SU913151A1 - Plant for combustion product investigation - Google Patents

Description

The invention relates to the design of installations for the analysis of combustion products and can be used to study the combustion products of non-metallic polymeric materials.

Known installations for the study of the toxicity of combustion products, consisting of a chamber. In the heating chamber combustion or thermal decomposition of the material, _0} pomeschav- forward in a quartz tube takes place under the influence of heat flow from the flame of gas burners, capacity control which allows study in the temperature range 350 750 ° C + 01.

Also known installation drya research products of combustion nonmetal materials comprising germanium _w metichesky box, with electric tube furnace, a conduit for supplying gas, rheometer placed on line before the tubular

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oven, and aerosol and sorption purification devices G 2}.

The disadvantages of the known installations are that, during operation, it does not protect the experimenter and the environment from the effects of highly toxic products of thermal decomposition of polymeric materials, does not allow simultaneous toxicological studies and analysis of gases and aerosols, forming; material, which does not have the ability to regulate the concentration of gases supplied to the shutter chamber, has a low temperature limit for the study of the processes of destruction of materials.

The purpose of the invention is to conduct toxicological and sanitary-chemical studies of combustion products in experimental animals in safe for staff conditions.

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This goal is achieved by the fact that the installation is equipped with an atrac chamber, placed in the box and connected to the pipeline, and the furnace is installed on the pipeline in front of the box, with the devices for aerosol and sorption cleaning connected to the seed chamber. Additionally, it is equipped with a three-way valve installed on the pipeline in front of the seed chamber, which is equipped with fittings for air sampling.

The coffer is a flow diagram of the installation, a partial section.

Installation for the study of combustion products consists of a rheometer 1 connected by a pipe with a check valve (nipple) 2 placed in it, which serves to pass air in one direction from the room to the heating chamber and to prevent the release of toxic gases of destruction into the room, with a quartz tube 3, in which a boat 1 ″ is installed with a sample placed in a heating chamber 5 having an electric heater 6 and a thermal control unit 7. The quartz tube 3 through a three-way valve 8 is connected by means of a nozzle to a seed chamber 9 "where cage 1 is installed (1 with experimental animals. The chamber is equipped with a fan 11, for even distribution of combustion products in the chamber volume, as well as fittings 12. Through crane 8 and fittings 12 carry out sampling of the products of destruction for analysis from different points of the chamber. The seed chamber 9 is placed in a heat chamber 13 with a capacity of 800 liters. The air exchange rate in the installation is monitored by means of a 1st pressure pipe-gauge attendants, as well as the premises of non-metallic materials from pollution by combustion products.

To monitor its work on the front wall of the chambers (heat chamber 13 and the seed chamber 9) two viewing windows are installed. Under the observation windows are clips 15 for rubber gloves. The installation is connected through three-way taps 8, and the duct 16 and 17 with the aerosol filter 18, the rotameter 19 ”with the sorption filter 20 and the blower 21, which is located outside the wall of the building 221.

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Installation work is as follows

Using the thermal control unit 7 in the heating chamber 5, having an electric heater 6, in which the quartz tube 3 is placed, sets the required operating temperature. A quartz tube 3 is connected by a branch pipe with a check valve (nipple) 2 placed in it with a rheometer 1 and through a three-way valve 8 with a seed chamber 9 ”in which cell 10 with experimental animals is placed on the eve. The seed chamber 9 is installed in the 800-liter chamber 13. The blower 21, located outside the wall of the building 22, is turned on by pressing the “Start” button on the laboratory board and ventilates the heat chamber 13. The air flow in the system (quartz tube 3 - the seed chamber 9) is set according to indicator rheometer 1 in a wide range of 0.2 - 15 l / min When the heating chamber 5 reaches a predetermined temperature in the center of the quartz tube 3, install a quartz boat 4 with a sample of the test material and turn the crane 8 through the holder 15 to the position In which the combustion products flow in one direction directly into the seed chamber 9. The air in the seed chamber 9 moves with the thermal destruction products using a fan 11. The valve 8 and fitting 12 take samples of the combustion products for analysis from different parts of the seed chamber 9. After conducting sanitary-chemical and toxicological studies, the installation is ventilated by turning three-way valves 8 through air ducts 16 and 17 connected to a rotameter 19 and cleaned of toxic compounds with an aerosol filter 18 and a sorption filter 20 when pulling air through them of the seed chamber 9 with the help of a blower 21. The rate of air exchange in the installation is controlled using a pressure gauge 14 and a rotameter 19.

The proposed installation for the study of the effects of combustion products of non-metallic materials allows these studies to be carried out, ensuring complete safety for staff. In addition, the proposed installation allows

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It makes it possible to simultaneously conduct toxicological and sanitary-chemical studies, thereby increasing the efficiency of using equipment. Finally, the proposed device enables to carry out controlled supply of air, combustion products comprising ,, in a seed chamber and provides research ranging tempera- 'tures 0 0 - 1500 ^° C,

Claims (2)

1. Installation for the study of combustion products of non-metallic materials, including a sealed box, a tube furnace with electric heaters, a pipeline for supplying gas, a rheometer placed on the pipeline in front of the tube furnace, and an aerosol and sorption cleaning device, 20 characterized in that conducting toxicological and sanitary-chemical studies 913151 combustion products on experimental animals in safe for staff conditions; it is equipped with a seed chamber placed in box 5 and connected to the pipeline, and the furnace is installed in the pipeline in front of the box, with the devices for aerosol and sorption cleaning connected to the seed chamber. 2. Installation under item 1, characterized by the fact that it is equipped with a three-way valve installed on the pipeline in front of the seed chamber, which is equipped with mtutsemi frames for air sampling. . "