DD215146A1 - CIRCUIT ARRANGEMENT FOR STEAM / WATER HEAT TRANSFORMER STATIONS - Google Patents

Abstract

The invention relates to a circuit arrangement for steam / water Waermeumformerstationen in which the heat transfer between steam as a heat carrier and water as the heating medium, wherein the resulting condensate is returned in open or closed system. The arrangement is designed so that a required condensate Rueckspeise temperature is maintained even in the design case of the condenser by an inventive leadership of the condensate line in the return line without using a conventional condensate cooler. The proposed arrangement a large variability of Kuehlleistung is possible, so that by optimally adapting to the particular project significant material savings are possible. The modular elements can also be used for hot water preparation.

Description

Title of the invention

Circuit arrangement for steam / water heat exchanger stations

Field of application of the invention

The invention relates to a circuit arrangement for steam / water Wärmeumformerstationen in which the heat transfer between steam as a heat transfer medium and water as a heating medium, wherein the resulting condensate is fed back in the open or closed system.

Characteristic of the known technical solutions

The known steam / water converter stations consist on the steam / condensate (primary) side of the steam-heated heat exchanger / condenser / and a downstream condensate cooler, the condensate regulator, steam traps and an open or closed condensate return system. Open systems are understood to mean condensate removal in which the condensate comes into contact with the atmosphere, while in closed systems the condensate does not come into contact with the atmosphere and is usually conveyed back to the steam generator system by the vapor pressure. In the design case, the condensate leaves the steam-heated condenser at a temperature which is between 100 ⁰ C and the Sattdamp.ftemperatur of the heating steam. The condenser must be followed by a condensate cooler as the condensate

-SMAI1983 * 08783i

temperature of the recycled condensate, a permissible maximum value, which is set by the operator of the steam generator plant and experience is about 80 ⁰ C, may not be exceeded. The Kondensatnachkühler provides a heat exchanger in a known design a pressure vessel, and is very material-intensive, while due to the low condensate mass flow its efficiency re- _e tively low.

These steam / water converter stations do not meet the requirements of scientific and technical progress, in particular because of their high equipment costs with condenser and condensate cooler.

By a DD patent, a solution to the problem by a circuit arrangement for steam / water converter stations is shown, but is applicable only for systems with the same water quality i'm primary and secondary network.

For systems of different water quality between the primary and secondary networks, the most common form, there is no possibility of operating condensers without a condensate cooler.

Object of the invention

The invention has the goal in heating water circuits, which relate their heat via heating steam and in which flow in the primary and secondary network media of different water quality, to achieve a significant reduction in investment costs.

Presentation of the essence of the invention

The object of the invention is to develop a circuit arrangement by means of which the operation of capacitors without condensate cooler in the sense of pressure vessels is possible, flow in the primary network and the secondary network media of different water quality and the condensate return takes place in the open or closed system.

This object is achieved in that the condensate line is guided immediately after the condenser in the return line of the secondary network such that the condensate in the condensate line after exiting the Kondensatleitüng

the return line is the required grate temperature of approx. 80. C. does not exceed. The principle of action used is well known. Each surface heat exchanger consists of a system of guide elements for guiding a flow of media in another media stream. The heat exchangers known and used for heating technology represent pressure gradients that are correspondingly material-intensive and therefore expensive. ' Also, the leadership of a pipeline in another pipeline for the purpose of heat transfer is known per se, but it was first applied to the design of heating networks with the inventive solution. The inventive arrangement, a circuit arrangement was used in a conventional manner for solving the problem of temperature reduction of the "condensate temperature, which is completely atypical in the heat supply and in circuit arrangements in this sense.

For the purpose of greater effectiveness, the condensate line is guided in a spiral shape in the return line, the condensate line should consist of a modular system for the purpose of easy installation and a universal application width of prefabricated elements. So can any heat transfer surface and

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so that heat exchanger performance can be realized. These heat exchangers manufactured in this way do not constitute pressure vessels or thick-walled apparatus in the sense of technical monitoring and are significantly less expensive than conventional heat exchangers, since they have a very favorable power / mass ratio.

Another significant advantage is the space-saving installation of the condensate line and thus the heat exchanger surface in the return line. It can easily be retrofitted existing heat exchanger stations with this cooling, without having to provide space for a heat exchanger as in the previous method, since only the existing return line needs to be offset and slightly expanded.

The material savings compared to the previously used condensate cooling with condensate cooler in the sense of pressure vessels up to 75%.

The condensate drain control valve may be arranged before, but also after the passage of the condensate line in the return line in the condensate line.

This arrangement of laid according to a modular system helical tubes can also be used for hot water.

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Exemplary embodiment

In one embodiment, the arrangement will be explained in more detail *. In the accompanying drawing shows

FIG. 1: Circuit arrangement in the case of steam / water heat exchangers Stations The condensate line 1 is guided in the return line 3 immediately after leaving the condenser 2 according to FIG. In this case, the condensate line 1 in the region of the guide in the return line 3, ie in the region of heat transfer, designed such that it consists in this area of two helical tubes with the same wind radius, which are mounted axially offset in line 3 in FIG.

At the straight connection piece of helical tubes steel fittings 6 are attached to copper pipes. These elements are prefabricated parts according to a modular system and can be mounted by the user himself according to the manner shown in FIG. It must thereby be housed as much helical tube elements in line 3, as are necessary for cooling the condensate temperature at design load of the capacitor, it does not matter whether the helical tube elements are connected in parallel or in series.

In open systems, the condensate drainage control valve 7 should after leaving the condensate line 1 from the return line 3, in closed systems, the condensate drain control valve 7 is preferably located immediately after the condenser.

Claims (8)

invention claim 1. Arrangement for cooling the condensate from steam-heated heat exchangers in heating networks, preferably the heat supply, wherein the primary network and the secondary network is interconnected by the partial guidance of the condensate line in the return line, characterized in that the condensate line (1) has a significantly smaller diameter as the return line (3) and the line (1) after leaving the heat exchanger (· 2) in such a way in line (3) is guided. that it has a large heat exchanger surface in a relatively short tube element of the line (3), wherein it is preferably guided in a spiral shape in line (3). -. ^ 2. Arrangement according to item 1, characterized in that the line (1) in the field of heat transfer from one or more parallel-connected helical tubes. 3. Arrangement according to item 1 to 2, characterized in that the line (1) has a wind diameter in the region of the heat transfer, which is designed differently along the line (2). 4. Arrangement according to item 1 to 2, characterized in that the line (1) in the heat transfer from several but at least two spiral tubes, which have a same Winderadius but axially offset in line (3) are mounted. 1983 * 087 834 5. Arrangement according to item 1 to 2, characterized in that the line (1) in the field of heat transfer from several but
at least two helical tubes exist, which have a different diameter wind. 6. Arrangement according to item 1 to 5, characterized in that the line (1) in the heat transfer from smooth tube and / or profiled tube. 7. Arrangement according to item 1 to 6, characterized in that the line (1) in the field of heat transfer consists of prefabricated elements. 8. Arrangement according to item 1 to 7, characterized in that the diameter of the conduit (3) in the region of the guide of the conduit (1) is extended such that the free flow cross-section
of line (3) in this area corresponds approximately to the free flow cross section of the line (3) without installation of line (1). Open to drawings -5MA11983 * 087834