Slurry feeding system of spray tower for drying kaolin

Abstract

The utility model discloses a slurry feeding system of a spray tower for drying kaolin. The device is characterized in that a slurry storage cylinder and a spray tower are connected through two slurry supply pipelines, and each slurry supply pipeline comprises a pre-pumping electric control valve, a filter, a plunger pump, a post-pumping electric control valve, a slurry supply pipe flow sensor, a surge tank, a slurry supply pipe pressure sensor and a spray gun which are sequentially connected, a pre-pumping electric switching valve is arranged between the plunger pump and the filter, a post-pumping electric switching valve is arranged between the plunger pump and the post-pumping electric switching valve, the spray gun is connected with a slurry supply pipe pressure sensor through an annular pipe, and a spray gun flow sensor is arranged on the spray gun; and the controller is respectively connected with the slurry supply pipe flow sensor, the slurry supply pipe pressure sensor, the spray gun flow sensor, the electric control valve in front of the pump, the electric switching valve in front of the pump, the frequency converter of the plunger pump, the electric switching valve behind the pump and the electric control valve behind the pump. The slurry feeding device can stably control the slurry feeding flow and pressure, and is high in automation degree.

Description

Technical Field

[0001] This utility model relates to the field of kaolin processing technology, specifically to a spray tower slurry feeding system for drying kaolin. Background Technology

[0002] In the kaolin processing industry, spray towers are a commonly used drying equipment, widely applied in the drying process of kaolin. Spray towers achieve efficient and rapid drying by dispersing kaolin slurry into fine droplets, allowing for thorough heat exchange with hot air.

[0003] However, existing spray towers still have some problems in terms of slurry infeed stability. Unstable slurry infeed can lead to wall sticking, material collapse, uneven particle size, excessive moisture, large pressure fluctuations, and low automation, resulting in unstable product quality, low productivity, and high operating and maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a spray tower slurry feeding system for drying kaolin, which can stably control the slurry flow rate and pressure, and has a high degree of automation, thereby improving production efficiency and product quality, and reducing operation and maintenance costs.

[0005] To achieve the above objectives, the present invention proposes the following technical solution:

[0006] A spray tower slurry feeding system for drying kaolin includes a slurry storage tank, a spray tower, and a controller. The slurry storage tank and the spray tower are connected by two slurry supply pipelines, one of which is in use and the other is in reserve. The system can be maintained without interrupting equipment maintenance, ensuring the continuity and stability of slurry feeding.

[0007] Each grout supply line includes, in sequence, an inlet electric control valve, a filter, a plunger pump, a outlet electric control valve, a grout supply line flow sensor, a pressure stabilizing tank, a grout supply line pressure sensor, and a spray gun. An inlet electric switching valve is located between the plunger pump and the filter to switch between the two grout supply lines. An outlet electric switching valve is also located between the plunger pump and the outlet electric control valve to switch between the two grout supply lines. The spray gun includes an annular tube and a spray gun flow sensor. The spray gun is connected to the grout supply line pressure sensor via the annular tube. The spray gun flow sensor is mounted on the spray gun to monitor the flow rate in real time. The plunger pump is equipped with a frequency converter to regulate the plunger pump speed and thus adjust the grout flow rate.

[0008] The input terminals of the controller are connected to the grout supply pipe flow sensor, the grout supply pipe pressure sensor, and the spray gun flow sensor, respectively. The output terminals of the controller are connected to the pre-pump electric control valve, the pre-pump electric switching valve, the frequency converter of the plunger pump, the post-pump electric switching valve, and the post-pump electric control valve, respectively.

[0009] The slurry supply pipe flow sensor monitors the flow rate in the slurry supply pipe in real time and sends a flow signal to the controller. The slurry supply pipe pressure sensor monitors the pressure in the slurry supply pipe in real time and sends a pressure signal to the controller. The spray gun flow sensor monitors the flow rate in the spray gun in real time and sends the spray gun flow rate to the controller. Based on the feedback signals from the slurry supply pipe flow sensor, slurry supply pipe pressure sensor, and spray gun flow sensor, the controller dynamically adjusts the speed of the plunger pump and the opening of the electric control valves before and after the pump to achieve precise regulation of slurry flow and pressure. The controller can also automatically adjust the slurry flow and pressure according to actual production needs to ensure a stable supply of slurry in the spray tower. The controller switches the electric switching valves before and after the pump according to production needs or maintenance tasks to switch between the two slurry supply pipes to ensure the continuity and stability of slurry supply.

[0010] Preferably, the system also includes a spray gun inlet valve, which is located between the slurry supply pipe pressure sensor and the annular pipe. The spray gun inlet valve is connected to the output end of the controller. The spray gun flow sensor monitors the flow in the spray gun in real time and sends the spray gun flow information to the controller. When the spray gun is blocked and the flow reaches the fault value, the controller sends a cut-off signal to the spray gun inlet valve to prevent unatomized slurry from entering the spray tower and affecting product quality.

[0011] Preferably, the controller is a PLC controller.

[0012] Preferably, the system also includes an alarm, which is connected to the output of the controller via a relay. When a system malfunctions or parameters are abnormal, the controller sends an alarm command to the alarm, which then issues an alarm signal to remind the operator to take timely action.

[0013] Preferably, each slurry supply pipeline is equipped with two filters, one for use and one as a backup, which are cleaned regularly to prevent clogging of the pipeline and spray gun.

[0014] Preferably, the pressure stabilizing tank is a vertical pressure vessel with a compressed air interface at the top and a conical flow guide structure at the bottom, with an inclination angle of 45°~60°. The inner wall is lined with a wear-resistant ceramic lining, which can keep the compressed air pressure constant within a certain range, maintain the stability of the system pressure, effectively reduce slurry deposition, and ensure that the slurry can stably enter the spray tower.

[0015] Preferably, the filter is a dual-bag filter with a filtration accuracy of 80-100 mesh.

[0016] Preferably, the annular tube of the spray gun is provided with 6-8 atomizing nozzles arranged radially, with a nozzle orifice diameter of 1.2~1.5mm. The radial nozzle layout can reduce the standard deviation of the atomized particle size from ±15μm to ±5μm, thereby improving the drying efficiency.

[0017] Specifically, the slurry enters the spray tower via a storage tank, filter, plunger pump, pressure stabilizing tank, and spray gun. A slurry supply pipe flow sensor monitors the flow rate in the supply pipe in real time and sends a flow signal to the controller. A slurry supply pipe pressure sensor monitors the pressure in the supply pipe in real time and sends a pressure signal to the controller. A spray gun flow sensor monitors the flow in the spray gun in real time and sends the spray gun flow status to the controller. Based on the feedback signals from the slurry supply pipe flow sensor, slurry supply pipe pressure sensor, and spray gun flow sensor, the controller dynamically adjusts the plunger pump speed and the opening of the pre-pump and post-pump electric control valves to achieve precise regulation of the slurry flow and pressure. The controller can also automatically adjust the slurry flow and pressure according to actual production needs to ensure a stable slurry supply in the spray tower. The controller switches the pre-pump and post-pump electric switching valves according to production needs or maintenance tasks to switch between the two slurry supply pipes, ensuring the continuity and stability of the slurry supply.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention provides two slurry supply pipelines between the slurry storage tank and the spray tower. The two pipelines are used interchangeably, with one as a backup and the other as a backup for the other. This ensures continuous and stable slurry supply without interrupting equipment maintenance.

[0020] This invention monitors the flow and pressure of the slurry supply pipeline and the spray gun by setting up a slurry supply pipe flow sensor, a pressure sensor, and a spray gun flow sensor, and feeds the data back to the controller. Based on the feedback signals, the controller dynamically adjusts the speed of the plunger pump and the opening of the electric control valves before and after the pump, thereby achieving automated, stable, and precise regulation of the slurry flow and pressure. This ensures that the slurry enters the spray tower stably and continuously, and is uniformly atomized and dried within the tower. It also ensures a stable supply of slurry within the spray tower, improving drying efficiency and product quality, thereby guaranteeing stable system operation and reducing operating and maintenance costs.

[0021] By adopting the above solution, this utility model can stably control the slurry flow rate and pressure, and has a high degree of automation, thereby improving production efficiency and product quality, while reducing operation and maintenance costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the first embodiment.

[0024] Figure 2 This is a schematic diagram of the structure of the second embodiment.

[0025] In the diagram, 1-slurry storage tank, 2-electric control valve before pump, 3-filter, 4-electric switching valve before pump, 5-plunger pump, 6-electric switching valve after pump, 7-electric control valve after pump, 8-slurry supply pipe flow sensor, 9-pressure stabilizing tank, 10-slurry supply pipe pressure sensor, 11-first annular pipe, 12-first spray gun flow sensor, 13-first spray gun, 14-spray tower, 15-second spray gun flow sensor, 16-second spray gun, 17-second annular pipe, 18-controller, 19-slurry inlet valve of first spray gun, 20-slurry inlet valve of second spray gun, 21-alarm. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 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 this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] First embodiment:

[0031] like Figure 1 As shown, a spray tower slurry feeding system for drying kaolin includes a slurry storage tank 1, a spray tower 14, and a controller 18. The slurry storage tank 1 and the spray tower 14 are connected by two slurry supply pipelines, one of which is in use and the other is in reserve. The equipment can be maintained without stopping the machine during maintenance, ensuring the continuity and stability of slurry feeding.

[0032] Each grout supply pipeline includes, in sequence, an inlet electric control valve 2, a filter 3, a plunger pump 5, an outlet electric control valve 4, a grout supply pipeline flow sensor 8, a pressure stabilizing tank 9, a grout supply pipeline pressure sensor 10, and a spray gun. An inlet electric switching valve 4 is provided between the plunger pump 5 and the filter 3 to switch between the two grout supply pipelines. An outlet electric switching valve 6 is provided between the plunger pump 5 and the outlet electric control valve 7 to switch between the two grout supply pipelines. The spray gun includes an annular tube and a spray gun flow sensor. The spray gun is connected to the grout supply pipeline pressure sensor 10 through the annular tube. The spray gun flow sensor is located on the spray gun and is used to monitor the flow of the spray gun in real time. The plunger pump 5 is equipped with a frequency converter to regulate the speed of the plunger pump 5 and thus adjust the grout flow rate and pressure.

[0033] The grout supply pipeline is divided into a first grout supply pipeline and a second grout supply pipeline. The spray gun is divided into a first spray gun 13 and a second spray gun 16. The first spray gun 13 is placed on the first grout supply pipeline, and the second spray gun 16 is placed on the second grout supply pipeline. The first spray gun 13 includes a first annular pipe 11 and a first spray gun flow sensor 12. The first spray gun flow sensor 12 monitors the flow of the first spray gun 13 in real time. The second spray gun 16 includes a second annular pipe 17 and a second spray gun flow sensor 15. The second spray gun flow sensor 15 monitors the flow of the second spray gun 16 in real time. The first spray gun flow sensor 12 and the second spray gun flow sensor 15 are connected to the input terminal of the controller 18.

[0034] The input terminals of the controller 18 are respectively connected to the grout supply pipe flow sensor 8, the grout supply pipe pressure sensor 10, the first spray gun flow sensor 12, and the second spray gun flow sensor 15. The output terminals of the controller 18 are respectively connected to the in-pump electric control valve 2, the in-pump electric switching valve 4, the frequency converter of the plunger pump 5, the in-pump electric switching valve 6, and the in-pump electric control valve 7.

[0035] The grout supply pipe flow sensor 8 monitors the flow rate in the grout supply pipe in real time and sends a flow rate signal to the controller 18. The grout supply pipe pressure sensor 10 monitors the pressure in the grout supply pipe in real time and sends a pressure signal to the controller 18. The first spray gun flow sensor 12 monitors the flow of the first spray gun 13 in real time and sends the flow rate information of the first spray gun 13 to the controller 18. The second spray gun flow sensor 15 monitors the flow of the second spray gun 16 in real time and sends the flow rate information of the second spray gun 16 to the controller 18. The controller 18 is based on the grout supply pipe flow sensor 8 and the grout supply pipe pressure sensor 10. The feedback signals from the first spray gun flow sensor 12 and the second spray gun flow sensor 15 dynamically adjust the speed of the plunger pump 5 and the opening of the electric control valve 2 before the pump and the electric control valve 7 after the pump, thereby achieving precise regulation of the slurry flow and pressure. The controller 18 can also automatically adjust the slurry flow and pressure according to actual production needs to ensure that the slurry in the spray tower 14 is always supplied stably. The controller 18 switches the electric switching valve 4 before the pump and the electric switching valve 6 after the pump according to production needs or maintenance tasks to achieve switching between the two slurry supply pipelines, so as to ensure the continuity and stability of the slurry supply.

[0036] Second embodiment:

[0037] like Figure 2 As shown, a spray tower slurry feeding system for drying kaolin includes a slurry storage tank 1, a spray tower 14, and a controller 18. The slurry storage tank 1 and the spray tower 14 are connected by two slurry supply pipelines, one of which is in use and the other is in reserve. The equipment can be maintained without stopping the machine during maintenance, ensuring the continuity and stability of slurry feeding.

[0038] Each grout supply pipeline includes, in sequence, an inlet electric control valve 2, a filter 3, a plunger pump 5, an outlet electric control valve 4, a grout supply pipeline flow sensor 8, a pressure stabilizing tank 9, a grout supply pipeline pressure sensor 10, and a spray gun. An inlet electric switching valve 4 is provided between the plunger pump 5 and the filter 3 to switch between the two grout supply pipelines. An outlet electric switching valve 6 is provided between the plunger pump 5 and the outlet electric control valve 7 to switch between the two grout supply pipelines. The spray gun includes an annular tube and a spray gun flow sensor. The spray gun is connected to the grout supply pipeline pressure sensor 10 through the annular tube. The spray gun flow sensor is located on the spray gun and is used to monitor the flow of the spray gun in real time. The plunger pump 5 is equipped with a frequency converter to regulate the speed of the plunger pump 5 and thus adjust the grout flow rate and pressure.

[0039] The grout supply pipeline is divided into a first grout supply pipeline and a second grout supply pipeline. The spray gun is divided into a first spray gun 13 and a second spray gun 16. The first spray gun 13 is placed on the first grout supply pipeline, and the second spray gun 16 is placed on the second grout supply pipeline. The first spray gun 13 includes a first annular pipe 11 and a first spray gun flow sensor 12. The first spray gun flow sensor 12 monitors the flow of the first spray gun 13 in real time. The second spray gun 16 includes a second annular pipe 17 and a second spray gun flow sensor 15. The second spray gun flow sensor 15 monitors the flow of the second spray gun 16 in real time. The first spray gun flow sensor 12 and the second spray gun flow sensor 15 are connected to the input terminal of the controller 18.

[0040] The input terminals of the controller 18 are respectively connected to the grout supply pipe flow sensor 8, the grout supply pipe pressure sensor 10, the first spray gun flow sensor 12, and the second spray gun flow sensor 15. The output terminals of the controller 18 are respectively connected to the in-pump electric control valve 2, the in-pump electric switching valve 4, the frequency converter of the plunger pump 5, the in-pump electric switching valve 6, and the in-pump electric control valve 7.

[0041] It also includes two spray gun slurry inlet valves, namely a first spray gun slurry inlet valve 19 and a second spray gun slurry inlet valve 20. The first spray gun slurry inlet valve 19 is located between the slurry supply pipe pressure sensor 10 and the first annular pipe 11, and the second spray gun slurry inlet valve 20 is located between the slurry supply pipe pressure sensor 10 and the second annular pipe 17. The first spray gun slurry inlet valve 19 and the second spray gun slurry inlet valve 20 are connected to the output terminal of the controller 18.

[0042] The first spray gun flow sensor 12 monitors the flow in the first spray gun 13 in real time and sends the flow status of the first spray gun 13 to the controller 18. When the first spray gun 13 is blocked, the flow reaches the fault value, and the controller 18 sends a cut-off signal to the first spray gun inlet valve 19 to prevent unatomized mud from entering the spray tower 14 and affecting product quality.

[0043] The second spray gun flow sensor 15 monitors the flow in the second spray gun 16 in real time and sends the flow status of the second spray gun 16 to the controller 18. When the second spray gun 16 is blocked, the flow reaches the fault value, and the controller 18 sends a cut-off signal to the second spray gun inlet valve 20 to prevent unatomized mud from entering the spray tower 14 and affecting product quality.

[0044] It also includes an alarm 21, which is connected to the output terminal of the controller 18 via a relay. When the system malfunctions or the parameters are abnormal, the controller 18 sends an alarm command to the alarm 21, and the alarm 21 sends an alarm signal to remind the operator to handle the situation in a timely manner.

[0045] The grout supply pipe flow sensor 8 monitors the flow rate in the grout supply pipe in real time and sends a flow rate signal to the controller 18. The grout supply pipe pressure sensor 10 monitors the pressure in the grout supply pipe in real time and sends a pressure signal to the controller 18. The first spray gun flow sensor 12 monitors the flow of the first spray gun 13 in real time and sends the flow rate information of the first spray gun 13 to the controller 18. The second spray gun flow sensor 15 monitors the flow of the second spray gun 16 in real time and sends the flow rate information of the second spray gun 16 to the controller 18. The controller 18 is based on the grout supply pipe flow sensor 8 and the grout supply pipe pressure sensor 10. The feedback signals from the first spray gun flow sensor 12 and the second spray gun flow sensor 15 dynamically adjust the speed of the plunger pump 5 and the opening of the electric control valve 2 before the pump and the electric control valve 7 after the pump, thereby achieving precise regulation of the slurry flow and pressure. The controller 18 can also automatically adjust the slurry flow and pressure according to actual production needs to ensure that the slurry in the spray tower 14 is always supplied stably. The controller 18 switches the electric switching valve 4 before the pump and the electric switching valve 6 after the pump according to production needs or maintenance tasks to achieve switching between the two slurry supply pipelines, so as to ensure the continuity and stability of the slurry supply.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spray tower slurry feeding system for drying kaolin, comprising a slurry storage tank and a spray tower, characterized in that: The system also includes a controller. The slurry storage tank and the spray tower are connected by two slurry supply pipelines. Each slurry supply pipeline includes, in sequence, a pre-pump electric control valve, a filter, a plunger pump, a post-pump electric control valve, a slurry supply pipeline flow sensor, a pressure stabilizing tank, a slurry supply pipeline pressure sensor, and a spray gun. A pre-pump electric switching valve is provided between the plunger pump and the filter to switch between the two slurry supply pipelines. A post-pump electric switching valve is provided between the plunger pump and the post-pump electric control valve to switch between the two slurry supply pipelines. The spray gun includes an annular tube and a spray gun flow sensor. The spray gun is connected to the slurry supply pipeline pressure sensor through the annular tube, and the spray gun flow sensor is located on the spray gun. The plunger pump is equipped with a frequency converter. The input terminals of the controller are connected to the slurry supply pipeline flow sensor, the slurry supply pipeline pressure sensor, and the spray gun flow sensor, respectively. The output terminals of the controller are connected to the pre-pump electric control valve, the pre-pump electric switching valve, the plunger pump frequency converter, the post-pump electric switching valve, and the post-pump electric control valve, respectively.

2. The spray tower slurry feeding system for drying kaolin according to claim 1, characterized in that: It also includes a slurry inlet valve for the spray gun, which is located between the slurry supply pipe pressure sensor and the annular pipe, and is connected to the output terminal of the controller.

3. The spray tower slurry feeding system for drying kaolin according to claim 1, characterized in that: It also includes an alarm, which is connected to the output of the controller via a relay.

4. The spray tower slurry feeding system for drying kaolin according to claim 1, characterized in that: The controller is a PLC controller.

5. The spray tower slurry feeding system for drying kaolin according to claim 1, characterized in that: It also includes an alarm, which is connected to the output of the controller via a relay.

6. The spray tower slurry feeding system for drying kaolin according to claim 1, characterized in that: The pressure stabilizing tank is a vertical pressure vessel with a compressed air interface at the top and a conical flow guide structure at the bottom, with an inclination angle of 45°~60°, and a ceramic lining on the inner wall.

7. The spray tower slurry feeding system for drying kaolin according to claim 1, characterized in that: The filter is a dual-bag filter with a filtration accuracy of 80-100 mesh.

8. The spray tower slurry feeding system for drying kaolin according to claim 1, characterized in that: The spray gun has 6-8 radially distributed atomizing nozzles in its annular tube, with a nozzle orifice diameter of 1.2-1.5 mm.

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