CEMS instrument self-calibration three-way electromagnetic valve and self-calibration system
By adopting a three-way connector design combining a normally open and a normally closed solenoid valve in the CEMS instrument, the problem of gasket damage caused by inconsistent temperature of the solenoid valve was solved, the authenticity of data measurement was improved, the accuracy of denitrification and environmental protection data was ensured, the amount of ammonia injected was reduced, equipment blockage and efficiency reduction were avoided, and the economic benefits of thermal power plants were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-06
AI Technical Summary
The gaskets of the three-way solenoid valves in the CEMS instrument are frequently damaged due to the temperature difference between flue gas and air, preventing them from closing properly. This causes oxygen to be drawn into the measuring instrument, resulting in high NOx data, which affects the accuracy of the denitrification flue gas data. It also increases the amount of ammonia injected, leading to air preheater blockage, reduced electrostatic precipitator efficiency, and increased ammonia escape, thus impacting the economic benefits of thermal power plants.
The three-way connector design, which combines a normally open and a normally closed solenoid valve, avoids gasket damage caused by inconsistent flue gas and air temperatures, ensures that the solenoid valve can close normally, prevents oxygen from being drawn into the instrument, and improves the accuracy of data measurement.
This ensures the accuracy of CEMS instrument data measurements, reduces ammonia injection volume, avoids air preheater blockage, reduces electrostatic precipitator efficiency, reduces ammonia escape, and improves the economic benefits of thermal power plants.
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Figure CN223975875U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of CEMS instrument self-calibration technology, and in particular to a CEMS instrument self-calibration three-way solenoid valve and self-calibration system. Background Technology
[0002] The self-calibration three-way solenoid valve of the denitrification flue gas CEMS instrument is a single-unit three-way solenoid valve. When the CEMS instrument is sampling normally, the normally open end of the three-way solenoid valve is de-energized and opens to measure the flue gas, while the normally closed end of the three-way solenoid valve is closed. When the CEMS instrument is performing self-calibration, the normally open end of the three-way solenoid valve is energized and closes, while the normally closed end of the three-way solenoid valve opens to allow the CEMS instrument to evacuate air for calibration. However, the gasket of this three-way solenoid valve is extremely susceptible to internal damage due to the temperature difference between the flue gas (the flue gas temperature is maintained at around 120℃ for a long time) and the air. Frequent damage to the gaskets causes the normally closed side of the three-way solenoid valve to fail, drawing oxygen from the air into the measuring instruments. This increases the oxygen content in the flue gas measured by the CEMS instrument, leading to higher NOx readings. Operators cannot accurately determine the accuracy of the denitrification flue gas data. Higher NOx readings prompt operators to increase ammonia injection to lower environmental data. However, excessive ammonia injection can clog the air preheater, reduce electrostatic precipitator efficiency, and increase ammonia escape, placing a burden on the unit equipment. Furthermore, excessive ammonia injection directly impacts the economic benefits of the thermal power plant. Utility Model Content
[0003] This application provides a CEMS instrument self-calibration three-way solenoid valve and self-calibration system to improve the accuracy of CEMS data measurement.
[0004] In a first aspect, a CEMS instrument self-calibration three-way solenoid valve is provided, comprising: a three-way connector, wherein the three-way connector includes a first inlet end, a second inlet end, and an outlet end, wherein...
[0005] The first air inlet is connected to the first pipeline, and the first pipeline is equipped with a first solenoid valve.
[0006] The second air inlet is connected to the second pipeline, and the second pipeline is equipped with a second solenoid valve;
[0007] The air outlet is connected to the third pipeline.
[0008] In the above technical solution, a three-way connector is provided, comprising a first inlet end, a second inlet end, and an outlet end. The first inlet end is connected to a first pipeline, on which a first solenoid valve is installed; the second inlet end is connected to a second pipeline, on which a second solenoid valve is installed; and the outlet end is connected to a third pipeline. This avoids the phenomenon where oxygen from the air is drawn into the instrument due to the solenoid valve's inability to close tightly, resulting in an excessively high oxygen content. This improves the accuracy of CEMS data measurement, ensures that operators can better control the ammonia injection rate, and reduces the ammonia injection rate due to accurate denitrification and environmental protection data. This effectively avoids air preheater blockage, reduced electrostatic precipitator efficiency, and reduced ammonia escape. The reduced ammonia injection rate can improve the economic efficiency of thermal power plants.
[0009] In one specific implementation, the first solenoid valve is a normally open solenoid valve.
[0010] In one specific implementation, the second solenoid valve is a normally closed solenoid valve.
[0011] In one specific implementation scheme, a measuring gas inlet is provided on the first pipeline, and the measuring gas inlet is connected to the first solenoid valve.
[0012] In one possible implementation, an air inlet is provided on the second pipeline, and the air inlet is connected to the second solenoid valve.
[0013] In one specific implementation scheme, an air outlet is provided on the third pipeline.
[0014] In one specific implementation scheme, the first conduit is a PVE conduit.
[0015] In one specific implementation scheme, the second conduit is a PVE conduit.
[0016] In one specific implementation, the third conduit is a PVE conduit.
[0017] Secondly, a CEMS instrument self-calibration system is provided, including any of the CEMS instrument self-calibration three-way solenoid valves described in any one of the claims.
[0018] In the above technical solution, a three-way connector is provided, comprising a first inlet end, a second inlet end, and an outlet end. The first inlet end is connected to a first pipeline, on which a first solenoid valve is installed; the second inlet end is connected to a second pipeline, on which a second solenoid valve is installed; and the outlet end is connected to a third pipeline. This avoids the phenomenon where oxygen from the air is drawn into the instrument due to the solenoid valve's inability to close tightly, resulting in an excessively high oxygen content. This improves the accuracy of CEMS data measurement, ensures that operators can better control the ammonia injection rate, and reduces the ammonia injection rate due to accurate denitrification and environmental protection data. This effectively avoids air preheater blockage, reduced electrostatic precipitator efficiency, and reduced ammonia escape. The reduced ammonia injection rate can improve the economic efficiency of thermal power plants. Attached Figure Description
[0019] Figure 1 A schematic diagram of the structure of the CEMS instrument self-calibration three-way solenoid valve provided in the embodiments of this application.
[0020] Among them, 1-T-connector, 2-first air inlet, 3-second air inlet, 4-air outlet, 5-first pipeline, 6-first solenoid valve, 7-second pipeline, 8-second solenoid valve, 9-third pipeline, 10-measuring gas inlet, 11-air inlet, 12-air outlet. Detailed Implementation
[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.
[0022] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.
[0023] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0024] To facilitate understanding of the CEMS instrument self-calibration three-way solenoid valve and self-calibration system provided in this application embodiment, its application scenario is first explained. The CEMS instrument self-calibration three-way solenoid valve and self-calibration system provided in this application embodiment are used for battery heat dissipation and are applied in battery packs or battery modules. The denitrification flue gas CEMS instrument self-calibration three-way solenoid valve is a single three-way solenoid valve. When the CEMS instrument is sampling normally, the normally open end of the three-way solenoid valve is de-energized and opens to measure the flue gas, while the normally closed end of the three-way solenoid valve is closed at this time. When the CEMS instrument is performing self-calibration, the normally open end of the three-way solenoid valve is energized and closes, while the normally closed end of the three-way solenoid valve opens to allow the CEMS instrument to evacuate air for instrument calibration. However, the gasket of this three-way solenoid valve is extremely susceptible to the temperature difference between the flue gas (the flue gas temperature is maintained at around 120°C for a long time) and the air, causing internal damage to the solenoid valve. Frequent damage to the gaskets causes the normally closed side of the three-way solenoid valve to fail, drawing oxygen from the air into the measuring instrument. This increases the oxygen content in the flue gas measured by the CEMS instrument, leading to higher NOx readings. Operators cannot accurately assess the accuracy of the denitrification flue gas data. Higher NOx readings prompt operators to increase ammonia injection, thus lowering environmental data. However, excessive ammonia injection can clog the air preheater, reduce electrostatic precipitator efficiency, and increase ammonia escape, placing a burden on the unit equipment. Furthermore, excessive ammonia injection directly impacts the economic benefits of the thermal power plant. Therefore, this application provides a CEMS instrument self-calibration three-way solenoid valve and self-calibration system to improve reliability during battery cooling. The following detailed description, in conjunction with specific accompanying drawings, illustrates this embodiment.
[0025] refer to Figure 1 , Figure 1 A reference diagram showing the usage status of the CEMS instrument self-calibration three-way solenoid valve provided in an embodiment of this application is shown.
[0026] exist Figure 1 In this application, an embodiment provides a CEMS instrument self-calibration three-way solenoid valve, comprising: a three-way connector 1, wherein the three-way connector includes a first air inlet end 2, a second air inlet end 3, and an air outlet end 4, wherein...
[0027] The first air inlet is connected to the first pipeline 5, and the first pipeline is equipped with a first solenoid valve 6.
[0028] The second air inlet is connected to the second pipeline 7, and the second pipeline is equipped with a second solenoid valve 8;
[0029] The air outlet is connected to the third pipeline 9.
[0030] In the above technical solution, a three-way connector is provided, comprising a first inlet end, a second inlet end, and an outlet end. The first inlet end is connected to a first pipeline, on which a first solenoid valve is installed; the second inlet end is connected to a second pipeline, on which a second solenoid valve is installed; and the outlet end is connected to a third pipeline. This avoids the phenomenon where oxygen from the air is drawn into the instrument due to the solenoid valve's inability to close tightly, resulting in an excessively high oxygen content. This improves the accuracy of CEMS data measurement, ensures that operators can better control the ammonia injection rate, and reduces the ammonia injection rate due to accurate denitrification and environmental protection data. This effectively avoids air preheater blockage, reduced electrostatic precipitator efficiency, and reduced ammonia escape. The reduced ammonia injection rate can improve the economic efficiency of thermal power plants.
[0031] In one specific implementation, the first solenoid valve is a normally open solenoid valve.
[0032] In one specific implementation, the second solenoid valve is a normally closed solenoid valve.
[0033] In one specific implementation scheme, a measuring gas inlet 10 is provided on the first pipeline, and the measuring gas inlet is connected to the first solenoid valve.
[0034] In one specific implementation scheme, an air inlet 11 is provided on the second pipeline, and the air inlet is connected to the second solenoid valve.
[0035] In one specific implementation scheme, an air outlet 12 is provided on the third pipeline.
[0036] In one specific implementation scheme, the first conduit is a PVE conduit.
[0037] In one specific implementation scheme, the second conduit is a PVE conduit.
[0038] In one specific implementation, the third conduit is a PVE conduit.
[0039] Specifically, the CEMS instrument self-calibration three-way solenoid valve is composed of two solenoid valves, one normally open and one normally closed, combined with a three-way connector. The bottom of the CEMS instrument self-calibration three-way solenoid valve is made of polytetrafluoroethylene material resistant to flue gas corrosion. This solenoid valve has the advantages of anti-clogging, anti-gasket damage, corrosion resistance, and high reliability.
[0040] The self-calibrating three-way solenoid valve commonly used in denitrification flue gas CEMS instruments is a single-unit three-way solenoid valve. The gasket of this three-way solenoid valve is very susceptible to damage due to the temperature difference between flue gas and air, which causes frequent damage to the internal rubber gasket of the solenoid valve.
[0041] The single-unit three-way solenoid valve is designed as a combination of two solenoid valves: one normally open and one normally closed. When the CEMS instrument is sampling normally, the normally open solenoid valve opens, and the sample passes through the three-way connector to the CEMS measuring instrument. At this time, the other normally closed solenoid valve closes. When the instrument is performing self-calibration and sampling normally, the normally open solenoid valve closes, while the other normally closed solenoid valve opens for CEMS instrument self-calibration. This combination avoids gasket damage caused by inconsistencies between flue gas temperature and air temperature, improves the accuracy of CEMS data measurements, and allows operators to better control the ammonia injection rate. Accurate data can reduce the ammonia injection rate, effectively preventing air preheater blockage, reducing electrostatic precipitator efficiency, and minimizing ammonia escape. Reduced ammonia injection improves the economic efficiency of thermal power plants.
[0042] When the three-way solenoid valve is performing normal sampling, the normally open solenoid valve is de-energized and remains open to measure flue gas data. At this time, the flue gas flow direction is from the measuring gas inlet to the outlet, while the air inlet cannot flow towards the outlet. When the instrument is performing self-calibration, the normally open solenoid valve is energized and closes, while the normally closed solenoid valve is energized and opens. After the normally closed solenoid valve opens, the measuring instrument draws air for calibration. At this time, the air flow direction is from the air inlet to the outlet. After calibration, the normally closed solenoid valve is de-energized and closes, while the normally open solenoid valve is de-energized and opens to measure flue gas.
[0043] Among the above technical solutions, the modification of the CEMS instrument self-calibration three-way solenoid valve is simple, cost-effective, and avoids the phenomenon of high oxygen levels in the instrument due to gasket damage after automatic calibration of a single three-way solenoid valve. It is easy to implement. It also avoids the phenomenon of oxygen being drawn into the instrument due to the solenoid valve not being able to close tightly, thus improving the accuracy of CEMS data measurement. This ensures that operators can better control the amount of ammonia injected. Accurate denitrification and environmental protection data can reduce the amount of ammonia injected, effectively avoiding air preheater blockage, reduced electrostatic precipitator efficiency, and ammonia escape. The reduction in ammonia injection can improve the economic efficiency of thermal power plants.
[0044] This application also provides a CEMS instrument self-calibration system, including any of the CEMS instrument self-calibration three-way solenoid valves described in any one of the claims.
[0045] In the above technical solution, a three-way connector is provided, comprising a first inlet end, a second inlet end, and an outlet end. The first inlet end is connected to a first pipeline, on which a first solenoid valve is installed; the second inlet end is connected to a second pipeline, on which a second solenoid valve is installed; and the outlet end is connected to a third pipeline. This avoids the phenomenon where oxygen from the air is drawn into the instrument due to the solenoid valve's inability to close tightly, resulting in an excessively high oxygen content. This improves the accuracy of CEMS data measurement, ensures that operators can better control the ammonia injection rate, and reduces the ammonia injection rate due to accurate denitrification and environmental protection data. This effectively avoids air preheater blockage, reduced electrostatic precipitator efficiency, and reduced ammonia escape. The reduced ammonia injection rate can improve the economic efficiency of thermal power plants.
[0046] Those skilled in the art will know that this application can be implemented as a system, method, or computer program product.
[0047] Therefore, this disclosure can be implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this application can also be implemented as a computer program product in one or more computer-readable media, the computer-readable media containing computer-readable program code.
[0048] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.
[0049] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application. Based on this, various substitutions and improvements can be made to this application, all of which fall within the protection scope of this application.
Claims
1. A CEMS instrument self-calibration three-way solenoid valve, characterized in that, Comprising: a tee joint comprising a first gas inlet end, a second gas inlet end and a gas outlet end, wherein, the first gas inlet end is in communication with a first pipe, the first pipe being provided with a first solenoid valve; the second gas inlet end is in communication with a second pipe, the second pipe being provided with a second solenoid valve; the gas outlet end is in communication with a third pipe.
2. The CEMS instrument self-calibrating three-way solenoid valve of claim 1, wherein, the first solenoid valve is a normally open solenoid valve.
3. The CEMS instrument self-calibrating three-way solenoid valve of claim 2, wherein, the second solenoid valve is a normally closed solenoid valve.
4. The CEMS instrument self-calibrating three-way solenoid valve of claim 3, wherein, the first pipe is provided with a measuring gas inlet, the measuring gas inlet being in communication with the first solenoid valve.
5. The CEMS instrument self-calibrating three-way solenoid valve of claim 4, wherein, the second pipe is provided with an air inlet, the air inlet being in communication with the second solenoid valve.
6. The CEMS instrument self-calibrating three-way solenoid valve of claim 5, wherein, the third pipe is provided with a gas outlet.
7. The CEMS instrument self-calibrating three-way solenoid valve of claim 6, wherein, the first pipe is a PVE pipe.
8. The CEMS instrument self-calibrating three-way solenoid valve of claim 7, wherein, the second pipe is a PVE pipe.
9. The CEMS instrument self-calibrating three-way solenoid valve of claim 8, wherein, the third pipe is a PVE pipe.
10. A CEMS meter self-calibration system, characterized by, a CEMS instrument self-calibration tee solenoid valve comprising any one of claims 1-9.