CN202581274U - Boiler feedwater control system - Google Patents
Boiler feedwater control system Download PDFInfo
- Publication number
- CN202581274U CN202581274U CN 201220139403 CN201220139403U CN202581274U CN 202581274 U CN202581274 U CN 202581274U CN 201220139403 CN201220139403 CN 201220139403 CN 201220139403 U CN201220139403 U CN 201220139403U CN 202581274 U CN202581274 U CN 202581274U
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- China
- Prior art keywords
- boiler
- motor
- boiler feedwater
- type probe
- frequency converter
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Abstract
The utility model belongs to the technical field of heat energy equipment, and more particularly relates to a boiler feedwater control system. The boiler feedwater control system comprises a hand-operated valve, a motor and a water pump, wherein the hand-operated valve is connected with the water pump, and the water pump is connected with the motor; and the boiler feedwater control system further comprises a frequency converter and an electrode-type probe, wherein the frequency converter is connected with the motor, the electrode-type probe is connected with the frequency converter, and the electrode-type probe is arranged in the boiler. The boiler feedwater controls system disclosed by the utility model is sensitive and simple to adjust and control, improved in whole effect and efficiency, capable of saving energy and reducing consumption and correspondingly reduced in manual maintenance cost.
Description
Technical field
The utility model belongs to the thermal hardware technical field, is that system is controlled in a kind of boiler feedwater specifically.
Background technology
In the feed water system of boiler of automatically control, the water level control principle is that system directly opens after obtaining the signal of SEA LEVEL VARIATION or switches off the pump and reaches the purpose that is controlled at boiler water level desired location.Prescribe a time limit when boiler water level drops under the water level, the control system connects the feed pump power supply, and water pump is started working.Feedwater gets into boiler, and water level is risen gradually; Prescribe a time limit when boiler water level rises on the water level, the control system cuts off the feed pump power supply automatically, and water pump quits work.Prescribe a time limit when water level in the boiler drops under the water level through evaporation gradually, the control system connects the feed pump power supply again automatically, and water pump is started working again, so goes round and begins again, and boiler water level is remained between the bound that allows water level, guarantees that boiler runs well.
Generally speaking; Boiler can often not be in the oepration at full load duty, and boiler feed pump or do not start, in case start the state of operating at full capacity that just is in; And, consider during boiler design that the power of supporting feed pump will leave 25% ~ 35% margin of power relatively; So just cause feed pump power greater than the wasting phenomenon of keeping the boiler water level power demand, also caused the frequent start-stop of feed pump.Both cause the power dissipation of pump motor, influenced the service life of pump motor again.
The utility model content
To the problems referred to above, the utility model provides a kind of boiler feedwater control system, and purpose is to carry out Flow-rate adjustment with converter technique, can guarantee safe operation of the boiler again, control to adjust easy, strong operability.
The utility model is realized through following technical scheme: system is controlled in a kind of boiler feedwater; Comprise hand-operated valve, motor, water pump, described hand-operated valve connects water pump, and described water pump connects motor; Also comprise frequency converter, electric pole type probe; Described frequency converter is connected with described motor, and described electric pole type probe is connected with described frequency converter, and described electric pole type probe is installed in the boiler.
As preferably, the waterline at place, the bottom of described electric pole type probe is between the water level upper limit and water level lower limit in the boiler.
As preferably, described electric pole type probe has 5, and the waterline at the place, bottom of these 5 electric pole type probes is inequality.
After the utility model had been taked above-mentioned corrective measure, it is remarkable that it optimizes effect:
(1) in theory, square being directly proportional of flow (gas or liquid) and rotating speed, and cube being directly proportional of energy consumption of electrical machinery and rotating speed will be so when the motor speed that frequency converter is housed reduces, the electric energy of motor actual consumption will significantly reduce.When motor when rated speed 35HZ moves, the power of its consumption is 70% 3 powers of rated power in theory, promptly 34.3%.Remove mechanical loss, influences such as motor copper, iron loss, energy-saving efficiency can reach 50%, just can save half the power consumption, has realized the control of closed loop constant voltage simultaneously, and user's whole cooker furnace system is brought whole improved efficiency.
(2) control convenient and simplely automatically, can guarantee that boiler water level is stabilized in desired location, thereby improve steam quality, satisfy manufacturing technique requirent.
When (3) motor moved under the low frequency state, its noise, heating significantly reduced after motor speed descended, and mechanical wear reduces, and prolong the mechanical life of water pump, the minimizing maintenance load.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1;
1 is hand-operated valve among the figure, the 2nd, and water pump, the 3rd, motor, the 4th, frequency converter, the 5th, electric pole type probe, the 6th, boiler.
The specific embodiment
The contrast accompanying drawing combines embodiment that the utility model is further described below:
With reference to shown in Figure 1, system is controlled in a kind of boiler feedwater among the embodiment 1, boiler feedwater control system; Comprise hand-operated valve, motor, water pump, frequency converter, electric pole type probe; Hand-operated valve connects water pump, and water pump connects motor, and frequency converter is connected with described motor; Frequency converter also is connected with the electric pole type probe; 5 electric pole type probes are set here are installed in the boiler, the waterline at the place, bottom of these 5 electric pole type probes is between the water level upper limit and water level lower limit in the boiler, and the waterline at place, the bottom of these 5 electric pole type probes is inequality.
During boiler operatiopn, boiler internal is installed 5 electric pole type probes, is in different waterlines, is used for gathering the boiler internal water level signal, and this signal is transferred to frequency converter, and frequency converter is just controlled the electricity consumption frequency of pump motor according to boiler water level.Change the water pump feedwater flow through changing water supply pump motor electricity consumption frequency, remain at desired location thereby reach boiler water level.
The specific embodiment of more than enumerating that is merely the utility model.Obviously, the utility model is not limited to above embodiment.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should belong to the protection domain of the utility model.
Claims (4)
1. a boiler feedwater control system comprises hand-operated valve, motor, water pump, and described hand-operated valve connects water pump; Described water pump connects motor; It is characterized in that also comprise frequency converter, electric pole type probe, described frequency converter is connected with described motor; Described electric pole type probe is connected with described frequency converter, and described electric pole type probe is installed in the boiler.
2. system is controlled in boiler feedwater according to claim 1, it is characterized in that, the waterline at the place, bottom of described electric pole type probe is between the water level upper limit and water level lower limit in the boiler.
3. system is controlled in boiler feedwater according to claim 1 and 2, it is characterized in that described electric pole type probe has 5.
4. system is controlled in boiler feedwater according to claim 3, it is characterized in that, the waterline at the place, bottom of described 5 electric pole type probes is inequality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220139403 CN202581274U (en) | 2012-04-05 | 2012-04-05 | Boiler feedwater control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220139403 CN202581274U (en) | 2012-04-05 | 2012-04-05 | Boiler feedwater control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202581274U true CN202581274U (en) | 2012-12-05 |
Family
ID=47250680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220139403 Expired - Fee Related CN202581274U (en) | 2012-04-05 | 2012-04-05 | Boiler feedwater control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202581274U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757633A (en) * | 2021-09-09 | 2021-12-07 | 中广核工程有限公司 | Water level control method and device for steam generator of nuclear power plant and computer equipment |
-
2012
- 2012-04-05 CN CN 201220139403 patent/CN202581274U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757633A (en) * | 2021-09-09 | 2021-12-07 | 中广核工程有限公司 | Water level control method and device for steam generator of nuclear power plant and computer equipment |
| CN113757633B (en) * | 2021-09-09 | 2024-05-24 | 中广核工程有限公司 | Nuclear power plant steam generator water level control method and device and computer equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20210405 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |