RU2119653C1 - Sample taking device - Google Patents

Abstract

FIELD: sampling apparatus. SUBSTANCE: this sample taking device can be used in chemical, metallurgical, oil refining, gas processing, construction branches of national economy for taking samples to be forwarded to automatic gas analyzers. Device is particularly suitable for industrial chromatography. Device has sample taking pipe connected with filter and trap, cooler connected by pipeline with sample taking line and compressed air source through switching valve, hydraulic seal connected by pipelines with trap and cooler, and valves installed in pipelines which connect hydraulic seal with trap and cooler. Device is additionally provided with pipeline which connects valves with line connecting cooler with switching valve. Valves are provided with pneumatic control spaces for connection with additional pipeline and throttling members for compressed air to flow through them. EFFECT: higher efficiency. 1 dwg

Description

 The invention relates to devices for sampling high-temperature dusty gases and can be used in the chemical, metallurgical, oil refining, gas processing and construction industries for sampling for automatic gas analyzers, in particular for industrial chromatography.

 A device for sampling gases containing a sampling pipe, a trap, a refrigerator, a water trap, a compressed gas purge system (see SU, copyright certificate, 1430799, class G 01 N 1/22, 1988) is known.

 However, in the known device there is a low efficiency of the cleaning system, since it does not allow to purge all the elements of the device.

 Another sampling device is known, comprising a sampling pipe connected to a filter and a trap, a refrigerator connected by a line to a sampling line and a compressed air source through a switch tap, a water seal connected by a line with a trap and a refrigerator, and valves, mounted on highways connecting the water trap to the trap and to the refrigerator (RU, patent, 2011179, class G 01 N 1/22, 1994).

 However, in the known device, the cleaning efficiency of the trap and the refrigerator is low, since the compressed air during cleaning does not pass through all the nodes of these elements, which is prevented by valves that block one of the exits of the refrigerator and the trap during purging.

 The technical result of this invention is to increase the efficiency of cleaning the elements of the device by ensuring the passage of air through all nodes of the trap and refrigerator.

 To achieve a technical result, a sampling device comprising a sampling pipe connected to a filter and a trap, a refrigerator connected by a line to a sampling line and a compressed air source through a switch tap, a water seal connected by pipelines with a trap and a refrigerator, and valves installed on the lines connecting the water trap to the trap and to the refrigerator, according to the invention is equipped with an additional line connecting the valves to the line connecting the refrigerator with a crane opening switch, and controllable valves adapted to communicate with pnevmopolostyami additional line and a throttle element for the passage therethrough of the compressed air.

 The drawing shows a General view of the device.

 The device comprises an intake pipe 3 placed in a steam-heated housing 1. A filter 2 is installed at one end of the intake pipe and the intake pipe 3 is connected to the expansion chamber 4 at the other end. A partition 7, traps 5 and 6, a reflector 8 and a pipe 11 are installed in the expansion chamber The hole 10 is made in the trap 6 for connecting it with a removable sump 9.

 The device comprises a refrigerator 15 connected by a line 25 to a sampling line 26 and a source of compressed air 27 through a faucet switch 24. The refrigerator 15 contains a water-cooled chamber 16, a removable condensate discharge chamber 17 and a removable chamber 19 with a fine filter and dehumidification. The chamber 19 of the outlet fitting 20 is connected to the highway 25. A removable condensate discharge chamber 17 through the drain pipe 18 and the valve 22 is connected to the water seal 23.

 The trap 6 through the drain pipe 13 and the valve 21 is connected by a pipeline with a water lock 23, and through the fitting 12 and the line 28 with a refrigerator 15.

 The expansion chamber 4 from the side opposite to the connection of the intake pipe 3 to it is provided with a cover 14.

 The device is equipped with an additional line 29 connecting the valves 21 and 22 with the line 25. The valves 21 and 22 are made with controlled pneumatic cavities for communication with the additional line 29 and with throttling elements for the passage of compressed air through them.

 The operation of the device is as follows.

 The device is partially inserted into the space of the furnace 30 (reactor, gas duct) by the end of the housing 1. In this case, the sample gas sample containing sublimates of metals, dust, elemental sulfur and water vapors is filtered through filter 2, and the sample with the remaining sulfur and water vapors enters into the gas sampling pipe 3 and then into the first trap 5 of the expansion chamber 4, where sulfur is condensed by lowering the temperature, droplets of which are supplied with the gas stream through the opening 10 to the removable sulfur collector 9, where they accumulate, and the remaining sulfur vapor from the gas flows and with water vapor through the pipe 11 fall into the trap 6, in which the temperature is even lower and due to contact with the large surface of the reflector 8, all remaining sulfur is condensed in the form of an aerosol, which is formed with partially condensed water into an emulsion flowing through the drain pipe 13 into a water seal 23. A sample consisting of components of the gas mixture and water vapor through the nozzle 12 is sent to the refrigerator 15, to its condensate discharge chamber 17 and through the drain pipe 18 to the air trap 23. And the other part of the sample goes up to the filter p 19 fine cleaning and drying, is freed in the refrigerator from the remnants of water vapor and through the nozzle 20 goes to the gas analyzer through the tap switch 24. At this time, the valves 21 and 22 are open.

 Periodically, depending on the technical parameters of the process in which this device is used (dust, the amount of elemental sulfur, etc.), it is cleaned.

 It is carried out as follows. Depending on the need for the cleaning frequency, a time is set at which the crane switch 24 is moved to another position. In this case, air is blown through the refrigerator 15, traps 5, 6 of the condensate drain line, valves 21, 22, and all this is directed to the hydraulic lock 23, since the valves 21, 22 are automatically transferred to the throttling position by performing them with a pneumatic control cavity. At the same time, air is supplied to the hydraulic lock 23 at a lower pressure than to the filter, which does not reduce the efficiency of filter cleaning.

 After that, the valve 24 is transferred to the initial position, the valves 21, 22 are transferred to the initial position, open the drain line, a sample of the analyzed mixture enters the device for analysis along line 26.

 Periodically, depending on the presence of sulfur, sulfur is removed from the sump 9.

Claims (1)

 A sampling device comprising a sampling pipe connected to a filter and a trap, a refrigerator connected by a line to a sampling line and a compressed air source through a switch tap, a water seal connected by the trap and a refrigerator to the pipes, and valves installed on the pipes connecting the water seal with a trap and a refrigerator, characterized in that it is equipped with an additional line connecting the valves to the line connecting the refrigerator with a switch tap, and the valves are made with control pneumatic cavities for communication with an additional line and throttling elements for the passage of compressed air through them.