DD266285A1 - DEVICE FOR CARRYING OUT A POWER SUPPLY LEADER THROUGH THE CEILING OF ELECTRIC EXCAVATORS - Google Patents

Abstract

The invention relates to a device for performing a high-voltage power supply conductor through the ceiling of Elektroabscheidern. Their field of application is preferably in electrostatic precipitators, which are acted upon with an oversaturated gas-steam atmosphere, as is the case for example in the deposition of Saeurenebel and when the operating temperature is below the boiling point of the acid. The aim of the invention is to find a passage for the standing under high voltage Stromzufuehrungungsleiter through the ceiling of Elektroabscheidern, especially for Elektroabscheider the fog in the temperature range far below the boiling point of the components involved, which eliminates the aforementioned disadvantages, the functionally reliable, easy to maintain is and can be installed without difficulty in existing systems. According to the invention, the object is achieved by arranging one or more cylinders arranged one above the other on the power supply conductor and between which insulating disks, preferably made of polytetrafluoroethylene (PTFE) for sealing and electrical and thermal insulation are provided, likewise in a known manner above the power supply conductor made of PTFE existing pipe is arranged as a barrier to the electric field, which serves to avoid Überschlaegen over the surface of the insulating and thus a reduction in the distance between the power supply conductor and the cylinder is possible.

Description

For this 4 pages drawings

Field of application of the invention

The invention relates to a device for carrying out a high-voltage power supply conductor through the ceiling of Elektroabscheider ^

Their field of application is preferably in electrostatic precipitators, which are acted upon by a supersaturated gas-vapor atmosphere, as is the case for example in the deposition of acid mists and when the operating temperature is below the boiling point of the acid.

Characteristic of the known technical solutions In Elektroabscheidern is to power the spray system with high voltage to the housing insulating bushing

the power supply conductor required. These devices and their arrangements are only functional if they are kept free of conductive coverings of all kinds. The efforts to fulfill this aim in a wide variety of operating and

To solve deposition conditions, can be seen in the Vlel / ahl of the known solution proposals. There are a number of suggestions made by purging with purge gas, wherein the purge gas is heated and / or inert gas or

may be purified process gas and / or by a special design of the device to keep the unpurified process gas from the insulators.

Due to fluctuating separation conditions, this has so far only been imperfectly achieved and has led to defaults of Electric separator led. Another measure is to control the temperature of the insulators by direct or indirect heating over the Dew point temperatures of the process gas to haltrti. These solutions lead to success, wc are deposited, which in the dry state, a high specific

have electrical resistance, therefore, are poor conductors and the boiling point of the condensing Gasbestandteilen is not too high.

The disadvantage here is the required high heat output. As a further measure it is known that the functions of the carrying

and bushings isolators realized separately, in particular the mechanically loaded trough isolators before

Protect process gas. However, with this measure, the problem is only shifted to the bushings but not relinquished. In DE-AS 1801143 a device for performing a voltage conductor through the lid of the at To write down phosphorus production to use electrostatic precipitator, in which above an immersion cup an insulator

is arranged, which is designed as a cylinder and / or Isolierscheibo and under which on the

Voltage supply conductor is an insulating bushing with this parallel surface, which is from a baffle plate under Forming a lock slot is surrounded, wherein the insulator, the insulating bush and the baffle plate made of polytetrafluoroethylene

(PTFE) exists. Above the baffle plate there is a space that can be acted upon with sealing gas.

This solution has the disadvantage that also hereby the penetration of process gas and thus impurities and moisture,

which together lead to a looting coating on the surface of the insulators, in particular then can not be completely avoided if soo surfaces have a temperature which is below the boiling point of the respective condensable gas components. To achieve the required temperatures, inconveniently high heat outputs are required in most cases.

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Break through arrangements can not be used in these cases as well, since they can not be brought to the required temperatures without beating in the region of the feed.

Object of the invention

OBJECT OF THE INVENTION It is to provide a passage for the unjoint high voltage Sjomzuführungsleiter by the Deckt) of Elektroabscheider ^ Insbesondre for electrostatic precipitator the acid mist in Temperaturboreich far below the boiling point of the components involved to find, the dio eliminates the aforementioned disadvantages that works functionally reliable, is easier to maintain and can be installed without difficulty in existing systems.

Explanation of the essence of the invention

The invention is the object of the invention to provide oino device that eliminates the above-mentioned technical dallas dio, the occurrence of leakage currents in insulator by wet surfaces and voltage flashes beziohungswui :? Prevents voltage breakdowns and enables oino continuous effective · electrical separation. According to the invention, this object is achieved in that the advantages of dui chschlagonden and the non-piercing electrical insulation of bushings has been gekoppolt and the dodurc ι resulting compact insulator assembly with relatively low heat output above the boiling point of the condicable un i deposited components of Gasgomlechos and held, in that one or more superimposed cylinders are arranged on and between the insulating foils, preferably made of Polytetrnf luoräthylon (PTFE) for sealing and electrical and thermal insulation, wherein in a known manner via dom power supply a likewise made of PTFE pipe as a barrier for the electric field is arranged, which serves to avoid flashovers over the surface of the insulating disks, thereby reducing the distance between the power supply conductor and the Cyl is possible.

To avoid leakage currents and the intrinsic conduction of the insulating material, the length of the tube forming the barrier is to be selected so that it protrudes above at least half and below the entire diameter of the Isoller flaps over the last of the same. In order to keep the temperature at the boundary surfaces of the chamber facing the separator chamber above the boiling point of the condensable Gasbestandtello, the interfaces are heated directly or indirectly. To effectively insert a displacement flow, the isolator blades may be apertured.

embodiment

Dio invention will be explained in more detail with reference to an example. In the accompanying drawings show:

Flg. 1: the schematic representation of erfindungsgomäßon solution with two insulating slices in section; Fig. 2 .: the schematic representation of the solution according to the invention as in Figure 1, but with elnor third, centrally perforated insulating in section.

Fig. 3 .: the schematic D jrstellung the orfindungsgemäßon solution with an insulating in section; Flg.4 .: the schematic Γ arstellung of the solution according to the invention as in Flg. 3rd, but with a second, centrally perforated

Insulating washer in section; Fig.5 .: detail A of Fig. 1. in. Section

In the case of apron lid 1, on binom flange 2, the lower cylinder 3.1 is gas-tight and centered relative to the through-opening 4 provided in the separator cover 1. On this lower cylinder 3.1, an upper cylinder 3.2 is gas-tight and centered on a top flange 2.1 attached to the upper edge of the lower cylinder 3.1. At the upper edge of the cylinder 3.2 is also an upper flange 2.1 fastened! '. , Each of these upper flange 2.1 an annular groove 5 is arranged in which a preferably made of PTFE and the static pressure counteracting insulating β loose and thus interchangeable inserted. This insulating disc 6 is pressed by means of the lower flange 2.2, which is respectively arranged at the lower edge of the cylinder 3, in the annular groove 5 of the upper flange 2.1 and a retiort.

By means of tie rods 7 and acting on the upper flange 2.1 of the upper cylinder 8.2 pressure ring 8, the upper and lower cylinders 3 are clamped together with the oingospannte in the annular grooves 5 insulating 6.

In the insulating 6 openings 10 may be arranged to introduce an additional displacement flow openings. Around the cylinder 3 Ringhnizkörpor 11 are arranged. To avoid heat loss, this device is isolated in known Welse means of suitable materials. The power supply conductor 13, which is guided through the through openings 12, which are centrally arranged in the insulating disks 6, is encased with an insulating pipe 14 made of PTFE.

This insulating tube 14 is so long that it protrudes above at least half and below the entire diameter 15 dor cutting discs 6 on the upper or untoren edge.

In Figure 2, the clamping of a third cutting disc 6 is shown directly on the Abscheiderdecke 1. This insulating 6 can be an annular gap 16 arise, which is chosen so that in case of dew point detecles on this insulating 6 no breakdown to the power supply conductor 13 can be made.

In the figures 3 and 4 variants have been shown in which, due to lower requirements or less difficult technological conditions, only one cylinder 3 is used with the associated Trennscheibon 6 and the other required parts.

Claims (4)

\. Apparatus for passing power supply conductors of spray systems through the ceiling of electrostatic precipitators, in particular for electrostatic precipitators for the separation of acid mists using insulating washers (6) of PTFE, characterized in that the isolating disc (6) is placed in or between two or more cylinders (3) ) are clamped gas - tight but interchangeable, that this clamping takes place in a in the in the upper and at the bottom of the cylinder (3) mounted flanges (2.1, 2.2) arranged annular groove (5) that by a centrally arranged passage opening (12) in the Cutting disc (6) with a consisting of PTFE insulating tube (14) sheathed power supply conductor (13) of the spray system is performed and that between the Isolierscl discs (6) resulting chambers (9) by means of appropriately arranged known radiator (11), for example ring radiator , about your boiling point of the deposited cd nsierbaren gas components are heated out. 2. Apparatus according to claim 1, characterized in that did Isolierscheiben (6) Dom vor¬ static pressure counteracting bulging. 3. Apparatus according to claim 1, characterized in that in the lower insulating disc (6) arranged through opening (12) to an annular gap (16) is increased. 4. Apparatus according to claim 1, characterized in that the insulating discs (6) can be provided with scavenging air openings (10), is passed through the aine displacement flow.