Humidity detector with protective device

Abstract

The humidity detector with the protection device comprises a box body (1), a dust cover (2), a humidity detector, an air pump (4) and a heat dissipation pipe (5), a heat dissipation opening (11) is formed in the box body, the dust cover is rectangular, one end of the dust cover is fixedly connected with the box body, the other end of the dust cover extends in the direction away from the box body, and a detection cavity for containing the humidity detector is formed in the dust cover. The humidity detector is fixedly arranged in the dust cover, a probe (32) of the humidity detector is located at the end, away from the box body, in the dust cover, and a thermocouple (31) is arranged on the humidity detector. The air pump is fixedly arranged in the box body, an air suction port (41) of the air pump is communicated with the heat dissipation port, an air inlet (51) of the heat dissipation pipe is communicated with an exhaust port (42) of the air pump, and an air outlet (52) of the heat dissipation pipe penetrates through the side wall of the box body and extends into the dust cover. According to the utility model, the interference of dust and salt mist on the accuracy of the humidity detector can be prevented, and the probe of the humidity detector is prevented from being burnt by high temperature.

Description

Technical Field

[0001] This utility model relates to a humidity detector with a protective device, and more particularly to the structure of a humidity detector with a protective device. Background Technology

[0002] In the potassium chloride production process, wet potassium chloride material needs to undergo a drying process to obtain the final product. The drying process typically includes a burner, hot air furnace, rotary dryer, dust collector, horizontal air box, and induced draft fan. The flue gas generated after the wet potassium chloride material is dried in the rotary dryer enters the dust collector for dust removal, then passes through the horizontal air box and is discharged by the induced draft fan to the next process. The horizontal air box allows the airflow to enter the induced draft fan smoothly, reducing resistance and turbulence, and evenly distributing the airflow to all blades of the induced draft fan, ensuring stable operation and improving its efficiency. This process is energy-intensive. To improve drying efficiency and achieve energy conservation and emission reduction, online humidity measurement of the flue gas emitted from the rotary dryer is necessary. Humidity control is used to monitor the adhesion of the filter bags, and the flue gas dew point temperature is measured to control the outlet temperature of the flue gas pipeline, preventing water vapor condensation and corrosion of the pipeline, and ensuring efficient operation of the waste heat recovery system.

[0003] Existing online humidity measurement methods involve installing a humidity detector in a flat ventilation box. Current online humidity detectors mainly include resistive-capacitive hygrometers, wet-dry oxygen hygrometers, and laser humidity detectors. However, due to the complex and harsh environment of the drying process, with post-drying gas temperatures exceeding 120°C, resistive-capacitive and wet-dry oxygen hygrometers are unsuitable for high-temperature applications. Only non-contact laser humidity detectors offer technical feasibility. Laser humidity detectors utilize optical methods for measurement and possess characteristics such as high reliability, high accuracy, and fast response speed.

[0004] However, when adjusting the drying process, there will be brief temperature fluctuations of 200℃ to 300℃. Excessive short-term temperatures can burn out the probe of the laser humidity detector. Furthermore, the flue gas contains a large amount of salt spray and dust, causing the laser humidity detector's detection light intensity to be too low, interfering with the accuracy of the measuring instrument and even preventing it from taking measurements. In addition, salt corrosion can also damage the measuring instrument, significantly shortening its lifespan.

[0005] The purpose of this invention is to provide a humidity detector with a protective device, which solves the problems of short service life and inaccurate measurement results of existing humidity measuring instruments when measuring potassium chloride drying flue gas. Summary of the Invention

[0006] To solve the above problems, this utility model provides a humidity detector with a protective device, including a housing 1, a dust cover 2, a humidity detector, an air pump 4, and a heat dissipation pipe 5. The housing 1 is provided with a heat dissipation vent 11. The dust cover 2 is rectangular, with one end fixedly connected to the housing 1 and the other end extending away from the housing 1. The dust cover 2 forms a detection cavity 24 inside to accommodate the humidity detector.

[0007] A humidity detector is fixedly installed inside the dust cover 2. The probe 32 of the humidity detector is located at the end of the dust cover 2 away from the housing 1. A thermocouple 31 is installed on the humidity detector near the probe 32. An air pump 4 is fixedly installed inside the housing 1. The air inlet 41 of the air pump 4 is connected to the heat dissipation vent 11. The air inlet 51 of the heat dissipation pipe 5 is connected to the air outlet 42 of the air pump 4. The air outlet 52 of the heat dissipation pipe 5 extends through the side wall of the housing 1 into the dust cover 2.

[0008] When using this utility model, the box 1 is installed on the outer wall of the flat air box in the drying process, and the dust cover 2 is inserted into the flat air box. The flue gas in the flat air box passes through the dust cover 2 and enters the dust cover 2. The dust in the flue gas is filtered by the dust cover 2. The humidity and temperature of the flue gas inside the dust cover 2 are detected by a humidity detector. When the temperature of the flue gas suddenly rises, the air pump 4 draws in outside air and blows it around the humidity detector to cool it down until the flue gas returns to the normal temperature.

[0009] This invention utilizes a dust cover 2 to house the humidity detector. The dust cover 2 filters dust and salt spray from the flue gas, preventing interference with the humidity detector's measurements and ensuring accurate results. It also reduces the risk of salt corrosion damage to the instrument. Furthermore, by incorporating an air pump 4 and a heat dissipation pipe 5, when the flue gas temperature suddenly rises, the air pump 4 draws in external air and blows it around the humidity detector to cool it, preventing the detector's probe 32 from burning out due to high temperatures. This invention solves the problems of short service life and inaccurate measurement results in existing humidity meters when measuring potassium chloride drying flue gas.

[0010] Preferably, the dust cover 2 includes a support 21 and a filter layer 22. The support 21 is a rectangular frame structure formed by multiple support rods 23 fixedly connected together, and the filter layer 22 is fixedly covered on the outer periphery of the support 21. The support 21 can support the filter layer 22 to form a detection chamber 24 for accommodating the humidity detector, and the filter layer 22 can filter out dust and salt spray in the flue gas.

[0011] Preferably, the humidity detector is a laser humidity detector 3.

[0012] Preferably, the device also includes an alarm 61, which is fixedly installed on the top of the housing 1. When the laser humidity detector 3 is working, it monitors the light intensity value of the internal optical path system in real time. If the light intensity parameter is abnormal, it will alert maintenance personnel to replace the filter cloth of the dust cover 2 through a light alarm. After replacement, the alarm 61 will be turned off.

[0013] Preferably, the air outlet 52 of the heat dissipation pipe 5 is close to the probe 32 of the laser humidity detector 3. By placing the air outlet 52 of the heat dissipation pipe 5 close to the probe 32 of the laser humidity detector 3, the probe 32 of the laser humidity detector 3 and the surrounding smoke can be quickly cooled by the outside air, preventing the probe 32 of the laser humidity detector 3 from being burned by high temperature.

[0014] Preferably, the filter layer 22 is a woven filter cloth.

[0015] Preferably, the housing 1 is provided with a mounting plate 12, and the mounting plate 12 is provided with mounting holes. By providing the mounting plate 12 on the housing 1 and providing mounting holes on the mounting plate 12, bolts 121 can be passed through the mounting holes to fix the housing 1 to the flat bellows.

[0016] Preferably, the controller 6 is electrically connected to the laser humidity detector 3, the air pump 4 and the alarm 61. When the temperature inside the dust cover 2 suddenly rises, the controller 6 controls the air pump 4 to draw in outside air and blow it into the dust cover 2 to cool it down. When the light intensity is weak, the controller controls the alarm 61 to sound an alarm, prompting maintenance personnel to replace the filter cloth of the dust cover 2. After replacement, the alarm 61 is turned off. Attached Figure Description

[0017] Figure 1 Schematic diagram of the overall structure of the humidity detector with protective device;

[0018] Figure 2 Schematic diagram of the internal structure of a humidity detector with protective device;

[0019] Figure 3 Usage status diagram.

[0020] In the diagram, 1. Housing, 11. Heat dissipation vent, 12. Mounting plate, 121. Bolt, 2. Dust cover, 21. Bracket, 22. Filter layer, 23. Support rod, 24. Detection chamber, 3. Laser humidity meter, 31. Thermocouple, 32. Probe, 4. Air pump, 41. Inlet, 42. Exhaust, 5. Heat dissipation pipe, 51. Air inlet, 52. Air outlet, 6. Controller, 61. Alarm, 7. Flat bellows. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, the humidity detector with protective device includes a housing 1, a dust cover 2, a humidity meter, an air pump 4, a heat dissipation pipe 5, and a controller 6.

[0023] An alarm 61 is installed on the top of the enclosure 1, a heat dissipation vent 11 is installed on the side wall, and a mounting plate 12 is installed on the other side wall. The mounting plate 12 has mounting holes. The mounting holes are used to insert bolts 121, which can be used to fix the enclosure 1 to the flat ventilation box 7.

[0024] The dust cover 2 is rectangular and includes a support 21 and a filter layer 22. The support 21 is a rectangular frame structure formed by multiple support rods 23 fixedly connected together, and the filter layer 22 is fixedly covered on the outer periphery of the support 21.

[0025] In this embodiment, the filter layer 22 is a woven filter cloth. In other embodiments, the filter layer 22 may also be a non-woven felt cloth with filtering function.

[0026] The bracket 21 can support the filter layer 22 and form a detection chamber 24 to accommodate the humidity detector. The filter layer 22 can filter out dust and salt spray in the flue gas.

[0027] One end of the dust cover 2 is fixedly connected to the housing 1, and the other end extends away from the housing 1. The interior of the dust cover 2 forms a detection chamber 24 for accommodating the humidity detector.

[0028] The humidity detector is a laser humidity detector 3, which is located inside the dust cover 2. The probe 32 of the laser humidity detector 3 is located at the end of the dust cover 2 away from the housing 1. A thermocouple 31 for measuring temperature is set on the laser humidity detector 3 near the probe 32. The end of the laser humidity detector 3 away from the probe 32 is fixedly connected to the housing 1.

[0029] The probe 32 on the laser humidity detector 3 detects the humidity of the flue gas, and the thermocouple 31 detects the temperature of the flue gas.

[0030] When the laser humidity detector 3 is working, it monitors the light intensity value detected by the internal optical path system in real time. If the light intensity value parameter is abnormal, the alarm 61 will prompt the maintenance personnel to replace the filter cloth of the dust cover 2 through light alarm. After replacement, the alarm 61 will be turned off.

[0031] The air pump 4 is fixedly installed inside the housing 1, and the air intake 41 of the air pump 4 is connected to the heat dissipation vent 11.

[0032] The air inlet 51 of the heat dissipation pipe 5 is connected to the exhaust port 42 of the air pump 4. The air outlet 52 of the heat dissipation pipe 5 extends through the side wall of the housing 1 into the dust cover 2. The air outlet 52 of the heat dissipation pipe 5 is close to the probe 32 of the laser humidity detector 3.

[0033] The air outlet 52 of the heat dissipation pipe 5 is placed close to the probe 32 of the laser humidity detector 3, so that the probe 32 of the laser humidity detector 3 and the surrounding smoke can be cooled down quickly by the outside air, preventing the probe 32 of the laser humidity detector 3 from being burned by high temperature.

[0034] The controller 6 is electrically connected to the laser humidity detector 3, the air pump 4, and the alarm 61, and is used to detect sudden increases in temperature inside the dust cover 2.

[0035] In this embodiment, the controller 6 is connected to the laser humidity detector 3, reads the parameter information detected by the laser humidity detector 3, and obtains the light intensity, temperature, and humidity parameters inside the dust cover. It then determines whether the light intensity and temperature parameters measured by the laser humidity detector 3 are normal. When the temperature suddenly rises, the controller controls the air pump 4 to introduce external air into the outer periphery of the probe 32 for cooling. When the light intensity is weak, it indicates that a large amount of salt spray and dust adheres to the filter cloth of the dust cover 2. At this time, the controller controls the alarm 61 to sound, prompting maintenance personnel to replace the filter cloth of the dust cover 2. After replacement, the alarm 61 is turned off.

[0036] like Figure 3 As shown, during use, the box 1 is fixedly installed on the outer wall of the flat air box 7 in the drying process, so that the dust cover 2 is inserted into the flat air box 7. The flue gas in the flat air box 7 passes through the dust cover 2 and enters the dust cover 2. The dust in the flue gas is filtered by the dust cover 2. The humidity and temperature of the flue gas inside the dust cover 2 are detected by the laser humidity detector 3. When the temperature of the flue gas suddenly rises, the controller 6 controls the air pump 4 to draw in external air and blow it into the vicinity of the laser humidity detector 3 to cool it down until the flue gas returns to the normal temperature. When the light intensity inside the dust cover 2 weakens, the alarm 61 alerts the maintenance personnel to replace the filter cloth of the dust cover 2 through the light alarm. After replacement, the alarm 61 is turned off.

[0037] This invention incorporates a dust cover 2, which houses the laser humidity detector 3. The dust cover 2 filters dust and salt mist from the flue gas, preventing these particles from interfering with the accuracy of the laser humidity detector 3 and reducing the risk of salt corrosion damage to the measuring instrument.

[0038] By installing an air pump 4 and a heat dissipation pipe 5, when the flue gas temperature suddenly rises, the air pump 4 draws in external air and blows it around the laser humidity detector 3 to cool it down, preventing the probe 32 of the laser humidity detector 3 from being burned out by high temperature. By installing an alarm light, when a large amount of salt spray and dust adheres to the filter plate of the dust cover 2, causing the light intensity inside the dust cover 2 to weaken, the alarm 61 will alert maintenance personnel to replace the filter cloth of the dust cover 2. After replacement, the alarm 61 will be turned off.

[0039] It should be noted that the above embodiments are illustrative of the present invention and not intended to limit the present invention.

Claims

1. A humidity detector with a protective device, characterized in that, It includes a housing (1), a dust cover (2), a humidity detector, an air pump (4), and a heat dissipation pipe (5). The housing (1) is provided with a heat dissipation vent (11). The dust cover (2) is rectangular, with one end fixedly connected to the box (1) and the other end extending away from the box (1). The dust cover (2) forms a detection chamber (24) inside to accommodate the humidity detector. The humidity detector is fixedly installed inside the dust cover (2). The probe (32) of the humidity detector is located at the end of the dust cover (2) away from the box (1). A thermocouple (31) is installed on the humidity detector near the probe (32). The air pump (4) is fixedly installed inside the housing (1), and the air inlet (41) of the air pump (4) is connected to the heat dissipation port (11); The air inlet (51) of the heat dissipation pipe (5) is connected to the exhaust port (42) of the air pump (4), and the air outlet (52) of the heat dissipation pipe (5) extends through the side wall of the box (1) into the dust cover (2).

2. The humidity detector with protective device according to claim 1, characterized in that, The dust cover (2) includes a support (21) and a filter layer (22). The bracket (21) is a rectangular frame structure, formed by a fixed connection of multiple support rods (23); The filter layer (22) is fixedly covered on the outer periphery of the support (21).

3. The humidity detector with protective device according to claim 2, characterized in that, The humidity detector is a laser humidity detector (3).

4. The humidity detector with protective device according to claim 3, characterized in that, It also includes an alarm (61). The alarm (61) is fixedly installed on the top of the box (1).

5. The humidity detector with protective device according to claim 4, characterized in that, The air outlet (52) of the heat dissipation pipe (5) is close to the probe (32) of the laser humidity detector (3).

6. The humidity detector with protective device according to claim 5, characterized in that, The filter layer (22) is a woven filter cloth.

7. The humidity detector with protective device according to claim 6, characterized in that, The housing (1) is provided with an installation plate (12), and the installation plate (12) is provided with installation holes.

8. The humidity detector with protective device according to any one of claims 3 to 7, characterized in that, The controller (6) is electrically connected to the laser humidity detector (3), the air pump (4) and the alarm (61) to control the air pump (4) to draw in external air for cooling when the temperature inside the dust cover (2) suddenly rises.

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