SU1144042A1 - Device for measuring gas humidity - Google Patents

Abstract

A HUMANITY MEASURING DEVICE. GAS-HUMIDITY in resolution tanks, containing a chamber supplied with connections for connecting to a source of wet gas and atmosphere, installed in series between the pipes of a dry and wet thermocouple, a fan, and so on. that, in order to increase the service life, the branch pipe for connection of the chamber with the atmosphere is provided with a gate valve that overlaps the cross section of the branch pipe, in which a throttling opening is made for air leaks. (L a cha L dywH bd ig. F

Description

The invention relates to a measurement technique and can be used to measure the moisture content of gases containing particles, liquids or solids, such as smoke smoke.

Iavester is a psychrometric aspiration hygrometer for air, containing dry and wet thermometers and a fan that aspirates the thermometers of the medium under investigation. The humidity of the medium is determined based on the readings of the dry and wet thermometers based on the well-known psychometric dependencies pj.

During operation, such sensors: in a smoke environment, precipitation of airborne particles occurs (the effect is dead; iwai) and all its elements, which reduces the accuracy of measurements and reduces the service life of the moisture meter. :

The closest to the technical essence of the device is a device for measuring the moisture content of gases in hazardous tanks, containing a chamber equipped with nozzles for connection with a source of moist gas HC with an atmosphere, installed in series between nozzles dry and wet thermometers, a fan.

However, the known device has a short life,

The goal invented 1Sh is an increase in the service life of the moisture meter. The goal is achieved by the fact that, in a device for measuring the humidity of gases in vacuum tanks, containing a chamber equipped with nozzles for connection with a moist gas exchanger and with an atmosphere, dry and wet thermometers installed in series between nozzles, a fan, a nozzle for connecting the chamber with the atmosphere is provided with a choking cross-section of the nozzle with a damper, which has a throttling opening for air leaks. . Pa figs. t presents the device layout; figure 2 is a variant of the electrical circuit control the operation of the electric motor and the actuator valve

The device consists of a chamber 1 with nozzles 2 and 3, respectively. for connection with a source of wet gas and atmosphere, dry 4 and wet 5 thermometers, a tank 6 for wetting a wet thermometer, a fan 7. Thermometers and a fan are sequentially installed in a chamber with nozzles to connect it with the atmosphere and a source of moist gas. A nozzle for connection with a source of moist gas is located in front of the thermometers, a nozzle for connection with the atmosphere is behind the fan and is equipped with a valve 8 with a valve mechanism 9 having a throttling hole for air leaks, which overlaps the nozzle and the cross-sectional area of the nozzles is chosen from

where 5 is the cross-sectional area of the nozzle, m;

Q — fan capacity, m / s;

to - coefficient of consumption through the stalemate;

 - acceleration of free fall,

Y is the specific gravity of the wet gas,

H / MJ

Ap - pressure difference at the inlet and outlet of the nozzles. Pa. Contacts t1 are included in the electrical circuit of the actuator of the damper and the fan motor of the torus, respectively. A power circuit has a time relay 42 and a control key 13.

Ustoyy works as follows.

When cable 13 is open, the fan's electrical de-energizer and actuator are de-energized. The valve 8 overlaps the pipe 3 connecting the Chamber 1 with the atmosphere. Due to the rarefaction in the gas duct (tank with vacuum), there is a nickel suction of clean outdoor air through a throttling hole in the damper into the chamber and then into the gas duct. This creates an Hbtft air shutter that prevents gas from entering the chamber. As a result, during this period, contamination by particles containing elements of the device in gas is excluded. When the key 13 is closed, it supplies power to the electrodigger of the fan 7, the valve actuator 9 and the winding - relay 12 of time. At the same time, the actuator 9 opens the valve of the nozzle 3. and turns on the fan 7 and gas flows from the gas duct through the chamber, where humidity measurement is performed at this time. After a time sufficient for the measurement, the relay will turn on time 12, its contacts disconnect the power from the fan electric motor and the actuator: 9 The fan stops its operation and the valve closes the nozzle 3. The micro-suction of air reappears through the hole in the flap, which ensures the removal of residual gas in the gas duct.

Thus, the entry of: polluted gas into the chamber occurs only during direct measurements. Scientific research institute. Of humidity of t-aza, in the rest: time flowing through the camera pure

external air eliminates the effect of the deposition of particles contained in the gas on the elements of the device, which significantly increases its service life.

At the same time, a small amount of atmospheric air mixed with smoke smoke does not have an i-y effect on the properties of the latter. An experimentally tested performance of a known and proposed device when measuring the humidity of an air-smoke mixture in a tunnel smoking furnace. Indicates that the service life offered by ycTpo tCTBa while maintaining the same measurement accuracy is increased by fifty times.

The invention can be used to control the humidity of contaminated gas gases under laboratory and industrial conditions, ensures that this control is controlled and improves product quality, while at the same time increasing labor productivity ...

FIG 2

Claims (1)

DEVICE FOR MEASURING HUMIDITY OF GASES in containers with resolution, containing a chamber equipped with nozzles for connecting to a source of wet gas and with the atmosphere, installed in series between the nozzles of dry and wet thermocouples, a fan, and so on , in order to increase the service life, the nozzle for connecting the chamber to the atmosphere is equipped with a shutter blocking the cross section of the nozzle, in which a throttling hole for air intake is made. WHTnS 1 . 1144042 1