DD221539A1 - STEAM / WATER MIXING TUBE - Google Patents

Abstract

The structural design of a steam / water mixing tube is set forth. The invention is intended for all heat transfer systems in which the heat carrier steam serves to heat water. The invention aims to reduce the hitherto necessary technical effort and the noise level in the direct mixing of steam with water and preferably to use the horizontal version of the apparatus. The invention is based on the object that in a jacket tube, which is acted upon by a corresponding nozzle with steam, a water-perforated pipe with a defined number of holes inserted, in which the mixing of steam with water. The thus heated water is fed by forced circulation of Heizwasserkreislauf.

Description

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Title of the invention Steam / water mixing tube

Field of application of the invention

The invention is intended for all heat transfer systems in which the heat carrier steam is used to heat water.

Characteristic of the known technical solution

The direct introduction of steam into the water to be heated by means of mixing preheater are known. Cascade mixing preheater and flow mixing preheater. The apparatuses differ considerably in their construction and their dimensions due to the chosen methods.

With the mixing preheater, the steam is blown directly into the heating water in a lying container filled with water. In the cascade mixing preheater, which is designed as a stationary container. Sparkling heating water is directly heated by counterflow of steam. The heated water reaches its saturation state of the associated vapor pressure in both methods, with a corresponding vapor pressure cushion building up over the water. The use of such apparatuses for the operation of extended heat networks leads to difficulties in the control of the operating pressure and places limits on their application. The flow mixing preheater is designed to be more variable and uncomplicated in the heating networks. The management behaves like the known indirect heat transfer systems.

In the flow mixing preheater, the two media steam and water are mixed without forming a Dampfpolsters. This happens in such a way that there is a steam nozzle pipe in a jacket pipe, "over which the steam flowing through it gives off its heat by condensation upon penetration into the water.

A disadvantage of this apparatus is the vertical installation and the high noise level. Thus, the use in low rooms and in residential buildings is excluded.

Object of the invention

The invention has the goal of direct mixing of steam with water from the jacket tube in the core located in the water passage pipe, in a horizontal arrangement and reduced installation effort to perform.

Explanation of the essence of the invention

The invention has the object to provide ice steam / water mixing tube in which steam is mixed as a heat carrier with water and the heated water remains below its saturation state. The problem is solved 'for a steam / water mixing tube, that in a jacket tube, which is acted upon by a corresponding nozzle with steam, a flowed through water pipe with a defined number of holes.

The water passage pipe is the input side connected to the jacket tube by a flange and the output side with a dished bottom. In order to counteract the different expansion ratio between jacket and through-tube, a defined annular gap is arranged shortly before the exit of the passage tube. To stabilize the inserted water passage pipe three spacer plates are welded offset.

The mixing of steam with water is carried out-from outside to inside with flowing water with the condition that the pressure level in the water pipe is always smaller than the vapor pressure.

The steam / water mixing tube can be used in a horizontal and vertical version without restriction. In the horizontal arrangement, it should be noted that the steam inlet nozzle is integrated laterally or laterally into the jacket tube.

embodiment

An embodiment of the invention is illustrated in the drawing and will be described in more detail below.

Figure Längsschnitt'durch a steam / water mixing tube ^J The water vapor flows through the steam inlet nozzle (4) in the jacket tube (1) and displaced via the steam nozzle holes (3) in the water passage pipe (2) located in the jacket tube (1) water. As a result, the steam nozzle holes (3) are set free from the water inclusion in the jacket tube (1) and the steam penetrates into the water in the water passage pipe (2) flowing water. The steam releases its heat energy through condensation as it enters the flowing water. The water flows through the cold water inlet (5) through the water passage pipe (2) and leaves heated the heating water outlet (6). By forced circulation the heating water is supplied to the consumer. -

Claims (3)

invention claim 1. steam / water mixing tube, characterized in that a water-flowed pipe with a defined number of holes in a steam-driven casing pipe inserted so that the steam can penetrate into the water of. -Outside inside. 2. steam / water mixing tube, characterized in that the 'water passage pipe is equipped with steam nozzle holes, and is connected to the inlet nozzle with a flange on the jacket tube. 3. steam / water mixing tube, characterized in that the water passage pipe is provided shortly before exit with an expansion gap and the outlet nozzle is welded into a bottom. For this 1 page drawing