Online chromatographic analysis system for phenol liquid

Abstract

The utility model provides a phenol liquid on-line chromatographic analysis system, the on-line chromatographic analysis system is connected with a phenol pipeline, the phenol pipeline is provided with at least one sample sampling point and at least one sample return point, the main body of the on-line chromatographic analysis system is a heat preservation box, and the heat preservation box is connected with the phenol pipeline. An anti-explosion heater, an on-line chromatographic analyzer and a sample pipeline are arranged in the heat preservation box, the sample sampling point is connected with the on-line chromatographic analyzer through the sample pipeline, the sample return point is connected with the sample sampling point through the sample pipeline, a coil heating belt is wound on the outer side of the sample pipeline, and the coil heating belt is connected with the sample return point through the sample pipeline. The coil pipe heating belt is heated by the anti-explosion heater, and the temperature of a pipeline in the box is kept at 60 DEG C by using the coil pipe heating structure and the anti-explosion heater, so that phenol obtained by sampling is always in a liquid state, and an on-line chromatographic analyzer can conveniently and directly analyze a sample.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chromatographic analysis, especially to a phenol liquid on -line chromatographic analysis system. BACKGROUND

[0002] Phenol is an organic compound, chemical formula is C6H5OH, is colorless needle-like crystal with special smell, is poisonous, is important raw material of producing some resins, bactericides, preservatives and medicines (such as aspirin). O-cresol, full name is o-cresol, chemical formula: C7H8O, o-cresol is colorless or slightly reddish crystal, has phenol smell, is poisonous, has corrosive. Melting point 30.9 ℃, boiling point 190.8 ℃, relative density 1.0273, refractive index 1.5361, flash point 81.1 (closed cup), self -ignition point 598.9. It belongs to organic corrosive article, dissolves about 40 times water (water solubility 40 ℃ reaches 3%, 100 ℃ reaches 5.3%).

[0003] In part application scene, the content of o-cresol in phenol needs to be determined, generally uses gas chromatography, gas chromatograph is the instrument that utilizes chromatographic separation technique and detection technique, carries out qualitative and quantitative analysis to the complex mixture liquid or gas of multiple components, solid cannot directly carry out chromatographic analysis, and phenol is solid, cannot directly use gas chromatography to analyze, to realize liquid sampling chromatographic analysis, the sample needs to be pretreated and heated, and then chromatographic analysis is carried out in liquid state. UTILITY MODEL CONTENT

[0004] In view of the lack of phenol liquid on-line analysis equipment at present, the utility model patent provides a phenol liquid on-line chromatographic analysis system, which realizes keeping the temperature in the box and pipeline above 60°C by using coil heating structure and explosion-proof heater, so that the phenol obtained by sampling is always in liquid state, facilitating direct analysis of the sample by the on-line chromatographic analyzer.

[0005] To achieve the above purpose, the embodiments of the utility model adopt the following technical solutions:

[0006] A phenol liquid on-line chromatographic analysis system, the on-line chromatographic analysis system is connected with a phenol pipeline, at least one sample sampling point and at least one sample return point are arranged on the phenol pipeline, the main body of the on-line chromatographic analysis system is a heat preservation box, an explosion-proof heater, an on-line chromatographic analyzer and a sample pipeline are arranged in the heat preservation box, the sample sampling point is connected with the on-line chromatographic analyzer through the sample pipeline, the sample return point is connected with the sample sampling point through the sample pipeline, a coil heating belt is wound outside the sample pipeline, and the coil heating belt is heated by the explosion-proof heater.

[0007] According to one aspect of the utility model, still be equipped with bypass filter on the sample pipeline, be equipped with sample flow meter on the sample pipeline between bypass filter and online chromatographic analysis appearance.

[0008] According to one aspect of the utility model, still be equipped with flow alarm device on the sample flow meter.

[0009] According to one aspect of the utility model, be equipped with first electric heat tracing line and sample valve on the sample pipeline between bypass filter and sample sampling point.

[0010] According to one aspect of the utility model, still be equipped with sampling valve on the sample pipeline between first electric heat tracing line and bypass filter.

[0011] According to one aspect of the utility model, be equipped with second electric heat tracing line and return valve on the sample pipeline between bypass filter and sample return point.

[0012] According to one aspect of the utility model, still be equipped with bypass flow meter on the sample pipeline between second electric heat tracing line and bypass filter.

[0013] According to one aspect of the utility model, the online chromatographic analysis system still includes waste liquid collecting device, and the waste liquid collecting device is connected with the online chromatographic analysis appearance through waste liquid collecting pipeline, sample pipeline.

[0014] According to one aspect of the utility model, the online chromatographic analysis appearance still is connected with online zero gas generator, online hydrogen gas generator.

[0015] According to one aspect of the utility model, the online zero gas generator still is connected with instrument valve.

[0016] The utility model discloses a kind of phenol liquid online chromatographic analysis systems, the online chromatographic analysis system is connected with phenol pipeline, at least one sample sampling point and at least one sample return point are equipped on the phenol pipeline, the main body of the online chromatographic analysis system is heat preservation box, explosion-proof heater, online chromatographic analysis appearance and sample pipeline are equipped in the heat preservation box, the sample sampling point is connected with the online chromatographic analysis appearance by sample pipeline, the sample return point is connected with the sample sampling point by sample pipeline, the outside of the sample pipeline is wound with coil heating band, the coil heating band is heated by the explosion-proof heater, by using coil heating structure and explosion-proof heater, keep the temperature in box, pipeline at 60 °C, make the phenol obtained by sampling be in liquid state, it is convenient for online chromatographic analysis appearance to directly analyze sample. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 The figure is a structural schematic diagram of the online chromatographic analysis system of the present application.

[0019] The names corresponding to the numbers in the figure are as follows:

[0020] 1, sample return point; 11, second electric heat tracing pipeline; 12, return valve; 2, sample sampling point; 21, first electric heat tracing pipeline; 22, sample inlet valve; 3, heat preservation box; 31, explosion-proof heater; 32, sampling valve; 33, bypass filter; 34, sample pipeline; 341, coil heating belt; 35, sample inlet flow meter; 351, flow alarm device; 36, bypass flow meter; 4, online chromatographic analyzer; 41, online zero gas generator; 42, online hydrogen gas generator; 43, instrument valve; 5, waste liquid collecting device; 51, waste liquid collecting pipeline. DETAILED DESCRIPTION

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0022] In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation" "link" "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral connection: can be mechanical connection, also can be electrical connection: can be direct connection, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood through specific circumstances.

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled person in the art without creative labor belong to the scope of protection of the utility model.

[0025] As shown in the figure, Figure 1 A phenol liquid on-line chromatographic analysis system, an on-line chromatographic analyzer 4 is connected with a phenol pipeline, at least one sample sampling point 2 and at least one sample return point 1 are arranged on the phenol pipeline; the main body of the on-line chromatographic analysis system is a heat preservation box 3, an anti-explosion heater 31, an on-line chromatographic analyzer 4 and a sample pipeline 34 are arranged in the heat preservation box 3, the sample sampling point 2 is connected with the on-line chromatographic analyzer 4 through the sample pipeline 34, the sample return point 1 is connected with the sample sampling point 2 through the sample pipeline 34, and the outer side of the sample pipeline 34 is wound with a coil heating belt 341, and the coil heating belt 341 is heated by the anti-explosion heater 31.

[0026] In actual application, the sample return point 1 and the sample sampling point 2 belong to a part of the phenol pipeline, and the sample return point 1 and the sample sampling point 2 are arranged in sequence along the direction of phenol transportation in the phenol pipeline, that is, the pipeline flow direction is from the sample return point 1 to the sample sampling point 2, and the sampled phenol is not all used for chromatographic analysis, but the excess phenol is returned to the pipeline.

[0027] The specification of the sample pipeline 34 is 6mm, the outer side of the coil heating belt 341 is wound with a high-power gold wire electric heating belt, the coil heating belt 341 is arranged on all the sample pipelines 34 in the heat preservation box 3, the anti-explosion heater 31 heats through the coil heating belt 341, and heats through air bath, so that the heating and heat preservation in the heat preservation box 3 are realized.

[0028] The temperature in the heat preservation box 3 can be adjusted according to actual conditions, and in the embodiment, the heat preservation box 3 needs to be heat preserved to 60°C.

[0029] The sample pipeline 34 is provided with a bypass filter 33. The phenol liquid about to enter the online chromatographic analyzer 4 is filtered through the bypass filter 33 to avoid the existence of related substances in the phenol liquid which affect the analysis results.

[0030] In this embodiment, the sample pipeline 34 entering the bypass filter 33 is only one, and the sample pipeline 34 flowing out is two.

[0031] A part of the phenol liquid filtered by the bypass filter 33 passes through a sample flow meter 35 provided on the sample pipeline 34 between the bypass filter 33 and the online chromatographic analyzer 4. The sample flow meter 35 is also provided with a flow alarm device 351 for alarming when the phenol liquid about to flow into the online chromatographic analyzer 4 through the bypass filter 33 exceeds the preset maximum flow value or the maximum flow value that the online chromatographic analyzer 4 can receive, so as to remind the staff around the online chromatographic analysis system to intervene, avoiding accidents and problems of the online chromatographic analyzer 4.

[0032] In actual application, the flow alarm device 351 can also be transmitted to a farther place through wired or wireless mode, or pre-alarm is concentrated, but considering that the signal in the heat preservation box 3 is not good, an antenna should be connected outside the heat preservation box 3.

[0033] A valve can also be provided on the sample pipeline 34 between the bypass filter 33 and the sample flow meter 35 for closing to stop the phenol liquid in the bypass flow meter 36 from flowing to the sample flow meter 35 in an emergency.

[0034] The other part of the phenol liquid filtered by the bypass filter 33 passes through a bypass flow meter 36 provided on the sample pipeline 34 between the bypass filter 33 and the sample return point 1 to measure the flow of the phenol liquid returning to the sample return point 1.

[0035] The sample pipeline 34 between the bypass filter 33 and the sample sampling point 2 is provided with a first electric heating pipe line 21 and a sample valve 22, and the sample pipeline 34 between the bypass filter 33 and the sample return point 1 is provided with a second electric heating pipe line 11 and a return valve 12. The electric heating pipe lines are used to heat the sample pipeline 34 outside the heat preservation box 3 to keep the sampling and returning phenol in liquid state.

[0036] The first electric heating pipe line 21 and the second electric heating pipe line 11 both maintain a constant temperature of 60°C, which is consistent with the temperature inside the heat preservation box 3.

[0037] The online chromatographic analysis system also includes a waste liquid collecting device 5 connected with the online chromatographic analyzer 4 through a waste liquid collecting pipeline 51 and the sample pipeline 34, which is used to process the waste liquid in the online chromatographic analyzer 4 to avoid pollution.

[0038] The on-line chromatographic analyzer 4 is also connected with an on-line zero gas generator 41, an on-line hydrogen gas generator 42 and other conventional components of the on-line chromatographic analyzer 4, the on-line zero gas generator 41 is connected with an instrument valve 43, and the instrument valve 43 is used for controlling the instrument air to enter the on-line chromatographic analyzer 4.

[0039] The complete operation flow of the phenol liquid on-line chromatographic analysis system is as follows: the sample sampling point 2 samples from the phenol pipeline, after sampling, the phenol is changed into liquid state under the heating of the first electric heat tracing pipeline 21, at this time, the explosion-proof electric heater full pipe heating band 341 keeps the temperature inside the heat preservation box 3 and the temperature in the sample pipeline 34 at 60°C, the obtained sample passes through the sampling valve 32, the bypass filter 33, the sample flow meter 35 to the on-line chromatographic analyzer 4 in sequence, and the waste liquid after analysis is collected through the sample pipeline 34 and the waste liquid collecting pipeline 51; in addition, another part of the phenol liquid passing through the bypass filter 33 returns to the sample return point 1 through the bypass flow meter 36, and the on-line chromatographic analysis of the phenol liquid is completed.

[0040] In actual application, the on-line chromatographic analysis system can also be provided with a heat dissipation device to avoid other adverse effects caused by the temperature being too high in the heat preservation box 3.

[0041] The utility model discloses a phenol liquid on-line chromatographic analysis system, the on-line chromatographic analysis system is connected with phenol pipeline, be equipped with at least one sample sampling point 2 and at least one sample return point 1 on the phenol pipeline, the main part of on-line chromatographic analysis system is heat preservation box 3, be equipped with explosion -proof heater 31, on-line chromatographic analyzer 4 and sample pipeline 34 in heat preservation box 3, sample sampling point 2 is connected with on-line chromatographic analyzer 4 through sample pipeline 34, sample return point 1 is connected with sample sampling point 2 through sample pipeline 34, the outside of sample pipeline 34 is wound with coil heating band 341, the coil heating band 341 is heated through explosion -proof heater 31, through using coil heating structure and explosion -proof heater 31, realize keeping the temperature in the box, pipeline to be 60 °C, make the phenol obtained by sampling be in liquid state all the time, convenient for on-line chromatographic analyzer 4 direct analysis to sample.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A phenol liquid on-line chromatographic analysis system, said on-line chromatographic analysis system being connected to a phenol pipeline, characterized in that, The phenol pipeline is provided with at least one sample sampling point (2) and at least one sample return point (1), the main body of the online chromatographic analysis system is a heat preservation box (3), an anti-explosion heater (31), an online chromatographic analyzer (4) and a sample pipeline (34) are arranged in the heat preservation box (3), the sample sampling point (2) is connected with the online chromatographic analyzer (4) through the sample pipeline (34), the sample return point (1) is connected with the sample sampling point (2) through the sample pipeline (34), a coiled pipe heating belt (341) is wound outside the sample pipeline (34), and the coiled pipe heating belt (341) is heated by the anti-explosion heater (31); a bypass filter (33) is further arranged on the sample pipeline (34), a sample inlet flow meter (35) is arranged on the sample pipeline (34) between the bypass filter (33) and the online chromatographic analyzer (4), a first electric heating pipe line (21) and a sample inlet valve (22) are arranged on the sample pipeline (34) between the bypass filter (33) and the sample sampling point (2), and a second electric heating pipe line (11) and a return valve (12) are arranged on the sample pipeline (34) between the bypass filter (33) and the sample return point (1).

2. The phenol liquid online chromatography system of claim 1, wherein, The sample inlet flow meter (35) is further provided with a flow alarm device (351).

3. The phenol liquid online chromatography system of claim 1, wherein, The sample pipeline (34) between the first electric heating pipe line (21) and the bypass filter (33) is further provided with a sampling valve (32).

4. The phenol liquid online chromatography system of claim 1, wherein, The sample pipeline (34) between the second electric heating pipe line (11) and the bypass filter (33) is further provided with a bypass flow meter (36).

5. The phenol liquid online chromatography system of claim 1, wherein, The online chromatographic analysis system further comprises a waste liquid collecting device (5), and the waste liquid collecting device (5) is connected with the online chromatographic analyzer (4) through a waste liquid collecting pipeline (51) and the sample pipeline (34).

6. The phenol liquid online chromatography system of claim 1, wherein, The online chromatographic analyzer (4) is further connected with an online zero gas generator (41) and an online hydrogen gas generator (42).

7. The phenol liquid online chromatography system of claim 6, wherein, The online zero gas generator (41) is further connected with an instrument valve (43).

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