CN101463810B - Syngas compressor security automatic control device - Google Patents
Syngas compressor security automatic control device Download PDFInfo
- Publication number
- CN101463810B CN101463810B CN200910110959XA CN200910110959A CN101463810B CN 101463810 B CN101463810 B CN 101463810B CN 200910110959X A CN200910110959X A CN 200910110959XA CN 200910110959 A CN200910110959 A CN 200910110959A CN 101463810 B CN101463810 B CN 101463810B
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- Prior art keywords
- compressor
- pressure
- oil
- electric contact
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000003786 synthesis reaction Methods 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 10
- 229910021529 ammonia Inorganic materials 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 238000004886 process control Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 20
- 238000005516 engineering process Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 239000000470 constituent Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
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Abstract
合成气压缩机安保自控装置，涉及化工用压缩机控制装置，其特征在于进气口、进水口、进油口各安装有三块电接点气压表、三块电接点水压表、三块电接点油压表，每块电接点仪表分别与PLC中央处理器输入端连接；PLC中央处理器输出端与压缩机控制开关电路连接。优点在于该系统采用模块化结构，体积小，取代了盘集装式仪表和分立式继电器控制装置，全面实现了合成气压缩机所有工艺控制点的自动控制，具有可靠性高、精度高，操作简单方便、经济实用，还具有扩展性，完全满足了合成氨生产控制要求。
The security automatic control device of a synthetic gas compressor relates to a control device for a chemical compressor, and is characterized in that three electric contact pressure gauges, three electric contact water pressure gauges, three electric contact point Oil pressure gauges, each electric contact instrument is connected to the input end of the PLC central processing unit; the output end of the PLC central processing unit is connected to the compressor control switch circuit. The advantage is that the system adopts a modular structure and is small in size. It replaces the panel-mounted instrument and discrete relay control device, and fully realizes the automatic control of all process control points of the syngas compressor. It has high reliability and high precision. The operation is simple and convenient, economical and practical, and has scalability, which fully meets the control requirements of synthetic ammonia production.
Description
Technical field:
The present invention relates to chemical industry compressor control device, be specially adapted to synthesic gas compressor security system automatic controller.
Background technique:
The task of synthetic ammonia synthesic gas compressor is the gas from desulfurization, conversion, decarburization, refining procedure to be pressurizeed respectively reach required relevant pressure, is transported to each relevant operation and uses.For the safety that guarantees that ammonia synthesis process is produced, must normal running and each section of constant compression machine pressure and temperature, prevent to take out negative pressure and insufficient water accident, and must stablize level height and oil pump and export oil pressure and guarantee that synthesic gas compressor well moves.When one section inlet pressure formation of synthesic gas compressor negative pressure, airborne oxygen is sneaked into one section inlet, mixes with coal gas system to form inflammable gas, the accident of blasting after the compressed machine compression; When the pressure of supply water decompression, gas is compressed and produces a large amount of heat cylinder temperature is raise, and the lubricant oil carbonization that can be decomposed loses lubrication, and piston, cylinder are damaged, and compressor packing damages, and compressor can not safe operation.When circulation charge oil pressure decompression, the oil film of lubricant oil loses seal action, produces gas leakage, increases the thermomechanical components friction simultaneously, the parts heating,, damage piston, cylinder, filler, compressor can not safe operation.Because former synthesic gas compressor robot control system(RCS) adopts bulky unit instrument unit loading type control; the rate of fault height, reliability is low, control accuracy is low, maintenance is big; particularly the low interlocking of reporting to the police of one section inlet pressure of synthesic gas compressor, the total pipe pressure of cooling water hang down the interlocking of reporting to the police; the low interlocking of reporting to the police of charge oil pressure adopts separated relay single-point protection control logic, easily causes the production accident of malfunction or tripping.Propose the synthesic gas compressor safety protection device is improved based on above-mentioned defective, project can improve reliability, control accuracy, the minimizing maintenance of control system in the less situation of investment, to adapt to the ammonia synthesis process production safety operation of the new period.
Summary of the invention:
The objective of the invention is to overcome above-mentioned defective, a kind of security self-control apparatus for synthesis gas compressor is provided.
The solution of the present invention is: comprise that the synthesic gas compressor suction port is communicated with the synthetic gas pipeline, the compressor constituent is communicated with the cooling water house steward, the compressor oil-supplying system is communicated with oil supply pipeline, and be separately installed with barometer, water pressure gage, oil pressure gauge at compressor synthetic gas suction port, constituent water intake, oil supply system filler opening, it is characterized in that suction port, water intake, filler opening respectively are equipped with three electric contact barometers, three electric contact water pressure gages, three electric contact oil pressure gauges, every electric contact instrument is connected with PLC central processing unit (CPU) input end respectively; PLC central processing unit (CPU) output terminal is connected with the compressor control switching circuit.
The invention has the advantages that: this system adopts modular construction, volume is little, dish unit loading type instrument and separated relay control device have been replaced, round Realization the automatic control of all technology controlling and process points of synthesic gas compressor, have reliability height, precision height, simple to operation, economical and practical, also have expansivity, satisfied Ammonia Production control requirement fully.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a compressor interlocking signal schematic representation of the present invention.
Embodiment:
Structure of the present invention is to comprise that the synthesic gas compressor suction port is communicated with the synthetic gas pipeline, the compressor constituent is communicated with the cooling water house steward, the compressor oil-supplying system is communicated with oil supply pipeline, and be separately installed with barometer, water pressure gage, oil pressure gauge at compressor synthetic gas suction port, constituent water intake, oil supply system filler opening, it is characterized in that suction port, water intake, filler opening respectively are equipped with three electric contact barometers, three electric contact water pressure gages, three electric contact oil pressure gauges, every electric contact instrument is connected with PLC central processing unit (CPU) input end respectively; PLC central processing unit (CPU) output terminal is connected with the compressor control switching circuit.
The PLC central processing unit (CPU) also comprises:
Air pressure contact signal comparator; This comparator comprises:
Be used to receive the reception unit of three air pressure contact signals,
Be used for when two contact signal inputs, " three get two " voting procedure logic operation result being transferred to the voting process device of command device,
Be used to receive voting process device operation result and carry out the air pressure command device of rupturing operation for the compressor control switching circuit information transmission;
Hydraulic pressure contact signal comparator; This comparator comprises:
Be used to receive the reception unit of three hydraulic pressure contact signals,
Be used for when two contact signal inputs, " three get two " voting procedure logic operation result being transferred to the voting process device of command device,
Be used to receive voting process device operation result and carry out the hydraulic pressure command device of rupturing operation for the compressor control switching circuit information transmission;
Oil pressure contact signal comparator; This comparator comprises:
Be used to receive the reception unit of three oil pressure contact signals,
Be used for when two contact signal inputs, " three get two " voting procedure logic operation result being transferred to the voting process device of command device,
Be used to receive voting process device operation result and carry out the oil pressure command device of rupturing operation for the compressor control switching circuit information transmission;
Air pressure, hydraulic pressure, oil pressure three command devices are connected with the compressor control switching circuit respectively.
Electric contact barometer, electric contact water pressure gage, its internal structure of electric contact oil pressure gauge are made up of pressure transducer, pressure display unit, contact switch, and contact switch can send the contact electrical signal when force value arrives the lower limit of setting.
The control of synthesic gas compressor safety protection device of the present invention, be the structural design that adopts the next high performance control instrument+upper-position unit (touch screen), promptly pass through the TPC105-TD33 liquid crystal touch screen structure of the small PLC S7-313C+ embedded system of Siemens.
Respectively to one section inlet pipe of synthesic gas compressor, cooling water house steward, three technology controlling and process point pressures of charge oil pressure pipeline, promptly one section inlet pressure of synthesic gas compressor is installed three pressure gauge with electric contact PS1-a b c, three pressure gauge with electric contact PS2-a b c of the total pipe pressure installation of cooling water, three pressure gauge with electric contact PS3-a b c of charge oil pressure installation, the teletransmission of electric contact signal difference is to PLC controller S7-313C.See attached list 1.
Table 1 compressor interlocking content
The PLC processor comprises that also air pressure, hydraulic pressure, oil pressure command device are connected with three's warning circuit respectively.In case arbitrary group of data trigger alarm separately for low value among the three in " three get two " voting.
Control principle is: the next is core with PLC controller S7-313C, programming by software has realized " three get two " voting logic of one section inlet pressure of synthesic gas compressor, the total pipe pressure of cooling water, charge oil pressure warning interlock is controlled, improve the reliability of warning interlock action, get rid of malfunction or tripping accident, thereby realized the automatic control of synthesic gas compressor security.So-called " three get two " voting logic control is meant that each technology controlling and process point is installed three instrument to be detected, it is unusual to have at least two above instrument to detect this technology controlling and process point simultaneously in three instrument Check points, instrument sends a signal to PLC controller S7-313C simultaneously, carry out " three get two " voting logic after the PLC controller S7-313C received signal and judge the back output signal, one the road carries out acoustooptic alarm to alarm system, one the road carries out safety interlocking to electrical system controls, and the compressor automatic stopping maybe can not start.Simultaneously, PLC central processing unit (CPU) output terminal is connected with touch screen display.PLC controller S7-313C transfers to upper TPC105-TD33 touch screen with all detected parameters, and touch screen is realized functions such as parameter supervision, real-time tendency record, historical record, warning interlocking, running state demonstration.
Unusual when a technology controlling and process point wherein, promptly when one section inlet pressure of synthesic gas compressor was lower than 6kPa, 6kPa compared with pressure gauge with electric contact low value setting value; Or when the total pipe pressure of cooling water was lower than 150kPa, 150kPa compared with pressure gauge with electric contact low value setting value; Or when charge oil pressure is lower than 250kPa, 250kPa compares with pressure gauge with electric contact low value setting value, under technology controlling and process point three pressure gauge with electric contact electric contact PS-a b c closure simultaneously, or PS-a b, or PS-a c, or PS-b c have two pressure gauge with electric contact electric contacts closed simultaneously arbitrarily, electrical contacts closed signal is sent to the digital quantity input DI module of the input system of PLC controller S7-313C, after central processor unit PLCS7-313C receives this " low Value Data " contact close signal, carrying out the logical operation of " three get two " voting procedure handles, coil R1 or R2 or R3 also closure output signal to output system digital quantity output DO module, one the road carries out acoustooptic alarm to alarm system, one the road realizes interlocked control to electrical system in 50ms, the synthesic gas compressor automatic stopping maybe can not start, avoided synthesic gas compressor to take out negative pressure, hydraulic pressure is low, accidents such as low fuel pressure, thus realized the automatic control of compressor security.
PLC controller S7-313C is delivered to all detected parameters upper TPC105-TD33 touch screen simultaneously by the PC ABAP Adapter, touch screen is realized interactive human-computer dialogue operation simply, realizes functions such as parameter supervision, real-time tendency record, historical record, warning interlocking, running state demonstration.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910110959XA CN101463810B (en) | 2009-01-23 | 2009-01-23 | Syngas compressor security automatic control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910110959XA CN101463810B (en) | 2009-01-23 | 2009-01-23 | Syngas compressor security automatic control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101463810A CN101463810A (en) | 2009-06-24 |
| CN101463810B true CN101463810B (en) | 2010-07-28 |
Family
ID=40804541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910110959XA Expired - Fee Related CN101463810B (en) | 2009-01-23 | 2009-01-23 | Syngas compressor security automatic control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101463810B (en) |
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2009
- 2009-01-23 CN CN200910110959XA patent/CN101463810B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101463810A (en) | 2009-06-24 |
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