RU2134244C1 - Liquid glass production method and reactor - Google Patents

Abstract

FIELD: liquid glass production process, which may be used in construction industry, petroleum production and other branches of industry. SUBSTANCE: method involves solving impure sodium disilicate in water while heating and exposing to field; exposing water to continuous microwave field with constant electromagnetic wave. Reactor has housing, thermostatic control and mixing systems, branch pipes and hole. Water supply branch pipe is made two-layer, with outer metal layer and opening for connecting with waveguide-microwave field source and inner low loss dielectric layer. Water supply branch pipe is mounted on reactor housing or closure. Such construction allows liquid glass with improved filterability to be produced. EFFECT: reduced time consumed for production of liquid glass, improved quality of liquid glass, increased yield per unit of equipment and reduced power consumption. 4 cl, 1 dwg, 1 tbl

Description

 The invention relates to a technology for the production of liquid glass used in the construction, oil and other industries.

A known method of producing liquid glass by dissolving a silicate block at normal pressure and a temperature of 92-98 ^o C for 3-3.5 hours (1).

 The known method is characterized by a long duration of the process, the presence of a sufficiently large content of insoluble precipitate.

 Closest to the invention in technical essence is a method for producing liquid glass by dissolving a silicate block in water by heating with simultaneous exposure to an alternating electric field of 4-8 V / cm (2).

 The known method leads to an acceleration of the process of dissolution of the silicate block, however, the use of alternating current as an activator of water in the reactor is dangerous, and therefore the method has not found application in industry.

 A stationary autoclave is known for dissolving a silicate block containing a container operating under overpressure, hatches and nozzles for loading ingredients and unloading liquid glass (3).

 However, the known device does not provide a high dissolution rate due to the lack of mixing devices.

 Closest to the invention in technical essence is a reactor containing a housing with temperature control and mixing systems, hatches and nozzles for loading ingredients and the removal of water glass (3).

 A reactor of this type does not allow to intensify the process of dissolving a silicate block due to insignificant in magnitude and influence of factors on the dissolving mass and high energy consumption on the process.

 The invention solves the problem of reducing the time of receiving liquid glass, increasing the removal of products from a unit of equipment, improving the filterability of liquid glass, reducing energy consumption.

 The problem is solved in that in the method for producing liquid glass by dissolving a silicate block in water when heated and exposed to a field, according to the invention, when exposed to a field, the water is irradiated with a continuous microwave field with a constant electromagnetic wave.

 The problem is solved in that the reactor for producing liquid glass, including a housing, thermostatic and mixing systems, nozzles and a manhole, according to the invention, has a water supply nozzle made two-layer with an outer metal layer with an opening for connection to a waveguide — a microwave field source and an inner layer of low loss dielectric. The water supply pipe may be made on the body or cover of the reactor.

The features of the object of the invention "method" are the following:
1. dissolution of the silicate block in water when heated and exposed to the field;
2. when exposed to a field, irradiation of water with a continuous microwave field;
3. when exposed to a field, irradiation of water with a continuous microwave field with a constant electromagnetic wave.

 Sign 1 is common with the prototype, signs 2, 3 are the essential distinguishing features of the invention.

The features of the object of the invention "device" are the following:
1. housing;
2. temperature control system;
3. mixing system;
4. branch pipes;
5. sunroof:
6. the implementation of the two-layer water supply pipe with the outer metal layer with an opening for connection with the waveguide - the source of the microwave field and the inner layer of the dielectric with low losses;
7. The water supply pipe may be made on the body or cover of the reactor.

 Signs 1-5 are common with the prototype, sign 6 is an essential hallmark of the invention, sign 7 is a particular hallmark of the invention.

SUMMARY OF THE INVENTION
The production of liquid glass is characterized by the duration of the process, high energy intensity, low yield, the resulting liquid glass has poor filterability.

 The invention solves the problem of reducing the time of receiving liquid glass, increasing the removal of products from a unit of equipment, improving the filterability of liquid glass, reducing energy consumption.

 It was found that the treatment of water in the reactor nozzle with a microwave field reduces the dissolution time of a silicate block when producing liquid glass, and the composition of silicates does not significantly affect the laws of the process. In the experiments, the continuous microwave field had a constant electromagnetic wave, which ensured the complete activation of the water passing through the pipe. Activation of water increases the solubility of the silicate block and, as a result, reduces the amount of precipitate in the reaction mass. Simultaneously with the activation of water when exposed to a microwave field, the water is heated due to dielectric losses.

 The nozzle of the reactor for supplying water is made two-layer. The inner pipe of the nozzle along which the process water moves is made of solid dielectric material with low losses (transparent to the microwave field). The outer pipe of the nozzle is made of metal, performs the function of a structural element and ensures the closed circuit of the microwave field. The tightness of the connection of the outer pipe of the pipe through the hole in it with the waveguide, the casing and the pipeline for supplying water to the reactor is ensured by welding of the docking nodes and transverse waveguides.

 The drawing shows a reactor for producing liquid glass.

 The reactor contains a housing 1, a temperature control system 2, a stirring system in the form of a stirrer with a drive 3, a water supply pipe 4, a hatch 5, a pipe for unloading liquid glass 6. The water pipe 4 is made of a two-layer with an outer metal layer 7 having an opening for connection with waveguide 8. The inner layer 9 is made of a dielectric with low losses. The waveguide 8 is hermetically attached to the outer layer 7 of the nozzle 4. The mixer 3 and the hatch 5 are placed in the lid 10 of the reactor, in which the nozzle 4 can be placed (not shown in the drawing).

 The reactor operates as follows.

 The housing 1 is thermostated and water is supplied into it through the pipe 4. The microwave field generated by the generator (not shown in the drawing) through the waveguide 8 irradiates the process water moving inside the layer 9 of the pipe 4, activates it and additionally heats it. After loading a finely divided silicate block with simultaneous stirring, hydrothermal dissolution and liquid glass are obtained. Dissolution time due to water activation is reduced. The microwave field passes almost without loss through the inner dielectric layer and exposes the water to the microwave. The outer metal layer 7 of the pipe 4 in combination with the waveguide 8 and the pipeline supplying water (not shown in the drawing) are sealed, which creates a safe process environment.

 An example of a specific implementation.

Liquid glass is obtained in a reactor with a volume of 0.63 m ³ equipped with a two-layer water supply pipe 4. The inner layer 9 is made of solid quartz glass with an inner diameter of 12 mm, quartz glass grade KU-1 with a dielectric loss of 3.8. The outer layer 7 is made of a steel pipe, and a hole is cut in it for docking with the waveguide 8. The joints for sealing are welded. This ensures the safety of the reactor and the absence of special safety requirements during the process.

240 liters of water with a temperature of 80 ^o C are poured into a reactor with thermostatic control systems 2 and mixing 3 turned on. For the water supply period, a KIE-5 microwave generator with a power of 5 kW and a vibration frequency of 2450 MHz is included. The microwave field through the waveguide 8 acts on water, activating it and additionally warming up to a temperature of 90 ^o C. After the water is charged, the generator is turned off and a dispersed silicate block with a particle size of 20-150 mm in the amount of 180 kg is loaded into the reactor under stirring conditions. Hydrothermal dissolution is carried out at a reaction temperature of 90 ^° C. The time to complete the dissolution of the silicate block is controlled by the density of the silicate solution.

In the case of using ordinary process water (experiments 2,4,6), the water supplied through the pipe through pipe 4 had a temperature of 90 ^o C, there was no effect on the water of the microwave field.

 The process parameters, the density of water glass and the amount of insoluble precipitate under various conditions of exposure to a continuous microwave field are given in the table.

 From the table it follows that all types of silicates used are dissolved in hydrothermal conditions faster, if the water is exposed to the microwave field and activated before being fed to the reactor in the water supply pipe 4, the dissolution time is reduced by 1.5-1.8 times compared to using conventional technical water. The amount of insoluble precipitate in the reaction mass is reduced, which leads to improved filterability and an increase in the quality of liquid glass. The use of a constant microwave field ensures the complete activation of water passing through the pipe 4 and entering the dissolution reactor.

 Thus, carrying out the process of dissolving silicates upon activation of water by the action of a continuous microwave field allows one to reduce the time of dissolution of silicates and to reduce the amount of insoluble precipitates in the reaction mass. The modernization of the reactor is simple in execution, and its advantages make it possible to increase product removal per unit of equipment, reduce energy consumption for hydrothermal dissolution, improve the filterability and pumpability of liquid glass in subsequent operations, and improve the quality of liquid glass.

Sources of information taken into account when preparing the application
1. USSR author's certificate N 415233, published. 1974.

 2. Copyright certificate of the USSR N 783227, published. 1980.

 3. V.I. Korneev, V.V. Danilov. Liquid and soluble glass. St. Petersburg: Stroyizdat, 1996, p. 155-171.

Claims (4)

 1. A method of producing liquid glass by dissolving a silicate block in water when heated and exposed to a field, characterized in that when exposed to a field, the water is irradiated with a continuous microwave field with a constant electromagnetic wave.  2. A reactor for producing liquid glass, including a casing, thermostatic control systems, mixing systems, nozzles and a hatch, characterized in that the water supply nozzle is made two-layer with an external metal layer with an opening for connection to a waveguide - a microwave field source and an inner layer of a low dielectric losses.  3. The reactor according to claim 2, characterized in that the water supply pipe is made on the reactor vessel.  4. The reactor according to claim 2, characterized in that the water supply pipe is made on the reactor cover.

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