Sludge feeding device

Abstract

The utility model discloses a sludge feeding device and relates to the field of sludge treatment equipment. Which comprises a hopper and a conveying assembly, one end of the conveying assembly is communicated with the hopper, the other end of the conveying assembly is communicated with a drying device, and is characterized in that the conveying assembly comprises a feeding part and a crushing part, one end of the feeding part is communicated with the hopper, and the other end of the feeding part is communicated with the crushing part; the feeding part conveys sludge to the crushing part, and the crushing part is communicated with the drying device. The drying device has the advantages that the drying effect can be improved due to the fact that the materials are more uniform after entering the drying device.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment equipment, and in particular to a sludge uniform distribution device. Background Technology

[0002] Sludge treatment primarily targets the lower layer after wastewater sedimentation. Although it is a solid substance, it has a high water content. Therefore, sludge generally needs to be dewatered (pre-dewatered) before treatment, usually by compression to reduce its moisture content. After dewatering, the sludge is generally in cake or block form. Although its moisture content is lower than before treatment, further dewatering is still necessary to further reduce its moisture content. Typically, the sludge is directly transferred to a temporary storage tank with an opening at the bottom, and then conveyed to a drying unit for secondary dewatering. However, this conveying method exacerbates sludge clumping during transport, resulting in uneven distribution of sludge in the drying unit and poor drying efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a sludge uniform distribution device.

[0004] This utility model is achieved using the following technical solution: a sludge feeding device, comprising a hopper and a conveying assembly, one end of the conveying assembly being connected to the hopper and the other end being connected to a drying device, the conveying assembly comprising a feeding section and a crushing section, one end of the feeding section being connected to the hopper and the other end being connected to the crushing section, the feeding section conveying sludge to the crushing section, and the crushing section being connected to the drying device.

[0005] The feeding section includes a screw conveyor and a flow guide. The flow guide is located below the screw conveyor, and the screw conveyor has a liquid outlet on the side facing the flow guide.

[0006] The screw conveyor includes a housing and a filter screen. A feeding screw is provided inside the housing. Filter holes are opened on the housing and face the flow guide. The filter screen is installed in the filter holes. The spacing between adjacent blades of the feeding screw gradually decreases.

[0007] The feeding section includes a conveying pipe and a conveying chain plate. The end of the conveying pipe is connected to the hopper. The conveying chain plate is disposed inside the conveying pipe and moves along the length of the conveying pipe.

[0008] The guide component includes a guide plate, which is fixed on the screw conveyor and is arranged along the length of the screw conveyor.

[0009] The crushing section includes a crushing bucket, and at least one pair of crushing rollers are provided inside the crushing bucket. The crushing rollers are driven to rotate by an electric motor and the rotation directions of the pair of crushing rollers are opposite. The electric motor is fixed to the outer wall of the crushing bucket.

[0010] Compared to existing technologies, this invention first transports the pre-dewatered sludge via a screw conveyor or chain conveyor. The distance between the screw blades of the screw conveyor can be gradually decreasing, meaning the sludge is further compressed during transport, causing water to be released and resulting in better caking. Another embodiment uses a chain conveyor, where water in the sludge can flow directly out through the gaps in the chain plates, allowing for further drying during transport and resulting in a lower moisture content for the sludge entering the drying unit. After being transported to the crushing section, the sludge is broken into small particles, ensuring more uniform particle size before entering the drying unit, thus improving the drying effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the sludge feeding device in this utility model;

[0012] Figure 2 This is a schematic cross-sectional view of the feeding section in the sludge feeding device of this utility model. Figure 1 ;

[0013] Figure 3 This is a schematic cross-sectional view of the feeding section in the sludge feeding device of this utility model. Figure 2 ;

[0014] Figure 4 This is a schematic cross-sectional view of the crushing section in the sludge feeding device of this utility model;

[0015] In the diagram: 1. Hopper; 2. Conveying assembly; 21. Feeding section; 211. Shell; 212. Feeding screw; 213. Filter screen; 214. Filter hole; 215. Conveying pipe; 216. Conveying chain plate; 217. Guide plate; 22. Crushing section; 221. Crushing bucket; 222. Crushing roller. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0017] Reference Figure 1-4A sludge feeding device includes a hopper 1 and a conveying assembly 2. One end of the conveying assembly 2 is connected to the hopper 1, and the other end is connected to a drying device. The conveying assembly 2 includes a feeding section 21 and a crushing section 22. One end of the feeding section 21 is connected to the hopper 1, and the other end is connected to the crushing section 22. The feeding section 21 conveys sludge to the crushing section 22, and the crushing section 22 is connected to the drying device. After being further dewatered by the feeding section 21, the sludge is fed into the crushing section 22 for crushing, so that it can fall more evenly into the drying device for drying, resulting in a better drying effect.

[0018] One embodiment of the feeding section 21 includes a screw conveyor and a guide member. The guide member is located below the screw conveyor, and the screw conveyor has a liquid outlet on the side facing the guide member. The screw conveyor includes a housing 211 and a filter screen 213. A feeding screw 212 is installed inside the housing 211, and filter holes 214 are opened on the housing 211, facing the guide member. The filter screen 213 is installed inside the filter holes 214. The spacing between adjacent blades of the feeding screw 212 gradually decreases. As the feeding screw 212 rotates, the sludge behind will squeeze the sludge in front, so that the sludge is continuously squeezed during the conveying process, which can squeeze out excess water in the sludge, further reducing the moisture content of the sludge. At this time, since the sludge has been squeezed into pieces during the conveying process, it will be crushed after entering the crushing section 22, thus breaking the sludge before entering the drying device, so that it can fall into the drying device more evenly for drying, resulting in a better drying effect. In this embodiment, a guide component needs to be installed below the screw conveyor frame. The guide component can be directly fixed to the casing 211 of the screw conveyor and positioned below the liquid outlet. In actual use, there is often a height difference between the hopper 1 and the feed inlet of the drying device. Excess water will flow downwards within the casing 211 due to gravity and eventually flow out from the liquid outlet, landing on the guide component. The guide component includes a guide plate 217, which is fixed to the screw conveyor and arranged along the length of the screw conveyor. The guide plate 217 is fixed along the length of the casing 211. In actual use, a channel steel can be directly welded to the casing 211 and arranged along the length of the casing 211. Water in the sludge can flow directly out along the guide plate 217 without water accumulation.

[0019] Another embodiment of the feeding unit 21 includes a conveying pipe 215 and a conveying chain plate 216. The end of the conveying pipe 215 is connected to the hopper 1, and the conveying chain plate 216 is disposed inside the conveying pipe 215. The hopper 1 and the crushing unit 22 are connected through the conveying pipe 215, and the conveying chain plate 216 moves along the length of the conveying pipe 215. Using a chain plate conveyor, the moisture in the sludge can flow out directly through the gaps in the chain plate during the conveying process, allowing the sludge to be further dried during transportation, resulting in a lower moisture content for the sludge entering the drying device.

[0020] The crushing section 22 includes a crushing bucket 221, within which at least one pair of crushing rollers 222 are installed. The crushing rollers 222 are driven to rotate by an electric motor, and the pair of crushing rollers 222 rotate in opposite directions. The electric motor is fixed to the outer wall of the crushing bucket 221. The crushing rollers 222 may have sharp protrusions, which, when the pair of crushing rollers 222 rotate, can separate the sludge, preventing it from falling into the drying device in clumps. This results in smaller volumes of sludge entering the drying device, leading to better drying performance.

[0021] Compared to existing technologies, this invention first transports the pre-dewatered sludge via a screw conveyor or chain conveyor. The distance between the screw blades of the screw conveyor can be gradually decreasing, meaning the sludge is further compressed during transport, causing water to be released and resulting in better caking. Another embodiment uses a chain conveyor, where water in the sludge can flow directly out through the gaps in the chain plates, allowing for further drying during transport and resulting in a lower moisture content for the sludge entering the drying unit. After being transported to the crushing section 22, the sludge is crushed into small particles, ensuring more uniform drying upon entering the drying unit, thus improving the drying effect.

[0022] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A sludge feeding device, comprising a hopper and a conveying assembly, one end of the conveying assembly being communicated with the hopper, and the other end of the conveying assembly being communicated with a drying device, characterized in that: The conveying assembly comprises a feeding part and a crushing part, one end of the feeding part is communicated with the hopper, the other end of the feeding part is communicated with the crushing part, the feeding part conveys sludge to the crushing part, the crushing part is communicated with the drying device.

2. The sludge feeding device according to claim 1, characterized in that: The feeding part comprises a screw conveyor and a flow guide, the flow guide is arranged below the screw conveyor, one side of the screw conveyor towards the flow guide is provided with a liquid outlet.

3. The sludge feeding device according to claim 2, characterized in that: The screw conveyor comprises a shell and a filter screen, the shell is provided with a feeding screw, the shell is provided with a filter hole, the filter hole is towards the flow guide, the filter screen is installed in the filter hole, the interval between adjacent blades of the feeding screw is tapered.

4. The sludge feeding device according to claim 1, characterized in that: The feeding part comprises a conveying pipe and a conveying chain plate, the end of the conveying pipe is communicated with the hopper, the conveying chain plate is arranged in the conveying pipe, and the conveying chain plate moves along the length direction of the conveying pipe.

5. The sludge feeding device according to claim 2 or 3, characterized in that: The flow guide comprises a flow guide plate, the flow guide plate is fixed on the screw conveyor, and the flow guide plate is arranged along the length direction of the screw conveyor.

6. The sludge feeding device according to claim 1, characterized in that: The crushing part comprises a crushing hopper, at least one pair of crushing rollers are arranged in the crushing hopper, the crushing rollers are driven to rotate by a motor, and the rotating directions of the pair of crushing rollers are opposite, and the motor is fixed on the outer wall of the crushing hopper.

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