Method of vapor curing, mainly block concrete products

 

(57) Abstract:

The invention relates to construction materials, in particular to methods of vapor curing of concrete products, mainly briketirovannogo form. The purpose of the invention is the provision of opportunities for regulation of the intensity of the processes of hardening of the concrete mixture during the passage of the package swietochowski concrete products through a soaking zone in single - and multi-row steaming the tunnels, and increase the uniformity of the temperature distribution of the gas mixture at the height of the zone of exposure of the camera. In the process of discrete transportation of concrete products in packages steaming through the tunnel when they are wet-heat processing is proposed to carry out the steam flow along the package of products, and in periods stop package is additionally directed to pass steam through a package of products by creating over him local areas of excessive pressure. 1 C.p. f-crystals, 3 ill.

The invention relates to the field of building materials and can be used for the production of concrete, Solomonic and concrete blocks and other concrete products.

The known method Termoplast ulcerous actions including heating of concrete products in the heating zone of the camera, the shutter speed in the area of isothermal soaking and cooling in the cooling zone in the given technological regimes, corresponding to a cycle of wet thermal treatment, in which the curing of concrete products continuously or periodically (discretely) with a given rhythm transported from one stationary zone s to another [1]

The closest technical solution is a way of wet thermal processing chamber for heat treatment of materials. According to this method trolley with stacked products are moved in the chamber of the heat treatment on the track and the carrier (for example, a gas / air mixture or steam), served in the lower part of the chamber. Due to the presence of perpendicular movement of the trolleys heat-reflecting shields, and the bottom part is made of elastic material in the chamber is the circulation of the supplied coolant RA redistribution with the flow of the gas mixture on its height [2]

The disadvantage of this method is the presence of non-uniformity in the temperature distribution in the vapor-gas mixture at the height of the camera and lack of control iagnostic processing in the camera continuous action mainly block concrete products, which includes packaging products in districtno transportation service products through the heating zone, soaking and cooling when the supply of steam from the bottom in the zone of isothermal soaking, steam is carried out in parallel vertical planes of the package of products, and in the interim period of service products is additionally directed to pass steam through a package of products by creating on the package of products, local areas of excessive pressure. In addition, changing the length of the steam chamber the pressure of the vapor mixture generated on the package of products.

Comparative analysis of the proposed solution with the prototype shows that the proposed method differs from the known fact that provides the possibility of regulating the intensity of the processes of hardening of the concrete mixture during the passage of a package of products through the soaking zone steaming chambers.

The proposed solution allows to increase the uniformity of the temperature of the gas mixture at the height of the zone aging products steaming chambers.

In Fig. 1 shows an example of executing steaming chambers tunnel type on the proposed spamy the method is as follows.

Tunneling double-flow steam curing chamber 1 (Fig. 1) has two adjacent horizontal tunnel, each of which consists of three stationary zones: A heating zone, B zone exposure, zone cooling products.

Loading the camera is at one end, the discharge from the other end of the tunnel. The tunnel length is divided into separate compartments. In the chamber organized the movement of workpieces in two mutually opposite directions for the two streams of products subjected to wet-heat processing, formed a common area B exposure. Package products stack layers, consisting of near swietochowski small parts, for example, concrete, Solomonic or cinder blocks (located in the forms or without them), and the channels between them. Thus, for example, in each layer perpendicular to two adjacent rows of products of the previous layer. When working steaming chambers are steam flow in the lower part of zone B extracts chamber through the perforated distribution manifold 2 with holes parallel to the vertical planes of the package of products and the resulting vapor mixture fills the entire volume of the chamber (zone a, B, C). Regulation of the steam flow rate is carried out with the Ohe And heating (Fig. 2) on pallets 5, located on the bracket 6, is suspended using blocks 7 on the rail 8, is laid along the axes of the tunnels at the top of the camera. This area is heated inside batches of products subjected to wet-heat processing. When discrete (pulsating) transport with the given rhythm in zones a, B, camera packages 4 are moved from one compartment of the camera in the other and stop in each of them. In the upper part of each of the compartments (Fig. 2 and 3) has a shaft 9 to host the axial blade wheel 10 and the turbine 11, which serves to rotate (drive). The turbine is driven by steam supplied to it through the nozzle 12 from the steam pipe 13, is laid along the monorail 9. When stopping package products in each of the compartments of the tunnels directly under axial blade wheel 10, the latter due to its rotation creates over local service area excessive pressure and steam-air mixture moves up and down through the channels 14 between the rows of 15 products (Fig. 2 and 3), thus increasing the turbulization in the chamber, increasing the efficiency of heating products in the area And their heating, intensificar the process of evaporation of moisture from the concrete and accelerating the process of its torden the pair, supplied to the nozzle 12, it is possible to adjust the frequency of rotation of the axial impeller 10 and accordingly to change the pressure of the vapor mixture generated on the package of products along the length of the steam chamber, which in turn, causes a change in the velocity of the moving air-steam mixture through the channels 14 in the package of the product, the intensity of heating products in the area And their mode of exposure in the zone B and the cooling zone In the camera. Knocked out in the ends of the tunnel camera work openings for loading and unloading products steam-air mixture passes through the heat exchanger-condenser 16, is captured by means of the exhaust umbrellas 17, carries out the second time through capacitors 18 and using a recirculating fan units 19 to the duct 20 is fed to the cooling chamber C. the regulation of the amount of recirculated air supplied to the zone of the cooling chamber and ejected from the chamber into the atmosphere through the throttle valve 21 located in the duct 22. The condensate from heat exchangers-condensers 16 and 18 of the steam chamber is controlled through the pipes 23 and 24, the water for cooling these capacitors is supplied from the circulating system W. Side loading and unloading of products related parts of the tunnels included in the zone of heating and cooling steaming chambers separated by a flexible partition.

The proposed method is possible to design the steam chamber with any number of parallel active tunnels.

SOURCES OF INFORMATION

1. Burov Y. S. Technology of building materials and products. M High school, 1972, S. 463.

2. USSR author's certificate N 751804, class C 04 B 41/30, 1980.

1. Method of vapor curing, mainly block concrete products, in camera continuous action, including packaging products and discrete transportation service products through the heating zone, soaking and cooling when the supply of steam from the bottom in the zone of isothermal aging, characterized in that the steam in the steam chamber is carried out in parallel vertical planes of the package of products, and in the interim period of service products additionally passed steam is directed through a package of products by creating on the package of products, local areas of excessive pressure.

2. The method according to p. 1, characterized in that the change in the length of the steam chamber the pressure of the steam locomotive

 

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