Intelligent detection system for solar photo-thermal power generation organic heat carrier

Abstract

The utility model discloses a solar photo-thermal power generation organic heat carrier intelligent detection system, and relates to the technical field of organic heat carrier detection, and the system comprises a simulation test device which is used for realizing the cycle operation of an organic heat carrier and extracting an organic heat carrier sample; the gas-liquid separation and sampling device is used for carrying out gas-liquid separation on the organic heat carrier sample and respectively sampling a separated gas-phase product and a separated liquid-phase product; the first chromatographic instrument is used for detecting the components of the gas-phase product to obtain the components of the gas-phase product; the second chromatographic instrument is used for detecting the components of the liquid-phase product to obtain the components of the liquid-phase product; and the data processing device is used for calculating a performance index result of the organic heat carrier sample based on the components of the gas-phase product and the components of the liquid-phase product. According to the application, real-time monitoring of the deterioration condition of the organic heat carrier can be rapidly and accurately realized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of organic heat carrier detection, in particular to a solar photo-thermal power generation organic heat carrier intelligent detection system. BACKGROUND

[0002] The organic heat carrier is a collective term of organic substances used as heat transfer medium. The organic heat carrier includes all organic mediums used for indirect heat transfer purposes, such as heat transfer liquid, heat conducting oil, organic heat transfer medium and heat medium. According to the chemical composition, the organic heat carrier can be classified into synthetic organic heat carrier and mineral oil type organic heat carrier; according to the boiling range, the organic heat carrier can be classified into gas phase organic heat carrier and liquid phase organic heat carrier.

[0003] In the detection of the heat transfer medium of the solar photo-thermal power generation system, the performance evaluation method of the organic heat carrier has problems of long detection time, high cost, lagging result and unreal evaluation result, and cannot reflect the change and real state of the heat transfer medium in the system in time, thereby causing hidden dangers to the operation safety of the heat transfer system. CONTENT OF THE INVENTION

[0004] The application aims to provide a solar photo-thermal power generation organic heat carrier intelligent detection system which can realize real-time monitoring of the deterioration of the organic heat carrier quickly and accurately.

[0005] In order to achieve the above-mentioned purpose, the application provides the following solutions.

[0006] The application provides a solar photo-thermal power generation organic heat carrier intelligent detection system, which comprises:

[0007] A simulation test device is used for realizing the circulation of the organic heat carrier and sampling the organic heat carrier sample.

[0008] A gas-liquid separation and sampling device is connected with the simulation test device and is used for separating the organic heat carrier sample into gas phase product and liquid phase product and sampling the separated gas phase product and liquid phase product respectively.

[0009] A first chromatograph is connected with the gas-liquid separation and sampling device and is used for detecting the components of the gas phase product to obtain the components of the gas phase product.

[0010] A second chromatograph is connected with the gas-liquid separation and sampling device and is used for detecting the components of the liquid phase product to obtain the components of the liquid phase product.

[0011] The data processing device is connected with the first chromatograph and the second chromatograph, and is configured to calculate a performance index result of the heat transfer fluid sample based on the components of the gas phase product and the components of the liquid phase product; the performance index result includes: composition and content of gas phase decomposition product of the heat transfer fluid, composition and content of low-boiling substance, composition and content of high-boiling substance, deterioration rate, and long-period data statistical trend line.

[0012] Optionally, the gas-liquid separation and sampling device comprises:

[0013] The online sample gas-liquid separation storage tank is connected with the simulation test device, and is configured to separate the heat transfer fluid sample into the gas phase product and the liquid phase product.

[0014] The gas online sampling device is connected with the online sample gas-liquid separation storage tank, and is configured to sample the gas phase product.

[0015] The liquid online sampling device is connected with the online sample gas-liquid separation storage tank, and is configured to sample the liquid phase product.

[0016] Optionally, the solar thermal power generation heat transfer fluid intelligent detection system further comprises:

[0017] The first pressure control device is connected with the simulation test device, and is configured to extract the heat transfer fluid sample.

[0018] The cooling circulation device is connected with the online sample gas-liquid separation storage tank, and is configured to separate and cool the gas phase product and the liquid phase product.

[0019] The second pressure control device is connected with the gas-liquid separation and sampling device, and is configured to discharge the gas phase product.

[0020] The first signal starting unit is connected with the first chromatograph, the second chromatograph and the second pressure control device respectively, and is configured to send a starting signal to the first chromatograph, the second chromatograph and the second pressure control device when the temperature of the gas phase product and the liquid phase product is below a preset temperature.

[0021] The second signal starting unit is connected with the gas online sampling device and the liquid online sampling device respectively, and is configured to send a sampling signal to the gas online sampling device and the liquid online sampling device when the first chromatograph and the second chromatograph are started.

[0022] Optionally, the first chromatograph comprises: a ten-way valve, a first six-way valve, a second six-way valve, a TCD detector and a first FID detector.

[0023] The outlet of the ten-way valve is connected with the inlet of the first six-way valve and the inlet of the second six-way valve respectively, the outlet of the first six-way valve is connected with the TCD detector, and the outlet of the second six-way valve is connected with the first FID detector.

[0024] The TCD detector is used for detecting H2, O2, CO2, N2, CH4 and CO in the gas-phase product.

[0025] The first FID detector is used for detecting small-molecule aromatic hydrocarbons in the gas-phase product.

[0026] Optionally, the second chromatograph comprises: a non-polar column, a solid-state thermal modulator, a polar column and a second FID detector connected in sequence.

[0027] The non-polar column is used for separating the liquid-phase product according to the difference in boiling points of substances to obtain a boiling-point product.

[0028] The solid-state thermal modulator is used for condensing the boiling-point product, and the condensate is input into the polar column in the form of periodic pulses after being re-gasified.

[0029] The polar column is used for continuing to separate the re-gasified boiling-point product according to the difference in polarity of substances to obtain a polar product.

[0030] The second FID detector is used for determining the types of various aromatic hydrocarbons based on the boiling-point product and the polar product.

[0031] Optionally, the data processing device is further used for displaying the performance index result, and making a judgment on whether the performance index result is qualified or not and giving an over-limit alarm prompt by limiting an index value.

[0032] Optionally, the data processing device is further used for determining a deterioration product distribution according to the performance index result, automatically judging a deterioration cause of the organic heat carrier sample, and giving a treatment strategy; the deterioration cause includes over-temperature, oxidation, pollution and H2 content greater than a preset content.

[0033] According to the specific embodiments provided in the application, the following technical effects are disclosed:

[0034] The application provides a solar photo-thermal power generation organic heat carrier intelligent detection system, which realizes the circulation operation of the organic heat carrier through a simulation test device, and samples the organic heat carrier sample; the organic heat carrier sample is subjected to gas-liquid separation through a gas-liquid separation and sampling device, and the separated gas phase product and liquid phase product are sampled respectively; the components of the gas phase product are detected through a first chromatograph, and the components of the gas phase product are obtained; the components of the liquid phase product are detected through a second chromatograph, and the components of the liquid phase product are obtained; finally, the performance index results of the organic heat carrier sample are calculated based on the components of the gas phase product and the components of the liquid phase product through a data processing device; the performance index results include the composition and content of the organic heat carrier gas phase decomposition product, the composition and content of low-boiling substances, the composition and content of high-boiling substances, the deterioration rate and the long-period data statistical trend line. The simulation test device, the gas-liquid separation and sampling device, the first chromatograph, the second chromatograph and the data processing device are used in cooperation, so that the deterioration of the organic heat carrier can be monitored in real time, and then the product deterioration detailed information and disposal strategy can be given according to the performance index results, so as to guide the adjustment of system operation and regeneration system operation conditions. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 A structural block diagram of a solar photo-thermal power generation organic heat carrier intelligent detection system provided by an embodiment of the present application.

[0037] Figure 2 A structural schematic diagram of a first chromatograph provided by an embodiment of the present application.

[0038] Figure 3 A structural schematic diagram of a second chromatograph provided by an embodiment of the present application.

[0039] Reference signs:

[0040] 1-simulation test device; 2-gas-liquid separation and sampling device; 3-first chromatograph; 4-second chromatograph; 5-data processing device; V1-ten-way valve; V2-first six-way valve; V3-second six-way valve. DETAILED DESCRIPTION

[0041] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0042] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0043] In one exemplary embodiment, as shown in Figure 1 A solar thermal power generation organic heat carrier intelligent detection system is provided, which comprises:

[0044] An analog test device 1 is used to realize the cyclic operation of the organic heat carrier and sample the organic heat carrier sample.

[0045] A gas-liquid separation and sampling device 2 is connected with the analog test device 1 and used to separate the organic heat carrier sample into gas and liquid phases and sample the separated gas and liquid products respectively.

[0046] A first chromatograph 3 is connected with the gas-liquid separation and sampling device 2 and used to detect the components of the gas product to obtain the components of the gas product.

[0047] A second chromatograph 4 is connected with the gas-liquid separation and sampling device 2 and used to detect the components of the liquid product to obtain the components of the liquid product.

[0048] A data processing device 5 is connected with the first chromatograph 3 and the second chromatograph 4 and used to calculate the performance index results of the organic heat carrier sample based on the components of the gas product and the components of the liquid product; the performance index results include the composition and content of the organic heat carrier gas phase decomposition product, the composition and content of the low-boiling substance, the composition and content of the high-boiling substance, the deterioration rate and the long-period data statistical trend line.

[0049] Specifically, the analog test device 1 can perform field operation analog test, realize the cyclic operation of the organic heat carrier at a maximum temperature of 400℃, provide an online detection environment, and sample the sample through system pressure control.

[0050] As an optional implementation, the gas-liquid separation and sampling device 2 comprises:

[0051] An online sample gas-liquid separation tank 21 is connected with the simulation test device 1, and is used for gas-liquid separation of the organic heat carrier sample to obtain gas phase products and liquid phase products.

[0052] A gas online sampling device 22 is connected with the online sample gas-liquid separation tank 21, and is used for sampling the gas phase products.

[0053] A liquid online sampling device 23 is connected with the online sample gas-liquid separation tank 21, and is used for sampling the liquid phase products.

[0054] As an optional implementation, the solar thermal power generation organic heat carrier intelligent detection system further comprises:

[0055] A first pressure control device is connected with the simulation test device 1, and is used for production of the organic heat carrier sample.

[0056] A cooling circulation device is connected with the online sample gas-liquid separation tank 21, and is used for separation and cooling of the gas phase products and the liquid phase products.

[0057] A second pressure control device is connected with the gas-liquid separation and sampling device 2, and is used for discharge of the gas phase products.

[0058] A first signal starting unit is connected with the first chromatograph 3, the second chromatograph 4 and the second pressure control device respectively, and is used for sending starting signals to the first chromatograph 3, the second chromatograph 4 and the second pressure control device when the temperature of the gas phase products and the liquid phase products is below a preset temperature.

[0059] A second signal starting unit is connected with the gas online sampling device 22 and the liquid online sampling device 23 respectively, and is used for sending sampling signals to the gas online sampling device 22 and the liquid online sampling device 23 when the first chromatograph 3 and the second chromatograph 4 are started.

[0060] Specifically, the online sample gas-liquid separation tank 21 can realize gas-liquid separation of the online sample collected at a fixed time to obtain the gas phase products and the liquid phase products. The organic heat carrier running in the simulation test device 1 will change with time, which affects the performance and power generation efficiency. In order to timely monitor the change, the in-use organic heat carrier in the device needs to be collected at a fixed time. The collected organic heat carrier has a temperature close to 400 DEG C and is in a gas-liquid mixed state. Under the action of the cooling circulation device connected with the online sample gas-liquid separation tank 21, the gas phase products and the liquid phase products are separated and cooled.

[0061] When the temperature drops to below 200℃, the first signal starting unit sends a starting signal to the first chromatograph 3, the second chromatograph 4 and the second pressure control device, and when the first chromatograph 3 and the second chromatograph 4 are started, the second signal starting unit sends a sampling signal to the gas online sampling device 22 and the liquid online sampling device 23, which includes displacement, dilution, sampling, and sampling system cleaning. The second pressure control device allows the gaseous product to be output from the top of the online sample gas-liquid separation tank 21, and enters the first chromatograph 3 through the gas online sampling device 22. The liquid product is output from the middle of the tank body of the online sample gas-liquid separation tank 21, and enters the second chromatograph 4 through the liquid online sampling device 23. The bottom of the online sample gas-liquid separation tank 21 is provided with a liquid discharge outlet for displacement and discharge of excess organic heat carrier.

[0062] As an optional embodiment, as shown in Figure 2 The first chromatograph 3 includes a ten-way valve V1, a first six-way valve V2, a second six-way valve V3, a TCD detector and a first FID detector.

[0063] The outlet of the ten-way valve V1 is connected with the inlet of the first six-way valve V2 and the inlet of the second six-way valve V3 respectively, the outlet of the first six-way valve V2 is connected with the TCD detector, and the outlet of the second six-way valve V3 is connected with the first FID detector.

[0064] The TCD detector is used to detect H2, O2, CO2, N2, CH4 and CO in the gaseous product.

[0065] The first FID detector is used to detect small molecule aromatic hydrocarbons in the gaseous product.

[0066] It should be noted that the gaseous phase composition is relatively simple and can be analyzed by 1D GC. The tail gas is composed of H2, CO, O2, CO2, benzene, toluene, ethylbenzene, etc. A gas chromatograph equipped with a double channel is used for analysis (channel 1: HayeSep Q and molecular sieve column, used for detection of H2, etc.; channel 2: PLOT Al2O3 column, used for detection of hydrocarbons).

[0067] In this embodiment, the ten-way valve V1 is initially in a single-line state, and the event Relay1(1) is used to switch V1 to a double-line state, so that the gaseous product in the quantitative ring enters the analysis system. When H2, CO, O2, CO2 enter MC-1 (pre-treatment column 1 (HayeSep Q)), the event Relay1(0) is used to backflush the components after CO2 (i.e. to exclude water vapor and heavy components).

[0068] In channel 1, the first six-way valve V2 is initially in a single-line state, when H2 and O2 flow out of MC-2, and CO2 does not enter MC-2 (analysis column 1 (molecular sieve column)), V2 is switched to a double-line state by using event Relay2(1), and H2 and O2 are detected by TCD. Then CO2 is detected by TCD by passing through CC-2 (damping, which balances the pressure effect). Finally, V2 is switched to a single-line state by using event Relay2(0), and N2, CH4 and CO are detected by TCD after being separated by MC-2.

[0069] In channel 2, the second six-way valve V3 is initially in a single-line state, and V3 is switched to a double-line state by using event Relay3(1) to make the gas sample in the constant volume loop enter the analysis system. After the sample is separated by MC-3 (analysis column 2 (PLOT Al2O3 column)), small molecule aromatic hydrocarbons such as benzene and toluene are detected by FID, and the valve is restored to a single-line state by using event Relay3(0) after the sample is injected.

[0070] As an optional implementation, as shown in Figure 3 The second chromatograph 4 includes, in sequence, a non-polar column, a solid-state thermal modulator, a polar column and a second FID detector.

[0071] The non-polar column is configured to separate the liquid phase product according to the difference in boiling points of substances, to obtain a boiling point product.

[0072] The solid-state thermal modulator is configured to condense the boiling point product, and after re-gasification, input the boiling point product into the polar column in the form of periodic pulses.

[0073] The polar column is configured to continue separating the gasified boiling point product according to the difference in polarity of substances, to obtain a polar product.

[0074] The second FID detector is configured to determine the types of various aromatic hydrocarbons based on the boiling point product and the polar product.

[0075] It should be noted that the liquid phase composition is complex, including biphenyl, biphenyl ether, small molecule benzene series generated by cracking reaction of the two, and multi-benzene ring polymers generated by polymerization reaction of small molecules and free radicals generated by cracking, wherein each group is an isomer, and separation is very difficult, and mutual interference is serious.

[0076] In the present embodiment, the 2D GCxGC analysis technology is adopted, liquid phase products are first introduced into the first dimension non-polar column (DB1 column) through split / splitless (S / SL) sampling port, separated according to the boiling point difference of the substances, the produced distillate is condensed in the solid state modulator (SSM), and after re-gasification, it is input into the second dimension polar column (60m HeavyWax column) in the form of periodic pulses, and the separation is continued according to the polarity difference of the substances. The above process realizes the separation of liquid phase products in the boiling point and polarity two dimensions in an orthogonal manner, greatly reduces the interference between similar components, and realizes the accurate analysis of product composition.

[0077] As an optional implementation, the data processing device is further configured to display the performance index result, and make a judgment on whether the performance index result is qualified or not by limiting an index value and give an alarm prompt if the performance index result exceeds the limit.

[0078] As an optional implementation, the data processing device is further configured to determine a degradation product distribution according to the performance index result, automatically judge a degradation cause of the organic heat carrier sample, and give a treatment strategy; the degradation cause includes over-temperature, oxidation, pollution, and H2 content greater than a preset content.

[0079] Specifically, the detailed composition of the organic heat carrier sample and the corresponding chromatographic peak retention time and peak area are obtained through chromatographic analysis, and the above signals are converted and output as the sample performance index result by the data processing device 5; the performance index result includes the composition and content of the gas phase decomposition products of the in-use organic heat carrier, the composition and content of the low-boiling substances, the composition and content of the high-boiling substances, the deterioration rate, and the long-period data statistical trend line. The data processing device 5 displays the above data results, and can also make a judgment on whether the performance index result of the sample is qualified or not by limiting an index value and give an alarm prompt if the performance index result exceeds the limit. The degradation product distribution is given, the degradation cause (over-temperature, oxidation, pollution, etc.) of the organic heat carrier sample is automatically judged, and a treatment strategy is given. For example, if the product detailed composition result reflects that there are many types and contents of polycyclic polymers, it can be judged that the main cause of product degradation is over-temperature operation, and a strategy such as suggesting checking the operation of the temperature control system is given; if the product composition analysis result reflects that there are organic acid oxidants, it can be judged that the main cause of product degradation is oxidation, and a strategy such as suggesting checking the system joint leakage is given; if the product composition analysis result reflects that there are water or other unconventional substances, it can be judged that the main cause of product degradation is pollution, and a strategy such as suggesting checking whether the system oil supplementing, regeneration, etc. operation is abnormal is given; if the product composition analysis result reflects that the H2 content is high, it can be predicted that the product degradation will be intensified, and a strategy such as suggesting performing exhaust operation as soon as possible to reduce the H2 content to a reasonable level is given.

[0080] The application can replace manual sampling and traditional 1000h heated thermal stability evaluation, can monitor the deterioration of organic heat carrier in real time, give product deterioration detailed information and disposal strategy, guide system operation and regeneration system operation condition adjustment.

[0081] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0082] The principles and implementation modes of the present application are described by using specific examples in this paper, and the above embodiment description is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the present application should not be understood as a limitation.

Claims

1. A solar photo-thermal power generation organic heat carrier intelligent detection system, characterized in that, The solar thermal power generation organic heat carrier intelligent detection system comprises: An analog test device for realizing the circulation of the organic heat carrier and sampling the organic heat carrier sample; A gas-liquid separation and sampling device connected with the analog test device, for separating the organic heat carrier sample into gas and liquid phases, and sampling the gas and liquid phase products; A first chromatograph connected with the gas-liquid separation and sampling device, for detecting the components of the gas phase product to obtain the components of the gas phase product; A second chromatograph connected with the gas-liquid separation and sampling device, for detecting the components of the liquid phase product to obtain the components of the liquid phase product; A data processing device connected with the first and second chromatographs, for calculating the performance index of the organic heat carrier sample based on the components of the gas and liquid phase products; the performance index includes the composition and content of the organic heat carrier gas phase decomposition product, the composition and content of low-boiling substances, the composition and content of high-boiling substances, the deterioration rate, and the long-term data statistical trend line.

2. The solar photo-thermal power generation organic heat carrier intelligent detection system according to claim 1, characterized in that, The gas-liquid separation and sampling device comprises: An online sample gas-liquid separation storage tank connected with the analog test device, for separating the organic heat carrier sample into gas and liquid phases to obtain the gas and liquid phase products; A gas online sampling device connected with the online sample gas-liquid separation storage tank, for sampling the gas phase product; A liquid online sampling device connected with the online sample gas-liquid separation storage tank, for sampling the liquid phase product. 3.The solar photo-thermal power generation organic heat carrier intelligent detection system according to claim 2, characterized in that, The solar thermal power generation organic heat carrier intelligent detection system further comprises: A first pressure control device connected with the analog test device, for sampling the organic heat carrier sample; A cooling circulation device connected with the online sample gas-liquid separation storage tank, for separating and cooling the gas and liquid phase products; A second pressure control device connected with the gas-liquid separation and sampling device, for discharging the gas phase product; A first signal starting unit connected with the first and second chromatographs and the second pressure control device, for sending a starting signal to the first and second chromatographs and the second pressure control device when the temperature of the gas and liquid phase products falls below a preset temperature; A second signal starting unit connected with the gas and liquid online sampling devices, for sending a sampling signal to the gas and liquid online sampling devices when the first and second chromatographs are started.

4. The solar photo-thermal power generation organic heat carrier intelligent detection system according to claim 1, characterized in that, The first chromatograph comprises a ten-way valve, a first six-way valve, a second six-way valve, a TCD detector, and a first FID detector; The outlet of the ten-way valve is connected with the inlets of the first and second six-way valves, the outlet of the first six-way valve is connected with the TCD detector, and the outlet of the second six-way valve is connected with the first FID detector; The TCD detector is used for detecting H2, O2, CO2, N2, CH4, and CO in the gas phase product; The first FID detector is configured to detect small molecule aromatic hydrocarbons in the gas phase product. 5.The solar photo-thermal power generation organic heat carrier intelligent detection system according to claim 1, characterized in that, The second chromatograph comprises a non-polar column, a solid thermal modulator, a polar column and a second FID detector connected in sequence. The non-polar column is configured to separate the liquid phase product according to the boiling point difference of the substances to obtain a boiling point product. The solid thermal modulator is configured to condense the boiling point product, and input the re-gasified boiling point product into the polar column in the form of periodic pulses. The polar column is configured to continue separating the re-gasified boiling point product according to the polarity difference of the substances to obtain a polar product. The second FID detector is configured to determine the types of various aromatic hydrocarbons based on the boiling point product and the polar product. 6.The solar photo-thermal power generation organic heat carrier intelligent detection system according to claim 1, characterized in that, The data processing device is further configured to display the performance index result, and determine whether the performance index result is qualified or not by limiting the index value and give an over-limit alarm prompt. 7.The solar photo-thermal power generation organic heat carrier intelligent detection system according to claim 6, characterized in that, The data processing device is further configured to determine the degradation product distribution according to the performance index result, automatically determine the degradation cause of the organic heat carrier sample, and give a treatment strategy; the degradation cause includes over-temperature, oxidation, pollution and H2 content greater than a preset content.

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