JPH0733886B2 - Equipment for degassing - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for thermodynamically degassing turbine condensate in a water supply container, for example, in which the water to be degassed is mounted on the water supply container. And the necessary heat is introduced through the steam passage and the steam distribution mechanism in the water supply container, and the injection limiting wall arranged in the upper inner area of the water supply container is introduced. It has, the exhaust connection part is provided through the container peripheral wall in the space above the injection limiting wall, the water supply pipe in the center of the chamber penetrates vertically through the peripheral wall of the water supply container, A head, which surrounds the lower opening of the water supply pipe and is configured as a water receiver, is provided with lateral radial holes, the holes being associated with the height position and the injection parabola being associated with each load of the device. Formed so that it reaches the injection limiting wall in case of On things.

2. Description of the Related Art A gas venting device of the type described above is disclosed, for example, in German Patent Application Publication
It is known from the specification of 2454423 (JP-A-51-72803). In this case, the ring chamber between the water supply pipe and the water receiver directly surrounds the water supply pipe. That is, the inner boundary surface of the ring chamber, that is, the outer surface of the water supply pipe has at least about the same temperature as the supplied water. Therefore, the vapors flowing into the ring chamber via the holes, that is to say during almost partial load operation, condense on said faces. Due to such condensation, condensation impacts occur in the partial load range, especially in relation to the relatively small hole diameter in the upper region of the water receiver holes,
Such condensation impacts lead to obstruction of the degassing action, unpleasant noise and unfavorable material loading.

Problem to be Solved by the Invention An object of the present invention is to eliminate the above-mentioned drawbacks and eliminate the risk of condensation shock as simply and persistently as possible.

Means for Solving the Problems In order to solve the above problems, according to the means of the present invention, between the inner chamber of the water supply pipe and the ring chamber in the water receiver in the section where the water supply pipe rushes into the water supply container. It is equipped with a heat insulating part.

ADVANTAGES OF THE INVENTION By means of the invention, the heating of the outer surface of the water supply pipe or the insulation of the water supply pipe to the temperature of the steam is carried out very rapidly based on the steam flow from the inside of the vessel into the ring chamber, so that steam condensation is avoided. Or, in any case, it is significantly reduced.

In a particularly simple manner, the thermal insulation is provided by a pipe piece which surrounds the water supply pipe with a ring gap. In this case, the air present in the ring gap acts as an insulating material. The ring gap is closed below by the water in the sump. Even if the ring gap is once open upwards, the water will rise to the surface level of the sump. The upper part of the water supply pipe in each case has the insulating effect of the air that is present there. Instead of the tube piece, another suitable insulating material may be used.

In another embodiment of the present invention, the holes in the water receiver are constructed with different diameters for each row increasing from bottom to top, with the bottom row of holes being slightly above the water supply pipe. Flow rate corresponds to the lowest partial load of the device and the total flow rate of all holes corresponds to the full load of the device. Condensation impact is likewise reduced on the basis of such a hole size, since said hole size causes a pressure difference between the ring chamber and the interior of the container to be smaller than in the case of a smaller hole diameter in the upper row of holes. This is because it will be reduced in a short time. Such an arrangement, in particular, avoids condensation shock altogether due to the water inflow into the ring chamber in connection with the insulated water supply pipe.

Example Water to be heated and degassed flows into the filtering device 2 through the side connecting pipe 1. The filtering device 2 has a vertical cylindrical peripheral wall 3, which is flange-connected to a water supply container 4. The tubular filter 5 is attached to the cover 7 and is inserted into the peripheral wall 3.

The dirt removed from the water by the filter settles in the lower section of the removal chamber 8 which is closed below by the ring 6 and is led out via the cleaning connection 9.

The mechanically cleaned water flows into a water supply pipe 10 arranged below the filter 5. The water supply pipe 10 is tightened between a flange connection portion with the peripheral wall 3 and a connection flange 18 of the water supply container 4.

A head 11 configured as a water receiver surrounds the lower section of the water supply pipe 10. A minimum water surface is formed in a ring chamber formed between the head 11 and the water supply pipe 10. The minimum water level prevents, for example, backflow of steam into the water supply pipe 10 at low loads and thus condensation impact. The head portion 11 has a plurality of hole rows 12. The height position of the hole row 12 in the head 11 is such that the jet flow of water passing through the hole row 12 always collides with the inner surface of the jet flow limiting wall 13 that opens downward even when the load of the degassing device changes. Has been selected.

The jet flow restricting wall 13 continues upwards into a cylindrical section 14 which is rigidly connected to the water container 4 at its upper edge. In the area enclosed by the section 14, one or more exhaust connections 15 are led to the outside through the water supply container 4, through which the non-condensable gas is led. A web 19 connects the jet restriction wall 13 to the head 11.

The required heating steam is introduced into the water in the water supply container 4 in a known manner via the steam supply conduit 16 and the steam distribution mechanism 17.
Steam rising from the surface must pass through the water shield twice. First, the steam passes through a water shield formed by collision with the inner surface of the water jet flow restricting wall 13 and subsequent dripping. The steam then passes through a jet parabola exiting the outlet of the hole array 12. The water is therefore heated to the saturation temperature (mixed condensation), which leads to the degassing effect. The non-condensable gas collects in section 14, which is the coldest section of the degassing mechanism and is directed via exhaust connection 15.

The row of holes 12 is fully loaded by the water to be degassed at full load. During partial loading, part of the upper row of holes remains open corresponding to the low water level in the head. Steam passes through the row of holes that remain open and the head 11 and water supply pipe
It flows into the ring chamber between 10 and. Here, in order to suppress the condensation, the pipe pieces 10a are inserted in the water supply pipe 10 with a gap therebetween, and as a result, a ring chamber is formed between the water supply pipe and the pipe piece, and an adiabatic action is produced. Furthermore, the row of holes 12 is constructed with a diameter which increases steadily from below to above, so that the large holes above are open in all partial load ranges. The vapor generated in the ring chamber no longer causes a condensation shock if it is desired to condense in a small volume despite the insulation, because the pressure fluctuations in the ring chamber are compensated without problems via large holes. Because.

[Brief description of drawings]

FIG. 1 is a partial view of an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion II in FIG. 1 ... Connection pipe, 2 ... Filtration device, 3 ... Peripheral wall, 4 ... Water supply container, 5 ... Filter, 6 ... Ring, 7 ... Cover, 8 ... Removal chamber, 9 ... Washing connection part , 10 …… water supply pipe, 11 …… head, 12 …… hole array, 13 …… jet flow limiting wall, 14
...... Category, 15 …… Exhaust gas connection, 16 …… Steam supply conduit, 17
...... Steam distribution mechanism, 19 ...... Web

Claims (3)

[Claims] 1. A device for thermodynamically degassing turbine condensate in a water supply container, for example, wherein the water to be degassed in the water supply container is supplied via an injection mechanism and steam The necessary heat is introduced through the steam distribution mechanism in the passage and the water supply container, and the injection restriction wall is arranged in the upper inner area of the water supply container. The space is equipped with an exhaust connection, which is guided through the peripheral wall of the container, and a water supply pipe penetrates vertically through the peripheral wall of the water supply container in the center of the chamber, around the opening below the water supply pipe. The head, which is configured as an enclosing water receiver, is provided with lateral radial holes, which are peripherally arranged in relation to the height position so that the injection parabola reaches the injection limiting wall at each load of the device. In the type described above, the water supply pipe (10) is Degassing, characterized in that it is provided with a heat insulating portion located between the inner chamber of the water supply pipe (10) and the ring chamber of the water receiver (11) in the section that projects into the water container (4). Equipment for. 2. The device according to claim 1, wherein a pipe piece (10a) surrounding the water supply pipe (10) with a ring gap is used as the heat insulating portion. 3. The holes (12) in the water receiver are formed with different diameters in each row increasing from the lower side to the upper side, and are located slightly above the lower edge of the water supply pipe (10). 3. The device according to claim 1, wherein the flow rate of the lowest row of holes corresponds to the lowest partial load of the device and the total flow rate of all holes corresponds to the total load of the device.