Denitration of high-parameter large-capacity units of thermal power may be profitable

Up to now, the proportion of desulfurization and denitration units in the country's thermal power installed capacity has been put into operation 92% and 27% respectively, and the operation rate of desulfurization facilities of coal-fired units nationwide has increased from less than 60% in 2005 to more than 95% at present, and the average denitration efficiency of coal-fired units in the country exceeds 66%.

After the implementation of the desulfurization electricity price policy in 2004, the sulfur dioxide emissions of the power industry have dropped significantly, and since the "Eleventh Five-Year Plan", the cumulative decline of the country has exceeded
35%.
At the end of 2011, the pilot of denitrification electricity prices began, and in the first half of this year, nitrogen oxide emissions in the power industry fell sharply for the first time, falling by more than
9% year-on-year.

At the end of 2011, China implemented a trial denitration electricity price policy for coal-fired power plants that installed and operated denitration units, with a price increase of 0.
8 cents per kWh to make up for the increase in denitration costs
.
When the implementation of the denitration electricity price began, industry insiders generally said that this denitration electricity price only solved the problem of two-thirds of the denitration cost, and thermal power companies still had to pay
for denitration 。 Now that the compensation rate for denitration electricity has been raised from 0.
8 cents per kWh to 1 cent, can this price balance the cost pressure of power plants due to the addition of denitration devices? Wang Xiufeng, general manager of Hebei Huadian Shijiazhuang Luhua Thermal Power Co.
, Ltd.
, told reporters that the first phase of the company's project built a 2×33,000 kilowatt subcritical air-cooled heating unit, and the project was synchronously constructed and installed electrostatic precipitator, flue gas desulfurization and flue gas denitrification device, which has a demonstration role
in energy conservation and environmental protection.
In particular, the flue gas denitration device is designed and constructed in full accordance with the latest national standards of environmental protection, energy conservation and emission reduction.

Using a relatively mature selective catalyst reduction flue gas denitration system (SCR) denitration method with high efficiency for large flue gas volume of large units, the total investment of the project is 68 million yuan, accounting for 2.
3%
of the total investment of Luhua project.
At present, the denitration device of the two units has been fully completed and operated, and the actual measured denitration cost includes tax 0.
0129 yuan / kWh, and the denitration electricity price has been increased from 0.
8 cents per kWh to 1 cent, which is still not enough to make up for the cost, but to a certain extent, it can alleviate the operating pressure
.

Li Gang, general manager of Pingdingshan Power Generation Branch of China Power Investment Henan Electric Power Co.
, Ltd.
, said differently: the company has 2×1 million kilowatt units, and the power plant is designed according to the requirements of the environmental impact assessment to reserve the space for the denitration device, but the company took the initiative to improve the standard, "far-sighted" to change the reserved denitration site to the simultaneous construction of denitration facilities, and at the same time build one-time supporting flue gas desulfurization, denitration device, circular closed coal yard, full-membrane boiler make-up water treatment system, etc.
, and successfully obtained the approval of denitration electricity price
in April 2013 。 The company adopts the SCR denitration process, calculated according to the annual power generation utilization hours of 5,500 hours of the two units, and the average denitration cost is 0.
81 minutes/kWh
.
According to the previous subsidy of 0.
8 cents/kWh electricity price, it is difficult to maintain the operating cost
of denitrification facilities.
At present, the state gives 1 cent/kWh denitration electricity price subsidy, which has brought great help to power generation enterprises in terms of funds and policies, which can make up for the company's denitration operating costs and greatly improve the company's
enthusiasm for denitration.

After interviewing the relevant persons in charge of a number of power generation companies, the reporter came to the following conclusion: the denitration electricity price of 300,000 kilowatts and below units is still not enough to balance the cost pressure, while the denitration of 600,000 kilowatt units has profits and losses, and the denitration of million-kilowatt-level units is profitable
.