Front air exhaust filtering device of portable flue gas analyzer

Abstract

The utility model discloses a front exhaust filtering device of a portable flue gas analyzer, which is characterized in that a flue gas filtering mechanism comprises a gas inlet joint, a flue gas dust coarse filtering cylinder, a flue gas dust fine filtering cylinder, a diaphragm pump and a gas outlet joint, and a one-way check valve is arranged between the diaphragm pump and the gas outlet joint; a charging interface of the air exhaust power mechanism is connected with the portable power source in parallel, the self-locking switch with the lamp is connected with a positive electrode outgoing line of the portable power source in series, the nixie tube voltmeter is connected with a positive electrode outgoing line and a negative electrode outgoing line of the portable power source behind the self-locking switch with the lamp in parallel, and the driving motor is connected with a circuit behind the nixie tube voltmeter in series. The portable flue gas analyzer solves the problem that the portable flue gas analyzer is difficult to extract flue gas in a high negative pressure area, is provided with the coarse and fine dust filter cartridges, and is used for pre-filtering the extracted and analyzed flue gas, so that a gas path of the portable flue gas analyzer is protected, and the maintenance period and the service life of the portable flue gas analyzer are prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of energy consumption testing and environmental monitoring of thermal power plants, and specifically relates to a pre-exhaust filter device for a portable flue gas analyzer. Background Art

[0002] Portable flue gas analyzers are often used in energy consumption testing and environmental monitoring of pulverized coal boilers in thermal power plants because of their small size, portability, and the absence of an external power supply. However, due to the small size and low power of their built-in diaphragm vacuum pumps, the air flow rate is low during operation, and the negative pressure formed is also low. They can only extract flue gas from the water-cooled wall area. In the air preheater or dust collector inlet and outlet areas, due to the large negative pressure, the portable flue gas analyzer extracts flue gas slowly or even fails to extract flue gas. Utility Model Content

[0003] The utility model aims to provide a pre-extraction filter device for a portable flue gas analyzer to solve the problem that the portable flue gas analyzer cannot extract flue gas in a high negative pressure area.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A pre-exhaust filter device for a portable flue gas analyzer comprises a flue gas filtering mechanism and an exhaust power mechanism, wherein the flue gas filtering mechanism comprises an air inlet joint, a flue gas dust coarse filter cartridge, a flue gas dust fine filter cartridge, a diaphragm pump and an air outlet joint connected in sequence, and a one-way check valve is arranged between the diaphragm pump and the air outlet joint; the exhaust power mechanism comprises a driving motor of the diaphragm pump, a digital tube voltmeter, a self-locking switch with light, a charging interface and a portable power supply, wherein the charging interface is connected in parallel with the portable power supply, the self-locking switch with light is connected in series with the positive lead wire of the portable power supply, the digital tube voltmeter is connected in parallel with the positive and negative lead wires of the portable power supply behind the self-locking switch with light, and the driving motor is connected in series with the circuit behind the digital tube voltmeter.

[0006] In order to further realize the utility model, the air inlet joint and the air outlet joint respectively adopt a through-plate pagoda-type air inlet joint and a through-plate pagoda-type air outlet joint.

[0007] In order to further realize the utility model, the rated voltages of the driving motor and the portable power supply are both 12V.

[0008] In order to further realize the utility model, a silicone tube is arranged to connect the air inlet joint, the flue gas dust coarse filter cartridge, the flue gas dust fine filter cartridge, the diaphragm pump and the air outlet joint.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The utility model solves the problem that it is difficult for a portable flue gas analyzer to extract flue gas in a high negative pressure area, and is equipped with a coarse and fine dust filter cartridge to pre-filter the flue gas extracted and analyzed, thereby protecting the gas path of the portable flue gas analyzer and extending the maintenance period and service life of the portable flue gas analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] The meanings of the accompanying symbols are as follows: 1. Flue gas filtering mechanism; 2. Exhaust power mechanism; 3. Air inlet connector; 4. Flue gas dust coarse filter cartridge; 5. Flue gas dust fine filter cartridge; 6. Diaphragm pump; 7. One-way check valve; 8. Air outlet connector; 9. Driving motor; 10. Digital tube voltmeter; 11. Self-locking lighted switch; 12. Charging interface; 13. Portable power supply; 14. Silicone tube. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0014] like Figure 1 As shown, a portable flue gas analyzer pre-exhaust filter device includes a flue gas filter mechanism 1 and an exhaust power mechanism 2, wherein the flue gas filter mechanism 1 includes an air inlet joint 3, a flue gas dust coarse filter cartridge 4, a flue gas dust fine filter cartridge 5, a diaphragm pump 6 and an air outlet joint 8 connected in sequence, a silicone tube 14 is arranged between the air inlet joint 3, the flue gas dust coarse filter cartridge 4, the flue gas dust fine filter cartridge 5, the diaphragm pump 6 and the air outlet joint 8 to communicate with each other, the air inlet joint 3 and the air outlet joint 8 respectively adopt a through-plate pagoda-type air inlet joint and a through-plate pagoda-type air outlet joint, and the diaphragm pump 6 and the air outlet joint 8 are connected to each other. A one-way check valve 7 is arranged between the two components; the air extraction power mechanism 2 comprises a driving motor 9 of a diaphragm pump 6, a digital tube voltmeter 10, a self-locking lighted switch 11, a charging interface 12 and a portable power supply 13, wherein the charging interface 12 is connected in parallel with the portable power supply 13, the self-locking lighted switch 11 is connected in series to the positive lead wire of the portable power supply 13, the digital tube voltmeter 10 is connected in parallel to the positive and negative lead wires of the portable power supply 13 behind the self-locking lighted switch 11, the driving motor 9 is connected in series to the circuit behind the digital tube voltmeter 10, and the rated voltages of the driving motor 9 and the portable power supply 13 are both 12V.

[0015] During operation, the through-plate pagoda-type air outlet connector 8 is connected to the flue gas inlet hole of the portable flue gas analyzer. After closing the self-locking illuminated switch 11, the closing indicator light of the self-locking illuminated switch 11 is on, the digital tube voltmeter 10 displays the current voltage of the portable power supply 13, and the drive motor 9 of the diaphragm pump 6 starts working. After the portable flue gas analyzer is turned on, completes the self-check and enters the test and analysis state, the through-plate pagoda-type air inlet connector 3 is connected to the metal hollow tube for extracting flue gas, and the portable flue gas analyzer can analyze and measure the extracted flue gas.

[0016] After the operation is completed, disconnect the through-plate pagoda-type air inlet connector 3 from the metal hollow tube for extracting flue gas. After the parameter value measured and displayed by the portable flue gas analyzer is the atmospheric parameter value, first disconnect the through-plate pagoda-type air outlet connector 8 from the flue gas inlet hole of the portable flue gas analyzer, and then disconnect the self-locking illuminated switch 11. The indicator light of the self-locking illuminated switch 11 goes out, and the pre-exhaust filter device of the portable flue gas analyzer stops working.

[0017] The rated voltage of the driving motor of the diaphragm pump 6 is 12V, which matches the rated voltage of the portable power supply 13 of 12V. The portable power supply 13 has integrated protection circuits such as overshoot, overdischarge, overcurrent, and short circuit. When charging, a matching 12V lithium battery charger is used. The charging cut-off voltage is 12.5V, and the discharging cut-off voltage is 11.1V. The range of the digital tube voltmeter 10 is 4V~30V. The charging and discharging voltages can be monitored by the digital tube voltmeter 10.

Claims

1. A portable flue gas analyzer pre-extraction filter device, characterized in that: The invention comprises a smoke filter mechanism (1) and an air extraction power mechanism (2), wherein the smoke filter mechanism (1) comprises an air inlet joint (3), a smoke dust coarse filter cartridge (4), a smoke dust fine filter cartridge (5), a diaphragm pump (6) and an air outlet joint (8) which are connected in sequence, and a one-way check valve (7) is arranged between the diaphragm pump (6) and the air outlet joint (8); the air extraction power mechanism (2) comprises a drive motor (9) of the diaphragm pump (6), a digital tube voltmeter (10), a self-locking lighted switch (11), a charging interface (12) and a portable power source (13), wherein the charging interface (12) is connected in parallel with the portable power source (13), the self-locking lighted switch (11) is connected in series with the positive lead wire of the portable power source (13), the digital tube voltmeter (10) is connected in parallel with the positive and negative lead wires of the portable power source (13) after the self-locking lighted switch (11), and the drive motor (9) is connected in series with the circuit after the digital tube voltmeter (10).

2. The portable flue gas analyzer pre-exhaust filter device according to claim 1, characterized in that: The air inlet joint (3) and the air outlet joint (8) are respectively a through-plate pagoda-type air inlet joint and a through-plate pagoda-type air outlet joint.

3. The portable flue gas analyzer pre-exhaust filter device according to claim 1 or 2, characterized in that: The rated voltages of the driving motor (9) and the portable power source (13) are both 12V.

4. The portable flue gas analyzer pre-exhaust filter device according to claim 3, characterized in that: A silicone tube (14) is provided between the air inlet joint (3), the flue gas dust coarse filter cartridge (4), the flue gas dust fine filter cartridge (5), the diaphragm pump (6) and the air outlet joint (8) for communication.

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