Powdery raw material feeding system and method

Abstract

The invention relates to the technical field of solid materials, in particular to a powdery raw material feeding system and method. The powdery raw material feeding system comprises a hopper, a supporting frame, a feeding device, a weighing sensor, a screw feeder and a controller. The support frame is used for providing installation or support for at least other components of the powdery raw material feeding system, the hopper support is arranged in the support frame, and the screw feeder is connected with an outlet of the hopper. The feeding device is used for conveying powdery raw materials into the hopper. The weighing sensor is used for detecting the weight of the hopper and the total weight of the hopper and the powdery raw materials. The controller is electrically connected with the weighing sensor and the screw feeder; the controller can control the spiral rotating speed of the spiral feeder according to the detection value of the weighing sensor so as to adjust the discharging amount of the powdery raw materials within the preparation time.

Description

Technical Field

[0001] This invention relates to the field of solid materials technology, and in particular to a powdered raw material feeding system and method. Background Technology

[0002] AMPS is an additive used in the preparation of plugging agents for oil extraction. During the raw material preparation process, it is added to the reactor in solid powder form for dissolution and mixing. AMPS additive is a white powder with strong hygroscopicity, prone to caking, and chemically stable at room temperature. Solid powder cannot be precisely controlled using methods similar to liquid metering pumps. The preparation of powdered substances requires manual weighing by the operator beforehand, followed by quantitative addition, with one unit quantity prepared at a time in batches. Due to the slow dissolution process, operators must continuously monitor and adjust the dissolution process over extended periods, making automated preparation impossible. Summary of the Invention

[0003] This application provides a powdered raw material feeding system and method, which to some extent solves the technical problem in related technologies that require operators to continuously monitor the dissolution and preparation process for a long time and make adjustments, making it impossible to achieve automatic preparation.

[0004] In a first aspect, embodiments of this application provide a powdered raw material feeding system, comprising:

[0005] A hopper and a support frame, wherein the hopper is supported and disposed in the support frame;

[0006] A feeding device is used to convey powdered raw materials into the hopper;

[0007] A weighing sensor is used to detect the weight of the hopper and the total weight of the hopper and the powdered raw material;

[0008] A screw feeder is connected to the outlet of the hopper;

[0009] The controller is electrically connected to the weighing sensor and the screw feeder;

[0010] The controller can control the screw speed of the screw feeder based on the detection value of the weighing sensor, so as to adjust the output amount of the powdered raw material within the configured time.

[0011] In some embodiments, the hopper is provided with a support lug on its outer side, the weighing sensor is mounted on the support frame, and the support lug is used to support the weighing sensor.

[0012] In some embodiments, the feeding device includes a feeding station and a conveyor. The feeding station contains the powdered raw material. One end of the conveyor is connected to the outlet of the feeding station, and the other end is connected to the inlet of the hopper, so as to transport the powdered raw material in the feeding station to the hopper.

[0013] In some embodiments, the conveyor makes an angle greater than 60° with the horizontal plane.

[0014] In some embodiments, the feeding device further includes the dust collector bag, which is disposed on top of the feeding station.

[0015] In some embodiments, the system further includes a stirring screw for stirring the powdered raw material in the hopper.

[0016] In some embodiments, the system further includes a gas balance pipe, one end of which is connected to the inner cavity of the feeding station and the other end of which is connected to the hopper.

[0017] In some embodiments, the system further includes a base plate, on which the support frame and the feeding device are both disposed.

[0018] Secondly, embodiments of this application provide a method for feeding powdered raw materials, the method being implemented by the powdered raw material feeding system described above, the method comprising:

[0019] The weighing sensor detects the weight of the hopper to obtain an initial detection value;

[0020] The feeding device conveys the powdered raw material into the hopper, and the weighing sensor detects the total weight of the hopper and the powdered raw material to obtain the final detection value;

[0021] Obtain the required amount and preparation time of the powdered raw material;

[0022] The controller calculates the screw speed of the screw feeder based on the initial detection value, the final detection value, the required amount of powdered raw material, and the configuration time.

[0023] The controller controls the screw feeder to reach the screw speed so that the output of the powdered raw material reaches the configured requirement within the configured time.

[0024] In some implementations, in the step where the controller calculates the screw speed of the screw feeder based on the initial detection value, the final detection value, the required amount of powdered raw material, and the configuration time, the screw speed is calculated according to the following formula:

[0025]

[0026] Where: V is the screw rotation speed, Q1 is the final detection value, Q1 is the initial detection value, T is the configuration time, D is the screw diameter, L is the distance between two adjacent screw blades, K is the material filling coefficient, and ρ is the material bulk density.

[0027] The beneficial effects of this application are as follows:

[0028] This application provides a powdered raw material feeding system and method. By incorporating a weighing sensor to detect the weight of the hopper and the total weight of the hopper and the powdered raw material, and by controlling the screw speed of the screw feeder based on the weighing sensor's readings, the output of the powdered raw material within a specified time can be adjusted. Therefore, in the process of preparing oil extraction plugging agents, the powdered raw material feeding system and method provided in this application can achieve automatic batching of AMPS additives, eliminating the need for operators to monitor the dissolution and preparation process for extended periods, thus reducing the workload of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0030] Figure 1 This is a schematic diagram of the structure of the powdered raw material feeding system provided in the embodiments of this application.

[0031] Figure 2 This is a schematic flowchart of a powdered raw material feeding method provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100-Powdered raw material feeding system, 110-Hopper, 120-Support frame, 130-Feeding device, 131-Feeding station, 132-Conveyor, 133-Dust collector bag, 140-Weighing sensor, 150-Screw feeder, 160-Agitating screw, 170-Gas balance pipe, 180-Electrical control box, 190-Base plate. Detailed Implementation

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0038] Combine Figure 1 This application provides a powdered raw material feeding system 100, including a hopper 110, a support frame 120, a feeding device 130, a weighing sensor 140, a screw feeder 150, and a controller. The support frame 120 provides mounting or support for at least other components of the powdered raw material feeding system 100. The hopper 110 is supported within the support frame 120, and the screw feeder 150 is connected to the outlet of the hopper 110. The feeding device 130 conveys the powdered raw material into the hopper 110. The weighing sensor 140 detects the weight of the hopper 110 and the total weight of the hopper 110 and the powdered raw material. The controller is electrically connected to the weighing sensor 140 and the screw feeder 150; wherein the controller can control the screw speed of the screw feeder 150 based on the detection value of the weighing sensor 140 to adjust the output amount of the powdered raw material within a specified time.

[0039] The weighing sensor 140 can detect the overall weight of the hopper 110 in real time. When the powdered raw material feeding system 100 is just started, there is no powdered raw material in the hopper 110. At this time, the detection value of the weighing sensor 140 is the weight of the hopper 110 itself. When the powdered raw material feeding system 100 is in working condition and the feeding device 130 has delivered the powdered raw material into the hopper 110, the detection value of the weighing sensor 140 is the weight of the hopper 110 itself plus the weight of the powdered raw material.

[0040] The screw feeder 150 is a new generation product integrating stable flow conveying, weighing, and quantitative control of powder materials. It is suitable for continuous metering and batching of powder materials in various industrial production environments. The screw feeder 150 can utilize any existing equipment; its structure will not be described in detail here. The powdered raw material in the hopper 110 enters the screw feeder 150 through the outlet of the hopper 110 and then flows out through the outlet of the screw feeder 150. Of course, a device for receiving the powdered raw material can be installed below the outlet of the screw feeder 150.

[0041] The detection signal from the weighing sensor 140 is sent to the controller in real time. The controller calculates and controls the screw speed of the screw feeder 150 based on the detection value of the weighing sensor 140 to adjust the output of the powdered raw material within the preparation time. In the process of preparing oil extraction plugging agent, the powdered raw material feeding system 100 and method provided in this application can realize the automatic batching of AMPS additives without the need for operators to track the dissolution and preparation for a long time, thus reducing the workload of operators.

[0042] It should be noted that the powdered raw material feeding system 100 provided in this application embodiment can be applied to any process that requires the preparation of powdered raw materials, and is not limited to the preparation of oil extraction plugging agents. Furthermore, the powdered raw materials in this application embodiment can be any powdered raw material, and are not limited to AMPS additives.

[0043] In some embodiments, the outer side of the hopper 110 is provided with a support lug, and the weighing sensor 140 is disposed on the support frame 120, with the support lug supporting the weighing sensor 140.

[0044] The hopper 110 is supported in the support frame 120 by the lugs, and the weighing sensor 140 is located between the lugs and the support frame 120, so that the weighing sensor 140 can detect the overall weight of the hopper 110.

[0045] To make the detection values ​​of the weighing sensors 140 more accurate, multiple weighing sensors 140 can be provided. Specifically, multiple lugs are provided on the outer side of the hopper 110, and a weighing sensor 140 is provided between each lug and the support frame 120. The weight detected by the weighing sensor 140 is the weight of the hopper 110 in its area, and the sum of the detection values ​​of multiple weighing sensors 140 is the total weight of the hopper 110.

[0046] In some embodiments, the feeding device 130 includes a feeding station 131 and a conveyor 132. The feeding station 131 contains powdered raw materials. One end of the conveyor 132 is connected to the outlet of the feeding station 131, and the other end is connected to the inlet of the hopper 110, so as to transport the powdered raw materials in the feeding station 131 to the hopper 110.

[0047] AMPS additives are typically packaged in 25kg bags. Feeding station 131 is used for bag breaking and feeding. The outlet of feeding station 131 is located at the bottom of feeding station 131, and one side of feeding station 131 also has a feeding port and a cover plate that flips over and is set at the feeding port. When small bags of material need to be broken and enter the next process, the operator places the AMPS additive packaging bag on a support and pushes it into feeding station 131, closes the cover plate. When the limit switch detects that the cover plate is closed, the AMPS additive packaging bag is broken by a scraper set in feeding station 131. The AMPS additive in the packaging bag falls into the conveyor 132 at the bottom of feeding station 131 by gravity, and then enters the hopper 110 through the conveyor 132.

[0048] Specifically, the conveyor 132 can be a tubular chain conveyor 132, with a circulating conveyor of steel discs and chains inside the conveyor 132.

[0049] In some implementations, in order to save overall equipment space and facilitate on-site layout, the angle between the conveyor 132 and the horizontal plane is greater than 60°.

[0050] The feeding station 131 can be set on one side of the support frame 120, and the conveyor 132 is set between the feeding station 131 and the hopper 110. The conveyor 132 is a rod-shaped mechanism. When the angle between the conveyor 132 and the horizontal plane is greater than 60°, the horizontal length of the conveyor 132 can be shorter, thereby saving the overall space occupied by the equipment and facilitating on-site layout.

[0051] In some embodiments, in order to achieve dust-free operation, the feeding device 130 also includes a dust collector bag 133, and the dust collector bag 133 and the dust collector fan are disposed on top of the feeding station 131.

[0052] During the operation of the powdered raw material feeding system 100, a small amount of dust will be discharged from the gap between the feeding port and the cover plate. If the interval between bag breaking is short during long-term continuous feeding, the powdered raw material cannot enter the conveyor 132 in time, thereby increasing the dust emission and causing adverse environmental impact. Therefore, a dust collector bag 133 is installed. The dust collector bag 133 can collect and filter dust, intercept large pieces of material and foreign objects, ensure that the particles that meet the requirements are discharged, and that the exhaust gas after dust removal meets the emission standards, satisfying on-site occupational health and environmental protection requirements.

[0053] In addition, the feeding device 130 may also include a dust collector fan and a solenoid valve. The dust collector fan provides a negative pressure environment to draw outside air into the dust collector bag 133 for filtration. The solenoid valve controls the compressed air to periodically backflush the dust collected in the dust collector bag 133 into the conveyor 132, preventing waste of additive materials. It should be noted that the compressed air can be provided by the factory's public utility compressed air network.

[0054] In some embodiments, in order to improve the agglomeration of AMPS additives, the system also includes a stirring screw 160 for stirring the powdered raw materials in the hopper 110.

[0055] The stirring of the stirring screw 160 can improve the agglomeration of additive materials in the hopper 110, allowing the material to be discharged evenly from the outlet of the hopper 110. The stirring screw 160 can effectively eliminate the arching, clogging and adhesion of additive materials, thereby solving the problem of difficult material discharge from the hopper.

[0056] In addition, the stirring screw 160 can rotate slowly to reduce the metering interference of the stirring balance weighing sensor 140.

[0057] In some embodiments, the system also includes a gas balance pipe 170, one end of which is connected to the inner cavity of the feeding station 131 and the other end of which is connected to the hopper 110.

[0058] Since both conveyor 132 and hopper 110 are enclosed devices, when AMPS additive material enters hopper 110, the gas inside hopper 110 needs to be discharged to ensure smooth material feeding by conveyor 132. The gas balance pipe 170 can ensure gas pressure balance between hopper 110 and feeding station 131.

[0059] In some embodiments, the system also includes a base plate 190, a support frame 120 and a feeding device 130, all disposed on the base plate 190.

[0060] The feeding device 130 can be set on one side of the support frame 120. Both the support frame 120 and the feeding device 130 are set on the base plate 190, which can improve the integration and form an integrated device for overall transportation, installation and commissioning.

[0061] In some embodiments, the system further includes an electrical control box 180, which is fixedly mounted on the support frame 120. The electrical control box 180 can realize automatic control and monitoring of electrical equipment. Through program control within the controller, the electrical control box 180 can perform switching, protection, and monitoring of electrical equipment. For example, when electrical equipment malfunctions, the electrical control box 180 can promptly detect and take measures to handle the situation, avoiding the resulting dangers and losses.

[0062] Under the control of the electrical control box 180 and the controller DCS or PLC logic, the weighing sensor 140 and the screw feeder 150 complete the precise control of the feeding amount to realize automated formulation. That is, when it is necessary to increase or decrease the AMPS additive, the variable frequency motor of the variable frequency discharge screw can be used to speed up or decrease the speed.

[0063] It should be noted that in the prior art, the preparation of powdered raw materials requires two platforms to be set up on the dissolving tank to house the feeding station 131 and metering equipment, resulting in a large footprint. However, the powdered raw material feeding system 100 provided in this embodiment only requires one platform, thus saving upper space and civil engineering costs. Furthermore, the dust generated by manual feeding does not meet environmental protection requirements and wastes materials; the powdered raw material feeding system 100 provided in this embodiment can achieve dust-free discharge, solving the environmental problem.

[0064] Based on the same inventive concept, this application also provides a method for feeding powdered raw materials, which is implemented by the powdered raw material feeding system 100 described above, in conjunction with... Figure 1 and Figure 2 The method includes:

[0065] S1: Weighing sensor 140 detects the weight of hopper 110 to obtain an initial detection value.

[0066] The weighing sensor 140 can detect the overall weight of the hopper 110 in real time. When the powdered raw material feeding system 100 is just started, there is no powdered raw material in the hopper 110. At this time, the detection value of the weighing sensor 140 is the weight of the hopper 110 itself, that is, the initial detection value.

[0067] S2: The feeding device 130 conveys the powdered raw material into the hopper 110, and the weighing sensor 140 detects the total weight of the hopper 110 and the powdered raw material to obtain the final detection value.

[0068] When the powdered raw material feeding system 100 is in operation, and the feeding device 130 has delivered the powdered raw material into the hopper 110, the detection value of the weighing sensor 140 is the weight of the hopper 110 itself plus the weight of the powdered raw material, which is the final detection value.

[0069] S3: Obtain the required quantity and preparation time of the powdered raw materials.

[0070] Downstream configuration requirements and configuration time can be manually input and set via the DCS control panel and transmitted to the controller, and can be adjusted in batches as needed.

[0071] S4: The controller calculates the screw speed of the screw feeder 150 based on the initial detection value, the final detection value, the required amount of powdered raw materials, and the configuration time.

[0072] The weighing sensor 140 and the screw feeder 150 form a feedback control loop. Based on the downstream configuration demand, configuration time, initial detection value, and final detection value, the screw feeder speed is controlled by frequency conversion to adjust the output amount of the powdered raw material within the configuration time, thereby realizing the automatic preparation of the powdered raw material.

[0073] Specifically, the screw speed can be calculated using the following formula:

[0074]

[0075] Where: V is the screw rotation speed, Q1 is the final detection value, Q1 is the initial detection value, T is the configuration time, D is the screw diameter, L is the distance between two adjacent screw blades, K is the material filling coefficient, and ρ is the material bulk density.

[0076] S5: The controller controls the screw feeder 150 to reach the screw speed so that the output of powdered raw materials reaches the required amount within the configured time.

[0077] After calculating the screw speed of the screw feeder 150, the controller controls the screw feeder 150 to reach the required screw speed, thereby changing the discharge speed of the powdered raw material and ensuring that the discharge amount of the powdered raw material reaches the required amount within the specified time. In other words, by using the powdered raw material feeding system 100 and method provided in this application during the preparation of oil extraction plugging agents, automatic batching of AMPS additives can be achieved, eliminating the need for operators to monitor the dissolution and preparation process for extended periods, thus reducing the workload of operators.

[0078] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0079] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A powdered raw material feeding system, characterized in that: include: A hopper and a support frame, wherein the hopper support is arranged in the support frame; A feeding device, used for conveying powdered raw materials into the hopper; A weighing sensor, used to detect the weight of the hopper and the total weight of the hopper and the powdered raw material; A screw feeder connected to the outlet of the hopper; A controller, electrically connected to the weighing sensor and the screw feeder; The controller can control the screw speed of the screw feeder according to the detection value of the weighing sensor to adjust the discharge amount of the powdered raw material within a configured time.

2. The powdered raw material feeding system according to claim 1, characterized in that: A support ear is arranged on the outer side of the hopper, the weighing sensor is arranged on the supporting frame, and the support ear is supported and arranged on the weighing sensor.

3. The powdered raw material feeding system according to claim 1, characterized in that: The feeding device includes a feeding station and a conveyor. The feeding station is provided with the powdered raw material. One end of the conveyor is connected to the outlet of the feeding station, and the other end is connected to the inlet of the hopper to transport the powdered raw material in the feeding station to the hopper.

4. The powdered raw material feeding system according to claim 1, characterized in that: The angle between the conveyor and the horizontal plane is greater than 60°.

5. The powdered raw material feeding system according to claim 3, characterized in that: The feeding device also includes the dust removal bag, and the dust removal bag is arranged on the top of the feeding station.

6. The powdered raw material feeding system according to any one of claims 1 to 5, characterized in that: The system further comprises a stirring screw rod, wherein the stirring screw rod is used for stirring the powdered raw material in the hopper.

7. The powdered raw material feeding system according to any one of claims 1 to 5, characterized in that: The system further comprises a gas balance pipe, one end of which is in communication with the inner cavity of the feeding station, and the other end of which is in communication with the hopper.

8. The powdered raw material feeding system according to any one of claims 1 to 5, characterized in that: The system also includes a bottom plate, and the support frame and the feeding device are both arranged on the bottom plate.

9. A method for feeding a powdered raw material, characterized in that: The method is implemented by the powdered raw material feeding system according to any one of claims 1 to 8, and the method comprises: The weighing sensor detects the weight of the hopper to obtain an initial detection value; The feeding device conveys the powdered raw material into the hopper, and the weighing sensor detects the total weight of the hopper and the powdered raw material to obtain a final detection value; Obtaining the required amount and time of configuration of the powdered raw material; The controller calculates the screw speed of the screw feeder according to the initial detection value, the final detection value, the configuration requirement of the powdered raw material and the configuration time; The controller controls the screw feeder to reach the screw speed so that the discharge amount of the powdered raw material reaches the configuration requirement within the configuration time.

10. The powdery raw material feeding method according to claim 9, characterized in that: In the step of calculating the screw speed of the screw feeder according to the initial detection value, the final detection value, the configuration requirement of the powdered raw material and the configuration time, the controller calculates the screw speed according to the following formula: Among them: V is the screw speed, Q1 is the final detection value, Q1 is the initial detection value, T is the configuration time, D is the screw diameter, L is the distance between two adjacent screw blades, K is the material filling coefficient, and ρ is the material stacking density.

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