin 221 can put auxiliary materials into the wet sludge, the bacteria throwing mechanism can discharge aerobic bacteria agent, and the aeration mechanism can aerate the wet sludge. Under the combined action of the auxiliary materials, the bacteria agent and the aeration, the organic matter and other pollutants in the wet sludge can be effectively degraded, the sludge after drying treatment has high humification degree and is more stable, and can be directly used without further processing.

[0068] The sludge discharging mechanism comprises a sludge discharging chute 31 and a spiral roller 32 arranged in the sludge discharging chute 31 and arranged in the sludge discharging direction. Figure 1The mud outlet 31 has a mud outlet in the direction indicated by the arrow. The dried sludge is transported to the mud outlet 31 by the turning and transporting mechanism, and is discharged from the mud outlet under the action of the spiral roller 32. The mud outlet direction is arranged at an angle with the sludge drying direction, and in this embodiment, the angle is an acute angle, which facilitates system arrangement.

[0069] Furthermore, the upper surface of the mud outlet 31 is inclined downward from the end away from the mud outlet to the end close to the mud outlet, which facilitates sludge discharge and prevents sludge from remaining in the mud outlet 31.

[0070] The embodiment also provides a sludge drying method applied to the above-mentioned sludge solar drying system, which can realize automatic sludge treatment. The sludge drying method comprises the following steps:

[0071] Step one, laying wet sludge discharged from the sludge inlet end;

[0072] The entire drying work area is divided into three parts arranged in sequence: a sludge inlet area, a drying area, and a sludge outlet area. The sludge inlet mechanism is arranged at the end of the sludge inlet area away from the sludge outlet area, the sludge outlet mechanism is arranged at the end of the sludge outlet area away from the sludge inlet area, and the first track 211 in the track mechanism spans from the sludge inlet area to the sludge outlet area.

[0073] The wet sludge falls on the sludge scraping track 12 from the sludge inlet piece 11, and the sludge scraping piece 13 slides back and forth on the sludge scraping track 12 to lay the wet sludge on the sludge scraping track 12. The moisture content of the wet sludge in the sludge inlet area is about 80%, and the thickness of the wet sludge on the sludge scraping track 12 is 10-30 cm, which can be adjusted according to actual conditions. This step can continue until the wet sludge is spread over the drying area under the action of the turning device.

[0074] Step two, turning and transporting the wet sludge along the sludge drying direction;

[0075] The initial position of the turning device is adjusted so that the turning device is located at one end of the second track 212, and the second track 212 is located at the end of the first track 211 close to the sludge inlet mechanism. And at the initial position, the fungicide is added to the fungicide bin 2241. Then the turning device is started, and the turning device moves from the sludge inlet area to the sludge outlet area. During the movement, the wet sludge is carried from the sludge inlet area to the drying area under the action of the turning blade 2222. And when the turning device enters the drying area, the moving speed of the second track 212 is reduced and the rotating speed of the turning drum 2221 is increased to realize sufficient turning of the wet sludge.

[0076] In step two, the step of adding bacteria to the wet sludge and performing aeration treatment is also included. Specifically, when the turning device enters the second half of the drying zone, i.e. the half of the drying zone close to the sludge discharge area, the auxiliary material is added to the hopper 221 through the auxiliary material feeding pipe 225. After the addition is completed, the discharge port of the hopper 221 is opened, and the auxiliary material falls on the wet sludge, while the bacteria in the bacteria bin 2241 are discharged from the bacteria outlet 2242, and the aeration mechanism discharges gas through the aeration pipe 2232 to perform aeration, thereby strengthening the aerobic fermentation of the wet sludge in the drying zone and accelerating the degradation of organic matter in the wet sludge.

[0077] That is, in the first half of the drying zone, only the turning drum 2221 rotates, and the wet sludge is turned by the turning blade 2222. The residence time of the wet sludge in the first half of the drying zone is 5-10 days, and the turning is continuously performed to dry the wet sludge, so that the moisture content of the wet sludge is reduced to 55-70%.

[0078] In the second half of the drying zone, not only turning is performed, but also aerobic fermentation is performed, and the turning blade 2222 turns the wet sludge while the auxiliary material, bacteria and aeration treatment are performed. The sludge stays in the second half for 10-15 days, and the moisture content of the wet sludge is further reduced to 35-55%.

[0079] Step three: After the wet sludge is dried, the dried sludge is discharged.

[0080] When the turning device moves to the sludge discharge area, the moving speed of the second track 212 is increased, and the rotating speed of the turning drum 2221 is reduced, so that the sludge treated by drying is taken from the drying zone to the sludge discharge mechanism. Under the action of the turning device, the sludge enters the sludge discharge chute 31, is broken under the action of the spiral roller 32, and is then discharged from the sludge discharge port.

[0081] Obviously, the above embodiments are only examples for the purpose of clarity, and are not limiting to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A sludge drying method, applied to a solar sludge drying system, characterized in that, The sludge solar drying system includes: a sludge feeding mechanism, a turning and transporting mechanism, and a sludge discharging mechanism arranged sequentially along the sludge drying treatment direction. The sludge feeding mechanism includes a sludge feeding end and a sludge spreading assembly, wherein the sludge spreading assembly is used to spread the wet sludge discharged from the sludge feeding end; The turning and transporting mechanism is located downstream of the sludge feeding mechanism. The turning and transporting mechanism is used to turn and transport the wet sludge along the sludge drying treatment direction. After the wet sludge is dried, the dried sludge is transported to the sludge discharge mechanism. The sludge discharge mechanism is located downstream of the turning and transporting mechanism, and is used to discharge the dried sludge. The turning and transport mechanism includes a turning device and a track mechanism. The track mechanism is arranged along the direction of sludge drying treatment, and the turning device is slidably arranged on the track mechanism. The turning and turning device includes: a hopper (221) and a turning and turning roller (222). The turning and turning roller (222) is rotatably disposed at the bottom of the hopper (221), and an auxiliary material feed pipe (225) is disposed above the hopper (221). The turning roller (222) includes a turning drum (2221) and multiple sets of turning components. The multiple sets of turning components are arranged along the length direction of the turning drum (2221), and each set of turning components includes multiple turning blades (2222) arranged circumferentially along the turning drum (2221). The turning roller (222) also includes an aeration mechanism and a bacteria-throwing mechanism; The aeration mechanism includes an air supply component, a gas pipe (2231), and an aeration pipe (2232) connected in sequence. The air supply component is disposed on the turning drum (2221). The gas pipe (2231) extends from the turning drum (2221) to the outer convex surface of the turning blade (2222). A plurality of aeration pipes (2232) are disposed on the turning blade (2222), and the gas pipe (2231) is connected to the aeration pipe (2232). The aeration pipe (2232) is disposed on the concave surface of the turning blade (2222). The aeration pipe (2232) is needle-shaped and has a hollow structure. As the turning blade (2222) rotates, the aeration pipe (2232) can simultaneously crush the sludge during the aeration process. The shoveling mechanism includes a shoveling agent chamber (2241) and a shoveling agent outlet (2242). The shoveling agent chamber (2241) is disposed inside the shoveling drum (2221). A plurality of shoveling agent outlets (2242) are formed on the surface of the shoveling drum (2221), and the shoveling agent outlets (2242) are connected to the shoveling agent chamber (2241). The sludge drying method includes the following steps: Lay the wet sludge discharged at the sludge inlet end; The wet sludge is turned over and transported along the direction of sludge drying treatment. When the turning device is in the first half of the drying zone, only the turning drum (2221) rotates and the wet sludge is turned over by the turning blades (2222). The wet sludge stays in the first half of the drying zone for 5-10 days. When the turning device is in the second half of the drying zone, auxiliary materials are added to the silo (221) through the auxiliary material feed pipe (225). At the same time, bacterial agents are added to the wet sludge and aeration treatment is carried out. The wet sludge stays in the second half of the drying zone for 10-15 days. After the wet sludge has dried, the dried sludge is discharged.

2. The sludge drying method according to claim 1, characterized in that, The turning blades (2222) of the adjacent turning components are staggered.

3. The sludge drying method according to claim 1, characterized in that, The track mechanism includes two first tracks (211) and a second track (212). The two first tracks (211) are spaced apart, with one end of the first track (211) close to the mud inlet mechanism and the other end close to the mud outlet mechanism. The second track (212) is perpendicular to the first track (211), and both ends of the second track (212) are slidably connected to the two first tracks (211). The turning and throwing device is connected to the second track (212) and can slide along the length direction of the second track (212).

4. The sludge drying method according to claim 1, characterized in that, The mud feeding mechanism includes a mud feeding component (11), a mud scraping track (12), and a mud scraping component (13). One end of the mud scraping track (12) is the mud feeding end. The mud feeding component (11) is disposed at the mud feeding end, and the mud scraping component (13) is slidably disposed on the mud scraping track (12).

5. The sludge drying method according to claim 4, characterized in that, A limiting structure (14) is provided at one end of the sludge scraping track (12) away from the sludge feeder (11).

6. The sludge drying method according to claim 4, characterized in that, The bottom end of the scraper (13) is provided with two movable wheels at intervals, and the movable wheels are slidably connected to the scraper track (12).

7. The sludge drying method according to claim 1, characterized in that, The mud discharge mechanism includes a mud discharge trough (31) and a spiral roller (32), wherein the spiral roller (32) is disposed in the mud discharge trough (31) and is disposed along the mud discharge direction.

8. The sludge drying method according to claim 7, characterized in that, The mud discharge trough (31) has a mud discharge port, and the upper surface of the mud discharge trough (31) slopes downward from the end away from the mud discharge port to the end closer to the mud discharge port.

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