A sludge solar drying device, a sludge drying system and a 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 device, sludge drying system and sludge drying method.This kind of sludge solar drying device can discharge water vapor produced in drying process in time, facilitate drying work, speed up drying speed.The above-mentioned sludge solar drying device includes: overturning mechanism and exhaust mechanism;Overturning mechanism is set in drying area, and overturning mechanism is used to overturn wet sludge in drying area;Exhaust mechanism is set in the drying area, and exhaust mechanism is used to discharge water vapor evaporated by wet sludge.This application solves the problem that water vapor cannot be discharged in time in the drying process of sludge solar drying device in prior art, which can increase the humidity of drying area, slow down the drying speed, and is not conducive to the drying work.

Description

TECHNICAL FIELD

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

[0002] A common sludge drying method is to irradiate sludge by sunlight, evaporate water in the sludge by using heat of the sunlight, thereby reducing water content of the sludge, eliminating odor and pathogen of the sludge, and is a sludge drying technology with small investment and low operation cost for sludge reduction, harmlessness and resource utilization.

[0003] The existing sludge solar drying device is arranged in a solar drying shed to enhance the light and heat effect. The sludge solar drying device generally uses a turning machine to continuously and comprehensively turn and throw wet sludge laid in a drying area, so that the wet sludge is fully contacted with sunlight. After a period of time, water in the wet sludge is evaporated to achieve the drying effect. However, the water vapor evaporated from the wet sludge in the drying process will stay in the drying area and cannot be discharged in time, thereby increasing humidity of the drying area and being not conducive to the drying work and slowing down the drying speed. SUMMARY

[0004] Therefore, the present application aims to overcome the defects in the prior art that water vapor cannot be discharged in time in the drying process of the sludge solar drying device, which increases humidity of the drying area, slows down the drying speed and is not conducive to the drying work, thereby providing a sludge solar drying device, a sludge drying system and a sludge drying method which can discharge water vapor generated in the drying process in time, are conducive to the drying work and can speed up the drying speed.

[0005] To this end, the present application provides a sludge solar drying device, comprising:

[0006] a turning mechanism arranged in the drying area, the turning mechanism being used for turning and throwing wet sludge in the drying area;

[0007] an exhaust mechanism arranged in the drying area, the exhaust mechanism being used for discharging water vapor evaporated from the wet sludge.

[0008] Optionally, the exhaust mechanism comprises a plurality of air extraction structures, and the plurality of air extraction structures are arranged along a sludge drying treatment direction and located at least one side of the drying area.

[0009] Optionally, the sludge solar drying device further comprises a track mechanism arranged in the drying area, and the turning mechanism is arranged on the track mechanism and can move along the track mechanism.

[0010] Optionally, the air extraction structure is arranged on the track mechanism.

[0011] Optionally, the air extraction structure comprises air extraction ports and an air extraction member, the air extraction ports are arranged on the track mechanism in the sludge drying direction, and the air extraction member is arranged in the air extraction ports.

[0012] Optionally, the air exhaust mechanism further comprises an air exhaust assembly, and the air exhaust assembly is in communication with the air extraction structure.

[0013] Optionally, the air exhaust assembly comprises a plurality of air exhaust pipes, the air inlet end of each air exhaust pipe is in communication with one air extraction structure, and the air outlet end of the air exhaust pipe is located outside the drying area.

[0014] Optionally, the air exhaust pipe is arranged below the drying area and extends in a direction perpendicular to the sludge drying direction.

[0015] Optionally, the air outlet end of the air exhaust pipe is provided with an odor treatment device.

[0016] Optionally, the track mechanism comprises two first tracks and a second track, the two first tracks are arranged in a spaced manner, and the first tracks are arranged in the sludge drying direction, the air extraction structure is arranged on the first track, the two ends of the second track are respectively connected with the two first tracks in a sliding manner, and the tumbler mechanism is arranged on the second track in a sliding manner.

[0017] A sludge drying system comprises the sludge solar drying device, and further comprises a sludge inlet device, a sludge outlet device and a control system, the drying area is sequentially divided into a sludge inlet area, a drying area and a sludge outlet area in the sludge drying direction, the sludge inlet device is arranged at one end of the sludge inlet area away from the sludge outlet area, the sludge outlet device is arranged at one end of the sludge outlet area away from the sludge inlet area, the sludge solar drying device extends from the sludge inlet area to the sludge outlet area, and the control system is used for controlling the operation of the sludge drying system.

[0018] Optionally, the sludge drying system further comprises a position detection assembly, the position detection assembly is electrically connected with the control system, the position detection assembly is used for detecting the position of the tumbler mechanism (11), and the position detection assembly comprises a first position detection member, a second position detection member, a third position detection member and a fourth position detection member, the first position detection member is arranged at the sludge inlet device, the second position detection member is arranged at the junction of the sludge inlet area and the drying area, the third position detection member is arranged at the junction of the drying area and the sludge outlet area, and the fourth position detection member is arranged at the sludge outlet device.

[0019] Optionally, the mud feeding device comprises a mud feeding member, a mud feeding track, a mud scraping member and a limiting member, the mud feeding member is arranged at one end of the mud feeding track, the mud scraping member is slidingly arranged on the mud feeding track, and the limiting member is arranged at the other end of the mud feeding track.

[0020] Optionally, the mud feeding device further comprises a cloth detection element, the cloth detection element is arranged on the limiting member, the cloth detection element is electrically connected with the control system, and the cloth detection element is used for detecting whether the wet sludge is full on the mud feeding track.

[0021] Optionally, the mud discharging device comprises a mud discharging groove and a spiral roller shaft, the spiral roller shaft is rotatably arranged in the mud discharging groove, and one end of the mud discharging groove is a mud discharging port.

[0022] Optionally, the bottom of the mud discharging groove is provided with a gravity detection element, the gravity detection element is electrically connected with the control system, and the gravity detection element is used for detecting the weight of the dried sludge in the mud discharging groove.

[0023] A sludge drying method applied to the sludge drying system, comprising the following steps:

[0024] Laying wet sludge discharged by the mud feeding member;

[0025] Turning over and transporting the wet sludge along the sludge drying direction;

[0026] Discharging dried sludge after the wet sludge is dried.

[0027] Optionally, the step of turning over and transporting the wet sludge along the sludge drying direction further comprises detecting the position of the turning over mechanism and controlling the running track of the turning over mechanism.

[0028] The present application has the following advantages:

[0029] 1. The sludge solar drying device provided by the present application comprises a turning over mechanism and an exhaust mechanism arranged in a drying area, the turning over mechanism is used for turning over wet sludge in the drying area, so that the wet sludge can be fully dried. The exhaust mechanism is used for discharging water vapor evaporated by the wet sludge during drying, accelerating the air flow in the drying shed, thereby facilitating the drying of the wet sludge, accelerating the drying speed and improving the drying efficiency.

[0030] 2. The sludge solar drying device provided by the present application, the air extraction structure comprises an air extraction port and an air extraction member, the air extraction port is arranged on the track mechanism in the sludge drying direction, and the air extraction member is arranged in the air extraction port. This air extraction mechanism has simple structure, small space occupation and good air extraction effect.

[0031] 3. The sludge solar drying device provided by the present application, the exhaust assembly comprises a plurality of exhaust pipes, the air inlet end of each exhaust pipe is communicated with an air extraction structure, and the air outlet end of the exhaust pipe is located outside the drying area. Preferably, the exhaust pipe is arranged below the drying area and extends along a direction perpendicular to the sludge drying treatment direction, so that when water vapor flows in the exhaust pipe, the residual heat of the water vapor can be used to heat the wet sludge at the bottom of the drying area, thereby facilitating the drying of the wet sludge.

[0032] 4. The sludge solar drying device provided by the present application, the air outlet end of the exhaust pipe is provided with an odor treatment device, which can deodorize the water vapor in the exhaust pipe, thereby avoiding the influence of the sludge drying process on the health environment and air quality of the area where the solar drying shed is located.

[0033] 5. The sludge drying system provided by the present application further comprises a sludge inlet device, a sludge outlet device and a control system, the drying area is sequentially divided into a sludge inlet area, a drying area and a sludge outlet area along the sludge drying treatment direction, and the sludge inlet device is arranged at one end of the sludge inlet area away from the sludge outlet area, the sludge outlet device is arranged at one end of the sludge outlet area away from the sludge inlet area, the sludge solar drying device extends from the sludge inlet area to the sludge outlet area, and the control system is used to control the operation of the sludge drying system. By controlling the operation of the entire sludge drying system through the control system, full-automatic control of the sludge drying system is realized, thereby reducing manual work and improving work efficiency.

[0034] 6. The sludge drying system provided by the present application further comprises a position detection assembly, the position detection assembly comprises a first position detection element, a second position detection element, a third position detection element and a fourth position detection element, the first position detection element is arranged at the sludge inlet device, the second position detection element is arranged at the junction of the sludge inlet area and the drying area, the third position detection element is arranged at the junction of the drying area and the sludge outlet area, and the fourth position detection element is arranged at the sludge outlet device. The position of the turning and throwing mechanism is detected in real time through the first position detection element, the second position detection element, the third position detection element and the fourth position detection element, so as to accurately control the action of the turning and throwing mechanism, improve the turning and throwing efficiency, and further improve the sludge drying efficiency.

[0035] 7. The sludge drying system provided by the present application, the sludge inlet device further comprises a material detection element, the material detection element is arranged on the limiting element, and whether the wet sludge is fully spread on the sludge inlet track can be detected through the material detection element, so as to accurately control the action of the sludge inlet element and the sludge scraping element. The material detection element realizes automatic control of wet sludge spreading, thereby improving control accuracy and work efficiency.

[0036] 8. The sludge drying system provided by the present application, the sludge outlet device comprises a sludge outlet groove and a spiral roller, the spiral roller is arranged in the sludge outlet groove, a gravity detection element is arranged at the bottom of the sludge outlet groove, the weight of the sludge in the sludge outlet groove is detected through the gravity detection element, and when the weight of the sludge reaches a set value, the discharging can be started. The gravity detection element is arranged to realize automatic control of sludge discharging, and improve control precision and work efficiency.

[0037] 9. The sludge drying method provided by the present application, comprising the following steps: ① laying wet sludge discharged by a sludge inlet device; ② turning and throwing the wet sludge and transporting the wet sludge along a sludge drying direction; and ③ discharging dried sludge after the wet sludge is dried. The sludge drying process is automated, and work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] 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.

[0039] Figure 1 FIG. 1 is a schematic diagram of a sludge solar drying device of the present application;

[0040] Figure 2 FIG. 2 is a schematic diagram of a turning and throwing mechanism in the sludge solar drying device of the present application;

[0041] Figure 3 FIG. 3 is a schematic diagram of a throwing bacteria mechanism and an aeration mechanism in the sludge solar drying device of the present application;

[0042] Figure 4 FIG. 4 is a schematic diagram of a sludge drying system of the present application.

[0043] Legend of the drawings:

[0044] 11, turning and throwing mechanism, 111, body, 112, turning and throwing roller, 1121, turning and throwing drum, 1122, turning and throwing blade, 1123, reinforcing rod, 113, hopper, 114, throwing bacteria mechanism, 1141, bacteria agent bin, 1142, bacteria agent outlet, 115, aeration mechanism, 1151, gas pipeline, 1152, aeration pipe, 116, auxiliary material feeding pipe, 12, exhaust mechanism, 121, air suction port, 122, exhaust pipeline, 123, odor treatment device, 13, track mechanism, 131, first track, 132, second track;

[0045] 21, sludge inlet device, 22, sludge inlet track, 23, sludge scraping device, 24, limiting device;

[0046] 31. Mud discharge trough; 32. Spiral roller. Detailed Implementation

[0047] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] like Figure 1 The image shows a preferred embodiment of the sludge solar drying device of the present invention. This sludge solar drying device can be used in a solar drying shed for sludge drying. Because this sludge solar drying device can promptly discharge the water vapor generated during the drying process and accelerate the airflow inside the drying shed, it is more conducive to the drying work and can speed up the drying process.

[0052] The sludge solar drying device comprises a turning mechanism 11 and an exhaust mechanism 12. The turning mechanism 11 and the exhaust mechanism 12 are both arranged in the drying area. The turning mechanism 11 is used for turning the wet sludge in the drying area, and the exhaust mechanism 12 is used for exhausting the water vapor evaporated by the wet sludge. When the turning mechanism 11 turns the sludge, the sludge is dried under the action of sunlight. The water in the wet sludge is evaporated into water vapor. Under the action of the exhaust mechanism 12, the water vapor can be quickly exhausted, so that the water vapor does not stay in the drying area for a long time, the humidity of the drying area is increased, and the drying of the wet sludge is affected. Therefore, under the action of the exhaust mechanism 12, the drying speed can be improved, and the efficiency of the drying work can be improved.

[0053] Further, the sludge solar drying device further comprises a track mechanism 13. The track mechanism 13 is arranged in the drying area, and the turning mechanism 11 is arranged on the track mechanism 13 and can move along the track mechanism 13. Specifically, the track mechanism 13 comprises two first tracks 131 and a second track 132. The two first tracks 131 are arranged at intervals, and the first track 131 is arranged along the sludge drying direction. The sludge drying direction is indicated by the arrow below the first track 131 in the figure. The two ends of the second track 132 are respectively slidably connected with the two first tracks 131, and the turning mechanism 11 is slidably arranged on the second track 132. By arranging the track mechanism 13, the turning mechanism 11 can be driven to move in the entire drying area, so that the wet sludge in the entire drying area can be turned over, and the wet sludge can be dried more fully. Figure 1

[0054] The exhaust mechanism 12 comprises a plurality of air suction structures. The plurality of air suction structures are arranged along the sludge drying direction and located on at least one side of the drying area. Further, the air suction structure is arranged on the track mechanism 13, so that the installation space occupied by the air suction structure is smaller. Specifically, since the track mechanism 13 comprises two first tracks 131 arranged at intervals, and the two first tracks 131 are located on the two sides of the drying area, the air suction structure is arranged on the first track 131. A plurality of air suction structures can be arranged on one of the first tracks 131 or distributed on the two first tracks 131.

[0055] Further, the air suction structure comprises an air suction port 121 and an air suction member. A plurality of air suction ports 121 are arranged at intervals on the track mechanism 13 along the sludge drying direction, and the air suction port 121 is provided with an air suction member. In the embodiment, five air suction structures are arranged, i.e. five air suction ports 121. The five air suction ports 121 are arranged on the two first tracks 131 at intervals. Three of them are arranged at intervals on the first track 131 on one side of the drying area, and the other two are arranged on the first track 131 on the other side of the drying area. The air suction member is preferably a fan, which is used to suck the water vapor and exhaust the water vapor from the air suction port 121. ​

[0056] In other embodiments, the number of air extraction structures can be three, eight, ten, etc., and they can be set on one of the first tracks 131 or on both first tracks 131. The number of air extraction ports 121 on the two first tracks 131 can be equal or unequal, and the air extraction ports 121 on the two first tracks 131 can be arranged facing each other or staggered.

[0057] The exhaust mechanism 12 also includes an exhaust assembly, which is connected to the extraction structure. The exhaust assembly includes multiple exhaust pipes 122, the inlet end of each exhaust pipe 122 is connected to an extraction structure, and the outlet end of each exhaust pipe 122 is located outside the drying area. Each exhaust pipe 122 is correspondingly connected to an extraction structure, which facilitates the discharge of water vapor extracted by the extraction structure outside the drying area.

[0058] Specifically, in this embodiment, the exhaust pipe 122 is located below the drying zone and extends perpendicular to the sludge drying treatment direction. When water vapor flows in the exhaust pipe 122, it can use its own heat to heat the wet sludge from below the drying zone, which is beneficial for the drying of the wet sludge.

[0059] An odor treatment device 123 is installed at the outlet of the exhaust pipe 122 to treat the odor carried in the water vapor, so as to avoid the sludge drying process from affecting the sanitary environment and air quality of the area where the solar drying shed is located. Specifically, in this embodiment, two odor treatment devices 123 are installed, respectively on both sides of the drying area. The exhaust pipe 122 on the same side of the drying area extends from below the drying area and along the direction perpendicular to the sludge drying process to the other side of the drying area, and the outlet of the exhaust pipe 122 on the same side of the drying area is connected to a common odor treatment device 123.

[0060] In other embodiments, an odor treatment device 123 may also be provided at the outlet of each exhaust pipe 122.

[0061] like Figure 2 , Figure 3 As shown, the turning and sludge mechanism 11 includes a machine body 111 and a turning and sludge roller 112. The turning and sludge roller 112 is rotatably mounted on the machine body 111. The turning and sludge roller 112 includes a turning and sludge drum 1121 and multiple sets of turning and sludge components. The multiple sets of turning and sludge components are arranged along the length of the turning and sludge drum 1121, and each set of turning and sludge components includes multiple turning and sludge blades 1122 spaced apart circumferentially along the turning and sludge drum 1121. The turning and sludge drum 1121 rotates under the drive of a motor, which drives the turning and sludge blades 1122 arranged on the turning and sludge drum 1121 to rotate. When the turning and sludge blades 1122 come into contact with the sludge, they can lift the sludge, thereby achieving the function of turning and sludge. This allows the sludge to fully contact the sunlight and dry thoroughly.

[0062] The reinforcing rods 1123 are arranged between the two adjacent turning blades 1122 in each group of turning pieces. The reinforcing rods 1123 can provide support for the turning blades 1122, improve the connection strength of the turning blades 1122, and make the turning blades 1122 more durable and less likely to be damaged during turning.

[0063] The turning blades 1122 in the two adjacent groups of turning pieces along the axial direction of the turning drum 1121 are arranged in a staggered manner. That is, from the end of the projection of the turning drum 1121 axis, the turning blades 1122 in any turning piece are located between the corresponding two turning blades 1122 in the turning piece adjacent to the turning piece. In this way, the weight of the sludge borne by the turning blades 1122 at the same time can be avoided to be too large, which can prevent the motor from being damaged due to too large output torque required.

[0064] The turning blades 1122 in each group of turning pieces are arranged in a rotational symmetry around the axis of the turning drum 1121. The turning blades 1122 are in a circular arc shape, which can facilitate the lifting of sludge by utilizing the structural characteristics of the turning blades 1122, and the turning effect is better than that of the flat turning blades 1122.

[0065] Specifically, in the present embodiment, five groups of turning pieces are uniformly arranged on the turning drum 1121, and each group of turning pieces includes four turning blades 1122. From the right side of the projection of the turning drum 1121 along the axis, the four circular arc-shaped turning blades 1122 in each group of turning pieces are arranged in a counterclockwise rotation. Figure 2

[0066] In other embodiments, the number of groups of turning pieces can be adaptively selected according to the length of the turning drum 1121, for example, two groups, four groups, etc. The number of turning blades 1122 in each group of turning pieces can be adaptively selected according to the diameter of the turning drum 1121, for example, two, six, eight, etc. The turning blades 1122 in each group of turning pieces can also be adjusted according to the turning direction, arranged in a clockwise rotation. The number of reinforcing rods 1123 between the two adjacent turning blades 1122 can be two, three, etc., or can be connected at the end positions of the two turning blades 1122.

[0067] ​In other embodiments, a material bin 113 can also be arranged above the tumbler 112 for storing auxiliary materials. When the tumbler 112 is running in the drying area, the auxiliary materials are dropped on the wet sludge through the material bin 113, so as to facilitate the organic decomposition of the organic matters in the wet sludge. The auxiliary materials can be added into the material bin 113 through an auxiliary material feeding pipe 116 arranged above the material bin 113, and the auxiliary material feeding pipe 116 is located at a middle position of the drying area and can move along the extension direction of the second track 132.

[0068] Meanwhile, the tumbler 112 can also be provided with a bacteria throwing mechanism 114 and an aeration mechanism 115. The bacteria throwing mechanism 114 is used to discharge the aerobic bacteria agent, the aeration mechanism 115 is used to aerate the wet sludge, and the auxiliary materials dropped in the wet sludge can make the organic matters in the wet sludge react and degrade. The sludge after drying can be directly utilized.

[0069] The bacteria throwing mechanism 114 includes a bacteria agent bin 1141 and a bacteria agent outlet 1142 which are in communication with each other. The bacteria agent bin 1141 is arranged in the tumbler 1121, and the bacteria agent outlet 1142 is formed on the side wall of the tumbler 1121. The bacteria agent bin 1141 is used to store the aerobic bacteria agent. Commonly used aerobic bacteria agents include VT1000 bacteria agent and VT1030 bacteria agent of Beijing Wotian Diqi Biological Technology Co., Ltd., microbial bacteria agent of EST Tianjin Biological Technology Co., Ltd., and SA organic fertilizer composting agent of Shanghai Sijiqi Biological Technology Co., Ltd.

[0070] The bacteria agent outlet 1142 is provided with a plurality of bacteria agent outlets 1142, two bacteria agent outlets 1142 form a group, and the two bacteria agent outlets 1142 in the same group are symmetrically arranged with respect to the axis of the tumbler 1121. In this way, at least one of the two bacteria agent outlets 1142 on the two sides can discharge the bacteria agent during the rotation of the tumbler 1121. When the tumbler 1121 rotates, the bacteria agent in the bacteria agent bin 1141 is discharged from the bacteria agent outlet 1142 close to the bottom of the tumbler 1121 under the action of gravity, and is mixed with the wet sludge and the auxiliary materials, so that the bacteria agent is uniformly distributed in the wet sludge, which is beneficial to the degradation of the organic matters in the wet sludge.

[0071] Specifically, in the present embodiment, five groups of bacteria agent outlets 1142, i.e. ten bacteria agent outlets 1142, are arranged on the tumbler 1121, and the center points of the five bacteria agent outlets 1142 on the same side are connected in parallel with the axis of the tumbler 1121.

[0072] In other embodiments, two groups or four groups of bacteria agent outlets 1142 can also be arranged, and the center points of the bacteria agent outlets 1142 on the same side can also not be connected in parallel with the axis of the tumbler 1121, i.e. the bacteria agent outlets 1142 are arranged in a staggered manner on the outer wall of the tumbler 1121.

[0073] The aeration mechanism 115 comprises a gas supply member, a gas pipeline 1151 and an aeration pipeline 1152 in sequence. The gas supply member is arranged on the tumble drum 1121, and the gas pipeline 1151 extends from the tumble drum 1121 to the tumble blade 1122. Specifically, in the embodiment, the gas supply member is a fan, and the gas pipeline 1151 extends from the tumble drum 1121 to the outer convex surface of the tumble blade 1122.

[0074] The tumble blade 1122 is provided with a plurality of aeration pipelines 1152. Specifically, in the embodiment, the aeration pipelines 1152 are arranged on the inner concave surface of the tumble blade 1122, and the aeration pipelines 1152 are needle-shaped, i.e., the aeration pipelines 1152 have a small diameter and are hollow structures. As the tumble blade 1122 rotates, the aeration pipelines 1152 can crush the sludge synchronously during the aeration process, which is beneficial to the drying work.

[0075] As shown in FIG. 1, Figure 4 The embodiment also provides a sludge drying system, which comprises a sludge solar drying device, a sludge feeding device, a sludge discharging device and a control system. The structure of the sludge solar drying device is the same as that of the sludge solar drying device in the above embodiment, and thus is not described herein.

[0076] The drying area is sequentially divided into a sludge feeding area, a drying area and a sludge discharging area along the sludge drying direction, the sludge feeding device is arranged at one end of the sludge feeding area away from the sludge discharging area, the sludge discharging device is arranged at one end of the sludge discharging area away from the sludge feeding area, and the sludge solar drying device extends from the sludge feeding area to the sludge discharging area. The sludge feeding device is used for distributing wet sludge, the sludge solar drying device is used for tumbling and transporting the wet sludge, the sludge discharging device is used for discharging the dried sludge, and the control system is used for controlling the operation of the sludge drying system.

[0077] The sludge feeding device comprises a sludge feeding member 21, a sludge feeding track 22, a sludge scraping member 23 and a limiting member 24. The sludge feeding member 21 is arranged at one end of the sludge feeding track 22, the sludge scraping member 23 is slidingly arranged on the sludge feeding track 22, and the limiting member 24 is arranged at the other end of the sludge feeding track 22. The sludge feeding member 21 discharges wet sludge onto the sludge feeding track 22, and the sludge scraping member 23 can uniformly lay the wet sludge on the sludge feeding track 22 when sliding on the sludge feeding track 22. The limiting member 24 can limit the positions of the wet sludge and the sludge scraping member 23, so as to prevent the wet sludge from scattering outside the sludge feeding track 22. Specifically, in the embodiment, the sludge feeding member 21 is a sludge feeding pipeline arranged above the sludge feeding track 22. The wet sludge to be dried is pumped into the sludge feeding pipeline by a sludge feeding pump, and then discharged onto the sludge feeding track 22. Two moving wheels are arranged at the two sides of the bottom end of the sludge scraping member 23. There is a certain distance between the bottom surface of the sludge scraping member 23 and the sludge feeding track 22, and the thickness of the wet sludge laid on the sludge feeding track 22 can be changed by changing the distance between the bottom surface of the sludge scraping member 23 and the sludge feeding track 22. The limiting member 24 is a limiting plate.

[0078] The sludge feeding device further comprises a material detection element arranged on the limiting member 24, which is electrically connected to the control system. The material detection element is used to detect whether the wet sludge is fully laid on the sludge feeding track. When the wet sludge is fully laid on the sludge feeding track, a signal is sent to the control system, which controls the sludge pump to stop feeding sludge to the sludge feeding member 21. In this embodiment, the material detection element is preferably a contact sensor.

[0079] The sludge discharging device comprises a sludge discharging chute 31 and a spiral roller 32 rotatably arranged in the sludge discharging chute 31. One end of the sludge discharging chute 31 is a sludge discharging opening. The upper surface of the sludge discharging chute 31 is inclined downward from the end away from the sludge discharging opening to the end close to the sludge discharging opening, which facilitates the discharge of sludge and prevents the sludge from remaining in the sludge discharging chute 31. After the dried sludge is transported to the sludge discharging chute 31 by the turning and throwing mechanism 11, the sludge is crushed by the spiral roller 32 and then discharged from the sludge discharging opening.

[0080] The bottom of the sludge discharging chute 31 is provided with a gravity detection element electrically connected to the control system. The gravity detection element is used to detect the weight of the dried sludge in the sludge discharging chute 31. When the weight of the sludge in the sludge discharging chute 31 reaches a preset value, the control system controls the sludge discharging opening to open and discharge the sludge. In this embodiment, the gravity detection element is preferably a gravity sensor.

[0081] The sludge drying system further comprises a position detection assembly electrically connected to the control system. The position detection assembly is used to detect the position of the turning and throwing mechanism 11. The position detection assembly comprises a first position detection member, a second position detection member, a third position detection member and a fourth position detection member. The first position detection member is arranged at the sludge feeding device, the second position detection member is arranged at the junction of the sludge feeding area and the drying area, the third position detection member is arranged at the junction of the drying area and the sludge discharging area, and the fourth position detection member is arranged at the sludge discharging device. The position of the turning and throwing mechanism 11 can be detected in real time by the first position detection member, the second position detection member, the third position detection member and the fourth position detection member, and the speed of the turning and throwing drum 1121 in the turning and throwing mechanism 11 and the moving speed of the turning and throwing mechanism 11 can be accurately controlled. In this embodiment, the first position detection member, the second position detection member, the third position detection member and the fourth position detection member are preferably position sensors.

[0082] This embodiment also provides a sludge drying method applied to the sludge drying system. The structure of the sludge drying system is the same as that of the sludge drying system in the above-mentioned embodiments, and thus will not be described again.

[0083] Step one, laying the wet sludge discharged by the sludge feeding member 21;

[0084] The wet sludge is pumped into the sludge inlet 21 by the sludge inlet pump and then falls on the sludge inlet track 22, and the sludge scraping member 23 slides back and forth on the sludge inlet track 22 to spread the wet sludge on the sludge inlet track 22. 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 inlet track 22 is 10-30 cm, which can be adjusted according to actual conditions.

[0085] In the process of spreading the wet sludge, the wet sludge on the sludge inlet track 22 is detected by the sludge detection element, and when the wet sludge is full, the control system can be used to close the sludge inlet pump.

[0086] Step two, turn over and transport the wet sludge in the sludge drying direction;

[0087] Adjust the initial position of the turning and throwing mechanism 11 so that the turning and throwing mechanism 11 is located at one end of the second track, and the second track 132 is located at the end of the first track 131 close to the sludge inlet device. And at the initial position, the bacteria agent is added to the bacteria agent bin 1141. Then start the turning and throwing mechanism 11, and make the turning and throwing mechanism 11 move 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 1122. And when the turning and throwing mechanism 11 enters the drying area, the moving speed of the second track 132 is reduced, and the rotating speed of the turning drum 1121 is increased to realize the full turning and throwing of the wet sludge.

[0088] In step two, the step of adding auxiliary materials and bacteria agents to the wet sludge and performing aeration treatment is also included. Specifically, when the turning and throwing mechanism 11 enters the second half of the drying area, that is, the half of the drying area close to the sludge outlet area, the auxiliary materials are added to the material bin 113 through the auxiliary material feeding pipe 116, and after the addition is completed, the discharge port of the material bin is opened to add auxiliary materials to the wet sludge. At the same time, the bacteria agent in the bacteria agent bin 1141 is discharged from the bacteria agent outlet 1142, the aeration mechanism 115 discharges gas through the aeration pipe 1152 to perform aeration, and the wet sludge is subjected to aerobic fermentation to degrade the organic matter in the wet sludge.

[0089] That is, in the first half of the drying area, only the turning drum 1121 rotates, and the wet sludge is turned over by the turning blade 1122. The residence time of the wet sludge in the first half of the drying area is 5-10 days, and the continuous turning and throwing are performed to dry the wet sludge, and the moisture content of the wet sludge is reduced to 55-70%.

[0090] In the second half of the drying area, not only turning and throwing are performed, but also aerobic fermentation is performed, and the turning blade 1122 turns over the wet sludge while the auxiliary materials, bacteria agents and aeration treatment are performed. The sludge stays in the second half for 10-15 days, further reducing the moisture content of the wet sludge to 35-55%.

[0091] Further, the position of the turning and throwing mechanism 11 is detected and the running track of the turning and throwing mechanism 11 is controlled in step two. The position of the turning and throwing mechanism 11 is sensed by the detecting assembly and corresponding instructions are sent by the control system. First, whether the turning and throwing mechanism 11 reaches the inlet device of the inlet area is determined by the first position detecting member. After the first position detecting member senses the turning and throwing mechanism 11, the turning and throwing mechanism 11 is controlled to move linearly to the side of the outlet area. When the second position detecting member detects that the turning and throwing mechanism 11 enters the drying area, the control system controls the turning and throwing mechanism 11 to increase the rotating speed of the turning and throwing roller 1121 and to decrease the moving speed of the second track 132. When the third position detecting member detects that the turning and throwing mechanism 11 enters the outlet area, the control system controls the turning and throwing mechanism 11 to decrease the rotating speed of the turning and throwing roller 1121 and to increase the moving speed of the second track 132. When the fourth position detecting member detects that the turning and throwing mechanism 11 enters the outlet area, the second track 132 stops moving and moves to the first track 131 on the other side by one position, and then moves linearly to the inlet area and repeats the above process.

[0092] When the second position detecting member detects that the turning and throwing mechanism 11 enters the drying area, the control system controls the air suction member to suck the water vapor generated during the turning and throwing. When the third position detecting member detects that the turning and throwing mechanism 11 leaves the drying area, the control system controls the air suction member to be closed.

[0093] Further, the fifth position detecting member is arranged on the first track 131 corresponding to the auxiliary material feeding pipe 116. When the turning and throwing mechanism 11 passes the fifth position detecting member, it enters the second half of the drying area. The control system controls the material bin 113 to open, to put auxiliary material into the wet sludge, and controls the bacteria throwing mechanism to throw bacteria agent and the aeration mechanism to aerate at the same time. The bottom of the material bin 113 is provided with a gravity detecting member. When the turning and throwing mechanism 11 reaches the fifth position detecting member, it is judged whether the weight of the auxiliary material in the material bin 113 is enough. If the weight is not enough, the turning and throwing mechanism 11 is controlled to stop, and enough auxiliary material is added into the material bin 113 through the auxiliary material feeding pipe 116. Then the turning and throwing mechanism 11 continues to move to the side of the outlet area.

[0094] In step three, the dried sludge is discharged after the wet sludge is dried.

[0095] Under the action of the turning and throwing mechanism 11, the sludge enters the outlet groove 31 and is broken under the action of the spiral roller 32, and then is discharged from the outlet.

[0096] In this step, the weight of the sludge in the outlet groove 31 is detected by the gravity detecting member. When the weight reaches a specified value, the control system opens the outlet to start discharging the sludge.

[0097] Obviously, the above embodiments are merely example for clearly illustrating but not limitation 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 can not be enumerated. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. A sludge drying system, characterized in that, include: A sludge solar drying device, comprising: A turning and turning mechanism (11) is set in the drying area. The turning and turning mechanism (11) is used to turn and turn wet sludge in the drying area. The turning and turning mechanism (11) includes: a machine body (111) and a turning and turning roller (112). The turning and turning roller (112) is rotatably set on the machine body (111). A hopper (113) is also set above the turning and turning roller (112). A bacteria-throwing mechanism (114) and an aeration mechanism (115) are set on the turning and turning roller (112). The aeration mechanism (115) includes an air supply component, a gas pipe (1151) and an aeration pipe (1152) connected in sequence. The air supply component is disposed on the turning drum (1121), and the gas pipe (1151) extends from the turning drum (1121) to the outer convex surface of the turning blade (1122). The turning blade (1122) is provided with a plurality of aeration pipes (1152). The aeration pipes (1152) are located on the concave surface of the turning blade (1122). The aeration pipes (1152) are needle-shaped and have a hollow structure. As the turning blade (1122) rotates, the aeration pipes (1152) can simultaneously crush the sludge during the aeration process. The spore-throwing mechanism (114) includes an inoculant chamber (1141) and an inoculant outlet (1142) that are interconnected. The inoculant chamber (1141) is disposed inside the spore-throwing drum (1121), and the inoculant outlet (1142) is formed on the side wall of the spore-throwing drum (1121). An exhaust mechanism (12) is provided in the drying area, and the exhaust mechanism (12) is used to remove the water vapor evaporated from the wet sludge; It also includes a sludge inlet device, a sludge outlet device, and a control system. The drying area is divided into a sludge inlet area, a drying area, and a sludge outlet area along the sludge drying treatment direction. The sludge inlet device is located at the end of the sludge inlet area away from the sludge outlet area, and the sludge outlet device is located at the end of the sludge outlet area away from the sludge inlet area. The sludge solar drying device extends from the sludge inlet area to the sludge outlet area. The control system is used to control the operation of the sludge drying system. It also includes a position detection component, which is electrically connected to the control system. The position detection component is used to detect the position of the turning and threshing mechanism (11). The position detection component includes a first position detection element, a second position detection element, a third position detection element, and a fourth position detection element. The first position detection element is located at the mud inlet device, the second position detection element is located at the junction of the mud inlet area and the drying area, the third position detection element is located at the junction of the drying area and the mud outlet area, and the fourth position detection element is located at the mud outlet device. The position of the turning and threshing mechanism (11) is detected in real time by the first position detection element, the second position detection element, the third position detection element, and the fourth position detection element, thereby accurately controlling the rotation speed of the turning and threshing drum (1121) in the turning and threshing mechanism (11) and the moving speed of the turning and threshing mechanism (11). The auxiliary material feed pipe (116) is located in the middle of the drying zone, and a fifth position detection element is provided on the first track (131) corresponding to the position of the auxiliary material feed pipe (116).

2. The sludge drying system according to claim 1, characterized in that, The exhaust mechanism (12) includes a plurality of air extraction structures, which are arranged along the sludge drying treatment direction and located on at least one side of the drying area.

3. The sludge drying system according to claim 2, characterized in that, Also includes: The track mechanism (13) is located in the drying area, and the turning and throwing mechanism (11) is located on the track mechanism (13) and can move along the track mechanism (13).

4. The sludge drying system according to claim 3, characterized in that, The air extraction structure is mounted on the track mechanism (13).

5. The sludge drying system according to claim 4, characterized in that, The air extraction structure includes an air extraction port (121) and an air extraction component. A plurality of the air extraction ports (121) are spaced apart on the track mechanism (13) along the sludge drying treatment direction, and the air extraction component is provided inside the air extraction port (121).

6. The sludge drying system according to claim 3, characterized in that, The exhaust mechanism (12) further includes an exhaust assembly, which is connected to the air extraction structure.

7. The sludge drying system according to claim 6, characterized in that, The exhaust assembly includes a plurality of exhaust pipes (122), the inlet end of each exhaust pipe (122) being connected to one of the extraction structures, and the outlet end of the exhaust pipe (122) being located outside the drying area.

8. The sludge drying system according to claim 7, characterized in that, The exhaust pipe (122) is located below the drying area and extends in a direction perpendicular to the sludge drying process.

9. The sludge drying system according to claim 7, characterized in that, An odor treatment device (123) is provided at the outlet end of the exhaust pipe (122).

10. The sludge drying system according to any one of claims 3-9, characterized in that, The track mechanism (13) includes: two first tracks (131) and a second track (132), the two first tracks (131) are spaced apart and the first tracks (131) are arranged along the sludge drying treatment direction, the air extraction structure is arranged on the first track (131), the two ends of the second track (132) are slidably connected to the two first tracks (131) respectively, and the turning and throwing mechanism (11) is slidably arranged on the second track (132).

11. The sludge drying system according to claim 1, characterized in that, The mud feeding device includes: a mud feeding component (21), a mud feeding track (22), a mud scraper (23), and a limiting component (24). The mud feeding component (21) is disposed at one end of the mud feeding track (22), the mud scraper (23) is slidably disposed on the mud feeding track (22), and the limiting component (24) is disposed at the other end of the mud feeding track (22).

12. The sludge drying system according to claim 11, characterized in that, The sludge feeding device also includes a material detection element, which is disposed on the limiting member (24). The material detection element is electrically connected to the control system and is used to detect whether the wet sludge covers the sludge feeding track (22).

13. The sludge drying system according to claim 1, characterized in that, The mud discharge device includes a mud discharge trough (31) and a spiral roller (32), wherein the spiral roller (32) is rotatably disposed in the mud discharge trough (31), and one end of the mud discharge trough (31) is a mud discharge port.

14. The sludge drying system according to claim 13, characterized in that, The bottom of the sludge discharge tank (31) is provided with a gravity detection element, which is electrically connected to the control system. The gravity detection element is used to detect the weight of the dried sludge in the sludge discharge tank (31).

15. A sludge drying method, applied to the sludge drying system according to any one of claims 11-14, characterized in that, Includes the following steps: Lay the wet sludge discharged from the mud inlet (21); The wet sludge is turned over and transported along the direction of sludge drying treatment; After the wet sludge has dried, the dried sludge is discharged.

16. The sludge drying method according to claim 15, characterized in that, The step of turning and transporting the wet sludge along the direction of sludge drying treatment also includes detecting the position of the turning mechanism (11) and controlling the running trajectory of the turning mechanism (11).

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