I, the construction project environmental protection facilities for the completion of environmental protection acceptance monitoring the importance of the work
Construction project environmental protection facilities for the completion of acceptance monitoring is environmental monitoring for the construction of environmental management projects to provide technical services for a work. Mainly includes the construction of environmental protection facilities, operation and management of the inspection, pollutant discharge test.
Construction projects are completed, to organize acceptance. In the acceptance process, environmental monitoring, is an essential and important link. Increase the construction project completion of environmental protection acceptance monitoring efforts to strengthen the completion of acceptance monitoring technology research, improve the technical level of acceptance monitoring, enhance the environmental monitoring of the completion of the project acceptance of the role of supporting the effective prevention and strict control of the new project of environmental pollution, the survival of the construction project and the development of the plan. The State Council and the State Ministry of Environmental Protection attaches great importance to this work, has promulgated a series of regulations, provisions and management methods, so that the environmental protection business sector for the completion of the acceptance of the monitoring of the law, there are rules and regulations to follow, there is evidence, so that the completion of construction projects to monitor the acceptance of environmental protection gradually embarked on a scientific, standardized and legal track.
Two, the construction project environmental protection facilities for the completion of the scope of environmental protection acceptance monitoring
Strengthen the construction project project, feasibility study, design, construction and trial production and other phases of environmental management, acceptance monitoring to cover the construction project environmental protection, "three simultaneous" the whole process, and should not be limited to The acceptance monitoring should cover the whole process of the "three simultaneous" environmental protection of the construction project, and should not be limited to the testing of the end of the environmental treatment facilities of the construction project. To test, check and evaluate the advanced, rationality and feasibility of the production technology, process and environmental protection facilities of the construction project, and to make a comprehensive, objective and accurate evaluation of the environmental impact of the construction project, the total amount of emissions, environmental quality and the internal environmental management of the enterprise.
Three, acceptance monitoring in the working conditions approved
1. Currently the Ministry of Protection of the State of the technical requirements for the completion of environmental protection facilities for construction projects acceptance monitoring:
(1) industrial production-type construction projects, acceptance monitoring should be in a stable working conditions, the production of load to achieve the designed production capacity of 75% or more (national and local emission standards for the load of the production of other provisions in accordance with the standard provisions). (national and local emission standards on the production load of other provisions in accordance with the provisions of the standard implementation) of the situation.
(2) For the construction project that cannot be adjusted in a short period of time to achieve the load of 75% or more of the designed production capacity, the acceptance monitoring shall be carried out under the condition of meeting the load of 75% or more of the 75% or the production load required by the national and local standards.
(3) For the part of the construction project which is unable to adjust the working condition in a short time to reach 75% or more of the load of the designed production capacity, and it is really impossible to adjust the working condition in a short time to meet 75% or more of the load of the designed production capacity after it is put into operation, the acceptance monitoring shall be carried out in the condition that the main project operates stably and the environmental protection facilities which should be operated run normally, and for the environmental protection facilities which are operated and the environmental protection facilities of the part with no pollution load, the acceptance monitoring shall be carried out in the condition that the main project operates stably, and the environmental protection facilities which should be operated run normally. No pollution load part of the environmental protection facilities, acceptance monitoring to take indicate the actual monitoring conditions and check the combination of methods.
2. In practice, we approve the working conditions generally in two stages:
1) site investigation stage: first of all, the assessment of the enterprise's design production capacity to meet the requirements of the EIA and EIA approval (≥ 75%), which basically determines the enterprise's acceptance of the acceptance of the monitoring work can be continued to proceed downstream. At this stage, some enterprises often misrepresent their production capacity, overstate or understate. In this regard, we have to do: ①, on-site investigation, to be in the normal production of enterprises; ②, try to view the original production records, according to the feeding, discharging volume accounting; ③, according to the volume of the reactor, the number and production cycle accounting.
(2) on-site monitoring stage
This stage of the main assessment of the enterprise in accordance with the requirements of the working conditions of the production, so as to assess whether the pollutants can be stable long-term emission standards. At this time, some companies will use: ① reduce the amount of feed to reduce the amount of pollutants discharged; ② part of the production equipment idling; ③ regardless of cost, increase the amount of chemicals; ④ prolong the residence time.
(3) How to approve the working conditions
①Check the production records, according to the feeding and discharging volume accounting.
②Record as detailed as possible the amount of chemicals used and the frequency of replacement.
3 in the preparation of acceptance monitoring program must fully consider the various environmental factors.
Four, the measurement of exhaust gas in the process of influencing factors and problems
(a) conditions for the determination of the results of the impact
Measurement of exhaust gas, if the monitoring of the conditions does not meet the reality of the negative pressure of the exhaust pipe is too large, then you need to select the detection instrument, the requirements of the choice of the instrument to have a sufficient range to be feasible, otherwise it will not be able to overcome the impact of the negative pressure of the exhaust pipe. The instrument should have enough range to be feasible, otherwise it will not be able to overcome the negative pressure in the exhaust pipe. When the collection of flue gas, dust pumps and gas pumps start at the same time, if the flow of dust pumps is very large, it is necessary to extract a certain amount of samples to be measured and analyzed in the analytical instrument, the gas pump to extract the samples in the container for the monitoring of the gas analysis, which can effectively ensure that the monitoring of negative pressure under the circumstances of the smooth progress of the monitoring work.
(B) flue gas temperature for monitoring results
As the monitoring of flue gas temperature is an important indicator of pollutant emissions monitoring process, and in the monitoring process can be equipped with its own instrumentation signal to monitor the flue gas temperature. Temperature monitoring of flue gas, to ensure that the purification equipment without static electricity, if with static electricity is easy to the host broken, resulting in the normal monitoring. If the host is hit by the bad need to interrupt the monitoring, which will cause damage to the monitoring instrument, but also cause the failure of the monitoring, so for the flue gas temperature monitoring should pay attention to the purification equipment in the electrostatic situation. In order to avoid the emergence of purification equipment with electrostatic damage to the host can be used thermocouple thermometer method to monitor the flue gas temperature, this method is not only simple, but also safe and effective.
The collection of flue gas if the sampling tube does not join the intervention treatment heating and cooling device, then the flue gas pollutants are very easy to dissolve, and the loss of the amount of monitoring, so that the measurement value is low. Especially for the determination of SO2 is more obvious, due to SO2 dissolved in the determination process, so the final results obtained by the monitoring data is small, and finally used the pretreatment measures of heating and cooling, the results obtained at this time is significantly higher than the previous monitoring results. In order to prevent condensation of the collected gases in the pipeline and to avoid low results due to dissolution of gases in water.
(C) dust particles on the wind volume of interference affects the results
On the pollution source exhaust gas monitoring, first of all, dust sampling when the concentration of dust particles is too high, will directly affect the dynamic pressure and full pressure fluctuations caused by fluctuations in the magnitude of the larger, resulting in the amplitude of the calculation of the large, isokinetic sampling flow rate fluctuations, tracking effect is poor. At the same time in the monitoring of exhaust gas flow before dust removal is often smaller than the exhaust gas flow after dust removal, which is mainly due to the influence of dust particles. Therefore, in the monitoring of exhaust gas, the need to add dust before the sampling point, while the sampling point with the dust after the comparison of the results of monitoring and analysis, thereby reducing the monitoring error.
V. Pollution sources and pollution control facilities monitoring
1. Monitoring site layout
Monitoring sites should reflect the real situation of sewage and environmental protection facilities to minimize the effect of the operation of the workload, monitoring site layout should be consistent with the standards and regulations.
In the exhaust gas into and out of the treatment facilities of the appropriate location of the pipeline to open sampling holes (sampling holes should be preferred in the vertical pipe section and the flue negative pressure area, as far as possible to choose the cross-section of the air flow is stable, the monitoring point should be representative, accessible, operable, safe and in line with the relevant standards of layout requirements), and set up an appropriate number of sampling frequency for monitoring; pollution treatment Facility Treatment Efficiency:
2. Monitoring Program
Based on the characteristics of the emission of pollution sources in the production process, the main pollutants and characteristic pollutants emission concentrations, emissions monitoring, and monitoring and calculation of the total amount of control indicators.
The purification efficiency or purification effect of total pollution facilities is measured. After the environmental impact report approved by the administrative department of environmental protection and the environmental protection design of the construction project to determine the factors that need to be monitored, and in conjunction with the actual pollution factors generated by the construction project after the trial operation, strictly in accordance with the monitoring program approved by the administrative department of environmental protection to monitor the projects proposed.
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