A dust-removed odor sampling device for oil shale, comprising an imitation sandfish lizard dustproof chamber, an imitation leaf filter membrane, a single-chip microcomputer controller, a dust collection box, a solenoid valve I, an air pump, and a solenoid valve II, where the solenoid valve I, the imitation sandfish lizard dustproof chamber, the imitation leaf filter membrane, the single-chip microcomputer controller, the air pump, and the solenoid valve II are arranged sequentially from front to rear;
- the imitation sandfish lizard dustproof chamber is a three-way pipe, on which an air inlet channel, a diffusion channel, a dust settlement channel, a sensing channel and a dust collection channel are provided, an upper part of the sensing channel is provided with a jack I, a jack II, a jack III and a jack IV of a gas-sensitive sensor array;
- the air inlet channel is a circular cross-section straight pipe with an inner diameter d1=10-12 mm;
- the diffusion channel is an inclined pipe formed by lofting a front circular cross-section and a rear circular cross-section, where centers of circles of the front and rear cross-sections are at a same horizontal line and the circles are tangent to each other, an inner diameter of the front cross-section is d1=10-12 mm, and an inner diameter of the rear cross-section is d2=28-30 mm;
- the dust settlement channel is formed by lofting a front circular cross-section and a rear semi-circular cross-section, centers of circles of the front and rear cross-sections are concentric, and inner diameters of the front and rear cross-sections are d2=28-30 mm;
- the sensing channel is a circular cross-section bend pipe with an inner diameter d4=10-12 mm and an outer diameter d5=12-14 mm;
- distances between centers of circles of the jack I, jack II, jack III and jack IV are L1=15-18 mm, inner diameters of them are d3=8-9 mm, and heights of all jacks in relative to height of center of cross-section of the air inlet channel are L2=60-62 mm;
- the dust collection channel is formed by lofting an upper elliptical cross-section and a lower circular cross-section, and circles of the upper and lower cross-sections are tangent to each other in their rear directions;
- the single-chip microcomputer controller comprises a control unit, a signal acquisition unit, a touch display screen, and a power supply, where the control unit comprises the solenoid valve I and the solenoid valve II;
- the signal acquisition unit comprises the gas-sensitive sensor array and an analog-to-digital acquisition module;
- the control unit, the signal acquisition unit, and the touch display screen are connected to the power supply through wires;
- the dust collection box comprises a dust passage pipe, a dust collection chamber, and a filter screen, where the dust passage pipe is fixedly connected to and communicated with a center of an upper end of the dust collection chamber, and the filter screen is fixedly connected to a lower end of the dust collection chamber;
- an upper end of the dust passage pipe is threaded to a lower end of the dust collection channel, an outer diameter of the dust collection chamber as cylinder is d6=40-45 mm, and a diameter of mesh of the filter screen is d7=0.3-0.5 mm;
- the solenoid valve I is communicated with the air inlet channel of the imitation sandfish lizard dustproof chamber;
- the gas-sensitive sensor array is fixedly connected to the jack I, jack II, jack III and jack IV respectively of the sensing channel of the imitation sandfish lizard dustproof chamber;
- the air pump is communicated with a rear part of the sensing channel of the imitation sandfish lizard dustproof chamber;
- the dust collection box is communicated with a lower part of the dust collection channel in the imitation sandfish lizard dustproof chamber through the solenoid valve II;
- the single-chip microcomputer controller is connected with the solenoid valve I and the solenoid valve II through wires, the single-chip microcomputer controller is connected with the gas-sensitive sensor array and powered through the power supply, and a voltage signal transformation generated by the gas-sensitive sensor array is collected, recorded and stored through the analog-to-digital acquisition module.