CN206114581U - A composite electrode for on-line monitoring of industrial wastewater pH - Google Patents

Abstract

The utility model discloses an industrial waste water on-line monitoring pH combined electrode, it includes a casing, sets up at the insulating rubber seal at casing top, sets up electrode lead-out wire on insulating seal, sets up at the inside Ag AgCl measuring electrode and the Ag AgCl reference electrode of casing, encapsulates at the inside packing resin of casing, fills at the inside colloid reference liquid of casing and sets up the high density ceramic circle in the casing bottom. The utility model discloses a composite electrode chooses colloid reference liquid for use to replace traditional liquid reference liquid, and the shelf life is longer, is difficult for running off to adopt the packaging structure of improvement, compare with current electrode, the electric potential is more stable when having the measurement, the reproducibility is better, measured data is more stable, manufacturing and maintenance cost are lower, life advantage such as longer, can satisfy the requirement of field pH value continuous determination such as municipal sewage treatment, industrial waste water treatment, aquaculture and environmental monitoring, and the range of application is wide.

Description

A composite electrode for on-line monitoring of industrial wastewater pH

technical field

The utility model relates to an on-line pH monitoring composite electrode for industrial waste water, which belongs to the field of monitoring equipment.

Background technique

Electrodes used in pH measurement are also called primary cells. The electrode that combines the pH glass electrode and the reference electrode is the pH composite electrode. According to the different shell materials, it can be divided into plastic shell and glass. Compared with two electrodes, the biggest advantage of a composite electrode is its ease of use. The pH compound electrode is mainly composed of electrode bulb, glass support rod, internal reference electrode, internal reference solution, shell, external reference electrode, external reference solution, liquid junction, electrode cap, electrode wire, socket and so on. The pH compound electrode is suitable for the continuous measurement of pH in the fields of urban sewage treatment, industrial wastewater treatment, aquaculture and environmental monitoring.

The reference electrode in the pH composite electrode is the reference electrode for measuring the potential difference. The common ones are hydrogen electrode, calomel electrode and Ag/AgCl reference electrode. The conditions for the realization of the hydrogen electrode are relatively harsh and are rarely used in experiments; the calomel electrode is dangerous to use because it contains the toxic substance mercury; the Ag/AgCl reference electrode is low in cost, safe in use, and easy to prepare. The most common reference electrode. The traditional Ag/AgCl reference electrode is mainly used in the aqueous solution system, and the internal reference solution needs to be replaced frequently, which is very inconvenient to use.

The utility model discloses a composite electrode for on-line monitoring of industrial wastewater pH, which comprises a shell, an insulating rubber sealing ring, a filling resin, an Ag/AgCl measuring electrode, a colloidal reference solution, an Ag/AgCl reference electrode, a glass fiber fixing sheet and a high Density ceramic ring, etc. The colloidal reference solution is used to replace the traditional liquid reference solution, which has a longer shelf life and is not easy to lose, and adopts an improved packaging structure. Compared with the existing electrode, it has more stable potential during measurement, better reproducibility, and more stable measurement data. , lower manufacturing and maintenance costs, longer service life, etc., can meet the requirements of continuous measurement of pH value in the fields of urban sewage treatment, industrial wastewater treatment, aquaculture and environmental monitoring, etc., and has a wide range of applications.

Utility model content

The purpose of the utility model is to provide a composite electrode for on-line pH monitoring of industrial wastewater.

The technical scheme that the utility model takes is:

An industrial wastewater on-line monitoring pH composite electrode, comprising a housing, the top of the housing is provided with an insulating rubber seal ring, the insulating seal ring is provided with electrode lead wires, and the inside of the housing is provided with parallel and The Ag/AgCl measuring electrode and the Ag/AgCl reference electrode respectively connected to the electrode lead-out wire, the Ag/AgCl measuring electrode is arranged in the measuring electrode glass casing, and the measuring electrode glass casing is filled with phosphate/potassium chloride filling liquid, the Ag/AgCl reference electrode is arranged in the reference electrode glass casing, the tops of the measuring electrode glass casing and the reference electrode glass casing are fixed on the glass fiber fixing sheet, and the glass fiber fixing sheet Filling resin is packaged between the insulating sealing ring, colloidal reference liquid is filled inside the housing, and a high-density ceramic ring is arranged at the bottom of the housing.

Further, the glass fiber fixing sheet is provided with a first measurement electrode glass sleeve fixing hole, a reference electrode glass sleeve fixing hole and a reference solution injection hole.

Further, the lower end surface of the glass sleeve of the reference electrode has a porous structure.

Further, the measuring electrode glass sleeve passes through the fixing hole of the second measuring electrode glass sleeve on the high-density ceramic ring, and is fixed in the hole.

Further, an insulating rubber gasket is arranged between the high-density ceramic ring and the measuring electrode glass sleeve.

The beneficial effects of the utility model are: the utility model uses a colloidal reference liquid to replace the traditional liquid reference liquid in the industrial wastewater on-line monitoring pH composite electrode, has a longer shelf life, is not easy to be lost, and adopts an improved packaging structure, which is comparable to the existing electrodes. It has the advantages of more stable potential during measurement, better reproducibility, more stable measurement data, lower manufacturing and maintenance costs, and longer service life. It can meet the needs of urban sewage treatment, industrial wastewater treatment, aquaculture and environmental monitoring, etc. The requirements for continuous determination of pH value in the field have a wide range of applications.

Description of drawings

Fig. 1 is a structural schematic diagram of the pH composite electrode of the present invention.

Fig. 2 is a schematic plan view of the glass fiber fixing sheet in Fig. 1 .

FIG. 3 is a schematic plan view of the high-density ceramic ring in FIG. 1 .

Description of attached drawings: 1. Housing; 2. Insulating rubber sealing ring; 3. Electrode lead-out wire; 4. Glass fiber fixing piece; 41. Fixing hole of measuring electrode glass sleeve; 42. Fixing hole of reference electrode glass sleeve ;43. Reference solution injection hole; 5. Ag/AgCl measuring electrode; 6. Ag/AgCl reference electrode; 7. Filling resin; 8. Colloidal reference solution; 9. Measuring electrode glass sleeve; 10. Phosphate / Potassium chloride filling solution; 11. Reference electrode glass sleeve; 12. High-density ceramic ring; 121. Fixing hole of measuring electrode glass sleeve; 122. Insulating rubber gasket.

detailed description

Below in conjunction with specific embodiment and accompanying drawing, the utility model is further explained and illustrated.

It can be seen from Figures 1 to 3 that an industrial wastewater online monitoring pH composite electrode includes a housing 1, an insulating rubber sealing ring 2 is arranged on the top of the housing 1, and electrode lead wires are arranged on the insulating sealing ring 2 3. The housing 1 is provided with an Ag/AgCl measuring electrode 5 and an Ag/AgCl reference electrode 6 arranged in parallel and respectively connected to the electrode lead-out wire 3, and the Ag/AgCl measuring electrode 5 is arranged on the measuring electrode glass sleeve In the tube 9, the measuring electrode glass casing 9 is filled with a phosphate/potassium chloride filling solution 10, the Ag/AgCl reference electrode 6 is arranged in the reference electrode glass casing 11, and the measuring electrode glass The top ends of the casing 9 and the reference electrode glass casing 11 are fixed on the glass fiber fixing sheet 4, and a filling resin 7 is encapsulated between the glass fiber fixing sheet 4 and the insulating sealing ring 2, and the inside of the housing 1 is filled with There is a colloidal reference solution 8, and a high-density ceramic ring 12 is arranged at the bottom of the housing 1 .

Preferably, the glass fiber fixing sheet 4 is provided with a measurement electrode glass sleeve fixing hole 41 , a reference electrode glass sleeve fixing hole 42 and a reference solution injection hole 43 .

Preferably, the lower end surface of the reference electrode glass sleeve 11 has a porous structure.

Preferably, the lower end surface of the measuring electrode glass sleeve 9 is spherical, and the spherical part is outside the casing 1 .

Preferably, the measuring electrode glass sleeve 9 passes through the measuring electrode glass sleeve fixing hole 121 in the middle of the high-density ceramic ring 12 and is fixed in the hole.

Preferably, an insulating rubber gasket 122 is provided directly between the high-density ceramic ring 12 and the measuring electrode glass sleeve 9 .

Preferably, the colloidal reference solution 8 is prepared by mixing gelatin, KCl and water according to a material ratio of 2.5g:15g:100mL.

Preferably, the filling resin 7 is epoxy resin AB glue.

When in use, the pH composite electrode for on-line industrial wastewater monitoring of the utility model is calibrated first with a buffer solution of known pH value, and then the pH value test is performed. After use, the electrode is regularly cleaned with distilled water to prevent electrode passivation and sensitivity drop.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the above-mentioned embodiment, and any other changes, modifications and substitutions made without departing from the spirit and principle of the present utility model , combination, and simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (5)

1. An industrial wastewater on-line monitoring pH composite electrode, comprising a housing, is characterized in that: the top of the housing is provided with an insulating rubber sealing ring, and the insulating sealing ring is provided with electrode lead wires, and the housing There are Ag/AgCl measuring electrodes and Ag/AgCl reference electrodes arranged in parallel and respectively connected to the electrode lead wires inside. The Ag/AgCl measuring electrodes are arranged in the measuring electrode glass casing, and the measuring electrode glass casing is filled with Phosphate/potassium chloride filling liquid, the Ag/AgCl reference electrode is arranged in the reference electrode glass casing, the tops of the measuring electrode glass casing and the reference electrode glass casing are fixed on the glass fiber fixed sheet, Filling resin is packaged between the glass fiber fixing sheet and the insulating sealing ring, colloidal reference liquid is filled inside the housing, and a high-density ceramic ring is arranged at the bottom of the housing. 2. The pH composite electrode according to claim 1, characterized in that: the glass fiber fixing sheet is provided with a first measuring electrode glass sleeve fixing hole, a reference electrode glass sleeve fixing hole and a reference solution injection hole. 3. The pH composite electrode according to claim 1, characterized in that: the lower end surface of the glass sleeve of the reference electrode has a porous structure. 4. The pH composite electrode according to claim 1, characterized in that: the measuring electrode glass sleeve passes through the fixing hole of the second measuring electrode glass sleeve on the high-density ceramic ring, and is fixed in the hole. 5. The pH composite electrode according to claim 1, characterized in that: an insulating rubber gasket is arranged between the high-density ceramic ring and the measuring electrode glass sleeve.