Hot air sludge dewatering system

Abstract

The hot air sludge dewatering system comprises a hot air generating part and a sludge conveying part, the hot air generating part comprises a shell, a plurality of heaters and an air feeder, the shell is provided with a plurality of heating cavities, the heaters are arranged in the heating cavities in a one-to-one correspondence mode, and the air feeder is arranged in the shell. The air feeder is used for introducing air into the multiple heating cavities, the heater is used for exchanging heat with the air introduced into the heating cavities, and an outlet of each heating cavity is connected with an inlet of an air supply pipe; the sludge conveying component comprises a conveying frame and a conveying belt, the conveying belt is movably arranged on the conveying frame and used for conveying sludge, the conveying belt is provided with an air supply hole penetrating through the conveying belt, at least part of the air supply pipe is located below the conveying belt, and an outlet of the air supply pipe faces the conveying belt. Therefore, according to the hot air sludge dewatering system, sludge dewatering is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge dewatering, and particularly relates to a hot air sludge dewatering system. BACKGROUND

[0002] Sludge dewatering treatment is an important link of sewage treatment, through physical, chemical or mechanical means, the excess water in the sludge is removed, the sludge volume is reduced, and the sludge solid content is improved. In terms of dewatering efficiency, it is difficult to quickly separate water from sludge by simply relying on physical extrusion or simple filtration. This results in a high water content of the treated sludge, and the subsequent treatment cost is greatly increased. In the related art, the sludge treated by the dewatering equipment still needs to consume a large amount of energy for secondary drying treatment, which increases the operation cost and resource consumption. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes a hot air sludge dewatering system.

[0004] The hot air sludge dewatering system of the present application comprises: A hot air generating component, the hot air generating component comprises a shell, a plurality of heaters and a blower, the shell has a plurality of heating cavities, a plurality of the heaters are arranged in the plurality of heating cavities one by one, the blower is used to pass air into the plurality of heating cavities, the heaters are used to exchange heat with the air passing into the heating cavities, and the outlet of the heating cavity is connected with the inlet of the air supply pipe. A sludge conveying component, the sludge conveying component comprises a conveying frame and a conveying belt, the conveying belt is movably arranged on the conveying frame, the conveying belt is used to convey sludge, the conveying belt has an air supply hole penetrating therethrough, at least part of the air supply pipe is located below the conveying belt, and the outlet of the air supply pipe faces the conveying belt.

[0005] Therefore, the hot air sludge dewatering system according to the present application facilitates sludge dewatering.

[0006] In some embodiments, the plurality of heating cavities are arranged in sequence in a first direction, the shell has a first air inlet, the blower is arranged at the first air inlet of the shell, and the first air inlet is opened on one side of the shell in the first direction.

[0007] In some embodiments, the shell has a mixing cavity, the inlet of the mixing cavity is connected with at least part of the plurality of heating cavities, and the outlet of the mixing cavity is connected with the inlet of the air supply pipe.

[0008] In some embodiments, the hot air generating component and the sludge conveying component are arranged in the second direction, the length direction of the sludge conveying component is the first direction, and any two of the first direction, the second direction and the up-down direction are perpendicular to each other. The outlet of the mixing cavity is arranged on the side of the shell adjacent to the sludge conveying component in the second direction.

[0009] In some embodiments, a plurality of partitions are arranged in the first direction in the shell, and the plurality of partitions divide the shell into a plurality of heating cavities, the top of the partition is spaced apart from the inner wall of the shell and defines the inlet of the heating cavity, the outlet of the heating cavity is located at the bottom of the heating cavity, and the mixing cavity is located below the heating cavity. The outer surface of each heater is provided with a plurality of heat exchange fins.

[0010] In some embodiments, the outer surface of the heater is cylindrical, the heat exchange fins are arranged around the outer circumferential side of the heater, and the plurality of heat exchange fins are arranged in the axial direction of the heater; and / or The outer surface of the heat exchange fin is coated with a high-temperature resistant coating, and the partition is made of ceramic material.

[0011] In some embodiments, the shell has a plurality of purge holes, the purge holes are in communication with the heating cavities, and a plurality of blowers are arranged on the shell, the outlets of the blowers are in communication with the purge holes.

[0012] In some embodiments, the air supply pipe is a plurality of air supply pipes, each air supply pipe is provided with an electric regulating valve at the inlet, and the electric regulating valve is used to adjust the exhaust flow of the air supply pipe. The air blower is a variable frequency air blower. The conveying frame is provided with a humidity sensor and a temperature sensor, the humidity sensor is used to monitor the temperature of the sludge surface, and the temperature sensor is used to monitor the temperature of the sludge surface.

[0013] In some embodiments, the conveying frame is provided with a plurality of material turning devices above the conveying belt, the plurality of material turning devices are arranged in the length direction of the conveying belt, the material turning device comprises a driver and a spiral blade, and the driver can drive the spiral blade to rotate.

[0014] In some embodiments, the outlet of the sludge conveying component is provided with a sludge collection box, the bottom of the sludge collection box is provided with a weighing sensor, and the weighing sensor is used to monitor the mass change of the dewatered sludge in real time. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1is a schematic diagram of a hot air sludge dewatering system according to an embodiment of the present application.

[0016] Figure 2 is a schematic diagram of a hot air generating component according to an embodiment of the present application.

[0017] Figure 3 is a schematic diagram of a sludge conveying component according to an embodiment of the present application.

[0018] Reference Signs: 1, hot air generating component, 11, housing, 12, heater, 13, heating cavity, 14, mixing cavity, 15, partition, 16, heat exchange fin, 17, first air inlet; 2, sludge conveying component, 21, conveying frame, 22, conveying belt, 23, material turning device. DETAILED DESCRIPTION

[0019] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0020] A hot air sludge dewatering system according to an embodiment of the present application is described below with reference to the accompanying drawings. As shown in Figures 1 to 3 , the hot air sludge dewatering system according to an embodiment of the present application comprises a hot air generating component 1 and a sludge conveying component 2.

[0021] The hot air generating component 1 comprises a housing 11, a plurality of heaters 12 and a blower. The housing 11 has a plurality of heating cavities 13, the plurality of heaters 12 are arranged in the plurality of heating cavities 13 one by one, and the blower is used to pass air into the plurality of heating cavities 13. The heaters 12 are used to exchange heat with the air passing into the heating cavities 13. The outlet of the heating cavity 13 is connected to the inlet of the air supply pipe. In this way, after the blower is used to pass air into the plurality of heating cavities 13, the air in the heating cavities 13 can be heated by the plurality of heaters 12, and then discharged from the housing 11 and into the air supply pipe to dewater the sludge. By arranging a plurality of heating cavities 13 and arranging a heater 12 in each heating cavity 13, the heating effect can be improved, and the fault tolerance can be improved. When one or more of the plurality of heaters 12 is damaged, the remaining heaters 12 can be used to heat the air, thereby improving the stability of the sludge dewatering. For example, the heater 12 is an electric heater. Also for example, the heater 12 is a heat exchanger and uses boiler steam or boiler flue gas as a heat source.

[0022] As shown in Figure 1 and Figure 2As shown in some embodiments, the plurality of heating cavities 13 are arranged in sequence in the first direction, the housing 11 has a first air inlet 17, and an air blower is arranged at the first air inlet 17 of the housing 11, and the first air inlet 17 is opened in the first direction on one side of the housing 11. In this way, the air supply can be sequentially introduced into the plurality of heating cavities 13 in the first direction, so as to sequentially supply air to the plurality of heating cavities 13, and the air supply temperature of the heating cavities 13 located downstream can be high, thereby improving the heating rate of the heating cavities 13 located downstream.

[0023] As shown in some embodiments, the plurality of heating cavities 13 are arranged in sequence in the first direction, the housing 11 has a first air inlet 17, and an air blower is arranged at the first air inlet 17 of the housing 11, and the first air inlet 17 is opened in the first direction on one side of the housing 11. In this way, the air supply can be sequentially introduced into the plurality of heating cavities 13 in the first direction, so as to sequentially supply air to the plurality of heating cavities 13, and the air supply temperature of the heating cavities 13 located downstream can be high, thereby improving the heating rate of the heating cavities 13 located downstream. Figure 2 As shown in some embodiments, the plurality of heating cavities 13 are arranged in sequence in the first direction, the housing 11 has a first air inlet 17, and an air blower is arranged at the first air inlet 17 of the housing 11, and the first air inlet 17 is opened in the first direction on one side of the housing 11. In this way, the air supply can be sequentially introduced into the plurality of heating cavities 13 in the first direction, so as to sequentially supply air to the plurality of heating cavities 13, and the air supply temperature of the heating cavities 13 located downstream can be high, thereby improving the heating rate of the heating cavities 13 located downstream.

[0024] Figure 1 As shown in some embodiments, the plurality of heating cavities 13 are arranged in sequence in the first direction, the housing 11 has a first air inlet 17, and an air blower is arranged at the first air inlet 17 of the housing 11, and the first air inlet 17 is opened in the first direction on one side of the housing 11. In this way, the air supply can be sequentially introduced into the plurality of heating cavities 13 in the first direction, so as to sequentially supply air to the plurality of heating cavities 13, and the air supply temperature of the heating cavities 13 located downstream can be high, thereby improving the heating rate of the heating cavities 13 located downstream. Figure 3 As shown in some embodiments, the plurality of heating cavities 13 are arranged in sequence in the first direction, the housing 11 has a first air inlet 17, and an air blower is arranged at the first air inlet 17 of the housing 11, and the first air inlet 17 is opened in the first direction on one side of the housing 11. In this way, the air supply can be sequentially introduced into the plurality of heating cavities 13 in the first direction, so as to sequentially supply air to the plurality of heating cavities 13, and the air supply temperature of the heating cavities 13 located downstream can be high, thereby improving the heating rate of the heating cavities 13 located downstream.

[0025] As shown in some embodiments, the plurality of heating cavities 13 are arranged in sequence in the first direction, the housing 11 has a first air inlet 17, and an air blower is arranged at the first air inlet 17 of the housing 11, and the first air inlet 17 is opened in the first direction on one side of the housing 11. In this way, the air supply can be sequentially introduced into the plurality of heating cavities 13 in the first direction, so as to sequentially supply air to the plurality of heating cavities 13, and the air supply temperature of the heating cavities 13 located downstream can be high, thereby improving the heating rate of the heating cavities 13 located downstream.

[0026] ​In some embodiments, the shell 11 is provided with a plurality of partitions 15 spaced apart in the first direction, and the plurality of partitions 15 divide the shell 11 into a plurality of heating cavities 13. The top of the partition 15 is spaced apart from the inner wall of the shell 11 and defines the entrance of the heating cavity 13. The outlet of the heating cavity 13 is located at the bottom of the heating cavity 13, and the mixing cavity 14 is located below the heating cavity 13. In this way, hot air can enter the plurality of heating cavities 13 from above in turn, and then pass through the heater 12 from the top of the heating cavity 13 and enter the mixing cavity 14.

[0027] In some embodiments, the outer surface of each heater 12 is provided with a plurality of heat exchange fins 16. Specifically, the outer surface of the heater 12 is cylindrical, and the heat exchange fins 16 are annularly arranged on the outer circumferential side of the heater 12 and are spaced apart along the axial direction of the heater 12, thereby improving the heating efficiency. For example, the heat exchange fins 16 are annular, or the heat exchange fins 16 extend spirally.

[0028] In some embodiments, the outer surface of the heat exchange fin 16 is coated with a high-temperature-resistant coating, and the partition 15 is made of ceramic material. In this way, the high-temperature-resistant coating can withstand the high temperature of the hot air, thereby improving the service life. For example, the partition 15 is provided with a flow guide fin to guide the flow direction of the hot air. The air supply pipe is connected to the outlet of the mixing cavity 14 through a flexible connecting pipe made of high-temperature-resistant silicone material, which can adapt to the thermal expansion and contraction caused by the change in temperature of the hot air.

[0029] In some embodiments, the shell 11 has a plurality of purge holes communicating with the heating cavities 13, and the shell 11 is provided with a plurality of air blowers, and the outlets of the air blowers communicate with the purge holes. In this way, the air blower can blow air into the heating cavities 13 through the purge holes, thereby cleaning the dust in the heating cavities 13.

[0030] In some embodiments, the air supply fan is a variable frequency fan. The conveying frame 21 is provided with a humidity sensor and a temperature sensor. The humidity sensor is used to monitor the temperature of the sludge surface, and the temperature sensor is used to monitor the temperature of the sludge surface.

[0031] In some embodiments, the conveying frame 21 is provided with a plurality of material turning devices 23 located above the conveying belt 22, and the plurality of material turning devices 23 are spaced apart along the length direction of the conveying belt 22. The material turning device 23 includes a driver and a spiral blade, and the driver can drive the spiral blade to rotate. Specifically, the spiral blade is arranged at a predetermined position above the conveying belt 22, so that when the sludge is stacked too high on the conveying belt 22, the driver drives the spiral blade to rotate to scatter and displace the sludge.

[0032] In some embodiments, a sludge collection tank is arranged at the outlet of the sludge conveying component 2, and a weighing sensor is arranged at the bottom of the sludge collection tank, which is used to monitor the mass change of the dewatered sludge in real time. In this way, the dried sludge can be weighed by the weighing sensor to monitor the mass change of the dewatered sludge in real time.

[0033] The hot air sludge dewatering system according to the embodiment of the present application comprises a parameter regulation unit composed of a central controller and a plurality of execution elements. The central controller is connected with a sensing and monitoring network through a wireless communication module, receives data collected by the sensing and monitoring network, and outputs regulation instructions to the execution elements. The central controller is built-in with an algorithm model, which dynamically calculates the optimal temperature, humidity and flow parameters of the hot air according to the data of the sensing and monitoring network, and converts the results into regulation instructions and sends them to the execution elements. The execution elements include an electric regulating valve for regulating the flow of hot air and a variable frequency fan for adjusting the speed to change the pressure of the hot air according to the instructions of the central controller. The parameter regulation unit further comprises a fault diagnosis module, which analyzes the data of the sensing and monitoring network to determine whether the system is in an abnormal state, such as excessively high temperature or excessively low humidity of the hot air. When an abnormality is detected, the fault diagnosis module will issue an alarm signal and adjust the relevant parameters through the central controller to restore normal operation. The sensing and monitoring network is arranged on the conveying frame 21 and comprises a humidity sensor, a temperature sensor and a flow meter. The humidity sensor and the temperature sensor are respectively installed above and below the conveying frame. The humidity sensor adopts a capacitive principle and can quickly respond to the change of the moisture on the surface of the sludge. The temperature sensor adopts a thermocouple structure and has high sensitivity and anti-interference ability. The flow meter is installed at the first air inlet 17 and is used to monitor the air flow entering the system. Its measurement accuracy is calibrated to ensure data accuracy. In addition, the sensing and monitoring network further comprises an environmental sensor installed outside the sludge conveying component 2 for monitoring the changes of the environmental temperature and humidity. The data of the environmental sensor is introduced into the algorithm model of the central controller as one of the reference bases for dynamically adjusting the parameters of the hot air. The sludge conveying component 2 adopts a multi-stage conveyor belt structure, and a material turning device 23 is arranged between each stage of the conveyor belt. The material turning device 23 uniformly disperses the sludge through rotating blades to increase the contact area with the hot air.

[0034] The running speed of each stage of the conveyor belt can be independently adjusted, and the material turning device 23 between each stage of the conveyor belt is driven by a servo motor. The speed of the servo motor is controlled by the parameter regulation unit. The rotating blades of the material turning device 23 are designed in an arc shape, and the surface of the blades is provided with an anti-sticking coating to prevent the sludge from accumulating on the blades. The end of the sludge conveying component 2 is provided with a sludge collection tank, and a weighing sensor is installed at the bottom of the sludge collection tank. The weighing sensor is used to monitor the mass change of the dewatered sludge in real time. The data of the weighing sensor is transmitted to the central controller in a wired manner as an important basis for system performance evaluation.

[0035] In actual operation, the sludge enters the system from the inlet of the sludge conveying component 2 and is gradually transported forward with the operation of the multi-stage conveyor belt. The turner 23 is driven by a servo motor and rotates at a preset speed to uniformly disperse the sludge, allowing the sludge to fully contact with the hot air. The hot air generating component 1 generates hot air according to the instructions of the central controller, and the hot air is uniformly distributed in the mixing chamber 14 and then enters the sludge conveying component 2 to exchange heat with the sludge to achieve the dewatering effect. The sensing monitoring network collects data such as the surface humidity, temperature of the sludge, and hot air flow in real time and transmits the data to the central controller. The central controller calculates the optimal hot air parameters according to the built-in algorithm model and adjusts the hot air temperature, humidity, and flow through the execution element to adapt to the needs of different sludge characteristics. At the same time, the fault diagnosis module continuously monitors the system operation state and immediately issues an alarm and adjusts the relevant parameters once an abnormality is found, ensuring stable operation of the system. The end of the sludge conveying component 2 is provided with a sludge collection box, and the dewatered sludge falls into the collection box, and the weighing sensor monitors the change of the sludge quality in real time and transmits the data to the central controller. The central controller evaluates the dewatering performance of the system according to the weighing data and further optimizes the hot air parameter control strategy in combination with the data of the sensing monitoring network. Through the cooperative work of the above-mentioned modules, the whole system realizes precise control of the hot air parameters, significantly improves the sludge dewatering efficiency and stability, reduces energy consumption, and meets the needs of the modern sludge treatment field for efficient and intelligent dewatering technology.

[0036] Therefore, the hot air sludge dewatering system according to the embodiment of the present application is convenient for sludge dewatering.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship 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 indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0039] In the present application, unless specifically defined otherwise, the terms "mount", "connected", "connecting", "fixed", "unfixed", and the like should be construed broadly and can include fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or communication connections between each other; direct connections, or indirect connections via an intermediate medium; or internal communication between two elements or interaction between two elements. Unless otherwise specifically defined, the above terms can be construed in the context of the present application.

[0040] In the present application, unless specifically defined otherwise, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features via an intermediate medium. Moreover, the first feature "above", "over", and "on" the second feature can be directly above or obliquely above the second feature, or can simply mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "under", and "under" the second feature can be directly below or obliquely below the second feature, or can simply mean that the first feature is lower than the second feature in horizontal height.

[0041] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0042] Although embodiments of the present application have been shown and described above, it is to be understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present application.

Claims

1. A hot air sludge dewatering system, characterized by, The hot air generating component comprises a shell, a plurality of heaters and a blower, the shell has a plurality of heating cavities, one-to-one correspondence of a plurality of the heaters is arranged in a plurality of the heating cavities, the blower is used for air into a plurality of the heating cavities, the heater is used for heat exchange with the air into the heating cavity, the outlet of the heating cavity is connected with the inlet of the air supply pipe; The sludge conveying component comprises a conveying frame and a conveying belt, the conveying belt is movably arranged on the conveying frame, the conveying belt is used for conveying sludge, the conveying belt has a blowing hole penetrating through it, at least part of the air supply pipe is located below the conveying belt, and the outlet of the air supply pipe faces the conveying belt. A plurality of the heating cavities are arranged in sequence in the first direction, the shell has a first air inlet, the blower is arranged at the first air inlet of the shell, and the first air inlet is opened on one side of the shell in the first direction.

2. The hot flue sludge dewatering system according to claim 1, wherein The shell has a mixing cavity, the inlet of the mixing cavity is connected with at least part of a plurality of the heating cavities, and the outlet of the mixing cavity is connected with the inlet of the air supply pipe.

3. The hot flue sludge dewatering system according to claim 2, wherein 4. The hot air sludge dewatering system according to claim 3, wherein The hot air generating component and the sludge conveying component are arranged in the second direction, the length direction of the sludge conveying component is the first direction, and any two of the first direction, the second direction and the up-down direction are perpendicular to each other; The outlet of the mixing cavity is opened on one side of the shell adjacent to the sludge conveying component in the second direction.

5. The hot air sludge dewatering system according to claim 4, wherein A plurality of partitions are arranged in the first direction in the shell, a plurality of the partitions divide the shell into a plurality of the heating cavities, the top of the partition is spaced apart from the inner wall surface of the shell and defines the inlet of the heating cavity, the outlet of the heating cavity is located at the bottom of the heating cavity, and the mixing cavity is located below the heating cavity; The outer surface of each of the heaters is provided with a plurality of heat exchange fins. The outer surface of the heater is columnar, the heat exchange fins are annularly arranged on the outer circumferential side of the heater, and a plurality of the heat exchange fins are arranged in the axial direction of the heater; and / or 6. The hot flue sludge dewatering system of claim 5, wherein, The outer surface of the heat exchange fin is coated with a high-temperature-resistant coating, and the partition is made of ceramic material. The shell has a plurality of purge holes, the purge holes are communicated with the heating cavities, a plurality of air blowers are arranged on the shell, and the outlets of the air blowers are communicated with the purge holes.

7. The hot flue sludge dewatering system according to any one of claims 1 to 5, characterized in that 8. The hot air sludge dewatering system according to claim 1, wherein The air supply pipe is a plurality of, an electric regulating valve is arranged at the inlet of each of the air supply pipes, and the electric regulating valve is used for adjusting the air flow of the air supply pipe; The blower is a variable frequency blower; The conveying frame is provided with a humidity sensor and a temperature sensor, the humidity sensor is used for monitoring the temperature of the sludge surface, and the temperature sensor is used for monitoring the temperature of the sludge surface. ​ 9. The hot flue sludge dewatering system of claim 1, wherein, The conveying frame is provided with a plurality of material turning devices above the conveying belt, the plurality of material turning devices are arranged at intervals along the length direction of the conveying belt, and each material turning device comprises a driver and a spiral blade.

10. The hot flue sludge dewatering system of claim 1, wherein, The outlet of the sludge conveying component is provided with a sludge collecting tank, and the bottom of the sludge collecting tank is provided with a weighing sensor. The weighing sensor is used for monitoring the mass change of the dewatered sludge in real time.

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