CN102620145A - Automatic low-pressure protection system for coke oven gas pipeline - Google Patents
Automatic low-pressure protection system for coke oven gas pipeline Download PDFInfo
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- CN102620145A CN102620145A CN2012101278941A CN201210127894A CN102620145A CN 102620145 A CN102620145 A CN 102620145A CN 2012101278941 A CN2012101278941 A CN 2012101278941A CN 201210127894 A CN201210127894 A CN 201210127894A CN 102620145 A CN102620145 A CN 102620145A
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Abstract
The invention discloses an automatic low-pressure protection system for a coke oven gas pipeline and belongs to the technical field of coke oven gas supply in the metallurgy industry. The automatic low-pressure protection system comprises three groups of pressure detection switches arranged on a gas transporting pipeline, wherein each group of pressure detection switches comprises a low-pressure detection switch and a high-pressure detection switch; a nitrogen gas transporting pipeline is connected onto the gas transporting pipeline positioned at a coke oven gas outlet of a coke oven; an electropneumatic valve is arranged on the nitrogen gas transporting pipeline and is connected with the output end of a field PLC (Programmable Logic Controller); and the pressure detection switches are connected with the input end of the field PLC. The automatic low-pressure protection system disclosed by the invention has the benefits that the pressure detection switches are arranged on the gas transporting pipeline so as to realize real-time monitoring of a pressure signal; and the electropneumatic valve is opened and closed and the nitrogen gas transporting pipeline is communicated and closed by the field PLC, and therefore, the pressure value in the nitrogen gas transporting pipeline is enabled to be positioned within safety range and gas back flow accidents are effectively avoided.
Description
Technical field
The present invention relates to a kind of coke oven gas pipe low pressure automatic protective system, belong to metallurgy industry coke-stove gas provisioning technique field.
Background technique
Coke-stove gas is claimed oven gas again, is to be mixed with coal for coking with several kinds of bituminous coal, and through behind the high temperature carbonization, a kind of inflammable gas that in output coke and tar product, is produced is the by-product of coking industry in coke oven.The coke-stove gas of coke oven output is supplied with each user after pipeline is incorporated into the power networks.If coke oven blower fan catastrophic failure is shut down, coke oven gas pipe pressure disappears, and pipe backfire maybe be accidents caused, has a strong impact on each user's normal use, causes immeasurable loss.
Summary of the invention
The technical problem that the present invention will solve provides a kind of coke oven gas pipe low pressure automatic protective system, can effectively avoid the generation of gas pipeline tempering accident, guarantees safety in production.
For solving the problems of the technologies described above; The technological scheme that the present invention taked is: a kind of coke oven gas pipe low pressure automatic protective system; Comprise the pressure detection switch that is arranged on the gas pipeline, said every group of pressure detection switch comprises a low pressure detecting switch and a high pressure detecting switch; On the gas pipeline in the coke-stove gas outlet port that is positioned at coke oven, be connected with nitrogen gas delivery-line, on said nitrogen gas delivery-line, be provided with an electropneumatic valve; Said electropneumatic valve is connected with the output terminal of on-the-spot PLC controller, and said pressure detection switch is connected with the input end of on-the-spot PLC controller.
The quantity of said pressure detection switch is more than three groups.
On gas pipeline, also be provided with pressure transmitter, said pressure transmitter is connected with the input end of on-the-spot PLC controller.
On said nitrogen gas delivery-line, also be provided with two hand switch valves; Said on-the-spot PLC controller is connected with the remote PLC control device through Ethernet.Said each hand switch valve is as the usefulness of maintenance or the manual intervention during system exception.
The model of said low pressure detecting switch and high pressure detecting switch is H100-524; The model of said pressure transmitter is SSK210-GA1MA3N2N3; The model of said electropneumatic valve is DJ-520; The model of said hand switch valve is J41TDN80, and the model of said on-the-spot PLC controller is S7-300, and the model of said remote PLC control device is S7-200.
System work process is following: the pressure detection switch that is installed on the gas pipeline is used for detecting the force value on the gas pipeline; When force value is lower than 2KPa, the conducting of low pressure detecting switch, and send the low pressure signal to on-the-spot PLC controller; On-the-spot PLC controller control ecp opening of valves; Gas conveying tube road supplying nitrogen is given in the nitrogen gas delivery-line conducting, guarantees that the force value in the gas pipeline is in the safety range; When pressure detection switch detects force value on the gas pipeline and is higher than 11KPa; The conducting of high pressure detecting switch; And send the high-pressure signal to on-the-spot PLC controller, and on-the-spot PLC controller control electropneumatic valve is closed, and nitrogen gas delivery-line stops to gas conveying tube road supplying nitrogen.Thereby guarantee the safety of coke-stove gas conveyance conduit.
Pressure transmitter is used for the analogue signal of the force value in the gas pipeline is passed to on-the-spot PLC controller in real time, thereby reaches the purpose of real-time monitoring pressure detecting switch action accuracy.
In addition; Because on-the-spot PLC controller is unattended, therefore, it is connected with the remote PLC control device; Monitor the various state signals of on-the-spot PLC controller in real time by the remote PLC control device; In case note abnormalities, will in time point out the related personnel that trouble location is checked, the stability and the reliability of the operation of assurance system.Under abnormal conditions such as scene outage, the remote PLC control device by the conducting of the realization of the hand switch valve on staff's remote operation nitrogen gas delivery-line of remote control room pipeline, avoids accident to take place output alarm signal.
Beneficial effect of the present invention is following:
(1) through being set, pressure detection switch realizes the real-time monitoring of pressure signal on gas pipeline; Realize open and close through on-the-spot PLC controller to electropneumatic valve; The conducting that realizes nitrogen gas delivery-line with close; Thereby the force value in the assurance gas pipeline is in the safety range, effectively avoids coal gas to pour in down a chimney the generation of accident.
(2) through on-the-spot PLC controller is connected with the remote PLC control device, realize the real-time monitoring of remote control room to the scene, occur solving a problem promptly when unusual, guarantee safety in production.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is a system of the present invention connection diagram;
Wherein, 1, coke oven, 2, gas pipeline, 3, the low pressure detecting switch, 4, the high pressure detecting switch, 5, pressure transmitter, 6, nitrogen gas delivery-line, 7, electropneumatic valve, 8, the hand switch valve, 9, on-the-spot PLC controller, 10, remote PLC control device.
Embodiment
Embodiment as shown in Figure 1 can know; Coke oven gas pipe low pressure automatic protective system of the present invention; Comprise three groups of pressure detection switch and a pressure transmitter 5 of being arranged on the gas pipeline 2, said every group of pressure detection switch comprises a low pressure detecting switch 3 and a high pressure detecting switch 4; On the gas pipeline 2 in the coke-stove gas outlet port that is positioned at coke oven 1, be connected with nitrogen gas delivery-line 6, on said nitrogen gas delivery-line 6, be provided with an electropneumatic valve 7; Said electropneumatic valve 7 is connected with the output terminal of on-the-spot PLC controller 9, and said pressure detection switch is connected with the input end of on-the-spot PLC controller 9 respectively with pressure transmitter 5.
On said nitrogen gas delivery-line 6, also be provided with two hand switch valves 8; Said on-the-spot PLC controller 9 is connected with remote PLC control device 10 through Ethernet.
The model of said low pressure detecting switch 3 and high pressure detecting switch 4 is H100-524; The model of said pressure transmitter 5 is SSK210-GA1MA3N2N3; The model of said electropneumatic valve 7 is DJ-520; The model of said hand switch valve 8 is J41TDN80, and the model of said on-the-spot PLC controller 9 is S7-300, and the model of said remote PLC control device 10 is S7-200.
The pressure detection switch that is installed on the gas pipeline is used for detecting the force value on the gas pipeline 2; When force value is lower than 2KPa, 3 conductings of low pressure detecting switch, and send the low pressure signal to on-the-spot PLC controller 9; On-the-spot PLC controller 9 control electropneumatic valves 7 are opened; Gas conveying tube road 2 supplying nitrogens are given in nitrogen gas delivery-line 6 conductings, guarantee that the force value in the gas pipeline 2 is in the safety range; When pressure detection switch detects force value on the gas pipeline 2 and is higher than 11KPa; 4 conductings of high pressure detecting switch; And send the high-pressure signal to on-the-spot PLC controller 9; On-the-spot PLC controller 9 control electropneumatic valves 7 are closed, and nitrogen gas delivery-line 6 stops to gas conveying tube road 2 supplying nitrogens.Thereby guarantee the safety of coke-stove gas conveyance conduit 2.
When field control system occurs when unusual; Under abnormal conditions such as scene outage; The remote PLC control device by the conducting of the realization of the hand switch valve on staff's remote operation nitrogen gas delivery-line of remote control room pipeline, avoids accident to take place output alarm signal.
Claims (5)
1. a coke oven gas pipe low pressure automatic protective system is characterized in that, comprises the pressure detection switch that is arranged on the gas pipeline (2), and said pressure detection switch comprises a low pressure detecting switch (3) and a high pressure detecting switch (4); On the gas pipeline (2) in the coke-stove gas outlet port that is positioned at coke oven (1), be connected with nitrogen gas delivery-line (6), on said nitrogen gas delivery-line (6), be provided with an electropneumatic valve (7); Said electropneumatic valve (7) is connected with the output terminal of on-the-spot PLC controller (9), and said pressure detection switch is connected with the input end of on-the-spot PLC controller (9).
2. coke oven gas pipe low pressure automatic protective system according to claim 1 is characterized in that the quantity of said pressure detection switch is more than three groups.
3. coke oven gas pipe low pressure automatic protective system according to claim 1 is characterized in that, on gas pipeline (2), also is provided with pressure transmitter (5), and said pressure transmitter (5) is connected with the input end of on-the-spot PLC controller (9).
4. coke oven gas pipe low pressure automatic protective system according to claim 1 is characterized in that, on said nitrogen gas delivery-line (6), also is provided with two hand switch valves (8); Said on-the-spot PLC controller (9) is connected with remote PLC control device (10) through Ethernet.
5. according to claim 3 or 4 described coke oven gas pipe low pressure automatic protective systems; It is characterized in that; The model of said low pressure detecting switch (3) and high pressure detecting switch (4) is H100-524; The model of said pressure transmitter (5) is SSK210-GA1MA3N2N3, and the model of said electropneumatic valve (7) is DJ-520, and the model of said hand switch valve (8) is J41TDN80; The model of said on-the-spot PLC controller (9) is S7-300, and the model of said remote PLC control device (10) is S7-200.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101278941A CN102620145A (en) | 2012-04-27 | 2012-04-27 | Automatic low-pressure protection system for coke oven gas pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101278941A CN102620145A (en) | 2012-04-27 | 2012-04-27 | Automatic low-pressure protection system for coke oven gas pipeline |
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| CN102620145A true CN102620145A (en) | 2012-08-01 |
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| CN2012101278941A Pending CN102620145A (en) | 2012-04-27 | 2012-04-27 | Automatic low-pressure protection system for coke oven gas pipeline |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614502A (en) * | 2013-10-26 | 2014-03-05 | 芜湖新兴铸管有限责任公司 | Gas-holder-free single blast furnace produced gas pipe network |
| CN106481982A (en) * | 2016-09-29 | 2017-03-08 | 马鞍山钢铁股份有限公司 | A kind of automatic nitrogen safety purge gaspipe line device |
| CN106949379A (en) * | 2017-04-21 | 2017-07-14 | 山东钢铁集团日照有限公司 | A kind of coal-gas recovering conveyance conduit safety control and method |
| CN108785946A (en) * | 2017-04-27 | 2018-11-13 | 南京消防器材股份有限公司 | A kind of gas extinguishing system control method |
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| CN101956900A (en) * | 2010-08-31 | 2011-01-26 | 北京航天万源煤化工工程技术有限公司 | Equipment and method for monitoring pipeline safety |
| CN201778043U (en) * | 2010-08-27 | 2011-03-30 | 济钢集团国际工程技术有限公司 | Coal gas blowing device of blast furnace |
| CN202583849U (en) * | 2012-04-27 | 2012-12-05 | 新兴铸管股份有限公司 | Coke oven gas pipeline low-pressure automatic protection system |
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2012
- 2012-04-27 CN CN2012101278941A patent/CN102620145A/en active Pending
Patent Citations (3)
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| CN201778043U (en) * | 2010-08-27 | 2011-03-30 | 济钢集团国际工程技术有限公司 | Coal gas blowing device of blast furnace |
| CN101956900A (en) * | 2010-08-31 | 2011-01-26 | 北京航天万源煤化工工程技术有限公司 | Equipment and method for monitoring pipeline safety |
| CN202583849U (en) * | 2012-04-27 | 2012-12-05 | 新兴铸管股份有限公司 | Coke oven gas pipeline low-pressure automatic protection system |
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| 李会容等: "基于PLC的煤气低压保护系统的研究", 《西昌学院学报(自然科学版)》, no. 01, 31 March 2006 (2006-03-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614502A (en) * | 2013-10-26 | 2014-03-05 | 芜湖新兴铸管有限责任公司 | Gas-holder-free single blast furnace produced gas pipe network |
| CN106481982A (en) * | 2016-09-29 | 2017-03-08 | 马鞍山钢铁股份有限公司 | A kind of automatic nitrogen safety purge gaspipe line device |
| CN106949379A (en) * | 2017-04-21 | 2017-07-14 | 山东钢铁集团日照有限公司 | A kind of coal-gas recovering conveyance conduit safety control and method |
| CN108785946A (en) * | 2017-04-27 | 2018-11-13 | 南京消防器材股份有限公司 | A kind of gas extinguishing system control method |
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Application publication date: 20120801 |