Online continuous detection device for oil quality

Abstract

The utility model provides an online continuous detection device for oil quality. The online continuous detection device comprises an optical detection module, the sampling cavity is provided with an inlet and an outlet which are communicated with an oil product pipeline; the other end of the atomizer is communicated with the combustion chamber; the atomized oil product is combusted in the combustion chamber, and the optical detection module continuously obtains the content of sulfur in the combusted gas. The device has the advantages of continuous detection and the like.

Description

Technical Field

[0001] The utility model relates to oil product analysis, in particular to an online continuous detection device for oil product quality. Background Art

[0002] The sulfur content in petrochemical products is an important indicator. There are strict upper sulfur content limits for crude oil, intermediate products, and downstream finished products. For example, the current National VI sulfur content requirement for gasoline and diesel is not higher than 10ppm. Total sulfur analysis of oil products is mainly used in the stages of oil hydrogenation, catalytic reforming, and oil blending in oil refineries, as well as related petrochemical products such as gasoline, diesel, naphtha, kerosene, etc. By online monitoring of sulfur content, production can be guided and product quality can be improved.

[0003] There are three main methods for testing total sulfur in oil products used in online analyzers:

[0004] 1. Lead acetate paper tape method. After the sample sulfur is reduced to H2S, it is contacted with a white paper tape with lead acetate. The reaction generates black lead sulfide attached to the paper tape. The sulfur content of the oil is obtained by accurately measuring the color change. Envent and Galvanic products use this method.

[0005] The disadvantages of this method are that a large amount of hydrogen is needed to reduce sulfur, and the paper tape needs to be replaced frequently, and the safety and convenience are not high.

[0006] 2. Ultraviolet fluorescence method. All sulfur in the sample is oxidized to SO2 at a high temperature above 1000℃. SO2 is stimulated to emit light by ultraviolet fluorescence. The intensity of the light emission is proportional to the sulfur content. The sulfur content is obtained by measuring the intensity of the excitation light. This method is also the arbitration method used in the standard. Products from PAC, Thermo Fisher, Teledyne and other companies use this method.

[0007] The disadvantages of this method are: the injection requires the use of a rotary valve, intermittent injection, non-continuous detection, and a fixed injection volume. Samples of different concentrations require the replacement of devices (generally divided into high and low range versions). The rear pipeline of the rotary valve relies on gas to push the oil, and when the viscosity is high, it is easy to cause residual measurement errors. Thermoelectric uses a gasifier to pre-gasify the oil and then mix it with the carrier gas. The system of this solution is relatively complex, and it is still a non-continuous detection.

[0008] 3. X-ray fluorescence method. X-ray fluorescence method is a non-contact, non-destructive measurement method that uses X-rays to directly excite sulfur atoms in the sample to emit light, and measures the fluorescence intensity to obtain the sulfur content. XOS's products use this method.

[0009] The disadvantages of this method are: the detection limit is not as good as the ultraviolet fluorescence method; it has very high performance requirements for the film that can transmit X-rays on the irradiation window; oil stains, wrinkles, thickness, etc. have a great impact on the measurement results. Summary of the invention

[0010] In order to solve the deficiencies in the above-mentioned prior art solutions, the utility model provides an online continuous detection device for oil quality.

[0011] The purpose of this utility model is achieved through the following technical solutions:

[0012] The oil quality online continuous detection device comprises an optical detection module; the oil quality online continuous detection device also comprises:

[0013] A sampling chamber, wherein the sampling chamber has an inlet and an outlet, and the inlet and the outlet are connected to an oil product pipeline;

[0014] An atomizer, one end of which is connected to the sampling cavity, and the other end of which is connected to the combustion chamber;

[0015] A combustion chamber is provided in which the atomized oil product is burned, and the optical detection module continuously obtains the sulfur content in the post-combustion gas.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Continuous detection is achieved;

[0018] True continuous real-time sampling detection, achieving "zero delay";

[0019] 2. Wide range of applications;

[0020] Through pressure feedback control, the injection flow rate is dynamically adjusted to achieve wide range sulfur concentration sample detection without high and low range switching;

[0021] 3. Simple structure;

[0022] The oil is atomized into fine droplets to avoid local incomplete combustion of large clumps of liquid, and a gasifier is not required. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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:

[0024] Figure 1 It is a structural schematic diagram of an online continuous oil quality detection device according to an embodiment of the utility model;

[0025] Figure 2It is a schematic structural diagram of a combustion chamber and an atomizer according to an embodiment of the utility model. DETAILED DESCRIPTION

[0026] Figure 1-Figure 2 The following description describes optional specific 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. Those skilled in the art should understand that variations or substitutions derived from these specific embodiments will be within the scope of the present invention. Those skilled in the art should understand 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 specific embodiments, but is only limited by the claims and their equivalents.

[0027] Example 1

[0028] The utility model embodiment of the oil quality online continuous detection device, such as Figure 1 As shown, the oil quality online continuous detection device includes:

[0029] A sampling chamber 11, wherein the sampling chamber 11 has an inlet and an outlet, and the inlet and the outlet are connected to the oil product pipeline 10;

[0030] An atomizer 21, one end of the atomizer 21 is connected to the sampling chamber 11, and the other end of the atomizer 21 is connected to the combustion chamber 31;

[0031] The atomized oil product is burned in the combustion chamber 31 , and the optical detection module continuously obtains the sulfur content in the post-combustion gas.

[0032] In order to fully burn the atomized oil, further, Figure 2 As shown, the combustion chamber 31 includes:

[0033] A body, wherein the body has a first channel 32, a second channel 33 and a third channel 34 which are arranged in sequence and connected and have gradually increasing inner diameters;

[0034] The body further has a fourth channel 35 , which is arranged obliquely relative to and connected to the second channel 33 , and the outlet of the atomizer 21 is located in the fourth channel 35 .

[0035] In order to improve the atomization efficiency, further, the atomizer 21 includes a liquid channel 22 and a gas channel 23, and the angle between the flow direction in the liquid channel 22 and the flow direction in the gas channel 23 is a right angle or an acute angle;

[0036] The diameter of the outlet 25 of the atomizer 21 is smaller than the diameter of the liquid channel 22 .

[0037] In order to prevent oil from remaining in the flow channel, the liquid channel 22 is further inclined downward.

[0038] In order to adjust the oil product flow rate entering the atomizer 21, the oil product quality online continuous detection device further includes:

[0039] The pressure adjustment unit 41 is used to adjust the pressure in the sampling cavity 11 .

[0040] In order to transport oil products, the oil product quality online continuous detection device further includes:

[0041] The gear pump 51 is disposed between the oil pipeline 10 and the sampling chamber 11 .

[0042] In order to prevent excessive oil in the sampling chamber 11, the oil quality online continuous detection device further includes:

[0043] The liquid level meter 61 is used to detect the liquid level in the sampling chamber 11 .

[0044] Example 2

[0045] An application example of an online continuous oil quality detection device according to Example 1 of the utility model.

[0046] In this application example, Figure 1 As shown, the gear pump 51 is arranged on the inlet and outlet pipes between the oil product pipe 10 and the sampling chamber 11. The liquid level meter 61 is arranged in the sampling chamber 11 to detect the liquid level in real time. The pressure adjustment unit 41 adopts a vacuum pump to adjust the pressure in the sampling chamber 11, that is, to adjust the output flow rate of the oil product. The pressure sensor 71 outputs the pressure at the inlet end of the sampling pipe in the sampling chamber 11 in real time. The outlet end of the sampling pipe is connected to the atomizer 21.

[0047] like Figure 2 As shown, the atomizer 21 has a linear liquid channel 22 and a gas channel 23, and the angle between the liquid flow direction in the liquid channel 22 and the gas flow direction in the gas channel 23 is a right angle. The diameter of the atomization outlet 25 of the atomizer 21 is smaller than the diameter of the liquid channel 22.

[0048] The combustion chamber 31 includes a linear first channel 32, a second channel 33 and a third channel 34 which are arranged in sequence and connected. The fourth channel 35 is inclined downward and connected to the second channel 33, with an angle of 45 degrees. The outlet 25 of the atomizer 21 is located in the fourth channel 35.

[0049] The working mode of the online continuous detection device for oil quality in the embodiment of the utility model is:

[0050] Under the delivery of the gear pump 51 , the oil is delivered from the oil pipeline 10 to the sampling chamber 11 , and then flows back into the oil pipeline 10 .

[0051] Under the pressure provided by the pressure adjustment unit 41, the oil in the sampling chamber 11 enters the atomizer 21 from the sampling pipe;

[0052] The carrier gas (such as nitrogen) enters the gas channel 23, the oil is atomized, and is discharged from the atomization outlet 25 to the second channel 33; at the same time, the combustion gas flows through the first channel 32 and the second channel 33 in sequence, carrying the atomized oil into the third channel 34 with a larger inner diameter, and burns, and the sulfur in the oil is oxidized into sulfur dioxide;

[0053] The optical detection module based on ultraviolet fluorescence method continuously outputs the content of sulfur dioxide in the third channel 34, thereby obtaining the sulfur content in the oil product.

[0054] In the above process, if the fluorescence intensity detected by the optical detection module is too low, the oil flow entering the atomizer 21 needs to be increased: the pressure adjustment unit 41 increases the pressure in the sampling chamber 11, and the pressure sensor 71 feeds back the pressure.

[0055] If the fluorescence intensity detected by the optical detection module is too high, the oil flow entering the atomizer 21 needs to be lowered: the pressure adjustment unit 41 reduces the pressure in the sampling chamber 11, and the pressure sensor 71 feeds back the pressure.

[0056] Example 3

[0057] The application example of the on-line continuous oil quality detection device according to the first embodiment of the utility model is different from the second embodiment in that:

[0058] 1. The pressure adjustment unit 41 uses an air cylinder.

[0059] 2. In the atomizer 21, the angle between the gas flow direction in the gas channel 23 and the liquid flow direction in the liquid channel 22 is an acute angle.

Claims

1. An online continuous oil quality detection device, comprising an optical detection module; characterized in that: The oil quality online continuous detection device also includes: A sampling chamber, wherein the sampling chamber has an inlet and an outlet, and the inlet and the outlet are connected to an oil product pipeline; An atomizer, one end of which is connected to the sampling cavity, and the other end of which is connected to the combustion chamber; A combustion chamber is provided in which the atomized oil product is burned, and the optical detection module continuously obtains the sulfur content in the post-combustion gas.

2. The on-line continuous detection device for oil quality according to claim 1 is characterized in that: The combustion chamber comprises: A body, wherein the body has a first channel, a second channel and a third channel which are sequentially arranged and connected and have gradually increasing inner diameters; The body further has a fourth channel, which is arranged obliquely relative to the second channel and is connected to the second channel, and the outlet of the atomizer is located in the fourth channel.

3. The on-line continuous detection device for oil quality according to claim 1 is characterized in that: The atomizer comprises a liquid channel and a gas channel, and the angle between the flow direction in the liquid channel and the flow direction in the gas channel is a right angle or an acute angle; The diameter of the outlet of the atomizer is smaller than the diameter of the liquid channel.

4. The on-line continuous detection device for oil quality according to claim 3 is characterized in that: The liquid channel is inclined downward.

5. The on-line continuous detection device for oil quality according to claim 1 is characterized in that: The oil quality online continuous detection device also includes: A pressure adjustment unit is used to adjust the pressure in the sampling chamber.

6. The on-line continuous detection device for oil quality according to claim 5 is characterized in that: The pressure adjustment unit is a vacuum pump or a cylinder.

7. The on-line continuous detection device for oil quality according to claim 1 is characterized in that: The oil quality online continuous detection device also includes: A gear pump is arranged between the oil pipeline and the sampling chamber.

8. The on-line continuous detection device for oil quality according to claim 1 is characterized in that: The oil quality online continuous detection device also includes: A liquid level meter is used to detect the liquid level in the sampling cavity.

9. The on-line continuous detection device for oil quality according to claim 1 is characterized in that: The optical detection module is an ultraviolet fluorescence detection module.

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