Whether the thermal power and dust removal can be upgraded as scheduled

In recent years, the electrostatic precipitator industry has been continuously innovating in key technology fields and has obtained many successful application experiences. This has enabled coal-fired power plants to meet 30mg/m3 or even more stringent smoke emission requirements for fume emission, and has played an important role in smoke control and smog control. effect.

In recent years, what achievements have been made in the application of new technologies and new processes in the electrostatic precipitator industry? Are there any problems with the technology? Can the technology ensure cleaner coal use, ultra-low emissions from coal-fired power plants, and reduction of coal-fired pollution? The reporter interviewed experts in dust removal industry and leaders of leading enterprises, and they discussed and analyzed the development trend of the industry.

Respondents: Zhu Fahua, Vice President of the Research Institute of State Power Environmental Protection Shu Yinggang Chairman of the Electrostatic Precipitator Committee of the China Environmental Protection Industry Association and Chairman of the Board of Directors of Feida Group Co., Ltd. Huang Wei General Manager of Fujian Longjing Environmental Protection Co., Ltd. Experts Now, thermal power plants are in a hurry, and environmental protection companies are busy. Only 9 months have passed since the standard time limit of July 1, 2014. Can the thermal power plant complete the transformation as scheduled? “Now, some companies can’t find people to build with money, and denitrification catalysts and other products even have money to buy. No.” Zhu Fahua, vice president of the State Power Research Institute of Environmental Protection said.

The tight time, heavy tasks, and large investment are the major challenges faced by the transformation of environmental protection facilities in thermal power plants. At the end of August, the National Development and Reform Commission adjusted the environmental protection electricity price of thermal power plants. What effect will this have on the transformation of environmental protection facilities in thermal power plants? A few days ago, the reporter interviewed industry experts and relevant person-in-charges on relevant issues.

What will 0.2 points bring?

About 94% of the units need to carry out dust removal transformation, and 0.2 points can meet the operating cost requirements of dust removal facilities in most power plants. To achieve the “Twelfth Five-Year” pollutant emission reduction targets and meet the new emission standards, it is necessary to upgrade dust removal equipment. How large is the size of coal-fired units?

As one of the experts who participated in the revision of the "Emission Standard for Air Pollutants from Thermal Power Plants", Zhu Fahua told reporters that according to the calculations at the time, as of the end of 2011, about 94% of the units needed to carry out dust removal and reconstruction, which was calculated according to the size of the unit. Due to the existence of many small power plants and small units, the proportion may be higher if calculated according to the number of units.

China Environmental Protection Industry Association Chairman of the Electrostatic Precipitator Committee and Chairman of the Board of Directors of Feida Group Co., Ltd. Shu Yinggang gave more specific figures: According to statistics and projections of relevant data, as of April this year, China's installed thermal power capacity reached 830 million kilowatts. However, there are still about 400 million kilowatts of coal-fired unit dust collectors need to be upgraded, converted into 600MW units, the number is about 700 sets.

After the implementation of the new standard, the environmental protection reforms faced by thermal power companies are not only dust removal, but also desulfurization, denitrification and other aspects. For power plants with unsatisfactory economic results, the financial pressure is beyond doubt.

At the end of August, the “Notice of the National Development and Reform Commission on Relevant Matters Relating to Adjusting Additional Standards for Renewable Energy Electricity Prices and Environmental Protection Prices” was formally released to the public. While improving the denitrification price subsidies standard, the use of new technologies for dust removal facility renovation and lower dust emission concentrations 30mg/m3 (less than 20mg/m3 in key areas), and the dust removal cost of the coal-fired power generation enterprises that have passed the acceptance of the environmental protection department shall be appropriately supported, and the electricity price compensation standard shall be 0.2 cents/kWh.

The desulfurization price has played a great role in promoting the desulphurization of thermal power units. Today, dust removal also has electricity subsidies. So, how much can this 0.2 cent/kWh play?

“Despite the initial investment, financial costs and other issues, the dust-collection price of 0.2 points/kWh can meet the operating costs of most power plants. The larger the unit size, the more power generated per unit of time, the more subsidies will be obtained. "Zhu Fahua told reporters.

Shu Yinggang believes that “the country’s compensation for the cost of building and operating emission reduction facilities for coal-fired power generation companies will fully mobilize coal-fired power generation companies to accelerate the construction of environmental protection facilities and bring about a renewal of dust removal equipment for power generation enterprises. 'Timely rain'."

He calculated an account: Taking a 600 MW coal-fired unit as an example, the average annual power generation load is 75%, and the annual use time is 7,000 hours, the total annual power generation is 3.15 billion kWh, and the annual dust-removal power price will be compensated. It reached 6.3 million yuan.

Huang Wei, general manager of Fujian Longjing Environmental Protection Co., Ltd., said in an interview with reporters that the introduction of this policy is of great significance and helps to establish a sustainable protection mechanism for emission reduction. “This is a substantial incentive for thermal power companies to allow Enterprises that really reduce emissions do not suffer losses. Previously, in the field of dust removal, excessive discharges would be punished, but compliance with discharge standards is a due obligation. Now that a compensation mechanism has been established, it will help ensure sustainable emission reductions.”

As the person in charge of the domestic dust field leader, Shu Yinggang and Huang Wei believe that this measure will encourage the development of the dust removal industry while at the same time encouraging the reduction of power plant emissions. Shu Yinggang believes that this policy will also motivate dust-removing enterprise technology innovation and mobilize the initiative and enthusiasm of dust-removing enterprises for the promotion of new technologies. In Huang Wei's words, now that emission reductions have an interest mechanism, electric power companies will certainly pay more attention to the effects of emission reductions, and thus “Let Mr. Nan Guo not have a market and promote the standardized development of environmental protection companies.”

Can quality be guaranteed?

Time is tight, tasks are heavy, orders from environmental protection companies are saturated, and project quality is facing a challenge. In fact, the current “Emission Standard of Air Pollutants for Thermal Power Plants” was officially released in 2011. It has been publicly solicited for comments earlier, with emission limits added. The strict trend has long been clear. However, the environmental protection of many thermal power plants has not yet begun. Faced with the current situation of tight time and heavy tasks, can project quality be guaranteed? After all, during the “Eleventh Five-Year Plan” period, desulfurization projects have been intensively launched and many problems have arisen. How to take warning?

“A piece of white paper is good for drawing, and it is more difficult to transform existing units to a certain extent because of the need to dismantle existing facilities, and also face more complex on-site conditions and tight working space, and it is almost impossible to construct in the northern winter.” Wei told the reporter that due to the fact that the unit itself is not the same, there is no unified model for the reconstruction plan, and the identification of the plan, equipment manufacturing, on-site construction, commissioning and other interlocking, can not be a little lost. "Because the power plant needs to stop the furnace and the owner has a tight control over the time, the construction period is under great pressure."

Zhu Fahua is worried that the current demand for environmental protection market is too large. It is difficult for enterprises to meet the market demand at full capacity. Some thermal power plants may find someone to do their job swiftly to complete the renovation task, which will result in unpredictable quality.

“China's dust removal technology can meet the requirements of the latest “Emission Standards for Air Pollutants of Thermal Power Plants.” However, such a large number of dust removal equipments need to be fully upgraded within one year, and enterprises with strong design, manufacturing and installation capabilities are required. Not a lot, this will be the biggest difficulty." Shu Yinggang said.

With more and more emphasis on technology and quality, environmental protection facilities are no longer mere furnishings. Owners pay more attention to actual emission reduction effects. "Compared with the "Eleventh Five-Year Plan" desulfurization, the situation will still be better." Zhu Fahua said, "Desulfurization is the first time in the history of environmental protection. In the transformation of real swords and guns, we all first thought that the environmental protection facilities were 'giant pandas', and the leaders did not normally run them when they came to see them. Now, everyone’s environmental awareness has greatly improved, and they all realized that the environmental protection project was completed. It's going to work. The quality of the project will not be as bad as it was."

Huang Wei also holds the same view, "Now users require that environmental protection facilities can continue to operate, otherwise, the discharge will not meet the standards will face severe penalties. Therefore, the enterprise power is completely different, are in the strengthening of technology, quality checks." It is believed that there should be a release process in the market. Do not erupt as desulphurization, otherwise it is prone to problems.

Speaking of the factors that affect the environmental protection reform of thermal power plants, Zhu Fahua emphasized the issue of environmental awareness. “Some people talk about the leaders but they don’t think so. To truly improve environmental awareness, we need to do whatever it takes, and I must do a good job. There are real difficulties, but with a bit of awareness, we can always find a solution."

Some power plants have already upgraded their electrostatic precipitators, coupled with additional desulfurization and denitrification equipment, leaving little room for retrofitting precipitators. Especially in some old factories, the problem of venue tension is particularly prominent. According to Zhu Fahua, after the introduction of the 2003 version of the thermal discharge standard, many people thought that the old plant could not be desulphurized because there was no site. “But the practice since the 11th Five-Year period has proven that the problem of desulfurization sites can be solved by removing some buildings and lengthening the flue.”