DD240837A1 - DEVICE FOR SEPARATING SOLIDS FROM LIQUIDS - Google Patents

Abstract

The invention relates to a device for separating solids from liquids in a large pipeline, in particular for coarse dirt separation from the cooling water of power plant condensers. The device is intended on the one hand to prevent overloading of the sieve body and at the same time enable the removal of the separated solids during the operation of the plant. For this purpose, the separator must be designed so that even with added Siebkoerper the supply of the downstream modules is guaranteed with Kuehlwasser. The solution is carried out by inserting into the pipeline a sieve combination of successively arranged pan-like sieves whose sieve surfaces only partially cover the pipe cross-section. The free opening is covered by the respective following Siebflaeche.

Description

embodiment

The invention will be explained in more detail in an embodiment and is illustrated in the accompanying drawing by the sectional view of a screen combination.

In the pipe 1, the sieve combination according to the invention is used, consisting essentially of two large 2; 2 'and a small 3 frustoconical, open on both sides screen exists. They are successively arranged coaxially in the pipeline 1, wherein the small sieve 3 between the large sieves 2; 2'liegt. With the sieve edge of the large base, the large sieves are attached to the inner wall of the pipe. The small bases 4; 4 'of the big sieves 2; 2 'show against the current direction, while it is reversed in the small screen 3. The measure of the large base diameter 5 of the small sieve 3 is slightly larger than the small base diameter of the large sieves 2,2 '.

With this sieve arrangement arise storage spaces 6; 6 '; 6 ", in which coarse dirt deposits and can be discharged via suction lines 7, 7 ', 7" connected there. The shut-off elements 8; 8th'; 8 "are controlled by the differential pressure measuring device 9, which measures in front of and behind the screen combination.

The advantages of the solution according to the invention are to be seen in particular in that the active screen surface, sometimes even several times, covers the pipe cross-section, but at the same time an emergency opening for sudden heavy pollution, failure of the differential pressure u. a. is available at all times. If the screen combination, as shown in the drawing, installed directly in front of a riser, so should be installed for such cases in the lower part of the manifold 10, a collecting container 11 for falling coarse debris. Firmly adhering coarse dirt can be removed manually during standstill.

Compared to other embodiments, in the embodiment described in the truncated conical sieves combination the initially paraxial water flowing through the sieve holes is deflected so that it flows directly into the flow path of the emergency opening and urges the unpurified water in the storage space of the following sieve. The same positive effect is also achieved when extending the sieve combination to more than three sieves. It is then only necessary to move the suction lines of the small sieve 3 through the annular gap of the emergency opening channel.

Another significant advantage is to be seen in the direct installation option of the sieve combination in the pipeline 1.

Elaborate ring channels (see AS 2063890) or fault-prone movable flaps (see AS 2202759) are not required.

It is possible, even without suction lines 7; 7 '; 7 "would carry out this sieve combination, which would accumulate in the storage spaces 6, 6 'the specifically heavier debris, which are then removed manually at scheduled stoppages.

Compared to the solutions with ring channels and movable flaps, this screen combination represents a simple but effective solution.

Claims (2)

Invention claims: 1. A device for separating solids from liquids in a pipe with a conical inserted into the pipe strainer and suction line, characterized in that in the pipe (1) a sieve combination is used, consisting of several, the pipe cross-section partially covering, successively arranged sieves ( 2; 2 '; 3), wherein the sieves or a part of the sieves are formed like a container and arranged so that their flowed surface covers the opening of the screen presented far and at the base of the Behaviorary sieves (2, 2', 3) a Extraction line (7, 7 ', 7 ") is connected. 2. Device according to claim!, Characterized in that the sieve combination preferably consists of several, coaxially juxtaposed, open on both sides frustoconical large and small sieves (2, 2 ', 3), the mutually large sieves (2, 2') with the small Base (4) and small sieves (3) are arranged with the large base (5) against the direction of flow in the pipe (1). For this 1 page drawing Field of application of the invention The invention relates to a device for separating solids from liquids in a large pipeline, in particular for coarse dirt separation from the cooling water vor.den capacitors in power plant construction. Characteristic of the known technical solutions For the separation of solids from liquids in large pipes, it is known to install screens in these pipes, which collect the entrained solids. These can then be discharged via a connection in the pipeline continuously or discontinuously during operation of the system. In order to prevent complete clogging of the screen and consequent clogging of the pipeline, additional screen cleaning equipment must be installed. Such a device is described in DE-AS 2202759. For this purpose, the funnel strainer inserted into the pipeline opens with its tip into the suction line, while a shut-off flap is inserted in the front part of the open funnel. Have the sieve holes added, the suction line is opened and brought the butterfly valve in the closed position. The water should thus flow through only the sieve holes of the front Siebtrichterteiles, so that on the screen outer wall opposite the screen interior creates an overpressure. With the entering from outside into the sieve water, the dirt is released and washed away by the suction line. In addition to the additional expense of a cleaning device, a continuous rinsing process is therefore also to be carried out during operation, which significantly reduces the throughput. The obvious mistake of this cleaning device, however, is that with heavily soiled sieve and closed butterfly valve due to the small screen area enters an almost complete blocking of the pipe cross-section, causing the subsequent components come to harm. In DE-AS 2063890 a solution is described in which the sieve truncated cone inserted in the pipeline points with its tip against the flow. The discharge line opens into an annular channel which is formed in the vicinity of the Siebfußes as a pipe extension. Also, this screen body is provided with an additional flushing water pipe to avoid the clogging of the screen body and the associated complete closure of the pipeline. However, a sudden strong contamination of the water leads to rapid total blockage of the screen body and the interruption of the cooling water flow. The failure of the system or an accident of the following modules is the result. Object of the invention The invention aims to develop a device for separating solids, which on the one hand allows removal of the separated solids during operation of the system and at the same time overloading of the screen body by blockage * -bzw. an accident and thus the failure of the entire cooling water system prevented. Explanation of the essence of the invention To improve the state of the art, the invention has for its object to provide a separator, which ensures the supply of the downstream modules with cooling water even with added screen body. The solution of the task is done by a sieve combination of several individual sieves is used in the pipeline. These screens, which are arranged one after the other and cover the pipe cross-section only partially, can all. odteilsweise behaved be designed and cover labyrinthine with their directed against the flow sieve opening the free flow area of the screen presented. At the base of this sieve container a suction line is connected, and connected upstream and downstream of the screen combination Differenzdruckmeßeinrichtung monitors the degree of contamination of the sieves. Preferably, the screen combination of a plurality of axially juxtaposed, open on both sides, frustoconical, large and small screens to create. For this, the large sieve body with the small base area and the smaller following sieve body with the large base area should be set against the flow. The edge of the large base of the large screen body rests against the pipe wall.