JPS62210022A - Device for removing foreign matter in water for cooling condenser of electric power plant - Google Patents

Abstract

PURPOSE:To effectively remove the foreign matter in the water for cooling a condenser of an electric power plant by providing a rotatable filter element which can be effectively washed without stopping the operation in a casing. CONSTITUTION:The two rotatable filter elements 2 which are arranged in series in the casing 1. One of the elements is arranged so that the surface is at right angles or inclined to the flow direction, the other element is arranged almost in parallel with the flow direction, two discharge valves 6 are closed, and the main stream is filtered by either of the elements 2 on the upstream side and the downstream side. When the element 2 on the upstream side is washed, the element 2 is rotated so that the surface is almost paralleled with the flow, the discharge valve 6 on the upstream side is opened, and a part of the main stream is branched to discharge the foreign matter to the outside. The element 2 on the downstream side is washed in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is utilized in the technical field of effectively removing foreign matter in cooling water of a power plant condenser.

Conventional technology FIG. 7 shows a conventional foreign matter removal device.

explain.

The ends of a member 8 extending in a direction perpendicular to the flow direction (arrow) at approximately the center of the casing l and forming two flow paths are attached to the inner surface of the casing 1, and the ends of the member 8
Filter element 2 installed along the longitudinal direction of
, a cutter 41 body 3 operable to block one of the two flow paths formed by the member 8 and the casing 7 and guide fluid to the other flow path, and a filter element for the two flow paths. A foreign matter discharge port 4 provided in the casing 1 upstream from the installation position of 2, a discharge pipe piece 5 and a discharge valve 6 connected to the foreign matter discharge port 4 are provided, and backwash water is discharged to the outside of the filter element 2 as necessary. It is a removal device.

Problems to be Solved by the Invention The conventional foreign matter removing apparatus as described above has the following problems. In other words, when cleaning the filter element,
By blocking a part of the main flow with the switching valve body 3 and simultaneously opening the discharge valve 6, a backflow is generated to the filter element located downstream of the switching valve body 3, thereby removing foreign matter from the discharge pipe piece 5. Since it uses backflow, not only does the pressure drop during cleaning become large, but also the shape of the switching valve body 3 and the arrangement of the foreign matter discharge port 4 must be properly designed to prevent the filter from discharging. Element 2 cannot be effectively cleaned.

The present invention is intended to solve the above-mentioned problems and to perform foreign matter removal work with a high cleaning effect.

Means for Solving the Problems The present invention takes the following measures in order to solve the above-mentioned problems. That is, a rotatable filter element is disposed inside the casing to effectively clean the filter element without stopping operation.

Effects According to the means described above, effective cleaning can be achieved by the effects described below.

The operation of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 shows a normal operating condition, in which one of the two rotatable filter elements 2 arranged in series inside the casing 1 is arranged such that its surface is perpendicular or oblique to the flow direction. The other side is arranged substantially parallel to the flow direction, the two discharge valves 6 are both in a closed state, and the main flow is directed to either the upstream or downstream filter element 2. filtered by.

Figure 2 shows the situation when cleaning the filter element 2 on the upstream side.The filter element 2 on the upstream side is rotated so that its surface is almost parallel to the flow, and the discharge valve 6 on the upstream side is opened. , instead of using backflow, part of the mainstream is branched to release foreign matter to the outside. On the other hand, the filter element 2 on the downstream side can filter the mainstream by rotating so that its surface is perpendicular or oblique to the flow. The situation when cleaning the filter element 2 on the downstream side is also the same as above.

Embodiment Next, an embodiment of the foreign matter removing device according to the present invention will be described in detail with reference to FIGS. 1 to 6.

Figure 1 shows a case in which two rotatable filter elements 2 are arranged in series in a casing 1 (sometimes a part of the pipe line is used as the casing), with each filter element 2 on the upstream side. is provided with a foreign matter discharge port 4, a discharge pipe piece 5, and a discharge valve 6.

Further, FIG. 3 shows an example in which two rotatable filter elements 2 are arranged in parallel, and includes a switching valve body 3 for guiding a part of the main flow to the discharge pipe piece 5 during backwashing.

FIG. 4 shows an example similar to FIG. 3, in which the discharge pipe piece 5 is attached diagonally to the casing 1.

FIG. 5 shows an example in which the rotatable filter element 2 described in the present invention is used in a conventional cleaning type using backflow. In normal times, as shown in FIG. The filter element 2 is positioned so that its surface is parallel to the flow, and during backwashing, the filter element 2 is rotated 90 degrees as shown in Fig. 6, and then the switching valve body 3 is rotated within 90'. The discharge valve 6 is opened to discharge foreign matter trapped in the fixed filter filter 2b to the outside due to backflow.

Effects of the Invention According to the foreign matter removal device of the present invention, by using a rotatable filter element, the pressure loss during backwashing is smaller than that of the conventional type, and an excellent cleaning effect is exhibited.

[Brief explanation of drawings]

FIGS. 1 to 6 relate to the present invention; FIG. 1 is a sectional view showing the function during normal operation; FIG. 2 is a sectional view showing the function during cleaning of the filter element of the embodiment shown in FIG. 1; The figure is a cross-sectional view of an example in which elements are arranged in parallel, Figure 4 is a cross-sectional view of an example in which the discharge pipe piece is attached diagonally to the casing, and Figure 5 is a cross-sectional view of an example in which the elements are arranged in parallel.
The figure is a cross-sectional view of an example using a rotatable filter element, FIG. 6 is a cross-sectional view showing a mode in which foreign matter is discharged to the outside, and FIG. 7 is a cross-sectional view showing a conventional foreign matter removal device. 1. Casing, 2 @ Filter element, 2b-
-Fixed filter element, 3--switching valve body, 4--foreign matter outlet, 5--exhaust pipe piece, 6--exhaust valve, 7--partition plate. Sub-agent Tadashi Kimura 1. j C and 7 others) Figure 1 Figure 2 Figure 3 Figure 5 Figure 6 Figure 7 Figure 4 Non-disclosure

Claims (1)

[Claims] A foreign matter removal device consisting of a casing, a filter element, a discharge pipe piece, and a discharge valve, with a rotatable filter element installed inside the casing to effectively clean the filter element without stopping operation. A device for removing foreign matter from the cooling water of a power plant condenser.