DE202008014349U1 - Self-cleaning heat exchanger - Google Patents

Abstract

Self-cleaning heat exchangers (1) usually from a jacket tube (1a), tube bundles (2, 5), tube sheets (10) and dished ends for the end Conclusion as well as openings for the Media inlet and outlet (3, 16), being in central position in the Interior of a particular cylindrical self-cleaning heat exchanger (1) a spindle (6) is located on the translational forward and regression a pressure or plastic pressure disc (4, 7, 9 and 18) arranged is, while a variety of pipe openings (13) for the pipes the tube bundle (2, 5) and additionally one or more openings (8, 19) to minimize the media jam possesses and the spindle (6) about a geared motor (20) located outside the self-cleaning heat exchanger (1) is driven.

Description

The The invention relates to a self-cleaning heat exchanger.

heat exchangers become the use of residual energy in many areas of engineering used and in the present configuration essential for concentration of acids, Alkalis, saline solutions, Electrolytes, alcohols, digestate as well as other suitable fluids.

It is known to be liquid Media influencing technological / procedural Processes coincide with other media and / or reactions are exposed to decrease in their initial concentration. she are then for a continuous circulation, which has a corresponding final result in a method is no longer suitable.

To this purpose must these liquid media either replaced or by a reconditioning, in one known concentration, prepared for re-processing become.

The Concentration is usually carried out by means of Heat exchangers.

These consist of a container, in this case made of stainless steel or other corrosion-resistant alloys, being in the container a defined number of tube bundles is positioned, which superheated steam or other liquid or gaseous Media for heat exchange with the streaming past them liquid Bring medium to be concentrated.

The z. B. cylindrical Heat exchangers can do this one lying or one standing, the latter connected to a pedestal, To take position.

Of the Throughput of liquid, However, to be concentrated medium deteriorates during the Operation of the heat exchanger, by being on its wall inside, on the pipes and / or settle solids at its bottom, thereby increasing the heat transfer from the pipes of the heat exchanger to the passing liquid Medium to be concentrated on, uneconomical over time decreases.

The The consequence is that downtimes of such systems are scheduled at regular intervals have to, thus a fundamental Cleaning the heat exchanger can be made and, where appropriate, the existing pipes in it can be exchanged.

Out the patent and technical literature are so far no known solutions to the longer, as commonplace, Use of a heat exchanger used for concentration contribute.

Therefore must look for a solution with a reasonable degree of non-excludable downtime the service life of heat exchangers, the liquid for concentration Media is used, is noticeably extended.

It Thus, the object of the invention is to develop a heat exchanger in such a way that in him a device is integrated, the aufkonzentrierende liquid Medium in and contrary to its throughput direction of a constant turbulence subjected, so under low energy and device technical Effort a blocking of the heat exchanger is avoided and shutdown times to its overhaul / cleaning in longer cycles can be provided.

According to the invention Task solved as follows, being with regard to the fundamental inventive thought up the protection claim 1 is referenced.

The Further embodiment of the invention results from the protection claims 2 to 5th

The following supplementary Hints for inventive teaching are required.

Of the self-cleaning heat exchangers has a novel design one made of plastic or more Webs made of metal and the inner diameter of the heat exchanger adapted thrust washer, the motor continuously movable the inner wall of the heat exchanger and along the tube bundle / s slidably arranged. To overcome the flow pressure in flowing Movement and unidirectional liquid medium and avoidance mechanical deformations, the pressure plate has a defined Thickness as well as an additional larger recess next to the openings for the Tubes of one or more tube bundles / -el.

The openings for the Tubes in the thrust washer also have cylindrical bearings with a defined play, so that a tilting of the thrust washer, the can also consist of several webs, virtually impossible is.

A plurality of thrust washers may be present in a heat exchanger several times in succession over several sections thereof, all of these thrust washers via a centrally located thrust rod or spindle from the outside mo be moved in sync toric. According to the tubes contained in the interior of the heat exchanger, the construction of a thrust washer is provided such that due to successive multiple webs and thus a larger Lagergleitfläche, a tilting of these pressure plates does not take place.

The bearing liners are provided with a game sleeves - especially plastic consisting of - the in the openings for the Tubes are located in the pressure discs, formed.

The Invention will now be explained in more detail with reference to an embodiment.

The individual figures show:

1 : Illustration of the self-cleaning heat exchanger in longitudinal section AA

2 Photos: Top view from above

3 : open self-cleaning heat exchanger - without jacket tube - with representation of the pressure disc

4 : Representation of a pressure disc, consisting of 2 bars, on the open heat exchanger - perspective view

The in the 1 to 4 used reference numerals can be found in their meaning of the list of reference numerals.

The self-cleaning heat exchanger 1 consists of a jacket tube 1a , one or more tube bundles / n 2 . 5 , Tube sheets 10 and from the dished ends closing it on both sides (not positioned closer) and the device according to the invention for continuous cleaning, which is located in its interior and will be described in more detail below.

According to 1 is in the middle position of the self-cleaning heat exchanger 1 a spindle 6 to recognize that in the tube sheets 10 is stored or guided. It is externally by means of a geared motor 20 set in motion using a pressure washer 4 . 7 . 9 - Here shown in 3 essential positions - is carried along and along the perimeters of all tubes of the tube bundle 2 . 5 slides. This sliding movement takes place constantly in a forward and backward movement up to the corresponding reversing positions, which by a corresponding control of the geared motor 20 is realized. To minimize the expenditure of force in overcoming the medium internal pressure during the aforementioned movements, the webs contain 11 the pressure disk 4 . 7 . 9 openings 8th through which the medium to be concentrated can pass. The bridges 11 be through spacers 12 fixed in their position. The bridges 11 also have a plurality of tube openings 13 , in which plastic sleeves 14 integrated, in direct sliding contact with the tubes of the tube bundle 2 . 5 stand. The plastic sleeves 14 are defined angularly movable, so that tilting of 2 or more webs 11 known pressure disk 4 . 7 . 9 during their translations and when thermal stresses occur in the metallic materials.

Out 2 it can be seen that the self-cleaning heat exchanger 1 vertically in a stand 17 is installed.

With 13 becomes an open, without casing pipe 1a with a plastic pressure disk 18 equipped self-cleaning heat exchanger 1 shown. The plastic pressure disk 18 has a defined thickness, which prevents tilting and at least one opening 19 to minimize the media jam. You, the plastic pressure disk 18 , fulfills the same function as a pressure washer 4 . 7 . 9 , which consists of successively arranged webs 11 consists.

• – höhere Einsatzbereitschaft, d. h. verlängerte Standzeit von Verdampfern/Wärmetauschern,
• – verringerter Einsatz von Reparaturmaterialien,
• – nur geringe Leistungsaufnahme des verwendeten Getriebemotors erforderlich,
• – vielfältige Anwendung in Biogasanlagen gegeben. Hier sollen Gärreste weiter entwässert und später als Dünger verwendet werden; dabei werden schnell einsetzende Verkrustungen unterbunden,
• – Vermeidung der Verwendung von Reinigungschemikalien,
• – Vermeidung von manuellen Reinigungsarbeiten.

The advantages and fields of application of the invention can be summarized as follows:

• - higher operational readiness, ie extended service life of evaporators / heat exchangers,
• - reduced use of repair materials,
• - only low power consumption of the geared motor required,
• - Varied application in biogas plants given. Here, digestate is to be further dehydrated and later used as fertilizer; while fast onset encrustations are prevented,
• - avoiding the use of cleaning chemicals,
• - Avoid manual cleaning.

1

self-cleaning heat exchanger

1a

casing pipe

2

tube bundle

3

media feed

4

thrust washer (Starting position)

5

tube bundle

6

spindle

7

thrust washer (Center position)

8th

Opening to Minimizing the media jam

9

thrust washer (End position)

10

tube sheet

11

web

12

spacer

13

tube opening

14

Plastic sleeve

15

web

16

medium deduction

17

installing stands

18

Plastic thrust washer

19

Opening to Minimizing the media jam

20

gearmotor (not closer shown)

Claims (5)

Self-cleaning heat exchanger ( 1 ) usually consisting of a jacket tube ( 1a ), Tube bundles ( 2 . 5 ), Tube sheets ( 10 ) and ends for the end closure and openings for the media inlet and outlet ( 3 . 16 ), wherein in a central position in the interior of a particular cylindrical self-cleaning heat exchanger ( 1 ) a spindle ( 6 ), on the in translational forward and backward movement of a pressure or plastic pressure plate ( 4 . 7 . 9 respectively. 18 ), while a plurality of tube openings ( 13 ) for the tubes of the tube bundles ( 2 . 5 ) and additionally one or more openings ( 8th . 19 ) to minimize the media jam and the spindle ( 6 ) via a geared motor ( 20 ) located outside the self-cleaning heat exchanger ( 1 ) is driven. Self-cleaning heat exchanger ( 1 ) according to claim 1, characterized in that the pressure disc ( 4 . 7 . 9 ) of at least 2 metallic webs ( 11 . 15 ) consists. Self-cleaning heat exchanger ( 1 ) according to claims 1 and 2, characterized in that between the tube openings ( 13 ) in the webs ( 11 . 15 ) of the pressure disk ( 4 . 7 . 9 ) Plastic sleeves ( 14 ) are used with their inner diameter surface contact with the tubes of the tube bundles ( 2 . 5 ) produce. Self-cleaning heat exchanger ( 1 ) according to claim 3, characterized in that the plastic sleeves ( 14 ) with defined play in the tube openings ( 13 ) are stored. Self-cleaning heat exchanger ( 1 ) according to claim 1, characterized in that the plastic pressure disk ( 18 ) is dimensioned in its thickness such that tilting during its translational movement on the tubes of the tube bundles ( 2 . 5 ) is omitted.