Resonance self-cleaning type flue gas sampling probe of denitration system

Abstract

The invention discloses a resonance self-cleaning type denitration system flue gas sampling probe which comprises a probe body, a resonance excitation assembly is arranged outside the probe body, and the resonance excitation assembly is composed of a micro vibration exciter, a resonance platform and a mounting box body; the probe main body is partially positioned in the mounting box body and partially positioned outside the mounting box body, and a filter element is arranged at the front end of the part, positioned outside the mounting box body, of the probe main body; the micro vibration exciter and the resonance platform are positioned in the mounting box body, and the resonance platform is positioned between the micro vibration exciter and the probe main body. By arranging the resonance excitation assembly to generate vibration with specific frequency, accumulated dust in the sampling channel and the filter element area can be effectively loosened and removed, and the device is particularly suitable for severe environments with high dust and high-viscosity smoke; compared with a traditional blowback or mechanical vibration mode, resonance cleaning energy consumption is lower, the effect is more durable, and frequent maintenance is not needed.

Description

TECHNICAL FIELD

[0001] The present application relates to a resonant self-cleaning flue gas sampling probe for a denitration system. BACKGROUND

[0002] With the increasingly stringent environmental regulations, the emission control of nitrogen oxides (NO x ) has become an important part of coal-fired industries such as power plants, cement plants, and steel plants. Selective catalytic reduction (SCR) denitration technology has been widely promoted in industrial applications due to its high and stable denitration effect. In the SCR system, real-time monitoring of flue gas composition is a key technical means to ensure denitration efficiency, control ammonia-nitrogen ratio, and prevent ammonia escape.

[0003] As a core component of the flue gas online monitoring system (CEMS), the stability and cleaning ability of the flue gas sampling probe directly affect the accuracy and reliability of the measurement data. In the high-temperature, high-dust, and highly corrosive flue gas environment, the sampling probe is prone to problems such as blockage, dust accumulation, and corrosion, leading to discontinuous sampling, distorted data, and even system shutdown.

[0004] Although sampling probes with backwashing function and heating insulation have been introduced on the market, these devices still have many shortcomings and cannot operate stably for a long time in harsh conditions. Therefore, it is of great engineering significance and market value to develop a flue gas sampling probe with self-cleaning ability, strong anti-blocking performance, and long maintenance cycle. The common flue gas sampling probes mainly use backwashing dust removal, heating insulation, and vibration dust removal to prevent blockage, but all have certain shortcomings.

[0005] The compressed air backwashing dust removal scheme uses timed injection of compressed air to remove dust in the sampling channel. Although this method can extend the service life of the probe to some extent, it requires high-quality compressed air and complex pipeline design, increases system complexity, and is still prone to blockage in high-viscosity dust environments.

[0006] The heating insulation scheme maintains the temperature of the sampling channel above the acid dew point through electric heating to reduce condensation and crystallization. However, heating cannot solve the problem of dust deposition, especially particle blockage in high-dust concentration environments.

[0007] Mechanical vibration type dust removal probes are equipped with electric or pneumatic vibrators on the probe shell to loosen the accumulated dust. However, such mechanical vibration devices often have complex structures, high energy consumption, many wear parts, and frequent maintenance, making them unsuitable for continuous long-term operation.

[0008] To solve the above problems, the present application is proposed. SUMMARY

[0009] The present application relates to a resonant self-cleaning flue gas sampling probe for a denitration system.

[0010] The object of the present application can be achieved by the following technical solutions:

[0011] A resonance self-cleaning denitration system flue gas sampling probe, comprising a probe main body, a resonance excitation assembly is arranged outside the probe main body, the resonance excitation assembly is composed of a micro exciter, a resonance platform and a mounting box body; the probe main body is partially located in the mounting box body and partially located outside the mounting box body, a filter core is arranged at the front end of the part of the probe main body located outside the mounting box body; the micro exciter and the resonance platform are located in the mounting box body, and the resonance platform is located between the micro exciter and the probe main body.

[0012] Preferably, the resonance platform comprises a support plate and a spring, the support plate is located at the upper end of the spring, and the upper surface of the support plate is in close contact with the micro exciter; the lower end of the spring directly contacts the probe main body.

[0013] Further, a flow sensor is integrated in the inside of the probe main body.

[0014] Preferably, an air cooling jacket is integrated on the outer layer of the probe main body, the spring is located above the air cooling jacket, an air inlet pipe connecting port is arranged above the air cooling jacket, and an air outlet pipe connecting port is arranged at the diagonal position below the air inlet pipe connecting port.

[0015] Further, a temperature sensor is arranged at the diagonal position above the inside of the air cooling jacket, and a vibration sensor is further arranged in the inside of the air cooling jacket.

[0016] Preferably, flange plates are arranged at the two ends of the air cooling jacket, probe sleeves are arranged on the inner sides of the flange plates, vibration springs are arranged between the flange plate probe sleeves, flange connecting holes are arranged on the flange plates, the flange connecting holes are used to realize the connection of the flange plates and the air cooling jacket, through holes are arranged in the middle of the probe sleeves, and the protruding ends of the two sides of the air cooling jacket are arranged in the through holes in the middle of the probe sleeves.

[0017] Further, the mounting box body is made of high-strength alloy and constitutes a closed resonance cavity in the inside.

[0018] Further, the air inlet pipe connecting port is connected to a compressed air source.

[0019] Preferably, a buzzer is arranged in the inside of the air cooling jacket.

[0020] Further, the micro exciter is an electromagnetic driver.

[0021] Beneficial technical effects:

[0022] 1. The present application can effectively loosen and remove the accumulated dust in the sampling channel and filter core area by setting the specific frequency vibration generated by the resonance excitation assembly, especially suitable for harsh environments with high dust and high viscosity flue gas. Compared with the traditional back blowing or mechanical vibration method, the resonance cleaning has lower energy consumption and more lasting effect, and does not need frequent maintenance.

[0023] 2. The present application sets the air inlet pipe connection port, air outlet pipe connection port, temperature sensor, vibration sensor and buzzer in the air cooling sleeve for temperature control design. Through real-time adjustment of compressed air flow and temperature through temperature control design, the local overheating aging or acid dew point corrosion of the probe is avoided, and the service life of the key components is further prolonged.

[0024] 3. The present application realizes full-automatic monitoring and cleaning control by integrating flow, temperature, vibration and other multi-sensor data, reduces the need for manual intervention, supports manual and automatic dual-mode operation, has high maintenance flexibility, and can adapt to different factory operation and maintenance habits. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below with reference to the accompanying drawings.

[0026] Figure 1 is a schematic diagram of the probe structure of the resonance self-cleaning denitration system of the present application.

[0027] Figure 2 is a schematic diagram of the probe body structure of the present application.

[0028] Figure 3 is a schematic diagram of the air cooling sleeve structure of the present application.

[0029] Figure 4 is a schematic diagram of the flange structure of the present application.

[0030] Figure 5 is a schematic diagram of the resonance platform structure of the present application.

[0031] Marked in the figure: 1, filter core; 2, probe body; 21, gas flow sensor; 3, mounting box body; 4, air inlet pipe; 5, exciter; 6, resonance platform; 7, air cooling sleeve; 71, air inlet pipe connection port; 72, air outlet pipe connection port; 73, temperature sensor; 74, vibration sensor; 75, buzzer; 8, flange; 81, flange connection hole; 82, vibration spring; 83, probe sleeve; 9, air outlet pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] As shown in the drawings, Figures 1-5 A resonance self-cleaning denitration system flue gas sampling probe includes a probe main body 2, and a resonance excitation assembly is arranged outside the probe main body 2, and the resonance excitation assembly is composed of a micro exciter 5, a resonance platform 6 and a mounting box body 3. The probe main body 2 is partially arranged in the mounting box body 3 and partially arranged outside the mounting box body 3, and a filter element 1 is arranged at the front end of the part of the probe main body 2 located outside the mounting box body 3. The micro exciter 5 and the resonance platform 6 are located in the mounting box body 3, and the resonance platform 6 is located between the micro exciter 5 and the probe main body 2. The probe main body 2 and the mounting box body 3 are non-fixedly and forcibly connected.

[0034] The micro exciter 5 adopts an electromagnetic driver and generates vibration of a specific frequency under the instruction of a control system. The micro exciter 5 is connected with the probe main body 2 through the resonance platform 6, and vibration is transmitted to the internal passage of the probe main body 2 through the resonance platform 6, so as to cause slight high-frequency vibration and prevent dust deposition or blockage.

[0035] The resonance platform 6 includes a support plate 61 and a spring 62, the support plate 61 is located at the upper end of the spring 62, and the upper surface of the support plate 61 is close to the micro exciter 5; the lower end of the spring 62 directly contacts the probe main body 2, and the micro exciter 5 transmits vibration to the internal passage of the probe main body 2 through the spring 62 of the resonance platform 6.

[0036] A flow sensor 21 is integrated in the probe main body 2, for monitoring the internal passage of the probe main body 2 in real time. When the pressure measured by the flow sensor 21 rises or the flow rate drops beyond a preset range, the control system determines that there is a risk of blockage, and starts the micro exciter 5, which performs cleaning at a preset frequency and amplitude. After cleaning, the system detects again to ensure that the passage of the probe main body 2 returns to normal. In addition, a control panel can also be arranged, and an operator can manually trigger the cleaning function through the control panel to perform regular or emergency maintenance.

[0037] A gas cooling jacket 7 is integrated on the outer layer of the probe main body 2, the spring 62 is located above the gas cooling jacket 7, an air inlet pipe connecting port 71 is arranged above the gas cooling jacket 7, an air outlet pipe connecting port 72 is arranged below the air inlet pipe connecting port 71 diagonally, a temperature sensor 73 is arranged inside the gas cooling jacket 7 diagonally, and a vibration sensor 74 is also arranged inside the gas cooling jacket 7. A buzzer 75 is arranged inside the gas cooling jacket 7.

[0038] The air inlet pipe connecting port 71 is connected to a compressed air source, and the air outlet pipe connecting port 72 leads to the outside. The temperature detection sensor 73 is installed on the rear side of the inner wall of the sampling channel and monitors the temperature in real time. The sampling channel refers to the space of the air cooling sleeve 7. When the temperature exceeds the preset threshold value, the control system starts the air cooling function. The compressed air source is also connected to a pressure controller and a temperature regulator. The compressed air in the compressed air source is processed by the pressure controller and the temperature regulator and then enters the air cooling channel through the air inlet pipe connecting port 71, taking away the heat of the sampling area, reducing the temperature of the probe main body 2, and preventing aging or corrosion. The pressure controller adjusts the air flow to avoid interference with sampling; the temperature regulator ensures the air cooling effect.

[0039] The air cooling sleeve 7 is provided with flanges 8 at both ends. The inner side of the flange 8 is provided with a probe sleeve 83, and the flange 8 probe sleeve 83 is provided with a vibration spring 82. The flange 8 is provided with a flange connecting hole 81 for connecting the air cooling sleeve 7 through the flange 8. The probe sleeve 83 is provided with a through hole structure, and the protruding ends of the air cooling sleeve 7 are arranged in the through hole structure in the middle of the probe sleeve 83. Under the action of the vibration spring 82, the air cooling sleeve 7 vibrates relative to the flange 8.

[0040] The air inlet pipe 4 passes through the mounting box body 3 and is connected to the air inlet pipe connecting port 71. The air outlet pipe 9 passes through the mounting box body 3 and is connected to the air outlet pipe connecting port.

[0041] The present application is equipped with a temperature detection sensor 73 and a regulation system. The working principle of the regulation system is as follows: when the temperature of the sampling area exceeds the preset threshold value, the control system automatically starts the air cooling function, adjusts the flow and temperature of the compressed air, and efficiently cools the probe to prevent local overheating, aging, or acid dew point corrosion, improve the adaptability of the equipment in high temperature flue gas environment, and reduce the operation and maintenance cost.

[0042] The control system evaluates the stability risk according to the data of the temperature sensor 73 and the vibration sensor 74. When the temperature measured by the temperature sensor 73 or the vibration measured by the vibration sensor 74 exceeds the threshold value, the buzzer 75 will alarm to remind the user to adjust the working condition or check the air cooling effect.

[0043] The mounting box body 3 is made of high-strength alloy and constitutes a closed resonance cavity inside to absorb external vibration energy.

[0044] The present application provides a resonance excitation assembly, which realizes the self-cleaning function through a micro exciter 5 and a resonance platform 6. The exciter and the resonance platform are arranged outside the flue gas sampling probe and are in communication with the sampling channel. The micro exciter 5 generates vibrations of a specific frequency under the instruction of the control system. The vibration of the micro exciter 5 causes the vibration of the spring 62 of the resonance platform 6, and the vibration of the spring 62 causes the vibration of the gas cooling sleeve 7. Thus, the sampling channel and the filter element 1 area are continuously vibrated, which can prevent the deposition of dust or eliminate the blockage. The system can automatically trigger the cleaning function according to the real-time monitoring data of the flow sensor, or be manually started by a worker, so as to ensure the long-term stable operation of the probe, reduce the maintenance frequency, and improve the continuity and accuracy of the flue gas monitoring of the denitration system.

[0045] The present application adopts a multi-sensor cooperative intelligent control system to realize the automatic management of blockage early warning, vibration suppression and temperature regulation. Through the data linkage of flow, temperature, vibration and other sensors, the system can judge the running state of the sampling probe in real time, automatically adjust the excitation frequency, vibration intensity and cooling airflow, ensure the stability and reliability of the sampling probe under complex working conditions, and reduce the need for manual intervention, thereby improving the monitoring efficiency of the denitration system.

[0046] The present application realizes the real-time monitoring and automatic cleaning of the sampling channel and the filter element area by arranging a resonance excitation assembly outside the sampling probe and integrating advanced detection mechanisms. The system continuously detects whether there is a risk of blockage or dust deposition inside the probe. Once potential problems or actual blockage are identified, the control system will automatically trigger the resonance excitation assembly. The resonance excitation assembly generates a vibration effect at a specific frequency, causing the sampling channel to vibrate continuously, effectively preventing dust deposition and eliminating blockage hazards. The high-frequency low-amplitude vibration formed by the resonance excitation assembly can produce millimeter-level displacement on the surface of the probe, breaking the adhesion between the dust and the surface, and being suitable for removing light dust or loose deposits. For low-viscosity sulfate or ammonium salt crystals, it is mainly used to prevent initial deposition.

[0047] This automatic self-cleaning function not only improves the self-cleaning ability of the probe and prolongs its service life, but also significantly reduces the maintenance frequency and operation difficulty, ensuring the long-term stability and continuity of the denitration system for flue gas sampling. At the same time, the system supports manual start of the cleaning function by the operator, providing flexible maintenance options.

[0048] In order to adapt to the high-temperature and high-vibration flue environment, an environmental condition detection system is provided. The temperature change and vibration intensity of the outer surface of the flue gas sampling probe are monitored in real time to evaluate the potential impact of these factors on the stability of the probe. These structures absorb the stress caused by external vibration and thermal expansion, maintain the mechanical strength of the probe, and ensure the overall stability of the equipment in harsh environments. This active control strategy significantly enhances the long-term safe operation capability of the flue gas sampling system.

[0049] In order to optimize the temperature management of the sampling area, the application integrates a gas cooling sleeve in the probe body and is equipped with a temperature detection sensor. The system monitors the temperature change of the sampling area in real time, and when it detects that high temperature may cause local aging, corrosion or component wear, the control system will automatically start the gas cooling function. By introducing compressed air flow through the gas chamber controlled by pressure and temperature, the probe realizes efficient temperature control and heat dissipation. This automatic control measure effectively reduces the thermal stress caused by the direct entry of flue gas into the probe, prolongs the continuous operation time of the equipment, reduces the operation cost, and at the same time improves the adaptability of the flue gas parameter monitoring system in high temperature environment.

[0050] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A resonant self-cleaning denitrification system flue gas sampling probe, characterized in that: The utility model comprises a probe body, and a resonance excitation component is arranged on the outside of the probe body, and the resonance excitation component is composed of a micro vibrator, a resonance platform and an installation box body; the probe body is partially located inside the installation box body and partially located outside the installation box body, and a filter element is arranged at the front end of the part of the probe body located outside the installation box body; the micro vibrator and the resonance platform are located in the installation box body, and the resonance platform is located between the micro vibrator and the probe body.

2. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 1 is characterized by: The resonance platform includes a support plate and a spring. The support plate is located at the upper end of the spring, and the upper surface of the support plate is in close contact with the micro-vibrator; the lower end of the spring directly contacts the probe body.

3. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 2 is characterized by: A flow sensor is integrated inside the probe body.

4. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 3 is characterized by: An air cooling sleeve is integrated on the outer layer of the probe body, the spring is located above the air cooling sleeve, an air inlet pipe connection port is provided above the air cooling sleeve, and an air outlet pipe connection port is provided below the air cooling sleeve at a position diagonally opposite to the air inlet pipe connection port.

5. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 4 is characterized by: A temperature sensor is provided at a diagonal position inside the upper part of the air cooling jacket, and a vibration sensor is also provided inside the upper part of the air cooling jacket.

6. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 4 is characterized by: Flanges are provided at both ends of the air-cooling sleeve, a probe cover is provided on the inner side of the flange, a vibration spring is provided between the flange and the probe cover, a flange connecting hole is provided on the flange, the flange connecting hole is used to realize connection with the air-cooling sleeve through the flange, a through-hole structure is provided in the middle of the probe cover, and the protruding ends on both sides of the air-cooling sleeve are placed in the through-hole structure in the middle of the probe cover.

7. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 6, characterized in that: The installation box body is made of high-strength alloy, and a closed resonance cavity is formed inside.

8. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 4, characterized in that: The air inlet pipe connecting port is connected to a compressed air source.

9. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 6, characterized in that: A buzzer is provided at the lower part of the air cooling jacket.

10. The resonant self-cleaning denitrification system flue gas sampling probe according to claim 9, characterized in that: The micro vibrator adopts an electromagnetic driver.

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