DD143175A1 - CIRCUIT FOR PRESSURE, QUANTITY AND ADJUSTMENT CONTROL IN REMOTE WASTE - Google Patents

Abstract

The invention is preferably applicable to the district heating supply of residential areas and other consumers via hot water networks. The aim of the invention is to develop a circuit for district heating networks through which the water quantity remains constant at a constant temperature, the expenditure for circulation, pressure maintenance, and control technology in the heat-forming center is reduced, savings are achieved in connection stations, the network is simultaneously used as a heat storage device, and construction costs are reduced. According to the invention, this object is achieved by arranging a short-circuit path between the supply and return lines before the mixing device, and discharging the unused hot water quantity into the return line via a two-way valve in the return line. This makes it possible to continuously regulate the pressure using a control unit. Furthermore, the maximum supply temperature in the secondary network is ensured by installing a solenoid valve in the negative pulse line of the differential pressure regulator. The invention is applicable to district heating networks. - Figure -

Description

Title of the invention

Circuit for pressure, quantity and mixing control in district heating networks F 24 D 3/00

Field of application of the invention

The invention is preferably applicable to the district heating of V / ohngebieten and other consumer via hot water networks.

Characteristic of the known technical solutions

In hot water district heating networks, which can be operated at constant temperature only with variable amounts of water, a major effort for the circulation, pressure increase and control in the heat conversion center is required. Furthermore, the heat input during operation and 'the production of the equipment is associated with high costs

 Described is such a solution in WP 13Ί 879th

Object of the invention

The aim of the invention is the development of a circuit for Fernwärmenet ze, through which at constant temperature, the amount of water also remains constant, the cost of circulation, pressure maintenance and control technology is reduced in the heat Umformzentrale, savings in the terminal station achieved, at the same time the network is used as a heat storage and the construction costs for the production are reduced.

Explanation of the essence of the invention . ^

The invention is based on the object that by a certain circuit of district heating networks at constant temperature, the amount of water also remains constant, and thereby the circulation of the Heizmedium3 is substantially simplified in the primary circuit, the pressure maintenance remains stable and the control technology is reduced. Furthermore, the Wetz is to use as a heat storage. By saving recirculation, omission of the fluid couplings and fittings the production costs are significantly reduced. In the terminal station costs for operation and construction must be saved «

According to the invention the object is achieved in that the admixture is arranged and discharged via a two-way motor valve in the return, the not removed amount of heating water in the return.

This makes it possible iat it possible to continuously perform the pressure control by means of a control unit, as constantly the same amount of heating water is enforced. The same applies to the volume control in the return.

AusfuhrungsbeispieI

The invention will be explained in more detail below on a Ausführungsbei- 'game.

The accompanying drawing shows a variant of the possible circuits.

The circuit consists of the primary flow 1 with Absperramaturen 2, dirt filter 3> pressure control unit 4, with bypass valve 6, safety valve 5, secondary flow 8, mixing line with check valve 7 and shut-off valve 2, secondary return 9 with Absperramaturen 2 and mixing pump 10, two-way motor valve 11, quantity limitation 12 and Solenoid valve 13 »Overflow regulator 14 with line and primary return 15, short circuit with shut-off valve 2 and throttle valve 6 as well as a short-circuit path before admixture.

The primary flow 1 is operated constantly with a certain temperature of the heating medium. The pressure is reduced via a control unit 4 to the required pressure of the secondary network and the heating medium temperature is lowered by admixing to the desired flow temperature of the secondary network, the not removed Heizwassermenge is passed due to an outside temperature-dependent flow control by the two-way motor valve 11 via the short-circuit connection in the primary return. For pressure relief, a safety valve is placed after the pressure reducer.

In order to protect the maximum flow temperature of the secondary network, a solenoid valve 13 is installed in the negative pulse line of the differential pressure regulator, so that it takes over the puncture of temperature protection in addition to limiting the quantity "

Claims (1)

213026 Erfindungsanapruch Circuit for pressure, quantity and admixing control in district heating networks, characterized in that a short circuit path with two-way motor valve (11) is arranged in the return between the feed (1) and return (15) before admixture and by the installation of a solenoid valve ( 13) in the negative pulse line of the differential pressure regulator (12). For this / j ropes drawing