SU1678624A1 - Apparatus for heat-and-vapour treatment of concrete and reinforced concrete structures - Google Patents

Abstract

The invention relates to the manufacture of building materials and products and can be used in many type of steam curing chambers for the treatment of concrete and reinforced concrete products. The purpose of the invention is to increase the efficiency of using thermal energy of steam. The device consists of an evaporator 3 and a condensate duct-preheater 6 placed on the long sides of chamber 1. The evaporator contains an outer perforated pipe 4 and an inner (non-perforated) manifold 5 of steam. The inner (5) steam enters the outer perforated pipe 4 - chemically cleaned heated water from the condensate line heater, along the longitudinal axis of the chamber in the tray deepening of the floor there is a condensate-wire-heater of chemically purified water (condensate cooler) 6. put an exchanger tube in tube type. Chemically purified water is supplied to the evaporator through the inner tube, and the condensate of the primary (acute) steam moves from the evaporator to the annular space. A condensate trap is installed to separate the condensate from the steam when leaving the evaporator. In the evaporator and the heater organized countercurrent movement of media. 2 Il. 1 tab. THX

Description

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The invention relates to the production of concrete and reinforced concrete products, namely, steam curing chambers,

The purpose of the invention is to increase the efficiency of using thermal energy of steam.

FIG. 1 shows a camera, a longitudinal section; in fig. 2 - the same cross section.

The original sides of chamber 1 with lid 2 in the lower part of the chamber contain evaporators 3, each containing an outer perforated pipe 4 and an internal (non-perforated) collector 5 steam. A condensate line 6 - heater of chemically treated water is placed in the tray cavity of the floor. A tubular heat exchanger 7 of the secondary heat carrier, chemically purified water, which is pumped to the evaporator, is located inside the co-condensate pipe B. The condensate-to-conductor 6 is connected by a steam trap 8 to a collector 5 of steam.

The device works as follows.

Primary (acute) steam enters the evaporator through the internal collector 5 for heating and evaporation of water in the annular space. The secondary steam thus formed expires into the volume of the quarry through the holes of the perforated pipe 4. Condensate formed after condensation of the primary steam enters the annular space of the condensate line 6 through the condensate trap 8, in which the preheated chemically purified water is preheated. The condensate is cooled to a temperature not lower than the set ambient temperature in the chamber volume.

In order for the low temperature of chemically purified water at the inlet to the condensate duct-heater to not cause cooling of the medium, water enters the condensate duct b through a tubular heat exchanger 7 separated from the medium in the chamber volume by a layer of more heated condensate. The cooled condensate is discharged from the chamber, and the heated chemically purified water enters the annular space of the evaporator 3. Thus, the proposed device has a simpler design, allows its use in many and tunnel-type chambers, provides greater usefulness of the chamber volume for filling with processed concrete products , what in

in turn, it reduces the share of heat loss per unit volume of processed products. The design of the device allows you to create the necessary heat and humidity conditions without additional placement of devices for humidifying the working environment in the chamber. In addition, the proposed device ensures the beneficial use of part of the physical heat of the primary steam condensate,

eliminates its contamination with the products of the technology, solves the acute problem of returning it to power the boilers at the heat supply station. The simplified design of the device facilitates maintenance and

most increases the reliability of operation. The main technical and economic indicators of the proposed and known devices are shown in the table.

Claims (1)

Invention Formula A device for heat and humidity treatment of concrete and reinforced concrete products, containing a chamber, steam collectors with an evaporator placed in it, and a tubular heat exchanger with a secondary heat carrier, characterized in that, in order to increase the efficiency of using thermal energy of steam, the chamber is equipped with a condensate line along its longitudinal axis a recess floor, and steam collectors are placed in an evaporator, made in the form of a perforated tube, communicated with a secondary tubular heat exchanger 5 of the coolant located in the condensate duct connected by a steam trap to the vapor collectors, the latter being placed along the walls of the chamber in the lower part. l2l xiin FIG. 2