Accurate continuous feeding system

Abstract

The utility model relates to the technical field of fine chemical production, in particular to an accurate continuous feeding system. The utility model provides an accurate continuous feeding system which comprises feeding pipes and a reaction kettle which are connected through a pipeline, the upper portion of the pipeline between the feeding pipes and the reaction kettle is sequentially connected with a feeding pump and a flow meter in series, the number of the feeding pipes is two, and a liquid level meter used for displaying the liquid level in real time is arranged on one side of each feeding pipe. A metering assembly capable of metering the discharging amount of the feeding pipe is additionally arranged on the upper portion of the pipeline and comprises a feeding pump and a flow meter, and the feeding pump and the flow meter are sequentially connected to the upper portion of the pipeline in series in sequence; according to the feeding system, due to the fact that the two sets of feeding pipes with the liquid level meters and the metering assembly composed of the feeding pump and the flow meter are designed, quadruple metering operation of the feeding amount can be achieved through the two sets of liquid level meters and the flow meter, and then the accuracy of the feeding amount is fed back in real time by judging the offset of the flow meter.

Description

Technical Field

[0001] The present application relates to the technical field of fine chemical production, and in particular to a precise continuous feeding system. Background Art

[0002] In the existing technology, in fine chemical production, precise continuous feeding involves a wide range of applications, mainly involving the precise and quantitative addition of materials into designated containers or reactors. This feeding method is very common in the fields of chemical, petrochemical, food, and pharmaceutical industries.

[0003] The traditional feeding method mainly involves connecting 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 hysteresis, resulting in a large loss of unqualified products, making this method unable to judge the accuracy of the feeding amount in real time. Utility Model Content

[0004] 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 has a strong hysteresis monitoring defect.

[0005] In order to solve the above technical problems, the present application provides a precise continuous feeding system, including a feeding pipe and a reactor connected by a pipeline, a feeding pump and a flow meter are connected in series in sequence in the upper part of the pipeline between the feeding pipe and the reactor, and there are two groups of feeding pipes. A liquid 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 added to the upper part of the pipeline. The metering component includes a feeding pump and a flow meter, and the feeding pump and the flow meter are connected in series in sequence in the upper part of the pipeline.

[0006] Since the feeding system of the present application is designed with two sets of feeding pipes with liquid level gauges and a metering component consisting 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 gauges and flow meters, and then judge 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 this method unable to judge the accuracy of the feeding amount in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Schematic diagram of the process flow of the embodiment.

[0008] In the figure: 1. first feeding pipe; 2. first liquid level gauge; 3. first flow meter; 4. first feeding pump; 5. second feeding pipe; 6. second liquid level gauge; 7. second flow meter; 8. second feeding pump; 9. reactor. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application. Example

[0010] This 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 connected in series in sequence on 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 measuring the discharge amount of the feeding pipe is also provided on the upper part of the pipeline.

[0011] 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.

[0012] There are two groups of metering components, one of which is arranged on 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.

[0013] A paddle with a rod driven by a motor is vertically arranged inside the reactor 9 to stir the raw materials and prevent the raw materials from being stratified or precipitated.

[0014] 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.

[0015] The feeding method is as follows:

[0016] (1) The slope of the curve of the time change 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;

[0017] (2) The first feeding pipe 1 is indirectly supplemented with raw materials through the raw material tank or other means. When adding raw materials normally, the liquid level in the first feeding pipe 1 drops normally, and the liquid level in the first feeding pipe 1 remains unchanged;

[0018] (3) The feed pump adjusts the pump power in real time according to the flow meter reading to stabilize the flow required by the process;

[0019] (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;

[0020] (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 time can be judged by the change of the liquid level in the feeding tube;

[0021] (6) The liquid level of the second feeding pipe 5 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;

[0022] Method for judging the accuracy of feeding:

[0023] (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 normal feeding value of the first flow meter 3;

[0024] (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;

[0025] (3) The first flow meter 3 and the second flow meter 7 display normal feeding values, the liquid level of the second feeding pipe 5 drops / rises, and the time change of the liquid level of the first feeding pipe 1 is recorded as the slope -k of the curve without 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 reading to achieve accurate feeding. If the feeding amount needs to be adjusted, the first flow meter 3 shall prevail;

[0026] (4) If the first flow meter 3 and the second flow meter 7 show normal feeding values, the liquid level in the second feeding pipe 5 drops / rises, and the time change of the liquid level in the first feeding pipe 1 is recorded as the slope -k change of the curve, it means that the first flow meter 3 has failed. At this time, the reading of the first flow meter 3 should be abandoned, and the liquid level in the second feeding pipe 5 should be kept consistent with the previous reading to achieve accurate feeding. If the feeding amount needs to be adjusted, the second flow meter 7 shall prevail.

[0027] In summary, by designing two sets of feeding pipes and supplementing them with corresponding liquid level gauges 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.

[0028] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0029] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0030] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, 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 depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0031] 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 them. 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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 reactor connected by a pipeline, characterized in that: A feeding pump and a flow meter are connected in series in the upper part of the pipeline between the feeding pipe and the reactor. There are two groups of feeding pipes. A liquid 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 added to the upper part of the pipeline.

2. The precise continuous feeding system according to claim 1, characterized in that 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.

3. The precise continuous feeding system according to claim 2, 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.

4. The precise continuous feeding system according to claim 1, characterized in that: The feeding pipe is divided into a first feeding pipe and a second feeding pipe.

5. The precise continuous feeding system according to claim 1, characterized in that: The liquid level gauge is divided into the first liquid level gauge and the second liquid level gauge.

6. The precise continuous feeding system according to claim 2, characterized in that: The feeding pump is divided into a first feeding pump and a second feeding pump.

7. The precise continuous feeding system according to claim 2, characterized in that: The flow meter is divided into a first flow meter and a second flow meter.

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