Integrated stirring device
By designing an integrated mixing device, sludge conditioner and sludge are mixed in the inner and outer tanks to form a cell-wall breaking agent, which solves the problems of large footprint and high equipment investment in traditional sludge dewatering systems and achieves efficient sludge dewatering effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGKE HEFEI COAL GASIFICATION TECH CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-08
AI Technical Summary
In traditional sludge dewatering systems, the separate installation of sludge conditioner tanks and sludge tanks results in problems such as large footprint and high equipment investment.
An integrated mixing device was designed, which divides the tank into an inner tank and an outer tank, and connects them through an overflow port on the inner tank. An inlet for fly ash and sludge conditioner is set on the outer tank. The mixing unit uses the mixing shaft to mix the inner and outer tanks to form a cell-wall breaking agent to reduce sludge viscosity and improve fluidity.
It reduces the footprint and equipment investment, improves sludge dewatering efficiency, and lowers equipment costs.
Smart Images
Figure CN224212570U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of stirring devices, and in particular relates to an integrated stirring device. Background Technology
[0002] Wastewater treatment generates a large amount of sludge. As a type of waste, sludge can cause pollution and harm to the environment if it is not treated in a timely manner. Sludge dewatering is a key step in sludge treatment, which can reduce the water content and volume of the sludge, making it easier for subsequent disposal.
[0003] Traditional sludge dewatering systems separate sludge conditioning tanks from sludge tanks, resulting in large floor space requirements and high equipment investment. Utility Model Content
[0004] To address the technical problems of large footprint associated with separately installed sludge conditioner tanks and sludge tanks, this utility model provides an integrated mixing device. This device achieves communication between the inner and outer tanks by incorporating an overflow port on the inner tank, and designs inlets for the water-containing gasified fly ash, sludge conditioner, and sludge, thus creating an integrated mixing device. The technical solution provided by this utility model is as follows.
[0005] This utility model provides an integrated mixing device, comprising: a tank and a mixing unit. The tank includes an outer tank and an inner tank; wherein, the top of the outer tank is provided with a first fly ash inlet for water-containing gasified fly ash and a first regulator inlet for sludge regulator, the side wall is provided with a sludge inlet, and the bottom is provided with a material outlet for discharging the mixture formed by the cell disruptor and sludge; the inner tank is configured to receive water-containing gasified fly ash and sludge regulator and mix them to form a cell disruptor, the top side wall of the inner tank is provided with an overflow port for discharging the cell disruptor, and the inner tank and the outer tank are connected through the overflow port; the mixing unit includes a mixing motor fixed to the top of the outer tank, a mixing shaft controlled by the mixing motor and extending through the inner tank to the bottom of the outer tank, and multiple mixing blades provided on the mixing shaft.
[0006] In some embodiments of the utility model, the top of the inner tank is provided with a second fly ash inlet connected to the first fly ash inlet via a fly ash pipe, and a second regulator inlet connected to the first regulator inlet via a regulator pipe; wherein the fly ash pipe and the regulator pipe are symmetrically arranged.
[0007] In some embodiments of the utility model, at least one stirring blade is provided on the stirring shaft in the inner tank; at least two stirring blades are provided on the stirring shaft in the outer tank, and the spacing between the stirring blades is the same or different; wherein, the stirring blades have a cross-shaped or fan-shaped structure.
[0008] In some embodiments of the utility model, the sludge inlet is located on the side wall of the outer tank below the bottom of the inner tank.
[0009] In some embodiments of the utility model, the diameter of the outer tank is d, and the fly ash pipe and the regulator pipe are located at 1 / 3 to 1 / 6d from the edge of the outer tank.
[0010] In some embodiments of the utility model, the height of the inner tank is h, the overflow port is located at 1 / 9-1 / 15h from the top of the inner tank, and the distance between the overflow port and the inner wall of the outer tank is 1 / 10-1 / 7d.
[0011] In some embodiments of the utility model, the inner tank is fixed to the inner wall of the outer tank by a first bracket, and the bottom of the outer tank is also provided with a plurality of second brackets for supporting the integrated stirring device.
[0012] In some embodiments of the utility model, a plurality of reinforcing devices are provided on the stirring shaft, wherein at least one reinforcing device is located at the torque threshold of the stirring shaft.
[0013] In some embodiments of the utility model, an emergency discharge port is also provided at the bottom of the integrated stirring device.
[0014] In some embodiments of the utility model, the volume ratio of the inner tank to the outer tank is 1:3-1:8.
[0015] Based on the above technical solution, the integrated stirring device provided by this utility model has at least one of the following beneficial effects:
[0016] This invention designs a tank and a mixing unit, dividing the tank into an inner tank and an outer tank. The outer tank has a first fly ash inlet for water-containing gasified fly ash, a first regulator inlet for sludge regulator, and a sludge inlet, allowing the water-containing gasified fly ash and sludge regulator to enter the inner tank, while the sludge enters the outer tank. An overflow port on the side wall of the inner tank connects the inner and outer tanks, creating an integrated mixing device. The mixing shaft in the mixing unit extends through the inner tank to the bottom of the outer tank, enabling simultaneous mixing in different areas within both tanks using the same shaft. The uniformly mixed cell-breaking agent in the inner tank enters the outer tank through the overflow port and mixes with the sludge. The cell-breaking agent converts some of the capillary water and adsorbed water in the sludge into mechanically removable pore water, thereby changing the sludge viscosity, improving its fluidity and solid-liquid separation performance, and achieving sludge dewatering. This integrated mixing device solves the problems of large footprint and high equipment investment in traditional sludge dewatering systems, reducing the footprint and saving on equipment investment. Attached Figure Description
[0017] Figure 1This is a schematic diagram of the integrated stirring device in an embodiment of the present invention.
[0018] [Explanation of Labels in the Attached Image]
[0019] 101-First fly ash inlet, 102-First regulator inlet, 103-Sludge inlet, 104-Inner tank, 105-Outer tank, 106-Agitator motor, 107-Agitator shaft, 108-First agitator blade, 109-Second agitator blade, 110-Third agitator blade, 111-Fourth agitator blade, 112-Reinforcing device, 113-Overflow port, 114-First support, 115-Second support, 116-Material outlet, 117-Emergency discharge port. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.
[0021] To address the issues of large footprint and high equipment investment in traditional sludge dewatering systems, this invention provides an integrated mixing device. By designing the tank and mixing unit, the tank is divided into an inner tank and an outer tank, connected by an overflow port on the inner tank, thus creating an integrated mixing device. Moisture-containing gasified fly ash and sludge conditioner enter the inner tank through the first fly ash inlet and the first conditioner inlet on the outer tank. The mixing unit, extending from the inner tank to the outer tank, thoroughly mixes the moisture-containing gasified fly ash and sludge conditioner, forming a sludge cell-breaking agent. When the level of the cell-breaking agent exceeds the overflow port on the inner tank, it flows into the outer tank and mixes with the sludge inside, thus dewatering the sludge.
[0022] Specifically, this utility model provides an integrated stirring device, including: a tank and a stirring unit.
[0023] Figure 1 This is a schematic diagram of the integrated stirring device in an embodiment of the present invention.
[0024] like Figure 1As shown, the tank includes an outer tank 105 and an inner tank 104. The outer tank 105 has a first fly ash inlet 101 for water-containing gasified fly ash and a first regulator inlet 102 for sludge regulator at the top, a sludge inlet 103 on the side wall, and a material outlet 116 at the bottom for discharging the mixture formed by the cell disruptor and sludge. The inner tank 104 is configured to receive water-containing gasified fly ash and sludge regulator and mix them to form a cell disruptor. The top side wall of the inner tank 104 has an overflow port 113 for discharging the cell disruptor, and the inner tank 104 is connected to the outer tank 105 through the overflow port 113. The stirring unit includes a stirring motor 106 fixed to the top of the outer tank 105, a stirring shaft 107 controlled by the stirring motor 106 and extending through the inner tank 104 to the bottom of the outer tank 105, and multiple stirring blades arranged on the stirring shaft 107.
[0025] In the integrated mixing device of this invention, a first fly ash inlet 101 for water-containing gasified fly ash and a first regulator inlet 102 for sludge regulator are provided on the outer tank 105. The inner tank 104 is located inside the outer tank 105, allowing all water-containing gasified fly ash and sludge regulator to be introduced into the inner tank 104. An overflow port 113 is provided on the top side wall of the inner tank 104, serving as a channel connecting the inner tank 104 and the outer tank 105. The mixing unit is fixed on the outer tank 105. The mixing shaft 107 in the mixing unit is controlled by the mixing motor 106 and extends through the inner tank 104 to the bottom of the outer tank 105. The mixing blades on the mixing shaft 107 can be used to mix the water-containing gasified fly ash and sludge regulator in the inner tank 104 to obtain a cell-wall breaking agent. When the liquid level of the cell-wall disruptor is higher than the overflow port 113, it overflows and enters the outer tank 105, where it mixes with the sludge. The porous particles in the water-containing gasified fly ash of the cell-wall disruptor can adsorb moisture and organic matter in the sludge, disrupting the colloidal structure. At the same time, it converts some of the capillary water and adsorbed water in the sludge into mechanically removable pore water, thereby changing the sludge viscosity and improving sludge flowability and solid-liquid separation performance. After the cell-wall disruptor and sludge are evenly mixed in the outer tank 105, they can be discharged from the mixing outlet 116 at the bottom of the outer tank 105 and enter the downstream filter press or filtration device for dewatering treatment.
[0026] In some embodiments of the utility model, the water-containing gasification fly ash can be from fly ash in an entrained fluidized bed or a circulating fluidized bed; the sludge conditioner can be any one of polyferric sulfate, polyaluminum chloride, or lime, and the sludge conditioner can be an acidic or alkaline polymer with corrosive properties; and the small particle size of the water-containing gasification fly ash will cause wear to the inner tank 104, outer tank 105, and pipelines, and the high ash content and acidic / alkaline substances in the sludge will also cause wear and corrosion to the inner tank 104, outer tank 105, and pipelines. Therefore, in the integrated mixing device of this utility model, the materials of both the inner tank 104 and the outer tank 105 are stainless steel.
[0027] In embodiments of this invention, when the moisture content of the water-containing gasified fly ash is ≥50%, the sludge conditioner can be solid (such as solid polyferric sulfate). The solid sludge conditioner (such as solid polyferric sulfate) is directly fed into the first conditioner inlet 102, thereby entering the inner tank 104. The water contained in the water-containing gasified fly ash dissolves the solid sludge conditioner, effectively utilizing the moisture in the high-moisture-content gasified fly ash while reducing additional water consumption. When the moisture content of the water-containing gasified fly ash is <50%, a liquid sludge conditioner can be used. A flow meter and a delivery pump are installed between the sludge conditioner storage tank and the first conditioner inlet 102 to pump the liquid sludge conditioner into the first conditioner inlet 102.
[0028] Continue as Figure 1As shown, in the integrated mixing device of this utility model: the top of the inner tank 104 is provided with a second fly ash inlet connected to the first fly ash inlet 101 via a fly ash pipe, and a second regulator inlet connected to the first regulator inlet 102 via a regulator pipe. The height of the inner tank 104 is h, and both the fly ash pipe and the regulator pipe are located at 1 / 4h to 1 / 2h below the overflow port 113; the overflow port 113 is located at 1 / 9 to 1 / 15h from the top of the inner tank 104, for example, it can be 1 / 9h, 1 / 10h, 1 / 12h, 1 / 14h, or 1 / 15h, and the distance between it and the inner wall of the outer tank 105 is 1 / 10 to 1 / 7d, for example, it can be 1 / 10d, 1 / 9d, 1 / 8d, or 1 / 7d; there is one, two, or more overflow ports, and multiple overflow ports 113 are arranged circumferentially around the inner tank 104. To ensure uniform mixing of the cell-wall disruptor and sludge in the inner tank 104, an overflow port 113 is provided on the upper side wall of the inner tank 104 as a channel connecting the inner tank 104 and the outer tank 105. When the level of the cell-wall disruptor exceeds the overflow port 113, the disruptor flows into the outer tank 105, where it contacts, mixes, and agitates the sludge. To ensure thorough mixing of the water-containing gasified fly ash and sludge conditioner in the inner tank 104, the overflow port 113 is positioned at a distance of 1 / 9 to 1 / 15h from the top of the inner tank 104. If the overflow port 113 is positioned lower, the capacity of the inner tank 104 will be smaller, which is not conducive to uniform mixing and results in lower mixing efficiency. The distance between the overflow port 113 and the inner wall of the outer tank 105 is 1 / 10-1 / 7d. If the distance is smaller, it may hinder the wall-breaking agent from entering the outer tank 105 smoothly. At the same time, the wall-breaking agent will also wash the inner wall of the outer tank 105. If the distance is larger, it will reduce the capacity of the inner tank 104 and cannot guarantee the mixing efficiency of the integrated stirring device.
[0029] Furthermore, the outer tank 105 has a diameter of d, and the fly ash pipe and regulator pipe are located at 1 / 3 to 1 / 6d from the edge of the outer tank 105. This ensures that the fly ash pipe and regulator pipe are located inside the inner tank 104, thereby ensuring that both the water-containing gasified fly ash and the sludge regulator enter the inner tank 104. The fly ash pipe and regulator pipe are located at, for example, 1 / 3, 1 / 4, 1 / 5, or 1 / 6 of the distance from the edge of the outer tank 105. Even further, the fly ash pipe and regulator pipe are symmetrically arranged. The diameter of the fly ash pipe and regulator pipe is d1, and the lateral distance from the overflow port 113 to the inlet of the fly ash pipe and regulator pipe is d1-3d1.
[0030] Continue as Figure 1As shown, in the inner tank 104, at least one stirring blade, such as the first stirring blade 108, is provided on the stirring shaft 107; in the outer tank 105, at least two stirring blades, such as the second stirring blade 109, the third stirring blade 110, and the fourth stirring blade 111, are provided on the stirring shaft 107. The spacing between the stirring blades may be the same or different; wherein, the stirring blades have a cross-shaped or fan-shaped structure. For example, the first stirring blade 108, the second stirring blade 109, and the third stirring blade 110 have a cross-shaped structure, and the fourth stirring blade 111 has a fan-shaped structure.
[0031] In this embodiment of the invention, to achieve integrated stirring, facilitate control, save electricity, and reduce the space occupied by the inner tank 104 and the outer tank 105, only one stirring shaft 107 is provided. The stirring speed of the stirring shaft 107 can be controlled between 15-50 r / min to achieve uniform stirring of the water-containing gasified fly ash and sludge conditioner, and the cell-wall breaking agent and sludge. The stirring speed of the stirring shaft 107 can be 15 r / min, 25 r / min, 35 r / min, 45 r / min, or 50 r / min. Since the inner tank 104 is used to mix the water-containing gasified fly ash and sludge conditioner, the mixture has a small mass and is easily dispersed, so only one stirring blade is required. However, the outer tank 105 is used to mix the cell-wall breaking agent and sludge, and the mixture has a larger volume, mass, and stirring resistance, so at least two stirring blades are required to ensure thorough and uniform stirring. The spacing between the stirring blades in the inner tank 104 and the outer tank 105 can be the same or different, depending on the actual stirring conditions. Setting the mixing blades to a cross-shaped or fan-shaped structure can meet the requirements for shear force or high-flow mixing, making the cell wall disruptor and sludge mix more evenly.
[0032] Continue as Figure 1 As shown, the sludge inlet 103 is located on the side wall of the outer tank 105, below the bottom of the inner tank 104. The height H of the outer tank 105 is greater than the height h of the inner tank 104. The height of the outer tank is H, and the distance between the sludge inlet 103 and the bottom of the outer tank is 1 / 2-1 / 3H. Positioning the sludge inlet 103 on the side wall of the outer tank 105, below the bottom of the inner tank 104, serves two purposes: firstly, to prevent sludge from entering the inner tank 104 during mixing and to avoid affecting the outer wall of the inner tank 104; secondly, to ensure the volume of sludge within the outer tank 105, thus guaranteeing the working efficiency of the integrated mixing device.
[0033] Continue as Figure 1As shown, the inner tank 104 is fixed to the inner wall of the outer tank 105 by the first bracket 114, ensuring that the inner tank 104 is stably fixed in the outer tank 105. The bottom of the outer tank 105 is also provided with multiple second brackets 115 for supporting the integrated stirring device. The multiple second brackets 115 can be arranged in a triangular shape or form a base to support the integrated stirring device to ensure stability.
[0034] In this embodiment of the invention, because the outer tank 105 is quite deep, the torque during stirring is large, which can easily damage the stirring shaft 107. Therefore, continuing as follows... Figure 1 As shown, a plurality of reinforcing devices 112 are provided on the stirring shaft 107, wherein at least one reinforcing device 112 is provided at the torque threshold (such as the maximum torque) to effectively prevent damage to the stirring shaft 107.
[0035] Continue as Figure 1 As shown, the bottom of the integrated mixing device is also equipped with an emergency discharge port 117 to ensure that when the mixture in the outer tank 105 reaches the threshold or exceeds the maximum capacity (more than 90% of the volume of the outer tank 105), the material can be discharged by opening the emergency discharge port 117, thus ensuring the safety and normal use of the integrated mixing device. Furthermore, the volume ratio of the inner tank 104 to the outer tank 105 is 1:3 to 1:8, for example, it can be 1:3, 1:4, 1:5, 1:6, 1:7, or 1:8.
[0036] The volume ratio of the inner tank 104 and the outer tank 105 is adapted to the volume ratio of the cell disruptor and the sludge to ensure that the calorific value provided by the water-containing gasification fly ash is sufficient for sludge combustion, so as to fully combust the sludge using the carbon in the water-containing gasification fly ash in downstream applications. Furthermore, the air-dry basis mass ratio of water-containing gasification fly ash to sludge can be controlled within the integrated mixing device at 1:5 to 2:1, for example, 1:5, 1:3, 1:1, 1.5:1, 1.7:1, or 2:1. The air-dry basis calorific value of the water-containing gasification fly ash needs to be ≥3500 kcal / kg, for example, 3500, 3700, 4000, 4200, or 4500 kcal / kg, and the air-dry basis calorific value of the sludge needs to be ≥1600 kcal / kg, for example, 1600, 2000, 2300, 2500, or 2600 kcal / kg.
[0037] In summary, this utility model provides an integrated mixing device. By designing the tank and mixing unit, the tank is divided into an inner tank 104 and an outer tank 105, connected by an overflow port 113 on the side wall of the inner tank 104, thus constructing an integrated mixing device. Moisture-containing gasified fly ash enters the inner tank 104 through the first fly ash inlet 101 on the outer tank 105, and sludge conditioner enters through the first conditioner inlet 102 on the outer tank 105. The mixing is achieved by the stirring blades in the inner tank 104, ensuring thorough and uniform mixing of the moisture-containing gasified fly ash and sludge conditioner, forming a sludge cell-breaking agent. When the level of the cell-wall disruptor exceeds the overflow port 113 on the inner tank 104, it flows into the outer tank 105. A stirring unit extending from the inner tank 104 to the outer tank 105 is used to stir the mixture, ensuring thorough and uniform mixing of the cell-wall disruptor with the sludge in the outer tank 105. This process converts some of the capillary water and adsorbed water in the sludge into mechanically removable pore water, altering the sludge viscosity and improving its fluidity and solid-liquid separation performance. The integrated stirring device design of this invention cleverly places the inner tank 104 inside the outer tank 105, solving the problems of large footprint and high equipment investment in traditional sludge dewatering systems, thus reducing the footprint and saving on equipment investment.
[0038] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.
Claims
1. An integrated stirring device, characterized in that, include: The tank body includes an outer tank body and an inner tank body; The outer tank has a first fly ash inlet at the top for water-containing gasified fly ash and a first regulator inlet at the bottom for sludge regulator; a sludge inlet on the side wall; and a material outlet at the bottom for discharging the mixture formed by the cell wall breaking agent and sludge. The inner tank is configured to receive the water-containing gasified fly ash and the sludge conditioner and mix them to form the cell-breaking agent. The top side wall of the inner tank is provided with an overflow port for discharging the cell-breaking agent, and the inner tank is connected to the outer tank through the overflow port. The stirring unit includes a stirring motor fixed to the top of the outer tank, a stirring shaft controlled by the stirring motor and extending through the inner tank to the bottom of the outer tank, and a plurality of stirring blades disposed on the stirring shaft.
2. The integrated stirring device according to claim 1, characterized in that, The top of the inner tank is provided with a second fly ash inlet connected to the first fly ash inlet via a fly ash pipe, and a second regulator inlet connected to the first regulator inlet via a regulator pipe; The fly ash pipe and the regulator pipe are arranged symmetrically.
3. The integrated stirring device according to claim 1, characterized in that, Inside the inner tank, at least one stirring blade is provided on the stirring shaft; Inside the outer tank, at least two stirring blades are provided on the stirring shaft, and the spacing between the stirring blades may be the same or different. The stirring blades have a cross-shaped or fan-shaped structure.
4. The integrated stirring device according to claim 3, characterized in that, The sludge inlet is located on the side wall of the outer tank below the bottom of the inner tank.
5. The integrated stirring device according to claim 2, characterized in that, The outer tank has a diameter of d, and the fly ash pipe and the regulator pipe are located at a distance of 1 / 3 to 1 / 6d from the edge of the outer tank.
6. The integrated stirring device according to claim 5, characterized in that, The height of the inner tank is h, and the overflow port is located at 1 / 9 to 1 / 15h from the top of the inner tank, and the distance between the overflow port and the inner wall of the outer tank is 1 / 10 to 1 / 7d.
7. The integrated stirring device according to claim 1, characterized in that, The inner tank is fixed to the inner wall of the outer tank by a first bracket, and the bottom of the outer tank is also provided with multiple second brackets to support the integrated stirring device.
8. The integrated stirring device according to claim 1, characterized in that, The stirring shaft is equipped with multiple reinforcing devices, at least one of which is located at the torque threshold of the stirring shaft.
9. The integrated stirring device according to claim 1, characterized in that, The bottom of the integrated mixing device is also equipped with an emergency discharge port.
10. The integrated stirring device according to claim 1, characterized in that, The volume ratio of the inner tank to the outer tank is 1:3 to 1:8.