Automatic control system and method for liquid material unloading

Abstract

The invention discloses an automatic control system for unloading a liquid material, and the system comprises a monitoring system which is disposed on an unloading pipeline and is used for measuring the index parameters of the liquid material in the unloading pipeline; and the data acquisition and analysis system is used for acquiring the index parameters of the monitoring system, processing according to the index parameters and judging whether unloading conditions are met or not. The invention further discloses an automatic control method for liquid material unloading. A data acquisition and analysis system (DAS system) is adopted to control automatic unloading of liquid materials and monitor a plurality of online analyzers at the same time, so that manual operation can be reduced, and the intelligent level of equipment can be improved.

Description

Technical Field

[0001] The present invention relates to a feeding technology for a benzene hydrogenation device, and more particularly to an automatic control system and method for unloading liquid materials. Background Art

[0002] Currently, the unloading of incoming liquid materials from benzene hydrogenation units at steel companies is typically manually controlled. Operators connect the unloading pipes, wait for laboratory analysis results to confirm compliance, and then manually open the unloading valves to begin unloading. This entire process is manually controlled. Sampling and analysis of liquid material from tank trucks takes approximately four hours, and unloading each tank truck takes approximately 50 minutes. This is a time-consuming process and requires significant manual effort for offline sampling. Manual sampling, offline analysis, and manual unloading are time-consuming and labor-intensive, and are inevitably subject to environmental influences, increasing logistics risks.

[0003] With the deepening of smart manufacturing in modern enterprises, the requirements for equipment automation and informatization are gradually increasing, and more advanced control methods need to be adopted. Therefore, it is necessary to establish a special raw material unloading automation control system.

[0004] Existing patent applications, such as patent publication number CN102770229A, disclose a single-branch oil pipe quality analysis and control system. This system zons the production line for equipment electrical control and single-branch tracking; adds a single-branch oil pipe production information collection device; connects the primary PLCs and their host computers of each individual unit on the production line to a server via Ethernet, and establishes a database system. The server accesses each unit's primary PLC via Ethernet using OPC, and accesses each unit's host computer via a database. This technical solution, based on single-branch pipe tracking in oil pipe production, optimizes pre-set process parameters for each process step using a feedforward or feedback method, and generates a single-branch oil pipe quality analysis report. This invention helps eliminate single-branch pipe quality defects, resolves quality objections, and meets the practical needs of high-end users for record-keeping and traceability of production information for each individual pipe. It also facilitates optimizing process equipment operating parameters and developing high-value-added products.

[0005] For example, patent publication number CN104635668A discloses an automatic control system for steelmaking inspection and testing production, which includes an L2 control system, an automatic analysis control system, a pneumatic sample delivery control system, an analyzer computer, and an analysis data storage system; the L2 control system is used as a process control system for each production unit in steelmaking production, and the automatic analysis control system is used to control the automatic control of the analysis system; the pneumatic sample delivery control system is used as a pneumatic sample delivery control system for each production unit in steelmaking, and the analyzer computer receives sample information issued by the automatic analysis control system and automatically uploads the sample information to the analysis data storage system via the network; this technical solution can save a lot of auxiliary time, shorten the steelmaking cycle, and generate considerable economic benefits.

[0006] For example, the non-patent document "Tyre Crane Remote Control System - Overview of Automatic Loading and Unloading System" (Ye Haiqing, "Henan Science and Technology" 2021, (11): P16-19) introduces the composition, working principle and functions of the automatic loading and unloading system in the tire crane remote control system, and elaborates on the specific functions and structures of each control unit, providing a theoretical basis for the remote control and automation construction and transformation of tire cranes in port areas.

[0007] The above patented and non-patented technologies only introduce the control system and do not involve operations such as automatic control of raw material unloading and remote monitoring of multiple online analyzers. Summary of the Invention

[0008] In response to the defects in the prior art, the purpose of the present invention is to provide an automated control system and method for liquid material unloading. A data acquisition and analysis system (DAS system) is used to control the automatic unloading of liquid materials and simultaneously monitor multiple online analyzers, which can not only reduce manual operations but also improve the intelligence level of the equipment.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] The first aspect of the present invention provides an automated control system for liquid material unloading, comprising:

[0011] A monitoring system is provided on the discharge pipe and is used to measure index parameters of the liquid material in the discharge pipe;

[0012] The data acquisition and analysis system is used to obtain the index parameters of the monitoring system, process the data according to the index parameters and determine whether the unloading conditions are met.

[0013] Preferably, the monitoring system includes a liquid density meter, a water analyzer, a chromatographic analyzer and a total sulfur / total nitrogen analyzer.

[0014] Preferably, the monitoring system establishes data communication with the data acquisition and analysis system via Ethernet.

[0015] Preferably, the automatic control system further comprises:

[0016] Cameras are used to obtain the tanker's license plate information.

[0017] Preferably, the data acquisition and analysis system is control-connected to the pneumatic unloading valve on the unloading pipeline.

[0018] The second aspect of the present invention provides an automated control method for unloading liquid materials. The automated control system for unloading liquid materials provided in the first aspect of the present invention is used to obtain various index parameters of the liquid material and process the uploaded measurement data in real time to determine whether the unloading conditions are met. At the same time, a data report is generated in combination with the license plate information of the tank truck and various index parameters for uploading to other required systems.

[0019] Preferably, the automatic control method specifically includes the following steps:

[0020] S1, the unloading personnel connects the unloading hose and opens the tanker valve. At this time, the liquid density meter generates a measurement value. When the measurement value of the liquid density meter obtained by the data acquisition and analysis system exceeds a set threshold, the data acquisition and analysis system determines that the unloading operation of the liquid material has begun. At the same time, the data acquisition and analysis system controls the start of the chromatographic analyzer to measure the components of the liquid material.

[0021] S2, the data acquisition and analysis system obtains the license plate information of the tank truck through the camera and records it in the data storage library. At the same time, the circulation pump is started. After a period of circulation, the chromatograph and the total sulfur / total nitrogen analyzer are started to perform measurements;

[0022] S3, the data acquisition and analysis system compares the measured values ​​of the liquid density meter, the water analyzer, the chromatograph, and the total sulfur / total nitrogen analyzer to see whether they meet the qualified requirements of the raw material quality indicators. If they meet the requirements, the on-site indicator green light is on, and the pneumatic unloading valve is automatically opened to carry out the unloading operation. If they do not meet the requirements, the on-site indicator red light is on, and the circulation pump, the chromatograph, and the total sulfur / total nitrogen analyzer are stopped, and the pneumatic unloading valve is closed;

[0023] S4, on-site staff dispose of unqualified raw materials.

[0024] The present invention provides an automated control system and method for liquid material unloading. By adopting a DAS system to control the automatic unloading of liquid materials and monitor multiple online analytical instruments, full automation is achieved, which improves the speed of liquid material quality control and the intelligence level of equipment, and saves a lot of labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the on-site layout of the automation control system of the present invention;

[0026] Figure 2 It is a schematic diagram of the structural framework of the automatic control system of the present invention;

[0027] Figure 3 It is a flow chart of the automatic control method of the present invention. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solutions of the present invention, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0029] Combine Figure 1 and Figure 2 As shown, the present invention provides an automatic control system for liquid material unloading, comprising:

[0030] The monitoring system is installed on the discharge pipe 1 and is used to measure various index parameters of the liquid material in the discharge pipe 1.

[0031] The data acquisition and analysis system 2 is used to obtain various indicator parameters of the monitoring system, process them according to the indicator parameters and determine whether the unloading conditions are met.

[0032] The monitoring system includes a liquid density meter 3 , a water analyzer 4 , a chromatographic analyzer 5 and a total sulfur / total nitrogen analyzer 6 .

[0033] The monitoring system establishes data communication with the data acquisition and analysis system 2 via Ethernet.

[0034] The automatic control system of the present invention further comprises:

[0035] The camera 7 is used to obtain the license plate information of the tank truck 8.

[0036] The data acquisition and analysis system 2 is controlled and connected to the pneumatic unloading valve 9 on the unloading pipeline 1 .

[0037] The automatic control system of the present invention uses the liquid density meter 3 installed on the unloading pipe 1 as a trigger, sets a density threshold, and automatically determines whether liquid material enters the unloading system.

[0038] The license plate information is acquired by the camera 7, transmitted to the data acquisition and analysis system 2 and recorded in the data repository.

[0039] The data acquisition and analysis system 2 controls the circulation pump 10 to start the chromatograph analyzer 5, automatically determines whether the quality of the liquid material meets the requirements of the purchased liquid material index, controls the opening of the pneumatic unloading valve 9, and automatically unloads the vehicle if it is qualified. If it is unqualified, it will alarm and automatically close the pneumatic unloading valve 9 for subsequent disposal.

[0040] Combine Figures 1 to 3 As shown, the present invention also provides an automated control method for unloading liquid materials. By adopting the automated control system for unloading liquid materials of the present invention, the data acquisition and analysis system 2 obtains various index parameters of the liquid materials measured by the monitoring system in real time through Ethernet, and processes the uploaded measurement data in real time to determine whether the unloading conditions are met. At the same time, it combines the license plate information of the tank truck and various index parameters to generate data reports for uploading to other required systems.

[0041] The automatic control method specifically includes the following steps:

[0042] S1, the unloading personnel connect the unloading hose 11 and open the tanker valve. At this time, the liquid density meter 3 generates a measurement value. When the data acquisition and analysis system obtains the liquid density meter measurement value exceeding the set threshold (for example, greater than 0.600g / cm 3 ), the data acquisition and analysis system 2 determines that the unloading operation of the liquid material has started. At the same time, the data acquisition and analysis system 2 controls the start of the chromatographic analyzer 5 to measure the components of the liquid material;

[0043] S2, the data acquisition and analysis system 2 obtains the license plate information of the tank truck 8 through the camera 7 and records it in the data storage library. At the same time, the circulation pump 10 is started. After a period of circulation, the chromatograph 5 and the total sulfur / total nitrogen analyzer 6 are started to measure and wait for the measurement results;

[0044] S3, the data acquisition and analysis system 2 compares the measured values ​​of the liquid density meter 3, the water analyzer 4, the chromatograph 5, and the total sulfur / total nitrogen analyzer 6 to see whether they meet the qualified requirements of the raw material quality indicators. If they meet the requirements, the on-site indicator green light is on and the pneumatic unloading valve 9 is automatically opened to carry out the unloading operation. If they do not meet the requirements, the on-site indicator red light is on and the circulation pump 10, the chromatograph 5, and the total sulfur / total nitrogen analyzer 6 are stopped and the pneumatic unloading valve 9 is closed.

[0045] S4, on-site staff dispose of unqualified raw materials. If unloading is required, the manager needs to enter the corresponding level password in the data collection and analysis system 2 to start the unloading process.

[0046] Example 1

[0047] Refer again Figure 3 As shown, the automatic control method of this embodiment specifically includes the following steps:

[0048] S1, the data acquisition and analysis system 2 measures the density through the liquid density meter 3 to determine that liquid material has entered the discharge pipe 1, and starts the automatic unloading step;

[0049] S2, data acquisition and analysis system 2 reads the license plate information and records it in the data repository;

[0050] S3, the data acquisition and analysis system 2 starts the circulation pump 10, and starts the chromatographic analyzer 5, the total sulfur / total nitrogen analyzer 6 and other online analysis equipment;

[0051] S4, the data acquisition and analysis system 2 determines whether the liquid material composition, density, moisture, total sulfur and other indicators exceed the standard. If so, an alarm is issued and the pneumatic unloading valve 9 is closed for subsequent processing;

[0052] S5, if the quality of the liquid material is judged to be qualified, the data acquisition and analysis system 2 records the analysis data of the liquid density meter 3, the chromatograph 5, and the total sulfur / total nitrogen analyzer 6, and the pneumatic unloading valve 9 is automatically opened to unload;

[0053] S6, when the liquid material unloading is about to be completed, the data acquisition and analysis system 2 determines that the unloading is completed.

[0054] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An automatic control system for liquid material unloading, characterized in that: include: A monitoring system is provided on the discharge pipe and is used to measure index parameters of the liquid material in the discharge pipe; The data acquisition and analysis system is used to obtain the index parameters of the monitoring system, process the data according to the index parameters and determine whether the unloading conditions are met.

2. The automatic control system for liquid material unloading according to claim 1 is characterized in that: The monitoring system includes a liquid density meter, a water analyzer, a chromatographic analyzer and a total sulfur / total nitrogen analyzer.

3. The automatic control system for liquid material unloading according to claim 2 is characterized in that: The monitoring system establishes data communication with the data acquisition and analysis system via Ethernet.

4. The automatic control system for liquid material unloading according to claim 1 is characterized in that: The automated control system further comprises: Cameras are used to obtain the tanker's license plate information.

5. The automatic control system for liquid material unloading according to claim 1 is characterized in that: The data acquisition and analysis system is control-connected to the pneumatic unloading valve on the unloading pipeline.

6. An automated control method for liquid material unloading, characterized in that: The automated control system for unloading liquid materials as described in any one of claims 1 to 5 is used to obtain various index parameters of the liquid material and process the uploaded measurement data in real time to determine whether the unloading conditions are met. At the same time, a data report is generated in combination with the tank truck's license plate information and various index parameters for uploading to other required systems.

7. The automatic control method for liquid material unloading according to claim 6, characterized in that: The automatic control method specifically comprises the following steps: S1, the unloading personnel connects the unloading hose and opens the tanker valve. At this time, the liquid density meter generates a measurement value. When the measurement value of the liquid density meter obtained by the data acquisition and analysis system exceeds a set threshold, the data acquisition and analysis system determines that the unloading operation of the liquid material has begun. At the same time, the data acquisition and analysis system controls the start of the chromatographic analyzer to measure the components of the liquid material. S2, the data acquisition and analysis system obtains the license plate information of the tank truck through the camera and records it in the data storage library. At the same time, the circulation pump is started. After a period of circulation, the chromatograph and the total sulfur / total nitrogen analyzer are started to perform measurements; S3, the data acquisition and analysis system compares the measured values ​​of the liquid density meter, the water analyzer, the chromatograph, and the total sulfur / total nitrogen analyzer to see whether they meet the qualified requirements of the raw material quality indicators. If they meet the requirements, the on-site indicator green light is on, and the pneumatic unloading valve is automatically opened to carry out the unloading operation. If they do not meet the requirements, the on-site indicator red light is on, and the circulation pump, the chromatograph, and the total sulfur / total nitrogen analyzer are stopped, and the pneumatic unloading valve is closed; S4, on-site staff dispose of unqualified raw materials.

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