CN201348580Y

CN201348580Y - Chlorine gas Sampler

Info

Publication number: CN201348580Y
Application number: CNU2009200173359U
Authority: CN
Inventors: 曾宪忠
Original assignee: Xinwen Mining Group Co Ltd Taishan Salt & Chemical Branch
Current assignee: Xinwen Mining Group Co Ltd Taishan Salt & Chemical Branch
Priority date: 2009-01-05
Filing date: 2009-01-05
Publication date: 2009-11-18
Anticipated expiration: 2019-01-05

Abstract

The utility model discloses a chlorine gas sampler for quantitatively measuring the micro foreign gas in the chlorine gas in the ionic membrane caustic soda production art. The sampler has a branch pipe on the chlorine gas pipe. A gas and liquid separator, a vacuum pump and a two-stage absorption bottle loaded with concentrated sulfuric acid are connected on the branch pipe in turn. The outlet of the two-stage absorption bottle is divided into two paths, one of which is connected with a sampling bladder via an gas inlet valve and the other of which is connected to the residual gas buffering bottle and the absorption bottle loaded with the sodium hydroxide via a gas outlet valve. The utility model provides the correct data for the ionic membrane electrolytic bath art, timely adjusts the technological operation, ensures the process parameter to the optimum condition and prolongs the service life of the electrolytic bath.

Description

A kind of chlorine sampler

Technical field

The utility model belongs to gas sampling device, in particular for the sampler of trace amount of foreign gas quantitative measurement in the chlorine.

Background technology

In ion film caustic soda is produced, need accurately to measure the H of trace in the chlorine ₂, O ₂, N ₂, in time grasp the ion film caustic soda production technology and whether ion-exchange membrane electrolyzer works well according to measurement data.Hydrogen content height in chlorine, the accident of easily blasting; Oxygen level height in chlorine, current efficiency is low, and pin hole appears in ionic membrane; Nitrogen content height in chlorine easily generates agene, and safety in production is had great danger.Comprehensively above-mentioned, so need in time to measure accurately, fast the H of trace in the chlorine ₂, O ₂, N ₂, so that calculate current efficiency, guarantee that technic index meets the requirements, guarantee that ionic membrane equipment normally moves, and realizes safety in production.

At present, trace amount of foreign gas generally adopts explosion method and Orsat apparatus in the measurement chlorine, and this method only is applicable to foreign gas content condition with higher in the chlorine.And when foreign gas content 2% when following, get 100 milliliters of gas chlorine and absorb the back volume of rest gas with potassium iodide the 1-2 milliliter is only arranged, so use the explosion method analysis, relative error is big, poor repeatability, and the oxygen and the nitrogen of trace can't be measured.Also having a kind of method is chlorine have been absorbed remaining foreign gas is carried out stratographic analysis, and the deficiency that this method exists is: because poorly sealed during sampling, cause in the gas transfer process sample to suffer to pollute and cause data inaccurate, error is bigger.

The utility model content

The purpose of this utility model provides a kind of chlorine sampler, when solving in the prior art quantitative measurement chlorine trace amount of foreign gas because the big technical matters of error that the imprecision of taking a sample causes.

For achieving the above object, chlorine sampler structure of the present utility model is, pick out branch pipe(tube) from the chlorine pipeline, be connected with gas-liquid separator, vacuum pump on the branch pipe(tube) in turn and the two-stage absorption bottle of the concentrated sulphuric acid is housed, the outlet of two-stage absorption bottle is divided into two-way, one the tunnel through gas admittance valve connection sampling bladders, and another road is connected to residual air surge flask and the absorption bottle that NaOH is housed through air outlet valve.

When chlorine sampler of the present utility model uses, earlier the original gas displacement in the sampler is clean with argon gas, close sampling bladders gas admittance valve and air outlet valve then; Open branch pipe(tube) and vacuum pump, the chlorine that the chlorine tube road is come out enters gas-liquid separator under the vacuum pump effect, to remove most of condensate water in the gas; The gas that comes out from gas-liquid separator enters under the vacuum pump effect in the two-stage absorption bottle, and the concentrated sulphuric acid in the absorption bottle absorbs remaining water vapor in the gas, and sample drying is purified; Open sampling bladders gas admittance valve, the gas behind the dry decontamination enters the sampling bladders, closes sampling bladders gas admittance valve then, takes off the sampling bladders and sends into gas chromatograph and carry out quantitative test.In order to improve gas separation effect, the chromatographic column of gas chromatograph is selected Vingon bead chromatographic column for use;

In order to prevent that unnecessary chlorine from entering atmosphere environment is polluted, open air outlet valve, remaining gas in the sampler is sent into surge flask and is equipped with in the absorption bottle of NaOH absorb.

The utility model has the advantages that: tight to chlorine sample collecting sampling process, and carried out repeatedly, avoided moistening chlorine that instrument is caused corrosion, reduced analytical error, measure accurately.

Tight in order to verify sampler sampling of the present utility model, one group of standard model of picked at random compares check, the content of hydrogen, oxygen and nitrogen is known in the standard model, in standard model, artificially add quantitative hydrogen, oxygen and nitrogen again, with the utility model sampler sampling back working sample recovery, measurement result such as table 1.

Table 1

The utility model is in time adjusted technological operation for ion-exchange membrane electrolyzer technology provides accurate data, guarantees that technological parameter reaches top condition, prolong electrolytic tank serviceable life, the equipment that guaranteed normally moves, and has reduced the maintenance number of times, has improved economic benefit greatly.

Description of drawings

Fig. 1 is the utility model chlorine sampler schematic diagram.

Among the figure: 1-chlorine pipeline, 2-gas-liquid separator, 3-vacuum pump, 4-two-stage absorption bottle, the 5-bladders of taking a sample, 6-surge flask, 7-absorption bottle, 8-gas admittance valve, 9-air outlet valve.

Embodiment

Further specify enforcement of the present utility model below in conjunction with accompanying drawing.

The utility model sampler as shown in Figure 1, it is to pick out branch pipe(tube) from chlorine pipeline 1, be connected with gas-liquid separator 2, vacuum pump 3 on the branch pipe(tube) in turn and the two-stage absorption bottle 4 of the concentrated sulphuric acid is housed, 4 outlets of two-stage absorption bottle are divided into two-way, one the tunnel through gas admittance valve 8 connection sampling bladders 5, and another road is connected to residual air surge flask 6 and the absorption bottle 7 that NaOH is housed through air outlet valve 9.

During sampling, earlier the original gas displacement in the sampler is clean with argon gas, close sampling bladders gas admittance valve 8 and air outlet valve 9 then; Open branch pipe(tube) and vacuum pump, the chlorine that chlorine pipeline 1 is come out enters gas-liquid separator 2 under the vacuum pump effect, to remove most of condensate water in the gas; The gas that comes out from gas-liquid separator 2 enters in the two-stage absorption bottle 4 under vacuum pump 3 effects, and the concentrated sulphuric acid in the absorption bottle 4 absorbs remaining water vapor in the gas, and sample drying is purified; Open sampling bladders gas admittance valve 8, the gas behind the dry decontamination enters sampling bladders 5, closes sampling bladders gas admittance valve 8 then, takes off sampling bladders 5 and sends into gas chromatograph and carry out quantitative test.

In order to prevent that unnecessary chlorine from entering atmosphere environment is polluted, open air outlet valve 9, the remaining gas of sampler is sent into surge flask 6 and be equipped with in the absorption bottle 7 of NaOH and absorb.

Claims

1, a kind of chlorine sampler, it is characterized in that, it is to pick out branch pipe(tube) from the chlorine pipeline, be connected with gas-liquid separator, vacuum pump on the branch pipe(tube) in turn and the two-stage absorption bottle of the concentrated sulphuric acid is housed, the outlet of two-stage absorption bottle is divided into two-way, one the tunnel through gas admittance valve connection sampling bladders, and another road is connected to residual air surge flask and the absorption bottle that NaOH is housed through air outlet valve.