OCEC analyzer and method for manufacturing the same

Abstract

The present invention provides an OCEC analyzer and a manufacturing method thereof, wherein the OCEC analyzer comprises a light source, a detector and a filter membrane; a housing, wherein the housing has a groove or a through hole; a pipe, wherein the pipe is suitable for accommodating the filter membrane, wherein the pipe is arranged in the groove or the through hole and is supported; and a fixture, wherein the fixture filled between the groove and the pipe is solidified. The present invention has the advantages of accurate detection, good reliability, and the like.

Description

Technical Field

[0001] The present invention relates to carbon analysis, and in particular to an OCEC analyzer and a method for manufacturing the same. Background Art

[0002] The OCEC online analyzer uses the thermal decomposition-optical transmission method and the thermal decomposition-optical reflection method to separate OC (Organic Carbon) and EC (Elemental Carbon). During the heating stage of the heating furnace, the laser value will decrease (where the arrow points), resulting in inaccurate cutting points, thus affecting the ratio of OC and EC. Figure 1 shown.

[0003] In view of the above technical problems, the solutions adopted in the prior art are:

[0004] The laser is calibrated by a numerical correction method. Laser compensation correction is performed for the temperature effect of laser intensity. When analyzing a blank sample, first record the laser intensity I0 that passes through the filter membrane at the beginning of the analysis (when not heated), then record the laser intensity I and the filter membrane surface temperature T during the heating analysis process, fit the laser intensity change ΔI (I-I0) and T, and obtain the relationship ΔI (T) between ΔI and T. When actually analyzing the sample, deduct ΔI (T) from the measured laser intensity to obtain the laser intensity change caused only by OC carbonization and EC oxidation. The calibration results are shown in Figure 1. Figure 2 The shortcomings of this correction method are:

[0005] 1. Due to the uncertainty of heating furnace heating and film sampling, the correction method cannot accurately reflect the actual laser conditions, resulting in errors in OCEC segmentation;

[0006] 2. In actual use, the sampling membrane needs to be replaced regularly. The calibration curve cannot be applied to each new working condition. The calibration value needs to be retested, which is a cumbersome and unreliable process.

[0007] 3. The phenomenon of laser drop in different heating furnaces is different, and there is no guarantee that there will be a suitable relationship between ΔI and T, ΔI(T). Summary of the invention

[0008] In order to solve the deficiencies in the above-mentioned prior art solutions, the present invention provides an OCEC analyzer that does not require light intensity calibration, thereby achieving the invention objectives of accurate detection, good applicability and good reliability.

[0009] The objective of the present invention is achieved through the following technical solutions:

[0010] An OCEC analyzer, comprising a light source, a detector and a filter membrane; the OCEC analyzer also comprises:

[0011] A housing having a groove or a through hole;

[0012] A pipe, wherein the filter membrane is accommodated in the pipe, and the pipe is arranged in the groove or through hole and supported;

[0013] The fixture filled between the groove and the pipe is solidified.

[0014] The present invention also aims to provide a method for manufacturing the above-mentioned OCEC analyzer, and the present invention aims to be achieved through the following technical solutions:

[0015] A method for manufacturing an OCEC analyzer, the method comprising the following steps:

[0016] (A1) providing a housing having a groove or a through hole;

[0017] (A2) Fill the bottom of the groove or through hole with a fixing;

[0018] (A3) Press the pipe in the groove or through hole, and fill the space between the pipe and the shell with a soft fixing;

[0019] (A4) The fixture is heated to solidify the fixture.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Accurate detection;

[0022] A technical solution of room temperature fixation-high temperature curing was creatively proposed, which effectively prevented the problem of laser intensity reduction caused by heating during the working process, thereby improving the accuracy of detection;

[0023] 2. Good applicability;

[0024] The technical solution of room temperature fixation-high temperature curing is applicable to every OCEC analyzer;

[0025] 3. Good reliability;

[0026] After one fixation, the pipeline is firmly fixed, ensuring the long-term and stable operation of the OCEC analyzer;

[0027] 4. Simple process;

[0028] Fill the groove or through hole with soft fixings, press the pipe, and cure at high temperature. The construction is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. In the drawings:

[0030] Figure 1 is a schematic diagram of laser descent according to the prior art;

[0031] Figure 2 This is a schematic diagram of the calibration results based on the prior art.

[0032] Figure 3 is a schematic top view of an OCEC analyzer according to an embodiment of the present invention;

[0033] Figure 4 is another schematic top view of an OCEC analyzer according to an embodiment of the present invention;

[0034] Figure 5 yes Figure 4 AA view;

[0035] Figure 6 4 is a diagram showing the effect achieved by the OCEC analyzer according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] Figure 3-6 The following description describes the optional embodiments of the present invention to teach those skilled in the art how to implement and reproduce the present invention. In order to teach the technical solution of the present invention, some conventional aspects have been simplified or omitted. It should be understood by those skilled in the art that variations or substitutions derived from these embodiments will be within the scope of the present invention. It should be understood by those skilled in the art that the following features can be combined in various ways to form multiple variations of the present invention. Thus, the present invention is not limited to the following optional embodiments, but is only limited by the claims and their equivalents.

[0037] Example 1

[0038] Figure 3-5 The structure diagram of the OCEC analyzer according to the embodiment of the present invention is schematically shown as follows: Figure 3-5 As shown, the OCEC analyzer comprises:

[0039] The light source 31, the detector 32 and the particle filter are prior arts in this field, and the specific structure and working mode are not described in detail here;

[0040] A housing 11, wherein the housing 11 has a groove or a through hole 12;

[0041] A pipe 21, wherein the pipe 21 is suitable for accommodating the filter membrane, and the pipe 21 is disposed in the groove or through hole 12 and supported, that is, the pipe is supported at the groove or through hole, and the other parts are suspended;

[0042] The fixture 81 filled between the groove 12 and the pipe 21 is solidified, ensuring that the pipe 21 supported by the shell 11 does not shake, and the deformation is very small even at high temperature, thereby ensuring the stability of the light intensity of the light source.

[0043] In order to achieve that the fixture is soft at low temperature to facilitate fixing of the pipeline and solidifies at high temperature to stabilize the pipeline, further, the fixture is at least one of clay, clay, gypsum or high temperature glue.

[0044] In order to fix the pipeline and quickly heat the pipeline in a closed space formed in the shell, the shell further comprises:

[0045] A first shell, wherein the upper end of the first shell has a groove;

[0046] The second shell has a groove corresponding to the groove at the bottom end of the second shell, and the pipeline is stuck between the groove of the first shell and the groove of the second shell; the first shell and the second shell form a closed space.

[0047] In order to prevent the pipeline from being squeezed and broken in the up and down directions, further, the fixing object is only arranged in the groove of the first shell.

[0048] In order to provide the pipeline with a detection light path, a purge channel, a backflush channel and a catalytic reaction channel, the pipeline further has a light emitting end, a light receiving end, a gas inlet and a gas outlet end. The light emitting end and the light receiving end are arranged opposite to each other. The gas entering the pipeline through the gas inlet purges the filter membrane and is then discharged from the gas outlet end.

[0049] In order to form a backflush channel, further, the gas inlet includes a first inlet and a second inlet, the gas entering through the first inlet sweeps the filter membrane and then flows in a curved manner; the gas entering through the second inlet sweeps the filter membrane and then flows in a straight line.

[0050] In order to facilitate purging, further, the first inlet is arranged at the light emitting end, the second inlet is arranged at the back-blowing end 22 of the pipeline, and the back-blowing end and the gas outlet end 23 are arranged opposite to each other.

[0051] In order to form a closed space for heating and heat preservation of the pipeline, further, the shell is in a "sun" shape, and the upper end of the wall surrounding the cavity is provided with the groove or through hole.

[0052] The manufacturing method of the OCEC analyzer according to the embodiment of the present invention comprises the following steps:

[0053] (A1) providing a housing having a groove or a through hole;

[0054] (A2) Fill the bottom of the groove or through hole with a fixing;

[0055] (A3) Press the pipe in the groove or through hole, and fill the space between the pipe and the shell with a soft fixing;

[0056] (A4) The fixture is heated to solidify the fixture.

[0057] In order to solidify the fixed object, further, in step (A4), the heating temperature is 200-850°C.

[0058] Example 2

[0059] Application examples of the OCEC analyzer and the manufacturing method thereof according to embodiment 1 of the present invention.

[0060] In this application example, Figure 3-5 As shown, the light source 31 adopts a laser, and the detector 32 adopts a photoelectric sensor; the quartz pipe 21 is in a "cross" shape, wherein the light emitting end and the light receiving end are arranged oppositely, and the back-blowing end 22 and the gas output end 23 are arranged oppositely; the inner diameter between the light emitting end and the light receiving end in the pipe 21 is relatively large, the particle filter membrane is placed at the "cross" intersection, the inner diameter between the back-blowing end 22 and the gas output end 23 is relatively small, and the light emitting end has a gas inlet for passing helium or a mixture of helium and oxygen; the laser 31 is fixed at the light emitting end, the light receiving end is closed, and the detector 32 is fixed at the light receiving end; the catalyst is placed in the pipe between the filter membrane and the gas output end; the back-blowing end is suitable for passing back-blowing gas;

[0061] The first shell 11 is made of refractory bricks in a "sun" shape, forming two cavities, and the upper end of the wall forming the cavity has a groove, and this embodiment has 5 grooves; the second shell is made of refractory bricks in a "sun" shape, forming two cavities, and the lower end of the wall forming the cavity has a groove corresponding to the groove of the first shell, and the pipeline is stuck in the upper and lower grooves; the heating belt is wrapped around the outside of the pipeline between the laser and the detector, and the outside of the pipeline between the filter membrane and the gas output end, and is in the cavity formed by the first shell and the second shell, and the cavity is filled with thermal insulation cotton to prevent heat loss;

[0062] The fixture 81 is made of clay, which is soft at room temperature and is only placed in the five grooves 12 of the first shell 11. No fixture is placed in the grooves of the second shell. The pipe 21 is placed in the groove 12 and pressed. After the position of the pipe 21 is fixed, the clay in the groove 12 is sintered in a high temperature environment to solidify.

[0063] The manufacturing method of the OCEC analyzer of this application example comprises the following steps:

[0064] (A1) providing the first shell as described above, wherein the first shell has five grooves;

[0065] (A2) Fill the bottom of the groove or through hole with soft clay;

[0066] (A3) Press the pipe in the groove or through hole, and fill the space between the pipe and the shell with a soft fixture to ensure that the pipe does not shake and is in a horizontal state;

[0067] The second shell is covered on the first shell, and the pipe is stuck in the groove of the first shell and the second shell;

[0068] (A4) Turning on the heating belt to heat the fixture at a temperature of 850° C. for 24 hours, the fixture is cured.

[0069] The OCEC analyzer obtained in this application example has a laser spectrum test result such as Figure 6 As shown, Figure 1 Compared with the test results in , the laser intensity decrease (where the arrow points) has been significantly improved.

[0070] Example 3

[0071] The application example of the OCEC analyzer and the manufacturing method thereof according to the first embodiment of the present invention is different from the second embodiment in that:

[0072] 1. Using gypsum as a fixing, at room temperature, the viscous gypsum is filled between the pipe and the groove of the first shell; at high temperature, the viscous gypsum solidifies;

[0073] 2. The pipeline is in a "T" shape, the first inlet and the second inlet are shared, and a special backflush end is no longer provided, but the light emitting end and the light receiving end are still arranged relative to each other.

[0074] Example 4

[0075] The application example of the OCEC analyzer and the manufacturing method thereof according to the first embodiment of the present invention is different from the second embodiment in that:

[0076] 1. Using high temperature glue as a fixing, at room temperature, the high temperature glue is filled between the pipe and the groove of the first shell; at high temperature, the high temperature glue is solidified;

[0077] 2. The first shell has one through hole and four grooves, and the lower end of the second shell is flat and no longer has grooves;

[0078] 3. The blowback end of the pipe is inserted into the through hole, the supported part of the pipe is completely in the groove, and the upper end surface of the pipe is not higher than the upper end surface of the first shell.

[0079] The above embodiments are merely examples of the use of clay, gypsum and high temperature glue as the fixing material, and other materials such as clay may also be used.

Claims

1. An OCEC analyzer, comprising a light source, a detector and a filter membrane; characterized in that: The OCEC analyzer further comprises: A housing having a groove or a through hole; A pipe, wherein the filter membrane is suitable for accommodating the pipe, and the pipe is arranged in the groove or through hole and supported; the pipe has a light emitting end, a light receiving end, a back-blowing end and a gas outlet end, the light emitting end and the light receiving end are arranged opposite to each other, and the back-blowing end and the gas output end are arranged opposite to each other; the inner diameter between the light emitting end and the light receiving end in the pipe is larger, and the inner diameter between the back-blowing end and the gas output end is smaller; the pipe is in a "cross" shape, the particle filter membrane is placed at the intersection of the "cross", the light emitting end has a gas inlet for introducing helium, or a mixture of helium and oxygen; the light source is fixed at the light emitting end, the light receiving end is closed, and the detector is fixed at the light receiving end; The fixture filled between the groove and the pipe is solidified.

2. The OCEC analyzer according to claim 1, characterized in that: The fixing material is at least one of pottery clay, clay, gypsum or high temperature glue.

3. The OCEC analyzer according to claim 1, characterized in that: The housing comprises: A first shell, wherein the upper end of the first shell has a groove; The second shell has a groove corresponding to the groove at the bottom end of the second shell, and the pipeline is stuck between the groove of the first shell and the groove of the second shell; the first shell and the second shell form a closed space.

4. The OCEC analyzer according to claim 3, characterized in that: The fixing object is only arranged in the groove of the first shell.

5. The OCEC analyzer according to claim 1, characterized in that: The gas entering the pipeline through the gas inlet purges the filter membrane and then is discharged from the gas outlet.

6. The OCEC analyzer according to claim 5, characterized in that: The gas inlet comprises a first inlet and a second inlet. The gas entering through the first inlet sweeps the filter membrane and then flows in a curved manner; the gas entering through the second inlet sweeps the filter membrane and then flows in a straight line.

7. The OCEC analyzer according to claim 6, characterized in that: The first inlet is arranged at the light emitting end, the second inlet is arranged at the backflush end of the pipeline, and the backflush end and the gas outlet end are arranged opposite to each other.

8. The OCEC analyzer according to claim 1, characterized in that: The shell is in a "sun" shape, and the upper end of the wall surrounding the cavity is provided with the groove or through hole.

9. The method for manufacturing an OCEC analyzer according to claim 1, comprising the following steps: (A1) providing a housing having a groove or a through hole; (A2) Fill the bottom of the groove or through hole with a fixing; (A3) Press the pipe in the groove or through hole, and fill the space between the pipe and the shell with a soft fixing; (A4) The fixture is heated to solidify the fixture.

10. The method for manufacturing an OCEC analyzer according to claim 9, characterized in that: In step (A4), the heating temperature is 200-850°C.

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