Normal-temperature homogenization modification device for undisturbed phosphogypsum

Abstract

The utility model discloses a normal-temperature homogenization modification device for undisturbed phosphogypsum. The normal-temperature homogenization modification device comprises a crushing device, the dynamic weighing and conveying device is used for receiving the phosphogypsum treated by the crushing device and conveying and dynamically weighing the phosphogypsum; the water content monitoring device is used for monitoring the water content of the phosphogypsum treated by the crushing device in real time; the modifier distributing device is used for adding a modifier to the phosphogypsum on the dynamic weighing and conveying device; the control device is electrically connected to the dynamic weighing and conveying device or the weighing part of the dynamic weighing and conveying device, the moisture content monitoring device and the modifier distributing device respectively; and the control device is used for calculating the dosage of the modifier needing to be added in real time according to the ardealite mass data obtained from the dynamic weighing and conveying device and the ardealite water content data obtained from the water content monitoring device, and controlling the modifier distributing device to distribute materials according to a calculation result. The feeding device has the advantages of being high in speed, real-time and uniform in feeding.

Description

Technical Field

[0001] This utility model relates to the technical field of phosphogypsum pretreatment equipment, and in particular to a room temperature homogenization and modification device for undisturbed phosphogypsum. Background Technology

[0002] To achieve large-scale, harmless, and resource-based utilization of phosphogypsum, pretreatment and modification are typically required. Common treatment methods include crushing the undisturbed phosphogypsum to reduce particle size, facilitating subsequent processing and application. The crushed undisturbed phosphogypsum must then undergo modification treatment. The main purpose of this modification is to neutralize its acidity by adding alkaline modifiers (such as lime, quicklime, hydrated lime, fly ash, or industrial waste containing active calcium oxide / magnesium oxide), and to convert impurities such as eutectic phosphorus and fluoride ions into insoluble or stable forms, thereby reducing their migration and harmfulness.

[0003] In existing technologies, when modifying crushed undisturbed phosphogypsum, the addition of modifiers is usually carried out in a mixing tank. Examples include patent CN2023230038549, a device for rapid cooling and homogenization modification of powder; patent CN202110159187, a novel homogenization modification device; and CN202120350466, a novel homogenization tank. However, this conventional approach has significant drawbacks: first, the processing speed is slow, making continuous modification difficult; second, it is difficult to achieve real-time and uniform distribution of the modifier in the phosphogypsum stream.

[0004] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a room temperature homogenization and modification device for raw phosphogypsum that can deliver materials quickly, in real time, and uniformly.

[0006] This utility model is achieved through the following technical solution:

[0007] To solve the above-mentioned technical problems, this utility model provides a room-temperature homogenization and modification device for undisturbed phosphogypsum, comprising:

[0008] a) A crushing device for receiving raw phosphogypsum and crushing it;

[0009] b) A dynamic weighing and conveying device for receiving the phosphogypsum processed by the crushing device and for conveying and dynamically weighing it;

[0010] c) A moisture content monitoring device for real-time monitoring of the moisture content of phosphogypsum after processing by the crushing device;

[0011] d) A modifier cloth applicator for adding modifier to the phosphogypsum on the dynamic weighing and conveying device; and

[0012] e) A control device, wherein the control device is electrically connected to the dynamic weighing and conveying device or its weighing part, the moisture content monitoring device and the modifier fabrication device respectively;

[0013] The control device calculates the amount of modifier to be added in real time based on the phosphogypsum quality data obtained from the dynamic weighing and conveying device and the phosphogypsum moisture content data obtained from the moisture content monitoring device, and controls the modifier spreading device to spread the material according to the calculation results.

[0014] To further address the technical problems addressed by this invention, this invention provides a room-temperature homogenization and modification device for undisturbed phosphogypsum. The modifier distribution device includes a storage silo for storing the modifier, a feeding mechanism located below the storage silo, and a distribution head for distributing and spreading the modifier. The feeding mechanism includes one or more valves for controlling the flow rate of the modifier. The distribution head is a screw-type pushing device, including a housing, a pushing screw located within the housing, and a drive motor for rotating the pushing screw. The drive motor is connected to and controlled by the control device.

[0015] To further address the technical problems to be solved by this utility model, this utility model provides a room temperature homogenization and modification device for raw phosphogypsum, wherein the feeding mechanism is connected to the feed port of the screw-type pushing device through a hose or pipe.

[0016] To further address the technical problems to be solved by this utility model, this utility model provides a room temperature homogenization and modification device for undisturbed phosphogypsum. The discharge end of the screw-type pusher is provided with a long strip-shaped discharge port that is basically the same width as the conveyor belt. The discharge port is provided with a material adjustment mechanism for controlling its opening and closing degree. The material adjustment mechanism is connected to and controlled by the control device.

[0017] To further address the technical problems to be solved by this utility model, this utility model provides a room temperature homogenization and modification device for raw phosphogypsum, wherein the storage silo is equipped with a bag-breaking mechanism for processing bagged modifiers.

[0018] To further address the technical problems to be solved by this utility model, the present utility model provides a room temperature homogenization and modification device for undisturbed phosphogypsum, wherein the dynamic weighing and conveying device is a belt scale, including a conveyor belt and a dynamic weighing unit located below the feeding point of the crushing device and used to monitor the quality of phosphogypsum on the conveyor belt in real time.

[0019] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a room temperature homogenization and modification device for undisturbed phosphogypsum, wherein the crushing device is a hammer crusher or an impact crusher.

[0020] To further address the technical problems to be solved by this utility model, the present utility model provides a room temperature homogenization and modification device for undisturbed phosphogypsum, wherein the moisture content monitoring device is an infrared moisture content monitor or a microwave moisture content monitor.

[0021] To further address the technical problems to be solved by this utility model, in the ambient temperature homogenization and modification device for undisturbed phosphogypsum provided by this utility model, the control device also controls the feeding speed or processing capacity of the crushing device based on the phosphogypsum mass flow rate data obtained from the dynamic weighing and conveying device, so as to achieve constant flow rate feeding of phosphogypsum.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] This invention provides a room-temperature homogenization modification device for undisturbed phosphogypsum, overcoming the key problems of slow, uneven, and unreal-time addition of phosphogypsum modifiers in existing technologies. By integrating a real-time dynamic weighing and conveying device (precisely acquiring the phosphogypsum mass flow rate) and a real-time moisture content monitoring device (acquiring moisture content data), and with the control device performing precise calculations based on this real-time data, and then linking and controlling the screw-type precision distribution mechanism (especially employing a design with a long strip-shaped discharge port and a distribution adjustment mechanism), this device can ensure that the required modifier is rapidly, in real-time, in sufficient quantity, and with high uniformity distributed across the entire width of the moving phosphogypsum flow. This technological combination achieves a high initial dispersion uniformity between the modifier and phosphogypsum particles before entering subsequent processing steps, thereby significantly improving the modification efficiency and the uniformity and stability of the modification effect of phosphogypsum. Attached Figure Description

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the modifier fabrication device. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please see Figure 1 and Figure 2 , Figure 1 This diagram illustrates a system schematic of a room-temperature homogenization and modification device for undisturbed phosphogypsum according to an embodiment of the present invention. Figure 2 A schematic diagram of the modifier application device is shown. This device is mainly used for homogenization and modification of pre-crushed undisturbed phosphogypsum at room temperature, with the core function being to achieve real-time and uniform application of the modifier.

[0029] According to one embodiment of the present invention, the room temperature homogenization and modification feeding device for undisturbed phosphogypsum mainly includes the following key components:

[0030] Crushing device 1: Used to receive the raw phosphogypsum material from upstream and further crush it to make its particle size suitable for subsequent conveying and modification processing. In a more specific embodiment, the crushing device 1 can be a conventional crushing equipment such as a hammer crusher or an impact crusher, which can effectively crush large pieces of phosphogypsum into smaller and more uniform particles.

[0031] Dynamic weighing and conveying device 2: Located below the crushing device 1, it receives the crushed phosphogypsum and conveys it downstream. Crucially, this device integrates dynamic weighing functionality, enabling real-time and continuous measurement of the mass or mass flow rate of the phosphogypsum on the conveyor belt. In a preferred embodiment, the dynamic weighing and conveying device 2 can employ a reliable belt scale, comprising a continuously operating conveyor belt and a dynamic weighing unit positioned below the conveyor belt for real-time monitoring of the instantaneous weight or flow rate of the material on the belt. By analyzing the belt speed and the monitored weight, the mass of phosphogypsum passing through per unit time, i.e., the mass flow rate, can be accurately calculated.

[0032] Moisture content monitoring device 3: Located above or to the side of the dynamic weighing and conveying device 2, it is used to monitor the moisture content of the phosphogypsum being conveyed in real time. The moisture content of phosphogypsum affects its apparent quality and the actual amount of modifier required (usually, the modifier is added according to the weight ratio of dry or oven-dry phosphogypsum). By monitoring the moisture content in real time, more accurate calculation of the modifier dosage can be achieved. The moisture content monitoring device 3 can be a non-contact monitoring device, such as an infrared moisture content monitor or a microwave moisture content monitor. These devices can quickly and accurately measure the moisture content of moving materials without affecting the material flow.

[0033] Modifier distribution device 4: This is a key component for achieving precise and uniform distribution of the modifier. It is located above the dynamic weighing and conveying device 2 and is used to add the required inorganic modifier (such as lime, quicklime powder, etc.) to the phosphogypsum material flow on the conveyor belt.

[0034] In detail, the modifier fabrication device 4 includes a storage bin 41 for storing block or powdered modifiers. Considering that modifiers may be supplied in bagged form in actual production, in a further embodiment, the storage bin 41 may be equipped with a bag-breaking mechanism 411 to facilitate the direct input of bagged modifiers into the storage bin and automatic bag breaking.

[0035] The lower part of the storage silo 41 is equipped with a feeding mechanism for controlling the speed or flow rate of the modifier discharged from the storage silo. The feeding mechanism includes one or more valves 42 for initially controlling the amount of modifier discharged.

[0036] The modifier discharged from the feeding mechanism is delivered to the core fabric distribution unit—the screw-type pusher 43—through a hose 44 or pipe. This connection method has a certain degree of flexibility, making it convenient for installation and maintenance.

[0037] The screw-type pushing device 43 is the core component for achieving uniform distribution of the modifier. It includes a housing 431, inside which a pushing screw 432 is installed. The pushing screw 432 is driven to rotate by an external drive motor 433. By controlling the rotational speed of the drive motor 433, the speed and flow rate of the modifier pushed forward by the pushing screw 432 can be precisely controlled.

[0038] The screw-type pusher 43 has an elongated discharge port 45 at its discharge end. The length of this discharge port 45 is roughly the same as the width of the conveyor belt below, which allows the modifier to be evenly distributed across the width of the entire phosphogypsum material flow, overcoming the problem of uneven distribution caused by traditional point or line-type material distribution.

[0039] To further fine-tune the uniformity and flow rate of the fabric, a fabric adjustment mechanism 46 is also provided at the elongated outlet 45. This mechanism can control the opening and closing degree of the outlet 45 or adjust the discharge gap, thereby affecting the spreading density of the modifier in the width direction or the total amount of material discharged.

[0040] Here are some specific examples of fabric adjustment mechanisms 46:

[0041] 1) Controlled slide gate valve:

[0042] The controlled slide gate valve is a rotatable valve plate that can automatically control the opening and closing degree of the valve plate, so as to achieve the uniform distribution of the homogenizing modifier on the phosphogypsum surface on the conveyor belt according to the predetermined ratio.

[0043] 2) Sliding gate type adjusting mechanism:

[0044] Structure: One or more gates that can slide horizontally or tilted are installed below or on the side of the elongated discharge port 45. These gates are driven by a small motor or cylinder (actuator), which is connected to the control device 5.

[0045] Operating principle: By controlling the sliding position of the gate, the discharge port 45 can be partially blocked or fully opened. When the gate slides into the discharge port area, the discharge area decreases, and the amount of modifier fed and the spreading width (effective spreading range) are limited; when the gate slides out, the discharge port is fully opened, achieving the maximum spreading effect.

[0046] Applications: It can control the overall fabric flow rate (in coordination with screw speed) or roughly adjust the effective width of the spread.

[0047] 3) Segmented adjustment mechanism:

[0048] Structure: The elongated discharge port 45 is divided into several independent zones (e.g., 5, 10, or even more small zones) along its length (i.e., roughly parallel to the width of the conveyor belt). Each small zone has an independent fine-tuning mechanism, such as an independent sliding gate, rotating baffle, or elastic adjusting plate. Each fine-tuning mechanism is controlled by an independent actuator, all of which are connected to the control device 5.

[0049] Operating mode: Control device 5 not only calculates the total modifier requirement, but can also individually control the opening and closing degree of each small area as needed (e.g., if some areas of the phosphogypsum flow on the conveyor belt are found to be thicker or have slightly different moisture content). For example, if a large amount of phosphogypsum is found in the middle part of the conveyor belt, the opening degree of the discharge port in the middle area can be increased; if a small amount of phosphogypsum is found in the edge part, the opening degree of the edge area can be decreased.

[0050] Advantages: It can achieve fine adjustment and "shaping" of the modifier distribution, compensate for the impact of uneven screw pushing or phosphogypsum material flow itself, and thus achieve more perfect uniform distribution of modifier across the entire conveyor belt width. This is a very effective way to achieve the goal of "homogenization modification".

[0051] Application: Primarily used to ensure the uniform distribution of modifiers throughout the width of the phosphogypsum layer, it is one of the key means to achieve high uniformity.

[0052] 4) Adjustable angle or gap baffle / scraper mechanism:

[0053] Structure: Rotatable or height-adjustable baffles or scrapers are installed at the edges (usually the lower edge or both sides) of the elongated discharge port 45. These baffles or scrapers are driven by actuators and connected to the control device 5.

[0054] Working principle: By changing the angle or position of the baffle, the parabolic trajectory of the modifier falling from the outlet can be altered, or its flow speed and uniformity can be controlled. For example, adjusting the angle of an inclined baffle can affect the diffusion range and force of the modifier as it falls. Adjusting the gap between the upper and lower edges of the outlet can directly control the amount of material passing through.

[0055] Advantages: It can affect the dynamic characteristics of material falling, and sometimes helps prevent blockages or improve the "spreading" effect of the spread.

[0056] Applications: It can be used to fine-tune the fabric flow rate and the spreading pattern.

[0057] 5) Flexible or adaptable export adjustment:

[0058] Structure: Part or all of the edges of the discharge port 45 are made of elastic or flexible material, and its shape can be adjusted by external mechanisms (such as clamps, airbags or levers).

[0059] Working method: By controlling the external mechanism to squeeze or stretch the flexible edge, the actual shape and area of ​​the discharge port are changed.

[0060] Advantages: The structure may be relatively compact, and it has a certain adaptability to materials of different particle sizes.

[0061] Applications: Controlling flow rate and spread shape.

[0062] Control device 5: This is an automated control unit, the brain of the entire device. The control device 5 is connected via cables or communication lines to the weighing part of the dynamic weighing and conveying device 2 (to acquire phosphogypsum mass or flow data), the moisture content monitoring device 3 (to acquire phosphogypsum moisture content data), and the key actuators of the modifier spreading device 4 (such as drive motor 433 and spreading adjustment mechanism 46).

[0063] The working principle and specific control logic of this utility model are as follows:

[0064] The crushed undisturbed phosphogypsum is conveyed by a dynamic weighing and conveying device 2. During the conveying process, the dynamic weighing and conveying device 2 measures the mass flow rate of the phosphogypsum in real time and sends this data to the control device 5. At the same time, the moisture content monitoring device 3 monitors the moisture content of the phosphogypsum on the conveyor belt in real time and also sends the data to the control device 5.

[0065] After receiving the mass flow rate and moisture content data of phosphogypsum, control device 5 calculates the precise amount of modifier to be added to the phosphogypsum flow rate at the current moment or per unit time based on the preset ratio of modifier to phosphogypsum. This ratio is usually determined based on the composition analysis and modification target of the phosphogypsum, and may need to consider the dry basis weight. The calculation formula can take into account factors such as the wet weight of phosphogypsum, moisture content, and the desired dry weight ratio of modifier, thereby obtaining the wet weight or volumetric flow rate of modifier to be added.

[0066] For example, if the modifier is required to be added at X% of the dry weight of phosphogypsum, the control device 5 will receive the wet mass flow rate M of the phosphogypsum. w And the moisture content W%. Then the dry basis phosphogypsum mass flow rate M. d =M w 1-W%. Required mass flow rate M of the modifier. 改 =M d *X%. The control device 5 then converts the required mass flow rate of the modifier into the appropriate rotational speed of the drive motor 433 of the screw-type pusher 43 based on the bulk density of the modifier or the calibration curve of the current discharge mechanism 4, and sends a control signal to the drive motor 433. At the same time, the control device 5 may also adjust the opening and closing degree of the fabric adjustment mechanism 46 as needed to optimize the spreading effect of the modifier or further refine the flow rate control.

[0067] Through this closed-loop control based on real-time weighing and moisture content data, the control device 5 can accurately control the feeding speed and spreading method of the modifier distribution device 4, ensuring that the modifier can be added to the moving phosphogypsum material flow in real time, in sufficient quantity and uniformly, thereby greatly improving the utilization efficiency of the modifier and the uniformity and stability of the modification effect.

[0068] In a more preferred embodiment, the control device 5 can also use the phosphogypsum mass flow rate data obtained from the dynamic weighing and conveying device 2 to issue control commands to the upstream crushing device 1, such as adjusting the feeding speed or processing capacity of the crushing device 1. The purpose of this is to stabilize the flow rate of phosphogypsum entering the dynamic weighing and conveying device 2 as much as possible, so as to achieve a constant flow rate of phosphogypsum feeding, which helps to further improve the stability of the entire system and the accuracy of modifier dosing.

[0069] In summary, this invention combines dynamic weighing, moisture content monitoring, and precise control with a screw-type feeder, and uses an intelligent control system for real-time adjustment. This successfully overcomes the shortcomings of existing technologies, such as slow, uneven, and unreal-time application of phosphogypsum modifiers. It achieves efficient, rapid, and uniform homogenization modification of undisturbed phosphogypsum at room temperature, providing a stable and reliable raw material for the subsequent resource utilization of phosphogypsum.

[0070] Those skilled in the art will understand that various changes and modifications can be made to the above embodiments without departing from the principles and spirit of this utility model, and these changes and modifications also fall within the protection scope of this utility model. For example, the structure of the specific modifier spreading device, the type of moisture content monitoring device, and the algorithm details of the control device can all be adjusted according to actual needs, but its core technical features, such as real-time weighing, moisture content monitoring, precise spreading control based on data calculation, and the use of a spreading head that can achieve uniform spreading, should be included within the protection scope of this utility model.

Claims

1. A device for room temperature homogenization and modification of undisturbed phosphogypsum, characterized in that, include: a) A crushing device (1) for receiving raw phosphogypsum and crushing it; b) A dynamic weighing and conveying device (2) for receiving the phosphogypsum processed by the crushing device (1) and conveying and dynamically weighing it; c) Moisture content monitoring device (3) for real-time monitoring of the moisture content of phosphogypsum after processing by the crushing device (1); d) A modifier cloth device (4) for adding modifier to the phosphogypsum on the dynamic weighing and conveying device (2); and e) A control device (5), which is electrically connected to the dynamic weighing and conveying device (2) or its weighing part, the moisture content monitoring device (3) and the modifier fabrication device (4). The control device (5) calculates the amount of modifier to be added in real time based on the phosphogypsum quality data obtained from the dynamic weighing and conveying device (2) and the phosphogypsum moisture content data obtained from the moisture content monitoring device (3), and controls the modifier spreading device (4) to spread the material according to the calculation results. The modifier spreading device (4) includes a storage bin (41) for storing the modifier, a feeding mechanism located at the bottom of the storage bin (41), and a spreading head for dispensing and spreading the modifier; the feeding mechanism includes one or more valves (42) for controlling the flow rate of the modifier; the spreading head is a screw-type pushing device (43), including a housing (431), a pushing screw (432) located in the housing (431), and a drive motor (433) for driving the pushing screw (432) to rotate; the drive motor (433) is connected to and controlled by the control device (5).

2. The apparatus for room temperature homogenization and modification of undisturbed phosphogypsum according to claim 1, characterized in that: The feeding mechanism is connected to the feed port of the screw-type pusher (43) via a hose (44) or pipe.

3. The apparatus for room temperature homogenization and modification of undisturbed phosphogypsum according to claim 1, characterized in that: The dynamic weighing and conveying device (2) is a belt scale, including a conveyor belt and a dynamic weighing unit located below the feeding point of the crushing device (1) and used to monitor the quality of phosphogypsum on the conveyor belt in real time.

4. The apparatus for room temperature homogenization and modification of undisturbed phosphogypsum according to claim 3, characterized in that: The screw-type pusher (43) has a long strip-shaped discharge port (45) that is basically the same width as the conveyor belt at its discharge end. The discharge port (45) is provided with a fabric adjustment mechanism (46) for controlling its opening and closing degree. The fabric adjustment mechanism (46) is connected to and controlled by the control device (5).

5. The apparatus for room temperature homogenization and modification of undisturbed phosphogypsum according to claim 1, characterized in that: The storage bin (41) is equipped with a bag-breaking mechanism (411) for processing bagged modifiers.

6. The apparatus for room temperature homogenization and modification of undisturbed phosphogypsum according to claim 1, characterized in that: The crushing device (1) is a hammer crusher or an impact crusher.

7. The apparatus for room temperature homogenization and modification of undisturbed phosphogypsum according to claim 1, characterized in that: The moisture content monitoring device (3) is an infrared moisture content monitor or a microwave moisture content monitor.

8. The apparatus for room temperature homogenization and modification of undisturbed phosphogypsum according to claim 1, characterized in that: The control device (5) also controls the feeding speed or processing capacity of the crushing device (1) based on the phosphogypsum mass flow rate data obtained from the dynamic weighing and conveying device (2) to achieve constant flow rate feeding of phosphogypsum.

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