CN204595557U - Based on the PTA chemical industry tail gas drying control system of PLC - Google Patents
Based on the PTA chemical industry tail gas drying control system of PLC Download PDFInfo
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- CN204595557U CN204595557U CN201520313154.6U CN201520313154U CN204595557U CN 204595557 U CN204595557 U CN 204595557U CN 201520313154 U CN201520313154 U CN 201520313154U CN 204595557 U CN204595557 U CN 204595557U
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- Drying Of Gases (AREA)
Abstract
A kind of PTA chemical industry tail gas drying control system based on PLC of the utility model patent, it is characterized in that comprising main control module, signal acquisition module, execution module, standby power supply module, these modules are used for the PTA chemical industry tail gas drying control system operating mode of auxiliary PLC, and main control module comprises PLC; Signal acquisition module comprises 2 gas pressure sensors; Execution module comprises drying tower and flowrate control valve; Standby power supply module is the integrated package synthesized with CPU and communication module, the utility model is when gas flow is fashionable, alternately opening and closing A tower, B tower and flowrate control valve is realized by PLC, two drying agent can be used simultaneously, one dry for gas, and another is then for the regeneration of drying agent, and this system also has adjustment pressure to adapt to regeneration and the using function of drying agent in addition, this system has the function of Automatic Control, allows tail gas drying become more efficient.
Description
Technical field
The utility model design chemical industry tail gas process field, specifically a kind of PTA chemical industry tail gas drying control system based on PLC.
Background technology
Tail gas exsiccator is the equipment of the humidified nitrogen in dry PTA chemical plant installations production run.Can by the nitrogen drying of humidity by this device, to reach application index.Nitrogen drying is clean, not moisture, not oil-containing.Nitrogen is inert gas, can not make to need the electrical equipment of source of the gas and pneumatic components and parts to produce oxidation and corrosion, both can stop bacterium and bacteriophage grows and pollutes in components and parts, also can extend electric elements and pneumatic components and parts serviceable life.The nitrogen produced in production can reclaim in industry, realizes recycling of waste gas.
Utility model content
The utility model object is to provide a kind of PTA chemical industry tail gas drying control system based on PLC, to realize the humidified nitrogen produced in efficient dry PTA Chemical Manufacture.The utility model provides the automation scheme that a kind of PLC controls for this reason.
For the utility model that achieves the above object solves the technical scheme that its technical matters adopts be: a kind of PTA chemical industry tail gas drying control system based on PLC, comprise main control module, signal acquisition module, execution module, power module, these modules are used for the PTA chemical industry tail gas drying control system operating mode of auxiliary PLC, and main control module comprises PLC; Signal acquisition module comprises 2 pressure transducers; Execution module comprises drying tower and flowrate control valve; Standby power supply module is the integrated package synthesized with CPU and communication module.
Described PLC module has the features such as programming is simple, reliability is high, anti-electromagnetic interference capability is strong, environmental suitability is strong.Be responsible for the signal that reading/processes sensor is given, control drying agent and flowrate control valve.
Described gas pressure sensor module produces voltage/current by the change sensor of gaseous tension again this voltage/current value to be fed back to PLC.
Described standby power supply module is the integrated package be synthesized together with CPU and communication module, can ensure that the program of PLC hardware is not lost when system power failure.
The utility model effectively processes for the moist nitrogen produced in PTA Chemical Manufacture.Why because nitrogen drying is clean to moist nitrogen process, not moisture, not oil-containing.Nitrogen is inert gas, can not make to need the electrical equipment of source of the gas and pneumatic components and parts to produce oxidation and corrosion, both can stop bacterium and bacteriophage grows and pollutes in components and parts, also can extend electric elements and pneumatic components and parts serviceable life.The nitrogen produced in production can reclaim in industry, realizes recycling of waste gas.
The utility model advantage be following some: one, the design produces moist nitrogen and design have the high advantage of automaticity for PTA Chemical Manufacture.Two, the design can make wet solvent or water cut reduce to 0.1% (wet basis) from 15%, and the solvent gas that drying evaporates or water vapor take dryer out of by circulating carried (nitrogen).
Accompanying drawing explanation
Accompanying drawing 1 is the utility model structured flowchart
Accompanying drawing 2 is the utility model outside drawings
Embodiment
Once the specific structural features of a kind of PTA chemical industry tail gas drying control system based on PLC of composition graphs accompanying drawing 1 pair of the utility model and implementation and the effect that reaches are described further.
Structured flowchart is a kind of PTA chemical industry tail gas drying control system based on PLC as shown in Figure 1, comprise: main control module, signal acquisition module, execution module, power module, these modules are used for the PTA chemical industry tail gas drying control system operating mode of auxiliary PLC, and main control module comprises PLC; Signal acquisition module comprises 2 pressure transducers; Execution module comprises drying tower and flowrate control valve; Standby power supply module is the integrated package synthesized with CPU and communication module.Can by the nitrogen drying of humidity by this device, to reach application index.Nitrogen drying is clean, not moisture, not oil-containing.Nitrogen is inert gas, can not make to need the electrical equipment of source of the gas and pneumatic components and parts to produce oxidation and corrosion, both can stop bacterium and bacteriophage grows and pollutes in components and parts, also can extend electric elements and pneumatic components and parts serviceable life.The nitrogen produced in production can reclaim in industry, realizes recycling of waste gas.Drying tower A and drying tower B is divided in accompanying drawing 2, be connected by some flowrate control valves between drying tower A and drying tower B, during normal work, two exsiccators work simultaneously, one dry for gas, another is for the regeneration of drying agent, its concrete implementation procedure is as follows: the 1st step: A tower is dry, B tower off-line.XCV3355 and XCV3364 is in open mode, and all the other valves cut out.The action situation of relative previous step valve is: XCV3360, XCV3369 and XCV3365 close.2nd step: A tower is dry, the step-down of B tower.The action situation of valve is: XCV3359 opens.3rd step: A tower is dry, B tower regenerates.The action situation of valve is: XCV3368 and XCV3367 opens.4th step: A tower is dry, B tower boosts.The action situation of valve is: XCV3390 opens, XCV3359 and XCV3367 closes.5th step: B tower is reached the standard grade.The action situation of valve is: XCV3360 and XCV3369 opens, and XCV3390 closes.6th step: B tower is dry, A tower off-line.The action situation of valve is: XCV3355, XCV3364 and XCV3368 close.7th step: B tower is dry, the step-down of A tower.The action situation of valve is: XCV3356 opens.8th step: B tower is dry, A tower regenerates.The action situation of valve is: XCV3365 and XCV3367 opens.9th step: B tower is dry, A tower boosts.The action situation of valve is: XCV3390 opens, and XCV3356, XCV3367 close.10th step: A tower is reached the standard grade.The action situation of valve is: XCV3355 and XCV3364 opens, and XCV3390 closes.Automatically can jump to the first step after system executes the 10th step, thus make system complete sequence logical control works fine to valve.
Claims (1)
1. based on the PTA chemical industry tail gas drying control system of PLC, it is characterized in that: comprise main control module, signal acquisition module, execution module, power module, main control module comprises PLC, signal acquisition module comprises 2 gas pressure sensors, execution module comprises drying tower and flowrate control valve, pressure transducer detects drying tower internal gas pressure, by signal feedback to PLC, controls the drying tower in execution module and flowrate control valve; Standby power supply module is the integrated package synthesized with CPU and communication module, can ensure that the program of PLC hardware is not lost when system power failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520313154.6U CN204595557U (en) | 2015-05-14 | 2015-05-14 | Based on the PTA chemical industry tail gas drying control system of PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520313154.6U CN204595557U (en) | 2015-05-14 | 2015-05-14 | Based on the PTA chemical industry tail gas drying control system of PLC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204595557U true CN204595557U (en) | 2015-08-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520313154.6U Expired - Fee Related CN204595557U (en) | 2015-05-14 | 2015-05-14 | Based on the PTA chemical industry tail gas drying control system of PLC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204595557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389544A (en) * | 2018-04-20 | 2019-10-29 | 中国石油天然气股份有限公司 | Method for handover control and device, the storage medium and processor of drier |
-
2015
- 2015-05-14 CN CN201520313154.6U patent/CN204595557U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389544A (en) * | 2018-04-20 | 2019-10-29 | 中国石油天然气股份有限公司 | Method for handover control and device, the storage medium and processor of drier |
| CN110389544B (en) * | 2018-04-20 | 2021-07-02 | 中国石油天然气股份有限公司 | Dryer switching control method and device, storage medium and processor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160514 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |