JPS5946483A - Drain temperature control device for condenser - Google Patents

Abstract

PURPOSE:To save power required for operating a circulating water pump and to control the temperature difference between an inlet port and an outlet port for cooling water by a method wherein an optimum flow rate of the cooling water is estimated and a water inlet port and outlet port temperature difference feedback signal is used to correct the estimated flow rate when the estimation fails. CONSTITUTION:A correcting signal generator 104 receives as an input a difference epsilonT between a temperature difference DELTATa between the inlet port and the outlet port, and a temperature difference set value DELTATs and generates a correcting value BV1 for correcting the opening degree of a circulating water flow rate adjust value. An estimate signal generating section 105 receives as inputs a generator's effective electric power Go and the temperature difference DELTATa and after calculating a circulating water flow rate adjust valve opening degree estimate value BV6, outputs it to an adder 106. The adder 106 receives as inputs an estimate value BV2 and the correcting value BV1 and outputs a circulating water flow rate adjust valve opening degree correcting value BV3 to an operator 107. The operator 107 receives as inputs a command value BV3 and an adjust valve opening degree BVa1 and outputs a difference BVepsilon1. An adjuster 109 receives the difference BVepsilon1 as an input and generates a signal for driving a valve opening degree adjust motor 4A when the BVepsilon1 becomes zero so that the flow rate of the cooling water flowing through a circulating water flow rate adjust valve 3A is controlled.

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a drainage temperature control device for a first freezing device for plants such as nuclear reactors and thermal power reactors;7. Regarding. [Technical background of the invention] In nuclear power or thermal power generation,
A condenser 'utB will be installed along with the carp water equipment. Nuclear water equipment expands in a steam turbine and uses the steam that has done work to drain the water. This condensing equipment is used to reduce the exhaust pressure of the steam turbine and
Collect the J condensate and raise the reactor Rirui to 7+? The main purpose is to supply water to the steam turbine, but it also plays a role in creating a nice vacuum and increasing the exhaust pressure, thereby increasing the heat drop difference in the steam turbine and increasing the output and efficiency of the turbine. vinegar. In this way, the condensing equipment exchanges heat between the bottle exhaust gas and the cooling water, and seawater is generally used as the cooling water. The temperature of the cooling water that has undergone heat exchange in the water tank is higher than that of the nearby seawater, so if it is directly discharged into the sea, there will be a number of negative effects. Therefore, in the past, the temperature difference between the water intake temperature and the water outlet temperature was compared with a temperature difference set value, and the cooling water flow rate, that is, the circulating water flow layer of seawater, was controlled according to the difference. [Problems with back* technology] However, in this double water facility, condensate flows from the cooling water intake. : Because the pipe line leading to the drain is extremely long, even if the flow rate is controlled, it takes a long time for the temperature change to appear in one drain. Therefore, according to the conventional method, when the turbine displacement suddenly increases by Jl:1, il+! I Due to the delay in response due to the dead time of the wholesale system, the water inlet υd1 degree rises by 1 degree, and the temperature difference between the water intake and the drain is noticed by some people.
It will not be possible to keep it within the S limit. In order to prevent this, it is better to set the 01 activity difference set value to a small value in advance and keep it fixed at I, but in this case, the cooling water flow, j,
ft, that is, the circulating water bonder discharge θiL;・'', total 7L<low necessary cost will be increased by 1 i'c. this? r1)i
↓1ζ, 11ha''j, (Duck the water bottle to ν/
Temple'1b, power

[Office work (11j or more l shift, extra) 4, I changed the electricity to the thorns and the problems. [Object of the invention] The present invention eliminates the above conventional technique 11i7;
Use of circulating water pump by reducing fii '1lii yarn flow 1ljj I output!
11. The purpose is to reduce power consumption and provide a relatively small condenser with water humidity and temperature control for the conversion of ships. [Summary of the 13th Akira] Konodame, Honushiri' is the first book published from the condenser to the water outlet.
. In order to eliminate Odori no Muta ll4j IVJJ, : rt in the lb water tank: (Cooling water sucked into the father exchange / 1 < Preparation of escape amount is insufficient) ft-re 1, mutually, with the water intake 1) Temperature difference F of 1 water outlet
By using it to compensate when the cooling water is disconnected, the cooling water bonder is added with 1 HI, which is used for the circulating water bonder, and the temperature difference between the entrance and exit of the cooling water is controlled to a constant (111). [An evening of invention!, JM example] The present invention will be explained below with reference to the embodiment shown in Figure if+j. -Ability [Related to 11 cases・2 water fi+2 (+!i
Shows the cooling water system diagram of /C, and #I: is shown (r
ii: l: t1 to j are constructed from two lines A and B. Seawater Q at water intake 1 that becomes cooling water - Upper circulation J! Ij 7
Bump 2A, 2B and fit.
Benkai Ash 1iL4i %J 'fij Baillu 4A,,
Moti 1 where 4B Yosa 1 becomes 11 degrees h)ωWi+
3■ Effluent 6jGJ%j Proceed through the control valves 3A and 3B and enter the condenser water chamber 5A + 5B. Then, while the r1σ water moves in the direction indicated by the arrow of the cooling pipe group 'ff-actual condensation inside the condenser 6, it exchanges heat with the gas discharged from the cooling pipe 7. To return the fever/warm sea water d2, then turn on the ice maker outlet valve 8A. Published in Izuguchi 10 through 8B. Here, the condenser outlet valves 8A and 8B are 0N10FF valves operated by IH9.
A. 9B makes it fully open or fully closed. The temperature required to control the water intake temperature is detected by the water intake 11 installed near the water intake, and the protruding device 1 installed near the water intake. Warts are detected by the temperature detector 12 installed near the paper. Figure 2 shows the circulating water vIL bj'H;L'
1]j/1+valve 3A, 3]1 by controlling the opening degree of 1171J and cooling water γ7ifii]i flowing into the condenser for u, 1, the temperature can be kept at a constant [j(・1] This is a block diagram of the drainage temperature i1i!I control device 1・C to be stored in 14. In the figure, the same numerals as in the valley 1.1 figure indicate the same 111S,
Historically, 13 has a force detector in '1, 14 A, 14 B
&:j, 1 degree detector, 100 is 1lilJ control circuit. 101.1 in this Hi control rotation 100
02 is the addition and subtraction of shame, i 0311. L? +'+A degree difference foot device, 104d sleeve correction signal generator, 105 is pre-shrine signal generator, 106 is addition v:';s 107.108 is addition stage device, 109, 110 is control signal generator It is. 3 shows an internal block diagram of the predictive name generator 105 shown in FIG. 2, and 111 is Sensho'11. Force generator, 112 is differentiator, 113 is maximum J! , l-stream rat generator,
114 is a valve opening signal generator. With the above configuration, the calculator 101 calculates the intake water D tA Ii T 1 detected by the water intake temperature detector 11 and the drain if
, and the drain outlet temperature T2 detected by the leakage detector 12, and output the temperature difference ΔTa. Correction I5 @Creator]
04 is the actual temperature difference ΔTa and temperature difference setting 111↓Δ
The deviation εT from Ts is manually calculated and a circulating water flow jIi adjustment 1 valve opening correction value of 13V is output, but in order to avoid hunting, there is an insensitivity, and the deviation and εT are predetermined jl++
Dtj ring water flow control valve 1ji when exceeding lju
'1 degree correction value BY+ffi is output. On the other hand, the pre-jlJ signal generation unit 105 inputs the power generation active power GO detected by the power detector 13 and the temperature difference ΔTa output from the arithmetic unit 101, and calculates the cooling water θ flowing through the condenser 6.
A predicted value BV2f of the opening degree of the circulating water flow rate control valve such that II and tit are necessary and sufficient amounts is calculated and output to the adder 1υ6. The purpose of heat exchange performed in the condenser 6 is that the steam temperature exhausted from the steam turbine is constant, so it is proportional to the steam flow, and this steam blood flow is proportional to the active power G for power generation. do. Therefore, the cooling water flow rate Q required to keep the temperature difference ΔTa within a predetermined range is first related to the machine active power G, and can be determined from the function shown in FIG. On the other hand, if the dead time of the pipe from the circulating water flow control valve 3A13B to the condenser 6 is L seconds, the cooling water currently flowing through the condenser 6 is L seconds F + f, I is the circulating water flow i + 1 - control valve 3A.
, 3B, the cooling water flow is 1. 1.・Shitte, world, i'', from l, second i, 11 (3;
4.19jJ'+i4. Power I, I C1 side top, Stone I"
Me size 1 from 41Z1 151 section. L, -jru(1)61
j Mizukanka 1A Q,, Night J Me 1111 vrI
i,! ii water DiC, rt 1dol Dl'lbu 1ゝ3A, 3++ Noshi 11 exhibition j'iu L, ζ'11 people 11 water? If, 2" jri: 0+, i%i, zuyou ni suru 6.-1. % 1 fu one water seven t6 to 76 to 7 p4
The necessary cooling water flow j1; is set as θ11. 8th 11'
The solution is to cancel the dead time of r+. For this reason, prediction 113 publication 4'iB 105's Tsukuda Masa'
1. The silica generator 111 first inputs the force CO from the force generator 13, and lower BL: (
1) 8G・(more than 11 km) 1 effect'ton force GL /4
．． lI-exit 1. GL-ΔGoX L 10G (1[% J ・---・
-(]JHere, ΔGoil''i starts ~, ita'yo'
11 is the addition rate of force Ge+゛1', time T, (+
At time T2, Kaji'minutaura has kal'ton force GT > and former 'kame (class old man effect') at time T2 '1b force GT2, GT, -
G7['1 ΔGo ``''T2-'1.1 C%A low] -=-Azノ ノ ＃) can be requested. Magζ, this bii 3+- can be easily implemented in the Denotal city IJ 1iill system using the Microc0 processor. Furthermore, predictions? 1IIJ optimal cooling water Makoto ij: QL f7j
In order to increase the temperature, the differentiator 1121 is divided by the temperature travel ΔTa, and the effective 11°C force plot K (1 + 6 is input to the corrected value ΔG to the power generator 111. Add this 1[[Δ(I to Gr recorded earlier, GL'=GL+ΔG......
Output 3shi. Optimal υIt, j (7) The generator 113 outputs the optimum cooling water vij 'MQ r, based on the output Gl ml!, 1 number relationship shown in FIG. 1 degree 1h start time:: The cloud 114 calculates the circulating water θIL clause, W1ΔJ4j valve opening predetermined value 4(1) value BV2 from this optimum cooling water flow MQj, and outputs it to the adder 31 6. l 06 is this rrf ring water θ)L control valve Vi
Calculate 13V3 for circulating water flow plan required by J degree prediction value BV2 and the output of correction signal creation unit 104 [JIQ degree correction correction value UV input, circulating water flow Bt adjustment] output to 07, 1, and 08. Performance J1 device 107 is the circulating water flow rate control valve 1 no i'1 summer command value 13V3 and the circulating water flow i0i detected by the opening detector 14A: i valve opening BV
a1 is input, and the deviation BVε1 is output. Arithmetic unit 10
8 is the south ring water stream h

[Bj 17i) Validity command value BV3
and opening detector 1.4 B detects the circulating water flow rate ij! l
'J section valve opening IVa2 and '4 (- input ・11i:i
) Outputs the arm 13Vε2. 1i17N like 10! )ke; Sat・l1ui jX, :: 13Vε] manually, H
Valve 1jiJIDj 1iLlJ so that Vεl becomes lily
1'14jTl+,! II! 14'+5 (4A, I
L (mixed No. 18 to move, 1 (vεl or ia, t
J: Continue to generate drive No. 48 at the same time. Fl'r! 1 verse 11.0 is I! Input Ilj ＞X2B■ε2, B
■As ξ2 approaches, valve 1] "1 degree υ4j'ilj
'Ifi=! jj l戊4 A fノy4 BjJl
(, i month f 'JG born, BVε27,7i;
0) 1 river 31" degree i'7J 1. ! i city. , di17 down + 4A is the output of the control valve 3A for the control valve 3A, which is the output of the test j11) meeting 109. uL,
Korenyo 9 circulating water flow ji 1i111J]□f'+valve 3 A'q pii: Noshiru? Z water r no i *, tan is '+1j14111 a. Valve 1ji4 degree 1JAI
fJili%! +11i24B is il・la
a G l The drive which is the output of 10 (, shipped by F
f Rewater flow M (tsLn j'4j valve 3 B'r: +
# II) And this is the reason why the water vic: bj 8+
S mi valve 3 B is 1lilJ
:1 ill. In this way, an increase in the flow rate of turbine exhaust steam, which causes an increase in the temperature at the drain outlet, and a reduction in the dead time of the active power for power generation, compared to the cooling The water flow will increase in advance of 1L, 1ijl
It is possible to reduce the influence of the dead time of the J ial system and keep the temperature difference of the cooling water drained within a predetermined range by supplying the minimum amount of water flow fleas required for the bean paste. ．．
! When the water pump is moved to 'ii1', the force can be reduced to one dog chant. In addition, in the above example, the correction information generator] Output and performance (vessel 107゜1
The circulating water flow rate jvlj valve opening signal is used as the input for 08, or the cooling water υ1i)lii information may be used in its place. However, the turbine main steam flow may be used instead of the active power of the F-fail machine. Historically, the cooling water flow n・'1rlJ'< 升IjiJdegreetJ
'd 11) 'fir, 1ilJ ('ji 4
A + 4B, (+ white powder water flow jt4', ti' addition valve 3A, 3B) This can also be carried out by using a movable blade circulation bomb 0 with a flow rate of t-1°Aσ1i transmission. [Effect of the invention] As mentioned above, the book (', according to Akira, 1lill 1j
11 of the 41 system - Considering the effects of this time and dead time, obtain a prediction signal using ωin- that will make the cooling water flow rate θ1 and 11, and before a change in temperature and reaction occurs. Water control temperature
In order to perform ii control, there is a delay in coordination, A'tli degree,
In addition, circulating water can be used to save 12 liters of power, and the drain temperature of the water dispenser can be reduced to 11 □ 1 liters.

[Brief explanation of the drawing]

No. 11', J, and I are silver water devices j1 according to an embodiment of the present invention.
．． of? 1) The drainage system [';〈], ff'; 21g] is the drainage +7, +i J foot in Figure 1? ii! I (if 5
Figure 3 is the Ia 1 composition diagram of the 71i1 Hakugo generator shown in Figure 2, and Figure 4 is the Hikari '1'L'J 'l>'-
``!This is a relationship diagram between the effective force and J1) Burning water UI, i3i. 1... Water intake, 2 A, 213... Sanitary and waste water, J
5 pump, 3 A 13B...1 no 11 ring water υf j,
lf' li1 Old '4' valve, 4A, 4B...Valve opening j distance ii' 1 Power saving XUIJ 4; Me, 5 A r 5 B
... Condenser water chamber, 6... Condenser, 7... Natural air turbine, 1 (A, 8B... Condensate Masuda L1 valve, 9 A,
9 B = 4# production equipment, 10-... drainage ['', 11...
Water intake temperature detector, 12...v1゛water intake temperature calculator,
13...Power detector, 14A, 14B...Opening degree 7:
,,) output device, 100... control circuit, 101, 102,
107, 108...Addition/subtraction calculator, 103...Temperature difference setting device, 104...Pail positive signal generator, 105...Pre-d
ll signal generator, 106... booster, 109, 110
...al'A j11j device, 111...correction'i1
i, force generator, 112...differentiator, 113...le flow fence generator, 114...valve opening degree signal generator; Agent Patent Attorney Crest 1) Seiden, Envy 7 Figure 2

Claims (1)

[Claims] (]) In a device for controlling the temperature of the drain water of a condenser by adjusting the flow rate of cooling water flowing into the condenser, there is provided a cooling water intake temperature detection signal and a Jj+ water inlet temperature detection signal. a calculation means that inputs a signal and calculates the temperature difference, and inputs the temperature difference and the generator power or condenser steam flow rate, and calculates the optimum flow rate of cooling water required for PJA father exchange in the water heater. Preliminary i
and a correction signal generation means for outputting a correction signal when the temperature difference exceeds a predetermined range, the predicted signal generation means and the correction signal generation means; Adjust the cooling water flow rate according to the output sum of 1'
A condenser wastewater temperature control device that has nine characteristics: (2)ir! i = Scope of Claims In the first aspect of the invention, the prediction signal generating means inputs the generator power or the condenser steam flow rate, and calculates the generator power or the condenser steam flow rate ahead by a time corresponding to the dead time of the control system. Predicting water vapor flow rate 3'
> The value was further imitated by the previous t112 temperature 1'''tJ11
：Means for correcting with + and corresponding to this correction output→
〉L Optimum I'Jii of the cold water required for heat exchange with the separate air flow rate, and the function generation means that generates the entire amount.
9. Condenser drainage temperature 1li with r sign
lJ 'l'flll installation fi'1:.