DE1913228C - Device for separating water from wet steam and for subsequent overheating of the steam - Google Patents

Description

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There is no restriction on the tubes of the container. The adaptation of the optimal tube bundle to the mattress surface is easy because the tube length does not have to be varied. For repairs short pipes are easier to replace. The direction of flow of the steam is always transverse to the pipes, wherever the overheated is taken Steam takes place. The pressure loss is minimal because the wet steam is very little deflected and the steam velocity is kept as constant as possible when flowing through the device, because of the short tubes, the flow resistances in the superheater can be influenced better possible. The compact design enables smaller dead spaces and smaller stored steam volumes, consequently a reduction in the risk of an overspeed of the low-pressure turbine occurring, ζ. Β. at sudden load disconnection. The device according to the invention only requires approximately the same power two thirds of the space previously required, and the weight is correspondingly smaller. she is simple in structure, so that favorable conditions also exist with regard to cleaning.

An embodiment of the invention will then be explained with reference to the drawing, which shows a schematic representation of a cross section through the device.

The cylindrical container 1 with the imaginary longitudinal axis 2 serves as a jacket for the device. The entry of the wet steam takes place through the inlet opening 3 in the container bottom, while the superheated steam flows out through the outlet nozzle 4, which can be arranged at any point along the container. The shielding wall S is installed between the inlet opening 3 and the inflow space 7. The drainage line 9 is located at the lowest point of the container. The wire mesh mattresses 11, 12, 13, 14 are offset from one another and arranged one above the other, they serve to drain the wet steam. Between these wire mesh mattresses, the droplet cover plates 17, 110, 19 are provided, which connect the inflow area of one mattress with the outflow area of the mattress arranged above, in such a way that two of the following mattresses meet: i mK the associated droplet cover plate with a Z-shaped cross-section to appear. The broods A, B, C, D of the mattresses 11, 12, 13, 14 are proportional to the steam inflow cross-sections AB, BC, CD, DO. This ensures that the steam entry speeds into the spaces between the wire mesh mattresses are the same. Behind the wire mesh mattresses there is a steam outflow space 21 in which there are sharply inclined bundles of superheater tubes 22. These run in normal planes to the longitudinal axis 2. The superheater tubes 22 are acted upon via a heating steam inlet connection 24 and a distributor 26. At the outlet of the superheater pipes, the collector 27 with the condensate outlet nozzle 25 is provided for discharging the condensate that arises.

ίο The wet steam flows when the system is in operation from the high pressure part of the steam turbine system through the inlet opening 3 into the container 1, in which it is largely deflected by the shielding wall 5 in order to reach the inflow space 7. the free inflow area between the shielding wall 5 and the jacket of the container 1 in the inflow area 7 is approximately the same size as the cross section of the inlet opening 3. Durc. the installation of the shielding wall S is prevented, ie the wet steam with ao flows at high speed directly into the space under the wire mesh mattresses 11, 12, 13, 14. Also w> rd thereby a more even exposure of these rooms with wet steam achieved as well as a Direction of flow of the steam, which allows

»5 to flow through the device with practically no further significant deflection. In the inflow space 7 further fixtures for rectifying and evenly distributing the steam along the container 1 can be provided, such as. B. Um-

Steering baffles, perforated sheets or the like by means of the built-in Wire mesh mattresses, most of the water contained in the wet steam is excreted. This reaches the drainage line 9 and from there is fed back into the steam cycle.

The almost anhydrous steam then flows around the superheater tubes 22, in which the through the inlet nozzle 24 incoming heating steam gives off its heat to the dewatered steam and condenses, the condensate through the sloping

Hitzerpipes 22 flows into the collector 27, from which it is through the outlet nozzle 25 also the Steam circuit is supplied. The dewatered steam sweeping around the superheater tubes 22 becomes overheated and enters through the outlet nozzle 4 in

the low-pressure part of the steam turbine system.

As can be seen from the drawing, in the device described, the wet steam is in one Passage through the wire mesh mattresses and then fed directly through the superheater.

tet. Both the mattresses and the superheater can extend the full length of the container.

1 sheet of drawings

Claims (5)

1 91322 $ 7 t nj steam axially in the horizontally lying, cylindri- claims: see container is introduced. In the lower half of the loading container are superimposed, symmetrical 1. Device for separating water arranged wire mesh mattress:;, in the upper from wet steam and the subsequent superheat- 5 container half is a superheater with horizontal, zen of the steam with steps running one above the other parallel to the longitudinal axis of the container arranged wire mesh mattresses with built-in tubes. The incoming wet steam is Flow areas with the outflow area, which each lead downwards, flows through the Matratweils overlying mattress through drop zen and afterwards the superheater tubes and steps after cover plates are connected, and with one in the io on top. Steam flow downstream bundle of over- This device has several disadvantages heat tubes that are together in a cylindri-on. The length of the container grows approximately proportionally Containers are housed, the one inlet with the system capacity, but not the pipe length, Let opening for the wet steam in the container bottom, which is a difficult adjustment in each individual case and an outlet port for the overheated 15 or new design conditional. This is also the maximum Steam has thereby marked possible pipe length limiting the length of the net that the superheater tubes (22) across the container. By the flow of steam to the The longitudinal axis (2) of the container (1) run and the outlet nozzle is already in the superheater are strongly inclined. a horizontal flow component, whereby the 2. Apparatus according to claim 1, characterized ge ao pipes no longer crosswise, but rather obliquely indicates that the free inflow area into the, which reduces the heat transfer. the Inflow space (7) in front of the wire mesh mattresses multiple steam deflections increase the (II, 12, 13, 14) approximately equal to the transverse pressure loss. The arrangement of the superheater tubes cut of the inlet opening (3) for the wet steam parallel to the container axis results in a poor Ausist. 25 use of the container cross-section and inevitably 3. Device according to claim 1, characterized in dead spaces, which leads to large dimensions, The resulting condensate must enter the inflow space (7) by means of flushing steam directions for even distribution of the discharged, so there must be more heating steam to-D.mpfes and introduced for flow straightening than would be necessary for overheating, are built. 30 which means a loss of efficiency in the system 4. Apparatus according to claim 1, characterized in that. indicates that the widths (A, B, C, D) of the invention is based on the object for Wire mesh mattresses (11, 12, 13, 14) are the structure of the device for separating what-steam inflow cross-sections (AB, BC, CD, DO) from wet steam and the subsequent overhit proportions. 35 zen of steam a versus the proposed 5. The device according to claim 1, characterized in that the device is technically and economically more favorable indicates that the outlet nozzle (4) can be found for the concept. superheated steam diagonally upwards, e.g. B. under This task is according to the invention thereby 45 °, is directed. solves that the superheater tubes transverse to the longitudinal axis 40 of the container run and are steeply inclined. To avoid unnecessary pressure losses due to changes in cross-section To avoid in the flow path of the wet steam, it is useful if the free inflow area in the inflow area in front of the wire mesh The invention relates to a device for mattresses approximately equal to the cross section of the separating water from wet steam and to the inlet opening for the wet steam.
closing overheating of the steam with stairs- To achieve a full and uniform wire mesh placed on top of each other, it is advantageous to act on the mattresses in Tratzen whose inflow areas with the outflow and inflow space facilities for uniform the overlying mattress through distribution of the steam and to the constant flow droplet cover plates connected, and to be built in with a direction. The attainment of this goal is thereby under- heat pipes, which together in a cylindrical supports that the widths of the wire mesh mattresses Containers are housed, the inlet opening proportional to the steam inflow for the wet steam in the bottom of the container and an outlet. has step connections for the superheated steam. A good use of the container cross-section In today's construction of nuclear power plants, it is made easier that the outlet nozzle for lets the steam the high pressure part of the turbine mostly the superheated steam obliquely upwards, z. More colorful already wet. Usually the water is directed from the 45 °. sem steam deposited and the dehydrated steam 60 are the advantages achievable with the invention then overheated by live steam, before being of multiple kinds. The strong tendency of the superheater the low pressure part of the turbine is performed. The pipes ensure safe self-drainage, this improves their efficiency and no purge steam is required for this. Through the avoided eroding the low-pressure blades. Arrangement of the pipes transversely to the longitudinal axis of the bed. 65 holder, the space, especially in the reverse direction, separating water from wet steam and exercising the superheater, can be better used, so that at Subsequent overheating of the steam is a device of the same container cross-section larger mattresses has been suggested at which the can be built. Regarding the length of the