Accurate continuous feeding system and feeding method
By designing two sets of feeding pipes and liquid level meters in fine chemical production, combining the metering components of the feeding pump and flowmeter, the problem of inaccuracy of feeding volume caused by metering offset in the feeding method of a single set of metering pump and flowmeter is solved. Real-time accurate monitoring of feeding volume is achieved, reducing the loss of unqualified products.
Patent Information
- Application Number
- CN202411415213.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-01-10
AI Technical Summary
The existing single-group metering pumps and flowmeters are loaded in fine chemical production. Since the flowmeter is prone to metering deviation, the accuracy of the feeding volume cannot be monitored in real time, resulting in loss of unqualified products.
Design an accurate continuous feeding system, through two sets of feeding pipes and corresponding liquid level meters, combined with the feeding pump and flowmeter meter meter metering components, the four-fold metering operation is realized to judge the accuracy of feeding volume in real time, and reduce the flowmeter offset The impact of
Through the four-fold metering operation, the offset of the flowmeter can be effectively judged, real-time accuracy of the feeding volume can be achieved, and the loss of unqualified products can be reduced.
Smart Images
Figure CN119281225A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of fine chemical production, and in particular to a precise and continuous feeding system and feeding method. Background Art
[0002] In the prior art, in fine chemical production, precise and continuous feeding involves a wide range of applications, mainly involving the precise and quantitative addition of materials into a designated container or reactor. This feeding method is very common in the fields of chemical, petrochemical, food, and pharmaceutical industries. The traditional feeding method is mainly to connect a group of metering pumps and flow meters in series on the upper part of the pipeline to achieve continuous feeding. The flow meter will cause metering deviation after long-term use, which is often reflected in the product quality stage. It has a strong lag, resulting in a large loss of unqualified products, making this method unable to judge the accuracy of the feeding amount in real time. Summary of the invention
[0003] The problem to be solved by the present application is that the existing feeding metering method of a single set of metering pumps and flow meters is unable to determine the accuracy of the feeding amount in real time because the flow meter is prone to metering deviation and thus has a strong hysteresis monitoring defect.
[0004] To solve the above technical problems, the present application provides a precise continuous feeding system, comprising a feeding pipe and a reactor connected by a pipeline, a feeding pump and a flow meter are sequentially connected in series in the upper part of the pipeline between the feeding pipe and the reactor, the number of feeding pipes is two groups, a liquid level gauge for real-time display of the liquid level is arranged on one side of the feeding pipe, and a metering component capable of measuring the discharge amount of the feeding pipe is also added to the upper part of the pipeline, the metering component comprises a feeding pump and a flow meter, and the feeding pump and the flow meter are sequentially connected in series in the upper part of the pipeline in sequence.
[0005] Since the feeding system of the present application is designed with two sets of feeding pipes with liquid level meters and a metering component composed of a feeding pump and a flow meter, it is possible to realize a quadruple metering operation of the feeding amount through the two sets of liquid level meters and the flow meter, and then determine the offset of the flow meter to provide real-time feedback on the accuracy of the feeding amount, thereby solving the problem of the feeding metering method of the prior art with a single set of metering pumps and flow meters, in which the flow meter is prone to metering offset and has a strong lag monitoring defect, making it impossible for this method to determine the accuracy of the feeding amount in real time. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 Schematic diagram of the process flow of the embodiment.
[0007] In the figure: 1. first feeding pipe; 2. first liquid level meter; 3. first flow meter; 4. first feeding pump; 5. second feeding pipe; 6. second liquid level meter; 7. second flow meter; 8. second feeding pump; 9. reactor. DETAILED DESCRIPTION
[0008] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Example
[0009] The present application relates to a precise continuous feeding system, such as Figure 1 As shown, the feeding system includes a feeding pipe and a reactor 9 connected by a pipeline, and a feeding pump and a flow meter are serially connected in sequence in the upper part of the pipeline between the feeding pipe and the reactor 9, so that the raw materials in the feeding pipe are pumped into the reactor 9 by means of the feeding pump. In order to improve the accuracy of raw material filling, the number of feeding pipes is two groups, which are divided into a first feeding pipe 1 and a second feeding pipe 5, and a level gauge for real-time display of the liquid level is arranged on one side of the feeding pipe, and the level gauge is divided into a first level gauge 2 and a second level gauge 6. In order to further improve the accuracy of feeding, a metering component capable of metering the discharge amount of the feeding pipe is also provided in the upper part of the pipeline.
[0010] The metering component includes a feeding pump and a flow meter, which are connected in series on the upper part of the pipeline in sequence, so that the raw materials in the feeding pipe are extracted by the feeding pump, and the raw materials extracted by the feeding pump are metered by the flow meter.
[0011] There are two groups of metering components, one of which is arranged at the upper part of the pipeline between the feeding pipes, and the other is arranged between the feeding pipes and the reactor 9. The feeding pump is divided into a first feeding pump 4 and a second feeding pump 8, and the flow meter is divided into a first flow meter 3 and a second flow meter 7.
[0012] A paddle with a rod driven by a motor is vertically arranged inside the reaction kettle 9 to stir the raw materials to prevent the raw materials from being stratified or precipitated.
[0013] In order to improve the accuracy of the liquid level meter, the feeding pipe is a cylindrical pipe structure, and the liquid level change can be converted into the actual feeding amount through volume conversion operation.
[0014] The feeding method is as follows: (1) The slope of the curve of the time variation of the liquid level in the first feeding pipe 1 is -k, which is a constant value when the feeding is normal and no material is added; (2) The first feeding pipe 1 is indirectly supplemented with raw materials through a raw material tank or other means. When adding raw materials normally, the liquid level in the first feeding pipe 1 decreases normally, and the liquid level in the first feeding pipe 1 remains unchanged; (3) The feed pump adjusts the pump power in real time according to the flow meter reading to stabilize the flow rate required by the process; (4) The first flow meter 3 and the second flow meter 7 are set to the same feeding flow rate, and the real-time feeding accuracy can be judged by comparing the real-time flow rates of the first flow meter 3 and the second flow meter 7; (5) The slope -k of the curve of the time change of the liquid level in the first feeding tube 1 should remain unchanged. The accuracy of feeding in a short period of time can be judged by the change of the liquid level in the feeding tube; (6) The liquid level of the second feeding pipe 5 liquid level gauge should remain unchanged. The accuracy of feeding in a short period of time can be judged by the change of the liquid level in the feeding pipe; Method for judging the accuracy of feeding: (1) The flow rate displayed by the first flow meter 3 is higher / lower than the normal feeding value, the liquid level of the first feeding pipe 1 drops / rises, and the power of the first feeding pump 4 is too high / low. Adjust the power of the first feeding pump 4 to the first flow meter 3 to the normal feeding value; (2) The flow rate displayed by the second flow meter 7 is higher / lower than the normal feeding value, the liquid level of the second feeding pipe 5 drops / rises, and the power of the first feeding pump 4 is too high / low. Adjust the power of the first feeding pump 4 to the normal feeding value of the first flow meter 3; (3) The first flow meter 3 and the second flow meter 7 show normal feeding values, the liquid level of the second feeding pipe 5 drops / rises, and the slope -k of the curve of the time change of the liquid level of the first feeding pipe 1 does not change, which means that the second flow meter 7 is faulty; at this time, the reading of the second flow meter 7 should be abandoned, and the liquid level of the second feeding pipe 5 should be kept consistent with the previous one to achieve accurate feeding. If the feeding amount needs to be adjusted, the first flow meter 3 shall prevail; (4) The first flow meter 3 and the second flow meter 7 display normal feeding values, the liquid level in the second feeding pipe 5 decreases / increases, and the time change of the liquid level in the first feeding pipe 1 is recorded as the slope -k change of the curve, which indicates that the first flow meter 3 is faulty; at this time, the reading of the first flow meter 3 should be abandoned, and the liquid level in the second feeding pipe 5 can be kept consistent with the previous one to achieve accurate feeding. If the feeding amount needs to be adjusted, the second flow meter 7 shall prevail.
[0015] In summary, by designing two sets of feeding pipes and supplemented by corresponding liquid level meters and metering components, quadruple metering operation can be achieved, which can effectively determine the offset of the flow meter and provide real-time feedback on the accuracy of the feeding amount.
[0016] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.
[0017] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).
[0018] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.
[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A precise continuous feeding system, comprising a feeding pipe and a reaction kettle connected by a pipeline, characterized in that: A feeding pump and a flow meter are connected in series in sequence on the upper part of the pipeline between the feeding pipe and the reactor. There are two groups of feeding pipes. A level gauge for real-time display of the liquid level is arranged on one side of the feeding pipe. A metering component that can measure the discharge amount of the feeding pipe is also provided on the upper part of the pipeline. The metering component includes a feeding pump and a flow meter. The feeding pump and the flow meter are connected in series in sequence on the upper part of the pipeline.
2. The precise continuous feeding system according to claim 1, characterized in that: There are two groups of metering components, one of which is arranged at the upper part of the pipeline between the feeding pipes, and the other is arranged between the feeding pipes and the reactor.
3. The precise continuous feeding system according to claim 2, characterized in that: The feeding pipe is divided into a first feeding pipe and a second feeding pipe, the liquid level meter is divided into a first liquid level meter and a second liquid level meter, the feeding pump is divided into a first feeding pump and a second feeding pump, and the flow meter is divided into a first flow meter and a second flow meter.
4. A feeding method, based on the precise continuous feeding system according to claim 3, characterized in that: (1) The flow rate displayed by the first flow meter is higher / lower than the normal feeding value, the liquid level of the first feeding pipe drops / rises, and the power of the first feeding pump is too high / low. Adjust the power of the first feeding pump to the first flow meter to the normal feeding value; (2) The flow rate displayed by the second flow meter is higher / lower than the normal feeding value, the liquid level of the second feeding pipe drops / rises, and the power of the first feeding pump is too high / low. Adjust the power of the first feeding pump to the first flow meter to the normal feeding value; (3) The first flow meter and the second flow meter display normal feeding values, the liquid level of the second feeding pipe drops / rises, and the slope -k of the curve of the time change of the liquid level of the first feeding pipe does not change, which means that the second flow meter is faulty. At this time, the second flow meter reading should be abandoned, and the liquid level of the second feeding pipe can be kept consistent with the previous one to achieve accurate feeding. If the feeding amount needs to be adjusted, the first flow meter shall prevail. (4) If the first flow meter and the second flow meter display normal feeding values, the liquid level in the second feeding pipe drops / rises, and the time change of the liquid level in the first feeding pipe is recorded as the slope -k change of the curve, it means that the first flow meter is faulty. At this time, the first flow meter reading should be abandoned, and the liquid level in the second feeding pipe can be kept consistent with the previous reading to achieve accurate feeding. If the feeding amount needs to be adjusted, the second flow meter shall prevail.
5. The precise continuous feeding system according to claim 4, characterized in that: The time variation of the liquid level in the first feeding pipe is recorded as a curve with a slope of -k, which is a constant value when the feeding remains unchanged and no material is replenished.
6. The precise continuous feeding system according to claim 4, characterized in that: The first feeding pipe indirectly supplements raw materials through the raw material tank or other means. During normal addition, the liquid level in the first feeding pipe decreases normally and remains unchanged.
7. The precise continuous feeding system according to claim 4, characterized in that: The feed pump adjusts the pump power in real time according to the flow meter reading to stabilize the flow rate required by the process.
8. The precise continuous feeding system according to claim 4, characterized in that: The first flow meter and the second flow meter are set with the same feeding flow rate, and the real-time feeding accuracy can be judged by comparing the real-time flow rates of the first flow meter and the second flow meter.
9. The precise continuous feeding system according to claim 4, characterized in that: The slope -k of the curve recording the time change of the liquid level in the first feeding tube should remain unchanged. The accuracy of feeding in a short period of time can be judged by the change of the liquid level in the feeding tube.
10. The precise continuous feeding system according to claim 4, characterized in that: The liquid level of the second feeding pipe level gauge should remain unchanged. The feeding accuracy in a short period of time can be judged by the change of the feeding pipe liquid level.