DE1551257A1 - Arrangement of the LP preheater in steam turbine systems with high output with multi-flow LP parts - Google Patents

Description

Arrangement of the low pressure preheater in Dempfturblnenanlagen large output with multi-flow LP "parts. The invention relates to the preheater arrangement and circuit for several double, flow low-pressure parts of high-output steam turbines. Used to improve the heat economy in the area of parallel working Low-pressure parts of steam turbines a multi-stage preheating of the feed water provided by extraction steam, so it is a difficult 11th problem, with a simple design of the turbine and little space required, an advantageous and simple design of the entire: eitungssjs "u-ems for sampling and feed water circuits According to the invention, the above-mentioned object is achieved in that each low-pressure part is assigned a feedwater preheater of a different preheating stage in its condenser connector, and that the feedwater preheaters, based on the low-pressure parts, are asymmetrically connected to different stage taps 49 4 are closed and the Speinewasserstroni is guided in a single guide through the preheater connected to different mares of the Nlederdrucktotle. In the following, the invention will be explained in more detail anherid der Zei eerung. Figure IL of the drawing shows in principle the arrangement and layout of the feed water "7o .-, b, .iärr" for a single turbo set, because of three parallel working double-sided printing parts 41 - has. FIG. 2 shows a variation with only two low-pressure points, but three feed water preheaters. In the exemplary embodiment in FIG. 1 , T denotes a single-shaft turbo set for driving a generator G. The turbo set consists of the ""#-loehdrijekte.41-1-'D and three low-pressure parts obtained in parallel ND1 »4 are through a M # 2 U 3. Turbine station and generator connected shaft train, FL is the fresh steam supply line, #V ! .1; 1; the, 'jberstrÖr., line to the low-pressure parts ND to ND In the The low-pressure line is upstream of the low-pressure share an intermediate superheater to be provided. The low pressure parts ND 1 IID and ND, are assigned to feeder preheaters V and V., V respectively 3 1 three feed water preheaters are on the path side to those of the condenser incoming K,) ndensat ".. eltung K connected * The condensate is subsequently agitated each other through the preheater V " V 20 V3 and proceeds to- closing over ggt. existing preheater of the high pressure part as well as the SpäisewegaerpUhpe zue Keseelsystem. what to simplify in the Vigur of the drawing is not shown , Speisowesserverw, h, * mer V to V via feed lines A to A 3 3 -agymmetriachp - ie to different mares of the low pressure point. ble UD4 connected so that - In the preheaters V to V one -is .. For example , ## gutlehmände sparing water temperature available enett A Inside the condenser Maintenance A to A #: # 4iäzö --n- the TurbInentelle eD, to JMD In a curved arrangement the: 9th paddle stages. 2 or - 5 or 7 - of the two waters of the named 44 -sen se: #e .. in the figures are r, ne, share evenly with St die In. e-printing! or bezelchinet #te ; bi-Oh-'äuq enables the errindung- switch wire forward », r with a broken shape 00, -Anor num us- tod * HI * uoktello _MD X. D an extraordinarily simple one Do the VorW # tWern - with the least amount of cable and ge # us. of the entire Sp # etiseWässerkrölseex Figure 2 shows a slightly different arrangement again in softer in the presence of only two double-flow low-pressure turbine Tellen 1 "Dip th Speisewasservorwärmstufe with a vorzugswe.ise, ND 2 ene dril.

a u .. 2 SpelnewasservorwUnrer V # arranged inside the condenser nozzle or condenser domes, In addition to asymmetrically narrow-3 arranged an7api'r, * levels A 1 and A 2 on the low-pressure parts ND 1 and ND 2, further an2 # are at the last-mentioned points apf levels A 3 t and A 3 P-Gt honogenic steam extraction available, the series of external extraction line ELT and a extraction control valve ER, to the third feed wasservorwit, -nrer V 3 1 are connected. The circuit according to Fig. 2 not possible '.- A separate electrical system management of the feedwater. -In particular], changes may be made to the'beehrebenen Examples of examples are provided in 9 the Er. ,, Indung you apply in the case that instead of double 14- # ederdrucil-.te # l-le at least one of the same applies Is. uren

Claims (1)

P atentans p r U c he , #i Damp.I. "turblnensa-tz with several pairallel working, with parallel Dempfströmungen acted upon by low-pressure parts as well as multiple Ppelsewasjervorwärmung with arrangement of preheaters in the condensers - Za'Lorstutzen, characterized in that each low-pressure part (LP IJDPI ND) has a seawater preheater in its condenser nozzle 3 (V -3 $ VIDP V is assigned to another VorWirmstufe and that the Feed water preheater (V19 V 2-1 V based on the various Low-pressure parts asymmetrically on different step taps are connected and the feed water flow In einstr # £ E-ngiZer Y '.: Guidance through the different stages of the low pressure parts connected preheater is passed (Figure 1). 2. Daz-ipftt., Rbi-nsatz according to claim l » characterized in that li - 2L d (-jcjpctf'Lut4 £ ger formation of the low pressure partb which is asymmetrical at the left, eder pressure points provided feed water taps in hono -, - # Y-ner arrangement with the same steps of the two existing doors c # ü -; neni.'1, jt.r-in are connected. (Figure 1). Steam turbine set as claimed in claim 1, characterized in that Assy # itzlich to the in asirmmetrtscher circuit of taps of the low-pressure parts dampfseltig connected, in the capacitor nozzle or -don arranged feedwater (NDV ND 2). (V .. vi) at least one further, for example, outside the condenser nozzle ordei, -3r "),) ice water preheater (V -3 ') is present, which is connected to a Connection (EI,) of s "r -, imetric taps (A -3 '.-A.") Different which lilacdricktelle (&? IDID ND 2 ) is connected (Figure 2).