CN214011046U - A ageing state monitoring devices and hydrochloric acid storage tank for corrosive liquids storage tank - Google Patents
A ageing state monitoring devices and hydrochloric acid storage tank for corrosive liquids storage tank Download PDFInfo
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- CN214011046U CN214011046U CN202022610634.2U CN202022610634U CN214011046U CN 214011046 U CN214011046 U CN 214011046U CN 202022610634 U CN202022610634 U CN 202022610634U CN 214011046 U CN214011046 U CN 214011046U
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Abstract
The utility model discloses an aging state monitoring device for a corrosive liquid storage tank and a hydrochloric acid storage tank, which comprises an optical fiber chemical sensor, wherein the optical fiber chemical sensor is used for monitoring the concentration of an index element of a fiber reinforced composite layer of the corrosive liquid storage tank; the index elements refer to chemical elements which are specially used for corrosive liquid or a fiber reinforced composite layer; the system also comprises a laser, a modulator, a demodulator and a microprocessor; the microprocessor can calculate the concentration of the index element and judge whether the corrosive liquid storage tank is aged or not according to the comparison result of the concentration of the index element and the concentration threshold value. And the hydrochloric acid storage tank is provided with an aging state monitoring device for the corrosive liquid storage tank. The utility model provides a how general technical problem who is used for the ageing state monitoring of the corrosive liquids storage tank of different grade type, improved the managerial efficiency, accord with reality more to ageing state's monitoring.
Description
Technical Field
The utility model relates to an aging state monitoring technology field of corrosive liquids storage tank.
Background
Since hydrochloric acid is corrosive, steel and aluminum are easily corroded under acidic conditions, and therefore, when storing an acidic medium, a hydrochloric acid storage tank is generally made of a fiber-reinforced composite material (containing Ca). Although the fiber reinforced composite material has strong corrosion resistance and small accident risk, when the fiber reinforced composite material is used for more than a certain period of time, the top of a storage tank is cracked and damaged due to permeation and corrosion of hydrochloric acid, so that leakage accidents are frequent. Different batches of storage tank materials with different models produced by different manufacturers have different component contents and thicknesses, and aging state management is difficult to perform by using a uniform principle. Moreover, the aging process of the storage tank can be influenced by the change of the environmental temperature, the influence of external force and the selection of the material of the surface coating. The corrosion and aging of the storage tank are carried out from inside to outside, the development speed is slow, and the detection work is difficult to carry out on the premise of not damaging the storage tank. Therefore, the service life of the fiber reinforced composite hydrochloric acid storage tank in actual environment cannot be evaluated at present.
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned technique, the utility model provides an aging condition monitoring devices for corrosive liquids storage tank solves the technical problem of how general the aging condition monitoring that is used for the corrosive liquids storage tank of different grade type.
In order to solve the above technical problem, the utility model provides a pair of technical scheme as follows: the aging state monitoring device for the corrosive liquid storage tank comprises an optical fiber chemical sensor, wherein the optical fiber chemical sensor is used for monitoring the concentration of an index element of a fiber reinforced composite layer of the corrosive liquid storage tank; the index elements refer to chemical elements which are specially used for corrosive liquid or a fiber reinforced composite layer;
the system also comprises a laser, a modulator, a demodulator and a microprocessor; laser generated by the laser is modulated into modulated light suitable for detecting index elements by the modulator, and the modulated light is sent into the optical fiber chemical sensor through a light path; the signal light returned by the optical fiber chemical sensor through the light path is converted into an electric signal through the demodulator and is sent to the microprocessor; the microprocessor can calculate the concentration of the corresponding index element according to the electric signal, and can judge whether the corrosive liquid storage tank is aged or not according to the comparison result of the concentration of the index element and the concentration threshold value.
A hydrochloric acid storage tank comprises a tank body, the inner wall of which is a fiber reinforced composite layer, wherein the tank body is provided with the aging state monitoring device for a corrosive liquid storage tank; the optical fiber chemical sensor extends into the fiber reinforced composite layer from the outside through the blind hole.
Furthermore, the distance from the inner wall surface of the tank body to the extending end of the optical fiber chemical sensor is 0.1-0.3 mm.
Further, the index element is a Cl element, and the wavelength of the modulated light is 465-465 nm; the concentration threshold is 0.1; and judging that the corrosive liquid storage tank is aged when the concentration of the Cl element in the fiber reinforced composite layer is higher than 0.1.
Further, the index element is Ca element, and the wavelength of the modulated light is 417.7-427.7 nm; the concentration threshold value is 0.03; and when the concentration of the Ca element in the fiber reinforced composite layer is lower than 0.03, judging that the corrosive liquid storage tank is aged.
Further, the optical fiber chemical sensor is arranged at the top of the tank body.
Compared with the prior art, the utility model has the advantages of include:
1. in the prior art, different principles are required to be used for managing the aging states of different types of storage tanks, so that the management is inconvenient, the management efficiency is low, and the aging states are often larger than actual aging states. The utility model discloses according to the characteristics of osmotic corrosion, utilize index element's concentration to carry out objective, scientific management, owing to regard as ageing judgement standard with objective index, consequently can be suitable for to various types of storage tank homoenergetic, improved the managerial efficiency, accord with reality more to the monitoring of ageing state.
2. The optical fiber chemical sensor extends into the fiber reinforced composite layer from the outside through the blind hole, so that the direct pouring of hydrochloric acid into the hole due to the adoption of through hole installation is avoided. The distance from the inner wall surface of the tank body to the stretching end of the optical fiber chemical sensor is 0.1-0.3 mm, and the optical fiber chemical sensor is prevented from being close to the tank body, so that the osmotic corrosion can be sensed as early as possible, and the safety is improved.
3. The utility model discloses the ageing state monitoring to the hydrochloric acid storage tank provides multiple scheme, and the practicality is strong, wherein adopts two index element (Cl and Ca) can further improve the accuracy.
Drawings
Fig. 1 is a schematic structural view of a hydrochloric acid storage tank in this embodiment.
Detailed Description
Referring to fig. 1, a hydrochloric acid storage tank comprises a tank body 1 with an inner wall of a fiber reinforced composite layer, wherein a liquid inlet 101 is arranged at the top of the tank body, and a liquid outlet 102 is arranged at the lower end of the tank body; the tank body 1 is provided with an aging state monitoring device for a corrosive liquid storage tank.
The aging state monitoring device comprises an optical fiber chemical sensor 2, wherein the optical fiber chemical sensor 2 extends into the fiber reinforced composite layer from the outside through a blind hole, and the optical fiber chemical sensor 2 is used for monitoring the concentration of an index element of the fiber reinforced composite layer of the corrosive liquid storage tank; the index elements refer to chemical elements which are specially used for corrosive liquid or a fiber reinforced composite layer.
Since the top of the tank 1 is greatly affected by the use environment, and the high temperature and high concentration of HCl gas in the top accelerate the osmotic corrosion behavior of hydrochloric acid, and thus aging is more likely to occur, it is preferable to mount the photo-chemical sensor 2 on the top of the tank.
The aging state monitoring device also comprises a laser, a modulator, a demodulator and a microprocessor; laser generated by the laser is modulated into modulated light suitable for detecting index elements by the modulator, and the modulated light is sent into the optical fiber chemical sensor 2 through a light path (incident optical fiber); the signal light returned by the optical fiber chemical sensor 2 through the optical path (reflection optical fiber) is converted into an electric signal through a demodulator and is sent to a microprocessor; the microprocessor can calculate the concentration of the corresponding index element according to the electric signal, and can judge whether the corrosive liquid storage tank is aged or not according to the comparison result of the concentration of the index element and the concentration threshold value.
The main function of the fiber-optic chemical sensor 2 is to detect the concentration of the element, and how the microprocessor calculates the concentration of the index element is also in the prior art, for example, "for measuring the concentration of the liquid by infrared fiber-optic sensing technique", german, sensor world, 2004(010)010, which will not be described herein again.
The microprocessor can send the aging state judgment result to the display screen for displaying; the microprocessor can send an alarm signal to an alarm device when judging that the aging occurs, wherein the alarm device is an acoustic/optical alarm device or a display screen. The aging state digital indicator 3 is assembled by the laser, the modulator, the demodulator, the microprocessor and the display screen, and then is installed on the outer wall of the tank body 1, and an anti-corrosion cover 4 is covered on the outer cover of the aging life digital indicator for protection. Meanwhile, the part of the optical fiber chemical sensor 2 exposed out of the tank body 1 is also protected by the anticorrosion cover 4.
The laser is used for generating an initial stable laser light source, and the model of the laser is DL pro; the modulator is used for modulating the laser light source to meet the requirement of index element light, and the type of the modulator is NIR-MPX; a demodulator for converting the signal light returned by the optical fiber chemical sensor 2 into an electric signal for processing, wherein the model is DT-907; LPC2136 is selected as the number of the microprocessor; and the liquid crystal display screen is used for displaying the aging life detection result and the alarm information, and the model is G050TAN01.0.
For the hydrochloric acid storage tank, the index element can be preferably Cl element or Ca element, the absorption wavelength of the Cl element is 470nm, and the wavelength of incident modulation light for detecting the Cl element is 465-475 nm; the absorption wavelength of Ca element is 422.7nm, and the incident modulation wavelength is 417.7-427.7nm when detecting Ca element. The following three schemes are provided separately:
1) when the index element is a Cl element, the wavelength of the modulated light is 465-465 nm; the concentration threshold is 0.1; and judging that the corrosive liquid storage tank is aged when the concentration of the Cl element in the fiber reinforced composite layer is higher than 0.1. The concentration detection result is dimensionless quantity after normalization, has no unit, and is convenient for only comparing the detection result with the value of the threshold value when the result is researched and judged.
2) When the index element is Ca element, the wavelength of the modulated light is 417.7-427.7 nm; the concentration threshold value is 0.03; and when the concentration of the Ca element in the fiber reinforced composite layer is lower than 0.03, judging that the corrosive liquid storage tank is aged.
3) When the index elements are Cl element and Ca element; and judging that the corrosive liquid storage tank is aged when the concentration of the Cl element is higher than 0.1 and the concentration of the Ca element is lower than 0.03.
Two index elements respectively need two modulated lights with different wavelengths, the modulator modulates initial light generated by the laser to obtain light with a specified wavelength, and the same demodulator can demodulate reflected light in a specified wavelength range through setting, so that a set of sensor, modulator and demodulator is needed. When measuring Cl element, modulating incident wavelength into light with wavelength of 465-465 nm by a modulator, and calculating the concentration of the Cl element by photoelectric demodulation and conversion according to the absorption intensity of 470nm wavelength light in reflected light; similarly, when measuring Ca element, the incident light with wavelength of 417.7-427.7nm is modulated by the modulator, and the concentration of Cl element is calculated by photoelectric demodulation and conversion according to the absorption intensity of 422.7nm wavelength light in the reflected light.
The utility model discloses according to the characteristics of osmotic corrosion, utilize index element's concentration to carry out objective, scientific management, owing to regard as ageing judgement standard with objective index, consequently can be suitable for to various types of storage tank homoenergetic, improved the managerial efficiency, accord with reality more to the monitoring of ageing state.
Claims (10)
1. A ageing state monitoring devices for corrosive liquids storage tank, its characterized in that: the system comprises an optical fiber chemical sensor, a corrosion liquid storage tank and a control system, wherein the optical fiber chemical sensor is used for monitoring the concentration of an index element of a fiber reinforced composite layer of the corrosion liquid storage tank; the index elements refer to chemical elements which are specially used for corrosive liquid or a fiber reinforced composite layer;
the system also comprises a laser, a modulator, a demodulator and a microprocessor; laser generated by the laser is modulated into modulated light suitable for detecting index elements by the modulator, and the modulated light is sent into the optical fiber chemical sensor through a light path; the signal light returned by the optical fiber chemical sensor through the light path is converted into an electric signal through the demodulator and is sent to the microprocessor; the microprocessor can calculate the concentration of the corresponding index element according to the electric signal, and can judge whether the corrosive liquid storage tank is aged or not according to the comparison result of the concentration of the index element and the concentration threshold value.
2. The aging status monitoring device for corrosive liquid storage tanks, according to claim 1, wherein: the microprocessor can send the aging state judgment result to the display screen for displaying.
3. The aging status monitoring device for corrosive liquid storage tanks, according to claim 1, wherein: the microprocessor can send an alarm signal to an alarm device when judging that the aging occurs, wherein the alarm device is an acoustic/optical alarm device or a display screen.
4. A hydrochloric acid storage tank is characterized in that: the aging state monitoring device for the corrosive liquid storage tank comprises a tank body, wherein the inner wall of the tank body is a fiber reinforced composite layer, and the aging state monitoring device for the corrosive liquid storage tank is arranged on the tank body according to claim 1; the optical fiber chemical sensor extends into the fiber reinforced composite layer from the outside through the blind hole.
5. The hydrochloric acid storage tank of claim 4, characterized in that: the distance from the inner wall surface of the tank body to the stretching end of the optical fiber chemical sensor is 0.1-0.3 mm.
6. The hydrochloric acid storage tank of claim 4, characterized in that: the index element is a Cl element, and the wavelength of the modulated light is 465-465 nm; the concentration threshold is 0.1; and judging that the corrosive liquid storage tank is aged when the concentration of the Cl element in the fiber reinforced composite layer is higher than 0.1.
7. The hydrochloric acid storage tank of claim 4, characterized in that: the index element is Ca element, and the wavelength of the modulated light is 417.7-427.7 nm; the concentration threshold value is 0.03; and when the concentration of the Ca element in the fiber reinforced composite layer is lower than 0.03, judging that the corrosive liquid storage tank is aged.
8. The hydrochloric acid storage tank of claim 4, characterized in that: the index elements are Cl elements and Ca elements; and judging that the corrosive liquid storage tank is aged when the concentration of the Cl element is higher than 0.1 and the concentration of the Ca element is lower than 0.03.
9. The hydrochloric acid storage tank of claim 4, characterized in that: the optical fiber chemical sensor is arranged at the top of the tank body.
10. The hydrochloric acid storage tank of claim 4, characterized in that: the part of the optical fiber chemical sensor exposed out of the tank body is protected by an anti-corrosion cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022610634.2U CN214011046U (en) | 2020-11-12 | 2020-11-12 | A ageing state monitoring devices and hydrochloric acid storage tank for corrosive liquids storage tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022610634.2U CN214011046U (en) | 2020-11-12 | 2020-11-12 | A ageing state monitoring devices and hydrochloric acid storage tank for corrosive liquids storage tank |
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| CN214011046U true CN214011046U (en) | 2021-08-20 |
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| CN202022610634.2U Active CN214011046U (en) | 2020-11-12 | 2020-11-12 | A ageing state monitoring devices and hydrochloric acid storage tank for corrosive liquids storage tank |
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