A sludge moisture content measuring device

Abstract

The utility model discloses a kind of sludge moisture content measuring devices, mainly by crushing bin, sampling cylinder, drying bin and aggregate bin are composed. Crushing mechanism is equipped in crushing bin, for dispersing sludge, its top is equipped with plug valve. Two sampling grooves are symmetrically opened in the rotary sampling disc in sampling cylinder, realize continuous on-line repeated sampling. Electric heating wire is built-in in drying bin and is connected vacuum pump, sludge drying can be accelerated;Real-time monitoring dry sludge weight by weighing sensor, calculate moisture content in combination with controller. After drying, material return mechanism pushes sludge to blanking gap, and falls into lower aggregate bin through blanking passage. The device can quickly and accurately determine the moisture content of sludge after dewatering, which helps to adjust the operating parameters of sludge dewatering machine in time and improve the processing efficiency.

Description

Technical Field

[0001] This utility model relates to a sludge moisture content measuring device, belonging to the field of sludge treatment technology. Background Technology

[0002] Wastewater treatment plants generate a large amount of excess sludge during the wastewater treatment process. The moisture content of this excess sludge is generally over 99%. After being concentrated in a sludge thickening tank, the moisture content of the sludge is generally 95-99%. Due to the high moisture content of the sludge, subsequent disposal is difficult, and it needs to be dewatered by a sludge dewatering machine to reduce the moisture content of the dewatered sludge to 70-80%.

[0003] Commonly used sludge dewatering machines include centrifugal dewatering machines, belt filter presses, and plate and frame filter presses. Their principle is to use centrifugal force or pressure to separate the sludge and water phases in the sludge through a physical process. The core objective is to reduce the sludge volume by lowering its moisture content (typically from 95%-99% to 70%-80%). During the sludge dewatering process, flocculants (such as PAM and PAC) need to be added to the sludge to improve dewatering performance. Since sludge dewatering machines are continuously fed, the moisture content of the dewatered sludge needs to be frequently monitored to adjust the machine's operating parameters. Currently, the moisture content of dewatered sludge often requires manual sampling and drying in a laboratory, which is time-consuming, inefficient, and requires repeated manual operation for each sampling. Utility Model Content

[0004] The purpose of this invention is to provide a sludge moisture content measuring device that can perform online repeated sampling and quickly measure the moisture content of dewatered sludge, so as to facilitate timely adjustment of the operating parameters of the sludge dewatering machine and improve the processing efficiency of the centrifugal dewatering machine.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A sludge moisture content measuring device includes a crushing chamber, a gate valve installed at the top opening of the crushing chamber, and a crushing mechanism for dispersing sludge installed inside the crushing chamber. A sampling cylinder is installed below the crushing chamber, and a sampling disk is rotatably installed inside the sampling cylinder. Two sampling slots are symmetrically opened on the sampling disk. A drying chamber is set below the sampling cylinder. A weighing sensor is installed on the bottom plate of the drying chamber and a weighing mechanism connected to the controller is installed. An electric heating wire is arranged around the drying chamber located above the weighing mechanism. The drying chamber is connected to a vacuum pump through a pipe and multiple air vents are opened on the side wall of the drying chamber. Multiple material discharge channels are formed between the bottom plate of the drying chamber and the drying chamber. A material discharge gap is also formed between the weighing plate on the weighing sensor in the weighing mechanism and the drying chamber. A material discharge mechanism is set in the sampling chamber at the bottom of the drying chamber, between the heating wire and the weighing mechanism, to push the dried sludge into the material discharge gap. A detachable collection bin is installed below the drying chamber to collect sludge that falls through the material drop gap and material drop channel.

[0006] Preferably, the crushing mechanism includes a bearing plate horizontally fixed inside the crushing chamber by a number of support rods, a crushing motor with an actuation shaft extending above the bearing plate is installed at the bottom of the bearing plate, and a crushing cutter head is installed at the end of the actuation shaft of the crushing motor; the dispersed sludge falls through the gap between the support rods.

[0007] Preferably, the diameter of the sampling cylinder is greater than the length and width of the crushing chamber, and the sampling disc fits against the inner wall of the sampling cylinder; a geared motor is installed on the outer wall of one end of the sampling cylinder, and the actuator of the geared motor is detachably connected to the central shaft fixedly installed inside the sampling disc, so that the sampling disc can be rotated by the geared motor.

[0008] Preferably, guide blocks are symmetrically arranged on the inner bottom of the crushing chamber to guide the crushed sludge into the sampling tank, and the bottom of the guide blocks forms an arc surface that fits the sampling plate.

[0009] Preferably, guide blocks are symmetrically arranged on the inner top of the drying chamber to restrict the direction of sludge falling from the sampling plate after crushing, and the top of the guide blocks forms an arc surface that is tangent to the sampling plate.

[0010] Preferably, a guide bucket for guiding the crushed sludge to the weighing mechanism is provided at the bottom of the guide block.

[0011] Preferably, the unloading mechanism includes a telescopic device installed outside the drying chamber. The actuating shaft of the telescopic device is located above the weighing plate of the weighing mechanism, and a pusher plate is installed at the end of the actuating shaft. When the telescopic device drives the pusher plate to move laterally, the bottom surface of the pusher plate is in contact with the top surface of the bearing plate.

[0012] Preferably, the bottom plate of the drying chamber is connected to the side wall of the drying chamber by multiple connecting rods.

[0013] Preferably, the collection bin and the drying bin are connected by multiple locking buckles, with the fixed part of the buckle installed on the outer wall of the drying bin and the movable part of the buckle correspondingly installed on the outer wall of the collection bin.

[0014] The beneficial effects of this utility model are as follows: 1. It can achieve continuous sampling and measurement, and quickly determine the moisture content of dewatered sludge, so as to facilitate timely adjustment of the dosage, sludge feed rate and equipment operating parameters of the sludge dewatering device according to the moisture content; 2. Electric heating combined with vacuum drying can quickly determine the moisture content of sludge samples, reducing the long drying time caused by conventional single heating. 3. Saves time and effort by eliminating the need for repeated sampling and drying. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the measuring device; Figure 2 This is a schematic diagram of the sampling plate structure; Figure 3 Side view of the unloading mechanism; Figure 4 Top view of the unloading mechanism; Figure 5 This is a schematic diagram of the locking mechanism.

[0016] The meanings of the main reference numerals in the figure are as follows: 1. Crushing chamber; 2. Slide valve; 3. Crushing mechanism; 4. Crushing motor; 5. Crushing cutter head; 6. Sampling cylinder; 7. Sampling disc; 8. Sampling trough; 9. Gear motor; 11. Guide block; 12. Guide block; 13. Guide hopper; 14. Drying chamber; 15. Weighing sensor; 16. Weighing mechanism; 17. Electric heating wire; 18. Vacuum pump; 19. Weighing plate; 20. Unloading mechanism; 21. Telescopic device; 22. Pusher plate; 23. Collection bin; 24. Lock; 25. Fixed part; 26. Moving part. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] This embodiment provides a sludge moisture content measuring device, see [link / reference] Figure 1-5 As shown, the system includes a crushing chamber 1, with a gate valve 2 installed at the top opening of the crushing chamber 1. A crushing mechanism 3 for dispersing sludge is installed inside the crushing chamber 1. The crushing mechanism 3 includes a support plate horizontally fixed inside the crushing chamber 1 by several support rods (i.e., both ends of the support rods are fixed to the support plate and the inner wall of the crushing chamber 1, respectively). In practical applications, the support plate is located at the center of the crushing chamber 1, and its area does not need to be too large, just large enough to accommodate the motor. A crushing motor 4, with its actuation shaft extending above the support plate, is installed at the bottom of the support plate. A crushing cutter head 5 is installed at the end of the actuation shaft of the crushing motor 4. The dispersed sludge falls through the gaps between the support rods.

[0019] A sampling cylinder 6 is provided below the crushing chamber 1. A sampling disk 7 is rotatably installed inside the sampling cylinder 6. Two sampling slots 8 are symmetrically opened on the sampling disk 7. The diameter of the sampling cylinder 6 is larger than the length and width of the crushing chamber 1. The sampling disk 7 is in close contact with the inner wall of the sampling cylinder 6. A geared motor 9 is installed on the outer wall of one end of the sampling cylinder 6. The actuation shaft of the geared motor 9 is detachably connected to the central shaft fixed inside the sampling disk 7. The geared motor 9 drives the sampling disk 7 to rotate.

[0020] Symmetrically arranged on the inner bottom of the crushing chamber 1 are guide blocks 11 for guiding the crushed sludge into the sampling trough 8. The bottom of the guide blocks 11 forms an arc surface that fits with the sampling plate 7. Symmetrically arranged on the inner top of the drying chamber 14 are guide blocks 12 for restricting the direction of the crushed sludge falling into the sampling plate 7. The top of the guide blocks 12 forms an arc surface that fits with the sampling plate 7. The minimum gap between the guide blocks 11 and the guide blocks 12 corresponds to the opening of the sampling trough 8. A guide hopper 13 is provided at the bottom of the guide blocks 12 for guiding the crushed sludge onto the weighing plate 19 of the weighing mechanism 16.

[0021] A drying chamber 14 is located below the sampling cylinder 6. The bottom plate of the drying chamber 14 is connected to its side wall by multiple connecting rods (i.e., the two ends of the connecting rods are fixed to the bottom plate and the side wall of the drying chamber 14, respectively). In actual application, the bottom plate is located at the center of the bottom of the drying chamber. A weighing sensor 15 is installed on the bottom plate of the drying chamber 14 and connected to a weighing mechanism 16 of the controller. An electric heating wire 17 is arranged around the inside of the drying chamber 14 above the weighing mechanism 16. The drying chamber 14 is connected to a vacuum pump 18 through a pipe, and multiple ventilation holes are opened on the side wall of the drying chamber 14.

[0022] In practical applications, the weighing sensor 15 in the weighing mechanism 16 is preferably a double shear beam (bridge type) weighing sensor 15, and the weighing plate 19 can be directly installed on the top plate of the double shear beam (bridge type) weighing sensor 15.

[0023] See Figure 1 , 3As shown in Figure 4, multiple material discharge channels are formed between the bottom plate of the drying chamber 14 and the side wall of the drying chamber 14 (the two are connected by a connecting rod). A material discharge gap is also formed between the weighing plate 19 fixed on the weighing sensor 15 in the weighing mechanism 16 and the drying chamber 14 (in actual application, the bottom plate of the drying chamber 14 is located directly below the weighing plate 19, and the area of ​​the weighing plate 19 is controlled to be larger than the area of ​​the bottom plate of the drying chamber 14). A material discharge mechanism 20 for pushing the dried sludge into the material discharge gap is provided in the sampling chamber at the bottom of the drying chamber 14 between the heating wire and the weighing mechanism 16. The material discharge mechanism 20 includes a telescopic device 21 installed outside the drying chamber 14. The actuation shaft of the telescopic device 21 is located above the weighing plate 19 of the weighing mechanism 16, and a pusher plate 22 is installed at the end of the actuation shaft. When the telescopic device 21 drives the pusher plate 22 to move laterally, the bottom surface of the pusher plate 22 is in contact with the top surface of the bearing plate.

[0024] A detachable collection bin 23 is installed below the drying bin 14 to collect sludge that falls through the material drop gap and material drop channel. In actual application, the collection bin 23 and the drying bin 14 are connected by multiple latches 24. The fixing part 25 of the latch 24 is installed on the outer wall of the drying bin 14, and the movable part 26 of the latch 24 is correspondingly installed on the outer wall of the collection bin 23.

[0025] In practical applications, the moving equipment (crushing motor 4), electric heating wire 17, and weighing sensor 15 located inside the silo are all connected to the controller in the external central control room via wiring that passes through the corresponding silo body. The data can be controlled or displayed via the control computer in the central control room. The moving equipment located outside the silo (drive motor 9, vacuum pump 18, and telescopic device 21) are also connected to the controller in the external central control room via wiring and can be controlled via the control computer in the central control room.

[0026] In practical applications, the slide gate valve 2 is connected to the sludge discharge pipe of the sludge dewatering machine (installed below the sludge discharge pipe). The slide gate valve 2 can be opened and closed at regular intervals (or manually controlled) so that a small amount of dewatered sludge falls into the crushing chamber 1. The crushing motor 4 drives the crushing blades to rotate and crush and disperse the sludge. The drive motor 9 drives the sampling disk 7 to rotate, causing the sludge to fall into the sampling trough 8. The sampling disk 7 continues to rotate. When the sampling trough 8 containing the sludge rotates to the bottom, the sludge falls through the guide plate onto the weighing plate 19 of the weighing mechanism in the drying chamber 14. The weighing plate 19 is located above the weighing sensor 15. The weighing sensor 15 starts weighing and transmits the initial mass data of the sludge to the controller and displays it on the control computer. Then, the electric heating wire 17 works, and the drying chamber 14 heats up. At the same time, the vacuum pump 18 works, drawing the drying chamber 14 into a vacuum state through the pipeline. Then, the sludge sample is quickly dried to a constant weight (the weight displayed on the control computer by the weighing sensor 15 no longer changes significantly). At this time, the electric heating wire 17 and the vacuum pump 18 are turned off. The weighing sensor 15 transmits the sludge mass data after constant weight to the control computer and calculates the moisture content of the sludge sample based on the initial sludge mass data and the sludge mass data after constant weight. After the measurement is completed, the telescopic device 21 pushes the pusher plate 22 to move back and forth to clean the sludge sample on the weighing plate 19, pushes and sweeps it to the material drop gap and material drop channel and falls into the collection bin 23. The collection bin 23 is detachable and can be disassembled periodically during the inspection process for sludge cleaning.

[0027] Since there is a certain time interval between moisture content measurements, after a measurement is completed, the sludge remaining in the crushing chamber 1 can be returned to the collection chamber 23 by rotating the sampling plate 7 and cooperating with the material return mechanism 20.

[0028] The above description is only a preferred embodiment of this utility model patent. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model patent, and these improvements and modifications should also be considered within the scope of protection of this utility model patent.

Claims

1. A sludge moisture content measuring device, characterized in that, It includes a crushing chamber, with a gate valve installed at the top opening of the crushing chamber, and a crushing mechanism for dispersing sludge installed inside the crushing chamber. A sampling cylinder is installed below the crushing chamber, and a sampling disk is rotatably installed inside the sampling cylinder. Two sampling slots are symmetrically opened on the sampling disk. A drying chamber is set below the sampling cylinder. A weighing sensor is installed on the bottom plate of the drying chamber and a weighing mechanism connected to the controller is installed. An electric heating wire is arranged around the drying chamber located above the weighing mechanism. The drying chamber is connected to a vacuum pump through a pipe and multiple air vents are opened on the side wall of the drying chamber. Multiple material discharge channels are formed between the bottom plate of the drying chamber and the drying chamber. A material discharge gap is also formed between the weighing plate on the weighing sensor in the weighing mechanism and the drying chamber. A material discharge mechanism is set in the sampling chamber at the bottom of the drying chamber, between the heating wire and the weighing mechanism, to push the dried sludge into the material discharge gap. A detachable collection bin is installed below the drying chamber to collect sludge that falls through the material drop gap and material drop channel.

2. The sludge moisture content measuring device according to claim 1, characterized in that, The crushing mechanism includes a bearing plate that is horizontally fixed inside the crushing chamber by several support rods. A crushing motor with an actuation shaft extending above the bearing plate is installed at the bottom of the bearing plate, and a crushing cutter head is installed at the end of the actuation shaft of the crushing motor. The dispersed sludge falls through the gaps between the support rods.

3. The sludge moisture content measuring device according to claim 1, characterized in that, The diameter of the sampling cylinder is larger than the length and width of the crushing chamber, and the sampling disc fits against the inner wall of the sampling cylinder. A geared motor is installed on the outer wall of one end of the sampling cylinder. The actuator of the geared motor is detachably connected to the central shaft fixed inside the sampling disc, and the sampling disc is rotated by the geared motor.

4. The sludge moisture content measuring device according to claim 1, characterized in that, Symmetrical guide blocks are provided on the inner bottom of the crushing chamber to guide the crushed sludge into the sampling tank. The bottom of the guide blocks forms an arc surface that fits the sampling plate.

5. The sludge moisture content measuring device according to claim 1, characterized in that, Symmetrical guide blocks are installed on the inner top of the drying chamber to restrict the direction of sludge falling from the sampling plate after crushing. The top of the guide blocks forms an arc surface that is tangent to the sampling plate.

6. The sludge moisture content measuring device according to claim 1, characterized in that, A guide bucket is provided at the bottom of the guide block to guide the crushed sludge to the weighing mechanism.

7. The sludge moisture content measuring device according to claim 1, characterized in that, The unloading mechanism includes a telescopic device installed outside the drying chamber. The actuating shaft of the telescopic device is located above the weighing plate of the weighing mechanism, and a pusher plate is installed at the end of the actuating shaft. When the telescopic device drives the pusher plate to move laterally, the bottom surface of the pusher plate is in contact with the top surface of the bearing plate.

8. The sludge moisture content measuring device according to claim 1, characterized in that, The bottom plate of the drying chamber is connected to the side wall of the drying chamber by multiple connecting rods.

9. The sludge moisture content measuring device according to claim 1, characterized in that, The collection bin and the drying bin are connected by multiple locking buckles. The fixed part of the buckle is installed on the outer wall of the drying bin, and the movable part of the buckle is installed on the outer wall of the collection bin.

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