SK1893A3 - Building system for a building of double-walls stacks and pipes for waste gases and a steam - Google Patents

Abstract

The double-walled chimney (1) having a plastic inner pipe (2) and a self-supporting stainless-steel outer pipe (3) anchored on the outer wall of a building is constructed from a base element (5), fastened on a masonry-work foundation base (7) by means of an anchoring plate (6), extension pipe portions (8), a connection pipe portion (9) for the waste-gas line of a heating boiler, and two cleanout pipe portions in the upper and lower region of the chimney (1). Base element (5), extension pipe portions (8), connection pipe portion (9) and cleanout pipe portions are composed of inner pipes (12), consisting of glass-fibre-reinforced, high-strength, acid-proof plastic, such as polyamide, which have an outer zone enriched by short glass fibres, and of outer pipes (14) consisting of stainless steel. The chimney (1) can be used to channel away the waste gases from conventional fireplaces with high waste-gas temperatures of up to 250 DEG C and from condensing heating boilers and partial-condensate heating boilers with low waste-gas temperatures of up to 60 DEG C. <IMAGE>

Description

BACKGROUND OF THE INVENTION The invention relates to a construction system for two-wall assembly of chimneys and conduits for waste gases of individual elements, with internal structure and vapor pipe connectable to a waste gas source and self-supporting outer tube of pollutant-resistant material contained in the waste gases. or for supplying combustion air to the combustion unit.

BACKGROUND OF THE INVENTION

Environmental protection regulations, which minimize the permissible emission of pollutants, in particular carbon dioxide and sulfur, into the free atmosphere from coal, gas and mineral oil installations have led to the development of new combustion techniques and associated combustion units. Heating boilers, developed by means of a new combustion technique, in particular gas, bring, by partially utilizing the condensation heat of the combustion steam and almost completely exhausting the sensible heat, i.e. the losses so far, a considerable energy saving compared to conventional heating boilers. Such utilization of waste heat by the new technique leads to a reduction of the waste gas temperatures up to 60 ° C, which are considerably lower compared to the waste gas temperatures up to 160-180 ° C. Since the waste gases of heating boilers with the new waste heat recovery technology do not reach the dew point temperature, there is a problem of increased condensate formation. In the exhaust gas ducts in which there is a negative pressure, sulfuric acid is present in combustion plants in which coal and oil are burned, which means an increased risk of corrosion in these ducts.

Double chimneys at the beginning of the aforementioned version according to DE 35 30 859 C2 with an outer concrete block jacket followed by an insulating material layer and an inner jacket consisting of a stainless steel inner tube surrounded by a spaced concentric outer stainless steel tube, also of stainless steel together with the inner tube, they form an inner casing interspace for venting, they are not suitable for waste gas outlet in installations with a new waste heat recovery technique due to the susceptibility to corrosion of stainless steel tubes caused by acid.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a construction system for the construction of double-walled exhaust gas ducts which can be used as chimneys with vacuum generated in conventional conventional furnaces with high waste gas temperatures up to 250 ° C. utilization of waste heat and with low waste gas temperatures up to 60 ° C.

SUMMARY OF THE INVENTION

The construction system for double-walled chimneys and waste gas pipelines is accomplished by assembling the individual elements, with internal structure and vapor pipe connectable to the waste gas source and self-supporting external pipe of pollutant-resistant material contained in the waste gases. or for supplying combustion air to a combustion unit, according to the invention, which consists of extension pipe pieces, connecting pipe pieces, cleaning pipe pieces and skirting elements with inner tubes of high-strength glass-fiber reinforced plastic, such as polyamide, having external zones enriched with glass fibers, and with external stainless steel pipes, sealable plastic pipe clamps for connecting the inner pipes of two pipe pieces, the pipe clamps being provided with measured by the outer longitudinal ribs as spacers for the outer and inner tubes and for centering the outer tubes on the inner tubes, and from the couplings for connecting the outer tubes of the two tubular pieces.

The building system according to the invention has the following advantages:

The building system needs only four main building elements, namely pipe extension pieces, connecting pipe pieces, cleaning pipe pieces and skirting elements with inner pipes made of high-strength plastic reinforced with fiberglass and resistant to acids such as polyamide, which have an outer zone enriched glass fiber and also with stainless steel outer pipes. The outer zone enriched with short glass fibers gives the inner plastic pipe a high mechanical strength and higher heat resistance at waste gas temperatures up to 250 ° C, so that the building system does not need to have any compensators to compensate for the heat-induced elongations.

The plastic inner tubes of the extension, connection and cleaning tubing pieces are inserted into each other by means of sealed plastic connection sleeves in a simple manner to form a longer conduit for evacuating the waste gases. Equally simply, the stainless steel inner tubes of said tubular pieces are pushed together at the ends of the inner tubes and are clamped together by means of clamping strips into a self-supporting through-flow outer tube which allows the double-walled tube to be installed as a chimney or building.

The injection sleeves made of plastic for the inner tubes of the extension, connection and cleaning tubular pieces are preferably provided with external longitudinal ribs as spacers of the outer and inner tubes, so that no separate spacers are required. Double-walled pipes, made of individual pipe pieces, can be used for vacuum chimneys for exhaust gases with high temperatures up to 250 ° C, which prevent condensate formation, in conventional furnace fireplaces and as overpressure pipelines for exhaust gases with increased condensate formation. Partial condensation boilers with low waste gas outlet temperatures up to 60 ° C, and with these partial condensation boilers, the waste gases are transported to the free atmosphere via an exhaust duct connected to the boiler outlet through a discharge pipe due to insufficient draft. In partial-condensation boilers, it is possible to create a conduit for exhaust gas exhaust only from the plastic interior of the pipe inserted into the shaft of the existing chimney, provided that the shaft has a larger cross-section and is vented.

The double-walled exhaust gas ducts made of individual elements can advantageously be used in LAS heating systems in which the combustion air is sucked from above through the cladding space between the outer and inner pipes of the combustion chamber itself and the gas flowing inside the pipe in the opposite direction. upwards, it is preheated so that a higher degree of combustion efficiency is achieved.

Exhaust gas ducts may also be used in HRA heating systems where the exhaust air from the furnace is routed through an exhaust duct arranged below the furnace ceiling to the interspace of the double-walled duct through which, due to natural buoyancy, flows from bottom to top and exits to the atmosphere. wherein the hot exhaust gases flowing downwardly from the inner pipe are cooled by the exhaust air from the furnace. Finally, the use for double-walled pipes with plastic inner pipe and stainless steel outer pipe used in ventilation and air conditioning is also possible.

BRIEF DESCRIPTION OF THE FIGURES

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a chimney constructed by the building system of the present invention; FIG. 2 is an enlarged longitudinal vertical section of a detail of the chimney of FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION

The double-walled chimney 1 for these applications consists, according to FIGS. 1-3, of an inner tube 2 of plastic and a self-supporting outer tube 3 of stainless steel which is anchored to the outer wall 4 of the building and is constructed of a plinth element 5 fastened. on the wall base plinth 7 or concrete plinth by means of anchoring plate 6, then from extension pipe pieces 8, one connecting piece 9 for connecting the boiler outlet pipe and from two cleaning pipe pieces 10 in the upper and lower part of the double wall chimney 1. closable flaps 11.

The plinth element 5, the extension pipe pieces 8, the connection pipe piece 9 and the cleaning pipe pieces 10 consist of inner tubes 12 of high-strength glass fiber reinforced plastic, such as polyamide, having outer zones 13 enriched with short glass fibers and outer tubes. 14 made of stainless steel.

The inner plastic pipe 12 and the outer stainless steel pipe 14 of the skirting element 5 and the extension pieces 13 are formed as through pipes.

F

The connection pieces 9 in the form of T-pieces consist of a plastic inner tube 12 with a welded connection socket 15 for gluing the plastic tube piece 16 for connecting the combustion unit waste pipe and a stainless steel outer tube 14 with a tube socket 17 arranged coaxially to the connection piece 15 of the inner tube 12, with the concern 18 formed as an additional tube sleeve for connecting the connecting tube or for slamming the closing lid.

The cleaning tubular pieces 10 formed as T-pieces have, in contrast to the connecting tubular pieces 9, a neck 19 with a rectangular cross section welded to the stainless steel outer tube 14, which can be closed by a flap 11 and serves to introduce the chimney brush into the inner tube 2. connected to a plinth element 5 for removing the soot removed by the chimney brush and for other types of cleaning.

The skirting element 5 consists of a base plate 21 of plastic with a central opening 22, to which a pipe 23 is guided by a base base 7 for draining rainwater and condensate from the waste gases.

Inner tube 12 of plinth element, extension tube pieces 8, connecting tube piece 9 and both scrubbing tube pieces 10 are inserted into one another by means of plastic pipe sleeves 24, for example polyamide, so as to form a continuous inner pipe 2. Plastic pipe sleeves made of plastic The injection molding materials are provided with external zebras 25, which are provided by inner tubes 12 and serve as spacers between the outer tubes 14 of the skirting element 5 and the pipe pieces 8-10 so that the inner tube 2 and the outer tube 2 of the double wall chimney 1 form an intermediate wall 26. The tubular sleeves 24 have a central inner annular extension as a stop for the ends of the two plugged inner tubes 12 and are further provided with annular grooves 28 in the end portions for accommodating the sealing rings 29 for sealing the inner tubes 12.

The ends 30,31 of the outer stainless steel tubes 14 of the plinth element 5, of the extension pieces 8,. of the connecting pipe piece 2 ^{and of the} two cleaning pipe pieces 10 form the same long coupling parts of the pipe coupling with the outer annular grooves 32. One end 30 of the stainless steel tubes 14 of the tubular pieces 5.8-10 is formed as a connection sleeve and the other end 31 of the outer tubes 14 is formed as a plug end which is reinforced by a peripheral notch 33 and the ends 30,31 of the two outer tubes 14 inserted in the height of the tubular sleeve 24 for connecting the two plastic inner tubes 12 are held against each other by a clamping band 34 which is inserted into the annular grooves 32 adjoining the connecting ends 30, 31 of the two outer tubes 14.

The double-walled chimney 1, which is constructed from one skirting element 5 and one cleaning piece 10, is further erected from individual parts, namely extension pipe pieces 8, one connecting pipe piece 2 for one heater and another cleaning pipe piece 10, is fastened to the outer wall 4 of the building by means of brackets 35.

The intervening space 26 of the double-walled chimney 1 can, as already mentioned, be connected for sucking combustion air into the combustion unit or for discharging the exhaust air from the furnace to an outlet pipe located below the furnace ceiling.

Claims (5)

A construction system for building double-wall chimneys and ducts for waste gases and vapors by assembling individual elements, with an inner pipe connectable to a waste source. gas and a self-supporting outer pipe of a material resistant to the pollutants contained in the waste gases, which forms a cladding space for venting the inner pipe or for supplying combustion air to the combustion unit, characterized in that it consists of extension pipe pieces (8), connecting pipe pieces ( 9), cleaning tubing pieces (10) and skirting elements (5) with inner tubes (12) of high strength glass fiber reinforced plastic, such as polyamide, having outer zones (13) enriched with glass fibers, and with outer tubes of stainless steel, of sealable tubular sleeves (24) of plastic for connecting the inner tubes (12) of two tubular pieces (5, 8-10), the tubular sleeves (24) being provided with external longitudinal ribs (25) as spacers for the outer and inner tubes (14, 12) and for centering the outer tubes (14) on the inner tubes tubes (12), and connectors for connecting the outer tubes (14) of the two tubular pieces (5, 8-10). Construction system according to claim 1, characterized in that the connecting pipe pieces (9) in the form of T-pieces consist of a plastic inner pipe (12) with a connecting socket (15) for the pipe piece (16) of plastic for connecting the combustion gas and the like exhaust pipe and a stainless steel outer pipe (14) with a pipe neck (17) arranged coaxial to the connection pipe (15) of the inner pipe (12), with a group (18) configured as a pipe neck; a plug-in end for connecting a connecting pipe or fitting a closing cap when used as a cleaning pipe piece (10). Building system according to Claim 1 and 2, characterized in that the ends (30, 31) of the outer tubes (14) of stainless steel of the extension pipe pieces (8), the connecting pipe pieces (9), the cleaning pipe pieces (10) and the plinth elements. (5) form the same long connecting parts of the pipe coupling with the outer annular grooves (32), and one end (30) of the outer pipe (14) of the tubular pieces (5, 8-10) is formed as a connecting socket and the other end (31) ) the outer tube (14) of the tubular pieces (5, 8-10) is formed as a plug end, and that the ends (30, 31) of the two outer tubes (14) are connected to each other at the height of the tube sleeve (24) to connect the two inner tubes (12) are held together by clamping bands (34) inserted in the outer annular grooves (32) adjacent the connecting ends (30, 31) of the two outer tubes (14). Building system according to claim 3, characterized in that the male end (31) of the outer tube (14) of the tubular pieces (5, 8-10) is provided with at least one circumferential notch for reinforcement. Building system according to one of Claims 1 to 4, characterized in that the tubular sleeves (24) are provided with one central inner annular extension (27) for connecting the inner tubes (12) of the tubular pieces (5, 8-10) as a stop for the ends of the two inserted inner tubes (12) and further annular grooves (28) in the end portions for receiving the sealing rings (29).