RU69247U1 - GAS MIXTURE DOSING DEVICE - Google Patents

Abstract

The utility model relates to measuring technique. Applicable for calibration and calibration of gas analyzers. The technical result of the utility model is to increase the accuracy of generating a gas mixture containing a pair of hydrochloric acid, or ammonia, or chlorine. The device comprises a gas mixture dosing device with an additionally introduced stabilization device. The stabilization device contains: inlet and outlet nozzles, an air duct inside a massive body cooled by a Peltier module element and additional elements. Options for the execution of some elements of the cooling stabilization device. 1 n.a.s. f-ly, 2 z.p. f-ly, fig. 1.

Description

The utility model relates to measuring technique - methods and devices for the functioning of gas analyzers. It is used for calibration and calibration of gas analyzers.

A device for dispensing a gas mixture containing a discharge device, a dispenser, throttling devices, an evaporation device, a carrier gas, gas pipelines, (l.1, RF patent for utility model No. 21662, BI No. 3, published January 27, 02)

The Peltier effect is known (l.2, TSB, edition 3, v.19, Moscow, publishing house "Soviet Encyclopedia, 1975), accompanied by the release or absorption of heat during the passage of electric current through the contact of two different semiconductors. One surface of the Peltier element it cools, the other surface of the element heats up.The Peltier element is controlled through the magnitude and direction of the current through the layer of two semiconductors.

Industrial Peltier elements are known.

Known chlorine generator GH-120, producing a gas mixture of chlorine with air, containing chlorine in a mass fraction of from 0.5 to 22 mg / m ³ with a relative error in maintaining the chlorine content, not more than ± 10%. [l.3, "InformAnalytics" catalog, p. 32, "Chlorine generators", St. Petersburg, 2003]

However, gas mixture dispensing devices are needed to verify and calibrate gas analyzers with a smaller relative error of chlorine content of up to 5%. For this purpose, a new device for dispensing a gas mixture is proposed.

A disadvantage of the known device [l.1] for dispensing a gas mixture, adopted as a prototype, that the input stream of the gas mixture has an ambient temperature that varies over a wide range (from + 10 ° C to + 50 ° C).

In order to increase the accuracy of dosing the gas mixture to 5% during calibration and calibration of gas analyzers and to eliminate the dependence of the percentage on the influence of ambient temperature when passing through the evaporation device, a new design of the utility model of the gas mixture dosing device is proposed.

For stable dosing of the gas mixture flow at various ambient temperatures, a new device is proposed containing the old device [l.1] plus an additional cooling stabilization device.

A new utility model of a device for dispensing a gas mixture contains a pressure vessel, a dispenser, a throttling device, an evaporation device, a carrier gas, while the pressure vessel is designed as a compressor supplying carrier gas (air) under stable overpressure, the dispenser as an air stabilizer, the evaporation device is made in the form of a sealed flask made of transparent glass or plastic, inert to the aqueous solution in it and the vapor of the gas mixture, and the inlet tube of the evaporation device and the second end is removed from the space above the solution, where partially partial gas vapors are directed by excess air pressure into the ejector, the entire evaporation device is placed in a thermostat to exclude the influence of ambient temperature, the first gas path containing a compressor, stabilization device - cooler, throttle, check valve , the inlet tube of the evaporation device, gas vapor above the aqueous solution, the outlet tube, ejector, the outlet line of the gas mixture, two more streams are introduced into the ejector Carrier gas: first - undrained

air through the tract from the compressor through the second stabilizer, the second throttle, the first tee into the ejector; the second is the dried air along the path from the compressor through the third stabilizer, the third throttle, a dehumidifier, a tee into the ejector, from which the mixture of air (carrier gas) and the detected gas can be sent for analysis to the gas analyzer, or for calibration and calibration of the gas analyzer.

The stabilization device contains:

1 - device stabilization of the input stream by gas temperature

2 - air mixture inlet (inlet pipe)

3 - output of the air mixture (outlet pipe)

4 - the duct housing of the device

5 - lateral insulating covers

6 - duct of a certain length

7 - cooling device of the Peltier module element

8 - Peltier element

9 - the first electrical connector for electrical power of the Peltier element

10 - radiator of the Peltier element

11 - fan blowing radiator

12 - second electrical connector for electric fan power

13 - surface insulation of the housing and duct

14 - heat-reflecting insulating screen (aluminum foil)

The stabilization device for the gas mixture dosing device is shown in Fig. 1.

The gas mixture dosing device of increased accuracy up to 5% contains the gas mixture dosing device according to the patent [l.1], the gas inlet stream of which is cooled by means of a stabilization device using the Peltier element, which enters the first gas path, into the evaporation device.

The device 1 stabilization-cooling the temperature of the inlet gas stream contains an inlet and outlet pipe 2,3 of the gas stream, the housing 4 stabilization device, side heat-insulating covers 5, the duct 6 of a certain length inside the housing. Airflow is cooled through the housing in which the duct is located. A Peltier module element 8 is mounted in the housing; cooling is carried out through its heat-cooled surface. To provide electrical power and control the Peltier element, an electrical connector 9 is made. The reverse side of the Peltier element is heated accordingly. For the purpose of cooling the fuel side and the entire casing from heating, a Peltier element radiator 10 is mounted on the casing, which is further cooled by a fan 11, which in turn is also mounted on the casing 4, while the air flow from the fan 11 flows freely through the channels of the radiator 10 around the heating fuel surface Peltier element. To ensure electrical power and fan operation, an electrical connector 12 is installed.

So that the case does not heat up from the ambient temperature, the massive case 4 and the air duct are covered from the outside with an additional heat-insulating layer 13 and a heat-reflecting screen 14 made of aluminum foil, and are also equipped with heat-insulating covers 5 on the side.

The operation of the gas metering device:

The compressor pumps the air mixture out of the environment.

It is possible that the ambient temperature ranges from +15 to + 35 ° C. At elevated ambient temperatures (15-35) ° С, the air entering the evaporation device, despite the existing temperature control of the actual evaporation device (aqueous solution), affects the temperature of the vapor of the solution located at the top of the flask. As a result, the concentration of vapors

the solution in the evaporation device changes. To exclude the influence of relatively high ambient temperatures, the inlet stream from the compressor must be additionally cooled and stabilized at a temperature of 14-16 ° C. For this purpose, a stabilization-cooling device for the inlet air introduced into the path of the evaporating device by the heat-absorbing side of the Peltier module element was introduced by passing an electric current through the Peltier element from the power source through the first electrical connector. At the same time, we cool the fuel side through a radiator, a fan connected to the power supply by the second connector.

As a Peltier module element, an element TEC 1-127080-50, or TEC1-127120-50 of TWN company, or CP1.0-127-0.5 L of Rubezh Enginee CO LTD company [l.4.5] was used.

As a fan, we used a cooler for AMD Pentium III CuD 725 from EVER, or SI3-610 cooler from EVER, or IF-0825B1HR from JAMICON KATMET Eletctronic Co 12 volts; 0.19 A [l.4. Catalog "Plane" Electronic Components ", 2004].

The new design of the gas mixture dosing device further comprises a stabilization-cooling device for the inlet gas mixture, which stabilizes the gas carrier inlet stream through the evaporation device in temperature and allows stabilizing the vapor flow of hydrochloric acid, ammonia, and chlorine in the gas mixture obtained through the vaporization device, i.e. dosing.

The new design of the gas mixture dosing device is applicable for calibration and calibration of gas analyzers of hydrochloric acid, chlorine, and ammonia vapors.

Literature

1. Certificate for utility model of the Russian Federation No. 21622, application No. 2001124958, priority 13.09.2001, published BI No. 2-2002 01/27/2002. "Gas metering device."

2. TSB, edition 3, t.19, Moscow, publishing house "Soviet Encyclopedia", "Peltier Effect", 1975.

3. Product catalog "Inform-Analytics", St. Petersburg, 2003, Chlorine Generator GC-120, p. 32.

4. Catalog "Electronic Components Peltier Modules, Fans", "Plane", 2004, p. 156, 158.

5. Catalog "Rubezh Engineering Co. LTD" Peltier module CP1, 0-127-05L.

Claims (3)

1. The device for dispensing a gas mixture, characterized in that it additionally introduced a device for stabilizing the cooling of the inlet stream of the gas mixture coming from the compressor at various ambient temperatures, the stabilization device comprising an inlet and outlet nozzles for the input and output of the gas mixture connected to a certain air duct lengths made inside in a massive metal case and heat-insulating covers, the metal case of the device is cooled by a heat-absorbing surface of thermoelectric Peltier module element, another heat-generating surface of the Peltier module element is connected to the housing and to a metal radiator, additionally cooled by the air flow created by the fan, the Peltier module element is electrically connected to the electric power supply through the first connector, the fan is electrically connected to the electric power supply to the second connector , the air duct and the housing are additionally surface insulated from the external environment with a heat insulating layer and a heat reflecting screen, carrier gas (air) from the compressor enters the inlet of the cooling stabilization device, and the cooled stream of the gas mixture from the outlet of the cooling stabilization device enters through the dispenser, the evaporation device, to the ejector of the dispensing device. 2. The device according to claim 1, characterized in that the Peltier element TEC-1-127080-50 of TWN company, or TEC-1-127120-50 of TWN company, or CP-1,0-127 is used as the Peltier element-module -0.5 L from Rubezh Engineering Co LTD. 3. The device according to claim 1, characterized in that the cooler is a LED cooler LED-725 from EVER, or SI3-610 from EVER, or IF 0825B1HR from Jamicon Kaimei Electronic Co, 12V; 0.19A.