Automatic preparation device, method and electronic equipment for methanol solution

Abstract

The present application proposes an automatic preparation device, method, electronic device and storage medium for methanol solution, which belongs to the technical field of methanol solution preparation. The device includes a first container, a second container, a mixing container, a third container and a PLC control system. Among them, the first container is used to hold raw material methanol, and the second container is used to hold deionized water. The mixing container is connected to the first container through a first pipe, and is connected to the second container through a second pipe. A first pump is provided on the first pipe, and the first pump is connected to the first pipe; a second pump is provided on the second pipe, and the second pump is connected to the second pipe. The third container is connected to the mixing container and is used to hold the prepared methanol solution; the third container is also connected to the rear-end hydrogen production device, and is used to provide the prepared methanol solution to the rear-end hydrogen production device. The PLC control system is electrically connected to the first pump and the second pump. The automatic preparation device can realize the automatic and accurate preparation of methanol solution and improve the preparation efficiency of methanol solution.

Description

Technical Field

[0001] The present application relates to the technical field of methanol solution preparation, and in particular to an automatic methanol solution preparation device, method, electronic equipment and storage medium. Background Art

[0002] In the production process of methanol hydrogen production equipment, methanol solution with qualified concentration needs to be prepared. The traditional method uses manual and intermittent preparation of methanol solution. This method has complex process and equipment, high labor intensity, and the concentration of methanol solution is greatly affected by human factors, resulting in low preparation efficiency of methanol solution and easy errors in the concentration of prepared methanol solution. Summary of the invention

[0003] The main purpose of the embodiments of the present application is to provide an automatic preparation device, method, electronic device and storage medium for methanol solution. The purpose is to control the first pump to deliver raw material methanol to the mixing container at a first target flow rate and control the second pump to deliver deionized water to the mixing container at a second target flow rate through a PLC control system, so as to achieve automatic and accurate preparation of methanol solution and improve the preparation efficiency of methanol solution.

[0004] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides an automatic preparation device for a methanol solution, which is used to be connected to a back-end hydrogen production device, and the device comprises:

[0005] A first container is used to contain raw material methanol;

[0006] A second container is used to hold deionized water;

[0007] A mixing container is connected to the first container through a first pipeline and connected to the second container through a second pipeline; a first pump is provided on the first pipeline, the first pump is connected to the first pipeline, and is used to transport the raw material methanol to the mixing container through the first pipeline; a second pump is provided on the second pipeline, the second pump is connected to the second pipeline, and is used to transport the deionized water to the mixing container through the second pipeline;

[0008] A third container, connected to the mixing container, for containing the prepared methanol solution, and the third container is also connected to the rear-end hydrogen production device, for providing the prepared methanol solution to the rear-end hydrogen production device;

[0009] A PLC control system is electrically connected to the first pump and the second pump, and is used to perform the following operations:

[0010] According to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the rear-end hydrogen production device for hydrogen production, a first target flow rate of the raw methanol to be transported by the first pump and a second target flow rate of the deionized water to be transported by the second pump are calculated;

[0011] The rotation speed of the first pump is controlled so that the instantaneous flow rate of the raw methanol delivered by the first pump to the mixing container is the first target flow rate, and the rotation speed of the second pump is controlled so that the instantaneous flow rate of the deionized water delivered by the second pump to the mixing container is the second target flow rate.

[0012] In one embodiment of the present application, the automatic dispensing device further comprises a first flow detection device and a second flow detection device;

[0013] The first flow detection device is disposed on the first pipeline and is used to detect a first flow rate of the raw material methanol delivered by the first pump to the mixing container;

[0014] The second flow rate detection device is disposed on the second pipeline, and is used to detect a second flow rate of the deionized water delivered by the second pump to the mixing container.

[0015] In one embodiment of the present application, the PLC control system is also electrically connected to the first flow detection device and the second flow detection device, and the PLC control system is also used to:

[0016] Taking the first target flow rate as a target value and the first flow rate as an actual value to perform PID closed-loop control, so as to adjust the rotation speed of the first pump so that the first flow rate is consistent with the first target flow rate;

[0017] The second target flow rate is used as a target value, and the second flow rate is used as an actual value to perform PID closed-loop control to adjust the rotation speed of the second pump so that the second flow rate is consistent with the second target flow rate.

[0018] In one embodiment of the present application, the PLC control system includes a first frequency converter, a second frequency converter and a PLC controller, the first frequency converter and the second frequency converter are both electrically connected to the PLC controller, the first frequency converter is electrically connected to the first pump, the second frequency converter is electrically connected to the second pump, and the PLC controller is electrically connected to the first flow detection device and the second flow detection device;

[0019] The first frequency converter is used to adjust the speed of the first pump by adjusting the operating frequency of the first pump;

[0020] The second frequency converter is used to adjust the speed of the second pump by adjusting the operating frequency of the second pump;

[0021] The PLC controller is used to:

[0022] The first target flow rate is used as the target value, and the first flow rate is used as the actual value for PID closed-loop control, so as to send a first control signal to the first frequency converter and a second control signal to the second frequency converter, so that the first frequency converter adjusts the operating frequency of the first pump according to the first control signal so that the first flow rate is consistent with the first target flow rate, and so that the second frequency converter adjusts the operating frequency of the second pump according to the second control signal so that the second flow rate is consistent with the second target flow rate.

[0023] In one embodiment of the present application, the PLC control system calculates the first target flow rate of the raw methanol to be transported by the first pump and the second target flow rate of the deionized water to be transported by the second pump according to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be transported to the rear-end hydrogen production device to produce hydrogen, including:

[0024] Calculate the first target flow rate of the raw methanol that the first pump needs to transport according to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device to produce hydrogen;

[0025] A second target flow rate of the deionized water that the second pump needs to deliver is calculated based on the first target flow rate and the target concentration of the methanol solution to be prepared.

[0026] In one embodiment of the present application, the PLC control system calculates the first target flow rate of the raw methanol to be transported by the first pump according to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device to produce hydrogen, and is executed by the following formula:

[0027] ;

[0028] In the formula, represents the first target flow, Indicates the rated flow rate, represents the target concentration of the methanol solution to be prepared, represents the concentration of the raw material methanol, represents the production load of the back-end hydrogen production device, Indicates the concentration adjustment factor.

[0029] In one embodiment of the present application, the PLC control system calculates the second target flow rate of the deionized water that the second pump needs to deliver according to the first target flow rate and the target concentration of the methanol solution to be prepared by the following formula:

[0030] ;

[0031] In the formula, represents the second target flow, represents the first target flow, represents the target concentration of the methanol solution to be prepared.

[0032] To achieve the above-mentioned purpose, a second aspect of the embodiment of the present application provides an automatic preparation method of a methanol solution, which is performed based on the automatic preparation device provided in any embodiment of the present application, and the method includes:

[0033] According to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device for hydrogen production, a first target flow rate of the raw methanol to be transported by the first pump and a second target flow rate of the deionized water to be transported by the second pump are calculated;

[0034] The rotation speed of the first pump is controlled so that the instantaneous flow rate of the raw methanol delivered by the first pump to the mixing container is the first target flow rate, and the rotation speed of the second pump is controlled so that the instantaneous flow rate of the deionized water delivered by the second pump to the mixing container is the second target flow rate.

[0035] To achieve the above-mentioned purpose, the third aspect of an embodiment of the present application proposes an electronic device, which includes a memory and a processor, the memory stores a computer program, and the processor implements the method described in the second aspect when executing the computer program.

[0036] To achieve the above-mentioned purpose, the fourth aspect of the embodiments of the present application proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method described in the second aspect is implemented.

[0037] In the technical solution provided in the embodiment of the present application, the automatic preparation device of the methanol solution includes a first container, a second container, a mixing container, a third container and a PLC control system. Among them, the first container is used to hold the raw material methanol, and the second container is used to hold the deionized water. The mixing container is connected to the first container through a first pipe, and is connected to the second container through a second pipe. A first pump is provided on the first pipe, and the first pump is connected to the first pipe; a second pump is provided on the second pipe, and the second pump is connected to the second pipe. The third container is connected to the mixing container, and is used to hold the prepared methanol solution; the third container is also connected to the rear-end hydrogen production device, and is used to provide the prepared methanol solution to the rear-end hydrogen production device. The PLC control system is electrically connected to the first pump and the second pump, and is used to calculate the first target flow rate of raw methanol to be transported by the first pump and the second target flow rate of deionized water to be transported by the second pump according to the concentration of raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the rear-end hydrogen production device for hydrogen production, so as to control the first pump to transport raw methanol to the mixing container at the first target flow rate, and control the second pump to transport deionized water to the mixing container at the second target flow rate, so as to realize automatic and accurate preparation of methanol solution, improve the preparation efficiency of methanol solution, and enable instant preparation according to hydrogen production needs.

[0038] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0040] Figure 1 It is a structural schematic diagram of the automatic preparation device of the methanol solution provided in Example 1 of the present application.

[0041] Figure 2 It is a structural schematic diagram of the automatic preparation device of the methanol solution provided in Example 2 of the present application.

[0042] Figure 3 It is a structural schematic diagram of the automatic preparation device of the methanol solution provided in Example 3 of the present application.

[0043] Figure 4 It is a flow chart of the automatic preparation method of the methanol solution provided in the embodiment of the present application.

[0044] Figure 5The embodiment of the present application provides a flowchart of the steps for calculating the first target flow rate of raw methanol to be transported by the first pump and the second target flow rate of deionized water to be transported by the second pump based on the concentration of raw methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be transported to the rear-end hydrogen production device for hydrogen production.

[0045] Figure 6 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0046] Reference numerals:

[0047] Back-end hydrogen production device-10; first container-100; second container-200; mixing container-300; third container-400; PLC control system-500; first pipeline-101; first pump-102; first flow detection device-103; second pipeline-201; second pump-202; second flow detection device-203; first frequency converter-510; second frequency converter-520; PLC controller-530. DETAILED DESCRIPTION

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present application will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0049] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present application. However, those skilled in the art will appreciate that the technical solution of the present application may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring the present application and making the various aspects of the present application obscure.

[0050] Some of the blocks shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microprocessor devices.

[0051] A fuel cell is an efficient power generation device that converts the chemical energy of fuel and oxidant into electrical energy directly through electrochemical reaction without going through the combustion process. It has high conversion efficiency and almost no pollutant emissions. The power generation system powered by fuel cells can protect the environment and solve urgent problems. However, hydrogen is a flammable and explosive substance, which is extremely difficult to liquefy and compress, and difficult to store and transport. At the current technical stage, compared with pure hydrogen fuel, methanol reforming on-site hydrogen production and purification technology is a practical fuel cell hydrogen source. This hydrogen source has high energy density, high energy conversion efficiency, and liquid fuel is easy to transport, replenish and store, and it also has obvious advantages in terms of economy. The problem is that the methanol solution of the methanol reforming fuel cell is usually prepared in advance according to demand, but the methanol solution fuel ratio required by the reformers of different types and different manufacturers is different. The methanol solution of the prior art cannot usually be prepared in real time, and the flexibility is poor. In addition, the methanol solution is generally prepared manually and intermittently. This method has complex processes and equipment and high labor intensity. The concentration of the methanol solution is greatly affected by human factors, resulting in low preparation efficiency of the methanol solution and easy errors in the concentration of the prepared methanol solution.

[0052] Based on this, an embodiment of the present application proposes an automatic preparation device for methanol solution, which aims to control the first pump to deliver raw methanol to a mixing container at a first target flow rate, and control the second pump to deliver deionized water to the mixing container at a second target flow rate through a PLC control system, thereby realizing automatic and precise preparation of methanol solution and improving the preparation efficiency of methanol solution.

[0053] Embodiment 1

[0054] Reference Figure 1 , Figure 1 Schematic diagram of the structure of the automatic preparation device of the methanol solution provided in Example 1 of the present application. Figure 1As shown, the automatic preparation device of methanol solution is used to be connected to the rear-end hydrogen production device 10, and the automatic preparation device of methanol solution includes a first container 100, a second container 200, a mixing container 300, a third container 400 and a PLC control system 500. Among them, the first container 100 is used to hold raw material methanol, and the second container 200 is used to hold deionized water. The mixing container 300 is connected to the first container 100 through a first pipeline 101, and is connected to the second container 200 through a second pipeline 201. A first pump 102 is provided on the first pipeline 101, and the first pump 102 is connected to the first pipeline 101, and is used to transport the raw material methanol in the first container 100 to the mixing container 300 through the first pipeline 101. A second pump 202 is provided on the second pipeline 201, and the second pump 202 is connected to the second pipeline 201, and is used to transport the deionized water in the second container 200 to the mixing container 300 through the second pipeline 201. The third container 400 is connected to the mixing container 300, and is used to hold the prepared methanol solution. The third container 400 is also connected to the rear-end hydrogen production device 10 and is used to provide the prepared methanol solution to the rear-end hydrogen production device 10 .

[0055] The PLC control system 500 is electrically connected to the first pump 102 and the second pump 202, and is used to calculate the first target flow rate of raw methanol to be delivered by the first pump 102 and the second target flow rate of deionized water to be delivered by the second pump 202 according to the concentration of raw methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be delivered to the rear-end hydrogen production device for hydrogen production. This can control the first pump 102 to deliver raw methanol to the mixing container 300 at the first target flow rate, and control the second pump 202 to deliver deionized water to the mixing container 300 at the second target flow rate, thereby achieving automatic and accurate preparation of the methanol solution, improving the preparation efficiency of the methanol solution, and being able to prepare it immediately according to the hydrogen production demand.

[0056] Embodiment 2

[0057] Reference Figure 2 , Figure 2 Schematic diagram of the structure of the automatic preparation device of methanol solution provided in Example 2 of the present application. Figure 2As shown, the automatic preparation device of methanol solution is used to be connected to the rear-end hydrogen production device 10, and the automatic preparation device of methanol solution includes a first container 100, a second container 200, a mixing container 300, a third container 400 and a PLC control system 500. Among them, the first container 100 is used to hold raw material methanol, and the second container 200 is used to hold deionized water. The mixing container 300 is connected to the first container 100 through a first pipeline 101, and is connected to the second container 200 through a second pipeline 201. A first pump 102 and a first flow detection device 103 are provided on the first pipeline 101. The first pump 102 is connected to the first pipeline 101, and is used to transport the raw material methanol in the first container 100 to the mixing container 300 through the first pipeline 101. The first flow detection device 103 is used to detect the first flow rate of the first pump 102 to transport the raw material methanol to the mixing container 300, that is, the actual flow rate of the first pump 102 to transport the raw material methanol to the mixing container 300 can be detected in real time. The second pipeline 201 is provided with a second pump 202 and a second flow detection device 203. The second pump 202 is connected to the second pipeline 201, and is used to transport the deionized water in the second container 200 to the mixing container 300 through the second pipeline 201. The second flow detection device 203 is used to detect the second flow rate of the deionized water transported by the second pump 202 to the mixing container 300, that is, the actual flow rate of the deionized water transported by the second pump 202 to the mixing container 300 can be detected in real time. The third container 400 is connected to the mixing container 300, and is used to contain the prepared methanol solution. The third container 400 is also connected to the rear-end hydrogen production device 10, and is used to provide the prepared methanol solution to the rear-end hydrogen production device 10.

[0058] The PLC control system 500 is electrically connected to the first pump 102 and the second pump 202, and the PLC control system 500 is also electrically connected to the first flow detection device 103 and the second flow detection device 203. Thus, the PLC control system is used to:

[0059] According to the concentration of raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device for hydrogen production, the first target flow rate of raw methanol to be transported by the first pump 102 and the second target flow rate of deionized water to be transported by the second pump 202 are calculated;

[0060] Obtaining a first flow rate of the first pump 102 conveying raw material methanol to the mixing container 300 detected by the first flow detection device 103, and obtaining a second flow rate of the second pump 202 conveying deionized water to the mixing container 300 detected by the second flow detection device 203;

[0061] The first target flow rate is used as the target value, and the first flow rate is used as the actual value to perform PID closed-loop control to adjust the rotation speed of the first pump 102 so that the first flow rate is consistent with the first target flow rate;

[0062] The second target flow rate is used as the target value, and the second flow rate is used as the actual value to perform PID closed-loop control to adjust the rotation speed of the second pump so that the second flow rate is consistent with the second target flow rate.

[0063] In the embodiment of the present application, both the first flow detection device and the second flow detection device can use flow meters, such as turbine flow meters, electromagnetic flow meters, volume flow meters, etc., which can measure fluid flow. Since the PLC control system 500 is also electrically connected to the first flow detection device 103 and the second flow detection device 203, the PLC control system 500 can obtain the first flow rate of the first pump 102 conveying raw material methanol to the mixing container 300 detected by the first flow detection device 103, and can obtain the second flow rate of the second pump 202 conveying deionized water to the mixing container 300 detected by the second flow detection device 203. At the same time, since the PLC control system 500 can calculate the first target flow rate of raw material methanol that the first pump 102 needs to convey and the second target flow rate of deionized water that the second pump 202 needs to convey according to the concentration of raw material methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be conveyed to the rear-end hydrogen production device for hydrogen production, it is possible to obtain the first target flow rate of raw material methanol that the first pump 102 needs to convey and the second target flow rate of deionized water that the second pump 202 needs to convey. Thus, the PLC control system 500 can use the first target flow rate as the target value, and use the first flow rate as the actual value to perform PID closed-loop control to adjust the rotation speed of the first pump 102 so that the first flow rate is consistent with the first target flow rate. And use the second target flow rate as the target value, and use the second flow rate as the actual value to perform PID closed-loop control to adjust the rotation speed of the second pump so that the second flow rate is consistent with the second target flow rate. Thus, through PID closed-loop control, the detected first flow rate (actual flow rate) can be made consistent with the calculated first target flow rate and the detected second flow rate (actual flow rate) can be made consistent with the calculated second target flow rate. That is, the actual flow value can be made consistent with the calculated target flow value, thereby improving the accuracy of the concentration of the prepared methanol solution.

[0064] Embodiment 3

[0065] Reference Figure 3 , Figure 3 Schematic diagram of the structure of the automatic preparation device of methanol solution provided in Example 3 of the present application. Figure 3As shown, the automatic preparation device of methanol solution is used to be connected to the rear-end hydrogen production device 10, and the automatic preparation device of methanol solution includes a first container 100, a second container 200, a mixing container 300, a third container 400 and a PLC control system 500. Among them, the first container 100 is used to hold raw material methanol, and the second container 200 is used to hold deionized water. The mixing container 300 is connected to the first container 100 through a first pipeline 101, and is connected to the second container 200 through a second pipeline 201. A first pump 102 and a first flow detection device 103 are provided on the first pipeline 101. The first pump 102 is connected to the first pipeline 101, and is used to transport the raw material methanol in the first container 100 to the mixing container 300 through the first pipeline 101. The first flow detection device 103 is used to detect the first flow rate of the first pump 102 to transport the raw material methanol to the mixing container 300, that is, the actual flow rate of the first pump 102 to transport the raw material methanol to the mixing container 300 can be detected in real time. The second pipeline 201 is provided with a second pump 202 and a second flow detection device 203. The second pump 202 is connected to the second pipeline 201, and is used to transport the deionized water in the second container 200 to the mixing container 300 through the second pipeline 201. The second flow detection device 203 is used to detect the second flow rate of the deionized water transported by the second pump 202 to the mixing container 300, that is, the actual flow rate of the deionized water transported by the second pump 202 to the mixing container 300 can be detected in real time. The third container 400 is connected to the mixing container 300, and is used to contain the prepared methanol solution. The third container 400 is also connected to the rear-end hydrogen production device 10, and is used to provide the prepared methanol solution to the rear-end hydrogen production device 10.

[0066] The PLC control system 500 includes a first frequency converter 510, a second frequency converter 520 and a PLC controller 530. The first frequency converter 510 and the second frequency converter 520 are both electrically connected to the PLC controller 530. The first frequency converter 510 is electrically connected to the first pump 102, the second frequency converter 520 is electrically connected to the second pump 202, and the PLC controller 530 is electrically connected to the first flow detection device 103 and the second flow detection device 203. The first frequency converter 510 is used to adjust the speed of the first pump 102 by adjusting the operating frequency of the first pump 102. The second frequency converter 520 is used to adjust the speed of the second pump 202 by adjusting the operating frequency of the second pump 202. The PLC controller 530 is used to perform the following steps:

[0067] According to the concentration of raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device for hydrogen production, the first target flow rate of raw methanol to be transported by the first pump 102 and the second target flow rate of deionized water to be transported by the second pump 202 are calculated;

[0068] Obtaining a first flow rate of the first pump 102 conveying raw material methanol to the mixing container 300 detected by the first flow detection device 103, and obtaining a second flow rate of the second pump 202 conveying deionized water to the mixing container 300 detected by the second flow detection device 203;

[0069] PID closed-loop control is performed with the first target flow rate as the target value and the first flow rate as the actual value to send a first control signal to the first frequency converter 510 and a second control signal to the second frequency converter 520, so that the first frequency converter 510 adjusts the operating frequency of the first pump 102 according to the first control signal so that the first flow rate is consistent with the first target flow rate, and so that the second frequency converter 520 adjusts the operating frequency of the second pump 202 according to the second control signal so that the second flow rate is consistent with the second target flow rate.

[0070] In the embodiment of the present application, the PLC control system 500 includes a first frequency converter 510, a second frequency converter 520 and a PLC controller 530. The first frequency converter 510 and the second frequency converter 520 are both electrically connected to the PLC controller 530. The first frequency converter 510 is electrically connected to the first pump 102, the second frequency converter 520 is electrically connected to the second pump 202, and the PLC controller 530 is electrically connected to the first flow detection device 103 and the second flow detection device 203. Thus, the PLC controller 530 can obtain that the PLC controller 530 is electrically connected to the first flow detection device 103 and the second flow detection device 203. At the same time, since the PLC controller 530 can calculate the first target flow rate of the raw material methanol that needs to be transported by the first pump 102 and the second target flow rate of the deionized water that needs to be transported by the second pump 202 according to the concentration of the raw material methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be transported to the rear-end hydrogen production device for hydrogen production, the first target flow rate of the raw material methanol that needs to be transported by the first pump 102 and the second target flow rate of the deionized water that needs to be transported by the second pump 202 can be obtained. Thus, the PLC controller 530 can use the first target flow rate as the target value and the first flow rate as the actual value to perform PID closed-loop control, so as to send a first control signal to the first frequency converter 510 and a second control signal to the second frequency converter 520, so that the first frequency converter 510 can adjust the operating frequency of the first pump 102 according to the first control signal to adjust the speed of the first pump 102, so that the first flow rate can be consistent with the first target flow rate by adjusting the operating frequency of the first pump 102. At the same time, the second frequency converter 520 can adjust the operating frequency of the second pump 202 according to the second control signal to adjust the speed of the second pump 202, so that the second flow rate can be consistent with the second target flow rate by adjusting the operating frequency of the second pump 202. Thus, the accuracy of the concentration of the prepared methanol solution can be improved.

[0071] Reference Figure 4 , Figure 4It is a flow chart of the automatic preparation method of the methanol solution provided in the embodiment of the present application, which is executed by the automatic preparation device of the methanol solution provided in any embodiment of the present application, including but not limited to steps S410 to S420.

[0072] Step S410, calculating a first target flow rate of the raw methanol to be delivered by the first pump and a second target flow rate of the deionized water to be delivered by the second pump according to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be delivered to the back-end hydrogen production device for hydrogen production;

[0073] Step S420, controlling the rotation speed of the first pump so that the instantaneous flow rate of the raw material methanol delivered by the first pump to the mixing container is the first target flow rate, and controlling the rotation speed of the second pump so that the instantaneous flow rate of the deionized water delivered by the second pump to the mixing container is the second target flow rate.

[0074] In the embodiment of the present application, the PLC control system 500 of the automatic preparation device of the methanol solution can calculate the first target flow rate of the raw material methanol to be delivered by the first pump 102 and the second target flow rate of the deionized water to be delivered by the second pump 202 according to the concentration of the raw material methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be delivered to the rear-end hydrogen production device for hydrogen production. Therefore, since the PLC control system 500 is electrically connected to the first pump 102 and the PLC control system 500 is electrically connected to the second pump 202, the PLC control system 500 can control the first pump 102 to deliver the raw material methanol to the mixing container 300 at the first target flow rate, and the PLC control system 500 can control the second pump 202 to deliver the deionized water to the mixing container 300 at the second target flow rate. Thus, the automatic and accurate preparation of the methanol solution can be achieved.

[0075] Reference Figure 5 , Figure 5 The embodiment of the present application provides a flowchart of the steps for calculating the first target flow rate of raw methanol to be transported by the first pump and the second target flow rate of deionized water to be transported by the second pump based on the concentration of raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device for hydrogen production, including but not limited to steps S510 to S520.

[0076] Step S510, calculating a first target flow rate of raw methanol to be transported by the first pump according to the concentration of raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate of the methanol solution to be transported to the back-end hydrogen production device for hydrogen production.

[0077] In the embodiment of the present application, the PLC control system 500 of the automatic preparation device of the methanol solution can calculate the first target flow rate of the raw methanol that needs to be transported by the first pump 102 according to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be transported to the rear-end hydrogen production device for hydrogen production. Specifically, it can be calculated by the following formula:

[0078] ;

[0079] In the formula, represents the first target flow, Indicates the rated flow rate, represents the target concentration of the methanol solution to be prepared, represents the concentration of raw methanol, represents the production load of the back-end hydrogen production unit, Indicates the concentration adjustment factor.

[0080] In the present application example, the concentration of raw material methanol is Fill in the information based on the concentration of the purchased raw material methanol. Methanol of different concentrations produced by different manufacturers can be used as raw material methanol. The rated flow rate required for the prepared methanol solution to produce hydrogen in the back-end hydrogen production unit is determined by the needs of the back-end hydrogen production unit. The target concentration of the methanol solution to be prepared is determined according to the needs of the back-end hydrogen production unit. For example, if the concentration of the methanol solution required by the back-end hydrogen production unit is C1, then the target concentration of the methanol solution to be prepared is C1. If the concentration of the methanol solution required by the back-end hydrogen production unit is C2, then the target concentration of the methanol solution to be prepared is C2. The concentration of the required methanol solution can be adjusted at any time according to production needs through the concentration adjustment coefficient. For example, the concentration of the methanol solution required for the first batch of hydrogen production is , that is, the target concentration of the methanol solution to be prepared is However, the concentration of methanol solution required for the second batch of hydrogen production is , that is, the concentration of the methanol solution required for the first batch of hydrogen production is different. At this time, it is only necessary to multiply the first target flow calculated in the first batch by the concentration adjustment coefficient to calculate the first target flow of the second batch, without having to re-enter all parameters according to the calculation method of the first target flow of the first batch. This can reduce the amount of calculation, increase the operation rate, and maximize the realization of the immediate production and supply of methanol solution. Among them, the concentration adjustment coefficient k can be the ratio of the adjusted concentration of the methanol solution to the target concentration of the methanol solution, that is, .

[0081] In the embodiment of the present application, since the automatic preparation device of the methanol solution is connected to the back-end hydrogen production device, it is used to instantly provide the back-end hydrogen production device with the methanol solution it needs. Therefore, the preparation process of the methanol solution can also instantly adjust the first target flow rate and the second target flow rate according to the production load of the back-end hydrogen production device. For example, when the production load of the back-end hydrogen production device is running at full load, that is, all the methanol solutions prepared in real time by the automatic preparation device need to be continuously transported to the back-end hydrogen production device. At this time, the production load is is 1. When the production load of the back-end hydrogen production device is not running at full load, such as the production load If it is 80%, it is necessary to adjust the first target flow rate of the prepared methanol solution for transporting the raw methanol accordingly, so as to realize the adaptive adjustment of the preparation of the methanol solution and the production load of the back-end hydrogen production device. That is, the automatic preparation device at the front end prepares the corresponding amount of methanol solution according to the amount of methanol solution required by the back-end hydrogen production device, so as to realize the instant supply of methanol solution.

[0082] In the embodiment of the present application, considering that part of the prepared methanol solution in the third container 400 is not delivered to the rear-end hydrogen production device, at this time, the prepared methanol solution in the third container 400 will volatilize after being stationary for a period of time, causing the concentration of the existing prepared methanol solution in the third container 400 to deviate from the target concentration of the methanol solution actually required to be prepared. At this time, if the first target flow rate of the first pump 102 in the subsequent preparation process is not adjusted, the concentration of the methanol solution finally mixed with the existing methanol solution will not meet the hydrogen production demand. Therefore, the embodiment of the present application can also correct the first target flow rate by the concentration adjustment coefficient until the concentration of the methanol solution after the newly prepared methanol solution is mixed with the existing methanol solution is the target concentration (i.e., the concentration required for hydrogen production is reached), and then the first pump 102 is controlled to deliver the raw methanol to the mixing container 300 at the first target flow rate. Among them, the concentration adjustment coefficient can be the ratio of the target concentration of the methanol solution to the concentration of the existing methanol solution.

[0083] It should be noted that the second target flow is calculated based on the first target flow. After the first target flow changes, the second target flow will also change accordingly.

[0084] Step S520, calculating a second target flow rate of deionized water that needs to be delivered by the second pump according to the first target flow rate and the target concentration of the methanol solution to be prepared.

[0085] In the embodiment of the present application, after the first target flow rate is calculated, the second target flow rate of the deionized water to be delivered by the second pump can be further calculated according to the first target flow rate and the target concentration of the methanol solution to be prepared, which can be specifically calculated by the following formula:

[0086] ;

[0087] In the formula, represents the second target flow, represents the first target flow, Indicates the target concentration of the methanol solution to be prepared.

[0088] In the embodiment of the present application, if the first target flow rate changes, the second target flow rate will also change accordingly, thereby achieving automatic and accurate preparation of the methanol solution.

[0089] See also Figure 6 , Figure 6 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0090] The processor 601 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0091] The memory 602 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 602 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 602, and the processor 601 calls and executes the automatic preparation method of the methanol solution in the embodiment of the present application;

[0092] Input / output interface 603, used to implement information input and output;

[0093] Communication interface 604, used to realize communication interaction between the device and other devices, which can be realized through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0094] A bus 605 that transmits information between various components of the device (e.g., processor 601, memory 602, input / output interface 603, and communication interface 604);

[0095] The processor 601 , the memory 602 , the input / output interface 603 and the communication interface 604 are connected to each other in communication within the device via a bus 605 .

[0096] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the automatic preparation method of the methanol solution is implemented.

[0097] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0098] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0099] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0100] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0101] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0102] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0103] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0104] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0105] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0106] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0107] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0108] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. An automatic preparation device for methanol solution, used to be connected to a rear-end hydrogen production device, characterized in that: The device comprises: A first container is used to contain raw material methanol; A second container is used to hold deionized water; A mixing container is connected to the first container through a first pipeline and connected to the second container through a second pipeline; a first pump is provided on the first pipeline, the first pump is connected to the first pipeline, and is used to transport the raw material methanol to the mixing container through the first pipeline; a second pump is provided on the second pipeline, the second pump is connected to the second pipeline, and is used to transport the deionized water to the mixing container through the second pipeline; A third container, connected to the mixing container, for containing the prepared methanol solution, and the third container is also connected to the rear-end hydrogen production device, for providing the prepared methanol solution to the rear-end hydrogen production device; A PLC control system is electrically connected to the first pump and the second pump, and is used to perform the following operations: According to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device for hydrogen production, the first target flow rate of the raw methanol to be transported by the first pump and the second target flow rate of the deionized water to be transported by the second pump are calculated, wherein the first target flow rate is calculated by the formula Calculated, where Q m represents the first target flow rate, Q0 represents the rated flow rate, C m represents the target concentration of the methanol solution to be prepared, C0 represents the concentration of the raw methanol, represents the production load of the rear-end hydrogen production device, and k represents the concentration adjustment coefficient; The rotation speed of the first pump is controlled so that the instantaneous flow rate of the raw methanol delivered by the first pump to the mixing container is the first target flow rate, and the rotation speed of the second pump is controlled so that the instantaneous flow rate of the deionized water delivered by the second pump to the mixing container is the second target flow rate.

2. The device according to claim 1, characterized in that The automatic dispensing device also includes a first flow detection device and a second flow detection device; The first flow detection device is disposed on the first pipeline and is used to detect a first flow rate of the raw material methanol delivered by the first pump to the mixing container; The second flow rate detection device is disposed on the second pipeline, and is used to detect a second flow rate of the deionized water delivered by the second pump to the mixing container.

3. The device according to claim 2, characterized in that The PLC control system is also electrically connected to the first flow detection device and the second flow detection device, and the PLC control system is also used for: Taking the first target flow rate as a target value and the first flow rate as an actual value to perform PID closed-loop control, so as to adjust the rotation speed of the first pump so that the first flow rate is consistent with the first target flow rate; The second target flow rate is used as a target value, and the second flow rate is used as an actual value to perform PID closed-loop control to adjust the rotation speed of the second pump so that the second flow rate is consistent with the second target flow rate.

4. The device according to claim 2 or 3, characterized in that The PLC control system includes a first frequency converter, a second frequency converter and a PLC controller, the first frequency converter and the second frequency converter are both electrically connected to the PLC controller, the first frequency converter is electrically connected to the first pump, the second frequency converter is electrically connected to the second pump, and the PLC controller is electrically connected to the first flow detection device and the second flow detection device; The first frequency converter is used to adjust the speed of the first pump by adjusting the operating frequency of the first pump; The second frequency converter is used to adjust the speed of the second pump by adjusting the operating frequency of the second pump; The PLC controller is used to: The first target flow rate is used as the target value, and the first flow rate is used as the actual value for PID closed-loop control, so as to send a first control signal to the first frequency converter and a second control signal to the second frequency converter, so that the first frequency converter adjusts the operating frequency of the first pump according to the first control signal so that the first flow rate is consistent with the first target flow rate, and so that the second frequency converter adjusts the operating frequency of the second pump according to the second control signal so that the second flow rate is consistent with the second target flow rate.

5. The device according to claim 1, characterized in that The PLC control system calculates the first target flow rate of the raw methanol to be delivered by the first pump and the second target flow rate of the deionized water to be delivered by the second pump according to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be delivered to the back-end hydrogen production device for hydrogen production, including: Calculate the first target flow rate of the raw methanol that the first pump needs to transport according to the concentration of the raw methanol, the target concentration of the methanol solution to be prepared, and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device to produce hydrogen; A second target flow rate of the deionized water that the second pump needs to deliver is calculated based on the first target flow rate and the target concentration of the methanol solution to be prepared.

6. The device according to claim 1 or 5, characterized in that The PLC control system calculates the second target flow rate of the deionized water that the second pump needs to deliver according to the first target flow rate and the target concentration of the methanol solution to be prepared by the following formula: In the formula, Q w represents the second target flow, Q m represents the first target flow, C m represents the target concentration of the methanol solution to be prepared.

7. A method for automatically preparing a methanol solution, performed based on the device according to any one of claims 1 to 6, characterized in that: The method comprises: According to the concentration of raw methanol, the target concentration of the methanol solution to be prepared and the rated flow rate required for the methanol solution to be transported to the back-end hydrogen production device for hydrogen production, the first target flow rate of the raw methanol to be transported by the first pump and the second target flow rate of the deionized water to be transported by the second pump are calculated, wherein the first target flow rate is calculated by the formula Calculated, where Q m represents the first target flow rate, Q0 represents the rated flow rate, C m represents the target concentration of the methanol solution to be prepared, C0 represents the concentration of the raw methanol, represents the production load of the rear-end hydrogen production device, and k represents the concentration adjustment coefficient; The rotation speed of the first pump is controlled so that the instantaneous flow rate of the raw methanol delivered by the first pump to the mixing container is the first target flow rate, and the rotation speed of the second pump is controlled so that the instantaneous flow rate of the deionized water delivered by the second pump to the mixing container is the second target flow rate.

8. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the method according to claim 7 when executing the computer program.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to claim 7 is implemented.

Images