CN205714775U - A kind of water ring vacuum pump monitor control system - Google Patents
A kind of water ring vacuum pump monitor control system Download PDFInfo
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- CN205714775U CN205714775U CN201620685128.0U CN201620685128U CN205714775U CN 205714775 U CN205714775 U CN 205714775U CN 201620685128 U CN201620685128 U CN 201620685128U CN 205714775 U CN205714775 U CN 205714775U
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- circulating water
- back pressure
- water flow
- pressure condenser
- flow gauge
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Abstract
The utility model discloses a kind of water ring vacuum pump monitor control system, this water ring vacuum pump monitor control system includes high back pressure condenser, low back pressure condenser and circulating water line, it is characterized in that: also include that DCS controls terminal, circulating water flow measurement system, circulating water temperature measurement system and circulating water refrigeration system, circulating water flow measurement system, circulating water temperature measure system and circulating water refrigeration system all controls terminal with DCS and is electrically connected with.This utility model has the advantage that the anti-water ring pump suction capactity that pushes away of use cleanliness factor recovers after condenser pressure compared to existing technology, it was predicted that go out ON cycle water refrigeration system after condenser pressure change size；By this utility model, can be to provide data-guiding the need of ON cycle water refrigeration system, energy-saving effect be more preferable；On vacuum lead, configure Ultrasonic Wave Flowmeter, in order to monitor water ring vacuum pump suction capactity state constantly, provide meaning for running operation.
Description
Technical field
This utility model relates to Saving energy in Steam Turbine technical field, in particular one water ring vacuum pump Monitoring and Controlling system
System.
Background technology
Due to water ring vacuum pump compact conformation, the rotating speed of pump is higher, typically can be with motor direct connection, without deceleration device,
By little physical dimension, it is possible to obtain big capacity, the advantages such as floor space is the least, Large-scale fire-electricity unit vacuum all configures water
Ring vacuum pump.
But water ring vacuum pump exhaust capacity is easily affected by working solution temperature, fired power generating unit, under the conditions of summer high temperature, works
Liquid temp raise after, inspiration capacity substantially reduces, will affect unit vacuum, reduction unit efficiency, cause unit coal consumption to increase.
Reducing exhaust capacity for avoiding water ring vacuum pump to be affected by working solution temperature, part of generating units selects to install recirculated water
Refrigeration system, reduces working solution temperature, recovers water ring vacuum pump exhaust capacity.But thermal power unit operation personnel cannot accurately sentence
Disconnected when needs puts into circulating water refrigeration system, causes ON cycle water refrigeration system the most in advance, station service will be caused to expend
The increase of amount.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of water ring vacuum pump Monitoring and Controlling system
System.
This utility model is achieved through the following technical solutions: a kind of water ring vacuum pump monitor control system, including height
Back pressure condenser, low back pressure condenser and circulating water line, circulating water line is divided into the first circulating water line and the second circulation
Water lines, the first circulating water line and the second circulating water line all flow to high back pressure condenser, low back pressure from low back pressure condenser
Condenser is connected by the first vacuum lead and the first water ring vacuum pump, high back pressure condenser by the second vacuum lead and
Second water ring vacuum pump connects, it is characterised in that: water ring vacuum pump monitor control system also includes that DCS controls terminal, recirculated water
Flow Measuring System, circulating water temperature measure system and circulating water refrigeration system, circulating water flow measurement system, circulating water temperature
Measurement system and circulating water refrigeration system all control terminal with DCS and are electrically connected with；
Circulating water flow measurement system includes the first circulating water flow gauge, the second circulating water flow gauge, the 3rd circulating water flow
Gauge, the 4th circulating water flow gauge, the 5th circulating water flow gauge and the 6th circulating water flow gauge；First circulating water flow gauge,
Two-cycle effusion meter and the 3rd circulating water flow gauge are arranged on the first circulating water line, and the first circulating water flow gauge is positioned at
The upstream of back pressure condenser, second gauge is between low back pressure condenser and high back pressure condenser, and the 3rd effusion meter is positioned at
The downstream of high back pressure condenser；4th circulating water flow gauge, the 5th circulating water flow gauge and the 6th circulating water flow gauge are arranged at
On second circulating water line, the upstream of the back pressure condenser that the 4th circulating water flow gauge is positioned at, the 5th effusion meter is positioned at low back pressure
Between condenser and high back pressure condenser, the 6th effusion meter is positioned at the downstream of high back pressure condenser；
Circulating water temperature is measured system and is included six temperature points, and the first temperature point is arranged on the first circulating water line
On, it being positioned at the upstream of low back pressure condenser, the second temperature point is arranged on the second circulating water line, is positioned at low back pressure condenser
Upstream, the 3rd temperature point and the 4th temperature point be arranged on first circulating water line in high back pressure condenser downstream,
Five temperature points and the 6th temperature point are arranged on second circulating water line in high back pressure condenser downstream.
As further improvement of these options, the first circulating water flow gauge, the second circulating water flow gauge, the 3rd circulation
Water ga(u)ge, the 4th circulating water flow gauge, the 5th circulating water flow gauge and the 6th circulating water flow gauge all select ultrasonic flow
Meter.
As further improvement of these options, also include gas flow measurement system, gas flow measurement system bag
Include the first gas flowmeter being arranged on the first vacuum lead and volume the second gas being arranged on the second vacuum lead
Effusion meter.
As further improvement of these options, the first gas flowmeter and the second gas flowmeter all select gas to surpass
Acoustic wave flow meter.
This utility model has the advantage that this utility model cleanliness factor is counter compared to existing technology and pushes away water ring pump suction
Ability recovers after condenser pressure, it was predicted that go out ON cycle water refrigeration system after condenser pressure change size；By this practicality
Novel, can be to provide data-guiding the need of ON cycle water refrigeration system, energy-saving effect is more preferable；At vacuum lead
On, configure Ultrasonic Wave Flowmeter, in order to monitor water ring vacuum pump suction capactity state constantly, provide meaning for running operation
Justice.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Fig. 2 is the schematic flow sheet that this programme optimization runs.
Fig. 3 is cooling tube water temperature correction coefficient curves.
Detailed description of the invention
Elaborating embodiment of the present utility model below, the present embodiment is being front with technical solutions of the utility model
Put and implement, give detailed embodiment and concrete operating process, but protection domain of the present utility model does not limits
In following embodiment.
Embodiment 1
A kind of water ring vacuum pump monitor control system, including high back pressure condenser 2, low back pressure condenser 1 and recirculated water
Pipeline, circulating water line is divided into the first circulating water line 11 and the second circulating water line 12, the first circulating water line 11 and second
Circulating water line 12 all flows to high back pressure condenser 2 from low back pressure condenser 1, and low back pressure condenser 1 is by the first vacuum-pumping tube
Road 21 is connected with the first water ring vacuum pump 3, and high back pressure condenser 2 is by the second vacuum lead 22 and the second water ring vacuum pump 4
Connect, it is characterised in that: water ring vacuum pump monitor control system also include DCS control terminal 8, circulating water flow measurement system,
Circulating water temperature measures system and circulating water refrigeration system 9, and circulating water flow measurement system, circulating water temperature are measured system and follow
Ring water refrigeration system 9 all controls terminal 8 with DCS and is electrically connected with；
Circulating water flow measurement system includes first circulating water flow gauge the 61, second circulating water flow gauge the 62, the 3rd circulation
Water ga(u)ge the 63, the 4th circulating water flow gauge the 64, the 5th circulating water flow gauge 65 and the 6th circulating water flow gauge 66；First circulation
Water ga(u)ge the 61, second circulating water flow gauge 62 and the 3rd circulating water flow gauge 63 are arranged on the first circulating water line 11, the
The upstream of the back pressure condenser that one circulating water flow gauge 61 is positioned at, second gauge is positioned at low back pressure condenser 1 and high back pressure coagulates
Between vapour device 2, the 3rd effusion meter is positioned at the downstream of high back pressure condenser 2；4th circulating water flow gauge the 64, the 5th circulating water flow
Meter 65 and the 6th circulating water flow gauge 66 are arranged on the second circulating water line 12, the back pressure that the 4th circulating water flow gauge 64 is positioned at
The upstream of condenser, the 5th effusion meter is between low back pressure condenser 1 and high back pressure condenser 2, and the 6th effusion meter is positioned at height
The downstream of back pressure condenser 2；
Circulating water temperature is measured system and is included that six temperature points, the first temperature point 51 are arranged on the first circulating water line
On 11, being positioned at the upstream of low back pressure condenser 1, the second temperature point 52 is arranged on the second circulating water line 12, is positioned at the low back of the body
The upstream of pressure condenser 1, the 3rd temperature point 53 and the 4th temperature point 54 are arranged at the first of high back pressure condenser 2 downstream
On circulating water line 11, the 5th temperature point 55 and the 6th temperature point 56 are arranged at the second of high back pressure condenser 2 downstream and follow
In ring water lines 12.Owing to recirculated water return pipe exists thermal stratification phenomenon, calculate accuracy for improving, at the first circulating water pipe
Two temperature point the 3rd temperature points 53 and the 4th temperature point 54 are installed on road 11, the second circulating water line 12 is installed
Two temperature point the 5th temperature points 55 and the 6th temperature point 56.
First circulating water flow gauge the 61, second circulating water flow gauge the 62, the 3rd circulating water flow gauge the 63, the 4th circulating water flow
Gauge the 64, the 5th circulating water flow gauge 65 and the 6th circulating water flow gauge 66 all select ultrasonic flowmeter.
Also include that gas flow measurement system, gas flow measurement system include being arranged on the first vacuum lead 21
First gas flowmeter 71 and volume the second gas flowmeter 72 being arranged on the second vacuum lead 22.First gas flowmeter
71 and the second flow signal W of gas flowmeter 727、W8It is mainly used in monitoring water ring vacuum pump suction capactity situation of change, works as stream
Amount signal W7、W8When numerical value significantly reduces, show that water ring vacuum pump suction capactity substantially reduces.Meanwhile, circulating water refrigeration system 9
Opening forward and backward, water ring vacuum pump suction capactity changes, corresponding vacuum pump gas flow change, namely ON cycle water refrigeration is
After system 9, water ring vacuum pump recovers suction capactity, and vacuum lead gas flow rises, thus can be by being arranged on evacuation
The first gas flowmeter 71 and the flow signal W of the second gas flowmeter 72 on pipeline7、W8, monitor Water-ring vacuum pumping energy
Power state, provides meaning for running operation.
First gas flowmeter 71 and the second gas flowmeter 72 all select Ultrasonic Wave Flowmeter.
Embodiment 2
A kind of optimizing operation method of water ring vacuum pump monitor control system, its step is as follows:
Step one, DCS control terminal 8 and gather flow information and calculate condenser circulating water flow WT
Wherein W1、W2、W3、W4、W5And W6It is first circulating water flow gauge the 61, second circulating water flow gauge the 62, the 3rd respectively
Circulating water flow gauge the 63, the 4th circulating water flow gauge the 64, the 5th circulating water flow gauge 65 and the 6th circulating water flow gauge 66 gather
Data on flows；
Step 2, DCS control terminal 8 collecting temperature information and calculate condenser recirculated water inflow temperature tw1Follow with condenser
Ring water leaving water temperature tw2,
Wherein, t1、t2、t3、t4、t5、t6It is first temperature point the 51, second temperature point the 52, the 3rd temperature point respectively
53, the temperature data that the 4th temperature point the 54, the 5th temperature point 55 and the 6th temperature point 56 gather；
Step 3, the calculating basic Coefficient K of HEIHEI
In formula, each symbolic significance is as follows:
KHEI: the basic heat transfer coefficient of HEI, W/m^2 DEG C
Cd: cooling tube external diameter coefficient
V: flow velocity within cooling tubes, m/s
βt: cooling tube water temperature correction factor
βm: cooling tube material and wall thickness correction factor
In formula (4), cooling tube external diameter coefficient Cd, it can be according to table 1 value
Table 1
In formula (4), cooling tube material and wall thickness correction factor βmIt can be according to table 2 value
Table 2
In formula (4), βtCooling tube water temperature correction factor 3 cooling tube water temperature correction coefficient curves figures with reference to the accompanying drawings determine
Flow velocity within cooling tubes v is calculated as follows:
In formula, each symbolic significance is as follows:
V: mean flow rate in cooling tube, m/s
N: cooling tube quantity
Z: flow process, double pressure condenser takes 1
Do: cooling tube external diameter, mm
δ: cooling tube wall thickness, mm
ρ: cooling water density, kg/m^3；
Step 4, the overall heat-transfer coefficient making condenser are 0.85KHEI, calculate theoretical condenser saturation temperature t accordinglys
In formula, each symbolic significance is as follows:
ts: theoretical condenser saturation temperature, DEG C
The effective heat transfer area of A: condenser, m^2
QCond: condenser duty, kJ/s
Wherein condenser duty QCondCalculated by formula (7) and formula (8).
QCond=Cp×WT× △ T formula (7)
△ T=tw2-tw1Formula (8)
In formula, each symbolic significance is as follows:
Cp: recirculated water specific heat capacity, take 4.18kJ/kg DEG C
△ T: recirculated water temperature rise, DEG C；
Step 5, the solidifying P of calculatingsAnd Ps0
According to IF-97 world steam formula, calculate theoretical condenser saturation temperature tsCorresponding theoretical condenser is satisfied
With pressure Ps, also according to IF-97 world steam formula, calculate initial condenser saturation temperature ts0Corresponding initial condensing
Device saturation pressure Ps0, wherein initial condenser saturation temperature ts0It is that the condenser before non-ON cycle water refrigeration system 9 is saturated
Temperature, its numerical value is read by steam-turbine unit DCS data；
Step 6, according to steam turbine producer provide condenser pressure to heat consumption rate fair curve calculate ηs0And ηs,
The condenser pressure that steam turbine producer provides is η=f (P) to heat consumption rate fair curve,
ηs0=f (Ps0)
ηs=f (Ps)
Wherein, ηs0It is that initial condenser pressure is to heat consumption rate correction factor, ηsIt is that heat consumption rate is repaiied by theoretical condenser pressure
Positive coefficient,
Whether step 6, judgement recirculated water circulating water refrigeration system 9 are opened
In formula, each symbolic significance is as follows:
X: coefficient of determination
Heat: Design of Steam Turbine heat consumption rate, DEG C
Wqj: Steam Turbine power, kW
A: mark coal price lattice, unit/g
Wzlj: circulating water refrigeration system 9 runs power, kW
B: power plant rate for incorporation into the power network, unit/kWh
If it is determined that coefficient X >=1.2, DCS controls terminal 8 and sends open command to circulating water refrigeration system 9, and DCS controls eventually
End 8 control circulating water refrigeration system 9 is closed.
These are only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality
Any amendment, equivalent and the improvement etc. made within novel spirit and principle, should be included in guarantor of the present utility model
Within the scope of protecting.
Claims (4)
1. a water ring vacuum pump monitor control system, including high back pressure condenser, low back pressure condenser and circulating water line,
Circulating water line is divided into the first circulating water line and the second circulating water line, the first circulating water line and the second circulating water line equal
Flowing to high back pressure condenser from low back pressure condenser, low back pressure condenser passes through the first vacuum lead and the first water ring vacuum pump
Connecting, high back pressure condenser is connected by the second vacuum lead and the second water ring vacuum pump, it is characterised in that: described water ring is true
Empty pump monitor control system also includes that DCS controls terminal, circulating water flow measurement system, circulating water temperature measurement system and circulation
Water refrigeration system, described circulating water flow measurement system, circulating water temperature measure system and circulating water refrigeration system is all controlled with DCS
Terminal processed is electrically connected with；
Described circulating water flow measurement system includes the first circulating water flow gauge, the second circulating water flow gauge, the 3rd circulating water flow
Gauge, the 4th circulating water flow gauge, the 5th circulating water flow gauge and the 6th circulating water flow gauge；Described first circulating water flow
Meter, the second circulating water flow gauge and the 3rd circulating water flow gauge are arranged on the first circulating water line, the first circulating water flow gauge
The upstream of the back pressure condenser being positioned at, second gauge between low back pressure condenser and high back pressure condenser, the 3rd flow
Meter is positioned at the downstream of high back pressure condenser；Described 4th circulating water flow gauge, the 5th circulating water flow gauge and the 6th circulating water flow
Gauge is arranged on the second circulating water line, the upstream of the back pressure condenser that the 4th circulating water flow gauge is positioned at, the 5th effusion meter
Between low back pressure condenser and high back pressure condenser, the 6th effusion meter is positioned at the downstream of high back pressure condenser；
Described circulating water temperature is measured system and is included six temperature points, and the first temperature point is arranged on the first circulating water line
On, it being positioned at the upstream of low back pressure condenser, the second temperature point is arranged on the second circulating water line, is positioned at low back pressure condenser
Upstream, the 3rd temperature point and the 4th temperature point be arranged on first circulating water line in high back pressure condenser downstream,
Five temperature points and the 6th temperature point are arranged on second circulating water line in high back pressure condenser downstream.
2. a kind of water ring vacuum pump monitor control system, it is characterised in that: described first circulating water flow
Meter, the second circulating water flow gauge, the 3rd circulating water flow gauge, the 4th circulating water flow gauge, the 5th circulating water flow gauge and the 6th
Circulating water flow gauge all selects ultrasonic flowmeter.
3. a kind of water ring vacuum pump monitor control system, it is characterised in that: also include gas flow measurement
System, described gas flow measurement system includes the first gas flowmeter being arranged on the first vacuum lead and is arranged at the
Volume the second gas flowmeter on two vacuum leads.
4. a kind of water ring vacuum pump monitor control system, it is characterised in that: described first gas flowmeter
Ultrasonic Wave Flowmeter is all selected with the second gas flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620685128.0U CN205714775U (en) | 2016-06-30 | 2016-06-30 | A kind of water ring vacuum pump monitor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620685128.0U CN205714775U (en) | 2016-06-30 | 2016-06-30 | A kind of water ring vacuum pump monitor control system |
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| Publication Number | Publication Date |
|---|---|
| CN205714775U true CN205714775U (en) | 2016-11-23 |
Family
ID=57326818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620685128.0U Expired - Fee Related CN205714775U (en) | 2016-06-30 | 2016-06-30 | A kind of water ring vacuum pump monitor control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN205714775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971885A (en) * | 2016-06-30 | 2016-09-28 | 中国大唐集团科学技术研究院有限公司华东分公司 | Monitoring and controlling system for water ring vacuum pump and optimizing operating method |
| CN107559200A (en) * | 2017-11-01 | 2018-01-09 | 广东肯富来泵业股份有限公司 | Balanced type Roots vacuum pumping system and its control method |
-
2016
- 2016-06-30 CN CN201620685128.0U patent/CN205714775U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971885A (en) * | 2016-06-30 | 2016-09-28 | 中国大唐集团科学技术研究院有限公司华东分公司 | Monitoring and controlling system for water ring vacuum pump and optimizing operating method |
| CN107559200A (en) * | 2017-11-01 | 2018-01-09 | 广东肯富来泵业股份有限公司 | Balanced type Roots vacuum pumping system and its control method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20190630 |