FI94172B - District heating transfer device - Google Patents

Description

94172

District heat transfer device

The invention relates to an apparatus for transferring district heat to a heating and / or water heating apparatus, wherein heat is transferred from one primary heating system used to circulate one medium to another, at least partially circulated to a controlled secondary system via a circulating pump, and comprising at least one volume control device and one heat exchanger, 10 at least two vertical and parallel spaced wires connected to each other by at least one transverse beam and acting as a support structure for the components of the transmission device.

Such devices are used as a transmission station and a heating center for space heating and / or water heating, with district heating then acting as the main energy source. In conventional devices, the pipelines are connected both to each other and also to the piping devices and control and measuring parts in the area of the transfer station and the house center, mainly by flanges. The pipelines and operating components of the transfer station have often been installed individually and according to the facilities available at the time, which has resulted in considerable installation costs as well as relatively high plant costs for a complete remote heat transfer station. Indeed, high connection costs have often been the reason why the benefits of district heating have not yet been sufficiently exploited.

EP-A-0 092 032 discloses a device of the type mentioned at the outset, in which at least two vertical and parallel spaced wires are connected to one another by at least one flow-through crossbar. The support structure is made in one piece by pressure or gray casting and consists of a quadrangular network of pipes. Pipelines connected to the connections of the primary heating system or the like of a heating and / or water heating system 94172 ί 2 do not have any support function.

Separation of the primary heating system used in one medium cycle to the secondary heating system used in the second medium cycle is only possible by means of two known known support structures. It is therefore an object of the present invention to provide a device whose support structure is particularly simple and suitable for both free-standing and wall mounting, whereby the device enables the medium-side separation of the heating and / or water heating equipment from the primary heating system.

This object is solved by the device 15 according to the invention, which is characterized in that the two systems are separated by a heat exchanger when forming separate circuits and four circulating pipes in the form of cylindrical tubes are led vertically from the top and parallel to each other and at least two district heaters. of the pipeline sections connected to the second-turn circuit together with the non-flow transverse beam form a support structure, and that to support the support structure to the foundation of the installation site, the transfer device is provided at the closed ends of the foundation with foot portions forming a support surface for the device.

Preferably, by using a heat exchanger formed as a plate heat exchanger, the separation of the two systems can be achieved by forming the separated circuits. Since the stable, mainly steel pipelines can be used not only as their support function but also as support parts, a very simple support structure can be built with at least one closed horizontal cross support to which both the heat exchanger and other transfer device components can be attached.

il m t uit 11 m »i 3 94172 This conveyor design also allows for a complete, ready-to-use installation with plug-in electrical wiring, as only these need to be connected to the pipelines routed from above vertically and parallel to each other when constructing the conveyor. Since at least two parts of the pipeline connected to the district heating circuit and / or the secondary circuit become a component of the device, their space requirement is reduced.

Since the device is also equipped for installation on the floor of the installation site, the device can be mounted on an adjacent wall or as a free-standing structure on a suitable horizontal base, regardless of the support wall, by known fastening techniques.

The mechanically very stable structure of the second structural variant of the invention is obtained in such a way that the longitudinal supports consist of two vertically spaced vertical pipelines, namely one pipe section of the district heating supply line and one pipe section of the secondary circulation return line. The lower part of the pipeline forming at least the second longitudinal support 20 is made as a sludge collection device and is provided with a sludge removal device. The open end of the downcomer belonging to the pipeline can then be directed to the expanded settling chamber of the sludge collection device, whereby the settling chamber has an outlet pipe above the mouth of the downcomer.

In order to stabilize the pipelines belonging to the support structure, preferably made of steel, the at least one transverse beam preferably has a rectangular profile. It is oriented at right angles to the longitudinal supports and 30 are welded to them. The housing profile can be adjusted to hit-. in accessible butt surfaces without difficulty for partly different * · pipeline cross-sections.

In a preferred embodiment, each leg portion has at least one foot positioned at right angles to the plane 35 of both longitudinal supports, provided with height adjustment devices, such as screw legs, 4 94172 to compensate for unevenness of the base or small slopes of the longitudinal supports.

According to another structure of the invention, the pipelines and devices of the district heat transfer device are connected to each other as screw and / or welding connections. Compared to conventional flange connections, when using screw and welding connections, the piping can be shortened and the entire device structure can be made more compact. In addition, the pipe connections have smaller adjusting surfaces than the flange connections.

The plate heat exchanger and associated pipeline sections and components of the district heating supply and return line are covered with a jacket cladding at least on the front side. Depending on the construction, this cladding is removably attached to the rear support frame or part 15. Because the location of the drive components and piping is determined and optimized already at the manufacturing stage, heat radiation to the environment can be minimized while the station is covered with a jacket. Nevertheless, all components of the transfer device can be exposed if necessary, as the jacket cladding is easy to remove.

The central control unit is installed in the jacket cladding in front of the pipe sections of the district heating supply and return line so that it is visible from the front. The sheath cladding can be formed as a one-piece or multi-part sheet metal cladding or, depending on the preferred structure, as a plastic sheath.

In addition, according to an embodiment of the invention, the structural volume of the house station unit can be reduced so that the motor drive of the volume control device and the volume limiter are connected coaxially by an adapter and both the motor drive and the volume limiter act on the same district heating return line. Thanks to these measures, the valve body of the motor drive is not required. In addition to adjusting and limiting the volume flow

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5 The required district heating return line 94172 becomes shorter.

A parallel branch can be connected to the district heating supply and return line to heat the water. In addition, the heat exchanger system required for heating the water can be placed either in a second flat support module made as an additional support frame or in a support structure formed by the pipelines belonging to the system. In this way, the water heating unit and also the heating unit can be combined at the transfer station into a low-cost, ready-to-install structural unit. The transfer station can also be easily equipped later with a water heating unit that can be connected and installed as an additional module.

The dependent claims disclose further structures of the invention which are suitable. The invention 15 also relates to the individual structures and combinations set out in the claims.

Other details and advantages of the invention will become apparent from the following description of the structural examples shown in the drawing.

In the drawing, Fig. 1 shows a front view of a first structural example of a new transfer device pre-assembled and connected to a district heating system and a heating circuit; Fig. 2 shows a side view of a support frame, Figure 4 is a front view of the mechanical components and components supporting the first structural example / primary district heating circuit and the secondary heating circuit; Figure 5 is a plan view of the district heating return line; Figure 6 is a front view of the second structural example of the invention 35 corresponding to Figure 4. , in which the longitudinal supports of the support structure forming a two 94172 6 vertical pipelines of the transfer station for a free-standing installation, Fig. 7 is a side view of the structural example according to Fig. 6 without curtain Fig. 8 is a side view in partial section of the lower part of the second longitudinal support forming pipeline with a sludge collection device and a height-adjustable manifold, and Fig. 9 is a front view of another structural example in the installation position with the cladding in place.

The front view of Fig. 1 shows a transmission device in the form of a compact house station according to the first structural example, pre-installed and connected to the district heating network and the in-house heating circuit, as well as a heating filling device, a power supply and a weather sensor. All components of the transfer device 15, i.e. the house station, include the district heating supply line 2, the district heating return line 3, the heating supply line 4 and the heating return line 5, the electric control device 9, the heat meter, the single or multi-part jacket 7, the station and the drain valves and various shut-off devices are removably mounted on the rectangular support frame 10. The whole house station and its support frame and the pre-assembled components of the transfer device 1 can therefore be manufactured at the factory and fixed to the plant wall 11 or at a certain distance.

In the construction example shown in Fig. 1, hand-operated shut-off devices are connected to the junctions of all supply and return lines. An expansion tank 12 is connected in the normal way to the cold water supply of the heating circuit.

A pocket 13 for the operating instructions is attached to the side of the cladding jacket 7 covering the main components of the transfer station and also the heat exchanger.

The transfer device 1 shown in Figures 1 and 2 is compact in construction, but is nevertheless easy to handle and maintain when the cladding elements 7 are removed. The cladding 7 acts as a convector when the transfer device is in use without overheating itself. When using cladding, the 5 transfer stations can be placed both in special spaces in the house station and also in the work or hobby spaces of the house.

Fig. 3 shows the operating elements used in the structural examples described above, in which the central area delimited by the broken line 10 shows the elements of the transfer device 1 that can be installed in a factory or workshop with cladding and plug-in wiring in a flat base frame 10. Conventional components are connected to the district heating supply line 2. valve, pressure gauge, thermometer, dirt collector and temperature sensor. In the plate heat exchanger 15, the heat coming from the district heating circuit 2, 3 is transferred in the heating circuit 4, 5 to the circulating heating medium. The district heating medium flows through a compact plate heat exchanger countercurrent to the heating medium 20 and is directed back to the district heating network via the district heating return line 3. The district heating return line 3 is provided with a drain valve, a volume flow control device, collectively indicated by reference numeral 16, a volume counter 17, a temperature sensor, a thermometer, a second pressure gauge and a second shut-off valve.

The heating circuit has a temperature sensor 19, a temperature safety monitoring device 20, a safety valve, a circulation pump 21, a thermometer and a shut-off device on the supply side in the area of the house center shown. The heating circuit 30 to is closed by the heating device 22 and the heating return; on line 5, to which is connected a second shut-off device, a thermostat, a dirt collecting device, the connection of the expansion tank 12 and a drain valve. The plate heat exchanger 15 connections are arranged such that the heating medium flows through the primary side 35 through the plate heat exchanger 25 the secondary 15 26 94 172 8 with respect to the heating agent in countercurrent.

The electrical connection sequence related to the wiring diagram shown in Fig. 3 is already known. The motor drive 27 of the volume control part 28 of the volume control device 16 is controlled in an already known manner as a weather and temperature-dependent electric control device. The central unit 9 also connects the heating circuit to the circulation pump 21. Coaxial with the motor drive device 27, but on the other side of the control part 28 a volume flow limiter 29, 10 is arranged which acts to limit the volume flow to the same control part 28 as the motor drive 27.

The wiring diagram of Figure 3 shows, in broken lines, a water heating device 30 which can be placed with its additional switching components in its own support frame next to the frame 10 and covered in a suitable manner.

Figures 4 and 5 show the components of the district heating and heating circuit belonging to the transfer station 1 of the house station; Fig. 5 shows in the direction of arrows A-A in Fig. 4 those components of the district heating return line 3 which are important for the compact structure of the transfer device 1.

In the arrangement shown, the vertical supply and return lines 2 to 5 for district heating and heating are detachably attached to the transverse beams of the support frame 10 by suitable pipe clamps 40 with sound-absorbing parts.

25 All shut-off devices, plate heat exchanger 15, conduits and control parts are connected to each other and to the pipes with screws; there are no flange joints requiring a relatively large space in the first structural example. In this way, the conductor spacing of the station is shortened, the space requirement of the entire equipment is reduced and the movement of those in contact with the heating agents is reduced; the heat radiating surface of these components is also smaller.

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The district heat circulation takes place as shown in Fig. 4 from the supply line 2 through the front connection 32 up to the heat exchanger 15, then through the heat exchanger 15 in the vertical direction, and the circulating water then returns to the return line 3 via the front pipe connection 33 94172 downstream of the heat exchanger 15 to a pipe connection not shown in the drawing flows upstream of the district heating medium through the plate heat exchanger 15 upwards and exits via a pipe connection 34 to the heating supply line 4. The temperature sensor 19, the temperature safety control device 20 and the circulation pump 21 are shown in Fig. 4 as a heating supply.

The district heating return line 3 has a space-saving structure due to the compact screw-10 connections and the special design and location of the volume control device 16. The volume flow limiter 29 and the motor drive 27 are arranged coaxially in the volume control device 16 and act on the same valve body 28 of the control part 28 on two opposite sides by means of an adapter 31. In this case, it is not necessary to arrange two control parts next to each other and as a space-consuming structure, which are operated separately by the motor drive and the volume flow limiter. In this case, a separate valve body and a valve housing connected to the return line 3, which is partly arranged in part, are omitted.

The return line devices and wires are supported by additional clamps 41 on a bracket 42 attached to the frame. The plate heat exchanger 15 can also be supported on the same bracket.

‘I 25 The connection of the hot water pipe 30 is shown in Fig. 4 by a dotted line.

The second structural example of the remote transfer device 100 shown in Figs. 6-9 has essentially the same operating components as the first structural example 30 described above. The circuit diagram shown in Figure 3 therein. with its functional components presented, therefore, in principle also applies to the second structural example. Therefore, in spite of the external differences and dimensional differences therein, the coupling components of Figs. 5 to 9 are denoted by the same reference numerals as in Fig. 3.

10 94172

The second structural example of the district heating transfer device 100 differs from the first structural example 1 mainly due to its different support structure. In another construction example, instead of a flat support frame 10, a support 101 is used, which has at least two vertical pipes 2 and 5, into which a transverse beam 102 with a cross-sectional profile (rectangular) is welded. In addition to the actual function associated with them - the district heating supply and heating return line - the vertical pipelines 2 and 5 support the vertical sides of the support frame 10 (Fig. 4). Especially in larger structural transmission stations, steel pipelines are used, the mechanical stability of which is sufficient in all situations when they act as profitable longitudinal supports. The torsional stiffness of the support field 101 can be further increased by connecting district heating return lines and heating supply lines 3 and 4 to it. Pipelines 3 and 4 are welded to a multi-part transverse beam 102.

The longitudinally supporting pipelines 2 and 5 are extended downwards over the level of the heat exchanger connection 32. The lower pipe section 120 is fixedly connected to the foot-shaped, height-adjustable manifold 110. The lower pipe section 120 of the supporting pipeline 2 may be used as a sludge collection section, may be connected to a sludge removal device 25 and .

The lower part 150 of the left vertical longitudinal support 5 formed as a sludge collecting device is shown. more closely in Fig. 8. The actual pipeline 5 protrudes as a downcomer 151 into the expanded settling chamber 152. In the settling chamber 152, solid sludges from the heating return line 5 settle downwards in the sludge removal area due to a decrease in speed 35, while

Il BB i «IB Ϊ (? -Ei 1 X1 94172) secondary substance (water) is directed to an outlet pipe 153 arranged above the mouth of the downcomer 151. A suitable sludge removal device 154 is close to the bottom of the sludge collecting device 150 in connection with the settling chamber 152. Another foot-shaped supports the lower end of the longitudinal support formed together by the pipeline 5 and the expanded sludge collection section 150.

Each foot-shaped divider portion 110 has, at the front and rear ends, manual height adjustment devices 10, which are screw divisions 111, for smoothing out unevenness of the base or slope errors of the support structure 101 in a suitable manner. By means of the foot portions 110, the district heat transfer device 100 shown in Figures 6 and 7 can be placed free-standing at any point near the support wall or 15 apart from it, so that the house connections are in line with the pre-installed pipeline connections of pipelines 2-5.

The mounting plate 130, on which the central unit and the heat meter are mounted, is fixed by support members 131 and 20 with fasteners 132 to the district heating return line 3.

The principle structure and operation of the high power transmission station 100 specifically correspond, as already mentioned, to the first structural example described above. Also in this structure, there are pipe connections 30 of the district heating supply line 25 and the return line, which are connected to a water heating device, which is not shown in the drawing. The water heating device can be connected as a module to the transfer device 1 or 100 according to Fig. 4 or 6 together with the operating elements related to the use of the equipment. For the module to be connected to the Ra-30 field, either a separate support frame 10 or piping necessary for its operation can be provided.

Figure 9 shows a pre-assembled second embodiment 100 of a district heat transfer device. The cladding 170 35 is formed as a one-piece plastic housing. In the structural example shown, the cladding is removably connected to the support structure 101 by suitable fasteners and detents 171 in the pipelines 2-5 forming the longitudinal supports and by a screw connection at the top of each foot 110.

The invention is not limited to the two structural examples described above, but combinations of the features of both structural examples are entirely possible. The connections and connections of the pipes are preferably made by welding or screw connections; however, as shown in Fig. 6, flange connections are preferred above all where separate components, for example the heat exchanger 15 and / or the branch in front of the district heating return line, have to be located in front. Pipes serving as pit-15 support, namely the district heating supply line 2 and the heating return line 5, do not have to be completely parallel and / or vertical and / or straight to each other; any mutual slopes can be corrected and smoothed by connecting the divisions 110 to the device 20 and / or by adjusting the height adjustment devices as appropriate. Instead of a single transverse beam 102, a truss structure comprising a plurality of parallel beams may be provided. However, the one transverse beam 102 shown is sufficient, because the connection of all the vertical pipes 255 through the heat exchanger 5 also increases the transverse stability of the entire support structure.

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Claims (12)

Apparatus for transferring district heat to a heating and / or water heating installation, wherein heat is transferred from one primary heating system (2, 3) used in circulation of one medium to another via a circulation pump (21) to at least partially circulate its controlled secondary system (4, 5). at least one volume control device (16) and one heat exchanger (15), the device 10 being provided with at least two vertical and parallel spaced wires connected to each other by at least one transverse beam (102) and acting as a support structure for the transfer device components, characterized in that the two systems are separated from each other by a heat exchanger (15) when forming separate circuits (2, 3; 4, 5) and four circulating lines formed as cylindrical tubes are led vertically from above and parallel to each other in the device. n and at least two of the two pipe sections connected to the district heating circuit and / or the secondary circuit together with the non-flow transverse beam (102) form a support structure (101) and that to support the support structure to the foundation of the installation site form a support surface for the device. Device according to Claim 1, characterized in that the longitudinal supports are formed by two pipelines (2, 30 5) which are furthest apart. Device according to Claim 1 or 2, characterized in that at least the part close to the lower surface of the second longitudinally supporting pipeline (5) is formed as a sludge collecting device (150) and is provided with a sludge removal device (154). 14 94172 k Device according to claim 3, characterized in that the open end of the downcomer (151) belonging to the pipeline (5) protrudes into the expanded settling chamber of the sludge collection device (150) and that the outlet pipe (153) above the open end of the downcomer 5 (151) joins the settling chamber (152). ). Device according to one of Claims 1 to 4, characterized in that the transverse beam (102) has a rectangular box profile and is welded to at least the pipelines (2, 5) forming the longitudinal supports, preferably also to other pipelines (3) which are substantially parallel to them. , 4). Device according to one of Claims 4 to 5, characterized in that each distribution part (110) 15 has at least one foot at right angles to the mounting plane of the longitudinal supports (2, 5) and height and / or angle adjustment devices (110 '). Device according to one of Claims 1 to 6, characterized in that the heat exchanger (15) and the district heating supply and return pipe sections and components connected thereto and one part of the secondary circulation components are covered with a jacket-shaped cladding (7; 170) on the front and the cladding is removably attached to the support structure (101). Device according to Claim 7, characterized in that in a jacket-shaped cladding (7; 170. a central control device (9) is fastened in front of the pipeline parts of the district heat supply and / or return line (2, 3) in front view. Device according to claim 7 or 8,; characterized in that the cladding (170) is detachably fastened by fasteners (171) to the pipelines (2, 5) forming the longitudinal supports. Device according to one of Claims 1 to 9, characterized in that the district heating supply and return lines (2, 3) are provided with a connection (30) for heating water. . Device according to one of Claims 1 to 10, characterized in that the pipeline sections of the primary and secondary supply and return lines (2, 3, 4, 5) belonging to the transfer device are connected to the support frame (10) or the support structure (101) by shock-absorbing parts. with pipe clamps (40, 41). Device according to Claim 2, characterized in that the two pipes (2, 5) which are furthest apart form one pipe section of the district heating supply line and one pipe section of the secondary return line. 16 94172