A simulation device for detecting oil content in flue gas

Abstract

This utility model relates to the field of oil fume detection technology, specifically to a simulation device for detecting oil content in flue gas. It includes an oil-containing flue gas simulation device, a gas absorption device, a temperature control device, and a tail gas treatment device. The gas absorption device is placed inside the temperature control device. An infrared spectrophotometer is installed on the gas absorption device. The output end of the oil-containing flue gas simulation device is connected to the gas absorption device via a pipeline extending to the bottom of the gas absorption device. The output end of the gas absorption device is connected to the tail gas treatment device via a pipeline, and a gas flow meter is installed on the pipeline connecting the gas absorption device and the tail gas treatment device. Through the temperature control device, pressure reducing valve, flow meter, and other components, key parameters such as temperature and gas flow rate of the absorption environment can be precisely controlled. This allows for the systematic screening of the optimal conditions for the absorbent to absorb oil in the flue gas, thus providing a scientific basis for optimizing the absorption process.

Description

Technical Field

[0001] This utility model relates to the field of oil fume detection technology, and in particular to a simulation device for detecting oil content in flue gas. Background Technology

[0002] In the power workshops of coal chemical enterprises, thermal power generation plays a dominant role. Coal is the core fuel in these power plants, and to improve combustion efficiency, a certain proportion of diesel oil is typically added to the boiler. While this helps ensure complete coal combustion, it also introduces a series of potential problems. When the boiler system malfunctions, the oil content in the flue gas is highly likely to exceed standard limits. Furthermore, the subsequent ammonium sulfate system explicitly requires zero oil content in the flue gas. In addition, excessively high oil content in the flue gas released into the air can cause even more severe environmental pollution. Therefore, accurately assessing the oil content in the flue gas is of paramount importance for evaluating the operating efficiency of boiler auxiliary systems, ensuring the stable operation of the subsequent ammonium sulfate system, reducing air pollution, and promoting green and sustainable development for enterprises. The main methods for determining the oil content in gases are infrared spectrophotometry, ultraviolet spectrophotometry, and gravimetric methods. Among them, infrared spectrophotometry is favored due to its wide applicability and high accuracy, and has become a commonly used method for oil content determination. This method can not only analyze oils from different sources or types, but also obtain relatively accurate quantitative analysis results without the need for special screening or determination of specific standard oil samples.

[0003] Currently, my country has established a standard method (HJ637-2012) for determining oil content in water using infrared spectrophotometry and carbon tetrachloride as the extractant. This standard specifies the detailed steps and procedures for oil content determination using infrared spectrophotometry. However, my country lacks unified standard specifications for determining oil content in gases. Specifically, there are no clear regulations regarding the temperature, pressure, and airflow conditions under which carbon tetrachloride can most effectively absorb oil from flue gas. Furthermore, the unique properties of flue gas can affect the detection results of oil content. These special characteristics further increase the complexity and uncertainty of the determination process.

[0004] This invention provides a simulation device for detecting oil content in flue gas, which solves the problems of inconsistent detection standards and unclear detection conditions in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a simulation device for detecting oil content in flue gas, so as to solve the problems of inconsistent detection standards and unclear detection conditions in the existing technology.

[0006] The technical solution of this utility model is: a simulation device for detecting oil content in flue gas, comprising an oily flue gas simulation device, a gas absorption device, a temperature control device, and a tail gas treatment device;

[0007] The gas absorption device contains an absorbent; the gas absorption device is placed inside the temperature control device, and the temperature of the absorbent inside the gas absorption device is adjusted by the temperature control device; an infrared spectrophotometer is installed on the gas absorption device.

[0008] The output end of the oily flue gas simulation device is connected to the gas absorption device through a pipeline, and the pipeline extends to the bottom of the gas absorption device, so that the oily gas flows upward from the bottom of the gas absorption device; the output end of the gas absorption device is connected to the exhaust gas treatment device through a pipeline, and a gas flow meter is installed on the pipeline connecting the gas absorption device and the exhaust gas treatment device.

[0009] Preferably, the oily fume simulation device includes a high-purity nitrogen cylinder and an oil cylinder;

[0010] The output end of the high-purity nitrogen cylinder is connected to the oil bottle through a pipeline, and the pipeline extends from the top of the oil bottle to the bottom inside the oil bottle, so that the nitrogen gas delivered to the oil bottle flows upward from the bottom inside the oil bottle;

[0011] A pressure reducing valve and a flow meter are installed on the pipeline between the high-purity nitrogen cylinder and the oil cylinder; the flow rate and velocity of nitrogen gas delivered to the oil cylinder are controlled by adjusting the opening and closing degree of the pressure reducing valve.

[0012] Preferably, the gas absorption device includes a plurality of gas absorption bottles connected in series; each gas absorption bottle is provided with a top cover that matches the bottle opening; the output end of the oily fume simulation device is connected to one of the gas absorption bottles through a pipeline, and the pipeline passes through the top cover of the gas absorption bottle and extends to the bottom of the gas absorption bottle; a sealing ring is provided on the periphery where the top cover of the gas absorption bottle meets the bottle opening.

[0013] Preferably, a horn-shaped gas distribution device is also provided at the bottom of the gas absorption bottle; the gas distribution device is fixedly connected to a pipeline extending into the gas absorption bottle; and a vent is provided on the gas distribution device.

[0014] The gas absorption bottle is a bubble-type gas absorption bottle.

[0015] Preferably, the temperature control device includes a container, a temperature control device disposed within the container, and a heat transfer element; the gas absorption device is placed inside the container; and the temperature of the heat transfer element is controlled by the temperature control device.

[0016] Preferably, the temperature control device is an ice cube or a dual-function device for both cooling and heating.

[0017] Preferably, the cooling / heating dual-function device includes a heat transfer wire and a controller; the heat transfer wire is disposed inside the container and extends to the outside of the container, and is connected to the controller.

[0018] Preferably, it also includes an absorbent replenishment device; the absorbent replenishment device includes an absorbent solution bottle and a delivery pump;

[0019] The absorbent solution bottle is connected to the input end of the delivery pump via a pipeline; the output end of the delivery pump is connected to the output end of the oily fume simulation device via a pipeline; and a valve is also provided on the output end of the oily fume simulation device.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] (1) The present invention provides a simulation device for detecting oil content in flue gas. This device can accurately reproduce oily gas with the same composition as the waste gas generated in the actual production process through an oily flue gas simulation device, providing a highly simulated gas sample for detection; effectively ensuring the reliability and authenticity of the detection results; absorbing and treating oily gas through a gas absorption device, and at the same time, precisely adjusting the temperature of the absorption environment through a temperature control device, and precisely controlling key parameters such as gas flow rate through components such as pressure reducing valve and flow meter. Through comprehensive control of these conditions, the optimal conditions for absorbent to absorb oil in flue gas can be systematically screened, thereby providing a scientific basis for optimizing the absorption process; solving the problems of inconsistent existing detection standards and unclear detection conditions in the prior art. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the structure of the simulation device for detecting oil content in flue gas according to Embodiment 1 of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the air distribution device described in this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the simulation device for detecting oil content in flue gas according to Embodiment 2 of this utility model;

[0026] The components include: 1. Oily fume simulation device; 11. High-purity nitrogen cylinder; 12. Oil bottle; 13. Pressure reducing valve; 14. Flow meter; 21. Gas absorption bottle; 22. Top cover; 23. Gas distribution device; 24. Vent hole; 25. Sealing ring; 3. Temperature control device; 31. Container; 32. Temperature control device; 33. Heat transfer element; 321. Heat transfer wire; 322. Controller; 4. Infrared spectrophotometer; 5. Gas flow meter; 6. Tail gas treatment device; 71. Absorbent solution bottle; 72. Delivery pump. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments:

[0028] Implementation Method 1

[0029] A simulation device for detecting oil content in flue gas includes an oily flue gas simulation device 1, a gas absorption device connected to the output end of the oily flue gas simulation device 1 via a pipeline, and a tail gas treatment device 6 connected to the output end of the gas absorption device via a pipeline. A gas flow meter 5 is installed on the pipeline connecting the gas absorption device and the tail gas treatment device 6. The gas absorption device contains an absorbent, which is carbon tetrachloride, and is housed in a temperature control device 3, through which the temperature of the absorbent inside the gas absorption device is adjusted. An infrared spectrophotometer 4 is also installed on the gas absorption device for detecting the oil content and composition in the absorbent. To ensure comprehensive and sufficient contact between the absorbent and the oily gas, thereby significantly improving the absorption efficiency of oily components in the gas, a packing layer is also installed inside the gas absorption device; the pipelines are all made of polytetrafluoroethylene; the exhaust gas treatment device 6 contains exhaust gas absorption liquid, which is used to efficiently absorb the absorbent gas mixed in by volatilization and the oil that has not been completely absorbed by the absorbent in the exhaust gas, ensuring that the harmful components in the exhaust gas are not directly emitted into the atmosphere, thereby effectively avoiding pollution to the environment.

[0030] like Figure 1 As shown, the oily flue gas simulation device 1 includes a high-purity nitrogen cylinder 11 and an oil cylinder 12. The output end of the high-purity nitrogen cylinder 11 is connected to the oil cylinder 12 through a pipeline, and the pipeline extends from the top of the oil cylinder 12 to the bottom inside the oil cylinder 12, so that the nitrogen gas delivered to the oil cylinder 12 flows upward from the bottom inside the oil cylinder 12, thereby allowing the nitrogen gas to fully contact the oil contained inside the oil cylinder 12 to form an oily gas. A pressure reducing valve 13 and a flow meter 14 are installed on the pipeline between the high-purity nitrogen cylinder 11 and the oil cylinder 12. The flow rate and velocity of the nitrogen gas delivered to the oil cylinder 12 are controlled by adjusting the opening and closing degree of the pressure reducing valve 13.

[0031] The gas absorption device includes two gas absorption bottles 21 connected in series. Each gas absorption bottle 21 is equipped with a cap 22 that matches the bottle opening. Both gas absorption bottles 21 are bubbling type gas absorption bottles. The output end of the oily fume simulation device 1, i.e., the output end of the oil bottle 12, is connected to one of the gas absorption bottles 21 via a pipe. The pipe passes through the cap 22 of the gas absorption bottle 21 and extends to the bottom of the gas absorption bottle 21. The output end of the upper part of the gas absorption bottle 21 is connected to the other gas absorption bottle 21 via a pipe. The pipe passes through the cap 22 of the other gas absorption bottle 21 and extends to its bottom. The output end of the other gas absorption bottle 21 is connected to the input end of the exhaust gas treatment device 6 via a pipe. The purpose of extending the pipe to the bottom of the gas absorption bottle 21 is to allow the oily gas delivered to the gas absorption bottle 21 to flow upward from the bottom and fully contact the absorbent inside the gas absorption bottle 21 to achieve the expected absorption effect. In other embodiments, the gas absorption device may include only one gas absorption bottle 21, or it may include two or more gas absorption bottles 21 connected in series.

[0032] To further improve the absorption effect, a funnel-shaped gas distribution device 23 is also provided at the bottom of the gas absorption bottle 21. This gas distribution device 23 is fixedly connected to a pipeline extending into the gas absorption bottle 21. The gas distribution device 23 has several vent holes 24. When oil-containing gas is transported to the bottom of the gas absorption bottle 21 through the pipeline, the oil-containing gas passes through these vent holes 24 and is evenly dispersed within the gas absorption bottle 21, forming a more uniform gas distribution. This effectively increases the contact area and reaction opportunity between the oil-containing gas and the absorbent, thus significantly improving the absorption efficiency. This design improves absorption efficiency. Furthermore, the gas distribution device 23 is coaxially aligned with the gas absorption bottle 21, with its diameter slightly smaller than the bottom diameter of the gas absorption bottle 21. This allows the gas distribution device 23 to move up and down along the axial direction inside the gas absorption bottle 21 under manual operation or external force. Simultaneously, a packing layer is positioned at the upper end of the gas distribution device 23. When maintenance operations such as replacement or flushing of the packing layer are required, operators can use external tools or apply direct force to move the gas distribution device 23 upwards along the axial direction of the gas absorption bottle 21. As the gas distribution device 23 rises, the packing layer also rises, allowing for convenient and quick removal for appropriate processing. This design not only improves the efficiency of experimental operations but also ensures the stability and reliability of the gas absorption system during maintenance. In addition, to ensure good sealing of the gas absorption bottle 21 and prevent leakage of volatile absorbent and oily gases, which could cause environmental pollution and harm to operators' health, a sealing ring 25 is installed around the junction of the top cap 22 and the bottle opening of the gas absorption bottle 21.

[0033] The temperature control device 3 includes a container 31, a temperature control device 32 disposed inside the container 31, and a heat transfer element 33. In this embodiment, the temperature control device 32 uses ice cubes, and the heat transfer element 33 uses pure water. The gas absorption device is placed inside the container 31. By adding ice cubes to the pure water, the temperature of the pure water is gradually reduced to 0°C, thereby reducing the temperature of the absorbent in the gas absorption device to close to 0°C.

[0034] Implementation Method 2

[0035] Although the method of adjusting temperature by adding ice cubes provided in Implementation Method 1 can also achieve the effect of temperature control, its temperature control flexibility and accuracy are low, making it difficult to meet diverse experimental or application needs. Furthermore, since the ice cubes will gradually melt, ice cubes need to be added frequently to maintain the required low temperature environment, which undoubtedly increases the cumbersomeness of the operation and reduces the overall work efficiency.

[0036] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the temperature control device 32 is a dual-function device for both cooling and heating, which has a more flexible temperature control capability. Furthermore, this dual-function device includes a heat transfer wire 321 and a controller 322. The heat transfer wire 321 is disposed inside the container 31, and both ends of the heat transfer wire 321 extend to the outside of the container 31 and are connected to the controller 322. The controller 322 can precisely control the working state of the heat transfer wire 321 according to preset temperature parameters, allowing it to switch between cooling and heating modes. When the heat transfer wire 321 is cooling, it absorbs heat from the pure water in the container 31, lowering the water temperature; when the heat transfer wire 321 is heating, it releases heat to the pure water, raising its temperature. In this way, the temperature of the absorbent in the gas absorption device can be indirectly and effectively controlled, providing a more stable and precise temperature control guarantee for in-depth research on the absorbent's ability to absorb oil components in oily gases.

[0037] During the detection process of the oil content detection simulation device in flue gas, the absorbent, as a volatile solvent, will gradually be lost due to evaporation within the gas absorption device. To ensure the accuracy of the detection and the stable operation of the device, the absorbent needs to be replenished in a timely manner. Furthermore, although the pipelines are all made of polytetrafluoroethylene (PTFE), which has certain hydrophobic and oleophobic properties, a small amount of oil and other impurities may still remain in the pipeline between the oily flue gas simulation device 1 and the gas absorption device during the detection process, affecting the accuracy of subsequent detections.

[0038] In this embodiment, the oil content detection simulation device in the flue gas further includes an absorbent replenishment device; the absorbent replenishment device includes an absorbent solution bottle 71 and a delivery pump 72; the absorbent solution bottle 71 is connected to the input end of the delivery pump 72 through a pipeline; the output end of the delivery pump 72 is connected to the output end of the oily flue gas simulation device 1, i.e., the output end of the oil bottle 12, through a pipeline; the absorbent replenishment device can not only replenish absorbent into the gas absorption device, but also clean the pipeline between the oily flue gas simulation device 1 and the gas absorption device. To prevent absorbent from flowing into the oily fume simulation device 1 and to ensure the safety and effectiveness of absorbent replenishment and pipeline cleaning operations, a valve is installed at the output end of the oily fume simulation device 1. When it is necessary to replenish absorbent or to clean the pipeline between the oily fume simulation device 1 and the gas absorption device, first close the valve at the output end of the oily fume simulation device 1, then turn on the delivery pump 72 to allow the absorbent to flow out of the solution bottle and be transported to the gas absorption device along the pipeline connected to the output end of the oily fume simulation device 1.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A simulation device for detecting oil content in flue gas, characterized in that, It includes an oily fume simulation device, a gas absorption device, a temperature control device, and an exhaust gas treatment device; The gas absorption device contains an absorbent; the gas absorption device is placed inside the temperature control device, and the temperature of the absorbent inside the gas absorption device is adjusted by the temperature control device; an infrared spectrophotometer is installed on the gas absorption device. The output end of the oily flue gas simulation device is connected to the gas absorption device through a pipeline, and the pipeline extends to the bottom of the gas absorption device, so that the oily gas flows upward from the bottom of the gas absorption device; the output end of the gas absorption device is connected to the exhaust gas treatment device through a pipeline, and a gas flow meter is installed on the pipeline connecting the gas absorption device and the exhaust gas treatment device.

2. The simulation device for detecting oil content in flue gas according to claim 1, characterized in that: The oil-containing fume simulation device includes a high-purity nitrogen cylinder and an oil cylinder; The output end of the high-purity nitrogen cylinder is connected to the oil bottle through a pipeline, and the pipeline extends from the top of the oil bottle to the bottom inside the oil bottle, so that the nitrogen gas delivered to the oil bottle flows upward from the bottom inside the oil bottle; A pressure reducing valve and a flow meter are installed on the pipeline between the high-purity nitrogen cylinder and the oil cylinder; the flow rate and velocity of nitrogen gas delivered to the oil cylinder are controlled by adjusting the opening and closing degree of the pressure reducing valve.

3. The simulation device for detecting oil content in flue gas according to claim 1, characterized in that: The gas absorption device includes several gas absorption bottles connected in series; each gas absorption bottle is provided with a top cover that matches the bottle opening of the gas absorption bottle. The output end of the oily fume simulation device is connected to one of the gas absorption bottles via a pipeline, and the pipeline passes through the top cover of the gas absorption bottle and extends to the bottom of the gas absorption bottle; A sealing ring is provided around the periphery where the top cover of the gas absorption bottle meets the bottle opening.

4. The simulation device for detecting oil content in flue gas according to claim 3, characterized in that: The bottom of the gas absorption bottle is also provided with a trumpet-shaped gas distribution device; the gas distribution device is fixedly connected to a pipeline extending into the gas absorption bottle; the gas distribution device is provided with a vent hole. The gas absorption bottle is a bubble-type gas absorption bottle.

5. The simulation device for detecting oil content in flue gas according to claim 1, characterized in that: The temperature control device includes a container, a temperature control device installed inside the container, and a heat transfer element; the gas absorption device is placed inside the container; the temperature of the heat transfer element is controlled by the temperature control device.

6. The simulation device for detecting oil content in flue gas according to claim 5, characterized in that: The temperature control device is an ice cube or a dual-function device for both cooling and heating.

7. The simulation device for detecting oil content in flue gas according to claim 6, characterized in that: The dual-function cooling / heating device includes a heat transfer wire and a controller; the heat transfer wire is disposed inside the container and extends to the outside of the container, and is connected to the controller.

8. The simulation device for detecting oil content in flue gas according to claim 1, characterized in that: It also includes an absorbent replenishment device; the absorbent replenishment device includes an absorbent solution bottle and a delivery pump; The absorbent solution bottle is connected to the input end of the delivery pump via a pipeline; the output end of the delivery pump is connected to the output end of the oily fume simulation device via a pipeline; and a valve is also provided on the output end of the oily fume simulation device.

Images