Convenient pressurizing device and pressurizing method for flue gas test of thermodynamic system

Abstract

The invention discloses a convenient pressurization device and pressurization method for a thermodynamic system flue gas test. The convenient pressurization device comprises a flow increasing unit and an intercepting pressurization unit. The flow increasing unit is provided with a pair of backrest pipes, the backrest pipes comprise a windward pipe and a leeward pipe, one end of the windward pipe and one end of the leeward pipe are each provided with an elbow, the flow intercepting and pressurizing unit is provided with an outlet shell and an inlet shell, the outlet shell is connected with the inlet shell, the outlet shell is provided with a return air outlet, and the return air outlet is connected with the inlet shell. The other end of the windward pipe is communicated with an inlet connector on the inlet shell, the other end of the leeward pipe is communicated with an air return outlet, a horn pipe is arranged in the outlet shell, and the horn pipe is communicated with an outlet connector on the outlet shell. According to the invention, the pressurization mode is realized by changing the flowing state of the flue gas through the structure, the method is simple and effective, additional power equipment is not needed, and the working efficiency and the data accuracy of the flue gas analyzer in the flue gas test of the thermodynamic system are greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal systems, and in particular to a convenient pressurizing device and pressurizing method for flue gas testing of thermal systems. Background Art

[0002] In the operation and optimization process of thermal systems, boiler performance testing is a crucial link, which evaluates the operating status, efficiency and potential problems of the boiler by accurately measuring various parameters. In the boiler performance test and other related work of the thermal system, collecting the content of flue gas components is an important task. The accurate determination of the content of flue gas components can provide a key basis for in-depth analysis of the combustion conditions of the boiler. For example, by monitoring the content of gases such as oxygen, carbon monoxide, carbon dioxide, and nitrogen oxides, we can clearly understand whether the combustion is sufficient, whether there is energy waste caused by incomplete combustion, and whether pollutant emissions exceed the standard. This is of immeasurable importance for optimizing the combustion process, improving the thermal efficiency of the boiler, reducing pollutant emissions, and ensuring the stable operation of the entire thermal system.

[0003] However, in actual operation, it is often encountered that the negative pressure in the measuring hole is large. When the negative pressure in the measuring hole is large, the flue gas analyzer is unable to obtain sufficient air intake flow due to insufficient power and insufficient suction force to overcome the large negative pressure in the measuring hole. In order to meet different measurement requirements and on-site conditions, it is often necessary to arrange a longer pipe to connect the flue measuring hole and the flue gas analyzer. However, when the pipe is long, it takes a long time for the analyzer to collect data. Because during the long collection process, the operating status of the boiler may change slightly, or external environmental factors such as temperature and pressure may also have a certain impact on the flue gas components, resulting in the collected data not being able to truly reflect the operating status of the boiler at a specific moment. This not only seriously slows down the progress of the experiment and seriously affects the experimental efficiency, but also greatly affects the accuracy of the data. A method currently commonly used in the industry is to insert a steel pipe into the flue measuring hole and install a booster pump on the pipe. Although it can increase the air intake flow to a certain extent and provide a relatively sufficient flue gas supply for the flue gas analyzer, the large pump itself is large in size, heavy in weight, and inconvenient to carry. It not only takes up a lot of space, but also increases the risk of collision during operation. At the same time, the normal operation of the large pump also requires wiring to an external 220-volt power supply. In complex industrial environments such as boiler rooms, the wiring work becomes extremely difficult, and there are certain safety hazards, which brings great inconvenience to actual use. Summary of the Invention

[0004] The purpose of the present invention is to provide a convenient boosting device and boosting method for flue gas testing in thermal systems, so as to solve the problems in the prior art of low air intake flow and slow data collection caused by large negative pressure in the measuring hole and low power of the analyzer during flue gas testing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A convenient boosting device for flue gas testing in thermal systems, comprising a flow increasing unit and a flow cut-off boosting unit; The flow-increasing unit is provided with a pair of backrest pipes, which include a windward pipe and a leeward pipe. One end of each of the windward pipe and the leeward pipe is equipped with an elbow. The intercepting and boosting unit is provided with an outlet shell and an inlet shell. The outlet shell is connected to the inlet shell. A return air outlet is provided on the outlet shell. The other end of the windward pipe is connected to the inlet interface on the inlet shell, and the other end of the leeward pipe is connected to the return air outlet. A trumpet pipe is provided in the outlet shell, and the trumpet pipe is connected to the outlet interface on the outlet shell.

[0006] Furthermore, the windward pipe and the leeward pipe are fixed in parallel by buckles.

[0007] Furthermore, a trumpet head is installed on the elbow of the windward pipe.

[0008] Furthermore, the outlet housing and the inlet housing are connected via threads, and a sealing gasket is provided between the outlet housing and the inlet housing.

[0009] Furthermore, the diameter of the inlet interface is larger than the diameter of the outlet interface.

[0010] Furthermore, a screw interface is provided in the outlet housing, the screw interface is communicated with the outlet interface, and the trumpet is mounted on the screw interface.

[0011] Furthermore, the outlet housing is connected to a flue gas analyzer via an outlet interface.

[0012] Furthermore, the other end of the windward duct is connected to the inlet interface through a leather hose, and the other end of the leeward duct is connected to the return air outlet through a leather hose.

[0013] Furthermore, the opening of the trumpet tube is arranged opposite to the inlet interface.

[0014] A convenient pressurization method for flue gas testing of a thermal system using the device includes: Insert the backrest pipe of the flow-increasing unit into the flue metering hole, so that the elbow of the windward pipe faces the direction of flue gas flow; The flue gas flows through the windward pipe and enters the interception and boosting unit from the inlet interface. The accelerated flue gas directly impacts the opening of the bell tube. The flow dynamic pressure of the bell tube increases the pressure at the outlet interface, causing the flue gas to flow out quickly from the outlet interface and reach the flue gas analyzer, thereby realizing flue gas testing and data collection. The excess flue gas after the power impact in the interception and boosting unit is discharged from the return air outlet and discharged into the flue along the leeward pipe, completing the entire circulation process.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a convenient boosting device for flue gas testing of thermal systems, by arranging a pair of backrest pipes in the flow-increasing unit, wherein an elbow is installed at one end of the windward pipe and the leeward pipe, the elbow of the windward pipe is directly opposite to the flow direction of the flue gas, and a trumpet head can be installed on the elbow of the windward pipe according to actual conditions, and the Venturi effect is utilized. When the flue gas passes through the trumpet head, the flow velocity increases and the pressure decreases, forming a negative pressure in the tail pipe, effectively increasing the flow of the tail pipe, so that more flue gas can enter the test device, providing sufficient flue gas samples for subsequent tests, reducing the test waiting time caused by insufficient flue gas volume, and improving the overall test efficiency. An outlet shell and an inlet shell connected as a whole are provided in the interception boosting unit, and a return air outlet is opened on the outlet shell. The other end of the leeward pipe is connected to the return air outlet, and the excess flue gas that releases kinetic energy after doing work inside the device is discharged into the leeward pipe, and finally discharged into the flue, so that the flue gas can circulate between the device and the flue, making full use of the energy of the flue gas and reducing the waste of flue gas. Connect the other end of the windward pipe to the inlet interface on the inlet shell, set a trumpet pipe in the outlet shell, and connect the trumpet pipe to the outlet interface on the outlet shell. This allows the flue gas to form a smooth circulation loop in the device, and the flue gas can quickly enter from the inlet interface, flow out from the outlet interface after being pressurized by the trumpet pipe, and quickly reach the vicinity of the flue gas analyzer, reducing the obstruction and residence time of the flue gas during the transmission process, and achieving efficient flue gas testing and data collection. The present invention is not only easy to carry and operate, but also achieves pressurization by changing the flow state of the flue gas through the structure. It is simple and effective and does not require additional power equipment, reducing the operating cost and maintenance difficulty of the device. It avoids problems such as wiring difficulties and unstable power supply, greatly improving the working efficiency and data accuracy of the flue gas analyzer in the flue gas testing of thermal systems, and providing strong support for related research and work on thermal systems.

[0016] Furthermore, the outlet port diameter is smaller than the inlet port diameter. Utilizing the principle of flow dynamic pressure, when flue gas enters the smaller outlet port from the larger inlet port, the flow velocity and pressure increase, achieving a flue gas pressurization effect. Simultaneously, the bell tube absorbs the energy of the flue gas at the inlet port, further increasing the flue gas pressure at the outlet port. This provides a flue gas sample at a stable pressure for the flue gas analyzer, avoiding inaccurate test data due to pressure fluctuations and ensuring the reliability of test results.

[0017] Furthermore, threads and sealing gaskets are installed at the interface between the outlet and inlet housings. The cooperation between the threads and the sealing gasket effectively prevents smoke leakage, ensuring that all smoke entering the device can participate in the test process without affecting the flow rate and composition of the smoke due to leakage. This ensures that the test data can truly reflect the actual situation of the smoke in the flue, thereby improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a convenient booster device for flue gas testing in a thermal system according to the present invention.

[0020] Figure 2 Schematic diagram of the structure of the flow increasing unit of the present invention.

[0021] Figure 3 This is an enlarged view of the head of the flow-increasing unit of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the interception and pressurization unit of the present invention.

[0023] Figure 5 This is an exploded view of the shut-off and pressurizing unit of the present invention.

[0024] Figure 6 It is an enlarged view of the outlet housing of the present invention.

[0025] Among them: 1- windward pipe, 2- leeward pipe, 3- elbow, 4- trumpet head, 5- buckle, 6- inlet shell, 7- outlet shell, 8- trumpet pipe, 9- sealing gasket, 10- inlet interface, 11- outlet interface, 12- return outlet, 13- screw interface, 14- leather hose, 15- flue measuring hole, 16- flue gas analyzer. DETAILED DESCRIPTION

[0026] To facilitate understanding of the features and effects of the present invention by those skilled in the art, the following provides a general description and definition of the terms and expressions used in the specification and claims. Unless otherwise indicated, all technical and scientific terms used herein have the ordinary meanings as understood by those skilled in the art regarding the present invention. In the event of conflict, the definitions in this specification shall prevail.

[0027] The theories or mechanisms described and disclosed herein, whether correct or incorrect, should not limit the scope of the present invention in any way, that is, the present invention can be implemented without being limited by any specific theory or mechanism.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. In addition, it should be understood that after reading the contents taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In this document, for the sake of brevity, not all possible combinations of the various technical features in each embodiment or example are described. Therefore, as long as there are no contradictions in the combination of these technical features, the various technical features in each embodiment or example can be combined in any way, and all possible combinations should be considered to be within the scope of this specification.

[0032] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] The present invention is described in further detail below with reference to the accompanying drawings: See also Figure 1 The present invention provides a convenient boosting device for flue gas testing of a thermal system, comprising a flow increasing unit and a flow cut-off boosting unit, wherein the flow increasing unit is connected to the flow cut-off boosting unit.

[0036] like Figure 2 As shown, the flow-increasing unit includes a pair of backrest pipes, which are formed by two steel pipes tightly fixed in parallel by a buckle 5, thereby ensuring the overall stability of the backrest pipe. The backrest pipe includes a windward pipe 1 and a leeward pipe 2. The tops of the windward pipe 1 and the leeward pipe 2 are both connected with an elbow 3. The elbow 3 on the windward pipe 1 is facing the direction of the flue gas flow, so that the flue gas can flow more smoothly when entering the windward pipe 1, reducing the energy loss caused by the change of direction. In the actual experimental detection process, it is necessary to decide whether to install the trumpet head 4 on the elbow 3 of the windward pipe 1 based on the flow rate in the flue and the specific situation of the flue measuring hole 15, such as Figure 3 As shown. When the flue flow is small or the position of the flue measuring hole 15 is not conducive to the normal entry of flue gas, installing the horn head 4 can significantly increase the flue gas flow rate. When conducting a flue gas test, the horn head 4 is facing the direction of the flue gas flow. According to the Venturi effect, when the flue gas passes through the horn head 4, the flow rate will increase and the pressure will decrease, thereby forming a negative pressure in the tail pipe, effectively increasing the flow and pressure of the tail pipe, and providing more favorable conditions for subsequent flue gas testing. During the experiment, the other ends of the windward pipe 1 and the leeward pipe 2 are respectively connected to the inlet interface 10 and the return air outlet 12 of the interception and boosting unit through the leather tube 14, so that the two leather tubes 14 will form an increased circulation reflux, providing the basic conditions for subsequent flue gas pressurization and flow increase, so that the entire device can operate in a stable state, and improve the accuracy of the flue gas test.

[0037] like Figure 4As shown, the interception and boosting unit includes an inlet shell 6 and an outlet shell 7. The interface between the outlet shell 7 and the inlet shell 6 is provided with threads, and a sealing gasket 9 is installed in the middle of the interface. Through the cooperation of the threads at the interface and the sealing gasket 9, the outlet shell 7 and the inlet shell 6 and the sealing gasket 9 in the middle constitute the overall appearance of the device, wherein the sealing gasket 9 in the middle plays a role in preventing smoke leakage. Combining the two into a cylindrical integral device not only ensures the sealing of the device and prevents smoke leakage from affecting the test results, but also makes the overall structure of the device compact and easy to install and use. A smoke inlet interface 10 is provided at one end of the inlet shell 6, and the other end of the windward pipe 1 is connected to the inlet interface 10 on the inlet shell 6 through a leather tube 14. The inlet interface 10 extends inward for a certain distance to ensure that the smoke can smoothly enter the inlet shell 6, reducing the smoke backflow or leakage caused by insufficient length of the inlet interface 10. As shown Figure 5 As shown, a bell tube 8 is provided in the outlet shell 7, and the opening of the bell tube 8 is arranged opposite to the inlet interface 10. When the flue gas enters from the inlet interface 10 on the inlet shell 6, the bell tube 8 can effectively absorb the energy of the incoming increased flow flue gas. Due to the special shape of the bell tube 8, the flow velocity of the flue gas will change after entering the bell tube 8, thereby effectively increasing the flue gas pressure at the outlet interface 11. An outlet interface 11 is provided at one end of the outlet shell 7, and the diameter of the inlet interface 10 is larger than the diameter of the outlet interface 11, which can make full use of the flow dynamic pressure to increase the pressure at the outlet interface 11. When the flue gas enters the outlet interface 11 with a smaller diameter from the inlet interface 10 with a larger diameter, according to the principles of fluid mechanics, the flow velocity of the flue gas will increase, and the pressure will also increase accordingly, thereby achieving a pressurization effect on the flue gas. As shown Figure 6As shown, the outlet interface 11 is internally connected to a raised screw interface 13 for connecting the bell tube 8, thereby connecting the bell tube 8 to the outlet interface 11 on the outlet housing 7. This not only ensures the seal between the bell tube 8 and the outlet housing 7, but also facilitates the installation and removal of the bell tube 8, making it convenient to operate in the event of a device failure or maintenance. The outlet housing 7 is connected to the flue gas analyzer 16 through the outlet interface 11, allowing the flue gas that has undergone pressurization and flow increase to quickly reach the interception device near the flue gas analyzer. This ensures that the flue gas has an appropriate flow rate and pressure before entering the flue gas analyzer, thereby achieving efficient flue gas testing and data collection, and improving the efficiency and accuracy of the testing work. A return air outlet 12 is also provided on the belly of the outlet housing 7, connected to the other end of the leeward duct 2 via a leather tube 14. After the flue gas is pressurized and increased in flow within the device, some excess flue gas releases kinetic energy. This excess flue gas is discharged through the return air outlet 12, flowing along the leather tube 14 to the leeward duct 2 of the flue back duct, and ultimately into the flue, ensuring a smooth circulation process. This ensures the stable flow of flue gas within the device, prevents excess flue gas from accumulating inside the device and affecting test results, and also enables the recycling of flue gas, improving resource utilization efficiency.

[0038] The present invention also provides a pressurizing method of a convenient pressurizing device for flue gas testing of a thermal system, comprising: First, insert the two backrest pipes of the flow-increasing unit into the flue metering hole 15. Based on the actual flow rate in the flue and the size of the metering hole, select and install a trumpet head 4 at one end of the windward pipe 1, ensuring that the trumpet head 4 of the windward pipe 1 faces the direction of the flue gas flow. Then, connect the two leather hoses 14 to the other ends of the windward pipe 1 and the leeward pipe 2, respectively, ensuring a secure connection.

[0039] Connect the inlet housing 6 of the intercepting and boosting unit to the leeward duct 2 of the flow-increasing unit. The flue gas flows through the windward duct 1 and enters the intercepting and boosting unit from the inlet interface 10 with a larger diameter. The accelerated flue gas directly impacts the opening of the bell tube 8. Since the tail of the bell tube 8 is thinner, the flow dynamic pressure can be fully utilized to increase the pressure at the outlet interface 11, allowing the flue gas to flow out quickly from the outlet interface 11. Connect the outlet interface 11 of the intercepting and boosting unit to the flue gas analyzer 16 so that the flue gas after the boosting and flow-increasing treatment can quickly reach the vicinity of the flue gas analyzer 16, thereby achieving efficient flue gas testing and data collection.

[0040] Excess flue gas from the interception and boosting unit, after undergoing the power impact, is discharged from the return air outlet 12 on the underside of the outlet housing 7. It then flows through the leather hose 14 into the leeward duct 2 and into the flue, completing the entire circulation process. This effectively solves the problem of the flue gas analyzer 16 reacting slowly due to excessive flue negative pressure and excessively long pipes, requiring the installation of a high-powered vacuum pump.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A convenient booster device for flue gas testing in thermal systems, characterized in that: It includes a flow increasing unit and a flow intercepting and pressurizing unit; The flow-increasing unit is provided with a pair of backrest pipes, which include a windward pipe and a leeward pipe. One end of each of the windward pipe and the leeward pipe is equipped with an elbow. The intercepting and boosting unit is provided with an outlet shell and an inlet shell. The outlet shell is connected to the inlet shell. A return air outlet is provided on the outlet shell. The other end of the windward pipe is connected to the inlet interface on the inlet shell, and the other end of the leeward pipe is connected to the return air outlet. A trumpet pipe is provided in the outlet shell, and the trumpet pipe is connected to the outlet interface on the outlet shell.

2. A convenient booster device for flue gas testing of thermal systems according to claim 1, characterized in that: The windward pipe and the leeward pipe are fixed in parallel by buckles.

3. A convenient booster device for flue gas testing of thermal systems according to claim 1, characterized in that: A trumpet head is installed on the elbow of the windward pipe.

4. A convenient booster device for flue gas testing of thermal systems according to claim 1, characterized in that: The outlet housing and the inlet housing are connected via threads, and a sealing gasket is provided between the outlet housing and the inlet housing.

5. The convenient boosting device for flue gas testing of thermal systems according to claim 1, characterized in that: The diameter of the inlet interface is larger than the diameter of the outlet interface.

6. A convenient booster device for flue gas testing of thermal systems according to claim 1, characterized in that: A screw interface is provided in the outlet housing, the screw interface is communicated with the outlet interface, and the trumpet is mounted on the screw interface.

7. The convenient boosting device for flue gas testing of thermal systems according to claim 1, characterized in that: The outlet housing is connected to the flue gas analyzer through an outlet interface.

8. The convenient boosting device for flue gas testing of thermal systems according to claim 1, characterized in that: The other end of the windward pipe is communicated with the inlet interface through a leather hose, and the other end of the leeward pipe is communicated with the return air outlet through a leather hose.

9. The convenient boosting device for flue gas testing of thermal systems according to claim 1, characterized in that: The opening of the trumpet tube is arranged opposite to the inlet interface.

10. A convenient pressurization method for flue gas testing in a thermal system using the device according to any one of claims 1 to 9, characterized in that: include: Insert the backrest pipe of the flow-increasing unit into the flue metering hole, so that the elbow of the windward pipe faces the direction of flue gas flow; The flue gas flows through the windward pipe and enters the interception and boosting unit from the inlet interface. The accelerated flue gas directly impacts the opening of the bell tube. The flow dynamic pressure of the bell tube increases the pressure at the outlet interface, causing the flue gas to flow out quickly from the outlet interface and reach the flue gas analyzer, thereby realizing flue gas testing and data collection. The excess flue gas after the power impact in the interception and boosting unit is discharged from the return air outlet and discharged into the flue along the leeward pipe, completing the entire circulation process.

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