CN201582792U - Boiler steam pocket water level measurement and protection system - Google Patents
Boiler steam pocket water level measurement and protection system Download PDFInfo
- Publication number
- CN201582792U CN201582792U CN2009200945674U CN200920094567U CN201582792U CN 201582792 U CN201582792 U CN 201582792U CN 2009200945674 U CN2009200945674 U CN 2009200945674U CN 200920094567 U CN200920094567 U CN 200920094567U CN 201582792 U CN201582792 U CN 201582792U
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- plc control
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- control system
- pressure transmitter
- drum
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Abstract
The utility model discloses a boiler steam pocket water level measurement and protection system, which comprises two non-blind area double-colour water gauges, two self-compensating electric contact water gauges, three single-chamber balance containers, a temperature transmitter, a pressure transmitter, a differential pressure transmitter, a display, and a PLC control system. Each non-blind area double-colour water gauge is respectively communicated with steam and water in the steam pocket and can display the water level values; each self-compensating electric contact water gauge is connected with the steam pocket and can display the water level values, and a plurality of electric contacts are arranged in the self-compensating electric contact water gauge and has signal output to the PLC control system; and the single-chamber balance containers are respectively communicated with the steam pocket and the differential pressure transmitter through a positive pressure side connecting pipe, two ends of a negative pressure side connecting pipe are communicated with the differential pressure transmitter, the signals of the differential pressure transmitter are output to the PLC control system, the pressure transmitter and the temperature transmitter in the steam pocket output signals to the PLC control system, and the display is connected with the PLC control system. The water level measurement is accurate and stable.
Description
Technical field
The utility model relates to a kind of boiler drum water level measurement protection system.
Background technology
Guarantee that boiler drum level is an important safety index of boiler operatiopn in normal range (NR), according to thermal power plant safe operation and instructions for use, Steam Drum Water-level Protection is measured and the outfit of protection system becomes necessary condition; State electricity is sent out (2000) No. 589 files " preventing 25 important requirements of electrical production major accident " and state's electricity and is sent out the necessity that has also clearly proposed station boiler outfit drum level measurement and protection system in (2001) No. 795 files " State Power Corporation's station boiler steam bag level measuring system configuration install and use some regulations (try) " and the power industry 2004/10/20 " heat power plant boiler drum level measurement systems technology regulation ".
Also there are many incomplete places in present existing unit, and The Water Level Control of Steam is improper, causes the higher meeting of water level to make Boiler Steam seriously be with water, and vapor (steam) temperature descends, and jet chimney is impacted, and serious may damage steam turbine; Lack of water can not be kept the normal water circulation of boiler, make water-cooling wall overheated, may cause the badly damaged of boiler plant.So it is vital being equipped with rational level measuring and protection system.
Summary of the invention
The purpose of this utility model provides a kind of boiler drum water level measurement protection system; this system is by being equipped with equipment such as non-blind area two-colour fluviograph, self-compensation type electric contact point fluviograph, single-compartment balance container (configuration temperature and pressure compensation) and PLC control system; water level and the signal measured are compared, handle judgement; confirm the accurate numerical value of water level; guaranteed that drum respectively monitors water level meter operation accurately; stable, error is no more than ± 30mm mutually.
The utility model is to be made of two non-blind area two-colour fluviographs, two self-compensation type electric contact point fluviographs, three single-compartment balance containers, temperature transmitter, pressure transmitter, differential pressure transmitter, display and PLC control systems, every non-blind area two-colour fluviograph is communicated with vapour, the water of drum respectively, and it can show water level numerical value; Every self-compensation type electric contact point fluviograph is communicated with vapour, the water of drum by vapour side joint pipe and water side joint pipe, and it can show water level numerical value, is provided with a plurality of electric contacts in the self-compensation type electric contact point fluviograph, and the signal of these a plurality of electric contacts is exported to the PLC control system; Every single-compartment balance container is communicated with drum vapour, the other end is communicated with differential pressure transmitter by malleation side connecting pipe, the two ends of suction side connecting pipe are communicated with drum water and differential pressure transmitter respectively, the signal of differential pressure transmitter is exported to the PLC control system, be provided with pressure sensor in the vapour in the drum, the signal of pressure sensor is exported to the PLC control system by pressure transmitter, and the signal of temperature sensor is exported to the PLC control system by temperature transmitter, and display is connected with the PLC control system.
The utility model adopts the PLC control system as the control core; utilizing non-blind area two-colour fluviograph, self-compensation type electric contact point fluviograph and single-compartment balance container that drum is carried out water level measures; PLC is to the analog signal sampling of three single-compartment balance containers; contrast, correction are through compensation deals and calculating; determine the drum level measurement value; simultaneously to the input and the logic judgment processing of the electric contact alarm signal of two self-compensation type electric contact point fluviographs, finish that drum level measurement shows and the output of protection logical signal.
The beneficial effects of the utility model are: water level instrumentation amount is accurate, stable; PLC control system working stability, reliable adapts to the industry spot operating mode; The digitized processing of signal and control logic; The online fault-detecting ability that possesses device hardware; Operation interface is clear succinct, convenient; Water level and the signal measured are compared, handle judgement, confirm the accurate numerical value of water level, guaranteed that drum respectively monitors the operation of water level meter accurately, stable, error is no more than ± 30mm mutually.
Description of drawings
Fig. 1 is a configuration schematic diagram of the present utility model.
Fig. 2 is a non-blind area two-colour fluviograph scheme of installation of the present utility model.
Fig. 3 is a self-compensation type electric contact point fluviograph structural representation of the present utility model.
The specific embodiment
See also Fig. 1, Fig. 2 and shown in Figure 3, present embodiment is to be made of two non-blind area two-colour fluviographs 1, two self-compensation type electric contact point fluviographs 2, three single-compartment balance containers 3, temperature transmitter 4, pressure transmitter 5, differential pressure transmitter 6, display 7 and PLC control systems 8, every non-blind area two-colour fluviograph 1 is communicated with vapour, the water of drum 11 respectively, it can show water level numerical value, as shown in Figure 1; As shown in figures 1 and 3, every self-compensation type electric contact point fluviograph 2 is communicated with vapour, the water of drum by vapour side joint pipe 21 and water side joint pipe 22, it can show water level numerical value, be provided with a plurality of electric contacts in the self-compensation type electric contact point fluviograph 2, the signal of these a plurality of electric contacts is exported to PLC control system 8; As shown in Figure 2, every single-compartment balance container 3 is communicated with drum 11 vapour, the other end is communicated with differential pressure transmitter 6 by malleation side connecting pipe 9, the two ends of suction side connecting pipe 10 are communicated with drum 11 water and differential pressure transmitter 6 respectively, the signal of differential pressure transmitter 6 is exported to PLC control system 8, be provided with pressure sensor 12 in the vapour in the drum 11, be provided with temperature sensor 13 in the water in the drum 11, the signal of pressure sensor 12 is exported to PLC control system 8 by pressure transmitter 5, the signal of temperature sensor 13 is exported to PLC control system 8 by temperature transmitter 4, and display 7 is connected with PLC control system 8.In this embodiment, PLC is made by Siemens Company and produces.
Claims (1)
1. boiler drum water level measurement protection system, it is characterized in that: be to constitute by two non-blind area two-colour fluviographs, two self-compensation type electric contact point fluviographs, three single-compartment balance containers, temperature transmitter, pressure transmitter, differential pressure transmitter, display and PLC control systems, every non-blind area two-colour fluviograph is communicated with vapour, the water of drum respectively, and it can show water level numerical value; Every self-compensation type electric contact point fluviograph is communicated with vapour, the water of drum by vapour side joint pipe and water side joint pipe, and it can show water level numerical value, is provided with a plurality of electric contacts in the self-compensation type electric contact point fluviograph, and the signal of these a plurality of electric contacts is exported to the PLC control system; Every single-compartment balance container is communicated with drum vapour, the other end is communicated with differential pressure transmitter by malleation side connecting pipe, the two ends of suction side connecting pipe are communicated with drum water and differential pressure transmitter respectively, the signal of differential pressure transmitter is exported to the PLC control system, be provided with pressure sensor in the vapour in the drum, be provided with temperature sensor in the water in the drum, the signal of pressure sensor is exported to the PLC control system by pressure transmitter, the signal of temperature sensor is exported to the PLC control system by temperature transmitter, and display is connected with the PLC control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200945674U CN201582792U (en) | 2009-10-23 | 2009-10-23 | Boiler steam pocket water level measurement and protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200945674U CN201582792U (en) | 2009-10-23 | 2009-10-23 | Boiler steam pocket water level measurement and protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201582792U true CN201582792U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200945674U Expired - Lifetime CN201582792U (en) | 2009-10-23 | 2009-10-23 | Boiler steam pocket water level measurement and protection system |
Country Status (1)
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| CN (1) | CN201582792U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453512A (en) * | 2013-09-24 | 2013-12-18 | 哈尔滨鑫北源电站设备制造有限公司 | Horizontal steam-water separator shell |
| CN104515566A (en) * | 2014-12-19 | 2015-04-15 | 中冶南方工程技术有限公司 | Steam drum liquid level measuring device, system and method |
| CN104614054A (en) * | 2014-10-17 | 2015-05-13 | 中国神华能源股份有限公司 | Method for verifying boiler drum water level or differential pressure measurement accuracy |
| CN104964268A (en) * | 2015-07-23 | 2015-10-07 | 济南裕兴化工有限责任公司 | Automatic water feeding method, using electric contact water level indicator signal, of boiler DSC system |
| CN106940215A (en) * | 2017-02-07 | 2017-07-11 | 沈阳华控科技发展有限公司 | A kind of built-in steam drum liquid level measurement device of intelligent compensation |
-
2009
- 2009-10-23 CN CN2009200945674U patent/CN201582792U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453512A (en) * | 2013-09-24 | 2013-12-18 | 哈尔滨鑫北源电站设备制造有限公司 | Horizontal steam-water separator shell |
| CN104614054A (en) * | 2014-10-17 | 2015-05-13 | 中国神华能源股份有限公司 | Method for verifying boiler drum water level or differential pressure measurement accuracy |
| CN104515566A (en) * | 2014-12-19 | 2015-04-15 | 中冶南方工程技术有限公司 | Steam drum liquid level measuring device, system and method |
| CN104515566B (en) * | 2014-12-19 | 2017-10-13 | 中冶南方工程技术有限公司 | Steam drum liquid level measurement device, system and method |
| CN104964268A (en) * | 2015-07-23 | 2015-10-07 | 济南裕兴化工有限责任公司 | Automatic water feeding method, using electric contact water level indicator signal, of boiler DSC system |
| CN104964268B (en) * | 2015-07-23 | 2017-03-15 | 济南裕兴化工有限责任公司 | The method that Boiler DCS System realizes automatic loading water using electric contact point fluviograph signal |
| CN106940215A (en) * | 2017-02-07 | 2017-07-11 | 沈阳华控科技发展有限公司 | A kind of built-in steam drum liquid level measurement device of intelligent compensation |
| CN106940215B (en) * | 2017-02-07 | 2023-05-16 | 沈阳华控科技发展有限公司 | Intelligent compensation built-in drum liquid level measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100915 |