VCM converter internal catalyst operation time timing system based on DCS

Abstract

The utility model discloses a VCM converter internal catalyst operation time timing system based on a DCS. The VCM converter internal catalyst operation time timing system comprises a measuring module, a communication module, a distributed control system and a control terminal. The measurement module is configured in the VCM converter and is used for measuring running state information of an internal catalyst; the communication module is respectively connected with the measurement module and the distributed control system and is used for transmitting the running state information acquired by the measurement module to the distributed control system; the distributed control system is used for storing and determining the running time of the catalyst based on the running state information; the control terminal is connected with the distributed control system and used for controlling timing operation of the distributed control system. According to the utility model, automatic monitoring and accurate recording of the catalyst operation time can be realized, and the intelligent level and the management efficiency of chemical production are obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial automation technical field especially, relates to a VCM converter internal catalyst operation time timing system based on DCS. BACKGROUND

[0002] VCM (vinyl chloride) converter is the key equipment of vinyl chloride monomer production. Its inside is filled with catalyst as catalyst. The performance and stability of catalyst are directly related to the quality of final product and the efficiency of whole production process. In actual operation process, catalyst will gradually deactivate, which needs to be replaced regularly to ensure the efficient progress of conversion process.

[0003] However, the traditional catalyst replacement method usually depends on manual recording and estimation, or adopts fixed period replacement strategy. These methods have obvious defects, such as large error, slow response speed, lack of accurate operation time record. Such operation can cause catalyst to be replaced too early, thereby causing resource waste, or delayed replacement, which has negative impact on production process and reduces production efficiency. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a VCM converter internal catalyst operation time timing system based on DCS, so as to overcome the defects in the prior art. In order to realize the foregoing utility model purpose, the utility model adopts the technical scheme including:

[0005] The utility model provides a VCM converter internal catalyst operation time timing system based on DCS, including: measurement module, communication module, distributed control system, control terminal, measurement module is configured in VCM converter, is used for monitoring the operation state information of VCM converter internal catalyst, communication module is connected with measurement module and distributed control system respectively, is used for transmitting the operation state information that measurement module gathers to distributed control system, distributed control system is used for storage and based on operation state information, so as to determine the operation time of catalyst, control terminal is connected with distributed control system, is used for controlling the timing operation of distributed control system.

[0006] In some more specific schemes, the measurement module includes multiple groups of measurement structures, the measurement structure is arranged on the cover of the VCM converter and extends to the internal space of the VCM converter.

[0007] In some specific embodiments, the measurement structure comprises a first measurement device, a second measurement device, and a third measurement device, one end of the first measurement device is arranged on the cover of the VCM converter, the other end extends into the internal space of the VCM converter and keeps a first distance d1 from the cover, one end of the second measurement device is arranged on the cover of the VCM converter, the other end extends into the internal space of the VCM converter and keeps a second distance d2 from the cover, one end of the third measurement device is arranged on the cover of the VCM converter, the other end extends into the internal space of the VCM converter and keeps a third distance d3 from the cover, d1 < d2 < d3.

[0008] Further, 0 < d1 < h / 2, d2 = h / 2, h / 2 < d3 < h, h is the internal depth of the VCM converter.

[0009] Further, the measurement device is a thermocouple, comprising a measurement end and a reference end, the reference end is arranged on the cover of the VCM converter, and the measurement end is arranged in the internal space of the VCM converter to contact the catalyst.

[0010] In some specific embodiments, the measurement module comprises four groups of measurement structures, which are arranged at four corner positions of the cover of the VCM converter.

[0011] In some specific embodiments, the communication module comprises a serial server and at least one multifunctional transmitter, the multifunctional transmitter is connected with the measurement module and the serial server respectively, and the serial server is connected with the distributed control system, wherein the multifunctional transmitter receives the running state information from the measurement module and converts the running state information into a running signal, and the serial server receives and transmits the running signal to the distributed control system. Preferably, each four groups of measurement structures are connected with one multifunctional transmitter through addresses.

[0012] Further, the serial server is connected with the distributed control system through an RS-485 interface, and the multifunctional transmitter comprises an acquisition module and a conversion module, the acquisition module is connected with the measurement module and the conversion module respectively, wherein the acquisition module is used to acquire the running state information from the measurement module, and the conversion module is used to convert the running state information into a running signal.

[0013] In some specific embodiments, the distributed control system comprises an I / O module, a storage module, and a timing calculation block, the I / O module is connected with the communication module and is used to convert the running state information into a standard signal, the storage module is connected with the I / O module and is used to store the standard signal, and the timing calculation block is connected with the storage module and is used to call the standard signal in the storage module and determine the running time of the catalyst based on the standard signal.

[0014] Further, the timing operation block comprises a start timing module, a pause timing module and a reset time module; the operation terminal is provided with at least a start button, a stop button and a clear button; the start button is configured to be connected with the start timing module and is used to send a start timing instruction; the stop button is configured to be connected with the pause timing module and is used to send a stop timing instruction; and the clear button is configured to be connected with the reset time module and is used to send a reset time instruction.

[0015] Compared with the prior art, the utility model has at least the following advantages:

[0016] Firstly, the DCS-based VCM converter internal catalyst running time timing system provided by the utility model realizes automatic monitoring and accurate recording of catalyst running time through high-precision data acquisition and processing capacity of the distributed control system, and provides strong support for scientific replacement and life extension of the catalyst.

[0017] Secondly, the DCS-based VCM converter internal catalyst running time timing system provided by the utility model, the measurement module comprises a plurality of measurement structures, the state of the VCM converter internal catalyst can be more comprehensively measured, and timing is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structure connection schematic view of the DCS-based VCM converter internal catalyst running time timing system provided by the utility model embodiment;

[0019] Figure 2 is a structure connection schematic view of the distributed control system provided by the utility model embodiment;

[0020] Figure 3 is a structure connection schematic view of the communication module provided by the utility model embodiment.

[0021] REFERENCE SIGNS:

[0022] 1, operation terminal; 2, distributed control system; 3, communication module; 4, first thermocouple; 5, second thermocouple; 6, third thermocouple; 7, porcelain ring; 8, cover; 9, catalyst; 201, start button; 202, stop button; 203, clear button; 204, timing operation block; 205, database; 206, I / O module; 301, multifunctional transmitter; 302, serial port server. DETAILED DESCRIPTION

[0023] In view of the deficiencies in the prior art, the present inventors have long studied and practiced to propose the technical solution of the present utility model. The technical solution, its implementation process and principles will be further explained as follows.

[0024] Please refer to Figure 1 , a timing system for internal catalyst operation time of VCM converter based on DCS. The timing system comprises a control terminal 1, a distributed control system 2, a communication module 3 and a measurement module.

[0025] The VCM converter has a cover 8 on the top and a porcelain ring 7 at the bottom, and the inside is filled with catalyst 9.

[0026] The measurement module is arranged on the cover 8 of the VCM converter, specifically comprising four groups of measurement structures, respectively located at the four corner positions of the cover 8 of the VCM converter and extending to the internal space of the VCM converter to ensure that the catalyst 9 can be contacted. Each group of measurement structures comprises a first thermocouple 4, a second thermocouple 5 and a third thermocouple 6, which are key components for monitoring temperature. When the VCM converter starts and enters the normal working state, the first thermocouple 4, the second thermocouple 5 and the third thermocouple 6 start to monitor the change of the working environment of the catalyst 9 in real time.

[0027] Specifically, the reference end of the first thermocouple 4 is arranged on the cover 8 of the VCM converter, which usually contacts room temperature and is used for measuring ambient temperature, while the measurement end extends to the upper part of the internal space of the VCM converter and is used for measuring the temperature of the upper catalyst 9. Due to the temperature difference between the reference end and the measurement end, an electromotive force (voltage) will be generated, and a direct current voltage signal will be output by the first thermocouple 4. The reference end of the second thermocouple 5 is also arranged on the cover 8 of the VCM converter, which contacts room temperature and is used for measuring ambient temperature, while the measurement end extends to the middle part of the internal space of the VCM converter and is used for measuring the temperature of the middle catalyst 9 and outputting a corresponding direct current voltage signal. The reference end of the third thermocouple 6 is also arranged on the cover 8 of the VCM converter, which contacts room temperature and is used for measuring ambient temperature, while the measurement end extends to the bottom of the internal space of the VCM converter and is used for measuring the temperature of the bottom catalyst 9 and outputting a corresponding direct current voltage signal. The three thermocouples located at the upper, middle and bottom parts respectively can realize more comprehensive temperature monitoring of the internal catalyst of the entire VCM converter.

[0028] Please refer to Figure 2 , the communication module 3 is composed of a serial server 302 and a plurality of multifunctional transmitters 301. On each VCM converter, twelve thermocouples are arranged, and the twelve thermocouples form a group and are connected with one multifunctional transmitter 301. Each thermocouple in the twelve thermocouples is connected with the multifunctional transmitter 301 through a specific address.

[0029] The multi-function transmitter 301 includes an acquisition module and a conversion module. The acquisition module is responsible for acquiring the DC voltage signal from the thermocouple, while the conversion module is used to convert the DC voltage signal into a 4-20mA current signal. The serial server 302 receives the 4-20mA current signal and transmits these current signals to the distributed control system 2 via an RS-485 interface.

[0030] This saves on cables. Taking 128 units as an example, if using the traditional method, each thermocouple would need to be connected to the distributed control system 2 via hardwiring, requiring a total of 1536 cables, each approximately 500 meters long. However, with the improved solution, we only need 64 cables, each approximately 500 meters long, and 1536 cables, each only 5 meters long. This not only reduces material costs but also simplifies installation and maintenance.

[0031] In existing systems, each AI card typically has 16 channels. Therefore, for 128 units, 96 AI cards and 1536 temperature-sensitive safety barriers are required. By reducing the use of cables, a significant number of AI cards and temperature-sensitive safety barriers can be saved, reducing hardware costs and simplifying system configuration.

[0032] In addition, the multi-functional transmitter also has a local display function, which allows operators to view data directly on site without relying on the display of the distributed control system 2, greatly improving the convenience of detection and enabling on-site staff to respond to various situations more quickly, ensuring the efficient operation of the system.

[0033] The distributed control system 2 consists of an I / O module 206, a database 205, and a timing calculation block 204. The I / O module 206 includes sixteen signal interfaces, each connected to a corresponding multi-function transmitter 301 via an address. The I / O module 206 converts operating status information into standard signals, such as 0-10V and digital 0 / 1, to ensure accurate processing. The database 205, connected to the I / O module 206, stores these standard signals. The timing calculation block 204, connected to the database 205, retrieves the standard signals from the database and determines the operating time of the catalyst 9 based on these standard signals.

[0034] Please refer to Figure 3 The timing calculation block 204 includes a start timing module, a pause timing module, and a reset time module. The control terminal 1 is equipped with a start button 201, a stop button 202, and a reset button 203.

[0035] The start button 201 is connected with the start timing module, and is used for sending a start timing instruction. The start timing module responds to the start timing instruction, and performs a start timing operation. The start timing module determines whether the catalyst 9 is in an effective running state according to a preset logic. If the catalyst 9 is determined to be in the effective running state, the start timing is started. If the catalyst 9 is determined not to be in the effective running state, the timing is paused. The running time data is displayed and saved through the operation terminal 1, and can be uploaded to other devices. The stop button 202 is connected with the pause timing module, and is used for sending a stop timing instruction. The pause timing module responds to the stop timing instruction, and performs a stop timing operation. The clear button 203 is connected with the reset time module, and is used for sending a reset time instruction. The reset time module responds to the reset time instruction, and performs a clear operation.

[0036] In summary, the VCM converter internal catalyst running time timing system based on the DCS system has high-precision data acquisition and processing capability of the integrated DCS, and realizes automatic monitoring and accurate recording of the catalyst running time. The application of the system will significantly improve the intelligent level and management efficiency of chemical production, and also provides strong support for scientific replacement and life extension of the catalyst, and has important significance for improving the economic benefit and social benefit of the VCM production enterprise.

[0037] It should be understood that the above embodiments are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. A DCS based VCM converter internal catalyst run time clocking system, characterized by, The application relates to a VCM converter monitoring system, which comprises a measurement module, a communication module, a distributed control system and a control terminal. The measurement module is arranged in a VCM converter and used for monitoring the running state information of a catalyst in the VCM converter. The communication module is connected with the measurement module and the distributed control system respectively and used for transmitting the running state information collected by the measurement module to the distributed control system.

2. The DCS-based VCM converter internal catalyst run time clocking system of claim 1, wherein, The distributed control system is used for storing and determining the running time of the catalyst based on the running state information.

3. The DCS-based VCM converter internal catalyst run time clocking system of claim 2, wherein, The control terminal is connected with the distributed control system and used for controlling the timing operation of the distributed control system.

4. The DCS-based VCM converter internal catalyst run time clocking system of claim 3, wherein, The measurement module comprises multiple groups of measurement structures.

5. The DCS-based VCM converter internal catalyst run time clocking system of claim 3, wherein, The measurement structures are arranged on a cover of the VCM converter and extend into the internal space of the VCM converter.

6. The DCS-based VCM converter internal catalyst run time clocking system of claim 2, wherein, The measurement structures comprise a first measurer, a second measurer and a third measurer.

7. The DCS-based VCM converter internal catalyst run time clocking system of claim 1 or 2, wherein, One end of the first measurer is arranged on the cover of the VCM converter, the other end extends into the internal space of the VCM converter and keeps a first interval d1 with the cover. One end of the second measurer is arranged on the cover of the VCM converter, the other end extends into the internal space of the VCM converter and keeps a second interval d2 with the cover.

8. The DCS-based VCM converter internal catalyst run time clocking system of claim 7, wherein, One end of the third measurer is arranged on the cover of the VCM converter, the other end extends into the internal space of the VCM converter and keeps a third interval d3 with the cover. 0 < d1 < h / 2, d2 = h / 2, h / 2 < d3 < h, h is the internal depth of the VCM converter. The measurers are thermocouples which comprise measurement ends and reference ends. The reference ends are arranged on the cover of the VCM converter and the measurement ends are arranged in the internal space of the VCM converter and contact the catalyst. The measurement module comprises four groups of measurement structures which are arranged at four corner positions of the cover of the VCM converter. The communication module comprises a serial server and at least one multifunctional transmitter. The multifunctional transmitter is connected with the measurement module and the serial server respectively and the serial server is connected with the distributed control system. The multifunctional transmitter receives the running state information from the measurement module and converts the running state information into running signals. The serial server receives the running signals and transmits the running signals to the distributed control system. And / or, each four groups of measurement structures are connected with one multifunctional transmitter through addresses. The serial server is connected with the distributed control system through an RS-485 interface. And / or, the multifunctional transmitter comprises an acquisition module and a conversion module. The acquisition module is connected with the measurement module and the conversion module respectively. The acquisition module is used for acquiring the running state information from the measurement module and the conversion module is used for converting the running state information into running signals.

9. The DCS-based VCM converter internal catalyst run time clocking system of claim 1, wherein, The distributed control system comprises an I / O module, a storage module and a timing operation block; the I / O module is connected with the communication module and is used for converting the running state information into standard signals; the storage module is connected with the I / O module and is used for storing the standard signals; the timing operation block is connected with the storage module and is used for calling the standard signals in the storage module and determining the running time of the catalyst based on the standard signals.

10. The DCS-based VCM converter internal catalyst run time clocking system of claim 9, wherein, The timing operation block comprises a start timing module, a pause timing module and a reset time module; the control terminal is provided with at least a start button, a stop button and a clear button; the start button is configured to be connected with the start timing module and is used for sending a start timing instruction; the stop button is configured to be connected with the pause timing module and is used for sending a stop timing instruction; and the clear button is configured to be connected with the reset time module and is used for sending a reset time instruction.

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