Sludge drying system

Abstract

The utility model relates to the technical field of sludge treatment, and discloses a sludge drying system which comprises a drying bin, an air heater, a main pipe and a connecting pipe. The drying bin is used for containing sludge and provided with at least one air outlet. The air heater is used for generating hot air. And the main pipe is communicated with the air outlet and the air heater. The first end of the connecting pipe is connected and communicated with the main pipe, the second end of the connecting pipe is connected with the air outlet, and the connecting pipe is provided with an overhaul channel which is communicated with the second end. The second end communicated with the drying bin is overhauled through the overhauling channel, so that hot air can be smoothly conveyed to the drying bin, and the sludge drying effect is ensured. Moreover, during maintenance, maintenance can be carried out through the maintenance channel, so that the interference to the sludge drying process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sludge treatment technical field especially, is a kind of sludge drying system. BACKGROUND

[0002] Sludge drying refers to the process of removing most of the water content from sludge by percolation or evaporation, and the purpose of sludge drying is to remove part of the water in wet sludge to meet different disposal requirements. Drying means that a certain amount of heat is transferred to the moisture contained in the material in unit time, usually through heating, ventilation and other means, the water in the sludge is evaporated and separated from the material, and the material without moisture and the evaporated moisture are collected separately. In the related art, the sludge drying device using ventilation means to dry the sludge is prone to sludge blocking the air supply channel during operation, which affects the air volume and thus the sludge drying effect, and is inconvenient to maintain, often requiring production to be stopped for maintenance. SUMMARY

[0003] The technical problem to be solved by the utility model is that in the related art, the sludge drying device is prone to sludge blocking the air supply channel, the sludge drying effect is not good, and maintenance is inconvenient.

[0004] To solve the above technical problems, the utility model provides a sludge drying system, comprising:

[0005] A drying bin for containing sludge, the drying bin is provided with at least one air outlet;

[0006] A hot air machine for generating hot air;

[0007] A mother pipe in communication with the air outlet and the hot air machine;

[0008] A connecting pipe, the first end of the connecting pipe is connected to and in communication with the mother pipe, the second end of the connecting pipe is connected to the air outlet, the connecting pipe is provided with a maintenance passage, and the maintenance passage is in communication with the second end.

[0009] According to one embodiment of the utility model, the axis of the maintenance passage and the axis of the second end are on the same straight line.

[0010] According to one embodiment of the utility model, a maintenance valve is arranged in the maintenance passage.

[0011] According to one embodiment of the utility model, the second end is inserted into the air outlet, the included angle A between the end face of the second end and the axis of the second end is an acute angle, and the end face of the second end faces the bottom of the drying bin.

[0012] According to one embodiment of the present invention, there are multiple air outlets, including an upper air outlet, a middle air outlet, and a lower air outlet. The upper air outlet is located on the top wall of the drying chamber, and the middle air outlet and the lower air outlet are both located on the peripheral wall of the drying chamber. The lower air outlet is closer to the bottom of the drying chamber than the middle air outlet.

[0013] According to one embodiment of the present invention, the distance between the lower air outlet and the bottom of the drying chamber is H, where 0.8m ≤ H ≤ 1m.

[0014] According to one embodiment of the present invention, the sludge drying system further includes a spray tower, and the drying chamber is provided with an exhaust port, which is connected to the spray tower.

[0015] According to one embodiment of the present invention, the exhaust port is located at the top of the drying chamber, and there are multiple upper air outlets, middle air outlets and lower air outlets, with a ratio of 2:2:1.

[0016] According to one embodiment of the present invention, the sludge drying system further includes a temperature sensor and a control device. The temperature sensor is located inside the drying chamber, and the control device is communicatively connected to both the hot air blower and the temperature sensor.

[0017] According to one embodiment of the present invention, the sludge drying system further includes: support columns and a conveying device. The cross-sectional area of ​​the lower chamber of the drying chamber gradually decreases from top to bottom. The conveying device is connected to and communicates with the lower chamber of the drying chamber. The support columns are connected to the outer surface of the drying chamber to support the drying chamber. There are multiple support columns, which are spaced apart along the circumferential direction of the drying chamber.

[0018] This utility model provides a sludge drying system. A maintenance channel allows for the smooth delivery of hot air to the drying chamber at the second end, ensuring effective sludge drying. Furthermore, maintenance can be performed through the maintenance channel, minimizing interference with the sludge drying process. Attached Figure Description

[0019] Figure 1 This is a partial structural schematic diagram of the sludge drying system provided in this embodiment of the utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the drying chamber provided in this embodiment of the utility model.

[0021] Figure 3 This is a schematic diagram of the connecting pipe structure provided in an embodiment of this utility model.

[0022] Figure 4This is one of the side structural schematic diagrams of the drying chamber provided in this embodiment of the utility model.

[0023] Figure 5 This is the second side structural schematic diagram of the drying chamber provided in this embodiment of the utility model.

[0024] Figure 6 This is a schematic diagram of the top structure of the drying chamber provided in this embodiment of the utility model.

[0025] Figure label:

[0026] 110. Drying bin; 1101. Lower bin body; 1102. Upper bin body; 111. Upper air outlet; 112. Middle air outlet; 113. Lower air outlet; 114. Support column; 115. Feed inlet; 116. Conveying device; 117. Exhaust port;

[0027] 120. Main duct; 121. Upper air supply duct; 122. Middle air supply duct; 123. Lower air supply duct;

[0028] 130. Connecting pipe; 131. First end; 132. Second end; 133. Inspection channel; 134. Inspection valve; 140. Hot air blower; 150. Spray tower; 160. Temperature sensor. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] In the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and 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 embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] like Figure 1 and Figure 2 As shown, a sludge drying system according to an embodiment of the present invention includes a drying chamber 110, a hot air blower 140, a main pipe 120, and a connecting pipe 130.

[0034] Specifically, the hot air blower 140 is used to generate hot air. The drying chamber 110 is used to hold sludge, and the drying chamber 110 is provided with at least one air outlet. The main pipe 120 is connected to both the air outlet and the hot air blower 140. The hot air generated by the hot air blower 140 is transported to the air outlet through the main pipe 120, and then to the drying chamber 110 to heat the sludge inside the drying chamber 110 and remove moisture from the sludge. The first end 131 of the connecting pipe 130 is connected to and communicates with the main pipe 120, and the second end 132 of the connecting pipe 130 is connected to the air outlet and communicates with the interior of the drying chamber 110. The connecting pipe 130 is provided with a maintenance passage 133, which communicates with the second end 132. The condition of the second end 132 can be observed through the inspection channel 133. When sludge blocks the second end 132, it can be removed through the inspection channel 133, allowing hot air to be smoothly delivered to the drying chamber 110, ensuring the drying effect. During maintenance, inspections can be carried out through the inspection channel 133, minimizing interference with the drying process.

[0035] According to the sludge drying system of this utility model embodiment, the second end 132 connected to the drying chamber 110 is inspected through the inspection channel 133, so that hot air can be smoothly delivered to the drying chamber 110 to ensure the sludge drying effect. Furthermore, during maintenance, it can be carried out through the inspection channel 133, reducing interference with the sludge drying process.

[0036] like Figure 3As shown, according to some embodiments of the present invention, the axis of the inspection channel 133 is collinear with the axis of the second end 132, thereby facilitating direct observation of the condition of the second end 132 through the inspection channel 133. When there is sludge in the second end 132, a long rod can be used for direct unblocking; the long rod is inserted into the inspection channel 133 to push the sludge out of the second end 132. In some embodiments, an inspection valve 134 is provided in the inspection channel 133 to control the opening or closing of the inspection channel 133; the inspection valve 134 can be a ball valve.

[0037] like Figure 2 and Figure 3 As shown, according to some embodiments of this utility model, the second end 132 is inserted into the air outlet, and the second end 132 is located inside the drying chamber 110. The angle A between the end face of the second end 132 and the axis of the second end 132 is an acute angle, such as... Figure 3 As shown, this increases the surface area of ​​the second end 132 and accelerates the output speed of the hot air. The end face of the second end 132 faces the bottom of the drying chamber 110 so that the hot air delivered to the drying chamber 110 flows toward the sludge, reducing heat loss.

[0038] like Figure 2 As shown, according to some embodiments of the present invention, the sludge drying system further includes: a support column 114 and a conveying device 116, and the cross-sectional area of ​​the lower chamber 1101 of the drying chamber 110 from top to bottom (e.g., ...). Figure 2 The direction shown gradually decreases. In some embodiments, the lower chamber 1101 is a tetrahedral pyramid shape. The conveying device 116 is connected to and communicates with the lower chamber 1101 of the drying chamber 110. Specifically, the conveying device 116 can be connected to the bottom end of the lower chamber 1101 to facilitate the output of the dried sludge. It is understood that the cross-section of the lower chamber 1101 is perpendicular to the vertical direction. The drying chamber 110 is provided with an inlet 115, which is located in the upper chamber 1102 of the drying chamber 110. The inlet 115 can be connected to a screw conveyor to transport the sludge to be dried into the drying chamber 110 through the inlet 115. The support column 114 is connected to the outer surface of the drying chamber 110. The support column 114 is used to connect to the ground to support the drying chamber 110. There are multiple support columns 114, which are spaced apart along the circumferential direction of the drying chamber 110.

[0039] like Figure 2 As shown, according to some embodiments of this utility model, there are multiple air outlets, including an upper air outlet 111, a middle air outlet 112, and a lower air outlet 113. The upper air outlet 111 is located on the top wall of the drying chamber 110, and the middle air outlet 112 and the lower air outlet 113 are both located on the peripheral wall of the drying chamber 110. The middle air outlet 112 can be located in the height direction of the peripheral wall (e.g., ...). Figure 2In the middle of the drying chamber 110 (shown in the vertical direction), the lower air outlet 113 and the middle air outlet 112 are distributed at intervals along the height direction of the drying chamber 110. The lower air outlet 113 is closer to the bottom of the drying chamber 110 than the middle air outlet 112. Hot air can enter the drying chamber 110 from different heights, resulting in more uniform contact between the sludge and the hot air inside the drying chamber 110, improving the sludge drying effect and avoiding poor local sludge drying. More specifically, the upper air outlet 111 is located on the top wall of the drying chamber 110, and the middle air outlet 112 and the lower air outlet 113 are located on the lower chamber body 1101 of the drying chamber 110. The lower air outlet 113 is closer to the bottom of the lower chamber body 1101 than the middle air outlet 112. Figure 2 As shown, in some embodiments, the distance between the lower air outlet 113 and the bottom of the drying chamber 110 is H, 0.8m≤H≤1.0m. For example, H can be 0.8m, 0.9m, 0.95m, 1.0m, etc.

[0040] like Figure 1 , Figures 4 to 6 As shown, the main duct 120 may include an upper air supply duct 121, a middle air supply duct 122, and a lower air supply duct 123. The upper air supply duct 121 is connected to the upper air outlet 111 via a connecting pipe 130, the middle air supply duct 122 is connected to the middle-level air outlet 112 via a connecting pipe 130, and the lower air supply duct 123 is connected to the lower air outlet 113. The upper air supply duct 121, the middle air supply duct 122, and the lower air supply duct 123 may each be a single duct. The upper air supply duct 121 may have multiple branch pipes to connect to multiple upper air outlets 111, the middle air supply duct 122 may have multiple branch pipes to connect to multiple middle-level air outlets 112, and the lower air supply duct 123 may have multiple branch pipes to connect to multiple lower air outlets 113.

[0041] According to some embodiments of this utility model, the sludge drying system further includes a spray tower 150, and the drying chamber 110 is provided with an exhaust port 117, which is connected to the spray tower 150. After the sludge is heated, the water in it evaporates, and harmful gases, dust, etc., are contained in it, forming a mixed gas. The mixed gas is discharged to the spray tower 150 through the exhaust port 117. Inside the spray tower 150, the mixed gas comes into full contact with the spray liquid, which can effectively remove pollutants such as dust and particulate matter from the mixed gas, and at the same time reduce the temperature and humidity of the mixed gas to meet emission standards.

[0042] According to some embodiments of this utility model, exhaust ports 117 are located at the top of the drying chamber 110, and multiple exhaust ports 117 can be provided. There are multiple upper exhaust ports 111, middle exhaust ports 112, and lower exhaust ports 113, with a ratio of 2:2:1, reducing the probability of hot air being directly discharged from the exhaust ports 117 and improving sludge drying efficiency. For example, there can be four upper exhaust ports 111, which can be arranged in a matrix; four middle exhaust ports 112, which are spaced apart along the circumferential direction of the lower chamber 1101; and two lower exhaust ports 113. Thus, hot air can be evenly input from multiple directions of the drying chamber 110, resulting in more complete contact between the hot air and the sludge.

[0043] According to some embodiments of this utility model, the sludge drying system further includes a temperature sensor 160 and a control device. The temperature sensor 160 is located inside the drying chamber 110 and is used to detect the temperature inside the drying chamber 110. Multiple temperature sensors 160 can be distributed at intervals along the height of the drying chamber 110 to improve the accuracy of temperature detection within the drying chamber 110. The control device is communicatively connected to both the hot air blower 140 and the temperature sensors 160. The control device is used to acquire measurement results from the temperature sensors 160 and to control the output airflow and heat power of the hot air blower 140. The output airflow and heat power of the hot air blower 140 can be adjusted according to the temperature detected by the temperature sensor 160 inside the drying chamber 110 to improve the sludge drying effect and reduce energy waste. When the temperature inside the drying chamber 110 is detected to be higher than the upper threshold, the output air volume and heat power of the hot air blower 140 can be reduced to lower the temperature and air volume of the hot air delivered to the drying chamber 110 and reduce heat loss. When the temperature inside the drying chamber 110 is detected to be lower than the lower threshold, the output air volume and heat power of the hot air blower 140 can be increased to increase the temperature and air volume of the hot air delivered to the drying chamber 110 and increase the sludge drying speed.

[0044] Understandably, sludge drying treatment typically includes pretreatment, drying, and post-treatment processes. Pretreatment mainly involves plate and frame filter presses and crushing to improve the sludge's dewatering performance, creating conditions for subsequent drying. For ease of transportation and storage, pretreated sludge is usually in block form. Drying primarily involves heating the pretreated sludge to evaporate the moisture, achieving sludge reduction, stabilization, and harmlessness. The sludge drying system described in this application can be applied to drying processes.

[0045] The working process of this sludge drying system is as follows: Sludge enters the drying chamber 110 through the inlet 115. A hot air blower 140 delivers hot air at a certain temperature into the drying chamber 110 via a main pipe 120, connecting pipe 130, upper air outlet 111, middle air outlet 112, and lower air outlet 113. The hot air comes into full contact with the sludge in the drying chamber 110, causing the moisture in the sludge to evaporate and harmful gases to escape, forming a mixed gas. The mixed gas is then conveyed to the spray tower 150 through the exhaust port 117, where the spray liquid removes pollutants such as dust and particulate matter, and reduces the temperature and humidity of the mixed gas to meet emission standards. The dried sludge is then output through the conveying device 116 to be transported to the next process. When the sludge drying system is under maintenance, the maintenance valve 134 can be opened and the condition of the second end 132 of the connecting pipe 130 can be observed through the maintenance channel 133. When there is sludge residue in the second end 132, a long rod can be inserted into the maintenance channel 133 to push the sludge out of the second end 132. The sludge falls into the drying chamber 110. After the maintenance is completed, the maintenance valve 134 can be closed.

[0046] In summary, this utility model embodiment provides a sludge drying system, which has at least the following features:

[0047] Beneficial effects:

[0048] 1. Maintenance can be carried out through maintenance channel 133 to ensure that hot air is smoothly delivered to the drying chamber 110 and to reduce the interference of maintenance on the sludge drying process;

[0049] 2. Hot air can come into full and even contact with the sludge in the drying chamber 110, improving the sludge drying effect.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate this utility model and are not intended to limit it. It should be pointed out that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A sludge drying system, characterized in that, include: A drying chamber (110) is used to hold sludge, and the drying chamber (110) is provided with at least one air outlet; A hot air blower (140) for generating hot air; The main pipe (120) is connected to both the air outlet and the hot air blower (140); A connecting pipe (130) is provided, the first end (131) of which is connected to and communicates with the main pipe (120), the second end (132) of which is connected to the air outlet, and the connecting pipe (130) is provided with a maintenance channel (133), which communicates with the second end (132).

2. The sludge drying system according to claim 1, characterized in that, The axis of the maintenance channel (133) is on the same straight line as the axis of the second end (132).

3. The sludge drying system according to claim 1, characterized in that, The maintenance channel (133) is equipped with a maintenance valve (134).

4. The sludge drying system according to claim 1, characterized in that, The second end (132) is inserted into the air outlet. The angle A between the end face of the second end (132) and the axis of the second end (132) is an acute angle, and the end face of the second end (132) faces the bottom of the drying chamber (110).

5. The sludge drying system according to claim 1, characterized in that, The air outlets are multiple, including an upper air outlet (111), a middle air outlet (112), and a lower air outlet (113). The upper air outlet (111) is located on the top wall of the drying chamber (110). The middle air outlet (112) and the lower air outlet (113) are both located on the periphery of the drying chamber (110), and the lower air outlet (113) is closer to the bottom of the drying chamber (110) than the middle air outlet (112).

6. The sludge drying system according to claim 5, characterized in that, The distance between the lower air outlet (113) and the bottom of the drying chamber (110) is H, where 0.8m ≤ H ≤ 1m.

7. The sludge drying system according to claim 5, characterized in that, The sludge drying system also includes a spray tower (150), and the drying chamber (110) is provided with an exhaust port (117), which is connected to the spray tower (150).

8. The sludge drying system according to claim 7, characterized in that, The exhaust port (117) is located at the top of the drying chamber (110). There are multiple upper air outlets (111), middle air outlets (112) and lower air outlets (113), and the ratio of their numbers is 2:2:

1.

9. The sludge drying system according to claim 1, characterized in that, The sludge drying system also includes a temperature sensor (160) and a control device. The temperature sensor (160) is located inside the drying chamber (110), and the control device is communicatively connected to both the hot air blower (140) and the temperature sensor (160).

10. The sludge drying system according to claim 1, characterized in that, The sludge drying system further includes: support columns (114) and a conveying device (116). The cross-sectional area of ​​the lower chamber (1101) of the drying chamber (110) gradually decreases from top to bottom. The conveying device (116) is connected to the lower chamber (1101) of the drying chamber (110) and communicates with the drying chamber (110). The support columns (114) are connected to the outer surface of the drying chamber (110) to support the drying chamber (110). There are multiple support columns (114), which are spaced apart along the circumferential direction of the drying chamber (110).

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