DE1451141A1 - Condensate desalination device for high pressure steam power plants - Google Patents

Description

Siemens-Schuckertwerke Erlangen,

.nctiengesellehaft. “Vernor-Yon-Sieinens-Strasse

PLA 63/1774 1451 PLA 9/110/1002

Koödensatenfsalzungseinriehtung for Hoclidruckdanipf Kraftanlage »

High pressure steam power plant ©, especially those with through boilers, often contain a condensate desalination plant, which is capable of the entire aufzubereiter in the turbine condenser resulting Kondenuatmonge "* One e-rreicht Ma by one hand as quickly as possible cleaning of the circuit at -the first commissioning of the power plant, anctererseits "Let 'see remove all salts that can occur in the case of a leakage in the turbine condenser due to the ingress of cooling water *

The condensate desalsimga system is used in high pressure power plants

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Generally designed for an output of twice 50 'P of the amount of condensate that accumulates. When regenerating a "road, however, the output of the block must be reduced to half load" in order to avoid "malfunctions in the boiler and turbine in the event of a salt ingress , to avoid. In contrast, the invention makes it possible when salt penetrates the condensate that the Bloök can remain at the Metz with "its full power."

For larger Blaek units, the turbine condensers are normally divided "into two separate chambers" * The! Invention is based on the knowledge that "it is unlikely, that there are leaks in both condenser chambers at the same time ' According to the invention, a continuous conductivity solution will now occur made and when a "salt" burglary The condensate produced immediately in one of the chambers either by hand or automatIscli; about * those assigned to the chamber ' Bntsalzungr.strasse led. The hotwell of each condenser chamber is to this; Purpose by eijae -partition wall In'zwei tlnter-

The condensate that accumulates can be removed by attaching a deflector fade above one chamber only into the second chamber flow from it in the event of a; Jalzelnbruches via the condensate desalination plant is pressed into the first chamber »Off This Eamiser then flows * the desalinated condensate unnrlttelbRr via the main condensate pipes to the feed water tank. Is the salting straiie> that of the leaky candidate chamber is assigned * exhausted * so according to the invention is the accruing Overcleaned condensate automatically or by hand on the

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A street assigned to the veiten chamber switched. In the meantime, the first line is being regenerated * If there are two desalination lines, each with a condensate output of 50%, there is the possibility of maintaining the full turbine flow even in the event of malfunctions due to salt broth, provided that both condenser chambers do not leak at the same time. Another advantage is also .ier that the main condensate pump always in their best Leistun _t 2; can be driven sbereich ·

With the help of the new circuit of a condensate desalination plant, it is also possible to set up several blocks independently of one another to switch to one and the same desalination line. You can do that even in the case of several units within a power plant with only one condensate desalination system consisting of Zvvei streets get along if one assumes that only one condenser chamber is leaking at the same time. However, the relatively unlikely event occurs In the event that several chambers are leaking at the same time, one road must be regenerated either the performance of a block is reduced to about half load or a block can be switched off.

The new condensate desalination system also allows larger amounts of additional water to be supplied to the block via the system if necessary. The additional water can either be deionized water from reserve tanks, decarbonised water or, in exceptional cases, pre-cleaned raw water. The introduction of desalinated water in the Hotweil done "in this case expediently above ^ it water level of the corresponding un> j ri'.a.iiiiior in HotwelJ you oo degassing of water ER- · V k \ i \ X ν.'ΐ approx.

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The invention is explained in more detail at Hani of the drawing. The ' Figures represent exemplary embodiments in their essentials for the invention Parts represent. Same or corresponding parts are provided with the same reference symbols in both figures »

In Figure 1, 1 represents one. Capacitor represents the one made up of the two There is condenser chambers 2a and 2b. The hotwells 3a and 3b this chamber are through the partition wall 30a or 3-0 b into the sub-chambers 4a and 5a or 4b and 5b divided. The sub-chamber 5ö or 5 b is covered by the aperture 31 a or 31 b, so that the condensate precipitating in the condenser is initially in the lower chamber 4a or '4b; Is the condensate accumulated in perfect condition State, so it occurs' over the partition wall 30a or 30b into the chamber 5a or 5b and is pumped by the main condensate 22ä and 22l · pumped into the feed water tank. With help a drain regulator 23 is the condensate level in the lower chambers 5a and 5b held constant. A small part of the * condensate accumulating in lower chamber 5a or 5b (approx. 50 liters per hour) is over, one Kationenfiltef 6a or 6 b and One conductivity meter each 7a and 7b sucked off »The cation filters Remove 6a and 6b; volatile alkalizing agents from the Condensate. This converts any salts that may be present into the corresponding Acids transferred, and the 'sensitivity of the conductivity measurement elevated. The sub-chambers 4a and 4b are each a motor valve Qa or 8b and an intermediate pump 10a or 10b aaohwitched. If one of the conductivity meters 7a or 7b shows If the conductivity of the condensate is too high, the dependency from the result of this measurement the engine valve 8a or 8b depending on and the motor of the intermediate pump 10a or 10b is switched on, The 3 intermediate pump 10a or 10b is a flow control valve lla

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or lib downstream, which keeps the water level in the lower quay 4a or 4b constant. The contaminated condensate conveyed by the pump 10a or 10b passes through the valve 15a or 13b, the desalination line 15a or 15b, the motor valve 18a or 18b, and via the open valve 20a or 20b into the Uhterkammer 5a or 5b , from which it is finally pumped into the feed water tank by the main condensate pumps 22a and 22b. If, for example, the effectiveness of the desalination line 15a is exhausted, the motor valve 18a is closed and the motor valve 17a is opened as a function of the switching of the conductivity meter 16a connected downstream of the desalination line 15a. At the same time, however, the valve 13a is closed by hand or automatically and the valve 12 is opened, so that the contaminated condensate via the opened valve 13b, the desalination line 15b _f the opened motor valve 18b, the valve 20b and via the valve 19 into the sub-chamber 5a can get. It is also advisable to provide an electrical interlock of the motor of the intermediate pump 10b which becomes effective in this case. The same applies if the desalination line ■ 15b is exhausted.

When the power plant is started up for the first time, the condensate produced must first be passed through the desalination line 15a or 15b. Due to diffusion processes in the filter material, however, these roads do not become fully effective immediately, so that the condensate leaving them initially still has a relatively high conductivity. In this case, the condensate passes through the motor valve 17a or 17b, which is open depending on the switching of the conductivity meter 16a or 16b, when the motor valve is closed

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; ; ; ^; ; PLA 63/1774 ■ · Valve 18ä or 181sIns free and is discarded. Only after the conductivity has decreased to an adjustable maximum value is 17a or 17b closed and 18a or 18b opened by the conductivity meter 16a or 16b depending on the switching.

It is also possible to use the same desalination plant to desalinate the condensate that occurs in other power plant blocks. This is done via the motor valve -9a ... or 9b introduced into the system upstream of the intermediate pump 10a or 10b and discharged again via the valve 21a or 21b. Here too, a switchover of the condensate flow from a desalination road to the other readily available, it is of course necessary that the flow control valve or lla, lib: the electrically to ^1; connected block is switched.

The motor of the intermediate pump is expediently iOa or * IQb - "!;. Over a time relay switched off with a delay and the valve 13a or .. 13b closed with a delay * if the salty condensate after exhaustion: the desalination route I5a or 15b does not have the Valve 12 on the desalination line 15b respectively; 15a is switched,

The system can also be used for the production of Beionatha. For this purpose, the feed line 29 is closed Valves 13a and 15b pre-cleaned via valve 14a and 14b, respectively Raw water; ait not too high a salt content and as low as possible Carbonate hardness as well as low. Content of organic substances added » The deinate can be withdrawn via the valve 21a or 21b will. The same applies to the treatment of contaminated condensates possible, with operation of the desalination plant, which must also be possible with perfect condensate quality, can be

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Condensate, for example, via the valve 14a or 14b lower raw water stream are added in order to exploit ₀ eneration economic operational reasons of exhaustion of the filter material required-Re and thereby generate additional deionized water. With the addition of non-degassed. Raw water is' expedient to introduce the water introduced into the chamber 5a or 5b above the condensate level in order to simultaneously achieve degassing of the water in the hotwell.

The rinsing and washing of the individual filters during regeneration is best done with deionized water from a storage container is fed through the valves 14a and 14b. This avoids briefly large amounts of condensate in the block are withdrawn, which on the other hand must be replaced by deionized water. Only the last wash can then with condensate take place in order to displace the oxygen-containing Y / ash water from the desalination lines.

In FIG. 2, the hotwells 25a and 25b are not subdivided, but there is a common condensate collecting container 26 for this purpose provided, in which the perfect condensate from the two chambers 25a and 25b passes through the valves 27a and 27b. Even the condensate withdrawn from the desalination lines 15a and 15b is fed into this condensate collecting tank 26. The water level Both the hotwells 25a and 25b and the container 26 are regulated with the aid of the flow controller 23. When switching the system on other blocks is the condensate to be desalinated Via the Zwiochenpurape 28a or 28b and the motor valve 29a or 29b between the Abiaufregelventil lla or 11b and the

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Valve 13a or 13b supplied "Ira rest" works the system shown in Figure 2 in the same way; like the system according to I ¹ IgUr 1.. ' : e ^ : ■■ -. · ■ · , -.

13. Patent claim
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Claims (1)

3 PLA 63/1774 lj condensate desalination device for one or more in two separate chambers subdivided condensers of a high pressure steam power plant, in particular with a once-through boiler in which each of these two chambers is assigned a desalination line is, characterized in that when salt penetrates into the condensate of a condenser chamber (2a or «2b) this over one to; opening valve, (1Ia or lib) and an intermediate " pump (10a or «10b), both of which are dependent on the control of a conductivity meter (7a or 7b) charged with condensate, which is attached to the leaky condenser chamber (2a or »2b) assigned desalination line (15a or, 15b) is fed, but in the event of their exhaustion after Closing the downstream of the desalination line (15a or 15b) Ventila (18a or 18b), depending on the control of one between the desalination line (15a or 15b) and the conductivity meter (16a or 16b) connected to the valve (18a or 18b), via the valve (12) to the other Desalination road (15b or 15a) assigned to the condenser chamber is switched manually or automatically. 2. Device according to claim 1, characterized in that between the conductivity meter (16a or 16b) and the valve (18a or 18b) the condensate is released through the valve (17a or 18b). 17b) can be deducted that in control dependence 'from the conductivity meter (16a or 16b) and is open when the condensate leaving the desalination line (15a or »15b) exceeds a maximum permissible conductivity value, " ⁹ " BAD ORIGINAL V / l / Di 909S05 / 0A11 ; j JLA 63 / 1774- ♦ 3 · Device according to claim 1 and 2, characterized? that - preferably via a time relay - the motor of the dual pump (10a or 10b) is switched off with a delay and the valve (13a or, 13b) is closed with a delay if, after exhaustion of the desalination line (15a or 15b), the salty condensate does not pass through the valve 12 on the. - .. Desalination line (15b or »15a) is switched 4". Device according to claim 1 to 3, characterized in that the motor of the intermediate pump (10b or 10a) control? ; moderate,: especially electrical: is locked when after. He—; creation of the desalination route - (15a or »15b) the salty ; Condensate from the "condenser chamber (2a or 2b) is passed over; the Efotsalzungsstraße (15b or 15a)" is * - ■ y ^; : 5. Execution according to claim 1 to 4, characterized in that that the Hotw.ell (3a or 3b) everyone; The condenser chamber (2a or; 2b) is divided into two sub-chambers (4a; 5a or «4b \ 5b) by the partition wall (30a or» 30b) and above the chamber; (5a or »5b) a deflection diaphragm (31a or 31b). Is arranged. 6. device according to claim 5, characterized in that im In the event of salt penetration into the condensate, this from the: upstream hobwell lower chamber (4a or 4b) removed "" and via the Ehtsalzungsstraße (15a or 15b) to the * .switched hotwell sub-chamber (5a or 5b) is supplied, from which finally the condensate in the feed water tank is pressed. · V. ; . 7. Device according to claim 5 or 6, characterized in that the condensate level in the upstream Hotwell- ^. " ■■ Unteramiher (4a or 4b) by an intermediate.! ■" .. pump (rOa or .. 10b ) and de-salting line (15a or 15b) controlled drainage valve (Ha or lib): ..;.; ■: " ^: -; ...: ■? ■ bad BtetNÄL: 9 0 9805/0 ^ 11 -; 10 -; ■. '■" . PIA 63/1774 8. Device according to claim 5 to 7. » characterized in that the condensate level in the downstream Hotwellunterkaimiier (5a or 5b) through an intermediate condensate pump (22a; 22b) and the feed water tank switched Drain regulator (23) is regulated. 9. Device according to claim 1 to 4, characterized in that that via valves (27a and 2? b) to the non-split Hotwells (25a and 25b) connected to a condensate collector (26) is, into which the condensate conducted via the desalination route (15a and 15b). is directed. 10. Device according to claim 9, characterized in that the condensate level in the hotwells (25a and 25b) and in Condensate tanker (26) through the between the main condensate pumps (22a; 22b) and the feed water tank Drain regulator (23) is regulated. 11. Device according to claim 5 to 10, characterized in that that part of the condensate from a Hotwell Unterkamiaer (5a or 5b) or from the hotwell (25a or 25b) via a cation filter (6a or 6b) to the conductivity meter (7a or »7b) will. 12. Device according to claim 1 to 11, characterized in that saline condensate from other capacitors vieiterer Power plant blocks via the valve (9a or 9b) between valve (8a or 8b) and intermediate pump, (10a or 10b) or with a separate intermediate pump (28a or.-8b) via the motor valve (29a or 29b) directly in front of the desalination line (15a or 15b) between the drain control valve (11a or lib) and Valve (13a) or (13b) supplied to the system, directly - 11 - Wl / Tue BATH ORIGINAL 909805/0411 63/1774: 14511 ^ 1 via the de-gelling line (15a or 15 "b) or via the valve (12) and the desalination line (15b or 15a) and withdrawn again behind the valve (21a or 21b) canoe, whereby the drain control valve (11a or »lib) is electrical on the measuring transducer for the discharge control valve (lla or lib) switched on in the hotwells of the connected power plant unit will. Device according to Claims 1 to 12, characterized in that pure or pretreated fioline water is used to produce deionized water with closed valves (13a and 13b) * via the valves (14a or 14b) between the valves (13a and 13b) and the desalination line (15a or 15b) is fed to the system. BATH - I: ¹ -