CN108844399A - A kind of condenser ball cleaning based on DCS is from start and stop method - Google Patents
A kind of condenser ball cleaning based on DCS is from start and stop method Download PDFInfo
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- CN108844399A CN108844399A CN201810783491.XA CN201810783491A CN108844399A CN 108844399 A CN108844399 A CN 108844399A CN 201810783491 A CN201810783491 A CN 201810783491A CN 108844399 A CN108844399 A CN 108844399A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
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Abstract
The present invention provides a kind of, and the condenser ball based on DCS is cleaned from start and stop method, including presetting condenser circulating water cleanliness factor in dcs, acquire condenser floor data, utilize the condenser floor data of acquisition, the practical cleanliness factor in condenser circulating water side is calculated by DCS configuration, relatively more default cleanliness factor μ0With practical cleanliness factor μ, sends the unlatching/of control signal or stop rubber ball cleaning system.The present invention is controlled by DCS, it can be achieved with the distant place start and stop of condenser circulating water A, B side rubber ball cleaning system from existing system flow, invest small, execution conditions are easy to accomplish, can grasp the information such as cooling water flow, flow velocity, pressure, the temperature of condenser chamber in real time.
Description
Technical field
The invention belongs to cooling water technical fields, and in particular to a kind of condenser ball cleaning based on DCS is from start and stop side
Method.
Background technique
Condenser is the large-scale heat exchange equipment of the industries such as electric power, pharmacy, chemical industry, and the height of heat exchange performance directly affects
To the utilization rate of the energy, it is related to the energy-saving and emission-reduction of factory.Since the condenser that industrial circle uses generallys use water-cooling pattern,
The natural water source for being directly derived from rivers and lakes is not clean, causes copper pipe inner wall to gather with chemical reaction when heat exchange in addition
Some dirts for being unfavorable for heat transfer, so that the heat-transfer capability of condenser heat-transfer surface declines to a great extent, so that turbine efficiency drops
It is low.Therefore, it is necessary to periodically be cleaned to condenser.
Ball cleaning apparatus is the equipment that Turbo-generator Set in operation effectively cleans Cooling Tubes of Condenser, by
The components such as ball screen, glueballs delivery pump, ball collector, controller, glueballs and circulation line composition.Ball cleaning apparatus is periodically
Cooling tube is squeezed through with the cleaning glueballs that high pressure water will be greater than Cooling Tubes of Condenser internal diameter, cooling tube is cleaned repeatedly, is cleaned
Dirt and impurity is taken out of in Cooling Tubes of Condenser.Extend cooling tube service life, raising power plant economy effect so as to reach
Benefit, the purpose for ensureing equipment safety operation.The quality of the device service performance directly influences the clean-up performance and biography of condenser
The thermal efficiency is to improve economy of power plant, ensures that condenser is safely operated indispensable equipment.Rubber ball cleaning dress common at present
It is primary by operation order Manual-cleaning on the spot to set operation daily, it is 30-60 minutes each, manual operation is needed to start or stop glueballs
Cleaning device is unable to satisfy the mission requirements that condenser remotely monitors, and cannot be directly monitored by the effect of rubber ball cleaning.
Summary of the invention
To solve in the prior art, ball cleaning apparatus needs manually start and stop, and are unable to satisfy condenser and remotely supervise
The problem of surveying and rubber ball cleaning effect can not be directly monitored by, the condenser ball cleaning based on DCS that the present invention provides a kind of
From start and stop method.
To achieve the above object, the present invention uses following technical scheme：
A kind of condenser ball based on DCS is cleaned from start and stop method, is included the following steps：
(1) condenser circulating water cleanliness factor μ is preset in dcs0；
(2) condenser floor data is acquired；
(3) using the condenser floor data of step (2) acquisition, condenser circulating water side reality is calculated by DCS configuration
Border cleanliness factor μ；
(4) the default cleanliness factor μ of comparison step (1)0With the practical cleanliness factor μ of step (3), sends control signal and open
Open/or stopping rubber ball cleaning system.
Preferably, default condenser circulating water cleanliness factor μ described in step (1)0It is default clear including condenser A side water chamber
Clean coefficient μaCleanliness factor μ is preset with condenser B side water chamberb, the practical cleanliness factor μ of step (4) includes the practical cleaning of the side A water chamber
Coefficient μ1With the side the condenser B practical cleanliness factor μ of water chamber2。
Preferably, in the step (2), before acquiring condenser floor data, condenser needs steady load to run more than
10min and/or unit load fluctuation are less than 5MW.
Preferably, step (2) the condenser floor data includes high pressure superheated steam flow q1, middle pressure flow of superheated steam
Measure q2, low-pressure superheated steam flow q3, condenser pressure p1, the side condenser circulating water A inflow temperature ta1, the side condenser circulating water A
Leaving water temperature ta2, the side condenser circulating water B inflow temperature tb1With the side condenser circulating water B leaving water temperature tb2Data.
It is further preferred that the condition of step (4) unlatching/or stopping rubber ball cleaning system includes：
Work as μ1< μaWhen, start the side A rubber ball system, μ1=μaWhen, stop the side A rubber ball system；
Work as μ2< μbWhen, start the side B rubber ball system, μ2=μbWhen, stop the side B rubber ball system.
Preferably, step (4) condition for stopping rubber ball cleaning system includes：Scavenging period is set, starting glueballs is clear
Stop after washing after system the scavenging period for running setting.
Preferably, step (4) condition for stopping rubber ball cleaning system includes：After starting rubber ball cleaning system, manually
Stop rubber ball cleaning system operation.
It is further preferred that the calculating process that step (3) the DCS configuration calculates includes：
According to condenser pressure p1Seek saturation temperature tsaFitting formula：
According to saturation temperature tsaSeek saturated vapor specific enthalpy hs1Fitting formula:
hR1=3.4711033 × 103-1.7305388×104×u1+9.7790853×104×u1 2-2.4659887×
105×u1 3+3.1183497×105×u1 4-1.6409925×105×u1 5 (3)
According to condenser pressure p1Seek saturated water specific enthalpy hw1Fitting formula:
u2=p1 0.125(4)
hw1=-187.84245+760.75728 × u2-1637.9149×u2 2+2653.5223×u2 3-2575.211×
u2 4+1500.939×u2 5-480.62572×u2 6+65.565467×u2 7 (5)
By design low pressure (LP) cylinder exhaust steam moisture 5.1%, low pressure (LP) cylinder specific enthalpy of exhaust steam h can be acquired1：
h1=(1-5.1%) × hs1+hw1× 5.1% (6)
Ideally, without heat exchange, (this is to allow completely for engineering calculation between condenser and ambient atmosphere
), according to heat transfer theory, arranging its heat balance equation is：
Q=Dp×(h1-hw1)=k × A × Δ tm=q × cw×(t2-t1)(7)
Q=Dp×(h1-hw1)=(q1+q2+q3)×(h1-hw1) (8)
Formula (7), (8), (9), Q is condenser duty, W in (10)；Dp is turbine low pressure cylinder exhaust steam flow, for it is high,
In, the sum of low-pressure superheated steam flow, kg/s；h1For turbine low pressure cylinder specific enthalpy of exhaust steam, kJ/kg；hw1For condensed water specific enthalpy,
kJ/kg；K is the practical heat transfer coefficient of condenser, w/ (m2·℃)；△ tm is logarithmic mean temperature difference (LMTD), DEG C；A is condenser cooling surface
Product, m2；Q is condenser circulating water flow, ks/s；Cw is condenser circulating water specific heat capacity, and model takes 4.187kJ/ (kg DEG C)；
t2For condenser circulating water leaving water temperature, DEG C；t1For condenser circulating water inflow temperature, DEG C；tsaFor turbine low pressure cylinder steam discharge
Temperature, model is according to condenser pressure p1Saturation temperature is calculated, DEG C.
The side condenser A, B two sides recirculated water heat is equal (as 0.5Q), according to the side condenser A, B formula (7) thermal balance side
Formula can acquire the side condenser A circulating water flow q respectivelya1, the side condenser B circulating water flow qa2：
In order to reduce recirculated water inflow temperature error, using the side condenser A recirculated water inflow temperature ta1, the side condenser B follows
Ring water inflow temperature tb1The average value of the two is as recirculated water inflow temperature t1：
t1=(ta1+tb1)×0.5 (13)
The side condenser A logarithmic mean temperature difference (LMTD) △ t can be acquired according to formula (10)ma：
The side condenser B logarithmic mean temperature difference (LMTD) △ t can be acquired according to formula (10)mb：
The two sides condenser A, B condenser cooling surface A is equal, and looking into Condenser Design parameter has the condenser cooling surface to be
10340m2, i.e.,：
A=10340 ÷ 2=5170m2,
The two sides condenser A, B heat transfer coefficient k is acquired by formula (9) respectively1、k2：
When carrying out condenser thermodynamic computing, condenser heat transfer coefficient k is the warp by being obtained according to experiment and theory analysis
Formula is tested to be calculated.Usually used calculation formula is：Φ
K=14650 μ φwφtφzφd (18)
Formula (18), (19), (20), in (21), μ is condenser circulating water side cleanliness factor；Φ w is cooling water flow velocity and pipe
The correction factor of diameter；Cw is flow velocity of the cooling water in cooling tube, m/s；d1For condenser cooling water bore, looks into condenser and set
It is 28.575 × 0.7mm that meter parameter, which has condenser cooling water pipe size and wall thickness, i.e. internal diameter is：
d1=28.575-0.7=27.875mm (22)
Φ t is cold in-water temperature correction factor；Φ z is the correction factor of cooling water flow path number Z；Φ d is condenser
Unit area steam load dcCorrection factor, the quantity of steam condensed in the unit time on unit area, referred to as unit heat are negative
Lotus, looking into Condenser Design parameter to have condenser cooling surface is 10340m2, i.e.,：
Condenser unit area steam load design value：
Dp is turbine low pressure cylinder exhaust steam flow in formula (22), (23), and Dc is turbine low pressure cylinder exhaust steam flow design value.
Condenser unit area steam load critical value：
WhenWhen, it is not required to correct, i.e.,：
Φd=1 (26)
WhenWhen, it need to be modified, i.e.,：
Φd=δ (2- δ) (27)
The design two sides condenser A, B circulating water flow is equal, then single-sided design circulating water flow is
24400 ÷ 2=12200t/h,
Design current velocity is 2.25m/s, then can acquire condensing respectively according to identical caliber circulating water flow is directly proportional to flow velocity
The two sides device A, B recirculated water flow velocity is respectively：
Assuming that condenser circulating water A, B two sides cleanliness factor is respectively：μ1、μ2, then formula (22), (29), (30) are substituted into formula
(19) correction factor of the two sides condenser A, B cooling water flow velocity and caliber is acquired respectively：
The two sides condenser A, B recirculated water inflow temperature correction factor can be acquired respectively by formula (20) is：
Looking into Condenser Design parameter has cooling water flow path number Z=2, can acquire cooling water flow path correction factor by formula (21)
For：
The two sides condenser A, B thermic load, film-cooled heat are equal in engineering calculation, then the two sides condenser A, B unit area steams
The correction factor Φ d of vapour load dc is equal, can acquire the two sides condenser A, B unit area steam load dc by formula (23)~(28)
Correction factor Φ d.
Beneficial effects of the present invention
1, it is controlled by DCS, can be achieved with condenser circulating water A, B side rubber ball cleaning system from existing system flow
Distant place start and stop, investment is small, and execution conditions are easy to accomplish；
2, according to the condenser circulating water side online computation model of cleanliness factor calculated in DCS configuration condenser circulating water A,
The side B cleanliness factor automatically controls condenser according to condenser circulating water A, the B side cleanliness factor distant place DCS of setting by logic
The side recirculated water A, B rubber ball cleaning, realizes monitoring condenser circulating water A, B side rubber ball cleaning effect and the distant place DCS automatically controls
The purpose of condenser circulation A, the side B rubber ball cleaning；
3, the information such as cooling water flow, flow velocity, pressure, the temperature of condenser chamber can be grasped in real time.
Detailed description of the invention
Fig. 1 is condenser circulation rubber ball cleaning system schematic diagram.
Fig. 2 is condenser circulating water cleanliness factor rubber ball cleaning DCS logical schematic, wherein：W is unit load, unit
MW；q1For high pressure superheated steam flow, unit t/h；q2For middle pressure superheat steam flow, unit t/h；q3For low-pressure superheated steam
Flow, unit t/h；p1For condenser pressure, unit kPa；ta1For the side condenser circulating water A inflow temperature, unit DEG C；ta2It is solidifying
The side vapour device recirculated water A leaving water temperature, unit DEG C；tb1For the side condenser circulating water B inflow temperature, unit DEG C；tb2It is followed for condenser
The side ring water B leaving water temperature, unit DEG C.
Fig. 3 is the start/stop process schematic of rubber ball system.
Specific embodiment
The following is specific embodiments of the present invention, and is described with reference to the drawings and further retouches to technical solution of the present invention work
It states, however, the present invention is not limited to these examples.
Embodiment 1
A kind of condenser ball based on DCS is cleaned from start and stop method, is included the following steps：
(1) condenser A side water chamber is preset in dcs preset cleanliness factor μaCleanliness factor is preset with condenser B side water chamber
μb；
(2) condenser floor data is acquired, including：High pressure superheated steam flow q1, middle pressure superheat steam flow q2, low pressure
Superheat steam flow q3, condenser pressure p1, condenser circulating water A side inflow temperature ta1, the side condenser circulating water A go out water temperature
Spend ta2, the side condenser circulating water B inflow temperature tb1 and the side condenser circulating water B leaving water temperature tb2 data；
(3) using the condenser floor data of step (2) acquisition, the side condenser circulating water A water is calculated by DCS configuration
The practical cleanliness factor μ in room1With the side the condenser B practical cleanliness factor μ of water chamber2；
(4) the practical cleanliness factor of the default cleanliness factor of comparison step (1) and step (3)：
Work as μ1<μaWhen, start the side A rubber ball system, μ1=μaWhen, stop the side A rubber ball system；
Work as μ2<μbWhen, start the side B rubber ball system, μ2=μbWhen, stop the side B rubber ball system.
Specifically, the start/stop mode of rubber ball system is：
Rubber ball system receives enabling signal, and ball screen is closed, and ball collector outlet electric valve is opened, ball collector entrance motor-driven valve
Open, start Rubber ball pump, be stored in air accumulator compressed air moment injection service robot in, the glueballs in ball collector emit into
Condenser recirculated cooling water water inlet pipe, glueballs starts clean to cooling tube and timing, and glueballs is completed to carry out cooling tube clear
After washing, μ1=μaWhen and/or μ2=μbWhen, glueballs room executing agency is closed, ball collector inlet valve is closed, and Rubber ball pump is stopped, and fills ball
Room outlet valve is closed, and ball screen is opened, and glueballs returns to ball screen, terminates a cleaning process.Fig. 1 is that condenser circulation glueballs is clear
System schematic is washed, Fig. 2 is condenser circulating water cleanliness factor rubber ball cleaning DCS logical schematic, wherein：W is unit load, single
Position MW；q1For high pressure superheated steam flow, unit t/h；q2For middle pressure superheat steam flow, unit t/h；q3For low area overheat steaming
Steam flow amount, unit t/h；p1For condenser pressure, unit kPa；ta1For the side condenser circulating water A inflow temperature, unit DEG C；ta2For
The side condenser circulating water A leaving water temperature, unit DEG C；tb1For the side condenser circulating water B inflow temperature, unit DEG C；tb2For condenser
The side recirculated water B leaving water temperature, unit DEG C.Table 1 show Condenser Design parameter.
1 Condenser Design parameter of table
| Title | Unit | Design value |
| Thermic load | kJ/h | 810.5×106 |
| Heat transfer coefficient | kJ/(h.m2/℃) | 13270.4 |
| Quantity of circulating water | m3/h | 24400 |
| Circulating water intake temperature | ℃ | 29.4 |
| Cleaning gene | % | 90 |
| Water flow velocity in pipeline | m/s | 2.25 |
| Effective gross area of pipeline | m2 | 10340 |
| Size and wall thickness | mm | 28.575×0.7 |
| Process | 2 | |
| Low pressure (LP) cylinder exhaust steam flow | t/h | 352.4 |
| Low pressure (LP) cylinder exhaust steam moisture | % | 5.1 |
The calculating process of DCS configuration calculating includes in step (3)：
According to condenser pressure p1Seek saturation temperature tsaFitting formula：
According to saturation temperature tsaSeek saturated vapor specific enthalpy hs1Fitting formula:
hS1=3.4711033 × 103-1.7305388×104×u1+9.7790853×104×u1 2-2.4659887×
105×u1 3+3.1183497×105×u1 4-1.6409925×105×u1 5 (3)
According to condenser pressure p1Seek saturated water specific enthalpy hw1Fitting formula:
u2=p1 0.125 (4)
hW1=-187.84245+760.75728 × u2-1637.9149×u2 2+2653.5223×u2 3-2575.211×
u2 4+1500.939×u2 5-480.62572×u2 6+65.565467×u2 7 (5)
By design low pressure (LP) cylinder exhaust steam moisture 5.1%, low pressure (LP) cylinder specific enthalpy of exhaust steam h can be acquired1：
h1=(1-5.1%) × hs1+hw1× 5.1% (6)
Ideally, without heat exchange, (this is to allow completely for engineering calculation between condenser and ambient atmosphere
), according to heat transfer theory, arranging its heat balance equation is：
Q=Dp×(h1-hw1)=k × A × Δ tm=q × cw×(t2-t1) (7)
Q=Dp×(h1-hw1)=(q1+q2+q3)×(h1-hw1) (8)
Formula (7), (8), (9), Q is condenser duty, W in (10)；Dp is turbine low pressure cylinder exhaust steam flow, for it is high,
In, the sum of low-pressure superheated steam flow, kg/s；h1For turbine low pressure cylinder specific enthalpy of exhaust steam, kJ/kg；hw1For condensed water specific enthalpy,
kJ/kg；K is the practical heat transfer coefficient of condenser, w/ (m2·℃)；△ tm is logarithmic mean temperature difference (LMTD), DEG C；A is condenser cooling surface
Product, m2；Q is condenser circulating water flow, ks/s；Cw is condenser circulating water specific heat capacity, and model takes 4.187kJ/ (kg DEG C)；
t2For condenser circulating water leaving water temperature, DEG C；t1For condenser circulating water inflow temperature, DEG C；Tsa is turbine low pressure cylinder steam discharge
Temperature, model calculate saturation temperature according to condenser pressure p1, DEG C.The side condenser A, B two sides recirculated water heat is equal (as
0.5Q), according to the side condenser A, B formula (7) heat balance equation, the side condenser A circulating water flow q can be acquired respectivelya1, condenser
The side B circulating water flow qa2：
In order to reduce recirculated water inflow temperature error, using the side condenser A recirculated water inflow temperature ta1, the side condenser B follows
Ring water inflow temperature tb1The average value of the two is as recirculated water inflow temperature t1：
t1=(ta1+tb1)×0.5 (13)
The side condenser A logarithmic mean temperature difference (LMTD) △ t can be acquired according to formula (10)ma：
The side condenser B logarithmic mean temperature difference (LMTD) △ t can be acquired according to formula (10)mb：
The two sides condenser A, B condenser cooling surface A is equal, and looking into Condenser Design parameter has the condenser cooling surface to be
10340m2, i.e.,：
A=10340 ÷ 2=5170m2,
The two sides condenser A, B heat transfer coefficient k is acquired by formula (9) respectively1、k2：
When carrying out condenser thermodynamic computing, condenser heat transfer coefficient k is the warp by being obtained according to experiment and theory analysis
Formula is tested to be calculated.Usually used calculation formula is：Φ
K=14650 μ ΦwΦtΦzΦd (18)
Formula (18), (19), (20), in (21), μ is condenser circulating water side cleanliness factor；Φ w is cooling water flow velocity and pipe
The correction factor of diameter；Cw is flow velocity of the cooling water in cooling tube, m/s；D1 is condenser cooling water bore, looks into condenser and sets
It is 28.575 × 0.7mm that meter parameter, which has condenser cooling water pipe size and wall thickness, i.e. internal diameter is：
d1=28.575-0.7=27.875mm (22)
Φ t is cold in-water temperature correction factor；Φ z is the correction factor of cooling water flow path number Z；Φ d is condenser
The correction factor of unit area steam load dc, the quantity of steam condensed on unit area in the unit time, referred to as unit heat are negative
Lotus, looking into Condenser Design parameter to have condenser cooling surface is 10340m2, i.e.,：
Condenser unit area steam load design value：
Dp is turbine low pressure cylinder exhaust steam flow in formula (22), (23), and Dc is turbine low pressure cylinder exhaust steam flow design value.
Condenser unit area steam load critical value：
WhenWhen, it is not required to correct, i.e.,：
Φd=1 (26)
WhenWhen, it need to be modified, i.e.,：
Φd=δ (2- δ) (27)
The design two sides condenser A, B circulating water flow is equal, then single-sided design circulating water flow is
24400 ÷ 2=12200t/h,
Design current velocity is 2.25m/s, then can acquire condensing respectively according to identical caliber circulating water flow is directly proportional to flow velocity
The two sides device A, B recirculated water flow velocity is respectively：
Assuming that condenser circulating water A, B two sides cleanliness factor is respectively：μ1、μ2, then formula (22), (29), (30) are substituted into formula
(19) correction factor of the two sides condenser A, B cooling water flow velocity and caliber is acquired respectively：
The two sides condenser A, B recirculated water inflow temperature correction factor can be acquired respectively by formula (20) is：
Looking into Condenser Design parameter has cooling water flow path number Z=2, can acquire cooling water flow path correction factor by formula (21)
For：
The two sides condenser A, B thermic load, film-cooled heat are equal in engineering calculation, then the two sides condenser A, B unit area steams
The correction factor Φ d of vapour load dc is equal, can acquire the two sides condenser A, B unit area steam load dc by formula (23)~(28)
Correction factor Φ d.
Embodiment 2
A kind of condenser ball based on DCS is cleaned from start and stop method, is included the following steps：
(1) condenser A side water chamber is preset in dcs preset cleanliness factor μaCleanliness factor is preset with condenser B side water chamber
μb；
(2) condenser floor data is acquired, including：High pressure superheated steam flow q1, middle pressure superheat steam flow q2, low pressure
Superheat steam flow q3, condenser pressure p1, condenser circulating water A side inflow temperature ta1, the side condenser circulating water A go out water temperature
Spend ta2, the side condenser circulating water B inflow temperature tb1 and the side condenser circulating water B leaving water temperature tb2 data；
(3) using the condenser floor data of step (2) acquisition, the side condenser circulating water A water is calculated by DCS configuration
The practical cleanliness factor μ in room1With the side the condenser B practical cleanliness factor μ of water chamber2；
(4) the practical cleanliness factor of the default cleanliness factor of comparison step (1) and step (3)：
Work as μ1<μaWhen, start the side A rubber ball system, μ1=μaWhen, stop the side A rubber ball system；
Work as μ2<μbWhen, start the side B rubber ball system, μ2=μbWhen, stop the side B rubber ball system.
Specifically, the start/stop mode of rubber ball system is：
Rubber ball system receives enabling signal, and ball screen is closed, and ball collector outlet electric valve is opened, ball collector entrance motor-driven valve
Open, start Rubber ball pump, be stored in air accumulator compressed air moment injection service robot in, the glueballs in ball collector emit into
Condenser recirculated cooling water water inlet pipe, glueballs starts clean to cooling tube and timing, when cleaning the extremely time of setting, closes
Glueballs room executing agency, ball collector inlet valve are closed, and Rubber ball pump is stopped, and ball collector outlet valve is closed, and ball screen is opened, and glueballs returns
To ball screen, terminate a cleaning process.
The calculating process that DCS configuration calculates in step (3) is same as Example 1.
Embodiment 3
A kind of condenser ball based on DCS is cleaned from start and stop method, is included the following steps：
(1) condenser A side water chamber is preset in dcs preset cleanliness factor μaCleanliness factor is preset with condenser B side water chamber
μb；
(2) when condenser needs steady load to run more than 10min and/or unit load fluctuation less than 5MW, condenser is acquired
Floor data, including：High pressure superheated steam flow q1, middle pressure superheat steam flow q2, low-pressure superheated steam flow q3, condenser
Pressure p 1, the side condenser circulating water A inflow temperature ta1, condenser circulating water A side leaving water temperature ta2, the side condenser circulating water B
Inflow temperature tb1 and the side condenser circulating water B leaving water temperature tb2 data；
(3) using the condenser floor data of step (2) acquisition, the side condenser circulating water A water is calculated by DCS configuration
The practical cleanliness factor μ in room1With the side the condenser B practical cleanliness factor μ of water chamber2；
(4) the practical cleanliness factor of the default cleanliness factor of comparison step (1) and step (3)：
Work as μ1<μaWhen, start the side A rubber ball system, μ1=μaWhen, stop the side A rubber ball system；
Work as μ2<μbWhen, start the side B rubber ball system, μ2=μbWhen, stop the side B rubber ball system.
Specifically, the start/stop mode of rubber ball system is：
Rubber ball system receives enabling signal, and ball screen is closed, and ball collector outlet electric valve is opened, ball collector entrance motor-driven valve
Open, start Rubber ball pump, be stored in air accumulator compressed air moment injection service robot in, the glueballs in ball collector emit into
Condenser recirculated cooling water water inlet pipe, glueballs starts clean to cooling tube and timing, when cleaning the extremely time of setting, closes
Glueballs room executing agency, ball collector inlet valve are closed, and Rubber ball pump is stopped, and ball collector outlet valve is closed, and ball screen is opened, and glueballs returns
To ball screen, terminate a cleaning process.Fig. 3 is the start/stop process schematic of rubber ball system.
The calculating process that DCS configuration calculates in step (3) is same as Example 1.
Claims (8)
1. a kind of condenser ball based on DCS is cleaned from start and stop method, which is characterized in that include the following steps：
(1) condenser circulating water cleanliness factor μ is preset in dcs0；
(2) condenser floor data is acquired；
(3) using the condenser floor data of step (2) acquisition, it is actually clear that condenser circulating water side is calculated by DCS configuration
Clean coefficient μ；
(4) the default cleanliness factor μ of comparison step (1)0With the practical cleanliness factor μ of step (3), send control signal open/or
Stop rubber ball cleaning system.
2. the condenser ball based on DCS is cleaned from start and stop method according to claim 1, which is characterized in that step (1) institute
The default condenser circulating water cleanliness factor μ stated0Cleanliness factor μ is preset including condenser A side water chamberaIt is pre- with the side condenser B water chamber
If cleanliness factor μb, step (4) the practical cleanliness factor μ includes the practical cleanliness factor μ of the side A water chamber1With the side condenser B water chamber
Practical cleanliness factor μ2。
3. the condenser ball based on DCS is cleaned from start and stop method according to claim 1, which is characterized in that the step
(2) in, acquire condenser floor data before, condenser need steady load run more than 10min and/or unit load fluctuation be less than
5MW。
4. the condenser ball based on DCS is cleaned from start and stop method according to claim 1, which is characterized in that step (2) institute
Stating condenser floor data includes high pressure superheated steam flow q1, middle pressure superheat steam flow q2, low-pressure superheated steam flow q3,
Condenser pressure p1, the side condenser circulating water A inflow temperature ta1, the side condenser circulating water A leaving water temperature ta2, condenser circulating water
The side B inflow temperature tb1With the side condenser circulating water B leaving water temperature tb2Data.
5. the condenser ball based on DCS is cleaned from start and stop method according to claim 2, which is characterized in that step (4) institute
State unlatching/or stop rubber ball cleaning system condition include：
Work as μ1<μaWhen, start the side A rubber ball system, μ1=μaWhen, stop the side A rubber ball system；
Work as μ2<μbWhen, start the side B rubber ball system, μ2=μbWhen, stop the side B rubber ball system.
6. the condenser ball based on DCS is cleaned from start and stop method according to claim 1, which is characterized in that step (4) institute
State stop rubber ball cleaning system condition include：Scavenging period is set, after starting rubber ball cleaning system, the cleaning of operation to setting
Stop after time.
7. the condenser ball based on DCS is cleaned from start and stop method according to claim 1, which is characterized in that step (4) institute
State stop rubber ball cleaning system condition include：After starting rubber ball cleaning system, stop rubber ball cleaning system operation manually.
8. the condenser ball based on DCS is cleaned from start and stop method according to claim 2, which is characterized in that step (3) institute
Stating the calculating process that DCS configuration calculates includes：
According to condenser pressure p1Seek saturation temperature tsaFitting formula：
According to saturation temperature tsaSeek saturated vapor specific enthalpy hs1Fitting formula:
hs1=3.4711033 × 103-1.7305388×104×u1+9.7790853×104×u1 2-2.4659887×105×
u1 3+3.1183497×105×u1 4-1.6409925×105×u1 5 (3)
According to condenser pressure p1Seek saturated water specific enthalpy hw1Fitting formula:
u2=p1 0.125 (4)
hw1=-187.84245+760.75728 × u2-1637.9149×u2 2+2653.5223×u2 3-2575.211×u2 4+
1500.939×u2 5-480.62572×u2 6+65.565467×u2 7 (5)
By design low pressure (LP) cylinder exhaust steam moisture 5.1%, low pressure (LP) cylinder specific enthalpy of exhaust steam h can be acquired1：
h1=(1-5.1%) × hs1+hw1× 5.1% (6)
Ideally, between condenser and ambient atmosphere without heat exchange (this allows engineering calculation completely),
According to heat transfer theory, arranging its heat balance equation is：
Q=Dp×(h1-hw1)=k × A × Δ tm=q × cw×(t2-t1) (7)
Q=Dp×(h1-hw1)=(q1+q2+q3)×(h1-hw1) (8)
Formula (7), (8), (9), Q is condenser duty, W in (10)；Dp is turbine low pressure cylinder exhaust steam flow, is high, medium and low
Press the sum of superheat steam flow, kg/s；H1 is turbine low pressure cylinder specific enthalpy of exhaust steam, kJ/kg；Hw1 is condensed water specific enthalpy, kJ/kg；
K is the practical heat transfer coefficient of condenser, w/ (m2 DEG C)；△ tm is logarithmic mean temperature difference (LMTD), DEG C；A is condenser cooling surface, m2；q
For condenser circulating water flow, ks/s；Cw is condenser circulating water specific heat capacity, and model takes 4.187kJ/ (kg DEG C)；t2It is solidifying
Vapour device recirculated water leaving water temperature, DEG C；t1For condenser circulating water inflow temperature, DEG C；tsaFor turbine low pressure cylinder exhaust temperature, mould
Type is according to condenser pressure p1Saturation temperature is calculated, DEG C.
The side condenser A, B two sides recirculated water heat is equal (as 0.5Q), according to the side condenser A, B formula (7) heat balance equation,
The side condenser A circulating water flow q can be acquired respectivelya1, the side condenser B circulating water flow qa2：
In order to reduce recirculated water inflow temperature error, using the side condenser A recirculated water inflow temperature ta1, the side condenser B recirculated water
Inflow temperature tb1The average value of the two is as recirculated water inflow temperature t1：
t1=(ta1+tb1)×0.5 (13)
The side condenser A logarithmic mean temperature difference (LMTD) △ t can be acquired according to formula (10)ma：
The side condenser B logarithmic mean temperature difference (LMTD) △ t can be acquired according to formula (10)mb：
The two sides condenser A, B condenser cooling surface A is equal, and looking into Condenser Design parameter has the condenser cooling surface to be
10340m2, i.e.,：
A=10340 ÷ 2=5170m2,
The two sides condenser A, B heat transfer coefficient k is acquired by formula (9) respectively1、k2：
When carrying out condenser thermodynamic computing, condenser heat transfer coefficient k is public by the experience obtained according to experiment and theory analysis
Formula is calculated.Usually used calculation formula is：Φ
K=14650 μ ΦwΦtΦzΦd (18)
Formula (18), (19), (20), in (21), μ is condenser circulating water side cleanliness factor；Φ w is cooling water flow velocity and caliber
Correction factor；Cw is flow velocity of the cooling water in cooling tube, m/s；D1 is condenser cooling water bore, looks into Condenser Design ginseng
It is 28.575 × 0.7mm that number, which has condenser cooling water pipe size and wall thickness, i.e. internal diameter is：
d1=28.575-0.7=27.875mm (22)
Φ t is cold in-water temperature correction factor；Φ z is the correction factor of cooling water flow path number Z；Φ d is condenser unit
The correction factor of area steam load dc, the quantity of steam condensed on unit area in the unit time, referred to as unit thermic load, is looked into
It is 10340m that Condenser Design parameter, which has condenser cooling surface,2, i.e.,：
Condenser unit area steam load design value：
Dp is turbine low pressure cylinder exhaust steam flow in formula (22), (23), and Dc is turbine low pressure cylinder exhaust steam flow design value.
Condenser unit area steam load critical value：
WhenWhen, it is not required to correct, i.e.,：
Φd=1 (26)
WhenWhen, it need to be modified, i.e.,：
Φd=δ (2- δ) (27)
The design two sides condenser A, B circulating water flow is equal, then single-sided design circulating water flow is
24400 ÷ 2=12200t/h,
Design current velocity is 2.25m/s, then can acquire condenser A, B respectively according to identical caliber circulating water flow is directly proportional to flow velocity
Two sides recirculated water flow velocity is respectively：
Assuming that condenser circulating water A, B two sides cleanliness factor is respectively：μ1、μ2, then formula (22), (29), (30) are substituted into formula (19)
The correction factor of the two sides condenser A, B cooling water flow velocity and caliber is acquired respectively：
The two sides condenser A, B recirculated water inflow temperature correction factor can be acquired respectively by formula (20) is：
Looking into Condenser Design parameter has cooling water flow path number Z=2, can acquire cooling water flow path correction factor by formula (21) and be：
The two sides condenser A, B thermic load, film-cooled heat are equal in engineering calculation, then the two sides condenser A, B unit area steam is negative
The correction factor Φ d of lotus dc is equal, can acquire repairing for condenser A, B two sides unit area steam load dc by formula (23)~(28)
Positive coefficient Φ d.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580241A (en) * | 2018-12-07 | 2019-04-05 | 武汉钢铁集团鄂城钢铁有限责任公司 | A kind of quantitative analysis method of condenser pollution level |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202538410U (en) * | 2012-02-22 | 2012-11-21 | 海阳龙凤热电有限公司 | Automatic cleaning condenser |
| CN103335537A (en) * | 2013-06-15 | 2013-10-02 | 国家电网公司 | Method for on-line monitoring real-time operation cleanness factor of condenser |
| CN105181741A (en) * | 2015-10-26 | 2015-12-23 | 张伟 | Multi-pipeline cleanliness online detection device |
| CN105806147A (en) * | 2014-12-31 | 2016-07-27 | 国家电网公司 | Condenser rubber ball cleaning system for gas-fired thermal power plant and start and stop control method of condenser rubber ball cleaning system |
| CN107063734A (en) * | 2017-06-07 | 2017-08-18 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of condenser, condenser monitoring system, condenser power consumption analysis method |
-
2018
- 2018-07-17 CN CN201810783491.XA patent/CN108844399A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202538410U (en) * | 2012-02-22 | 2012-11-21 | 海阳龙凤热电有限公司 | Automatic cleaning condenser |
| CN103335537A (en) * | 2013-06-15 | 2013-10-02 | 国家电网公司 | Method for on-line monitoring real-time operation cleanness factor of condenser |
| CN105806147A (en) * | 2014-12-31 | 2016-07-27 | 国家电网公司 | Condenser rubber ball cleaning system for gas-fired thermal power plant and start and stop control method of condenser rubber ball cleaning system |
| CN105181741A (en) * | 2015-10-26 | 2015-12-23 | 张伟 | Multi-pipeline cleanliness online detection device |
| CN107063734A (en) * | 2017-06-07 | 2017-08-18 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of condenser, condenser monitoring system, condenser power consumption analysis method |
Non-Patent Citations (2)
| Title |
|---|
| 王建国、汪勇华: "凝汽器水侧清洁系数的在线计算", 《汽轮机技术》 * |
| 金国华: "凝汽器清洁特性的诊断", 《汽轮机技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580241A (en) * | 2018-12-07 | 2019-04-05 | 武汉钢铁集团鄂城钢铁有限责任公司 | A kind of quantitative analysis method of condenser pollution level |
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