CN207228238U - Technique water system in the desulfurizer of thermal power plant - Google Patents
Technique water system in the desulfurizer of thermal power plant Download PDFInfo
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- CN207228238U CN207228238U CN201720419363.8U CN201720419363U CN207228238U CN 207228238 U CN207228238 U CN 207228238U CN 201720419363 U CN201720419363 U CN 201720419363U CN 207228238 U CN207228238 U CN 207228238U
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Abstract
The process water system regions in desulfurizer are the utility model is related to, disclose the technique water system in a kind of thermal power plant desulfurizer.The water inlet of the utility model water tank is connected with process water water inlet pipe, and water outlet of water tank is connected by process water main pipe with variable frequency pump, and first pressure meter is in series with the process water main pipe of variable frequency pump water outlet；Variable frequency pump is electrically connected with frequency-variable controller, and frequency-variable controller is electrically connected with DCS control systems, and first pressure meter is electrically connected with DCS control systems；The water outlet of process water main pipe is connected with machine seal cooling water pipe, slurries wash tub pipe, accident spray header and demister spray header respectively, the first control valve is in series with accident spray header, the second control valve and second pressure meter are sequentially connected in series on demister spray header, the first control valve, the second control valve and second pressure meter are electrically connected with DCS control systems respectively.The utility model is simple in structure, energy consumption is low, water pressure fluctuations are smaller in system.
Description
Technical field
The process water system regions in desulfurizer are the utility model is related to, more particularly to a kind of thermal power plant desulfurization
Technique water system in device.
Background technology
In flue gas desulphurization technique, the technique water system in desulfurizer often includes two technique water pumps, and one is standby
One uses, and power frequency operation, the preceding pressure of demister is typically controlled by self-contained pressure regulator, passes through Self-operated pressure
Regulating valve controls the pressure of pump discharge main pipe, but in actual moving process, problems with easily occurs：One is due to unit
The discontinuous water such as pipeline flushing are carried out when demister in desulfurizer is intermittent to be rinsed, flow inlet line disables, in system
Water consumption fluctuation it is very big, can cause technique water system water supply fluctuate it is larger, the pressure oscillation of technique exit of pump main pipe is big；
Two be due to that the fluctuation of process water system water amount causes self-contained pressure regulator on process water main pipe outlet return pipeline greatly
Aperture changes greatly；Third, when industrial water amount is small, substantial amounts of water returns to water tank again, causes substantial amounts of waste of energy；Four
Be equipment maintenance it is larger, due to there is 2 direct-operated regulators in technique water system, frequent movement, often results in closing not
Sternly, cause leakage rate big, easily cause the damage of demister nozzle and come off, influence mist eliminator flushing effect, cause absorption tower demisting device
Preceding direct-operated regulator, the direct-operated regulator on return line and demister nozzle maintenance capacity increase.
In existing flue gas desulfurization technique, machine seal cooling water, flushing water, spray demisting water and accident shower water etc. use water system
System uses independent water system, and easy to control, but pipeline and water tank set more, site environment complexity, and maintenance cost is higher.
Utility model content
The utility model offer one kind is simple in structure, energy consumption is low, water pressure fluctuations are smaller in system, extends equipment uses the longevity
Technique water system in the thermal power plant desulfurizer of life.
Technical problems to be solved are：In the water system of existing desulfurizer, often controlled using self-contained pressure regulator
The pressure of pump discharge main pipe, water supply fluctuation is larger, and energy waste is serious, and regulating valve service life is short, and maintenance cost is high；It is different
Water system sets water system respectively, and site environment is complicated, and maintenance cost is high.
In order to solve the above technical problems, the utility model adopts the following technical solution：
Technique water system in the desulfurizer of the utility model thermal power plant, including water tank, variable frequency pump, frequency-variable controller
With DCS control systems, the water inlet of water tank is connected with process water water inlet pipe, and water outlet of water tank passes through process water main pipe and variable frequency pump
Connect, first pressure meter is in series with the process water main pipe of variable frequency pump water outlet；The signal input part of variable frequency pump and frequency conversion control
The signal output part of device processed is electrically connected, and the signal input part of frequency-variable controller is electrically connected with the signal output part of DCS control systems,
The signal output part of first pressure meter is electrically connected with the signal input part of DCS control systems；The water outlet difference of process water main pipe
It is connected with machine seal cooling water pipe, slurries wash tub pipe, accident spray header and demister spray header, is gone here and there on accident spray header
Be associated with the first control valve, be sequentially connected in series the second control valve and second pressure meter on demister spray header, the first control valve and
Signal output part of the signal input part of second control valve respectively with DCS control systems is electrically connected, and the signal of second pressure meter is defeated
Outlet is electrically connected with the signal input part of DCS control systems.
Technique water system in the desulfurizer of the utility model thermal power plant, further, further includes a spare change
Frequency pumps, and standby variable frequency pump is connected side by side with variable frequency pump.
Technique water system in the desulfurizer of the utility model thermal power plant, further, the standby variable frequency pump
Signal input part is electrically connected with the signal output part of frequency-variable controller.
Technique water system in the desulfurizer of the utility model thermal power plant, further, further includes flowmeter, described
Flowmeter is connected on process water water inlet pipe.
Technique water system in the desulfurizer of the utility model thermal power plant, further, first control valve and
Second control valve is solenoid valve.
Technique water system in the desulfurizer of the utility model thermal power plant has following beneficial compared with prior art
Effect：
Technique water system in the desulfurizer of the utility model thermal power plant realizes central water supply, unified adjusting water
Amount, according to the use demand of different pipe-line systems, distribution adjusts the hydraulic pressure and stream in the process water main pipe in whole process system
Measure, valve when avoiding using self-contained pressure regulator control discharge pressure frequently switches on action, reduces process water
The abrasion of water supply wide fluctuations and valve in system, improves the operation stability of technique water system, reduces failure
Occurrence frequency, improves production efficiency；Variation in water pressure in process water supervisor is relatively gentle, and without valve transfer, makes whole
Water supply process is soft, smooth；Return water system is not set, greatly reduces the consumption of idle work, the waste of the energy is reduced, improves
Energy utilization rate.The utility model manages technique water system concentratedly using DCS control systems, passes through each water system
Real-time feedback information in service condition and each pipeline, carries out concentrating analysis and synthesis computing, obtains most passing through in process water main pipe
Ji and rational water consumption, control variable frequency pump and each solenoid valve by signal output, realize the switching of various modes, simplify existing
The circuit design of field, reduces maintenance cost and maintenance difficulties.
The technique water system in the thermal power plant desulfurizer of the utility model is made furtherly below in conjunction with the accompanying drawings
It is bright.
Brief description of the drawings
Fig. 1 is the structure diagram of the technique water system in the desulfurizer of the utility model thermal power plant.
Reference numeral：
1- water tanks；11- process water water inlet pipes；12- flowmeters；2- variable frequency pumps；21- standby variable frequencies pump；3- frequency-variable controllers；
4-DCS control systems；5- process water main pipes；51- first pressure meters；6- machine seal cooling water pipes；7- slurries wash tub pipes；8- accidents
Spray header；The first control valves of 81-；9- demister spray headers；The second control valves of 91-；92- second pressure meters.
Embodiment
As shown in Figure 1, the technique water system in the desulfurizer of the utility model thermal power plant includes water tank 1, variable frequency pump
2nd, frequency-variable controller 3 and DCS control systems 4, the water inlet of water tank 1 are connected with process water water inlet pipe 11, process water water inlet pipe 11
On be in series with flowmeter 12,1 water outlet of water tank is connected by process water main pipe 5 with variable frequency pump 2, the work of 2 water outlet of variable frequency pump
First pressure meter 51 is in series with skill jellyfish pipe 5；A standby variable frequency pump 21 is further included, standby variable frequency pump 21 and variable frequency pump 2 are simultaneously
Row connection, variable frequency pump 2 are electrically connected with signal output part of the signal input part of standby variable frequency pump 21 respectively with frequency-variable controller 3,
The signal input part of frequency-variable controller 3 is electrically connected with the signal output part of DCS control systems 4, and the signal of first pressure meter 51 is defeated
Outlet is electrically connected with the signal input part of DCS control systems 4；The water outlet of process water main pipe 5 respectively with machine seal cooling water pipe 6,
Slurries wash tub pipe 7, accident spray header 8 and demister spray header 9 connect, and the first control is in series with accident spray header 8
Valve 81 processed, has been sequentially connected in series the second control valve 91 and second pressure meter 92, the first control valve 81 and on demister spray header 9
Two control valves 91 are solenoid valve, the first control valve 81, the second control valve 91 signal input part respectively with DCS control systems 4
Signal output part be electrically connected, the signal output part of second pressure meter 92 is electrically connected with 4 signal input part of DCS control systems.
The specific work process of technique water system in the desulfurizer of the utility model thermal power plant is as follows：
The industrial water in thermal power plant is entered in water tank 1 by process water water inlet pipe 11, is adopted by DCS control systems 4
Collect each pressure condition with water lines, aggregate information, controls frequency-variable controller 3 to adjust the frequency of variable frequency pump 2 after comprehensive computing
To adjust the water and hydraulic pressure in process water main pipe 5, with it is economical, efficiently for the different uses with water lines, particularly may be divided into
Several situations below：
First, routine water：When desulfurizer need not carry out mist eliminator flushing and accident water tank moisturizing, whole technique water system
As long as meet cooling and the slurries pipeline rinse water pressure of normal machine envelope system equipment, at this time in process water main pipe 5
Pressure compare it is relatively low can both meet to run needs, the dosage of routine water is determined by debugging, and then pass through DCS controls system
The control frequency-variable controller 3 of system 4 sets the output frequency of variable frequency pump 2, meets the system water under regular situation；
2nd, using demister shower water：The opposite increase of mist eliminator flushing hourly water consumption is very much, and demister installation site
It is higher, it is ensured that flushing effect will ensure the discharge pressure at demister nozzle, and the scope of water consumption is determined by debugging, and lead to
DCS control systems 4 are crossed, open the second control valve 91, and control frequency-variable controller 3 to set the output frequency of variable frequency pump 2, pass through reality
When monitor the data of second pressure meter 92 on demister spray header 9, the moment adjusts the output frequency of variable frequency pump 2, to meet
The discharge pressure of demister shower water；
3rd, using accident shower water：When to accident spray water tank carry out moisturizing when, due to accident water tank set position compared with
Height, if realizing, moisturizing must just increase frequency and improve technique water pump main-piping pressure, to ensure the benefit of stable accident spray system
Water, the scope of water consumption is determined by debugging, and by DCS control systems 4, opens the first control valve 81, and control frequency conversion control
The output frequency that device 3 processed sets variable frequency pump 2 reaches higher value, meets upper water and the moisturizing of water tank.
Embodiment described above is only that the preferred embodiment of the utility model is described, not to this practicality
New scope is defined, and on the premise of the spirit of the design of the utility model is not departed from, those of ordinary skill in the art are to this
The various modifications and improvement that the technical solution of utility model is made, should all fall into the protection that the utility model claims book determines
In the range of.
Claims (5)
1. the technique water system in the desulfurizer of thermal power plant, it is characterised in that：Including water tank（1）, variable frequency pump（2）, frequency conversion
Controller（3）With DCS control systems（4）, water tank（1）Water inlet and process water water inlet pipe（11）Connection, water tank（1）Water outlet
Pass through process water main pipe（5）With variable frequency pump（2）Connection, variable frequency pump（2）The process water main pipe of water outlet（5）On be in series with first
Pressure gauge（51）；Variable frequency pump（2）Signal input part and frequency-variable controller（3）Signal output part be electrically connected, frequency-variable controller
（3）Signal input part and DCS control systems（4）Signal output part be electrically connected, first pressure meter（51）Signal output part
With DCS control systems（4）Signal input part be electrically connected；Process water main pipe（5）Water outlet respectively with machine seal cooling water pipe
（6）, slurries wash tub pipe（7）, accident spray header（8）With demister spray header（9）Connection, accident spray header（8）On
It is in series with the first control valve（81）, demister spray header（9）On be sequentially connected in series the second control valve（91）With second pressure meter
（92）, the first control valve（81）With the second control valve（91）Signal input part respectively with DCS control systems（4）Signal output
End is electrically connected, second pressure meter（92）Signal output part and DCS control systems（4）Signal input part be electrically connected.
2. the technique water system in thermal power plant desulfurizer according to claim 1, it is characterised in that：Further include one
A standby variable frequency pump（21）, standby variable frequency pump（21）With variable frequency pump（2）Connection side by side.
3. the technique water system in thermal power plant desulfurizer according to claim 2, it is characterised in that：It is described spare
Variable frequency pump（21）Signal input part and frequency-variable controller（3）Signal output part be electrically connected.
4. the technique water system in thermal power plant desulfurizer according to claim 1, it is characterised in that：Further include stream
Gauge（12）, the flowmeter（12）It is connected on process water water inlet pipe（11）On.
5. the technique water system in thermal power plant desulfurizer according to claim 1, it is characterised in that：Described first
Control valve（81）With the second control valve（91）It is solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720419363.8U CN207228238U (en) | 2017-04-20 | 2017-04-20 | Technique water system in the desulfurizer of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720419363.8U CN207228238U (en) | 2017-04-20 | 2017-04-20 | Technique water system in the desulfurizer of thermal power plant |
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| CN207228238U true CN207228238U (en) | 2018-04-13 |
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| CN201720419363.8U Active CN207228238U (en) | 2017-04-20 | 2017-04-20 | Technique water system in the desulfurizer of thermal power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403417A (en) * | 2018-11-28 | 2019-03-01 | 北京国电龙源环保工程有限公司 | A kind of desulfurization municipal water supply system |
| CN109613877A (en) * | 2018-11-13 | 2019-04-12 | 北京国电龙源环保工程有限公司 | Intelligent mobile operation order DCS closed loop verification method and device |
-
2017
- 2017-04-20 CN CN201720419363.8U patent/CN207228238U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613877A (en) * | 2018-11-13 | 2019-04-12 | 北京国电龙源环保工程有限公司 | Intelligent mobile operation order DCS closed loop verification method and device |
| CN109613877B (en) * | 2018-11-13 | 2020-08-25 | 北京国电龙源环保工程有限公司 | Intelligent mobile operation ticket DCS closed-loop verification method and device |
| CN109403417A (en) * | 2018-11-28 | 2019-03-01 | 北京国电龙源环保工程有限公司 | A kind of desulfurization municipal water supply system |
| CN109403417B (en) * | 2018-11-28 | 2024-06-25 | 国能龙源环保有限公司 | Desulfurization emergency water source system |
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| GR01 | Patent grant | ||
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Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |