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The overall thermal efficiency of the boiler is 93%, and the comprehensive cost is reduced by 30%

Recently, leading domestic boiler manufacturers such as China Nuclear Power Equipment Co., Ltd., Shanxi Blue Sky Group, and China Energy Conservation Corporation have arrived in Lanzhou for inspection and negotiation.

They only have one goal-high efficiency pulverized coal boiler.

The reason is that the first high-efficiency pulverized coal boiler with independent intellectual property rights was settled in Lanzhou.

New boiler with high efficiency and energy saving

Located in the eastern section of Nanshan Road, Lanzhou City, Lanzhou Thermal Power Corporation North Machinery Plant heating station, this is the province's first high-efficiency and environmentally friendly pulverized coal boiler location.

The boiler is running, the windows in the boiler room are clear, the ground is clean and dust-free, and potted flowers are growing vigorously. There are two 3 m square horizontal boilers like large cars. It was put into operation in 2011; it consumes not well-known raw coal, fuel oil or natural gas, but a brand-new fuel-raw coal processed coal powder.

In March 2012, the domestic authoritative testing agency Shanghai Industrial Boiler Testing Center tested the boilers here; in January this year, the Gansu Province Energy Conservation Center also independently tested them. The two test results were consistent: the boiler combustion efficiency was 98%, Thermal efficiency is 93%; thermal efficiency is not only much higher than the average 60% of ordinary chain furnaces, but also higher than 83% of coal water slurry boilers and 90% of natural gas boilers. As coal combustion efficiency has been increased by more than 30%, the amount of coal saved has reached 40%, the amount of electricity saved has been reduced by 30%, and the overall cost has decreased by 30%. Its excellent energy-saving and emission-reducing characteristics also attracted the attention of the Ministry of Industry and Information Technology and the National Energy Administration, and sent personnel to visit Lanzhou to give them full affirmation.

When referring to the new boiler, Liu Chunsheng, the project leader of Lanzhou Thermal Power Corporation, told reporters that when they planned to build a heating station near the North Machinery Plant in 2011, the Provincial Industry and Information Commission strongly recommended coal that was included in the national key promotion. New technology for powder boilers. So they planned to try high-efficiency pulverized coal boilers after a nationwide inspection. After the project was finalized, Lanzhou Thermal Power Corporation and Lanzhou Boiler Manufacturing Co., Ltd. sent experts to jointly develop with the National Coal Research Institute. After hard trials and researches, research and innovation based on the burner of the Chinese Academy of Coal Sciences has realized many upgrades and reforms of the burner and boiler body. Now it has many localized independent intellectual property rights and is applying for the National Patent Office. The original three 6-ton steam coal-fired small boilers were replaced with two 20-ton steam new high-efficiency pulverized coal boilers manufactured by Lanzhou Boiler Manufacturing Company. The results were much better than expected. He said that compared with the old boilers, the coal storage and ash storage system of the heating station of the North Machinery Plant are all self-operating tower structures, fully enclosed and pollution-free; small in size, less in employment, and twice the performance. Liu Chunsheng said that the overall control system of this equipment is close to the level of Germany, and the technology is at the forefront of the country.

The high-efficiency pulverized coal boiler's excellent characteristics of energy saving, emission reduction and money saving immediately won the favor of Lanzhou Thermal Power Corporation. Following the commissioning of the first pulverized coal boiler in 2011, Lanzhou Thermal Power Corporation also remodeled the boiler room in Antan Residential District of Yantan, and upgraded two 20-ton coal-fired boilers to two 20-ton high-efficiency pulverized coal boilers. After commissioning, it was found that the heating capacity of the original two 20-steam coal-fired chain furnaces can be achieved with only one 20-steam ton of new boilers. The coal consumption per hour was reduced from 5.6 to 2 tons, and electricity consumption was reduced by 60%. .

According to the relevant experts of the Provincial Industry and Information Commission, the high-efficiency pulverized coal boiler is an intelligent and efficient heating system, which includes centralized preparation of pulverized coal, precision storage and supply of powder, air staged combustion, furnace desulfurization, and boiler shell (or water pipe) boiler heat transfer. , Efficient bag dust removal, flue gas desulfurization and automatic control of the whole process. The most important feature of high-efficiency pulverized coal boilers is that they are very energy-saving, environmentally friendly, and economically outstanding. First, the investment is small, the floor space is small, the effect is fast, and the mobile is flexible. The entire construction investment is the same as the traditional coal-fired boiler, and the area is reduced by 60%. Construction and commissioning. The second is clean discharge and cleanliness. Pulverized coal and ash are sealed for storage and supply. Pollutant emissions not only fully comply with national standards, they are even comparable to natural gas boilers. The third is high thermal efficiency and low cost. Fuel consumption was reduced by almost half, and overall costs were reduced by more than 30%. Fourth, all systems of the boiler are controlled and operated by an automatic measurement and control system, which is scientifically measured and controlled, safe and stable.
The myth of "blue sky and white clouds" is not far away

Due to the special geographical terrain and severe air pollution in Lanzhou City, the implementation of the "blue sky project" has become the primary task of successive provincial and municipal governments. The Lanzhou Municipal Government has taken a series of air pollution control actions such as moving factories out of the city, entering the home with natural gas, and changing car oil to gas. By the end of 2012, the number of days with good ambient air quality in Lanzhou City reached 270 days, an increase of 28 days compared to the same period last year. To record lows.

However, it still has a long way to go to completely change the air pollution in Lanzhou. Its core point lies in the reconstruction of traditional coal-fired boilers, which is an important source of pollution, and has been listed as the top priority for air pollution control. In the past 10 years, the reconstruction of Lanzhou boiler has gone through many times such as anthracite, diesel furnace, coal water slurry, natural gas and so on.

Natural gas is clean energy, but the supply of resources is tight and the pipeline network is limited. It is not realistic to replace natural combustion boilers with natural gas. Because of this, the high-efficiency pulverized coal boiler first landed in Lanzhou and undoubtedly became a "dark horse" of clean energy. It immediately attracted the attention of the Provincial Industry and Information Commission, Lanzhou and other government departments. According to the data provided by Lanzhou Thermal Power Corporation, due to the new low-temperature combustion process of this boiler furnace, the nitrogen oxides produced are very low, and the concentration of smoke and dust emissions and sulfur dioxide emissions are significantly lower than the national emission standards. Technical measures to achieve clean operation.

In August 2012, with the consent of the provincial government, the Provincial Industry and Information Commission issued the "Opinions on Accelerating the Promotion of High-efficiency Pulverized Coal Industrial Boilers and Solar Boilers" to the province, and vigorously promoted high-efficiency pulverized coal boiler technology throughout the province.

In order to completely control air pollution, the Lanzhou Municipal Government took active action. Yu Haiyan, member of the Standing Committee of the Provincial Party Committee, Secretary of the Lanzhou Municipal Party Committee, and leaders of the municipal government respectively led relevant departments to conduct in-depth investigations in the northern thermal center, and arranged and deployed on-site the promotion and application of high-efficiency pulverized coal boilers. Based on their respective functions, the department quickly started the preliminary work. The leaders of Lanzhou City also stated that Lanzhou City should set up a special work headquarters, implement a regular meeting system, and coordinately solve various problems in the promotion process in different periods. At the same time, the promotion and application of high-efficiency pulverized coal boilers will be included in the performance evaluation.

People in the industry generally believe that if hundreds of traditional coal-fired boilers in Lanzhou are retrofitted, the air quality in Lanzhou will be greatly improved. The person in charge of the Lanzhou Municipal Government made a positive evaluation at the province's high-efficiency pulverized coal boiler industry promotion meeting: At the moment when the air pollution control was being tackled, the high-efficiency pulverized coal boiler recommended by the Provincial Industry and Information Commission did a great thing. The project construction companies pay their respects.

It is reported that Lanzhou has started the construction of 20 high-efficiency pulverized coal boilers with a total of 550 steam tons this year.

The construction, investment and operation of high-efficiency pulverized coal boilers, combined with comprehensive pollution control of Lanzhou City, have brought the citizens of Lanzhou's expectations of "blue sky and white clouds" one step closer.



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