CN209900770U - Ion chromatography adopts external regeneration decarbonization device - Google Patents
Ion chromatography adopts external regeneration decarbonization device Download PDFInfo
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- CN209900770U CN209900770U CN201822191556.XU CN201822191556U CN209900770U CN 209900770 U CN209900770 U CN 209900770U CN 201822191556 U CN201822191556 U CN 201822191556U CN 209900770 U CN209900770 U CN 209900770U
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Abstract
The utility model belongs to the technical field of the chemistry detects, concretely relates to ion chromatography adopts external regeneration to remove carbon device. An outlet of the carrier gas pressure reducing valve is connected with a three-way connector, one path of the three-way connector is connected with an ultrapure water leaching liquid tank, the other path of the three-way connector is connected with an external regeneration alkali liquid storage tank through an overload gas pipeline, and a regeneration liquid connecting pipe is inserted into the bottom of the external regeneration alkali liquid storage tank; the regenerated liquid connecting pipe is connected with the regenerated liquid flow-limiting pipe through the reducing joint; the regenerated liquid flow-limiting pipe is connected with a regenerated liquid connecting pipe through a reducing joint, and the regenerated liquid connecting pipe is connected with a regenerated liquid inlet of the carbonate removing device through the reducing joint; the regenerated liquid outlet of the carbonate removing device is connected with the regenerated waste liquid pipe through the reducer union. The utility model discloses when effectively getting rid of the carbonate interference in the water sample, getting rid of the influence of ammonia to ion chromatography detection baseline, anion content such as trace sulfate radical in the accurate measurement nuclear power station two return circuits contain the ammonia water sample or the water sample of the same type.
Description
Technical Field
The utility model belongs to the technical field of the chemistry detects, concretely relates to ion chromatography adopts external regeneration to remove carbon device.
Background
In order to maintain a good water chemistry environment of the secondary loop water of the nuclear power plant, the power plant adjusts the water quality by adding an alkalizer such as ammonia, ethanolamine or morpholine and the like, and the pH value of a secondary loop system is maintained between 9.4 and 10.0. Because the water sample of the system is alkalescent, during sampling and sample injection analysis in a laboratory, carbon dioxide in the air is easily dissolved into the sample and carried into the ion chromatographic analysis system. CO saturated in water at 25 deg.C2About 490. mu.g/L, while the content of chloride and sulfate ions in the sample is usually less than 2. mu.g/L. In addition to KOH, NH is also present in the suppressor outlet lye4OH or other alkaline substances, directly using the lye from the suppressor regeneration outlet as the regeneration liquid for the CRD, resulting in CO in the lye carryover eluent loop2Meanwhile, ammonia in the alkali liquor can reversely permeate the permeable membrane to enter the sample leacheate, when the leacheate carries a sample to enter the conductivity cell for analysis, the base line of the ion chromatography is raised, chloride ions and sulfate ions in the sample can be covered by the raised base line, and ion peaks cannot be detected or correct trace anion detection and analysis cannot be carried out.
In order to eliminate the influence of ammonia on the measurement, chemical laboratory personnel carefully analyze the root cause of the rise of the ion chromatographic spectrum of the ammonia-containing sample, and discuss a research improvement scheme. After a series of tests, newly prepared alkali liquor is determined to be added outside the ion chromatography body to serve as CRD regeneration liquid, an instrument eluent bottle is used as a regeneration liquid tank, argon is used for purging the alkali liquor in the bottle and providing power for the alkali liquor, and ammonia ions are guaranteed not to be reversely dissolved into an ion chromatography flow path.
Disclosure of Invention
An object of the utility model is to provide an ion chromatogram adopts external regeneration decarbonization device, when effectively getting rid of the carbonate interference in the water sample, gets rid of the influence of ammonia to ion chromatogram detection baseline, and the two return circuits of accurate measurement nuclear power station contain anion content such as trace sulfate radical in ammonia water sample or the water sample of the same type.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
an ion chromatography adopts an external regeneration carbon removal device, an outlet of a carrier gas pressure reducing valve is connected with a three-way connector, one path of the three-way connector is connected with an ultrapure water leaching liquid tank, the other path of the three-way connector is connected with an external regeneration alkali liquid storage tank through a carrier gas pipeline, and a regeneration liquid connecting pipe is inserted into the bottom of the external regeneration alkali liquid storage tank; the regenerated liquid connecting pipe is connected with the regenerated liquid flow-limiting pipe through the reducing joint; the regenerated liquid flow-limiting pipe is connected with a regenerated liquid connecting pipe through a reducing joint, and the regenerated liquid connecting pipe is connected with a regenerated liquid inlet of the carbonate removing device through the reducing joint; the regenerated liquid outlet of the carbonate removing device is connected with the regenerated waste liquid pipe through the reducer union.
And argon or other inert gases are introduced into an inlet of the carrier gas pressure reducing valve.
The pressure of the external regeneration alkali liquor storage tank is adjusted to 3-6 psi.
The regeneration liquid connecting pipe is a PEEK transparent pipeline.
The regenerated liquid connecting pipe is reserved at the bottle mouth of the external regenerated alkali liquid storage tank for 5cm of connector length.
The regeneration liquid flow limiting pipe is a black peek pipe, and the length of the regeneration liquid flow limiting pipe is 30 cm.
The utility model discloses the beneficial effect who gains does:
the utility model discloses can get rid of the interference of two return circuits morpholine-ammonia-hydrazine water chemistry system aquatic carbonates of three factory nuclear power stations of the nuclear operation of china and aquatic ammonia. The detection accuracy of trace chloride ions and sulfate ions in the water of the system is improved. The in vitro regeneration carbon removal device has simple flow, simple and convenient installation and simple operation.
Drawings
FIG. 1 is a schematic diagram of an ion chromatography apparatus employing in vitro regeneration for carbon removal;
in the figure: 1. a carbonate removal unit; 2. an external regeneration alkali liquor storage tank; 3. a carrier gas pressure reducing valve; 4. a carrier gas line; 5. regenerating the waste liquid pipe; 6. a regenerated liquid connecting pipe; 7. a regenerated liquid flow-limiting pipe; 8. a three-way connector; 9. a reducing joint.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the ion chromatography adopts the structure of the external regeneration carbon removal device as follows: the outlet of the carrier gas pressure reducing valve 3 of argon (or other inert gases) is connected through a gas pipeline, the outlet of the carrier gas pressure reducing valve 3 is connected with a three-way connector 8, one path of the three-way connector 8 is connected with an ultrapure water leaching liquid tank, the other path of the three-way connector 8 is connected with an external regeneration alkali liquid storage tank 2 through a gas pipeline 4, and the pressure is adjusted to 3-6 psi. Argon gas is enabled to simultaneously provide purging gas for the ultrapure water leaching liquid tank and the external regeneration alkali liquid storage tank 2 and establish stable pressure in the bottles, a regeneration liquid connecting pipe 6(PEEK transparent pipeline 1/8' OD) is inserted into the bottom of the external regeneration alkali liquid storage tank 2, and a 5cm connector length is reserved at the bottle mouth; the regenerated liquid connecting pipe 6 is connected with a regenerated liquid flow-limiting pipe 7 (0.01' ID black peek pipe, the length is about 30cm) through a reducing joint 9; the function of the added pipeline is to increase back pressure and control the flow rate of regenerated alkali liquor, and the specific length can be determined according to the laboratory conditions. The regenerated liquid flow-limiting pipe 7 is connected with a regenerated liquid connecting pipe 6(PEEK transparent pipeline 1/8' OD) through a reducing joint 9, and the regenerated liquid connecting pipe 6 is connected with a regenerated liquid inlet (REGENIN) of the CRD-200 type carbonate removing device 1 through the reducing joint 9; the regenerated liquid outlet (REGEAN OUT) of the CRD-200 type carbonate removing device 1 is connected with a regenerated waste liquid pipe 5 through a reducer union 9, and the circulating alkali liquid is led OUT to the waste liquid.
A leaching solution tank for storing 100mmol/L potassium hydroxide solution is additionally arranged outside an ion chromatographic analyzer to serve as a CRD (cyclic redundancy check) external regeneration solution tank, an argon pressure reducing valve is used for pressurizing an external regeneration alkali solution storage tank at 6psi, so that the regeneration alkali solution continuously flows, a flow limiting pipe is used for limiting the flow, the regeneration alkali solution is controlled to stably reversely flow through the CRD at the outer layer of a CRD osmosis membrane at the speed of 1mL/min, ammonia and carbonate ions in a sample flow path flowing through the inner layer of the CRD are taken away, and CO in a sample is removed2And ammonia.
Claims (6)
1. The utility model provides an ion chromatography adopts external regeneration decarbonization device which characterized in that: an outlet of the carrier gas pressure reducing valve is connected with a three-way connector, one path of the three-way connector is connected with an ultrapure water leaching liquid tank, the other path of the three-way connector is connected with an external regeneration alkali liquid storage tank through an overload gas pipeline, and a regeneration liquid connecting pipe is inserted into the bottom of the external regeneration alkali liquid storage tank; the regenerated liquid connecting pipe is connected with the regenerated liquid flow-limiting pipe through the reducing joint; the regenerated liquid flow-limiting pipe is connected with a regenerated liquid connecting pipe through a reducing joint, and the regenerated liquid connecting pipe is connected with a regenerated liquid inlet of the carbonate removing device through the reducing joint; the regenerated liquid outlet of the carbonate removing device is connected with the regenerated waste liquid pipe through the reducer union.
2. The ion chromatography of claim 1 employs an in vitro regenerative decarbonization device, characterized in that: and argon is introduced into an inlet of the carrier gas pressure reducing valve.
3. The ion chromatography of claim 1 employs an in vitro regenerative decarbonization device, characterized in that: the pressure of the external regeneration alkali liquor storage tank is adjusted to 3-6 psi.
4. The ion chromatography of claim 1 employs an in vitro regenerative decarbonization device, characterized in that: the regeneration liquid connecting pipe is a PEEK transparent pipeline.
5. The ion chromatography of claim 1 employs an in vitro regenerative decarbonization device, characterized in that: the regenerated liquid connecting pipe is reserved at the bottle mouth of the external regenerated alkali liquid storage tank for 5cm of connector length.
6. The ion chromatography of claim 1 employs an in vitro regenerative decarbonization device, characterized in that: the regeneration liquid flow limiting pipe is a black peek pipe, and the length of the regeneration liquid flow limiting pipe is 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822191556.XU CN209900770U (en) | 2018-12-25 | 2018-12-25 | Ion chromatography adopts external regeneration decarbonization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822191556.XU CN209900770U (en) | 2018-12-25 | 2018-12-25 | Ion chromatography adopts external regeneration decarbonization device |
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| Publication Number | Publication Date |
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| CN209900770U true CN209900770U (en) | 2020-01-07 |
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| CN201822191556.XU Active CN209900770U (en) | 2018-12-25 | 2018-12-25 | Ion chromatography adopts external regeneration decarbonization device |
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