CN217879137U - Power station water vapor degassing hydrogen conductivity measurement system - Google Patents
Power station water vapor degassing hydrogen conductivity measurement system Download PDFInfo
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- CN217879137U CN217879137U CN202221021258.6U CN202221021258U CN217879137U CN 217879137 U CN217879137 U CN 217879137U CN 202221021258 U CN202221021258 U CN 202221021258U CN 217879137 U CN217879137 U CN 217879137U
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Abstract
The utility model belongs to the field of power station water vapor monitoring, and relates to a power station water vapor degassing hydrogen conductivity measurement system, which comprises a water sample inlet, a water sample outlet, a cation removal device, a membrane exchange device, a conductivity sensor, a second peristaltic pump and an absorption liquid storage tank; the water sample inlet is communicated with the water sample outlet through the cation removing device, the membrane exchange device and the conductivity sensor; the absorption liquid storage tank is communicated with the membrane exchange device through a second peristaltic pump; the membrane exchange device is communicated with the absorption liquid storage tank. The utility model provides a power station steam degassing hydrogen conductivity measurement system with accurate measurement result and timely measurement process feedback.
Description
Technical Field
The utility model belongs to power station steam monitoring field relates to a power station steam degasification hydrogen conductivity measurement system.
Background
The water vapor quality standard of the thermal power plant is an important basis for chemical supervision and is an important means for ensuring the safe and economic operation of power generation equipment. With the continuous operation of high-parameter and large-capacity units and novel water treatment equipment of a thermal power plant, the water vapor quality standard (GB/T12145) of the thermal power plant puts higher requirements on the water vapor quality of the thermal power plant, and has detailed parameter requirements on specific conductivity, hydrogen conductivity, degassed hydrogen conductivity, pH and ammonia content in the thermal power water vapor.
Common means for degassing hydrogen conductivity include a boiling method and a membrane method. The boiling method has high temperature and high risk, and the accurate conductivity of the degassed hydrogen after compensation can be obtained only by correspondingly compensating the measurement result, which will certainly affect the actual value of the conductivity of the degassed hydrogen. For membrane processes, carbon dioxide in water vapor is relatively low and cannot be completely removed, which also affects the measure of the conductivity of the degassed hydrogen. Because the carbon dioxide content in the water vapor of the power station is extremely low, the carbon dioxide is difficult to be completely removed by a boiling method and a membrane method, the electrical conductivity of the degassed hydrogen is measured after cations of a water sample are removed by using a cation exchange resin column, and a plurality of problems exist in the measurement of the electrical conductivity of the hydrogen.
In conclusion, the existing measuring method for the conductivity of the degassed hydrogen has the problems of low degassing efficiency, incapability of effectively performing accuracy test, measurement interference of ion exchange resin, huge operation and maintenance workload and the like, so that the conductivity of the degassed hydrogen is difficult to measure accurately, and the safe operation of thermodynamic equipment is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem existing in the background technology, the utility model provides a power station water vapor degassing hydrogen conductivity measurement system with accurate measurement result and timely measurement process feedback.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a power station water vapor degassing hydrogen conductivity measurement system comprises a water sample inlet, a water sample outlet, a cation removal device, a membrane exchange device, a conductivity sensor, a second peristaltic pump and an absorption liquid storage tank; the water sample inlet is communicated with the water sample outlet through the cation removing device, the membrane exchange device and the conductivity sensor; the absorption liquid storage tank is communicated with the membrane exchange device through a second peristaltic pump; the membrane exchange device is communicated with the absorption liquid storage tank.
The membrane exchange device comprises a water side and an absorption liquid side; the water side is separated from the absorption liquid side by a membrane; the cation removing device is communicated with the conductivity sensor through the water side of the membrane exchange device; the absorption liquid storage tank is communicated with the absorption liquid side of the membrane exchange device through a second peristaltic pump; and the absorption liquid side of the membrane exchange device is communicated with the absorption liquid storage tank.
The power station water vapor degassing hydrogen conductivity measurement system further comprises a first peristaltic pump arranged between the water sample inlet and the cation removal device.
The cation removal device is a continuous electrically regenerating cation exchange device.
The utility model has the advantages that:
the utility model provides a power station steam degasification hydrogen conductivity measurement system, its advantage is as follows:
(1) The electrical regeneration technology replaces the conventional ion exchange technology to measure the conductivity of the degassed hydrogen, the response speed is high, the measurement interference is less, and the measurement accuracy and the intelligence are improved;
(2) The instrument has simple structure and small volume, greatly saves space, does not need to replace a regenerated resin column and is convenient to maintain.
(3) The measuring volume is small, the measuring instrument can be used as a portable instrument, and the conductivity of the degassed hydrogen can be measured off-line or on-line.
(4) The degassed hydrogen conductivity measurements can be compared to standard materials. The degassing hydrogen conductivity value can be compared with a standard substance to determine the degassing effect.
(5) Can be used at normal temperature and normal pressure. The degassing hydrogen conductivity measurement process does not need heating to boiling, the degassing efficiency can reach more than 98 percent, and the degassing hydrogen conductivity of the water sample can be accurately measured at normal temperature and normal pressure.
Drawings
FIG. 1 is a schematic structural diagram of a power station water vapor degassing hydrogen conductivity measurement system provided by the present invention;
wherein:
1-a first peristaltic pump; 2-a cation removal unit; 3-a membrane exchange device; 4-a conductivity sensor; 5-a second peristaltic pump; 6-absorption liquid storage tank.
Detailed Description
Referring to fig. 1, the utility model provides a power station water vapor degassing hydrogen conductivity measurement system, which comprises a water sample inlet, a water sample outlet, a first peristaltic pump 1, a cation removing device 2, a membrane exchange device 3, a conductivity sensor 4, a second peristaltic pump 5 and an absorption liquid storage tank 6; a water sample enters an inlet of a cation removal device 2 through a first peristaltic pump 1; the outlet of the cation removal device 2 is communicated with the water side inlet of the membrane exchange device 3, a water sample to be measured enters the inlet of the conductivity sensor 4 from the water side outlet after carbon dioxide in the water sample is removed in the membrane exchange device 3, and the water sample after the conductivity measurement is discharged after passing through the outlet of the conductivity sensor 4; the absorption liquid in the absorption liquid storage tank 6 enters an absorption liquid side inlet of the membrane exchange device 3 through the second peristaltic pump 5, and returns to the absorption liquid storage tank 6 through an absorption liquid side outlet of the membrane exchange device 3 after absorbing carbon dioxide in the water sample to be detected, and the process is carried out circularly; the membrane exchange device 3 is divided into a water side and an absorption liquid side by a membrane, the water side of the membrane exchange device 3 is provided with an inlet and an outlet, and the absorption liquid side of the membrane exchange device 3 is provided with an inlet and an outlet.
Wherein, the cation removing device 2 is a continuous electric regeneration cation exchange device, and the cation exchange resin bag in the continuous electric regeneration device is dynamically regenerated in real time by using electric regeneration. The membrane in the membrane exchange device 3 can exchange carbon dioxide, and carbon dioxide in the water sample is completely removed through the membrane exchange device. The conductivity sensor 4 measures the degassed hydrogen conductivity using a non-linear temperature compensation curve for acidic conditions.
The pH value of water vapor in the power station is generally more than 9.5, the pH value of a water sample after cation removal is less than 4.5, and more than 96 percent of total carbonate (salt) in the water is CO under the pH condition 2 The water sample after hydrogen conductivity measurement enters a membrane exchange device to remove CO in the water sample 2 And measuring the conductivity of the effluent, namely the conductivity of the degassed hydrogen of the water sample.
Claims (4)
1. The utility model provides a power station steam degasification hydrogen conductivity measurement system which characterized in that: the power station water vapor degassing hydrogen conductivity measurement system comprises a water sample inlet, a water sample outlet, a cation removal device (2), a membrane exchange device (3), a conductivity sensor (4), a second peristaltic pump (5) and an absorption liquid storage tank (6); the water sample inlet is communicated with the water sample outlet through the cation removing device (2), the membrane exchange device (3) and the conductivity sensor (4); the absorption liquid storage tank (6) is communicated with the membrane exchange device (3) through a second peristaltic pump (5); the membrane exchange device (3) is communicated with the absorption liquid storage tank (6).
2. The power station water vapor degassing hydrogen conductivity measurement system of claim 1, wherein: the membrane exchange device (3) comprises a water side and an absorption liquid side; the water side is separated from the absorption liquid side by a membrane; the cation removal device (2) is communicated with the conductivity sensor (4) through the water side of the membrane exchange device (3); the absorption liquid storage tank (6) is communicated with the absorption liquid side of the membrane exchange device (3) through a second peristaltic pump (5); the absorption liquid side of the membrane exchange device (3) is communicated with the absorption liquid storage tank (6).
3. The power station water vapor degassing hydrogen conductivity measurement system of claim 2, wherein: the power station water vapor degassing hydrogen conductivity measurement system further comprises a first peristaltic pump (1) arranged between the water sample inlet and the cation removal device (2).
4. The power station water vapor degassing hydrogen conductivity measurement system of claim 1 or 2 or 3, characterized in that: the cation removal device (2) is a continuous electrically regenerating cation exchange device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221021258.6U CN217879137U (en) | 2022-04-29 | 2022-04-29 | Power station water vapor degassing hydrogen conductivity measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221021258.6U CN217879137U (en) | 2022-04-29 | 2022-04-29 | Power station water vapor degassing hydrogen conductivity measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217879137U true CN217879137U (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202221021258.6U Active CN217879137U (en) | 2022-04-29 | 2022-04-29 | Power station water vapor degassing hydrogen conductivity measurement system |
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| Country | Link |
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| CN (1) | CN217879137U (en) |
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2022
- 2022-04-29 CN CN202221021258.6U patent/CN217879137U/en active Active
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