CN204007784U - A kind of drum pressure difference water gauge measuring system dropping into water filling - Google Patents
A kind of drum pressure difference water gauge measuring system dropping into water filling Download PDFInfo
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- CN204007784U CN204007784U CN201420416601.6U CN201420416601U CN204007784U CN 204007784 U CN204007784 U CN 204007784U CN 201420416601 U CN201420416601 U CN 201420416601U CN 204007784 U CN204007784 U CN 204007784U
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- drum
- desuperheating
- water filling
- measurement device
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Abstract
The utility model discloses a kind of drum pressure difference water gauge measuring system dropping into water filling, comprise the desuperheating water flow measurement device being connected with water supply system by pipeline, desuperheating water flow measurement device is connected with main steam equipment with drum respectively by superheater, on described drum, be connected with the steam water-level differential pressure transmitter connecting by equalizing reservoir, on described desuperheating water flow measurement device, be connected with desuperheating water difference in flow pressure transmitter; Between desuperheating water flow measurement device and desuperheating water difference in flow pressure transmitter and the steam water-level differential pressure transmitter being connected on drum, be connected with water filling reverse checkvalve and water filling stop valve.This system utilizes desuperheating water of superheater stopple coupon to carry out water filling to differential pressure type Drum Level Measurement System, and differential pressure type Drum Level Measurement System malleation side full water has guaranteed the accurately fixed of measurement, and adopt water quality good desuperheating water has guaranteed the stability of measuring simultaneously.
Description
Technical field
The utility model belongs to steam turbine power generation technical field, relates to a kind of drum pressure difference water gauge measuring system dropping into water filling.
Background technology
Level Measuring Equipment in Steam Drum is divided into three kinds according to measuring principle: with the two-colour fluviograph of industrial television; Electric contact point fluviograph and pressure difference water gauge (two kinds of minute single-compartment balance container and two chambers equalizing reservoirs).In 300MW and above grade drum boiler generating plant, substantially all adopt single-compartment balance container pressure difference water gauge; and it is all for the automatic adjusting of steam water-level and boiler MFT protection, so the stability and the security that directly have influence on boiler operatiopn of its accuracy of measuring and reliability.
Drum pressure difference water gauge measuring system comprises equalizing reservoir and differential pressure transmitter, and sampling drainage pipeline and valve, as shown in Figure 1.Equalizing reservoir major function is that to maintain level measuring malleation side comparing water column stable, and differential pressure transmitter major function is delivered to scattered control system (DCS) and has been convenient to monitor, regulated and protection for the differential pressure signal collecting being changed into electric signal.
Due to drum pressure difference water gauge measuring principle and the process system feature of boosting, and the effects limit such as water requirement in actual motion start-up course, steam water-level will show accurately, and malleation side must full water, and water quality must reach requirement.But the following several situations of existence cause drum pressure difference water gauge to be difficult to drop into or the rear measurement of input is inaccurate, mainly comprise:
1, new-built unit boiler is lighted a fire during blowpipe first, boiler water quality is poor, and drum pressure difference water gauge malleation side is without water injection hole (pressure rating is high can not open water injection hole on equalizing reservoir), need after working the full water that could condense by condensing mode after pressing the long period, could use in boiler, even if drop into also, can occur because water quality inferiority causes situations such as measuring inaccurate or transmitter obstruction, make a big impact to the security monitoring of steam water-level during boiler blow piping.
2, after the long-term shutdown of unit maintenance; equalizing reservoir and downtake condensate water are in debt; need after boiler works the full water that could condense by condensing mode after pressing the long period, could use, cannot guarantee boiler startup level monitoring in earlier stage, easily cause boiler-steam dome full water and lack of water accident.
3, adopt condensing mode must rinse stopple coupon before steam water-level drops into; the most of unit steam water-level of northern China meter differential pressure measurement stopple coupon all has companion's heat circuit; during flushing, stopple coupon excess Temperature easily causes companion's heat circuit to scorch and the fault that is short-circuited; cause accompanying heat to drop into; easily there is frozen pipe winter; and then it is inaccurate to affect drum level measurement, Steam Drum Water-level Protection misoperation.
4, adopting is pressure difference water gauge malleation side waterflood project to boiler filling up water, water level ascensional range surpasses two-colour fluviograph and electric contact measurement range, easily cause drum full water, cause superheater water inlet, igniting boost after water entrained by steam easily cause water slug major accident.
Utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of drum pressure difference water gauge measuring system dropping into water filling is provided, this system utilizes desuperheating water of superheater stopple coupon to carry out water filling to differential pressure type Drum Level Measurement System, differential pressure type Drum Level Measurement System malleation side full water has guaranteed the accurately fixed of measurement, and adopt water quality good desuperheating water has guaranteed the stability of measuring simultaneously.
The purpose of this utility model is to solve by the following technical programs the problems referred to above:
A kind of drum pressure difference water gauge measuring system dropping into water filling, comprise drum pressure difference water gauge measuring system, with and by pipeline, be connected with desuperheating water Flow Measuring System with valve, on described drum, be connected with the steam water-level differential pressure transmitter connecting by equalizing reservoir, on described desuperheating water flow measurement device, be connected with desuperheating water difference in flow pressure transmitter; Between desuperheating water flow measurement device and desuperheating water difference in flow pressure transmitter and the steam water-level differential pressure transmitter being connected on drum, be connected with water filling reverse checkvalve and water filling stop valve.
Preferably, the positive pole of described differential pressure of water level transmitter is connected with drum by valve respectively with negative pole.
Preferably, described water filling reverse checkvalve is connected mutually successively with water filling stop valve, and described water filling reverse checkvalve is connected with negative pole with the positive pole of differential pressure of water level transmitter respectively.
Preferably, described water filling stop valve connects respectively desuperheating water flow measurement device and desuperheating water difference in flow pressure transmitter.
Preferably, described steam water-level differential pressure transmitter and desuperheating water flow measurement device are connected to respectively blow-off line.
Select desuperheating water flow measurement stopple coupon as follows as water source water filling advantage:
1, water quality is good: desuperheating water drops into the essential condition as boiler blow piping, so go up the front desuperheating water pipeline of water before boiler blow piping first, has rinsed completely, and water quality can be guaranteed.
2, improvement expenses is low: compare other water resource system desuperheating water Flow Measuring Systems and Drum Level Measurement System installation site comparatively approaching, it is very low that system is installed Meteorological.
3, desuperheating water flow does not generally participate in regulating and protection, only as supervisory signal, so even its measuring system is impacted, can not have influence on any system operation of boiler yet.
4, drop into safety: two measuring system pressure approach, and it is convenient to rinse and drop into, and can not cause damage to differential pressure transmitter.
Based on desuperheating water Flow Measuring System, as features such as the water quality at water filling water source, Meteorological, input safety, and solved that routine measurement system difficultly drops into, the shortcoming such as unstable.Before the utility model can guarantee raise steam, water level normally drops into, and prevent that water quality from affecting measuring system, can also avoid water-level gauge to rinse and cause companion's cause thermal damage, and then guaranteed that boiler measures accurately in the safety and stability of all operating mode water drum water levels, for operations staff and varitrol provide reliable foundation, for safe operation of the boiler provides favourable guarantee.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, does not form to improper restriction of the present utility model, in the accompanying drawings:
Fig. 1 is the drum pressure difference water gauge measuring system figure of prior art;
Fig. 2 is the drum pressure difference water gauge measuring system figure that the water filling of the utility model band drops into.
Wherein: 1, equalizing reservoir; 2, steam water-level differential pressure transmitter; 3, water filling reverse checkvalve; 4, water filling stop valve; 5, desuperheating water flow measurement device; 6, desuperheating water difference in flow pressure transmitter; 7, superheater; 8, drum.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, describe the utility model in detail, in this illustrative examples of the present utility model and explanation, be used for explaining the utility model, but not as to restriction of the present utility model.
As shown in Figure 2, a kind of drum pressure difference water gauge measuring system dropping into water filling, comprise the desuperheating water flow measurement device 5 being connected with water supply system by pipeline, desuperheating water flow measurement device 5 is connected with main steam equipment with drum 8 respectively by superheater 7, on described drum 8, be connected with the steam water-level differential pressure transmitter 2 connecting by equalizing reservoir 1, on described desuperheating water flow measurement device 5, be connected with desuperheating water difference in flow pressure transmitter 6; Wherein, between desuperheating water flow measurement device 5 and desuperheating water difference in flow pressure transmitter 6 and the steam water-level differential pressure transmitter 2 being connected on drum 8, be connected with water filling reverse checkvalve 3 and water filling stop valve 4.
Wherein, the positive pole of differential pressure of water level transmitter 2 is connected with drum 8 by valve respectively with negative pole.Water filling reverse checkvalve 3 is connected mutually successively with water filling stop valve 4, and described water filling reverse checkvalve 3 is connected with negative pole with the positive pole of differential pressure of water level transmitter 2 respectively.Water filling stop valve 4 connects respectively desuperheating water flow measurement device 5 and desuperheating water difference in flow pressure transmitter 6.Steam water-level differential pressure transmitter 2 and desuperheating water flow measurement device 5 are connected to respectively blow-off line.
The utility model, by increasing desuperheating water of superheater sampling system to drum pressure difference water gauge sampling system pipeline, arranges water filling reverse checkvalve and water filling stop valve on pipeline.By water filling stop valve the high desuperheating water conducting of water quality to steam water-level pressure difference water gauge stopple coupon.First by steam water-level pressure difference water gauge blowoff valve, its positive and negative pressure side pipe road is rinsed, then close blowoff valve malleation side is carried out to water filling, after water filling completes, close water filling stop valve.Water filling reverse checkvalve object is to prevent that water filling stop valve is not tight, and drum pressure difference water gauge stopple coupon water flow to desuperheating water sampling system, causes measuring inaccurate.
The technical scheme above the utility model embodiment being provided is described in detail, applied specific case herein the principle of the utility model embodiment and embodiment are set forth, the explanation of above embodiment is only applicable to help to understand the principle of the utility model embodiment; , for one of ordinary skill in the art, according to the utility model embodiment, in embodiment and range of application, all will change, in sum, this description should not be construed as restriction of the present utility model meanwhile.
Claims (5)
1. the drum pressure difference water gauge measuring system dropping into water filling, comprise the desuperheating water flow measurement device being connected with water supply system by pipeline, desuperheating water flow measurement device is connected with main steam equipment with drum respectively by superheater, it is characterized in that: on described drum, be connected with the steam water-level differential pressure transmitter connecting by equalizing reservoir, on described desuperheating water flow measurement device, be connected with desuperheating water difference in flow pressure transmitter; Between desuperheating water flow measurement device and desuperheating water difference in flow pressure transmitter and the steam water-level differential pressure transmitter being connected on drum, be connected with water filling reverse checkvalve and water filling stop valve.
2. a kind of drum pressure difference water gauge measuring system dropping into water filling according to claim 1, is characterized in that: the positive pole of described differential pressure of water level transmitter is connected with drum by valve respectively with negative pole.
3. a kind of drum pressure difference water gauge measuring system dropping into water filling according to claim 2, it is characterized in that: described water filling reverse checkvalve is connected mutually successively with water filling stop valve, described water filling reverse checkvalve is connected with negative pole with the positive pole of differential pressure of water level transmitter respectively.
4. a kind of drum pressure difference water gauge measuring system dropping into water filling according to claim 3, is characterized in that: described water filling stop valve connects respectively desuperheating water flow measurement device and desuperheating water difference in flow pressure transmitter.
5. a kind of drum pressure difference water gauge measuring system dropping into water filling according to claim 1, is characterized in that: described steam water-level differential pressure transmitter and desuperheating water flow measurement device are connected to respectively blow-off line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420416601.6U CN204007784U (en) | 2014-07-25 | 2014-07-25 | A kind of drum pressure difference water gauge measuring system dropping into water filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420416601.6U CN204007784U (en) | 2014-07-25 | 2014-07-25 | A kind of drum pressure difference water gauge measuring system dropping into water filling |
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| Publication Number | Publication Date |
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| CN204007784U true CN204007784U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420416601.6U Expired - Fee Related CN204007784U (en) | 2014-07-25 | 2014-07-25 | A kind of drum pressure difference water gauge measuring system dropping into water filling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043498A (en) * | 2015-04-30 | 2015-11-11 | 中石化宁波工程有限公司 | Differential pressure liquid level measuring device |
| CN107052003A (en) * | 2017-06-05 | 2017-08-18 | 浙江国际海运职业技术学院 | Boiler water gauge flusher and boiler water gauge purging method |
| CN107842844A (en) * | 2017-11-27 | 2018-03-27 | 华电电力科学研究院 | A kind of efficient temperature reducing system of superheated steam and intelligent control method |
| CN108759781A (en) * | 2018-06-11 | 2018-11-06 | 武汉二航路桥特种工程有限责任公司 | The vertical displacement monitoring device and method of initial big height difference structure |
-
2014
- 2014-07-25 CN CN201420416601.6U patent/CN204007784U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043498A (en) * | 2015-04-30 | 2015-11-11 | 中石化宁波工程有限公司 | Differential pressure liquid level measuring device |
| CN107052003A (en) * | 2017-06-05 | 2017-08-18 | 浙江国际海运职业技术学院 | Boiler water gauge flusher and boiler water gauge purging method |
| CN107842844A (en) * | 2017-11-27 | 2018-03-27 | 华电电力科学研究院 | A kind of efficient temperature reducing system of superheated steam and intelligent control method |
| CN107842844B (en) * | 2017-11-27 | 2024-01-05 | 华电电力科学研究院有限公司 | Superheated steam efficient temperature reduction system and intelligent control method |
| CN108759781A (en) * | 2018-06-11 | 2018-11-06 | 武汉二航路桥特种工程有限责任公司 | The vertical displacement monitoring device and method of initial big height difference structure |
| CN108759781B (en) * | 2018-06-11 | 2024-01-16 | 中交特种工程有限公司 | Vertical displacement monitoring device and method for initial large-height-difference structure |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180504 Address after: 710065 No. 2, unit A7, Fenglin oasis, two tech four road, Yanta District, Xi'an, Shaanxi, 1601 Patentee after: Luo Zheng Address before: 710065 room 1001, block D, Tang Feng International Plaza, Fenghui South Road, Xi'an, Shaanxi. Patentee before: XI'AN XINGYI START UP GENERATE ELECTRICITY COMMISSIONING CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20200725 |