Online flue gas sampling device for heating furnace

Abstract

The utility model relates to the technical field of online flue gas sampling of heating furnaces, in particular to an online flue gas sampling device of a heating furnace. Comprising a sampling pipe, a lifting device, a translation device, a walking device, a cooling device and a flue gas storage container, the lifting device is installed on the walking device, the translation device is installed on the lifting device, the sampling pipe is fixedly connected to the translation device, the walking device drives the whole device to move, the lifting device drives the sampling pipe to ascend and descend, and the translation device drives the sampling pipe to move front and back; the sampling pipe is composed of an inner pipe and an outer pipe which are not communicated, the inner pipe is communicated with the flue gas storage container through a first connecting pipe, and a flow valve and a suction pump are arranged on the first connecting pipe; the cooling device comprises a cooling gas container and a circulating pump, the cooling gas container is communicated with the outer pipe through a second connecting pipe, and the circulating pump is installed on the second connecting pipe. The smoke sampling device has a cooling function and a smoke sampling rate adjusting function, and is convenient to move.

Description

Technical Field

[0001] This utility model relates to the field of online flue gas sampling technology for heating furnaces, specifically to an online flue gas sampling device for heating furnaces. Background Technology

[0002] Online flue gas sampling for heating furnaces is an important means of monitoring and optimizing key parameters such as furnace operation status, combustion efficiency, and environmental emissions through real-time monitoring and analysis of flue gas composition. Flue gas analysis refers to the quantitative analysis of the volumetric proportions of gaseous components in flue gas. Flue gas analysis requires the analysis and detection of O2, CO, CO2, NO, NO2, and NO2. x SO2, C X H Y It can detect smoke and dust, exhaust temperature, flue pressure, combustion efficiency, and excess air coefficient, etc. With the addition of sensors, it can detect flue gas components such as H2S, H2, HCl, and CO.

[0003] However, current flue gas collection and sampling devices lack cyclic cooling capabilities. Flue gas temperatures typically range from 100 to 500°C (or even higher), while the operating temperature of analytical instruments (such as gas sensors and chromatographs) generally needs to be controlled below 40°C. High temperatures can directly damage precision components or lead to measurement errors. Uncooled flue gas may continue to undergo oxidation and decomposition reactions (such as NO2 decomposing into NO) in the sampling pipeline, altering its original composition and causing measurement results to deviate from the true value. Furthermore, they lack the ability to adjust the flue gas sampling rate and are inconvenient to move. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an online flue gas sampling device for a heating furnace, which has a cooling function, an adjustable flue gas sampling rate, and is easy to move.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An online flue gas sampling device for a heating furnace includes a sampling tube, a lifting device, a translation device, a traveling device, a cooling device, and a flue gas storage container. The lifting device is mounted on the traveling device, the translation device is mounted on the lifting device, and the sampling tube is fixed to the translation device. The traveling device drives the entire device to move, the lifting device drives the sampling tube to move up and down, and the translation device drives the sampling tube to move back and forth. The sampling tube consists of an inner tube and an outer tube that are not connected. The inner tube is connected to the flue gas storage container through a first connecting pipe, and the first connecting pipe is equipped with a flow valve and a suction pump. The cooling device includes a cooling gas container and a circulation pump. The cooling gas container is connected to the outer tube through a second connecting pipe, and the circulation pump is mounted on the second connecting pipe.

[0007] Furthermore, the walking device includes wheels and a base plate, the base plate being a rectangular flat plate, with four wheels installed at the four corners of the bottom of the base plate.

[0008] Furthermore, the lifting device includes two parallel hydraulic cylinders, which are vertically arranged. The cylinder seats of the hydraulic cylinders are fixed to the top surface of the base plate, and the cylinder rods of the hydraulic cylinders are connected to the translation device.

[0009] Furthermore, the translation device includes a lifting plate, a slider, a slide groove, a lead screw, a lead screw nut, and a motor; the lifting plate is fixed to the top of the cylinder rod of the hydraulic cylinder, the lifting plate is provided with a slide groove, and the slider is installed in the slide groove; the lead screw nut is fixed to the slider, the sampling tube is fixed to the lead screw nut, the lead screw nut is threadedly connected to the lead screw, and the lead screw is connected to the motor; the motor drives the lead screw to rotate, thereby driving the slider, the lead screw nut, and the sampling tube to move back and forth along the slide groove.

[0010] Furthermore, the cooling gas container is a liquid nitrogen tank.

[0011] Furthermore, the outer tube has multiple heat exchange holes evenly distributed on its wall.

[0012] Furthermore, it also includes heat-conducting fins, with multiple heat-conducting fins evenly distributed circumferentially between the inner tube and the outer tube. One end of the heat-conducting fin is connected to the inner tube, and the other end is connected to the outer tube.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model features a sampling tube with a sleeve structure, consisting of a non-connected inner tube and an outer tube. The inner tube is connected to a flue gas storage container via a first connecting pipe, and a suction pump draws the flue gas into the storage container. A flow valve is installed on the first connecting pipe to adjust the flue gas sampling rate. This utility model introduces cooling gas into the outer tube to cool the flue gas in the inner tube, thereby protecting the equipment, ensuring data accuracy, guaranteeing safety, and ensuring the flue gas meets measurement standards. Furthermore, this utility model includes a walking device, making the entire device easy to move.

[0015] 2. This utility model achieves lifting and lowering through a hydraulic cylinder, resulting in smooth movement and precise control.

[0016] 3. This utility model achieves forward and backward movement through a lead screw and a lead nut. The core advantages of the lead screw and lead nut transmission can be summarized as "precision, self-locking, compactness, and durability", making it especially suitable for scenarios with high requirements for positioning accuracy and reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a side sectional view of the sampling tube of this utility model.

[0019] Figure 3 This is a front sectional view of the sampling tube of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the sampling tube of this utility model.

[0021] In the diagram: 1. Sampling tube; 2. Lead screw; 3. Nut; 4. Lifting plate; 5. Motor; 6. Circulating pump; 7. Flow valve; 8. Suction pump; 9. Storage tank; 10. Base plate; 11. Wheels; 12. Liquid nitrogen tank; 13. Hydraulic cylinder; 14. Slider; 15. Slide groove; 16. Heat-conducting fins; 17. Heat exchange hole; 18. Outer tube; 19. Inner tube. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0028] like Figure 1-4 As shown, an online flue gas sampling device for a heating furnace includes a sampling tube 1, a lifting device, a translation device, a walking device, a cooling device, and a flue gas storage tank 9.

[0029] The walking device includes wheels 11 and a base plate 10. The base plate 10 is a rectangular flat plate, and four wheels 11 are installed at the four corners of the bottom of the base plate 10. The device is easy to move as a whole.

[0030] The lifting device includes two parallel hydraulic cylinders 13, which are vertically arranged. The cylinder seats of the hydraulic cylinders are fixed to the upper surface (top surface) of the base plate 10, and the top of the cylinder rods are fixed to the lower surface of the lifting plate 4. This invention achieves lifting through the hydraulic cylinders 13, resulting in smooth movement and precise control.

[0031] The translation device includes a lifting plate 4, a slider 14, a slide groove 15, a lead screw 2, a lead nut 3, and a motor 5. The lifting plate 4 is fixed to the top of the cylinder rod of the hydraulic cylinder. The lifting plate 4 has a slide groove 15, and the slider 14 is installed in the slide groove 15 and can move along the slide groove 15. The lead nut 3 is fixed to the top of the slider 14, and the sampling tube 1 is fixed to the lead nut 3. The lead nut 3 is threadedly connected to the lead screw 2, and the lead screw 2 is connected to the motor 5. The motor 5 drives the lead screw 2 to rotate, and the rotation of the lead screw 2 drives the lead nut 3 to move along the lead screw 2. At the same time, the slider 14 moves along the slide groove 15, thereby driving the sampling tube 1 to move back and forth.

[0032] This utility model achieves forward and backward movement through lead screw 2 and lead screw nut 3. The core advantages of the transmission between lead screw 2 and lead screw nut 3 can be summarized as "precision, self-locking, compact and durable", which is especially suitable for scenarios with high requirements for positioning accuracy and reliability.

[0033] The sampling tube 1 has a sheath structure, consisting of an inner tube 19 and an outer tube 18 that are not connected. The inner tube 19 and the outer tube 18 have the same axis. In this embodiment, the outer tube 18 has 24 heat exchange holes 17 evenly distributed on its wall. It also includes heat-conducting fins 16. In this embodiment, 12 heat-conducting fins 16 are arranged radially and evenly distributed circumferentially between the inner tube 19 and the outer tube 18. One end of the heat-conducting fin 16 is connected to the inner tube 19, and the other end is connected to the outer tube 18.

[0034] The inner pipe 19 is connected to the flue gas storage tank 9 through the first connecting pipe, and the first connecting pipe is equipped with a flow valve 7 and a suction pump 8.

[0035] In this embodiment of the invention, nitrogen is preferred as the cooling gas. The cooling device includes a liquid nitrogen tank 12 and a circulation pump 6. The liquid nitrogen tank 12 is connected to the outer pipe 19 through a second connecting pipe, and the circulation pump 6 is installed on the second connecting pipe.

[0036] The working principle and process of this utility model are as follows:

[0037] When in use, the device is pushed to the sampling position using the running wheels 11.

[0038] Start the hydraulic cylinder 13 to adjust the height of the sampling tube 1. Start the motor 5 to rotate the lead screw 2, which in turn causes the nut 3 to slide to one side on the surface of the slide groove 15 via the slider 14, thereby causing the sampling tube 1 to extend.

[0039] Start the suction pump 8, and draw in the flue gas into the sampling pipe 1 through the suction pump 8. The flow rate is controlled by the flow valve 7.

[0040] Start the circulation pump 6. The circulation pump 6 extracts the cold air from the liquid nitrogen tank 12 and sends it into the heat exchange hole 17 of the outer tube 19 for cooling.

[0041] This invention cools and lowers the temperature of flue gas using cooling gas, thereby protecting the equipment, ensuring data accuracy, guaranteeing safety, and ensuring the flue gas meets measurement standards. A flow valve 7 is installed on the first connecting pipe to adjust the flue gas sampling rate. This invention also includes a walking device for easy movement of the entire device.

[0042] The above description is only a part of the specific embodiments of this utility model. The protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and utility model concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. An online flue gas sampling device for a heating furnace, characterized in that: It includes sampling tubes, lifting devices, translation devices, walking devices, cooling devices, and flue gas storage containers; The lifting device is mounted on the walking device, the translation device is mounted on the lifting device, and the sampling tube is fixed to the translation device. The walking device drives the entire device to move, the lifting device drives the sampling tube to move up and down, and the translation device drives the sampling tube to move back and forth. The sampling tube consists of an inner tube and an outer tube that are not connected. The inner tube is connected to the flue gas storage container through a first connecting tube. The first connecting tube is equipped with a flow valve and a suction pump. The cooling device includes a cooling gas container and a circulation pump. The cooling gas container is connected to an external pipe through a second connecting pipe, and the circulation pump is installed on the second connecting pipe.

2. The online flue gas sampling device for a heating furnace according to claim 1, characterized in that: The walking device includes wheels and a base plate. The base plate is a rectangular flat plate, and four wheels are installed at the four corners of the bottom of the base plate.

3. The online flue gas sampling device for a heating furnace according to claim 2, characterized in that: The lifting device includes two parallel hydraulic cylinders, which are vertically arranged. The cylinder seats of the hydraulic cylinders are fixed to the top surface of the base plate, and the cylinder rods of the hydraulic cylinders are connected to the translation device.

4. The online flue gas sampling device for a heating furnace according to claim 3, characterized in that: The translation device includes a lifting plate, a slider, a slide groove, a lead screw, a lead screw nut, and a motor. The lifting plate is fixed to the top of the cylinder rod of the hydraulic cylinder. The lifting plate is provided with a slide groove, and the slider is installed in the slide groove. The lead screw nut is fixed to the slider, and the sampling tube is fixed to the lead screw nut. The lead screw nut is threadedly connected to the lead screw, and the lead screw is connected to the motor. The motor drives the lead screw to rotate, which in turn drives the slider, the lead screw nut, and the sampling tube to move back and forth along the slide groove.

5. The online flue gas sampling device for a heating furnace according to claim 1, characterized in that: The cooling gas container is a liquid nitrogen tank.

6. The online flue gas sampling device for a heating furnace according to claim 1, characterized in that: The outer tube has multiple heat exchange holes evenly distributed on its wall.

7. The online flue gas sampling device for a heating furnace according to claim 1, characterized in that: It also includes heat-conducting fins, with multiple heat-conducting fins evenly distributed circumferentially between the inner tube and the outer tube. One end of the heat-conducting fin is connected to the inner tube, and the other end is connected to the outer tube.

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