The method of manufacture of concrete and concrete products and installation for its implementation

 

The invention relates to techniques for manufacturing products based on cement with the use of heat treatment at atmospheric pressure. The technical result - the reduction of operating costs. Concrete and concrete products are manufactured at the facility, including batchers, concrete mixer, molding site, the camera steaming. The installation also includes a generator flue gas saturated with water vapor, coupled with camera steaming. The generator is designed in the form of a layer of a heat exchanger filled with ballast, and equipped with a furnace and a water supply from above. 2 S. and 1 C.p. f-crystals, 1 Il.

The invention relates to techniques for manufacturing products based on cement, lime or lime-silica binder with application of heat treatment at atmospheric pressure.

The present invention can be used in the manufacture of various structural components for industrial and civil construction.

There is a method of manufacture of concrete and concrete products, including metering and mixing of the components of the filler and binder with water, molding, vibration, followed by thermal treatment of products in the environment Nacho method includes dispensers coarse and fine aggregates, binder and water, concrete mixer, molding the node chamber for steaming periodic or continuous operation, is connected by a pipeline with the generator of the heat carrier (steam boiler). Average steam consumption for thermal processing of products is 250-450 kg/m3concrete products (O. A., Gershberg. The technology of concrete and concrete products. The publishing house construction. M. , 1971, S. 140-147, 197-202, 305-313).

The disadvantage of this method and installation for the manufacture of concrete and concrete products is the use of the heat treatment expensive steam generated in a cumbersome boiler units, and its loss during transportation to the cameras steaming. This increases capital and operating costs.

The closest in technical essence and the achieved result is a method of manufacture of concrete and concrete products, including concrete mix appropriate material composition, molding and heat treatment products at atmospheric pressure the heat carrier in the form of flue gases.

Installation for implementing this method includes dispensers, betonosmesitel, forming the node chamber for steaming, connect the camera, connected by ducts with the forced-draft fan, induced draft fan, the flow of the surrounding cold air, furnace and chamber for steaming (in. A. Peregudov, M. I. Horn. Thermal processes and installation technology, building products and parts. M.: stroiizdat, 1983, S. 142-144).

The disadvantage of this method and installation for the manufacture of concrete and concrete products is the saturation water vapor coolant through dehydration product in the steam chamber, which reduces the strength of the products.

Due to these shortcomings inherent in these methods, the further intensification of the process of heat treatment of products and reduce capital and operating costs become difficult.

The objective of the invention is to reduce operating costs without sacrificing quality products through the use of cheap coolant.

Another object of the invention is to reduce material consumption and improve the compactness of the installation.

The basis of the invention is the improvement of the heat treatment in the method of manufacture of concrete and concrete products using steam without its supply from a boiler plant.

This problem is solved posredstvennoj composition, forming and thermal processing of products at atmospheric pressure the heat carrier in the form of flue gases according to the invention, the flue gases before thermal processing of products is saturated with water vapor.

Possible that the saturation water vapor in the flue gases produced by filtering the streams of water flowing down into the layers of granular material.

Rationally in the way of thermal processing products lead when the coolant temperature is equal to 60-190oC.

The problem can be solved by setting, including batchers, concrete mixer, molding the node chamber for steaming, is connected by a pipeline with the generator carrier, equipped with a furnace according to the invention the generator carrier is made in the form of a layer of a heat exchanger filled Balasta and air from above the water.

Its possible that as ballast used balls or cylpebs faction 5-30 mm in This embodiment of the method allows to produce intense high-quality thermal treatment of products in a wide temperature range when using cheap water saturated brine.

Structural features of the invention allow to obtain a moisture-filled heat to adjust the temperature of the coolant.

The invention consists in that the gaseous fluid is saturated with moisture when water evaporates from the surface of the weight in contact with flue gases, and not through the wall of screens from the family of pipes, as in boiler plants. Thanks to this generator coolant becomes compact and can be installed in the production line of concrete and concrete products directly to consumers gas mixture (camera for steaming). In addition, layer the steam generator produces the coolant is significantly harder and cheaper than boiler units.

Wide possibilities of varying the temperature of the coolant within 60-190oAllows to apply the method for the production of concrete and concrete products on the basis of different types of binder (lime, cement, lime, silica and mixtures thereof). Increasing the temperature above 190oWith irrational, as it leads to lower strength products, and lowering the temperature of the coolant below the 60oWith irrational because of the increased cycle hardening products.

The application layer of the heat exchanger filled Balasta and equipped with top odoptacii (60-190oC), then the pipeline is collected and used as directed in the chamber for steaming products.

Use as ballast loaded in the heat exchanger, balls or cylpebs faction 5-30 mm provides high surface evaporation films of water flowing into the heat exchanger from the top. Reducing the size of the ballast below 5 mm significantly increases the hydraulic resistance of the heat exchanger and the energy from the blast, and the increase in the size fraction weight above 30 mm significantly reduces the specific surface weight and performance of the heat exchanger, which is irrational.

The invention is further explained specific variants of its implementation with reference to the accompanying drawing, which shows the flow diagram and installation for the manufacture of concrete and concrete products.

Installation for the manufacture of concrete and concrete products contains bins 1 for the components of the concrete mixture and binder, dispensers 2, mixer 3, the molding unit 4, a chamber for steaming 5, is connected by a pipe 6 with the generator carrier 7, is made in the form of a layer of a heat exchanger connected to the duct 8 with the furnace 9. The layered heat exchanger loaded balastik, for example, the horizontal filtering of gases through the layer of ballast, made in the form of a slit mine, filled Balasta 10, equipped with a grate bars 12, introduction 13 and outlet 14 cavities, which are respectively connected by a duct 8 to the combustion chamber 9 and the pipe 6 with the camera 5 for steaming products. The furnace 9 is equipped with burners 15 and a fan 16.

The method is carried out and the system works as follows. Fine and coarse aggregate from the bins 1 through 2 dispensers on the arrows 17 and 18 are received in the mixer 3, where the arrow 19 from the hopper 1 through the spout 2 is also astringent and the arrow 20 enters the water. In forming the node 4 by the arrow 21 serves the valve and in the direction of arrow 22 of the concrete mixture from the mixer 3. Molded product after vibration in direction of the arrow 23 is fed to the chamber for steaming 5, where the pipeline 6 and the arrow 24 serves coolant. Exhaust fluid from the chamber for steaming 5 is removed to the atmosphere by the arrow 25, and the product after completion of the curing cycle the arrow 26 sent for dismantling. Perhaps part of the exhaust fluid to return for recycling. To get coolant in the form of saturated steam flue gases to the required temperature the s flue gas fan 16 serves the surrounding air with a large excess, which regulate the temperature of the flue gases. The last arrow 27 through the duct 8 are received at the input cavity layer 13 of the heat exchanger, and then through the gaps in the grate 12 flue gases pass into the ballast layer and filtered by the arrows 28 in the horizontal direction. In the ballast layer 10 is continuously serves water from the pipe 11, and draining down the water on the surface of the ballast forms a film that is washed by the hot flue gases are cooled to a predetermined temperature and saturated with water vapor. Then the gas-vapor mixture through the gaps in the grate 12 flows out into the outlet cavity 14 and the arrow 24 is routed to a destination in the chamber for steaming 5. The temperature of the coolant regulate the amount of burned fuel, excess air and the intensity of the water layer in the heat exchanger.

The advantages of the method of manufacture of concrete and concrete products is a compact, wide range of regulatory intensity processing, negligible heat loss and lower costs for thermal processing of products.

For a better understanding of the invention will present concrete examples of the implementation of the method.

Prepare the concrete mix ill is giving two hours serves on thermal processing chamber steaming periodic actions as shown in Fig. From the generator coolant serves the flue gases saturated with water vapor at a temperature of 80oWith, and thermal processing of products produced for three hours, then raise the temperature to 120oWith and produce a heat treatment at this temperature for two hours. The product after Stripping corresponds to the standard quality.

Prepare the concrete mixture of plastic consistency and molded it the ribbed slab, which after immersion for two hours serves on thermal processing chamber steaming periodic action. From the generator coolant serves the flue gases saturated with water vapor at a temperature of 60oWith, and thermal processing of products produced for four hours, then raise the temperature to 105oWith and produce a heat treatment at this temperature for three hours.

It goes without saying that the present invention is not limited to the examples described here it is running and that there are various modifikacia and other embodiments of heat treatment of products without deviating from the scope and merits of the present invention.

AI plants of various capacities for heat treatment of concrete and concrete products flue gases, saturated water vapor. Such installations are used for reconstruction of existing and construction of new plants for the production of concrete and concrete products.

This design is characterized by high performance, low consumption of metal and refractory, compactness, simplicity, performance, low fuel consumption and electricity and increased safety.

Claims

1. The method of manufacture of concrete and concrete products, including concrete mix appropriate material composition, molding and heat treatment products at atmospheric pressure coolant in the form of flue gas, characterized in that the flue gases before thermal processing of products is saturated with water vapor when filtering the streams of water flowing in the layer of granular material.

2. Installation for the manufacture of concrete and concrete products, including batchers, concrete mixer, molding site, the camera steaming, characterized in that the generator includes gas, saturated with water vapor, coupled with camera steaming, and the generator is made in the form of a layer of a heat exchanger filled with a ballast is designed balls or cylpebs faction 5-30 mm.

 

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