In-place heat regeneration pollutant emission testing method

Abstract

The invention discloses an in-place heat regeneration pollutant emission testing method, which adopts a mode of combining fixing and moving, at least five groups of pollutant emission testing devices are arranged, one group of pollutant emission testing device is fixedly arranged right ahead of the construction direction of in-place heat regeneration complete equipment, and the other group of pollutant emission testing device is arranged right ahead of the construction direction of the in-place heat regeneration complete equipment. Wherein the hot in-place recycling complete device comprises a plurality of pavement heating machines, a heating milling machine, a temperature raising machine, a remixer and a paver; and the other four groups of pollutant emission testing devices are respectively assembled on the rearmost pavement heating machine, the heating milling machine, the temperature raising machine and the remixer. According to the invention, quantitative indexes of the height and width of the in-place heat regeneration working domain are defined, pollution generated during in-place heat regeneration working can be tested, and a result obtained by the test can be fed back to the in-place heat regeneration complete equipment, so that adjustment of heat output is realized, and emission indexes of pollutants are controlled and reduced in turn; valuable references are provided for formulating hot in-place recycling environmental protection standards and detecting and controlling the environmental protection performance of products.

Description

Technical Field

[0001] The present invention belongs to the technical field of road maintenance equipment, and particularly relates to a method for testing pollutant emissions during in-situ hot recycling. Background Art

[0002] In-situ hot recycling of asphalt pavement is one of the pavement recycling processes. It heats, loosens the pavement, and then mixes in a certain proportion of new aggregates, new asphalt, recycling agents, etc. Through processes such as mixing, paving, and rolling, it can renovate the old asphalt pavement within a certain depth range of the surface at one time. It has the advantages of short maintenance and opening cycles and little traffic impact, meeting the requirements of rapid maintenance of modern roads, especially highways and municipal roads.

[0003] Existing in-situ hot recycling complete sets of equipment on the market usually consist of 3 - 4 pavement heating machines, 1 heating milling machine, 1 feeder, 1 remixing machine, and a paver, etc. There are varying degrees of toxic dust emissions in the processes of asphalt pavement heating, loosening, mixture temperature increase, remixing, etc. Especially in the pavement heating process, heating methods such as fuel open fire, gas infrared rays, or rough hot air circulation are used, which easily lead to aging and coking of the surface asphalt, accompanied by unorganized emissions of harmful gases such as PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, and nitrogen oxides. At the same time, a large amount of heat overflows during in-situ hot recycling work, causing the surrounding green vegetation during construction to be scorched and die, and posing a hazard to construction workers. Currently, the industry lacks sampling methods for mobile pollution sources during in-situ hot recycling and related testing methods, and cannot meet the requirements of safe maintenance and high-standard and high-quality maintenance of modern asphalt pavements (especially highways and municipal roads). Summary of the Invention

[0004] The purpose of the present invention is to provide a method for testing pollutant emissions during in-situ hot recycling, clarify the quantitative indicators of the height and width of the working boundary of in-situ hot recycling, be able to test the pollution generated during in-situ hot recycling work, and the test results can be fed back to the in-situ hot recycling complete set of equipment to adjust the heat output, and in turn control and reduce the pollutant emission indicators, providing valuable references for the formulation of environmental protection standards for in-situ hot recycling, the detection and control of the environmental protection performance of products.

[0005] To achieve the above purpose, the present invention provides a method for testing pollutant emissions during in-situ hot recycling, which adopts a combination of fixed and mobile methods, and at least sets 5 groups of pollutant emission testing devices. One group of pollutant emission testing devices is fixedly placed directly in front of the construction direction of the in-situ hot recycling complete set of equipment, and the in-situ hot recycling complete set of equipment includes several pavement heating machines, heating milling machines, temperature increasing machines, remixing machines, and pavers; the other 4 groups of pollutant emission testing devices are respectively assembled on the last pavement heating machine, heating milling machine, temperature increasing machine, and remixing machine.

[0006] As a further solution of the present invention: The working domain boundary involved in the test includes the interface space and the asphalt pavement covering the in-situ thermal regeneration equipment set. The interface space and the asphalt pavement are enclosed and matched to form a closed three-dimensional space boundary. The height of this three-dimensional space boundary is 4000 - 4200 mm, and the width is 4200 - 5000 mm.

[0007] As a further solution of the present invention: The overall shape of the pollutant emission test device coincides with the working domain boundary, and it is equipped with a radiant heat test frame and a variety of pollutant test instruments.

[0008] As a further solution of the present invention: The fixed sampling test method for pollutant emissions is as follows: a) Conduct on-site investigation to determine the wind direction, and place the collection instruments for PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, and nitrogen oxides pollutants on the downwind side of a set of pollutant emission test devices. b) Place the radiant heat test frame on the downwind side of the pollutant emission test device, and arrange each radiant heat temperature sensor at each grid intersection point to ensure that the height of each radiant heat temperature sensor from the ground is fully covered at 100 - 3000 mm. c) After the operation speed of the in-situ thermal regeneration equipment set is stable, move the pollutant emission test device equipped with pollutant collection instruments and a radiant heat test frame to the front of the in-situ thermal regeneration equipment set and place it statically. d) Adjust the installation height of each pollutant collection instrument according to the position of the pollutant emission concentration during the operation process. e) The in-situ thermal regeneration equipment set enters the fixed-point sampling area to start sampling. After the whole in-situ thermal regeneration equipment set passes through the fixed-point sampling area, continue to move forward for 10 m and then end the sampling. Save the data of each fixed sampling sample and the radiant heat temperature sensor.

[0009] As a further solution of the present invention: The mobile sampling test method for pollutant emissions is as follows: a) Conduct on-site investigation to determine the wind direction. In advance, assemble 4 sets of pollutant emission test devices on the last pavement heating machine, heating milling machine, temperature raising machine, and remixing machine respectively, and place 4 sets of radiant heat test frames on the downwind side of the 4 sets of pollutant emission test devices respectively. b) After the operation speed of the in-situ thermal regeneration equipment set is stable, place the collection instruments for PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, and nitrogen oxides pollutants on the downwind side of the 4 sets of pollutant emission test devices respectively, and adjust the installation height of each pollutant collection instrument (8) according to the position of the pollutant emission concentration during the operation process. c) Install each radiant heat temperature sensor at the intersection of each grid of the 4 groups of radiant heat test frames, ensuring that the height of each radiant heat temperature sensor from the ground is fully covered from 100 - 3000 mm; d) Start the mobile sampling of pollutants. After the in-situ thermal regeneration equipment moves forward for a construction length of not less than 200 m or the sampling time is not less than 1 h, end the sampling and save the data of each sample of the mobile sampling and the radiant heat temperature sensor.

[0010] As a further solution of the present invention: The test environment and site conditions need to meet: 1) Non-rainy days, wind speed not greater than 8 m / s; 2) Ambient temperature: 15 °C - 35 °C; 3) The test site is a flat and solid asphalt road surface with intact roadbed and the length of the surface damage should not be greater than 60 mm. The site width is greater than the maximum heating width of the prototype, and the length is not less than 1000 m; 4) There are no tall buildings blocking within 10 m on both sides of the working direction of the prototype.

[0011] As a further solution of the present invention: The working state of the in-situ thermal regeneration equipment needs to meet: The regeneration depth of the in-situ thermal regeneration equipment should not be less than 4 cm, and the construction speed should not be less than 2 m / min.

[0012] As a further solution of the present invention: The measured value of each pollutant takes the highest value of the fixed sampling and mobile sampling concentrations.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The proposal of the in-situ thermal regeneration working boundary defines the quantitative indicators of the height and width of the working boundary; Through multiple groups of pollutant test brackets, the tests of harmful gases such as PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, nitrogen oxides, etc. can be completed; at the same time, the layout of the radiant heat temperature sensors is also considered; it can test the pollution generated during the in-situ thermal regeneration work, provide data support for environmental protection governance, and provide valuable references for the formulation of in-situ thermal regeneration environmental protection standards, the detection and control of product environmental protection performance; The results obtained from the test can be fed back to the in-situ thermal regeneration equipment to adjust the heat output, and in turn control and reduce the pollutant emission index; It has the dual functions of fixed sampling of pollutants and mobile sampling following the machine, with a clever structural design and high promotion value. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the in-situ thermal regeneration working boundary of the present invention; Figure 2 is the front view of the pollutant emission test device of the present invention; Figure 3 is the three-dimensional view of the pollutant emission test device of the present invention; Figure 4 is the explosion diagram of the pollutant emission test device of the present invention; Figure 5 is the side frame structure diagram of the pollutant emission test device of the present invention; Figure 6 is the top frame structure diagram of the pollutant emission test device of the present invention; Figure 7 is the connection schematic diagram of the pollutant emission test device of the present invention and the in-situ thermal regeneration sleeve equipment through the connection seat; Figure 8 is the installation schematic diagram of the pollutant test bracket of the pollutant emission test device of the present invention; Figure 9 is the installation schematic diagram of the radiant heat test frame of the pollutant emission test device of the present invention; Figure 10 is the structure schematic diagram of the pollutant emission test device of the present invention assembled on the in-situ thermal regeneration sleeve equipment.

[0015] Figure 11 is the working scene diagram of the in-situ thermal regeneration sleeve equipment.

[0016] In the figure: 1. Side frame, 1-1. Column, 1-1-1. Card slot, 1-1-2. Hook, 1-2. Folding grid Ⅰ, 1-3. Spiral rigging link Ⅰ, 2. Top frame, 2-1. Telescopic cross bar, 2-2. Folding grid Ⅱ, 2-3. Spiral rigging link Ⅱ, 3. Pollutant test bracket, 4. Radiant heat test frame, 5. Connection seat, 6. Caster, 7. Heating device body, 8. Pollutant test instrument; H. Height of the in-situ thermal regeneration working boundary, W. Width of the in-situ thermal regeneration working boundary, R. Radius of the top rounded corner of the inverted U-shaped virtual interface; h. Overall height of the radiant heat test frame, A. Clearance between the radiant heat test frame and the ground, d. Spacing between adjacent mesh intersection points of the radiant heat test frame. Detailed implementation manners

[0017] The present invention will be further described below through embodiments.

[0018] Such as Figure 1As shown in the figure, a working boundary for in-situ hot recycling is provided. The working boundary involved in the test includes the interface space and the asphalt pavement that encompass the in-situ hot recycling equipment set. The interface space is preferably of an inverted U-shaped structure. The top rounded corner of the inverted U-shaped virtual interface is 500 - 1000 mm. The interface space and the asphalt pavement are closely fitted to form a closed three-dimensional space boundary. The height of this three-dimensional space boundary is 4000 - 4200 mm, and the width is 4200 - 5000 mm. The working boundary sets standards for the pollutant emission testing device, establishes profiling simulation points, and during the construction test, the pollutant emission testing device profiles the working boundary to collect pollutant indicators of the working boundary.

[0019] As Figure 11 shown in the figure, an in-situ hot recycling pollutant emission testing method is as follows: By combining fixed and mobile methods, at least 5 sets of pollutant emission testing devices are set up. One set of pollutant emission testing devices is fixedly placed directly in front of the construction direction of the in-situ hot recycling equipment set. The in-situ hot recycling equipment set includes several pavement heating machines, heating and milling machines, temperature raising machines, remixing machines, and pavers. Preferably, the in-situ hot recycling equipment set includes 3 - 4 pavement heating machines, 1 heating and milling machine, 1 temperature raising machine, 1 remixing machine, and 1 paver; the other 4 sets of pollutant emission testing devices are respectively assembled on the last pavement heating machine, heating and milling machine, temperature raising machine, and remixing machine.

[0020] As Figures 2 to 4 and Figure 7 、 Figure 10 shown in the figure, the overall shape of the used pollutant emission testing device fits well with the in-situ hot recycling working boundary, and it includes a lateral frame 1, a top frame 2, a pollutant testing support 3, a radiant heat testing frame 4, a connecting seat 5, and casters 6; There are two groups of lateral frames 1, which are arranged symmetrically left and right, and are inserted into the upper and lower pipe fittings of the top frame 2 to form an inverted U-shaped three-dimensional frame; There are two groups of connecting seats 5, which are arranged symmetrically left and right. The inverted U-shaped three-dimensional frame is detachably connected to any heating device body 7 of the in-situ hot recycling equipment set through the connecting seat 5; to realize mobile sampling and testing of pollutant emissions by the pollutant emission testing device as the vehicle moves; the pollutant emission testing device can also disconnect the connection between the connecting seat 5 and the in-situ hot recycling equipment set and be fixedly placed on the regeneration lane, and the in-situ hot recycling equipment set drives through the inverted U-shaped three-dimensional frame one by one to realize fixed sampling and testing of pollutants; There are multiple groups of pollutant testing supports 3, which are erected on the outside of the lateral frame 1 for placing various pollutant testing instruments 8; There are two groups of radiant heat testing frames 4, which are symmetrically distributed left and right and are respectively suspended inside the lateral frame 1; There are multiple groups of casters 6, which are connected and distributed at the bottom of the lateral frame 1, Figure 3 and Figure 4There are four sets of casters 6 shown, which are respectively connected to the bottoms of both ends of the lateral frame 1.

[0021] Furthermore, as Figure 5 shown, the lateral frame 1 includes columns 1-1, folding grid I 1-2 and wire rope link I 1-3; There are multiple sets of columns 1-1, all arranged vertically and distributed parallel to each other at intervals; There is at least one set of folding grid I 1-2, and its cross-connection points are pin-connected to each set of columns 1-1. The distance between each pair of columns 1-1 changes with the length change of the folding grid I 1-2; The length of the wire rope link I 1-3 is adjustable, and its two ends are respectively fixedly connected to the middle two sets of columns 1-1. The length of the folding grid I 1-2 changes with the length change of the wire rope link I 1-3.

[0022] Figure 5 As shown in, there are two sets of folding grid I 1-2, distributed in upper and lower layers. The wire rope link I 1-3 is arranged between the two sets of folding grid I 1-2. The length change of the wire rope link I 1-3 drives the length change of the folding grid I 1-2, thereby adjusting the distance between each pair of columns 1-1 and realizing the adjustment of the length of the entire lateral frame 1.

[0023] Furthermore, as Figure 6 shown, the top frame 2 includes telescopic crossbars 2-1, folding grid II 2-2 and wire rope link II 2-3; There are multiple sets of telescopic crossbars 2-1, all arranged horizontally and distributed parallel to each other at intervals; There is at least one set of folding grid II 2-2, and its cross-connection points are pin-connected to each set of telescopic crossbars 2-1. The distance between each pair of telescopic crossbars 2-1 changes with the length change of the folding grid II 2-2; The length of the wire rope link II 2-3 is adjustable, and its two ends are respectively fixedly connected to the middle two sets of telescopic crossbars 2-1. The length of the folding grid II 2-2 changes with the length change of the wire rope link II 2-3, realizing the adjustment of the length of the entire top frame 2.

[0024] Figure 6 As shown in, there are two sets of folding grid II 2-2, symmetrically distributed. The wire rope link II 2-3 is arranged between the two sets of folding grid II 2-2. The length change of the wire rope link II 2-3 drives the length change of the folding grid II 2-2, thereby adjusting the distance between each pair of telescopic crossbars 2-1.

[0025] To facilitate the disassembly and assembly of the testing instruments for harmful gases such as PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, and nitrogen oxides, the height positions of the pollutant testing brackets 3 are adjustable, enhancing the adaptability to sampling and testing conditions. Furthermore, as Figure 8 and Figure 9As shown in the figure, on the end faces of all the upright columns 1-1, there are card slots 1-1-1 with different heights for connecting the pollutant test bracket 3, enabling the quick disassembly and height adjustment of the pollutant test bracket 3. On the inner top of all the upright columns 1-1, there are hooks 1-1-2 for hanging the radiant heat test frame 4, and corresponding round holes for hanging on the hooks 1-1-2 are provided on the radiant heat test frame 4.

[0026] To take into account the layout of the radiant heat temperature sensors, further, the radiant heat test frame 4 is a mesh structure. Each mesh intersection point is used to fix the radiant heat temperature sensor, and the distance between adjacent mesh intersection points is not greater than 150 mm. The overall height of the radiant heat test frame 4 is not less than 3000 mm, and the clearance from the ground after assembly is not greater than 100 mm.

[0027] The method for fixed sampling and testing of pollutant emissions is as follows: a) Conduct on-site investigation to determine the wind direction, and place the pollutant collection instruments for PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, nitrogen oxides, etc. on the downwind side of one set of pollutant emission test devices. b) Place the radiant heat test frame 4 on the downwind side of the pollutant emission test device, and arrange each radiant heat temperature sensor at each grid intersection point to ensure that the height of each radiant heat temperature sensor from the ground is fully covered from 100 - 3000 mm. c) After the operation speed of the in-situ thermal regeneration equipment set stabilizes, move the pollutant emission test device equipped with the pollutant collection instrument and the radiant heat test frame 4 to the front of the in-situ thermal regeneration equipment set and let it stand still. d) Adjust the installation height of each pollutant collection instrument according to the position of the pollutant emission concentration during the operation process. e) The in-situ thermal regeneration equipment set enters the fixed-point sampling area to start sampling. After the in-situ thermal regeneration equipment set as a whole passes through the fixed-point sampling area, continue to move forward for 10 m and then end the sampling, and save the data of each fixed sampling sample and the temperature sensor.

[0028] The method for mobile sampling and testing of pollutant emissions is as follows: a) Conduct on-site investigation to determine the wind direction. In advance, assemble four sets of pollutant emission test devices on the last pavement heating machine, heating milling machine, temperature raising machine, and remixing machine respectively, and place four sets of radiant heat test frames 4 on the downwind side of the four sets of pollutant emission test devices respectively. b) After the operation speed of the in-situ thermal regeneration equipment set stabilizes, place the pollutant collection instruments for PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, nitrogen oxides, etc. on the downwind side of the four sets of pollutant emission test devices respectively, and adjust the installation height of each pollutant collection instrument according to the position of the pollutant emission concentration during the operation process. c) Install each temperature sensor at the intersection of each grid of the 4 sets of radiant heat test frames 4, ensuring that the height of each temperature sensor from the ground is fully covered from 100 to 3000 mm; d) Start the pollutant mobile sampling. After the in-situ thermal regeneration set of equipment moves forward for a construction length of not less than 200 m or the sampling time is not less than 1 h, end the sampling and save the data of each sample and temperature sensor during the mobile sampling.

[0029] The determination of each pollutant shall be carried out in accordance with the following standards: a) PM10 particulate matter shall be carried out in accordance with the provisions of HJ 618; b) SO2 shall be carried out in accordance with the provisions of HJ 482; c) Benzo[a]pyrene shall be carried out in accordance with the provisions of HJ 956; d) Nitrogen oxides shall be carried out in accordance with the provisions of HJ 479; e) For asphalt fume, test instruments such as a TSP total suspended particulate sampler, a Soxhlet extractor and a filter membrane are used. A medium-flow sampler is used for sampling, and the filter membrane is an ultra-fine glass or quartz fiber filter membrane; when sampling, use non-toothed tweezers to place the filter membrane in a clean filter membrane clip, with the hairy side of the filter membrane facing the air inlet direction, firmly press the filter membrane, and place the filter membrane clip in the sampler; after sampling, use tweezers to take out the filter membrane, fold the filter membrane in half with the dust side facing inwards, dry the filter membrane in the dark, and store it sealed.

[0030] Furthermore, the test environment and site conditions need to meet: 1) non-rainy days, wind speed not greater than 8 m / s; 2) ambient temperature: 15 °C to 35 °C; 3) the test site is a flat and solid asphalt pavement with intact roadbed and the length of the surface damage not greater than 60 mm, the site width is greater than the maximum heating width of the prototype, and the length is not less than 1000 m; (4) there are no tall buildings blocking within 10 m on both sides of the working direction of the prototype.

[0031] Furthermore, the working state of the in-situ thermal regeneration set of equipment needs to meet: the regeneration depth of the in-situ thermal regeneration set of equipment is not less than 4 cm, the construction speed is not less than 2 m / min, and the road surface temperature and the temperature of the exposed surface after loosening during the operation process should meet the provisions of JTG / T5521.

[0032] Furthermore, the measured value of each pollutant shall be the highest value of the concentrations at the fixed sampling point and the mobile sampling point.

Claims

1. An in-situ thermal regeneration pollutant emission test method, characterized in that, Adopt a combination of fixed and mobile methods, and set at least 5 sets of pollutant emission testing devices. One set of pollutant emission testing devices is fixedly placed directly in front of the construction direction of the in-situ thermal regeneration equipment set. The in-situ thermal regeneration equipment set includes several road surface heating machines, heating milling machines, temperature raising machines, remixing machines, and pavers; the other 4 sets of pollutant emission testing devices are respectively assembled on the last road surface heating machine, heating milling machine, temperature raising machine, and remixing machine.

2. The in-situ thermal regeneration pollutant emission test method according to claim 1, wherein The working domain boundary involved in the test includes the interface space and the asphalt road surface covered by the in-situ thermal regeneration equipment set. The interface space and the asphalt road surface are enclosed and matched to form a closed three-dimensional space boundary. The height of this three-dimensional space boundary is 4000 - 4200 mm, and the width is 4200 - 5000 mm.

3. The in-situ thermal regeneration pollutant emission test method according to claim 2, characterized in that The overall shape of the pollutant emission testing device fits the working domain boundary, and it is equipped with a radiant heat testing frame (4) and various pollutant testing instruments (8).

4. The in-situ thermal regeneration pollutant emission test method according to claim 3, characterized in that, The fixed sampling test method for pollutant emissions is as follows: a) Conduct on-site inspection to determine the wind direction, and place the PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, and nitrogen oxide pollutant collection instruments (8) on the downwind side of one set of pollutant emission testing devices. b) Place the radiant heat testing frame (4) on the downwind side of the pollutant emission testing device, and arrange each radiant heat temperature measurement sensor at each grid intersection point to ensure that the height of each radiant heat temperature measurement sensor from the ground is fully covered from 100 - 3000 mm. c) After the operation speed of the in-situ thermal regeneration equipment set is stable, move the pollutant emission testing device equipped with the pollutant collection instrument (8) and the radiant heat testing frame (4) to the front of the in-situ thermal regeneration equipment set and let it stand still. d) Adjust the installation height of each pollutant collection instrument (8) according to the position of the pollutant emission concentration during the operation process. e) The in-situ thermal regeneration equipment set enters the fixed-point sampling area to start sampling. After the entire in-situ thermal regeneration equipment set passes through the fixed-point sampling area, it continues to move forward for 10 m and then ends sampling. Save the data of each fixed sampling sample and the radiant heat temperature measurement sensor.

5. A method for testing in-situ thermal regeneration pollutant emissions according to claim 3 or 4, characterized in that, The mobile sampling test method for pollutant emissions is as follows: a) Conduct on-site inspection to determine the wind direction. In advance, assemble 4 sets of pollutant emission testing devices on the last road surface heating machine, heating milling machine, temperature raising machine, and remixing machine respectively, and place 4 sets of radiant heat testing frames (4) on the downwind side of the 4 sets of pollutant emission testing devices respectively. b) After the operation speed of the in-situ thermal regeneration equipment set is stable, place the PM10 particulate matter, SO2, benzo[a]pyrene, asphalt fume, and nitrogen oxide pollutant collection instruments (8) on the downwind side of the 4 sets of pollutant emission testing devices respectively, and adjust the installation height of each pollutant collection instrument (8) according to the position of the pollutant emission concentration during the operation process. c) Arrange each radiant heat temperature measurement sensor at each grid intersection point of the 4 sets of radiant heat testing frames (4) to ensure that the height of each radiant heat temperature measurement sensor from the ground is fully covered from 100 - 3000 mm. d) Start the pollutant movement sampling. After the in-situ thermal regeneration equipment moves forward for a construction length of not less than 200 m or a sampling time of not less than 1 h, end the sampling, and save the data of each sample in the movement sampling and the radiation heat temperature measurement sensor.

6. The in-situ thermal regeneration pollutant emission test method according to claim 5, characterized in that The test environment and site conditions shall meet the following requirements: 1) Non-rainy days, wind speed not greater than 8 m / s; 2) Ambient temperature: 15 °C to 35 °C; 3) The test site is a flat and solid asphalt pavement with intact subgrade and the length of surface damage not greater than 60 mm. The site width is greater than the maximum heating width of the prototype, and the length is not less than 1000 m; 4) There are no tall buildings within 10 m on both sides of the working direction of the prototype.

7. The in-situ thermal regeneration pollutant emission test method according to claim 5, characterized in that The working state of the in-situ thermal regeneration equipment shall meet the following requirements: The regeneration depth of the in-situ thermal regeneration equipment shall not be less than 4 cm, and the construction speed shall not be less than 2 m / min.

8. A method for testing in-situ thermal regeneration pollutant emissions according to claim 5, characterized in that, The measured value of each pollutant is the highest value of the fixed sampling and the movement sampling concentration.

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