Black carbon collecting and measuring device

Abstract

The utility model relates to the technical field of black carbon measurement, and discloses a black carbon collecting and measuring device, which comprises a rack, a measuring device, a collecting device and a measuring device, and is characterized in that the rack is coaxially provided with an accommodating hole; the pressing head is coaxially arranged above the rack and connected with a driving structure for driving the pressing head to ascend and descend, and a light source is arranged in the pressing head; an optical signal detection device; the belt disc assembly comprises a material discharging belt disc and a material receiving belt disc, the material discharging belt disc and the material receiving belt disc are arranged on the two sides of the rack respectively, and one end of the material receiving belt disc is in transmission connection with a rotation driving source for driving the material receiving belt disc to rotate; the grating detection device is arranged on one side, close to the material receiving tape reel, of the rack; and the glass fiber filter paper is wound on the discharging belt disc, and one end of the glass fiber filter paper passes through the space between the rack and the pressing head, sequentially passes through the first signal detection device, the second signal detection device and the grating detection device and then is wound on the receiving belt disc. According to the utility model, the carbon black can be continuously and stably collected and measured, and the measurement precision and reliability are obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to black carbon measurement technical field especially relates to a black carbon collection measuring device. BACKGROUND

[0002] Black carbon is an important component of aerosol, which is black carbonaceous particulate matter suspended in the atmosphere, and has strong absorption effect on visible light and infrared light. Black carbon aerosol is produced in the combustion process of carbon-containing substances. Any process involving the combustion of carbon-containing substances will cause the emission of black carbon aerosol, such as volcanic eruption, forest fire, and urban vehicle exhaust emission, combustion of coal and petroleum, etc. The carbon-containing component of aerosol in the air has a high content in aerosol, accounting for about 15%-20% in the total suspended particulate matter (TSP) mass concentration, about 25%-35% in PM10 mass concentration, and about 40%-60% in PM2.5 mass concentration. Black carbon aerosol has complex physical and chemical forms. Physically, it is in the form of submicron particles, which have strong absorption effect on 880nm light. The existing black carbon collection and measurement device has the problem of low measurement accuracy. This is because black carbon particles are usually very small and easy to disperse in the air, making it difficult to accurately collect and measure. At the same time, traditional collection methods may cause loss or contamination of black carbon samples, affecting the accuracy of measurement results. In addition, the optical properties of black carbon particles make it difficult to obtain comprehensive and accurate data with a single measurement method. Therefore, a black carbon collection and measurement device is developed. SUMMARY

[0003] In view of this, the purpose of the utility model is to provide a black carbon collection and measurement device to solve the problems pointed out in the background art.

[0004] In order to achieve the above-mentioned utility model purposes, the technical solutions adopted are as follows:

[0005] A black carbon collection and measurement device, comprising:

[0006] A rack, a receiving hole coaxially arranged on the rack;

[0007] A pressure head coaxially arranged in the receiving hole and connected with a driving structure for driving its lifting, and a light source built-in on the pressure head;

[0008] A light signal detection device for detecting the light signal after passing through the glass fiber filter paper, the light signal detection device comprising a first signal detection device and a second signal detection device symmetrically arranged in the receiving hole, the detection ends of the first signal detection device and the second signal detection device facing the pressure head, and the height of the detection ends of the first signal detection device and the second signal detection device being lower than the height of the top of the rack;

[0009] The belt disc assembly comprises a feeding belt disc and a collecting belt disc, which are arranged on both sides of the frame respectively, and one end of the collecting belt disc is connected with a rotary driving source for driving the rotation of the collecting belt disc.

[0010] The grating detection device is arranged on the side of the frame close to the collecting belt disc.

[0011] The glass fiber filter paper is wound on the feeding belt disc, and one end of the glass fiber filter paper passes between the frame and the pressure head and is wound on the collecting belt disc in sequence through the first signal detection device, the second signal detection device and the grating detection device.

[0012] As a further improvement of the utility model, one rotating wheel for guiding the glass fiber filter paper is arranged on each side of the frame, which can ensure the stability and flatness of the glass fiber filter paper during transmission. This helps to improve the position accuracy of the filter paper when passing through the detection device, thereby improving the accuracy of black carbon collection and measurement. At the same time, the guiding rotating wheel can reduce the tension change of the filter paper during transmission, reduce the risk of filter paper damage and prolong the service life of the filter paper.

[0013] As a further improvement of the utility model, the light source comprises LED lamps that can emit wavelengths of 365nm, 465nm, 520nm, 590nm, 660nm, 880nm and 940nm.

[0014] As a further improvement of the utility model, the gas supply device is connected to the pressure head through a pipeline, and the pressure head is provided with an air outlet corresponding to the detection head. The first signal detection device and the second signal detection device are each provided with a circular hole at the upper end. The gas supply device is used to drive the airflow to pass through the glass fiber filter paper, the circular hole at the upper end of the first signal detection device and the circular hole at the upper end of the second signal detection device in sequence. During sampling, the air pump can generate a slight positive pressure or negative pressure. When the positive pressure is generated, it can help to uniformly distribute the black carbon particles on the filter paper; when the negative pressure is generated, it can increase the sampling efficiency and attract more black carbon particles to the filter paper. This design can improve the efficiency and uniformity of sampling, thereby improving the accuracy of measurement.

[0015] As a further improvement of the utility model, the gas supply device is an air pump.

[0016] The utility model discloses a kind of black carbon collection and measurement devices, which can continuously and stably carry out black carbon collection and measurement, significantly improve the precision and reliability of measurement, sampling and measurement are in the same channel, the position of filter membrane is unchanged before and after sampling, eliminate the influence of the non-uniformity of filter membrane on measurement result, and there is no return error. Using the optical method of black carbon light absorption characteristics, the mass concentration of black carbon particulate matter can be quickly and accurately obtained. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0019] Fig. 2 This is a partial structural schematic diagram of the present invention.

[0020] In the diagram: 1. Frame, 2. Press head, 3. First signal detection device, 4. Second signal detection device, 5. Feeding reel, 6. Receiving reel, 7. Grating detection device, 8. Glass fiber filter paper, 9. Rotary wheel, 10. Circular hole. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] like Figs. 1-2 As shown, a black carbon collection and measurement device includes:

[0024] Frame 1, wherein a receiving hole is coaxially provided on the frame 1;

[0025] The pressure head 2 is coaxially disposed in the receiving hole and connected to a drive structure for driving its lifting and lowering, and the pressure head 2 has a built-in light source.

[0026] A light signal detection device for detecting light signals after passing through glass fiber filter paper 8, the light signal detection device includes a first signal detection device 3 and a second signal detection device 4 symmetrically arranged in the receiving hole, the detection ends of the first signal detection device 3 and the second signal detection device 4 facing the pressure head 2, and the height of the detection ends of the first signal detection device 3 and the second signal detection device 4 is lower than the height of the top of the frame 1.

[0027] A tape reel assembly includes a feed reel 5 and a take-up reel 6, which are respectively arranged on both sides of the frame 1, and one end of the take-up reel 6 is drivingly connected with a rotary driving source (not shown in the figure) for driving the take-up reel 6 to rotate;

[0028] A grating detection device 7 is arranged on the side of the frame 1 close to the take-up reel 6;

[0029] A glass fiber filter paper 8 is wound on the feed reel 5, and one end of the glass fiber filter paper 8 passes between the frame 1 and the pressure head 2 and is wound on the take-up reel 6 in sequence through the first signal detection device 3, the second signal detection device 4 and the grating detection device 7.

[0030] A rotating wheel 9 for guiding the glass fiber filter paper 8 is arranged on each side of the frame 1, which can ensure the stability and flatness of the glass fiber filter paper 8 during transmission. This helps to improve the position accuracy of the filter paper when passing through the detection device, thereby improving the accuracy of black carbon collection and measurement. At the same time, the guiding rotating wheel 9 can reduce the tension change of the filter paper during transmission, reduce the risk of filter paper damage, and prolong the service life of the filter paper.

[0031] The light source includes an LED lamp that can emit wavelengths of 365nm, 465nm, 520nm, 590nm, 660nm, 880nm and 940nm.

[0032] The gas supply device (not shown in the figure) is connected to the pressure head 2 through a pipeline, and the pressure head 2 is provided with an air outlet corresponding to the detection head. The first signal detection device 3 and the second signal detection device 4 are each provided with a circular hole 10. The gas supply device is used to drive the airflow to pass through the glass fiber filter paper 8, the circular hole 10 on the upper end of the first signal detection device 3 and the second signal detection device 4 in sequence. During sampling, the air pump can generate a slight positive pressure or negative pressure. When positive pressure is generated, it can help to evenly distribute black carbon particles on the filter paper; when negative pressure is generated, it can increase the sampling efficiency and attract more black carbon particles to the filter paper. This design can improve the efficiency and uniformity of sampling, thereby improving the accuracy of measurement.

[0033] The gas supply device is an air pump.

[0034] In use, the operation is as follows:

[0035] 1. First, install the glass fiber filter paper 8 on the feed reel 5, and pass one end thereof between the frame 1 and the pressure head 2, in sequence through the first signal detection device 3, the second signal detection device 4 and the grating detection device 7, and finally fix it on the take-up reel 6.

[0036] 2. The start-up device, the light source on the pressure head 2 is turned on, providing stable light conditions.

[0037] 3. The pressure head 2 is lowered to the appropriate height under the control of the drive structure, maintaining the appropriate distance from the filter paper.

[0038] 4. The sampling process begins, and the black carbon particles in the air are captured by the glass fiber filter paper 8.

[0039] 5. The first and second signal detection devices 4 simultaneously perform optical detection on the black carbon particles on the filter paper, obtaining preliminary data

[0040] 6. The filter paper continues to move through the grating detection device 7, obtaining additional measurement data.

[0041] 7. The collection belt reel 6 continues to rotate, ensuring the continuous movement of the filter paper and the supply of a fresh sampling surface.

[0042] 8. Throughout the process, the height of the pressure head 2 can be adjusted as needed to accommodate different sampling requirements.

[0043] 9. After the measurement is complete, the data from multiple detection devices is analyzed and processed, resulting in more accurate and comprehensive information on black carbon concentration and characteristics.

[0044] The above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, component disassembly or combination, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A black charcoal collection and measurement device, characterized in that, include: A frame, wherein a receiving hole is coaxially provided on the frame; The pressure head is coaxially disposed in the receiving hole and connected to a drive structure for driving its lifting and lowering, and the pressure head has a built-in light source. An optical signal detection device, comprising a first signal detection device and a second signal detection device symmetrically arranged in the receiving hole, wherein the detection ends of the first signal detection device and the second signal detection device face the pressure head, and the height of the detection ends of the first signal detection device and the second signal detection device is lower than the height of the top of the frame. The tape reel assembly includes a feeding tape reel and a take-up tape reel, which are respectively disposed on both sides of the frame, and one end of the take-up tape reel is connected to a rotary drive source for driving the take-up tape reel to rotate. A grating detection device is disposed on the side of the frame near the take-up reel; Glass fiber filter paper is wound on the feed reel, and one end of the glass fiber filter paper passes between the frame and the pressure head and then passes through the first signal detection device, the second signal detection device and the grating detection device in sequence before being wound onto the take-up reel.

2. The black carbon collection and measurement device according to claim 1, characterized in that: The frame has a rotating wheel on each side for guiding the glass fiber filter paper.

3. The black carbon collection and measurement device according to claim 1, characterized in that: The light source includes LEDs capable of emitting wavelengths of 365nm, 465nm, 520nm, 590nm, 660nm, 880nm, and 940nm.

4. The black carbon collection and measurement device according to claim 1, characterized in that: It also includes an air supply device, the output end of which is connected to the pressure head through a pipe. The pressure head is provided with an air outlet corresponding to the detection head. The first signal detection device and the second signal detection device are both provided with round holes at their upper ends.

5. The black charcoal collection and measurement device according to claim 4, characterized in that: The gas supply device is an air pump.

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