RU2458510C2 - Method of fume generation in inert gas medium with inductive energy input - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention is intended for usage in food industry and relates to a method for generation of fume used for production of smoke-flavoured products. During the method implementation fume generation is performed by way of wood saw dust pyrolysis within a closed space restricted for access of oxygen. One performs continuous co-stirring of the saw dust and dispersed electrically conductive particles and filtration of a mixture of air and an inert gas through them. The inert gas used during fume generation is represented by nitrogen. It is produced by way of baromembrane separation of air on semi-permeable membranes under a pressure of 0.4-4 MPa. Input of energy to the wood saw dust is performed from the dispersed electrically conductive particles mixed with the saw dust which particles release heat as a result of their inductive heating under the action of alternating electromagnetic field.

EFFECT: invention ensures high smoke generation temperatures, exclusion of the wood saw dust inflammation danger as well as a high degree of fume formation and increase of fume density as a result of homogeneity, volumetric and targeted input of energy to wood saw dust particles.

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Description

The invention relates to the food industry, in particular to methods of smoke generation and can be used in the food industry in the manufacture of products with the aroma of smoke.

The closest in technical essence and the achieved result is a method of obtaining a smoking environment in a thermocopper installation [RF Patent No. 2266658, A23B 4/044, publ. December 27, 2005], including the generation of carbon dioxide, mixing it with air and heating the resulting smoke mixture, carried out in one housing.

The disadvantage of this method is the low temperature of smoke generation due to the high risk of ignition of sawdust in the presence of oxygen contained in a mixture of inert gas with air, which does not provide a high rate of smoke formation, as well as its low density due to the unevenness and locality of energy supply to the particles of sawdust.

An object of the invention is to develop a smoke generation method that allows for high smoke generation temperatures by eliminating the risk of wood sawdust ignition as a result of using a mixture of inert gas with air with a low oxygen content, as well as a high rate of smoke formation and an increase in its density due to uniformity, volumetric and targeted energy supply to particles of wood sawdust.

The technical task of the invention is achieved by the fact that in the method of smoke generation in an inert gas environment, characterized in that they generate inert gas, enrich it with air, smoke generation by pyrolysis of sawdust in a confined space, limited for oxygen access, it is new that when smoke generation inert gas use nitrogen obtained by baromembrane separation of air on semipermeable membranes at a pressure of 0.4-4 MPa, and the smoke generation process is carried out with inductive supply m energy at constant joint mixing sawdust and dispersed conductive particles, and filtering through them a mixture of air and inert gas, wherein the supply of energy to the wood chips is carried out by mixed with them dispersed conductive particles that emit heat as a result of induction heating by the alternating electromagnetic field.

The technical result of the invention is to develop a smoke generation method that allows to ensure high smoke generation temperatures by eliminating the risk of wood sawdust ignition as a result of using a mixture of inert gas with air with a low oxygen content, as well as a high rate of smoke formation and an increase in its density due to uniformity, volumetric and targeted energy supply to particles of wood sawdust.

Figure 1 shows a diagram of the process of smoke generation in an inert gas medium with inductive supply of energy.

The method of smoke generation in an inert gas medium with inductive supply of energy is as follows.

First, nitrogen is generated, which is obtained by baromembrane separation of air on semipermeable membranes under a pressure of 0.4-4 MPa, and then enrichment of the air going to smoke generation by pyrolysis of sawdust occurs.

The smoke generation process is carried out in a confined space, limited for oxygen access by filtering through a layer of sawdust a mixture of air enriched with nitrogen with constant joint mixing of sawdust and dispersed electrically conductive particles.

In this case, energy is supplied to the wood sawdust from dispersed electrically conductive particles mixed with them, which produce heat as a result of their induction heating under the influence of an alternating electromagnetic field.

The method is illustrated by the following examples.

Example 1 (prototype)

A method of producing a smoking environment in a thermal smoking installation includes generating carbon dioxide, mixing it with air and heating the resulting smoke mixture, carried out in one housing.

In this method, there should be a low smoke generation temperature not exceeding 350 ° C due to the high risk of ignition of sawdust in the presence of oxygen contained in a mixture of inert gas with air, which does not provide a high rate of smoke formation, as well as its low density due to unevenness and localities of energy supply to sawdust particles.

Example 2

The method of smoke generation by pyrolysis of wood sawdust is carried out in an inert gas medium, which is nitrogen, obtained by baromembrane separation of air on semipermeable membranes under a pressure of 0.4-4 MPa and is carried out in a confined space, limited for oxygen access with constant joint mixing of sawdust and dispersed electrically conductive particles and filter through them a mixture of air and inert gas, while the energy is supplied to sawdust from mixed dispersed particles conductive particles that produce heat as a result of their induction heating under the influence of an alternating electromagnetic field.

Due to the limited access of oxygen to the smoke generation zones, i.e. to the places of interaction of wood sawdust and highly heated electrically conductive particles, the temperature of the latter is close to the maximum permissible, i.e. to 400-450 ° C, and their uniform distribution among themselves by mixing provides a high density of the smoking environment.

The method of smoke generation in an inert gas medium with inductive energy supply has the following advantages:

- the use of nitrogen during the smoke generation by pyrolysis of wood sawdust as an inert gas obtained by baromembrane separation of air on semipermeable membranes under a pressure of 0.4-4 MPa allows you to get the necessary mixture from air with a high nitrogen content for use in smoke generation;

- the implementation of the pyrolysis of sawdust in a confined space, limited for oxygen access, allows you to create a high smoke generation temperature by eliminating the risk of ignition of sawdust as a result of using a mixture of inert gas with air with a low oxygen content, which ensures a high rate of smoke formation;

- constant joint mixing of sawdust and dispersed electrically conductive particles and filtering through them a mixture of air and inert gas, when energy is supplied to wood sawdust from dispersed electrically conductive particles mixed with them, generating heat as a result of their induction heating under the influence of an alternating electromagnetic field, it allows to increase the density of smoke due to the uniformity, volumetric and targeted energy supply to the particles of sawdust.

Claims (1)

A method of smoke generation in an inert gas environment, characterized in that it generates an inert gas, enriches it with air, smoke generation by pyrolysis of sawdust in an enclosed space, limited for oxygen access, characterized in that nitrogen obtained by baromembrane is used as inert gas for smoke generation air separation on semipermeable membranes under a pressure of 0.4-4 MPa, and the smoke generation process is carried out with inductive supply of energy with constant joint mixing about Ilok and electroconductive particles dispersed therethrough and filtering the mixture of air and inert gas, wherein the supply of energy to the wood chips is carried out by mixed with them dispersed conductive particles that emit heat as a result of induction heating by the alternating electromagnetic field.

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