Treatment device for dewatered sludge

Abstract

The invention belongs to the technical field of sludge treatment, and particularly relates to a dewatered sludge treatment device which comprises a material box, a feeding hole is formed in the upper end of the material box, and a screw pump is arranged at the bottom of the material box; the interior of the treatment chamber is divided into an outer chamber and an inner chamber, and an ultrasonic vibration rod is arranged in the inner chamber; the motor group consists of a plurality of motors; a blade is arranged at the head end of each motor and located in the inner chamber, and the motors are located in the outer chamber. Sludge is fed into the inner chamber by the screw pump; the drying unit comprises a loading chamber and a drying chamber; a plurality of layers of tray structures are arranged in the loading chamber from top to bottom; a heating pipe is correspondingly arranged in the drying chamber; a plurality of drying chamber inlets are correspondingly formed in the left side wall connected with the loading chamber; after being filled with sludge, the tray on the uppermost layer in the loading chamber enters the upper part of the heating pipe on the corresponding layer in the drying chamber through the corresponding inlet of the drying chamber to be dried, and then materials are discharged from the outlet of the drying chamber respectively.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a dewatered sludge treatment device. Background Art

[0002] Sludge is a product of sewage treatment plants. The harmlessness, stabilization and reduction of sludge treatment are important issues in sludge treatment. Sludge drying is a commonly used sludge reduction technology. By drying the sludge, the volume of the sludge can be greatly reduced, thereby greatly reducing the difficulty of treatment and transportation costs.

[0003] Before the sludge is dried, pretreatment can reduce the difficulty of drying. Currently, there are pretreatment methods such as mechanical crushing, ultrasonic, microwave, and hydrothermal. Among these methods, the purpose of mechanical crushing and ultrasonic pretreatment is to break up sludge aggregates and cell walls to release the water and intracellular substances contained in the sludge cells, thereby reducing the time required for sludge drying.

[0004] However, most of the existing processing methods are single, and it is difficult to break all cells with the two pretreatments of mechanical disruption and ultrasonic wave, resulting in low processing efficiency and poor quality. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a dewatered sludge treatment device to solve the current lack of mechanical crushing combined with ultrasonic sludge treatment method and device, and realizes efficient treatment of sludge, including:

[0006] A material box, with a feed port at the top and a screw pump at the bottom;

[0007] The treatment chamber is divided into an outer chamber and an inner chamber, wherein the inner chamber is provided with an ultrasonic vibrator; and further comprises a plurality of motor groups composed of a plurality of motors along the length direction of the inner chamber; a blade is provided at the head end of each motor, wherein the blade is located in the inner chamber and the motor is located in the outer chamber; and a screw pump delivers the sludge into the inner chamber;

[0008] The drying unit comprises a loading chamber and a drying chamber; a multi-layer tray structure is arranged from top to bottom in the loading chamber; a multi-layer heating tube is arranged correspondingly in the drying chamber; a plurality of drying chamber entrances are arranged correspondingly on the left wall connected to the loading chamber; after the uppermost tray in the loading chamber is filled with sludge, it enters the corresponding drying chamber entrance to the top of the heating tube of the corresponding layer in the drying chamber for drying, and then the material is discharged from the drying chamber outlet respectively.

[0009] Furthermore, the processing chamber has a certain inclination angle.

[0010] Furthermore, a plurality of coaxial blades are arranged at the head end of each motor.

[0011] Furthermore, the width of the drying chamber entrance matches the width of the tray, and the height of the entrance is the thickness of the sludge.

[0012] Furthermore, slideways are provided in the boxes on both sides of the loading chamber and the drying chamber to cooperate with the conveying and traction device to move the tray.

[0013] Furthermore, a heat-insulating layer is provided on the outer periphery of the drying chamber.

[0014] Compared with the prior art, the beneficial effects of the present invention are embodied in the following points:

[0015] First, the blades are evenly distributed in the inner chamber of the treatment chamber, so that the sludge can fully contact the blades. At the same time, when the blades cut the sludge, part of the sludge will be thrown out and contact the ultrasonic vibrator in the inner chamber of the treatment chamber for ultrasonic treatment, and the two cooperate with each other.

[0016] Second, after the sludge to be treated is transported to the inner chamber of the treatment chamber by a screw pump, the flocs in the sludge are broken up by a high-speed rotating blade, while the structure of the microorganisms therein is destroyed, the moisture therein is released, and the viscosity of the sludge is reduced. The ultrasonic vibrator therein is used to ultrasonically break up the sludge aggregates and the remaining cell walls.

[0017] Third, the treatment chamber will rotate along the central axis so that all the sludge can be fully and evenly subjected to mechanical crushing and ultrasonic treatment. The blades can be installed to adjust their opening and closing angles and directions according to the properties of the sludge. The sludge can be transported to the outlet while being mechanically crushed. At the same time, the treatment chamber is tilted at a certain angle so that the sludge can spontaneously move toward the outlet of the treatment chamber during the treatment process.

[0018] Fourth, when a certain amount of sludge that has been mechanically crushed and ultrasonically treated is loaded into the chamber, the top tray will move to the drying chamber. At the same time, the size and shape of the entrance to the drying chamber will limit the accumulation of sludge, and the sludge will be spread into a layer of uniform thickness for subsequent drying. The excess sludge will enter the next tray and mix with the subsequent sludge entering the loading chamber and continue the previous steps. The sludge can be spread into a layer of uniform thickness.

[0019] Fifth, the drying chamber and the loading chamber are equipped with slides to facilitate the movement of the tray. An insulation layer is provided around the drying chamber to reduce heat loss. The heat emitted by the heating tube can simultaneously bake the upper layer of the sludge and the bottom layer of the tray to accelerate its drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the blade;

[0022] Figure 3 Schematic diagram of blade angle change;

[0023] Figure 4 is a schematic diagram of the position of the roller;

[0024] Among them: 1. Material box; 2. Material box feed port; 3. Screw pump; 4. Screw pump feed port; 5. Screw pump motor; 6. Rotary joint; 7. Processing chamber; 8. Outer chamber of processing chamber; 9. Inner chamber of processing chamber; 10. Blade; 11. Ultrasonic vibrator; 12. Motor; 13. Loading chamber; 14. Loading chamber entrance; 15. Tray; 16. Drying chamber; 17. Insulation layer; 18. Drying chamber entrance; 19. Heating tube; 20. Roller. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] refer to Figure 1 , the present invention provides a dewatered sludge drying device, including a material box 1, a screw pump 4, a processing chamber 7, a loading chamber 13 and a drying chamber 16;

[0027] The material box 1 is provided with a feed port 2, and the sludge to be treated is put into the material box 1 from the feed port 2 to wait for treatment. The feed port 4 of the screw pump 3 is placed at the bottom of the material box 1, and the motor 5 of the screw pump is installed below the material box 1 and on the left side of the screw pump 3. The end of the screw pump 3 is connected to the treatment chamber 7 through a rotary joint 6. The screw pump 3 will transport the sludge in the material box 1 into the inner chamber 9 of the treatment chamber 7. The treatment chamber 7 is placed in the middle of the entire device, and the treatment chamber 7 is divided into an inner chamber 9 and an outer chamber 8. Reference Figure 2 The inner chamber 9 of the treatment chamber 7 contains several knife shafts with blades 10 installed, and each knife shaft is installed with several blades 10. The knife shafts are connected to several motors 12 in the outer chamber 8 of the treatment chamber. Each motor 12 is connected to a group of knife shafts, and multiple motors form a motor group. After the sludge to be treated is transported to the inner chamber 9 of the treatment chamber through the screw pump 3, the blades 10 are driven by the motor group to cut and perform mechanical crushing treatment.

[0028] At the same time, an ultrasonic vibrator 11 is installed in the center of the inner chamber 9 of the treatment chamber to perform ultrasonic crushing on the dehydrated sludge. The inner chamber 9 and the outer chamber 8 of the treatment chamber 7 will rotate synchronously along the axis so that the sludge can fully contact the blade 10 and the ultrasonic vibrator 11 at the same time. The blade 10 can adjust its opening and closing angle and direction according to the nature of the sludge. Figure 3, while mechanically crushing the sludge, the sludge can be transported to the outlet. At the same time, the treatment chamber 7 has a certain inclination angle, which can also make the sludge move to the outlet of the treatment chamber 7 under the action of gravity. The outlet of the treatment chamber 7 is connected to the loading chamber entrance 14. The loading chamber entrance 14 is located on the upper right side of the loading chamber 13. The loading chamber 13 is located below the treatment chamber 7. There are several trays 15 in the loading chamber 13, which are arranged in multiple layers in the upper and lower parts. When a certain amount of sludge is loaded, the top tray 15 will enter the drying chamber 16 along the slide through the conveying and traction structure. The drying chamber 16 is located on the right side of the loading chamber 13. The boxes on both sides of the loading chamber 13 and the drying chamber 16 are provided with slides for the trays 15 to move therein. After the sludge is loaded, the trays 15 move to the drying chamber 16 for drying.

[0029] As an improvement to the solution, the conveying and traction structure may be provided with pull wires on both sides of the pallet.

[0030] As an improvement of the scheme, a roller is set at the connection between the loading chamber 13 and the drying chamber 16, and a roller is set at the junction of each layer of the loading chamber 13 and the drying chamber 16. The right side of the tray is placed on the roller, and a motor is set on each layer to drive the rotation of the roller as a transmission traction structure, which cooperates with the slides on both sides to move the tray from the loading chamber 13 to the drying chamber 16. The surface of the roller and the back of the tray are both designed to be rough surfaces.

[0031] As an improvement to the solution, refer to Figure 4 In this article, a roller 20 can be placed at the beginning of the slideways on both sides of the drying chamber. The rollers of each layer are controlled to rotate by a motor as a transmission traction structure, and the right side of the tray is placed on the roller to achieve movement. The roller surface is designed to be rough. When the tray of the first layer is completely entered into the drying chamber by the motor, the motor of the second layer starts to rotate to move the tray of the second layer. The operation of the corresponding motor can be controlled by a displacement sensor in conjunction with a controller.

[0032] At the same time, the size and shape of the drying chamber entrance 18 will spread the sludge into a layer of uniform thickness for subsequent drying. The excess sludge will enter the right side of the next tray 15 and mix with the sludge that subsequently enters the loading chamber 13. Repeat the previous steps on the remaining trays 15 to make each tray 15 evenly spread with a layer of sludge of the same thickness.

[0033] The drying chamber is surrounded by a layer of insulation material 17, and a heating pipe 19 is arranged inside. After the sludge enters the drying chamber with the tray 15, the heating pipe 19 starts to heat up, and the sludge is heated and dried at the same time above and below the tray 15. When the drying is completed, the dried sludge can be taken out through the right side of the drying chamber 16, and then the tray 15 can return to the loading chamber 13 to wait for the loading of sludge.

[0034] An experiment was conducted using a method of mechanical crushing combined with ultrasonic treatment to dehydrate sludge. The sludge after the combined treatment of the two methods was dried, and the drying rate was compared with that of untreated sludge and sludge treated by the two methods alone. It was found that compared with the sludge treated with the two methods, the untreated sludge took about 10% longer to dry, while the sludge treated with mechanical crushing and the sludge treated with ultrasonic treatment took about 4% and 4.5% longer to dry, respectively.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dewatered sludge treatment device, characterized in that: include, A material box, with a feed port at the top and a screw pump at the bottom; The treatment chamber is divided into an outer chamber and an inner chamber, wherein the inner chamber is provided with an ultrasonic vibrator; and further comprises a motor group consisting of a plurality of motors; a blade is provided at the head end of each motor, wherein the blade is located in the inner chamber and the motor is located in the outer chamber; and a screw pump delivers the sludge into the inner chamber; A drying unit, comprising a loading chamber and a drying chamber; A multi-layer tray structure is arranged from top to bottom in the loading chamber; a multi-layer heating tube is arranged correspondingly in the drying chamber; a plurality of drying chamber entrances are arranged correspondingly on the left wall connected to the loading chamber; after the uppermost tray in the loading chamber is filled with sludge, it enters the corresponding drying chamber entrance to the top of the heating tube of the corresponding layer in the drying chamber for drying, and then is discharged from the drying chamber outlets respectively.

2. A dewatered sludge treatment device as claimed in claim 1, characterized in that: The processing chamber has a certain inclination angle.

3. A dewatered sludge treatment device according to claim 1, characterized in that: A plurality of coaxial blades are arranged at the head end of each motor.

4. A dewatered sludge treatment device as claimed in claim 1, characterized in that: The width of the drying chamber entrance matches the width of the tray, and the height of the entrance is the thickness of the sludge.

5. The dewatered sludge treatment device according to claim 1, characterized in that: The boxes on both sides of the loading chamber and the drying chamber are provided with slideways to cooperate with the conveying and traction device to move the tray.

6. A dewatered sludge treatment device as claimed in claim 1, characterized in that: A heat-insulating layer is arranged on the periphery of the drying chamber.

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