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Basic dataStandard ID: HJ 905-2017 (HJ905-2017)Description (Translated English): Technical specification for environmental monitoring of odor Sector / Industry: Environmental Protection Industry Standard Classification of Chinese Standard: Z15 Word Count Estimation: 16,181 Date of Issue: 2017-12-29 Date of Implementation: 2018-03-01 Regulation (derived from): Ministry of Environmental Protection Notice No. 87 of 2017 Issuing agency(ies): Ministry of Ecology and Environment HJ 905-2017: Technical specification for environmental monitoring of odor---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.People's Republic of China national environmental protection standards Technical specification for environmental monitoring of odor 2017-12-29 Posted 2018-03-01 implementation Directory Foreword ..ii 1 scope of application .1 2 Normative references .1 3 Terms and definitions4 Odor sampling points and sampling frequency 2 5 stench sampling method .3 6 sample pretreatment and analysis methods .5 7 Monitoring Results and Records .6 8 Quality Assurance and Quality Control 6 Appendix A (informative) Sampling facilities and auxiliary facilities Appendix B (informative) original record 11ForewordIn order to carry out "Law of the People's Republic of China on Environmental Protection" and "Law of the People's Republic of China on Prevention and Control of Atmospheric Pollution", strengthen the air Pollution prevention and control, protection and improvement of ecological environment, protection of human health, regulate the monitoring of odor pollution, the development of this standard. This standard specifies the environmental air and various types of malodorous sources of pollution (including water) discharged in different forms of odor pollution monitoring Measuring point layout, sample collection and processing, laboratory analysis, data processing, quality assurance and so on. This standard Appendix A and Appendix B is an informative annex. This standard is released for the first time. This standard by the Environmental Protection Department of Environmental Monitoring Division and Science and Technology Standards Division to develop. This standard was drafted. China Environmental Monitoring Station, Tianjin Environmental Monitoring Center This standard MEP approved on December 29,.2017. This standard since March 1,.2018 into effect. This standard is interpreted by the MEP. Fetid odor pollution monitoring technical specifications1 scope of applicationThis standard specifies the environmental air and various types of malodorous sources of pollution (including water) discharged in different forms of odor pollution monitoring Measuring technology. This standard applies to the use of laboratory analysis of ambient air, organized sources and unorganized sources of emissions Foul odor monitoring.2 Normative referencesThis standard references the following documents in the terms. For undated references, the effective version applies to this book standard. GB/T 14675 air quality malodor three points comparison Odor bag method Determination of Particulate Matter and Gaseous Pollutants in Exhaust of Fixed Pollution Sources GB/T 16157 HJ/T 55 Guidelines for Unorganized Emissions Monitoring of Air Pollutants3 Terms and definitionsThe following terms and definitions apply to this standard. 3.1 Stink odor All odorous gases that irritate olfactory organs cause unpleasant feelings and damage the living environment. 3.2 Odor concentration Dilution factor for serial dilution of odorous samples to odor threshold with odorless air. 3.3 Odor threshold odor threshold The olfactory threshold includes a sensation threshold that can be present as an olfactory odor and an identification threshold that can determine the odor characteristic. In this standard Sensory threshold is used. 3.4 Ratio of proper odor results The weighted statistical value of the sniffing resolution of the sniffing member. 3.5 Perimeter boundary Means the legal boundaries of the stench discharge unit. If there is no legal boundary, then the actual boundary. 3.6 Stench sensitive point odor sensitive point Refers to the crowd gathering area, including people's places of residence, venues and so on.4 foul sampling points and sampling frequency4.1 Organized emission source sampling points 4.1.1 Sampling location According to GB/T 16157 gas pollutants sampling method of the relevant requirements. With a vacuum flask to collect foul gas samples, the sampling position should be selected at the exhaust pressure is positive pressure or atmospheric pressure at the point. 4.1.2 sampling points According to GB/T 16157 gas pollutants sampling method of the relevant requirements. 4.2 unorganized source sampling points 4.2.1 point layout Follow HJ/T 55 in the relevant requirements. Winds and wind speeds should be monitored during sampling of malodorous monitoring of unorganized emissions. Should be arranged in the downwind direction of the perimeter Monitoring point. Under normal circumstances, the point set up in the perimeter of the main wind direction of the downwind axis and wind direction change standard deviation ± Sº range Or within the stench orientation of the odor, as shown in Figure 1. ± S ° calculation and measurement method reference HJ/T 55, measured every minute Secondary wind angle, continuous determination of 10 times, whichever is the average and calculate the standard deviation range. When the measured circumference unconditionally sets the monitoring point, the monitoring point can be set within the circumference. In principle, the distance from the circumference does not exceed 10 Meter. When the discharge source is close to the wall (perimeter of the unit) and the wind speed is less than 1.0m/s, additional monitoring points will be set up outside the wall. When two or more units of unorganized emission sources are adjacent to each other, the unorganized emission sources to be tested shall be selected in the upwind direction When the concentration of odor monitoring, the distribution method with the former. Rain, snow and the weather, due to pollutants will be absorbed, affecting the representativeness of the monitoring data should not be odorless organized emission monitoring. Figure 1 under normal circumstances monitoring point settings diagram 4.2.2 The number of sampling points Generally set 3 points, according to changes in wind conditions may be appropriate to increase or decrease the monitoring point. 4.3 Ambient air sampling point Site monitoring of malodor, spot investigation (pollution occurs at the time, place, etc.) way to determine the sampling point. For monitoring of malodor in the water area, if the polluted water area is close to the shore, the side of the river is selected for monitoring when the wind direction is downwind, taking the shore as the perimeter. 4.4.1 Sampling frequency of organized emission sources a) Continuous organized emission sources According to the production cycle to determine the sampling frequency, the number of samples collected not less than 3 times, whichever is the maximum measurement Value. Production cycle within 8h, the sampling interval of not less than 2h; production cycle is greater than 8h, the sampling interval of not less than 4h. b) Intermittent organized sources should be sampled at the peak of the odorous pollution concentration, the number of samples collected is not less than 3 times, whichever is the maximum measured value. 4.4.2 Sampling frequency of unorganized emission sources a) Continuous unorganized sources are collected every 2 hours and collected 4 times, whichever is the maximum. b) Intermittent, unorganized sources should be sampled at the highest level of malodour contamination for a minimum of 3 samples, whichever is greater The maximum measured value. 4.4.3 Ambient air sampling frequency For the monitoring of ambient air-sensitive spots, according to the site survey, the investigation identified the sampling period, the number of samples collected at least 3 times, whichever is the maximum measured value.5 stench sampling method5.1 Sampling methods for organized sources 5.1.1 vacuum bottle sampling 5.1.1.1 system components Vacuum bottle sampling system consists of vacuum bottles, washing bottles, drying filters and suction pump and other components, shown in Figure 2. 1- three-way valve; 2- vacuum gauge; 3- drying filter; 4- vacuum bottle; 5- washing bottle; 6- suction pump Figure 2 vacuum bottle sampling system 5.1.1.2 Sampling operation a) After the dehumidification of the vacuum flask, evacuated to a negative pressure before sampling 1.0 × 105Pa. Observe and record the pressure in the vacuum bottle, Place for at least 2 hours, the vacuum bottle pressure changes can not exceed 20% of the specified negative pressure 1.0 × 105Pa, or can not be used to replace the vacuum bottle. b) System air leak check. Connect the system as shown in Figure 2. Close the sampling tube outlet three-way valve, open the suction pump exhaust, so Vacuum pressure gauge negative pressure rose to 13kPa, close the suction pump side of the valve, such as the pressure drop within 1min does not exceed 0.15kPa, It is regarded as airtight system. If found to leak, to re-check, install, leak again to confirm the system can not leak before mining kind. Before sampling, turn on the suction pump to purge the air at 1L/min for about 5 minutes to replace the air in the sampling system. c) Turn on the sampling line, open the vacuum flask cock and allow the gas to enter the vacuum flask, then close the cock and remove the vacuum flask. d) Record the sampling conditions, ambient temperature, atmospheric pressure and pressure in the bottle before vacuum sampling if necessary. Note 1. This system sampling can not be adopted when the pressure in the pipeline is negative, and the sampling position can be moved to the positive pressure after the fan. Note 2. The vacuum bottle should be as close to the discharge pipe, and should be used inert pipe (such as Teflon tube, etc.) as the sampling tube. Note 3. Wash bottles should be used when collecting strong acids or strong alkaline gases. Take 100ml washing bottle, containing washing liquid, such as gas to be measured The system is acidic, with 5mol/L sodium hydroxide solution to wash the gas, if alkaline is 3mol/L sulfuric acid solution to wash the gas. 5.1.2 airbags sampling 5.1.2.1 System composition Air bag sampling system consists of air bag sampling box, sampling bag, suction pump and other components, see Figure 3. 5.1.2.2 Sampling operation a) Connect the components as shown in Figure 3. b) System air leak check. Install a vacuum pressure gauge before the air pump, other operations are the same as the vacuum bottle sampling system, see This standard 5.1.1.2. c) Open the valve between the sampling gas conduit and the sampling bag, start the suction pump, extract the sampling bag of the air bag into a negative pressure, Into the sampling bag, the sampling bag is full of gas, close the sampling bag valve. d) Sampling according to the above operation, with the gas to be washed three times the sampling bag. e) Sampling ends, remove the sample bag filled with sample gas from the air bag sampling box and return it to the laboratory. f) Record the sampling conditions, ambient temperature and atmospheric pressure as necessary. Note. When the exhaust temperature is high, pay attention to the applicable temperature of the air bag. 1-sampling bag; 2-air bag sampling box; 3-intake port; 4-exhaust port; Figure 3 air bag sampling system 5.2 Unorganized sources and ambient air sampling method 5.2.1 Meteorological parameters monitoring Under normal circumstances, the monitoring of meteorological parameters should include the measurement of ambient temperature, atmospheric pressure, prevailing wind direction and wind speed, and Sampling synchronization. When the wind direction changes, the deviation of wind direction standard deviation ± S ° obviously deviates, it is necessary to adjust the monitoring point in time. 5.2.2 vacuum bottle sampling 5.2.2.1 Laboratory Preparation. After the dehumidification of the vacuum flask, evacuated to a negative pressure before sampling 1.0 × 105Pa. Observation And record the pressure in the vacuum flask, placed at least 2 hours, the vacuum bottle pressure changes can not exceed 20% of the specified negative pressure 1 × 105Pa, no You can not use, replace the vacuum bottle. 5.2.2.2 On-site sampling. Select the sampling location of malodorous unorganized emission source according to 4.2.1, and sample at the maximum time of malodour smell. When sampling, open the air stop clip (or air inlet valve) of the air inlet hose of the vacuum bottle to fill the sample gas in the bottle to atmospheric pressure, then Seal with gas stop inlet. 5.2.2.3 fill in the sample records. including sampling date, start time, sample number, sampling location, ambient temperature, mining Sample before the vacuum bottle pressure, vacuum bottle capacity, sampling point schematic and odor sensory description of the state of odor. 5.2.3 air bag sampling 5.2.3.1 Laboratory Preparation. Check that the sampling bag is intact. 5.2.3.2 Site Sampling. As shown in Figure 4, the sample bag after emptying should be installed in the air bag sampling box. According to 4.2.1 choose evil Smell unorganized emission source sampling position, to smell the odor during the maximum sampling period. Open the intake check valve sampling, so evil Stink gas quickly filled with gas bag. Remove the sampling bag from the lid and send the collected samples back to the laboratory. 5.2.3.3 fill in the sampling records. including sampling date, start time, sample number, sampling location, ambient temperature, mining Sample bag capacity, sampling point schematic and sensory description of foul-smelling conditions. 1- intake stop valve; 2- negative pressure table; 3- suction shut-off valve; 4- sampling bag Figure 4 air bag sampling box6 sample preparation and analysis methods6.1 Sample pre-treatment method Samples can be prediluted when the concentration of the organized source sample is too high. 6.1.1 Vacuum bottle sample pre-dilution The vacuum bottle after the sample into the laboratory to stand for half an hour to reach a temperature balance, and then pre-dilution treatment. Dilution operation Is to connect the air bag at the air inlet of the vacuum bottle, inject the known volume of tasteless air or high-purity nitrogen gas from the large-end silicone rubber catheter, Forcing the gas in the vacuum bottle into the air bag, pushing the syringe repeatedly and injecting the air and the sample gas evenly to obtain the dilution factor Sample gas for K. The dilution K is calculated according to formula (1). Ensure gas and syringe airtight, the pipeline is not adsorbed. Where. V1-- vacuum bottle collected sample gas volume, L; V2 - injected air volume, L; K - the dilution of the sample. The actual concentration of the diluted sample is calculated according to equation (2). C = C analysis × K (2) Where. K-- dilution of the sample; C Analysis - Analytical concentration of the sample, dimensionless; C - the actual concentration of the sample, dimensionless. 6.1.2 air bag samples pre-diluted Airbags collected samples to the laboratory for half an hour to reach a temperature balance, and then pre-dilution treatment. Dilution operation is Use a syringe to extract a certain amount of sample gas V1, into another air bag, and then according to the analysis of the need to inject V2 volume Air or high purity nitrogen mixture, to obtain a diluted sample gas. The dilution K is calculated according to formula (1). 6.2 Odor analysis method 6.2.1 odor concentration analysis in accordance with GB/T 14675 related requirements. 6.2.2 Determination of emissions source odor concentration, the gas distributor first dilution test, the initial determination of the initial dilution factor. And then More suitable for sniffing personnel to carry out experimental dilution concentration for follow-up experiments. 6.2.3 Determination of environmental odor concentration, the results of the group average resolution of the M may have several results, the following provisions Analyze. A. M1 The average dilution rate of the first average solution is less than 0.58, then stop the analysis, the sample odor concentration of less than 10. B. M1 first dilution factor average solution rate is less than 1 and greater than 0.58, and then increase the dilution factor 10 times, obtained in paragraph The average dilution rate of the second dilution rate of M2, if M2 is less than 0.58 to stop the analysis, according to GB/T 14675 in the relevant formula Sample odor concentration. C. If the average rate of the first dilution of M1 is less than 1 and greater than 0.58, the average of the second dilution Although the dissolution rate M2 is less than M1 but still greater than 0.58, then continue to 10 times the gradient dilution gas distribution until the final average rate of dissolution is less than 0.58, and calculate the odorous concentration results with the average rate of one adjacent immediate solution as M1. At this time t1 in the formula is adjacent to the thin Release multiple. D. M1 is greater than 0.58. When M2 is greater than M1 after continuing the sample dilution, it indicates that people have a sense of smell of the gas Sensitivity is high, M1 gas concentration away from the olfactory threshold, should continue to increase the dilution factor until the average positive solution rate Mn small At Mn-1, and less than 0.58, the analysis was stopped.7 monitoring results and records7.1 pairs of data in the calculation of the intermediate parameters (M, α, Xi, X) rounded to two decimal places, the rest are not for the intermediate process Rounding, odor concentration result of the decimal places only, rounded. 7.2 site monitoring sampling, sample storage, sample transport, sample transfer, sample processing and laboratory analysis should be based on rules Seriously record the format. 7.3 Odor concentrations of sampling records, transfer records, odor records, gas distribution records, Odor concentration measurement results registration form, etc. Record format see Appendix B.8 Quality Assurance and Quality Control8.1 Monitoring personnel requirements 8.1.1 Requirements of the supervisor In accordance with GB/T 14675 in the relevant requirements. 8.1.2 sniffing work requirements In accordance with GB/T 14675 in the relevant requirements. 8.2 Sampling equipment preparation 8.2.1 vacuum bottle a) For odor concentration sampling, the sample should be used before the air purge, and then use the vacuum, the vacuum bottle after use should be Purge with air. When the use of the vacuum bottle after the more serious pollution, the method should be used boiling or potassium dichromate washing method Reason. For details, see Appendix A.1.3. b) When the sample concentration of organized emission sources is too high and the sample needs to be pre-diluted, the vacuum bottle should be set before sampling Capacity, can be used to measure the volume of vacuum flask fixed volume, vacuum flask after volume should be dehumidified and then exhaust sampling. Fixed volume addition Wet method see Appendix A.1.4. c) A leak test should be performed on newly purchased vacuum bottles or newly installed stoppers. Vacuum tight with a rubber stopper with a vacuum gauge Bottom of the big mouth, vacuum decompression to the absolute pressure 1.33kPa below, placed 1h, if the absolute pressure inside the bottle does not exceed 2.66 kPa, It is regarded as airtight. 8.2.2 Syringes The newly purchased syringes should be leak tested. Wet the syringe stopper with water, inhale air to the mark 1/4, With a rubber cap blocked vent, repeatedly push the pull out of the plug a few times, such as the plug every time the position back ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HJ 905-2017_English be delivered?Answer: Upon your order, we will start to translate HJ 905-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of HJ 905-2017_English with my colleagues?Answer: Yes. The purchased PDF of HJ 905-2017_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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