Flue gas collecting device for measuring ash content of petroleum product

Abstract

The utility model discloses a flue gas collecting device for measuring the ash content of a petroleum product. The flue gas collecting device comprises a first collecting container, a second collecting container and a spraying unit, the first collecting container is connected and communicated with a combustion chamber for measuring the ash content of the petroleum product and is used for introducing flue gas in the combustion chamber; the spraying unit is connected and communicated with the first collecting container and is used for injecting spraying liquid into the first collecting container; the second collecting container is connected and communicated with the first collecting container and used for receiving the gas-liquid mixture in the first collecting container. The flue gas collecting device is simple, reliable, convenient to practice and suitable for flue gas treatment in a small laboratory environment.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum ash determination, in particular to a flue gas collecting device used for determining the ash content of petroleum products. Background Art

[0002] Petroleum ash determination is a test method used to assess the non-volatile mineral content of petroleum products. This test is crucial for petroleum product production, quality control, equipment maintenance, environmental protection, and regulatory compliance. Ash content refers to the non-combustible material remaining after complete combustion of a petroleum product under specified conditions, typically expressed as a percentage by mass. These non-combustible materials primarily consist of metal salts and metal oxides generated after the complete combustion of lubricating oil. The basic principle of ash determination is to heat and burn the petroleum product, ultimately subjecting it to intense heat to decompose or oxidize the metal salts into metal oxides (ash residue). The residue is then cooled, weighed, and expressed as a mass fraction. Carbonaceous flue gas is produced during the combustion of petroleum products.

[0003] The current process of determining the ash content of petroleum products is usually carried out in a laboratory environment. Unlike an industrial plant environment, the flue gas in a laboratory environment is not generated continuously, and the amount of flue gas produced continuously in an industrial plant environment is much smaller. Therefore, when determining the ash content of petroleum products in a laboratory environment, it is not suitable to be equipped with the large and complex flue gas treatment systems used in industrial production. Usually, the flue gas is discharged directly or through a fume hood. However, direct emission or the use of a fume hood to discharge the flue gas has the following problems: the flue gas has a high carbon content and is black in color, so direct emission will pollute the environment; the use of a fume hood to collect and then discharge the flue gas will cause the inner wall of the fume hood to become blackened, which is not conducive to the internal cleanliness and management of the laboratory. In addition, the soot deposited in the pipes can easily clog the pipes and cause poor ventilation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a flue gas collecting device suitable for measuring the ash content of petroleum products.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to provide a flue gas collection device for measuring the ash content of petroleum products, which includes a first collecting container, a second collecting container and a spray unit; the first collecting container is connected and communicated with the combustion chamber for measuring the ash content of petroleum products, and is used to access the flue gas in the combustion chamber; the spray unit is connected and communicated with the first collecting container, and is used to inject spray liquid into the first collecting container; the second collecting container is connected and communicated with the first collecting container, and is used to receive the gas-liquid mixture in the first collecting container.

[0006] In some embodiments, the spray unit includes a spray liquid source, a first liquid infusion pipeline and a spray plate; the spray liquid source is arranged outside the first collecting container, the spray plate is arranged inside the first collecting container, and several spray heads are arranged on the spray plate, and the first liquid infusion pipeline is connected between the spray liquid source and the spray head.

[0007] In some embodiments, the spray unit further includes a plurality of trays connected to the inner wall of the first collecting container.

[0008] In some embodiments, a plurality of the trays are arranged vertically and / or horizontally spaced apart in the first collecting container.

[0009] In some embodiments, the spray plate is disposed on the top surface of the inner wall of the first collecting container.

[0010] In some embodiments, it also includes a liquid level detection unit; the liquid level detection unit is connected to the first collection container and is used to detect the liquid level in the first collection container; the spray unit also includes a first valve, and the first valve is connected to the first liquid infusion pipe; the liquid level detection unit is communicatively connected to the first valve; and / or, the smoke collection device also includes a second liquid infusion pipe connected between the second collection container and the first collection container and a second valve connected to the second liquid infusion pipe, and the liquid level detection unit is communicatively connected to the second valve.

[0011] In some embodiments, it also includes a filtering unit and a reflux pipe; the filtering unit is connected and communicated with the second collecting container, and is used to filter the liquid in the second collecting container; the reflux pipe is connected between the filtering unit and the first infusion pipe, and is used to return the filtered liquid to the first infusion pipe.

[0012] In some embodiments, the second collecting container includes a first chamber and a second chamber that are not connected, the first chamber is connected and connected to the first collecting container, the filter unit is connected between the first chamber and the second chamber, and the return pipe is connected and connected to the second chamber at one end close to the filter unit.

[0013] In some embodiments, the filtration unit includes at least one of a distillation device, an ion exchange resin, an activated carbon adsorption device, a chemical precipitation device, an oxidation-reduction device, and a pH adjustment device.

[0014] In some embodiments, the invention further includes a flue gas duct connected and communicating between the first collecting container and the combustion chamber, and an adsorption unit disposed inside the flue gas duct.

[0015] This utility model has at least the following beneficial effects: After the flue gas in the first collection container fully contacts and mixes with the spray liquid produced by the spray unit, a gas-liquid mixture is formed in the first collection container. The second collection container is connected to and communicates with the first collection container, and is used to receive this gas-liquid mixture in the first collection container. This flue gas collection device is simple, reliable, and easy to implement, making it suitable for flue gas treatment in small laboratory environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 This is a schematic structural diagram of a smoke collection device according to a first embodiment of the present invention;

[0018] Figure 2 It is a structural schematic diagram of a smoke collection device according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0020] See also Figure 1 , Figure 1 The smoke collecting device of the first embodiment of the present invention is shown. The smoke collecting device is used for collecting smoke during the ash content determination process of petroleum products. The smoke collecting device mainly includes a first collecting container 1, a second collecting container 2 and a spray unit 3.

[0021] Among them, the first collecting container 1 is connected and communicated with the combustion chamber 40 for measuring the ash content of petroleum products, and is used to receive the flue gas in the combustion chamber 40. It should be noted that the combustion chamber 40 refers to the space where the petroleum product is burned during the ash content measurement process of the petroleum product. The spray unit 3 is connected and communicated with the first collecting container 1, and is used to inject spray liquid into the first collecting container 1. The spray liquid can be a fine water mist, specifically water, alkaline solution, etc. generated by atomization. Specifically, the flue gas components generated during the ash content measurement of petroleum products mainly include: (1) carbon-containing substances: unburned carbon residue, unburned charcoal dust formed in the furnace by the colloid asphalt in heavy oil, and carbon black dust; (2) non-metallic oxides: sulfur oxides (such as sulfur dioxide SO2), nitrogen oxides (such as NO x), carbon oxides (such as CO and CO2), etc.; (3) metal oxides: oxides of vanadium, nickel, iron, calcium, etc. Among them, carbon-containing substances account for a relatively large proportion, making the flue gas appear black and gray as a whole. Spraying liquid can help settle the flue gas, reduce the flue gas temperature and dilute the harmful substances in the flue gas. Spraying liquid can also capture and absorb some water-soluble gases and particulate matter in the flue gas. For example, carbon dioxide (CO2), sulfur dioxide (SO2), sulfur trioxide (SO3) and nitrogen oxides (such as NO2) are soluble in water and combine with water to form acidic solutions. In order to neutralize these acidic solutions, an alkaline solution can be used as the spraying liquid.

[0022] As mentioned above, after the flue gas in the first collecting container 1 is fully contacted and mixed with the spray liquid produced by the spray unit 3, a gas-liquid mixture will be formed in the first collecting container 1. The second collecting container 2 is connected and communicated with the first collecting container 1, and is used to receive these gas-liquid mixtures in the first collecting container 1. Because the volume of the petroleum sample used for the ash content determination of petroleum products is small, and the flue gas in the combustion chamber 40 (laboratory) environment is not continuously generated, the amount of flue gas discharged is also small. Therefore, the second collecting container 2 can be used to receive and store the gas-liquid mixture from the first collecting container 1. When the capacity of the gas-liquid mixture in the second collecting container 2 reaches a certain level, the second collecting container 2 can be transported as a whole to a professionally qualified waste liquid treatment manufacturer for purification treatment. Such a flue gas collection device is simple, reliable, easy to practice, and suitable for flue gas treatment in a small laboratory environment.

[0023] like Figure 1 As shown, in some embodiments, the spray unit 3 includes a spray liquid source 31, a first liquid infusion pipeline 32, and a spray plate 33. The spray liquid source 31 is disposed outside the first collection container 1, while the spray plate 33 is disposed inside the first collection container 1. Several spray heads 330 are mounted on the spray plate 33, and the first liquid infusion pipeline 32 connects between the spray liquid source 31 and the spray heads 330. Specifically, the spray liquid source 31 can be housed in a liquid container outside the first collection container 1, or directly fed with tap water. If an alkaline solution is desired as the spray liquid, the spray liquid can be placed in a dedicated container. The spray head 330 atomizes water by physically breaking it down into tiny droplets, and the spray head 330 can utilize existing technology. The spray liquid from the spray liquid source 31 enters the first liquid infusion pipeline 32 and is atomized into countless tiny droplets (in the form of a mist) by the spray head 330. After the flue gas passes through the spray, its temperature decreases, accelerating its settling. A portion of the soluble substances in the flue gas forms a solution with water, thereby forming a gas-liquid mixture in the first collection container 1. Multiple spray heads 330 can be provided, and the multiple spray heads 330 are evenly distributed at specific positions in the first collection container 1 to ensure that the flue gas is fully in contact with the spray liquid, achieving a better sedimentation effect.

[0024] Furthermore, if Figure 1 As shown, in some embodiments, the spray plate 33 can be disposed on the top surface of the inner wall of the first collection container 1. Thus, the spray head 330 on the spray plate 33 is also located on the top surface of the inner wall of the first collection container 1. As a result, the spray liquid covers a large area of ​​the rising flue gas from top to bottom, allowing the flue gas to fully contact the spray liquid and achieve a better settling effect.

[0025] like Figure 1 As shown, in some embodiments, the spray unit 3 further includes a plurality of trays 5 connected to the inner wall of the first collection container 1. The trays 5 can be plate-like objects of any shape. The trays 5 can be used to intercept the spray liquid and also create a disturbance effect on the rising flue gas, thereby increasing the contact area between the flue gas and the spray liquid, ensuring sufficient contact between the flue gas and the spray liquid and achieving a better sedimentation effect. Therefore, as the number of trays 5 increases, the sedimentation effect can be correspondingly optimized. The trays 5 can be selected according to actual needs, and the present invention does not limit the number of trays 5.

[0026] like Figure 1 As shown, in some embodiments, multiple trays 5 are arranged vertically and horizontally within the first collection container 1. That is, there are two vertical rows of trays 5 and two horizontal rows of trays 5, for a total of four trays 5. In other embodiments, all trays 5 are arranged vertically or horizontally within the first collection container 1. The trays 5 may have different lengths and may be arranged in a staggered pattern to increase the degree of disturbance of the flue gas by the trays 5 and ensure sufficient contact between the flue gas and the spray liquid.

[0027] like Figure 1As shown, in some embodiments, the smoke collection device further includes a liquid level detection unit 6. The liquid level detection unit 6 is connected to the first collection container 1 and is used to detect the liquid level in the first collection container 1. Furthermore, the spray unit 3 may also include a first valve 34, and the first valve 34 is connected to the first liquid infusion pipe 32. The liquid level detection unit 6 is communicatively connected to the first valve 34. That is, the liquid level detection unit 6 is capable of sending electrical signals. The first valve 34 can be a solenoid valve or other valve that can receive electrical signals and perform corresponding actions based on the electrical signals. For example, the liquid level detection unit 6 can be electrically and / or mechanically connected to the first valve 34 through a wire, and of course the two can also be wirelessly connected. Thus, the first valve 34 can perform two actions, opening and closing, based on the liquid level information detected by the liquid level detection unit 6. For example, the liquid level detection unit 6 continuously detects the liquid level in the first collecting container 1. When the liquid level in the first collecting container 1 reaches a first preset threshold value, the liquid level detection unit 6 outputs a corresponding electrical signal. The first valve 34 receives the corresponding electrical signal and closes the valve to cut off the fluid connection between the spray liquid source 31 and the spray head 330, that is, to stop spraying liquid into the first collecting container 1. In this way, the spraying can be automatically controlled to prevent the liquid level in the first collecting container 1 from being too high. The closing time and opening time of the first valve 34 can be adjusted using a computer program. The principle of automatic opening and closing of valves is a mature existing technology in the field of industrial control, and too many details will not be repeated here. The liquid level detection unit 6 may include at least one of a liquid level meter and a liquid level sensor.

[0028] like Figure 1As shown, in some embodiments, the smoke collection device further includes a second liquid infusion pipe 42 connected between the second collection container 2 and the first collection container 1, and a second valve 43 connected to the second liquid infusion pipe 42. The liquid level detection unit 6 is in communication with the second valve 43. Similarly, the second valve 43 can be a solenoid valve, or other valve that can receive electrical signals and perform corresponding actions based on the electrical signals. For example, the liquid level detection unit 6 can be electrically and / or mechanically connected to the second valve 43 via a wire, or the two can also be wirelessly connected. Thus, the second valve 43 can be opened or closed based on the liquid level information detected by the liquid level detection unit 6. For example, the second valve 43 can be in a normally closed state, that is, the second collection container 2 and the first collection container 1 are not connected to each other on a daily basis, and the smoke in the first collection container 1 is fully in contact with the spray liquid and gradually settles. The liquid level detection unit 6 continuously monitors the liquid level in the first collection container 1. When the liquid level in the first collection container 1 reaches a second preset threshold, the liquid level detection unit 6 outputs a corresponding electrical signal. The second valve 43 receives the corresponding electrical signal and opens, establishing fluid communication between the second collection container 2 and the first collection container 1. This allows the gas-liquid mixture in the first collection container 1 (including settled flue gas and the solution formed by the portion of the flue gas soluble in the spray liquid and the spray liquid) to be discharged into the second collection container 2. This automatically controls the discharge of the gas-liquid mixture in the first collection container 1, preventing the liquid level in the first collection container 1 from rising excessively and allowing sufficient time for the flue gas to gradually settle and partially dissolve in the spray liquid. Similarly, the closing and opening times of the second valve 43 can also be adjusted using a computer program. For example, when the normally closed second valve 43 receives the corresponding electrical signal, it opens and remains open for a preset period of time. The principle of automatic valve opening and closing is a mature state of the art in industrial control systems and will not be elaborated on in detail here.

[0029] The first preset threshold and the second preset threshold may be equal or different.

[0030] like Figure 1As shown, in some embodiments, the flue gas collection device further includes a flue gas duct 71 connected and communicating between the first collection container 1 and the combustion chamber 40, and an adsorption unit 72 disposed inside the flue gas duct 71. The adsorption unit 72 is used to preliminarily adsorb pollutants in the flue gas. Specifically, the adsorption unit 72 may include one or more of activated carbon, molecular sieve (molecular sieve has a uniform pore size distribution and can selectively adsorb molecules of a specific size, thereby achieving the separation of pollutants in flue gas), biochar (a porous carbon material made by pyrolysis of biomass under anoxic conditions, which has been proven to be an effective and economical adsorbent that can remove some gaseous pollutants in flue gas, such as SO2, nitrogen oxides, Hg, carbon dioxide and volatile organic compounds, etc.), fly ash (a by-product of coal-fired power plants, which can be used as an adsorbent to remove SO2, nitrogen oxides, Hg and gaseous organic compounds in flue gas after proper treatment), modified lignite (after modification, lignite can be used as an adsorbent for the adsorption of sulfur dioxide in flue gas, and has good adsorption and regeneration properties), and silica alumina (silica alumina material can adsorb nitrogen oxides in flue gas due to its porous structure and surface acidity).

[0031] like Figure 2 As shown, Figure 2 The second embodiment of the present invention shows a smoke collection device. Unlike the first embodiment, the smoke collection device further includes a filter unit 81 and a return pipe 82. The filter unit 81 is connected to and communicates with the second collection container 2, and is used to filter the liquid in the second collection container 2. The filter unit 81 performs preliminary filtration on the liquid from the first collection container 1 (for example, a solution formed by dissolving carbon dioxide, sulfur dioxide, sulfur trioxide, and nitrogen oxides in the smoke in water, and possibly also some metal oxides that are difficult to dissolve in water), and obtains a relatively pure liquid after preliminary filtration of the liquid from the first collection container 1 (relatively turbid liquid). The return pipe 82 is directly or indirectly connected between the filter unit 81 and the first liquid infusion pipe 32, and is used to return the filtered liquid to the first liquid infusion pipe 32. The relatively pure liquid after filtration returns to the first liquid infusion pipe 32 and can be reused as a spray liquid.

[0032] Furthermore, if Figure 2In the second embodiment shown, the second collection container 2 includes a first chamber 21 and a second chamber 22 that are not connected. The first chamber 21 and the first collection container 1 are connected and communicated with each other via a second liquid infusion pipe 42. A filter unit 81 is connected between the first chamber 21 and the second chamber 22, and a return pipe 82 is connected and communicated with the second chamber 22 at one end near the filter unit 81. Specifically, the smoke collection device includes a third liquid infusion pipe 83, which is connected between the first chamber 21 and the second chamber 22. The filter unit 81 is connected to the third liquid infusion pipe 83. The return pipe 82 is indirectly connected to the filter unit 81 via the second chamber 22. Furthermore, a first pump 84 and a third valve 86 are connected to the third liquid infusion pipe 83, and a second pump 85 and a fourth valve 87 are connected to the return pipe 82. The first pump 84 and the second pump 85 serve as power sources for the flow of liquid. Driven by the first pump 84, the liquid in the second collection container 2 enters the third liquid delivery pipe 83 and flows through the filter unit 81. The filtered liquid enters the second chamber 22. Driven by the second pump 85, the liquid in the second chamber 22 flows from the return pipe 82 to the first liquid delivery pipe 32 and is reused as a spray liquid. The third valve 86 is used to control the opening and closing of the third liquid delivery pipe 83. The fourth valve 87 is used to control the opening and closing of the return pipe 82.

[0033] Of course, in some other embodiments, a pump may not be provided, but the gravity difference of the liquid may be used to achieve the self-flow of the liquid. For example, a height difference may be established between the first collecting container 1 and the second collecting container 2, and between the second collecting container 2 and the first infusion pipeline 32, and the liquid flows sequentially between the first collecting container 1, the third infusion pipeline 83, the second collecting container 2, and the first infusion pipeline 32 by its own weight. However, due to the small amount of smoke generated in the laboratory environment, the amount of liquid accumulated in the first collecting container 1 and the second collecting container 2 in a short period of time may not be large. In the case of a small amount of liquid, when the driving force of the liquid's own weight is insufficient, the first pump 84 and the second pump 85 may be used to complete the sequential flow of the liquid.

[0034] Of course, in other embodiments, the return line 82 can also be directly connected to the filter unit 81. Liquid passing through the filter unit 81 can flow directly through the return line 82 to the first liquid delivery line 32 without passing through the second chamber 22. However, as previously mentioned, if the amount of liquid is low, the filtered liquid can be temporarily stored in the second chamber 22. When the filtered liquid reaches a certain amount, the fourth valve 87 is opened to direct the filtered liquid to the first delivery line for reuse.

[0035] Specifically, the filtration unit 81 may include at least one of a distillation device, an ion exchange resin, an activated carbon adsorption device, a chemical precipitation device, a redox device, and a pH adjustment device. That is, the filtration unit 81 may include one or more of a distillation device, an ion exchange resin, an activated carbon adsorption device, a chemical precipitation device, a redox device, and a pH adjustment device. The distillation device, the ion exchange resin, the activated carbon adsorption device, the chemical precipitation device, the redox device, and the pH adjustment device may adopt existing technologies and will not be described in detail here. Different devices may be used to achieve different degrees of filtration of the turbid liquid in the first chamber 21, and correspondingly, liquids of different compositions may be obtained in the second chamber 22. These liquids may be refluxed to the first liquid infusion pipe 32 through the reflux pipe 82 and reused as spray liquids to accelerate the sedimentation of the flue gas.

[0036] Of course, the filter unit 81 and the return pipe 82 are not necessary. Figure 1 In the embodiment shown, since the amount of smoke generated in the laboratory environment is small, the filter unit 81 and the return pipe 82 may not be provided, and the second collection container 2 can be directly transported as a whole to a professional waste liquid treatment manufacturer for purification treatment.

[0037] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A flue gas collection device for measuring ash content of petroleum products, characterized in that: It comprises a first collecting container (1), a second collecting container (2) and a spray unit (3); The first collecting container (1) is connected to and communicates with the combustion chamber (40) for measuring the ash content of petroleum products, and is used to receive the flue gas in the combustion chamber (40); The spray unit (3) is connected to and communicates with the first collecting container (1), and is used to inject spray liquid into the first collecting container (1); The second collecting container (2) is connected to and communicates with the first collecting container (1), and is used to receive the gas-liquid mixture in the first collecting container (1); The spray unit (3) comprises a spray liquid source (31), a first liquid delivery pipeline (32) and a spray plate (33); The spray liquid source (31) is arranged outside the first collecting container (1), the spray plate (33) is arranged inside the first collecting container (1), a plurality of spray heads (330) are arranged on the spray plate (33), and the first liquid delivery pipe (32) is connected between the spray liquid source (31) and the spray heads (330); The spray unit (3) further includes a plurality of trays (5) connected to the inner wall of the first collecting container (1); The smoke collection device further comprises a liquid level detection unit (6); the liquid level detection unit (6) is connected to the first collection container (1) and is used to detect the liquid level in the first collection container (1); The spray unit (3) further comprises a first valve (34), the first valve (34) being connected to the first liquid delivery pipe (32); the liquid level detection unit (6) being in communication connection with the first valve (34); the smoke collection device further comprises a second liquid delivery pipe (42) being connected between the second collection container (2) and the first collection container (1) and a second valve (43) being connected to the second liquid delivery pipe (42); the liquid level detection unit (6) being in communication connection with the second valve (43).

2. The fume collecting device for measuring ash content of petroleum products according to claim 1, characterized in that: The plurality of trays (5) are arranged vertically and / or horizontally in the first collecting container (1) at intervals.

3. The fume collecting device for measuring ash content of petroleum products according to claim 1, characterized in that: The spray plate (33) is arranged on the top surface of the inner wall of the first collecting container (1).

4. The fume collecting device for measuring ash content of petroleum products according to claim 1, characterized in that: Also included is a filter unit (81) and a return pipe (82); The filtering unit (81) is connected to and communicates with the second collecting container (2) and is used to filter the liquid in the second collecting container (2); the return pipe (82) is connected between the filtering unit (81) and the first infusion pipe (32) and is used to return the filtered liquid to the first infusion pipe (32).

5. The fume collecting device for measuring ash content of petroleum products according to claim 4, characterized in that: The second collecting container (2) comprises a first chamber (21) and a second chamber (22) which are not connected, the first chamber (21) is connected to and communicates with the first collecting container (1), the filter unit (81) is connected between the first chamber (21) and the second chamber (22), and the return pipe (82) is connected to and communicates with the second chamber (22) at one end close to the filter unit (81).

6. The fume collecting device for measuring ash content of petroleum products according to claim 4, characterized in that: The filtration unit (81) includes at least one of a distillation device, an ion exchange resin, an activated carbon adsorption device, a chemical precipitation device, an oxidation-reduction device, and a pH adjustment device.

7. The fume collection device for measuring ash content of petroleum products according to any one of claims 1 to 6, characterized in that: It also includes a flue gas duct (71) connected and communicating between the first collecting container (1) and the combustion chamber (40), and an adsorption unit (72) arranged inside the flue gas duct (71).

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