CN104807690A - Preparation device and method of HF standard gas in SF6 (sulfur hexafluoride) gas - Google Patents

Abstract

The invention discloses a preparation device and method of HF standard gas in SF6 gas. The preparation device comprises a thermostatic water bath device comprising a first waterbath and a second waterbath communicated with each other, wherein a heating module and a temperature-detecting module are arranged in the first waterbath; the top of the second waterbath is sealed and a sealed inner groove for containing hydrofluoric acid liquid is arranged in the second waterbath; the front end and the back end of the inner groove are respectively connected with an air inlet pipeline and an air outlet pipeline both penetrating through the second waterbath; the outlet of the air outlet pipeline is connected with an SF6 air acidity-measuring device. The device solves the standard magnitude-transmitting problem when the SF6 air acidity-measuring device is used for measuring acidity, can directly calibrate the SF6 air acidity-measuring device to enable the SF6 air acidity-measuring device to be more accurate in measured data, has the characteristics of being short in time consumption, good in effect, convenient to use and the like, and provides a powerful safeguard for the safe operation of electrical equipment.

Description

A kind of SF 6hF Standard Gases device for formulating and method in gas

Technical field

The present invention relates to a kind of SF ₆hF Standard Gases device for formulating and method in gas, belong to electric system applied technical field.

Background technology

Sulfur hexafluoride gas has excellent insulation and arc quenching characteristic, is widely used in the electrical equipment of all kinds of high pressure, UHV (ultra-high voltage).In order to ensure the safe operation of electrical equipment, the content of all kinds of impurity composition in sulfur hexafluoride gas must be controlled, particularly there is the acid of severe corrosive to electrical equipment solid insulating material and acidic components will strictly control, wherein topmost a kind of caustic acid is exactly HF.Therefore, sulfur hexafluoride gas needs to carry out acidity detection before use, but, current SF ₆the standard method of measurement of gas acidity cannot directly be calibrated, and causes cannot judging to detect data accuracy, brings hidden danger, urgently improve to the Security Construction of electrical network and production.

Summary of the invention

For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of SF ₆hF Standard Gases device for formulating and method in gas, directly can connect SF ₆gas acidity measurement mechanism carries out calibration test to it, improves the accuracy and reliability that detect.

In order to realize above-mentioned target, the present invention adopts following technical scheme:

First the present invention discloses a kind of SF ₆hF Standard Gases device for formulating in gas, comprising: the constant temperature water bath apparatus with the first water bath and the second water bath communicated with each other, wherein, is provided with heating module and temperature detecting module in the first water bath; The top seal of the second water bath, its inside is provided with the inside groove for holding liquid HF acid, gland bonnet is provided with at inside groove top, gland bonnet can be opened to add liquid HF acid, the front-end and back-end of described gland bonnet are attached across air inlet pipeline and the outlet pipe of the second water bath, the outlet of described outlet pipe and SF respectively ₆gas acidity measurement mechanism is connected.

Preferably, aforementioned first water bath and the second water bath are provided with a connecting pipe between nearest two side, and connecting pipe near the top of constant temperature water bath apparatus, thus makes the first water bath be communicated with the second water bath.

Further, between aforementioned first water bath and the second water bath, connect an ebullator, to guarantee that the temperature of the first water bath and the second water bath balances as early as possible.

Further, aforementioned ebullator is connected on the two side of the first water bath and the second water bath lie farthest away, and near diapire, the circulating effect of ebullator can be made so optimum.

Particularly, aforementioned temperature detection module is platinum resistance.

Preferably, aforementioned air inlet pipeline installs a flow control valve.

As a further improvement on the present invention, in inner tank, be provided with a ventilated membrane at the ullage of liquid HF acid, pass through to stop liquid hydrofluoric acid.

In addition, the invention also discloses and utilize aforesaid device for formulating to prepare SF ₆in gas, the method for HF Standard Gases, comprises the steps:

S1, in constant temperature water bath apparatus, hold water, start ebullator, by heating module, constant temperature water bath apparatus is heated, and carry out thermometric by temperature detecting module, stop when water temperature reaches setting value heating and carrying out temperature control, setting value is herein 40 ~ 80 DEG C, determines according to required HF gas concentration, temperature is higher, then the concentration of HF gas is higher;

S2, after equalized temperature, the liquid HF acid in the inside groove of the second water bath can evaporate generation gas, now, by pure SF ₆gas passes in inside groove with constant flow velocity from air inlet pipeline, then discharges from outlet pipe, the SF of discharge ₆gas has the HF gas of normal concentration;

The outlet of S3, outlet pipe directly connects SF ₆gas acidity measurement mechanism, carries out calibration experiments to it.

In this compound method, by the water temperature that changes in constant temperature water bath apparatus with pass into SF ₆the flow velocity of gas, i.e. adjustable SF ₆the content of HF Standard Gases in gas, the gas of being discharged by alkali liquor absorption gas device for formulating, then use acid solution titration, carry out SF ₆in gas, HF standard gas concentration is quantitative; .

Usefulness of the present invention is: SF of the present invention ₆hF Standard Gases device for formulating and compound method in gas, solve and use SF ₆gas acidity pick-up unit measures typical magnitude problem of transmission during acidity, can to SF ₆gas acidity pick-up unit is directly calibrated, and makes its measurement data more accurate, has the feature such as short, effective, easy to use consuming time, for the safe operation of power equipment provides sound assurance.

Accompanying drawing explanation

Fig. 1 is SF of the present invention ₆the structural representation of a preferred embodiment of HF Standard Gases device for formulating in gas.

The implication of Reference numeral in figure: 1, the first water bath, the 2, second water bath, 3, heating module, 4, platinum resistance, 5, air inlet pipeline, 6, outlet pipe, 7, inside groove, 8, flow control valve, 9, ebullator, 10, ventilated membrane.

Embodiment

Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.

SF of the present invention ₆in gas, HF Standard Gases device for formulating can at pure SF ₆prepare the HF gas of standard content in gas, thus directly acidity content detection device is calibrated.

The structure of this device is see Fig. 1, and constant temperature water bath apparatus comprises the first water bath 1 and the second water bath 2, and both communicate with each other, and realizes being communicated with by the connecting pipe be positioned on both mutually close sidewalls, thus balanced water temperature.In the first water bath 1, be provided with heating module 3 and temperature detecting module, temperature detecting module is preferably platinum resistance 4; The top seal of the second water bath 2, splendid attire recirculated water, establish the Packed inside groove 7 for holding liquid HF acid therein, to circulating water heating, hydrofluorite evaporated.The sealing at inside groove 7 top realizes by a gland bonnet, and opening gland bonnet can add liquid HF acid in inside groove.

As shown in Figure 1, the front-end and back-end of inside groove 7 connect air inlet pipeline 5 and outlet pipe 6 respectively, and air inlet pipeline 5 and outlet pipe 6 are all through the second water bath 2, pure SF ₆gas passes in inside groove 7 from air inlet pipeline 5 with constant flow velocity, and discharge from outlet pipe 6 after the HF gas of preparation normal concentration, in Fig. 1, arrow is depicted as SF again ₆the flow direction of gas, the outlet of outlet pipe 6 and SF ₆gas acidity measurement mechanism is connected, thus realizes acidity calibration.Conveniently control air inflow, air inlet pipeline 5 is installed a flow control valve 8 with flexible SF ₆the flow of gas.

Further, in order to balanced water temperature more rapidly, an ebullator 9 is connected between the first water bath 1 and the second water bath 2, as shown in Figure 1, ebullator 9 is connected on the two side of the first water bath 1 and the second water bath 2 lie farthest away, and near diapire, the circulating effect of ebullator 9 can be made so optimum.

As a further improvement on the present invention, in inside groove 7, the ullage of liquid HF acid is provided with a ventilated membrane 10, and certainly, the height of ventilated membrane 10, lower than air inlet pipeline 5 and outlet pipe 6 position, enters SF effectively to prevent liquid hydrofluoric acid ₆in gas.

In order to understand the present invention better, to utilizing aforesaid device for formulating to prepare SF ₆in gas, the method for HF Standard Gases is introduced, and the method comprises the steps:

S1, in constant temperature water bath apparatus, hold recirculated water, start ebullator 9, heated by heating module 3 pairs of constant temperature water bath apparatus, and carry out thermometric by temperature detecting module, stop when water temperature reaches setting value heating and carrying out temperature control, setting value is herein 40 ~ 80 DEG C, specifically can determine according to required HF gas concentration, temperature is higher, then the evaporation capacity of HF is more;

S2, after equalized temperature, the liquid HF acid in the inside groove 7 of the second water bath 2 can evaporate generation gas, now, by pure SF ₆gas passes in inside groove 7 with constant flow velocity from air inlet pipeline 5, then discharges from outlet pipe 6, the SF of discharge ₆gas has the HF gas of normal concentration; So-called " normal concentration ", refers to that HF gas content (acidity) is wherein known, by the water temperature that changes in constant temperature water bath apparatus with pass into SF ₆the flow velocity of gas, also adjustable SF ₆the content of HF Standard Gases in gas, then by the gas that alkali liquor absorption gas device for formulating is discharged, then uses acid solution titration, and carry out the quantitative of HF standard gas concentration in SF6 gas, quantivative approach is the standard method in industry, does not repeat in this patent;

The outlet of S3, outlet pipe 6 directly connects SF ₆gas acidity measurement mechanism, carries out calibration experiments to it.

To sum up, SF of the present invention ₆hF Standard Gases device for formulating and compound method in gas, solve and use SF ₆gas acidity pick-up unit measures typical magnitude problem of transmission during acidity, can to SF ₆gas acidity pick-up unit is directly calibrated, and makes its measurement data more accurate, has the feature such as short, effective, easy to use consuming time, for the safe operation of power equipment provides sound assurance.

More than show and describe ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.

Claims (9)

1. a SF ₆hF Standard Gases device for formulating in gas, is characterized in that, comprising: the constant temperature water bath apparatus with the first water bath and the second water bath communicated with each other, wherein, is provided with heating module and temperature detecting module in the first water bath; The top seal of the second water bath, its inside is provided with the inside groove for holding liquid HF acid, gland bonnet is provided with at inside groove top, gland bonnet can be opened to add liquid HF acid, the front-end and back-end of described gland bonnet are attached across air inlet pipeline and the outlet pipe of the second water bath, the outlet of described outlet pipe and SF respectively ₆gas acidity measurement mechanism is connected.

2. a kind of SF according to claim 1 ₆in gas, HF Standard Gases device for formulating, is characterized in that, described first water bath and the second water bath are provided with a connecting pipe between nearest two side, and connecting pipe is near the top of constant temperature water bath apparatus.

3. a kind of SF according to claim 1 ₆in gas, HF Standard Gases device for formulating, is characterized in that, connects an ebullator between described first water bath and the second water bath.

4. a kind of SF according to claim 3 ₆in gas, HF Standard Gases device for formulating, is characterized in that, described ebullator is connected on the two side of the first water bath and the second water bath lie farthest away, and near diapire.

5. a kind of SF according to claim 1 ₆in gas, HF Standard Gases device for formulating, is characterized in that, described temperature detecting module is platinum resistance.

6. a kind of SF according to claim 1 ₆in gas, HF Standard Gases device for formulating, is characterized in that, described air inlet pipeline is installed a flow control valve.

7. a kind of SF according to any one of claim 1-6 ₆in gas, HF Standard Gases device for formulating, is characterized in that, in described inside groove, is provided with a ventilated membrane at the ullage of liquid HF acid.

8. utilize the device for formulating as described in any one of claim 1-7 to prepare SF ₆in gas, the method for HF Standard Gases, is characterized in that, comprises the steps:

S1, in constant temperature water bath apparatus, hold water, start ebullator, by heating module, constant temperature water bath apparatus is heated, and carry out thermometric by temperature detecting module, stop when water temperature reaches setting value heating and carrying out temperature control;

S2, after equalized temperature, the liquid HF acid in the inside groove of the second water bath can evaporate generation gas, now, by pure SF ₆gas passes in inside groove with constant flow velocity from air inlet pipeline, then discharges from outlet pipe, the SF of discharge ₆gas has the HF gas of normal concentration;

The outlet of S3, outlet pipe directly connects SF ₆gas acidity measurement mechanism, carries out calibration experiments to it.

9. compound method according to claim 8, is characterized in that, in step S1, setting value is 40 ~ 80 DEG C, determines according to required HF gas concentration.