WO2013072195A1 - Procédé de séchage d'un système de canalisation - Google Patents

Procédé de séchage d'un système de canalisation Download PDF

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Publication number
WO2013072195A1
WO2013072195A1 PCT/EP2012/071569 EP2012071569W WO2013072195A1 WO 2013072195 A1 WO2013072195 A1 WO 2013072195A1 EP 2012071569 W EP2012071569 W EP 2012071569W WO 2013072195 A1 WO2013072195 A1 WO 2013072195A1
Authority
WO
WIPO (PCT)
Prior art keywords
suction fan
drying
pipe
operating time
valve
Prior art date
Application number
PCT/EP2012/071569
Other languages
German (de)
English (en)
Inventor
Steffen SCHLENKER
Lars KAULFUSS
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2013072195A1 publication Critical patent/WO2013072195A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/035—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid

Definitions

  • the invention relates to a method for drying a pipeline system in an industrial plant.
  • Amounts of flow medium usually according to conditioned water in the various components such as steam generator, turbine etc. initiated. Especially here piping systems must be designed pressure stable.
  • fittings such as measuring orifices, sieves, filters, etc.
  • valves such as shut-off valves, shut-off slide, check valves, etc.
  • delays sometimes result in the need to dry the piping system or individual piping of the system after a pressure test or watering.
  • the object of the invention is therefore to provide a method for drying a piping system in an industrial plant, which allows reliable drying of a pipe, in particular with fittings contained in a short time with relatively little technical effort.
  • a pipe of the piping system is provided on the input side with an air inlet and the output side, a suction fan is connected, wherein the suction fan is operated to dry the pipe.
  • the invention is based on the consideration that physically fundamentally different possibilities exist for drying a pipeline: evaporation, temperature increase below the boiling point and mass transport as a result of the concentration gradient at the interface, increase in temperature and reduction of the relative humidity to increase this concentration gradient and increase the air mass flow To increase the mass transfer coefficient. It has surprisingly been found by extensive and expensive experiments that the use of a suction fan allows complete removal of residual fluid without disassembly. The considerable increase in the air mass flow through the suction fan creates turbulence on the surface of the fluid. These improve on the one hand the mass transfer into the air, on the other hand, the strong air flow entrains fluid that precipitates on the pipe inner wall and wets them. Thus, the total fluid surface increases, which further accelerates the mass transfer into the air. This allows drying within a comparatively short time.
  • the pipeline for controlling and controlling the process parameters comprises one or more valves.
  • the drying is particularly difficult.
  • the tube inner wall here typically has edges, indentations and other structures that are in the The following generalization be referred to as fitting pockets. Fluid can accumulate in the fitting pockets, so that not only a film which wets the pipe wall but also a considerable fluid accumulation filling the respective valve pocket is to be dried, ie to be removed.
  • the inventive method has the advantage of easy to dry the area of the fitting pockets.
  • the pipeline is arranged horizontally and / or the valve arranged vertically.
  • the use of a suction fan is particularly effective, since in some other geometric arrangement, the fitting may cover the water surface in large parts under certain circumstances. This reduces the air flow at the water surface.
  • the valve is at least partially closed during part of the operating time of the suction fan.
  • the associated reduction in the pipe cross-section increases the speed of the air flow and thus improves the mass transfer to the air, which accelerates drying.
  • a fluid volume in the pipeline is determined prior to operation of the suction fan and, depending on the determined fluid volume, the operating time of the Suction fan selected.
  • the duration of the drying process can be estimated very well by this formula. The formula therefore offers a particularly simple way of predicting and planning the drying time.
  • the suction fan is designed in such a way that an air speed of more than 7 m / s, preferably more than 26 m / s, is established during the operating time in the pipeline.
  • an air speed of more than 7 m / s, preferably more than 26 m / s is established during the operating time in the pipeline.
  • the turbulences that form on the water surface are particularly suitable for achieving a rapid drying process through water discharge and the associated enlargement of the water surface.
  • dry air is introduced into the pipeline during and / or after the operating time of the suction fan.
  • the dry air has a significantly lower humidity, z. B. 11 to 12% and is provided by appropriate air dryers. In this way, any residual moisture can be reliably removed in dead space areas that are not detected by the turbulence of the suction air.
  • the advantages achieved by the invention are, in particular, that the use of a suction fan for removing fluid residues in a piping system a particularly rapid drying of the relevant pipe is made possible, especially if this includes a valve with the corresponding fitting pockets. Due to the high air velocities on the water surface, turbulence, which allow drying in a particularly fast time with technically comparatively simple means. In addition, the suction fan and other contaminants such. As by sanding dust, chips, welding wires, slag, etc., thus enabling a simultaneous cleaning of the pipeline.
  • FIG. 1 shows a circuit diagram of a pipeline system in which the method according to the invention is carried out
  • FIG. 2 shows a cross-sectional drawing of a wedge plate shut-off valve from the piping system of FIG. 1
  • the piping system 1 according to FIG 1 shows only a section of the entire pipeline system of an industrial plant, in the embodiment of FIG 1 of a nuclear power plant.
  • the piping system 1 is used in the operating state of the power plant of the line of vaporizable fluid.
  • the piping system 1 comprises a fitting 2, here a wedge plate gate valve.
  • the wedge plate gate valve is designed for the nominal diameter DN 300 and has a total mass of 1500 kg including actuating motor.
  • the armature 2 is arranged in a vertical position in a horizontal piping system.
  • the valve 2, a check valve 4, a branch 6 and another check valve 8 are connected in the piping system 1.
  • Dier fitting 2 is shown in the enlarged view in FIG. 2 shows the structure of the wedge plate gate valve.
  • the pipe 10 should be closed by the wedge plate gate valve.
  • the fitting 2 has a wedge plate 12 which completely closes the pipe 10 in the closed state (shown in FIG. 2).
  • the armature 2 further includes a respective actuating mechanism 14 which includes motor, transmission, etc., but the detailed function of which is immaterial to the understanding of the method.
  • the pipe 10 on the opposite side of the actuating mechanism 14 on a bulge the so-called fitting pocket 16.
  • the pipe 10 is pressure-tight.
  • the pipeline system 1 is now already used during the construction phase or commissioning of the power plant, for example, watered for test purposes or subjected to a pressure test. After these test phases, it is often necessary to re-dry the piping system 1. Particularly problematic here are the areas of the instrument pockets 16 in which fluid collects, represented by the water level 20 in FIG. 2.
  • a suction fan 18 is connected to the piping system 1, shown in FIG 1 to the check valve 8.
  • the valve 2 is preceded by an air inlet 22, which provides the air supply to the piping system 1 and suction fan 18.
  • the fitting pocket 16 is filled with 2.5 liters of deionized water.
  • an air volume flow of 6913 cubic meters per hour is established, which, with a nominal pipe diameter of DN 300 speed of 26 m / s corresponds.
  • the suction fan 18 has a power consumption of 14.4 kW.
  • the humidity outside the piping system 1 is 35% at a temperature of 22.4 ° C.
  • valve 2 After about 1/3 of the operating time of the suction fan 18, the valve 2 is closed to about 70%. As a result, stronger turbulence forms on the water level 20 and water is also discharged in the dead space areas 24 (see FIG. 2) of the fitting pocket 16. After only 1 minute, only residual moisture is left.
  • valve 2 After approx. 2/3 of the operating time, the valve 2 is closed at approx. 90%. As a result, even the edge areas of
  • Valve pocket 16 dried. After about 35 minutes of operation of the suction fan 18, the fitting pocket 16 is completely dried. This corresponds to a drying rate of 14 minutes per liter.
  • the drying time can be shortened by additional application of dry air at the air inlet 22 again. To illustrate the method described was the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un procédé de séchage d'un système de canalisation. L'invention vise à proposer un procédé de séchage d'un système de canalisation (1) d'une installation industrielle qui permette un séchage fiable d'une canalisation, en particulier d'une canalisation contenant des robinets, rapidement et tout en réduisant la complexité technique. A cet effet, une canalisation (10) du système de canalisation (1) est munie d'une entrée d'air (22) côté entrée et une soufflerie d'aspiration (18) est raccordée côté sortie, la soufflerie d'aspiration (18) ayant pour fonction de sécher la canalisation (10).
PCT/EP2012/071569 2011-11-17 2012-10-31 Procédé de séchage d'un système de canalisation WO2013072195A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110086578 DE102011086578A1 (de) 2011-11-17 2011-11-17 Verfahren zur Trocknung eines Rohrleitungssystems
DE102011086578.0 2011-11-17

Publications (1)

Publication Number Publication Date
WO2013072195A1 true WO2013072195A1 (fr) 2013-05-23

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PCT/EP2012/071569 WO2013072195A1 (fr) 2011-11-17 2012-10-31 Procédé de séchage d'un système de canalisation

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DE (1) DE102011086578A1 (fr)
WO (1) WO2013072195A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106311686A (zh) * 2015-09-09 2017-01-11 无锡亮慧环保机械有限公司 环保设备的废气净化管
CN106322109A (zh) * 2015-09-30 2017-01-11 无锡威胜环保设备制造有限公司 基于定时超声波除尘的废气输送管
CN106247165A (zh) * 2015-09-30 2016-12-21 无锡威胜环保设备制造有限公司 新型废气静电净化输送管
CN106322108A (zh) * 2015-09-30 2017-01-11 无锡威胜环保设备制造有限公司 带静电处理的废气输送管

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170226A2 (fr) * 1984-08-03 1986-02-05 Energietechnik Steinhaus GmbH Procédé et dispositif pour le nettoyage et/ou le séchage des parois intérieures de pipe-lines
DE3713396A1 (de) * 1987-04-21 1988-11-10 Siemens Ag Verfahren zum reinigen von behaeltern, rohrleitungssystemen und komponenten
WO1999029470A1 (fr) * 1997-12-05 1999-06-17 Jens Werner Kipp Procede de grenaillage pour le nettoyage de canalisations
DE102005006225B3 (de) * 2005-02-10 2006-01-19 Fachhochschule Lübeck Körperschaft des öffentlichen Rechts Verfahren zur Entfernung von Inkrustationen aus Rohrleitungen
WO2010041116A1 (fr) * 2008-10-06 2010-04-15 Bazzica Engineering Di Carlo Bazzica & C. S.A.S. Procédé de changement de matériau dans une machine de moulage de mousse plastique et machine de moulage mettant en œuvre ledit procédé
AT12131U1 (de) * 2010-07-09 2011-11-15 Glogar Holding Gmbh Verfahren und vorrichtung zum reinigen eines abgelängten hydraulikschlauchs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444882A1 (fr) * 1978-12-18 1980-07-18 Pipeline Service Sa Procede de sechage et de mise en gaz sous vide de canalisations

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170226A2 (fr) * 1984-08-03 1986-02-05 Energietechnik Steinhaus GmbH Procédé et dispositif pour le nettoyage et/ou le séchage des parois intérieures de pipe-lines
DE3713396A1 (de) * 1987-04-21 1988-11-10 Siemens Ag Verfahren zum reinigen von behaeltern, rohrleitungssystemen und komponenten
WO1999029470A1 (fr) * 1997-12-05 1999-06-17 Jens Werner Kipp Procede de grenaillage pour le nettoyage de canalisations
DE102005006225B3 (de) * 2005-02-10 2006-01-19 Fachhochschule Lübeck Körperschaft des öffentlichen Rechts Verfahren zur Entfernung von Inkrustationen aus Rohrleitungen
WO2010041116A1 (fr) * 2008-10-06 2010-04-15 Bazzica Engineering Di Carlo Bazzica & C. S.A.S. Procédé de changement de matériau dans une machine de moulage de mousse plastique et machine de moulage mettant en œuvre ledit procédé
AT12131U1 (de) * 2010-07-09 2011-11-15 Glogar Holding Gmbh Verfahren und vorrichtung zum reinigen eines abgelängten hydraulikschlauchs

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