DD145476A3 - DEVICE FOR CLEANING HEAT TRANSFER - Google Patents

Abstract

The invention relates to a device for cleaning of heat exchangers, in particular of Brennkammerheizflachen in steam generators, with a blowpipe with-a guide over Movement elements with a®. Drive is connected and the blow jet the blowing tube opposite the surface to be cleaned performs circle-like movements. To achieve a constant Residence times for the blowing jet per to be cleaned Area unit according to the invention, the guide parallel to the arranged cleaning surface and the blowpipe over a Guide rod is loosely guided in the guide and that the Movement elements with a one the diameter ratios the movements adapted linear rising or falling Speed-connected drive are connected. This will achieved that the distances between the diameters of the Movements with increasing diameter are constant and the Movements a constant speed ', respectively, an equal one Have off-take or take off. - Figure -

Description

-Even invention Yorrielxtüng for cleaning heat exchangers

Field of application of the invention

The invention relates to a "device for cleaning Wärmeübertragerax, especially of Berts nnkammerheizflachen in steam generators.

Characteristic of the known technical solutions

BS έ ± τΛ Apparatus (hereinafter referred to as sootblowers) for the purification of slab heating surfaces known to steam and ash slag generators by means of air, steam and water jet. The ianzenfö'rmigen sootblower drive through a hole in the combustion chamber, and "f Obren .'beim cleaning spiro ζ e ß a rotational movement about its axis, so that ,, ,, ^ backward to infairsbewegung a lying concentric to the surface sootblower sootblower "known, ctors'n blowhead '.'mehrere. Nozzles »All of these types of sootblowers enter the combustion chamber and clean a relatively small (rear) hot surface section. Soot blowers were WeiterMn known in which with the help of one or mekrer-he drives the superposition of a horizontal and vertical Bev egsuag ^': and the cleaning of combustion chambers opposite © i ζ area took place. In these blasting fans, the cleaning movement is carried out in the "belt-shaped bawbic-like" form, so that the basic shape of the cleaning person is right, but this is more or less strongly distorted due to the different wall thicknesses of the wall surfaces. Hiörbei is in the reversal points of the

; As a result of the changeover times of the drive, the distance of the cleaning smeia is considerably longer than that of the Gervadoso, that there is a high level of heat shock

Damage (cracking) of Rohririaterials, especially in Membranwandheizflachen cause. Increasing the speed of movement, on the other hand, would considerably reduce the cleaning effect ». '· «>; :. -: -: .,.

To avoid these disadvantages, it is also known to form the drive of the soot blower so that the blowpipe performs a spiral movement on the surface to be cleaned. However, this soot blower is suitable only for IeIeinen surfaces to be cleaned, as with large areas to be cleaned with the cleaning effect As the diameter increases, it becomes smaller and smaller. In contrast, occurs when the diameter becomes smaller, a high shock and wear effect, in addition, the distance of the cleaning jets increases with increasing diameter, so that the Beinigungseffekt continues to decrease.

Object of the invention

The aim of the invention is sootblowers for combustion chamber heating surfaces _f, in particular for Meiabranwandhelzflachen, with a relatively simple drive, which causes no locally stronger thermal stress during the cleaning process. In addition, the shape of the krsisforntähnlichen movement for the surfaces to be cleaned should be adjustable. - ' ^::

Explanation of the essence of the invention

The object of the invention is to provide a device for cleaning steam cleaner surfaces, in which the blow jet on the opposite side. Heizfläche the cleaning figures vozi circles, v / elche skip each other, spiral or involute or similar circular movements with the respective diameter and figure matched speed executes. In addition, the device should be designed so that the residence time of the blowing jet per unit area is constant ». This is achieved in that according to the invention the guide is arranged parallel to the surface to be cleaned and the blowpipe is loosely guided in the guide via a guide rail and that the moving elements have a linearly increasing or decreasing speed adapted to one of the razor ratios of the movements. Drive are connected, such that the distances between the Burchmes- 'sera -.der'- .Wewegungen with increasing diameter are constant and the

Movements have a constant speed or a same Wegzuoder.-decrease .. show, so that the residence time of the blowing jet per unit area to be cleaned is constant. As a guide guided in a driven by the shaft of the drive lever and vozi a chain moving sliding block is provided, Tiobei the chain with a fixed and a movable gear and the fixed gear is connected to your lever or a joint is provided as a guide » in which a lever guided loosely in a spindle and a lever moved by a driver driven via the shaft of the drive is articulated ·

Furthermore, as a guide, a template is provided and the guide rod 'is connected to a driven via the shaft of the drive fork. One or more curves are arranged on the shaft of the drive or the roller of the drive is rigidly connected to a lever to whose bearing a rocker arm is articulated »The blower tube can be moved in and out in the wall of the heat exchanger The blower tube is furthermore also arranged pivotably in the wall of the heat exchanger, the blowpipe being connected to the wall of the heat exchanger via a movable collar And in the area, the-wall of .Wärmmeübertragers cooled.

ÄusfüiirungebeiSpiel

Anhanä. of Ausführungsboispielen shown in the drawing, the invention will be explained in more detail

 The drawing shows

Fig. 1: the overall arrangement of the blow pipe with Gleitsteinführung in principle;

Fig. 2: the Evelventenföraigen movement sequence of the blowing jet on the heating surface of FIG. 1;

Fig. 3: the drive for an elliptical motion with cam discs in principle

Fig. 4: the drive for an elliptical Bev / eevierungsablauf with rocking levers in principle;

FIG. 5 shows the elliptical motion sequence of the blow jet according to FIGS. 3 and 4; FIG.

Pig · δ: a section according to Fig. 4;

- -. "-, ijg

Pig · 7: the storage of Blaskopfe sj with cooling in principle;

8: the swing-in bearing of the blow head in the prin-

Pig · 9: the total arrangement of the blow head with lever joint contact in principle;

Pig, 10ί the overall arrangement of the blow head with fork joint Pührang in principle;

Pig · 11: the overall order of the die with the die touch

Principle ι,

Pig · 12: the template for an involute motion in principle,

According to Pig · 1j 9j 10 and It i.st the blowpipe 1 in the Brsnnkammerwand sowofel in the work as such rest position with the fan head 3 stored so that during the Bettle bsphase angle changes in two levels are possible »The drive is Bußbläserbewagung means a drive 4 »which is continuously speed-controlled by means of an actuator» According to Pig. 1, the shaft 7, which is fixedly connected to the lever 8, is driven by means of toothed wheels 5 and 6 · Ar. This lever 8, two gears are attached. The Zslmrad 9 is rigid while the Zahnred 10 is rotatably mounted in the lever 8. Over both gears runs the chain 11, on which a sliding block 12 is fixed, which slides in the direction of the lever 8 · Ber sliding block is connected to the blowpipe 1 »The supply of the islasmittels takes place via the flexible hose 13« The chain Tt usxä , the gear 10 are by eino on the gear 9 abdrehende lever 8 guided rack with sliding block 12 replaceable. According to Pig. 3 are arranged with the shaft 7 via Pührungen 22 firmly connected Kurverseheiben 23 which are supported on the support 24. According to Pig. 4 ead β are rigidly connected to the shaft 7 lever 25 and on the support 24 are swing lever 2β supported Ao Zehnrad 6 is a fixedly mounted articulated lever 20 is arranged (Pig. 9). On the rigid spindle 14- the lever 15 ₃ of the inner bush 16 is movably connected to the spindle H. and takes over the Pührungs- • rod 18 for the blowpipe 1 in the joint 17, arranged * on Zaiuorad 6 is also the driver The bearing of the fan head 3 in the region of the tube wall 2 is stationary (FIGS. 1 and 7) or on and off

-J-

susscbsringbar (Pig, 8) arranged. The fan head 3 is mounted on the worm spindle 35, which is arranged outside the spindle 32. On the spindle 32, control rings 33 are arranged, which are connected via stops 34 to the blades 37 or the fingers 36. The arrangement of Blä-3 in the opening is by springs 29 (Pig · 1) or by means of

40 (Pig * 7) guaranteed. The fan head 3 has channels in the area of the stop of the fan head 3 in the opening or in the ball joint 40 or in its guide; The fan head 3 is connected to dsr ^ movable sleeve 31 (Pig x 1) · The Pührungsstange the blow tube 1 is further nen in a mask 38 having disposed Führungsbah- 4-3 and out of a driven shaft 7 by the fork 39 (Fig. 11 and 12) ·. '.

The mode of action is the following:

The blowing head 3 of the blower tube 1 is fixedly mounted in the opening of the wall 2 and held by the springs 29 (FIG. 1). To seal the opening; "in the tube wall 2 JLst the blowpipe 1 connected via the sleeve 31 Bit dar pipe wall 2, so that dust and False-Airbeaufschlagfegeai be avoided.

• Bid Kihru2ig = sstange 18 of the blower tube 1 is loosely mounted .im-sliding block 12 (Fig. 1 and 2} and shifts in the leadership of the aborted He'bals, 8 by the chain 11 is operated during &&r rotational movement »the tjherlagerung With respect to movements, the blower tube 1 executes an involute movement 27 (Figure 2) .The overload ratio between motor 4 and shaft 7 and gear 9 and chain 11 LaVSf., the rotor number is selected so that the cleaning

"stxabX always has the same motion velocity along its working path. The number dei? Rotational movements of the shaft is aimed table of size to be cleaned Brennkaminerheizflache. In this case, the distance between the bijets on the surface to be cleaned the Wegzunahme or Visgabnahme the blow jet regardless of

.Bureisnesser constant, so that the residence time of the Blasstrahles per ssi purifying Flächeneinhext also irrespective of the diameter con ¬. 6 · ΐΒβ.ΐ "is. · Thereby the shock or Verschlaißwirkung.en

If the ball is seen with the cam disks 23 (FIG. 3) or with the rocking levers 2β (FIGS. 4 and 6), then the sliding block 12 describes the shaft-shaped elliptical movement figure 28 of the shaft 7

If the toothed wheel 6 is provided with the driver 19 and the oscillating lever 20, and the lever 15 or the fork 21 is presented on the spindle 14 (FIGS. 9 and 10), the angle γ and therefore the joint 17 change during rotation.

The blowpipe 1 leads feditsgt by the loose guidance of the guide rod 18 in the joint 17 according to the transmission ratio of the lever 15; 20 and the pitch of the spindle 14 an eve1venten- to spiral movement of · ·

If the guide rod 18 ± n of the template probe 38 (Fig. 11 and 12) out, the Führungsbafanen 41 in the template any motion figure 27 27; 28 represent the blow pipe 1 during rotation by the driven fork 39, these movements, so that the su cleaning surface is coated with the blow jet according to the templates ·

Again, the distance between the blowing jets and by the speed-controlled drive the Wegzu- or -abnähme kept constant, so that the residence time of the blow jet per unit area to be cleaned is also constant regardless of diameter «is the blower tube on and swung arranged (Fig. 8), this movement takes place via the spindle 32 driven by the drive 4 and the worm wheel 35. The pivoting movement of the blower tube 1, the blowing medium valve 37 and / or the hatch 36 can be controlled by the control rings 33 arranged on the spindle 32 · If the fan head 3 i ^ of the hatch is not arranged to swing in and out (FIGS. 1 and 7) », then adequate cooling must be provided. The cooling medium, eg air, is introduced via the channels 30 in the fan head 3, in the ball joint 40 and in the region of the wall 2 (FIG. 7). The cooling medium is constantly sucked in by the negative pressure in the combustion chamber in the case of a steam generator that the thermally stressed parts of Blä3erkopfes 1 and its bearings is cooled · -

The following advantages can be achieved by the invention:

1 »High cleaning effect due to the movement of the blowing jet on the surface to be cleaned, adapted to the external conditions

2 »Adjustment of the movement sequence to the shape of the surface to be cleaned«,

3, adjustability of the speed of movement * 4 * avoid School: - »and Yersch-leip *

Claims (2)

Claim for entitlement * ... '· Cleaning of heat exchangers, in particular of breccellar heating surfaces in steam generators, wherein a blowpipe is connected to a guide via moving elements to a drive and the blowing jet carries out circular-shaped movements on the surface opposite the blowpipe to be cleaned, characterized by that the guide is arranged parallel to the surface to be cleaned and the blowpipe over il © Pührungsstange loose .in the guide is guided and that the moving elements are connected to a the diameter ratios of the movements adapted linear tending or falling speed having drive, such that the Distances between the diameters of the movements with increasing diameter are constant and the movements have a * constant speed or »a same Wegau- or Abnähme, so that the residence time of the blowing jet per unit area to be cleaned is constant. Direction according to point I _9, characterized in that a guide is provided in a sliding lever driven by a chain and driven by a chain driven by the drive of the drive, the chain comprising a fixed gear and a moving gear xmd the fixed gear connected to the lever. Device according to point 1 », characterized in that a joint is provided as a guide on which a lever guided loosely in a spindle and of a. a driven via the shaft of the drive driver bewegter- lever is articulated. 4 · Device according to Funkt T, characterized in that as a guide, a template is provided and the guide rod is connected to a driven over • äie shaft of the drive fork. Device according to point 2 », characterized in that one or more cam corners are arranged on the shaft of the drive. .6. Gate direction according to Item 3 _9, characterized in that the shaft of the drive is rigidly connected to a lever to which a bearing has reached a rocking lever « Bat 7 · Gate direction according to point I ₃ , -gekennzeichnet in that the blowpipe is arranged retractable and extendable in the wall of the heat exchanger. 8. gate direction according to point T ₃ , characterized in that the blowpipe is connected via a worm wheel with a driven by the shaft of the drive control spindle having control rings · 9 "gate direction according to point 1", characterized in that the blowpipe is arranged .schwenkbar in the wall of the heat exchanger · 10O device according to item T or 9 characterized in that the
Blow pipe is connected to the wall of the heat exchanger via a movable sleeve » 11.Torrichtung according to point t »characterized in that the blowpipe is cooled in the region of the wall of the heat exchanger. For this ..... ^ ... pages drawings