CN104500435A - Automatic adjusting device and method of water-feeding pump for labyrinth sealed boiler - Google Patents
Automatic adjusting device and method of water-feeding pump for labyrinth sealed boiler Download PDFInfo
- Publication number
- CN104500435A CN104500435A CN201410665438.1A CN201410665438A CN104500435A CN 104500435 A CN104500435 A CN 104500435A CN 201410665438 A CN201410665438 A CN 201410665438A CN 104500435 A CN104500435 A CN 104500435A
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- China
- Prior art keywords
- water
- measuring device
- sealing
- return
- feed pump
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention discloses an automatic adjusting device and method of a water-feeding pump for a labyrinth sealed boiler. The automatic adjusting device comprises a sealing water incoming measuring device, a sealing water return measuring device, a data control device and an actuator. The data control device is connected with the sealing water incoming measuring device, the sealing water return measuring device and the actuator. The sealing water incoming measuring device is mounted on an incoming pipeline. The sealing water return measuring device is mounted on a return pipeline. The data control device receives data from the sealing water incoming measuring device and the sealing water return measuring device and controls the actuator to corresponding operate according to the incoming and return data received. The automatic adjusting device and method has the advantages that the water-feeding pump for the labyrinth sealed boiler can be automatically adjusted, high-parameter return water is avoided flowing back to a condenser, and a unit is more economical.
Description
Technical field
The present invention relates to boiler feed water Pump Shaft Seal field, particularly a kind of labyrinth sealing boiler feed pump automatic regulating apparatus and method.
Background technique
Labyrinth sealing has safe and reliable feature, be subject to the extensive favor of high pressure-temperature boiler feed pump, as shown in Figure 1: in pump High Temperature High Pressure deaerated feedwater p0, t0 reducing pressure by regulating flow after with after water of condensation p1, the t1 of lower temperature offset and mix in labyrinth seal first chamber, continue throttling to second chamber, backwater p2, t2 enter vapour condenser by " U " type, and backwater parameter p 2, the t2 quality to the Economy of unit and feedwater produces considerable influence.Existing apparatus is not owing to having automatic adjustment system, the problem brought is if higher backwater parameter gets back to vapour condenser, then reduce the Economy of unit, if the sealing water parameter entered is higher than in feed water pump, then have more water of condensation enter deoxygenation after feedwater in, easily cause and transfinite to indexs such as water-soluble oxygens, and be unfavorable for the warming-up of the feed water pump pump housing.
Summary of the invention
The object of this patent is exactly to solve the problem, propose a kind of labyrinth sealing boiler feed pump automatic regulating apparatus and method, this device and method can realize the automatic adjustment of labyrinth sealing boiler feed pump, avoid higher backwater parameter and get back to vapour condenser, improve the Economy of unit.
To achieve these goals, the present invention adopts following technological scheme:
A kind of labyrinth sealing boiler feed pump automatic regulating apparatus, comprising: sealing water water inlet measuring device, sealing water backwater measuring device, data control unit and actuator; Described data control unit and sealing water intake measuring device, seal water backwater measuring device and actuator is connected respectively;
Described sealing water water inlet measuring device is arranged on inlet pipeline, sealing water backwater measuring device is arranged on water return pipeline, data control unit receives the data of sealing water water inlet measuring device and sealing water backwater measuring device, and according to receive enter, backwater survey data controls actuator and completes corresponding operating.
Described sealing water water inlet measuring device comprises intake pressure measuring point and entering water temp measuring point.
Described sealing water backwater measuring device comprises return water temperature measuring point and pressure of return water measuring point.
An adjusting method for labyrinth sealing boiler feed pump automatic regulating apparatus, comprising:
(1) measure intake pressure p1, entering water temp t1, the pressure of return water p2 and return water temperature t2 of labyrinth sealing boiler feed pump respectively, and described data are sent to data control unit;
(2) data control unit by measure in step (1) enter, pressure of return water and enter, return water temperature compares calculating respectively, judge the entering of labyrinth sealing boiler feed pump, pressure of return water and enter, whether the deviation of return water temperature depart from setting value, namely calculates p2-p1, t respectively
2-t
1value whether depart from setting value Δ p and Δ t, if at least one departs from setting value, then proceed to next step; Otherwise, return step (1);
(3) data control unit sends the valve opening that instruction adjusts the water inlet of sealing water automatically, make the entering of labyrinth sealing boiler feed pump, pressure of return water and enter, the deviation of return water temperature returns to setting value.
In described step (2) the entering of labyrinth sealing boiler feed pump, pressure of return water and enter, the error set point of return water temperature determines according to physical device application.
Beneficial effect of the present invention: the present invention can realize the automatic adjustment of labyrinth sealing boiler feed pump, avoids higher backwater parameter and gets back to vapour condenser, improve the Economy of unit; Avoid the sealing water parameter entered higher than in feed water pump simultaneously, in the feedwater after causing more water of condensation to enter deoxygenation, make to transfinite to indexs such as water-soluble oxygens; Warming-up for the feed water pump pump housing has active influence.
Accompanying drawing explanation
Fig. 1 is existing boiler feed pump labyrinth gland schematic diagram;
Fig. 2 is boiler feed pump labyrinth seal automatic regulating apparatus schematic diagram of the present invention.
Wherein, 1. seal water water inlet measuring device, 2. seal water backwater measuring device, 3. data control unit, 4. actuator.Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 2, labyrinth sealing boiler feed pump automatic regulating apparatus, comprising: sealing water water inlet measuring device 1, sealing water backwater measuring device 2, data control unit 3 and actuator 4; Data control unit 3 and sealing water intake measuring device 1, seal water backwater measuring device 2 and actuator 4 is connected respectively.
Sealing water water inlet measuring device 1 measures sealing water flooding parameter p1, t1, sealing water water recovery apparatus 2 measures sealing water backwater parameter p 2, t2, the water inlet measured and backwater parameter are compared calculating by data control unit 3, in both differences, at least one departs from definite value Δ p or Δ t, then automatically adjusted the valve opening of sealing water water inlet by actuator 4, eliminate to depart from and recover definite value Δ p, Δ t.The numerical quantities of definite value Δ p, Δ t is then applied by equipment and actually to be determined, automatically meets labyrinth seal requirement.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but the restriction not to invention protection domain; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (5)
1. a labyrinth sealing boiler feed pump automatic regulating apparatus, is characterized in that, comprising: sealing water water inlet measuring device, sealing water backwater measuring device, data control unit and actuator; Described data control unit and sealing water intake measuring device, seal water backwater measuring device and actuator is connected respectively;
Described sealing water water inlet measuring device is arranged on inlet pipeline, sealing water backwater measuring device is arranged on water return pipeline, data control unit receives the data of sealing water water inlet measuring device and sealing water backwater measuring device, and according to receive enter, backwater survey data controls actuator and completes corresponding operating.
2. a kind of labyrinth sealing boiler feed pump automatic regulating apparatus as claimed in claim 1, is characterized in that, described sealing water water inlet measuring device comprises intake pressure measuring point and entering water temp measuring point.
3. a kind of labyrinth sealing boiler feed pump automatic regulating apparatus as claimed in claim 1, is characterized in that, described sealing water backwater measuring device comprises return water temperature measuring point and pressure of return water measuring point.
4. an adjusting method for labyrinth sealing boiler feed pump automatic regulating apparatus as claimed in claim 1, is characterized in that, comprising:
(1) measure intake pressure p1, entering water temp t1, the pressure of return water p2 and return water temperature t2 of labyrinth sealing boiler feed pump respectively, and described data are sent to data control unit;
(2) data control unit by measure in step (1) enter, pressure of return water and enter, return water temperature compares calculating respectively, judge the entering of labyrinth sealing boiler feed pump, pressure of return water and enter, whether the deviation of return water temperature depart from setting value, namely calculates p2-p1, t respectively
2-t
1value whether depart from setting value Δ p and Δ t, if at least one departs from setting value, then proceed to next step; Otherwise, return step (1);
(3) data control unit sends the valve opening that instruction adjusts the water inlet of sealing water automatically, make the entering of labyrinth sealing boiler feed pump, pressure of return water and enter, the deviation of return water temperature returns to setting value.
5. the adjusting method of a kind of labyrinth sealing boiler feed pump automatic regulating apparatus as claimed in claim 4, it is characterized in that, in described step (2) the entering of labyrinth sealing boiler feed pump, pressure of return water and enter, the error set point of return water temperature determines according to physical device application.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410665438.1A CN104500435B (en) | 2014-11-19 | 2014-11-19 | A kind of labyrinth sealing boiler feed pump automatic regulating apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410665438.1A CN104500435B (en) | 2014-11-19 | 2014-11-19 | A kind of labyrinth sealing boiler feed pump automatic regulating apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104500435A true CN104500435A (en) | 2015-04-08 |
| CN104500435B CN104500435B (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410665438.1A Active CN104500435B (en) | 2014-11-19 | 2014-11-19 | A kind of labyrinth sealing boiler feed pump automatic regulating apparatus and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN104500435B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386992A (en) * | 2015-12-08 | 2016-03-09 | 国网山东省电力公司电力科学研究院 | Optimal control system based on draught fan power output dynamic balance and method |
| CN107195340A (en) * | 2017-05-12 | 2017-09-22 | 辽宁红沿河核电有限公司 | It is a kind of based on method and system of the refined condensate treatment amount to Nuclear Power Station Condensers leakage detection |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04347071A (en) * | 1991-05-23 | 1992-12-02 | Hitachi Ltd | Shaft sealing device |
| JPH11280687A (en) * | 1998-03-25 | 1999-10-15 | Mitsubishi Heavy Ind Ltd | High temperature pump |
| JP3358993B2 (en) * | 1998-09-21 | 2002-12-24 | 三菱重工業株式会社 | Automatic adjustment seal for turbo rotating machine |
| CN201162713Y (en) * | 2008-07-24 | 2008-12-10 | 上海电力修造总厂有限公司 | Non-unloading water supply pump labyrinth seal apparatus |
| CN202547703U (en) * | 2012-03-15 | 2012-11-21 | 河北省电力研究院 | Labyrinth-seal type seal water-carrying capacity online measurement device of water feeding pump |
| CN203784920U (en) * | 2014-04-16 | 2014-08-20 | 广东大唐国际潮州发电有限责任公司 | Water level regulation device of sealing water multilevel water seal of water feed pump |
| CN204283982U (en) * | 2014-11-19 | 2015-04-22 | 国家电网公司 | A kind of labyrinth sealing boiler feed pump automatic regulating apparatus |
-
2014
- 2014-11-19 CN CN201410665438.1A patent/CN104500435B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04347071A (en) * | 1991-05-23 | 1992-12-02 | Hitachi Ltd | Shaft sealing device |
| JPH11280687A (en) * | 1998-03-25 | 1999-10-15 | Mitsubishi Heavy Ind Ltd | High temperature pump |
| JP3358993B2 (en) * | 1998-09-21 | 2002-12-24 | 三菱重工業株式会社 | Automatic adjustment seal for turbo rotating machine |
| CN201162713Y (en) * | 2008-07-24 | 2008-12-10 | 上海电力修造总厂有限公司 | Non-unloading water supply pump labyrinth seal apparatus |
| CN202547703U (en) * | 2012-03-15 | 2012-11-21 | 河北省电力研究院 | Labyrinth-seal type seal water-carrying capacity online measurement device of water feeding pump |
| CN203784920U (en) * | 2014-04-16 | 2014-08-20 | 广东大唐国际潮州发电有限责任公司 | Water level regulation device of sealing water multilevel water seal of water feed pump |
| CN204283982U (en) * | 2014-11-19 | 2015-04-22 | 国家电网公司 | A kind of labyrinth sealing boiler feed pump automatic regulating apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386992A (en) * | 2015-12-08 | 2016-03-09 | 国网山东省电力公司电力科学研究院 | Optimal control system based on draught fan power output dynamic balance and method |
| CN107195340A (en) * | 2017-05-12 | 2017-09-22 | 辽宁红沿河核电有限公司 | It is a kind of based on method and system of the refined condensate treatment amount to Nuclear Power Station Condensers leakage detection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104500435B (en) | 2016-08-24 |
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