"From 2013 to 2022, China's GDP increased by 125 percent, while the average PM2.5 concentration decreased by 57 percent, and the number of days with severe or above pollution decreased by 93 percent. China has become the fastest country in the world to control air pollution. The continuous improvement of air quality cannot be separated from the support of the environmental protection industry. This period is also China's air pollution control technology and equipment improved the fastest period. However, for the environmental protection industry and the market field, we have also found a lot of problems in the research, supervision and assistance work."On April 14, in the China environmental protection industry association hosted the first ecological environment director and environmental protection enterprise dialogue at the meeting, ecological environment atmospheric environment department deputy director da-wei zhang in the process of atmospheric pollution control, environmental protection industry and the problems existing in the market, has carried on the profound detailed analysis, and points out the focus of the next step.
What are the problems in the environmental protection industry and the market field in the process of gas control?
Simple and inefficient facilities are popular —— backward equipment "salted fish turn over", not according to the principle of the card, mechanically copy
The so-called simple and inefficient facilities refers to the immature, inappropriate, unreliable management facilities. Zhang Dawei said: " Some have no special reaction equipment, directly spray desulfurization and denitrification agent in the flue, perfunctory treatment; some treatment projects cut corners, desulfurization facilities do not set oxidation fan, no by-products; some technical equipment has been proved to be unsatisfactory or even eliminated, a new name, 'new bottle old wine' appeared in the market; some use black box for desulfurization, denitrification and dust removal integration, using the so-called patent agent, do not inform the specific ingredients, the treatment mechanism violates the basic physical and chemical knowledge. There are also some technical equipment that can play governance effect under specific industries and specific parameters, which are applied to other industries without verification and modification, resulting in failure to achieve governance effect.”
Some treatment facilities are of poor quality —— low treatment efficiency, and even produce safety accidents
At present, the good and bad of environmental protection enterprises in China are uneven, and many small and scattered enterprises use low-quality and low-price technical facilities to seize the market, and fish-eye mixed beads, cut corners, and produce the phenomenon of "bad money drives out good money". Zhang Dawei introduced that some key components of the treatment facilities have problems, such as insufficient iodine value of activated carbon, weak adsorption; RTO and RCO combustion temperature is not enough, the organic waste gas can not be fully removed, the storage tank sealing is not strict, the constant pressure of breathing valve design failure, low accuracy, poor quality, serious leakage and emission are not strong, perforation leakage, and even safety accidents; and insufficient fan power, insufficient collection, the wind speed does not meet the requirements.
Operation and maintenance management efficiency is low —— emission concentration to the naked eye, the operation is all by both hands
Good operation and maintenance is an important guarantee for long-term and stable emission standards. If the operation and maintenance is not in place, even if the good effect can be achieved in the initial stage of installation, the post-processing efficiency will be greatly reduced, and finally false management and false emission reduction will be formed."In terms of treatment facilities, all parameters are not automatically adjusted according to production load and pollutant generating parameters, damaged instruments and failure are regulated only by naked eye, and even manual feeding, resulting in operation lag and excessive discharge; necessary supporting facilities and processes, such as oxidation fan and filter press, waste liquid saturation is still recycled; not maintained on time, long cleaning and replacement of bags, electrostatic generator, catalyst, activated carbon, or insufficient replacement. Some central control facilities are simple, using simple PLC facilities that cannot record and preserve historical data, and some do not have central control facilities at all, with all hands."Zhang Dawei said.
Online monitoring data distortion —— the last line of defense problem is particularly prominent
Monitoring and monitoring is the last line of defense for emissions regulation, but the problem is particularly acute. In terms of the operation and maintenance of monitoring facilities, the calibration is not conducted on time, the temperature of the heating pipe is low, the pipeline and key components are not cleaned or replaced for a long time, resulting in water, blockage, pollution and failure, resulting in the distortion of monitoring data. Some even break the bottom line of the law, by pulling out the smoke probe, modifying the programming software parameters, false zero and drift detection, false reporting of facility failure, simulation to change online data, issuing false manual detection report and so on.
—— To strengthen the source control and process control
Zhang said, in the past, China's air pollution control focused on the end of treatment, and insufficient attention to source control and process control. Taking the iron and steel industry as an example, it is urgent to strengthen the front-end sintering head flue gas recycling technology, mid-end coke oven gas fine desulfurization technology, low-nitrogen combustion technology of steel rolling heat treatment furnace, furnace top tank average pressure release waste gas recovery technology, the end of medium-low temperature denitration catalytic technology, efficient coated filter material and other material technology equipment research and development.
Under double pressure, what's going next? The 4 magic weapons to work together
Under the dual pressure of relatively adverse meteorological conditions and the significant increase in pollution emissions after the epidemic, the situation of air quality improvement has become more severe this year.
In this background, da-wei zhang said: " the next step, we will continue to adhere to the precise, scientific, in accordance with the law, to PM2.5 pollution control as the main direction of prevention and control of atmospheric pollution, focus on NOx and VOCs emissions, with more certainty of pollutant emissions to offset the economic development emissions increment and meteorological conditions of uncertainty, in the PM2.5 concentration continue to fall at the same time, to prevent the ozone concentration excessive growth. In the field of environmental protection industry and environmental governance, the government will focus on the following four tasks in the next step, that is, troubleshooting and strengthening weak links, creating scenes to help innovation, strict law enforcement to promote norms, and enhance capacity and strengthen supervision. At the same time, in order to promote the high-quality development of the environmental protection industry, two suggestions are put forward for the environmental protection industry, namely, to do a good job of industry self-discipline and accelerate technological innovation.”
It is reported that the Ministry of Ecology and Environment will introduce the relevant investigation and remediation plan, to guide the focus of the existing simple and inefficient governance facilities to comb and row, the implementation of classified remediation. If those have the conditions for upgrading, if they do not, alternative plans shall be planned in advance. The regulation will focus on thermal power, steel, coking, cement, petrochemical, chemical and oil storage, transportation and marketing and other industries.
It is worth noting that the Ministry of Ecology and Environment will focus on cracking down on the abnormal operation and fraud of governance facilities and monitoring facilities. It will not only punish manufacturers, but also investigate the responsibility of third-party companies such as governance, operation and maintenance, and monitoring, and eliminate a number of "scattered and dirty" third-party companies. Environmental protection companies and operation and maintenance agencies with poor project quality, low operation and management level of environmental protection facilities or even fraud shall strengthen joint punishment and regularly announce it to the public in accordance with the law.
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