A device for collecting emissions from an asphalt mixture during mixing

Abstract

The utility model discloses a collection testing device of asphalt mixture smoke in the mixing process, it includes the smoke enrichment outer cover for the mixing pot top of automatic asphalt mixture mixing machine, the smoke enrichment outer cover with automatic asphalt mixture mixing machine's elevating mixing arm fixed connection, the top of smoke enrichment outer cover is provided with two connecting holes, and one connecting hole is connected with gas sampling equipment through smoke flow guide pipeline, and another connecting hole is connected with the air -pumping pump through the air -pumping pipeline, and is installed with PTFE filter membrane box no.

Description

Technical Field

[0001] This utility model relates to the technical field of asphalt fume collection and testing devices, specifically a device for collecting and testing fume generated during the mixing process of asphalt mixtures. Background Technology

[0002] During the mixing stage, asphalt mixtures release a large amount of harmful gases and solid particulate matter, collectively known as asphalt fumes. These fumes not only pollute the ecological environment but also harm human health. To minimize the adverse effects of asphalt fumes and promote the rapid development of green transportation, effective detection and evaluation of fumes from the production process is one of the key technologies. Currently, there are no unified methods or standards for the enrichment of fumes from asphalt mixtures during the mixing process, both domestically and internationally. On-site enrichment and laboratory enrichment are commonly used. Some self-developed collection devices exist, but most focus on collecting and analyzing solid particulate matter in fumes under closed, oxygen-free conditions. However, in engineering projects, asphalt reacts with flowing air, leading to oxidation, which is inconsistent with reality. Furthermore, existing equipment does not collect and analyze solid particulate matter in fumes by particle size.

[0003] Therefore, it is necessary to design an asphalt fume collection and testing device that conforms to the release characteristics of asphalt mixture flue gas under actual working conditions, and realizes the graded collection and analysis of solid particulate matter in the flue gas released during the mixing process of asphalt mixture, as well as the composition and concentration of the flue gas. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a device for collecting and testing the fumes generated during the mixing process of asphalt mixtures. This device has the advantages of simple installation, low manufacturing cost, and easy operation. It can enrich the fumes generated during the mixing process of asphalt mixtures, thereby effectively collecting and analyzing the asphalt fumes.

[0005] This utility model is achieved using the following technical solution:

[0006] A testing device for collecting fumes generated during the mixing process of asphalt mixtures includes a fume enrichment hood for sealing the top of the mixing pot of an automatic asphalt mixture mixing machine. The fume enrichment hood collects the fumes discharged from the mixing pot of the automatic asphalt mixture mixing machine, preventing the fumes from spreading to the surrounding environment. The size and shape of the fume enrichment hood should be customized according to the specifications of the mixing pot to ensure effective collection of all fumes. The fume enrichment hood is fixedly connected to the lifting mixing arm of the automatic asphalt mixture mixing machine. The top of the fume enrichment hood is provided with two connection holes. One connection hole is connected to a gas sampling device through a fume guide pipe. The gas sampling device adopts existing mature gas sampling equipment, which is purchased and installed commercially. The other connection hole is connected to a suction pump through a suction pipe. PTFE filter membrane box one and PTFE filter membrane box two are installed on the suction pipe. PTFE filter membrane box one and PTFE filter membrane box two are installed in PTFE filter membrane box one and PTFE filter membrane box two respectively. The collected gases and solid particulate matter are analyzed using analytical instruments, including gas chromatographs (GC), mass spectrometers (MS), and portable VOCs detectors. The collected flue gas is analyzed to detect harmful gases (such as SOx, NOx, VOCs, etc.) and dust concentrations.

[0007] A further preferred embodiment: the flue gas enrichment hood is made of polytetrafluoroethylene.

[0008] A further preferred embodiment: the inner wall of the flue gas enrichment hood is coated with a heat insulation layer, which can effectively reduce heat loss, and is equipped with a flow guiding structure to optimize the path of flue gas into the flue gas flow guiding pipe.

[0009] Further preferred: the flue gas guiding pipe and the exhaust pipe are made of soluble polytetrafluoroethylene, which gives the pipes good high temperature resistance and corrosion resistance. The outer diameter of the pipe is the same as the size of the corresponding connection hole set on the top of the flue gas enrichment hood. The pipe connection is sealed with silicone tube.

[0010] Further preferred embodiments: the PTFE filter membrane one has a pore size of 0.22 μm; the PTFE filter membrane two has a pore size of 0.1 μm.

[0011] This asphalt mixture flue gas collection and testing device has the advantages of simple installation, low manufacturing cost, and easy operation. It closely matches the release characteristics of asphalt mixture flue gas under actual working conditions, effectively controlling the disorderly diffusion of flue gas and achieving flue gas enrichment. It can also achieve graded collection of solid particulate matter in the flue gas released during the asphalt mixture mixing process, which facilitates accurate analysis of flue gas composition and concentration, ensuring that emissions meet environmental protection standards. Attached Figure Description

[0012] Figure 1A schematic diagram of the installation structure of a testing device for collecting fumes generated during the mixing process of asphalt mixtures;

[0013] The component names corresponding to the serial numbers in the diagram are:

[0014] 1. Flue gas enrichment hood; 2. Exhaust duct; 3. PTFE filter membrane box one; 4. PTFE filter membrane one; 5. PTFE filter membrane box two; 6. PTFE filter membrane two; 7. Gas sampling equipment; 8. Exhaust pump; 9. Flue gas diversion duct; 10. Automatic asphalt mixing plant; 11. Lifting mixing arm; 12. Mixing pot. Detailed Implementation

[0015] The technical solutions of the invention will be clearly and completely described below with reference to the embodiments. The described embodiments are only a part of the present utility model, and not all of the embodiments. Example

[0016] A testing device for collecting fumes generated during the mixing process of asphalt mixtures includes a fume enrichment hood 1 for sealing the top of the mixing pot 12 of an automatic asphalt mixture mixing machine 10. The size and shape of the fume enrichment hood 1 should be customized according to the specifications of the mixing pot 12 to ensure effective collection of all fumes. The fume enrichment hood 1 is fixedly connected to the lifting mixing arm 11 of the automatic asphalt mixture mixing machine 10. The top of the fume enrichment hood 1 is provided with two connection holes. One connection hole is connected to a gas sampling device 7 through a fume guide pipe 9, or it can be directly connected to a portable VOCs detector. The other connection hole is connected to a suction pump 8 through a suction pipe 2. PTFE filter membrane box 1 3 and PTFE filter membrane box 2 5 are installed on the suction pipe 2. PTFE filter membrane box 1 4 and PTFE filter membrane box 2 6 are installed in PTFE filter membrane box 1 3 and PTFE filter membrane box 2 5 respectively.

[0017] The flue gas enrichment hood 1 is made of polytetrafluoroethylene.

[0018] The inner wall of the flue gas enrichment shroud 1 is coated with a heat insulation layer.

[0019] The flue gas guiding pipe 9 and the exhaust pipe 2 are made of soluble polytetrafluoroethylene. The outer diameter of the pipe is the same as the size of the corresponding connection hole set on the top of the flue gas enrichment hood 1. The pipe connection is sealed with silicone tube.

[0020] The PTFE filter membrane 4 has a pore size of 0.22 μm and is used to isolate and collect solid particles with a particle size greater than 0.22 μm.

[0021] The PTFE filter membrane 6 has a pore size of 0.1 μm and is used to isolate and collect solid particles with a particle size of 0.1 μm-0.22 μm.

[0022] The above description is not intended to limit the present utility model, nor is the present utility model limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A device for collecting and testing fumes generated during the mixing process of asphalt mixtures, characterized in that: The flue gas enrichment hood (1) is used to cover the top of the mixing pot (12) of the automatic asphalt mixing machine (10). The flue gas enrichment hood (1) is fixedly connected to the lifting mixing arm (11) of the automatic asphalt mixing machine (10). The top of the flue gas enrichment hood (1) is provided with two connection holes. One connection hole is connected to a gas sampling device (7) through a flue gas guide pipe (9). The other connection hole is connected to a suction pump (8) through a suction pipe (2). PTFE filter membrane box one (3) and PTFE filter membrane box two (5) are installed on the suction pipe (2). PTFE filter membrane one (4) and PTFE filter membrane two (6) are installed in PTFE filter membrane box one (3) and PTFE filter membrane box two (5) respectively.

2. The device for collecting and testing flue gas generated during the mixing process of asphalt mixtures according to claim 1, characterized in that: The flue gas enrichment hood (1) is made of polytetrafluoroethylene.

3. The device for collecting and testing flue gas generated during the mixing process of asphalt mixtures according to claim 1 or 2, characterized in that: The inner wall of the flue gas enrichment hood (1) is coated with a heat insulation layer.

4. The device for collecting and testing flue gas generated during the mixing process of asphalt mixtures according to claim 1, characterized in that: The flue gas guide pipe (9) and the exhaust pipe (2) are made of soluble polytetrafluoroethylene. The outer diameter of the pipe is the same as the size of the corresponding connection hole set on the top of the flue gas enrichment hood (1). The pipe connection is sealed with silicone tube.

5. The device for collecting and testing flue gas generated during the mixing process of asphalt mixtures according to claim 1, characterized in that: The PTFE filter membrane (4) has a pore size of 0.22 μm.

6. The device for collecting and testing flue gas generated during the mixing process of asphalt mixtures according to claim 1, characterized in that: The PTFE filter membrane 2 (6) has a pore size of 0.1 μm.

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