China is a large energy country and has abundant biomass resources. Direct combustion of biomass has always been a major bottleneck that has plagued China's environmental protection. In order to solve the direct combustion problem of biomass, it is necessary to adapt to the rapid development needs of biomass energy use, and to guard the blue sky and clear water. The social responsibility of the central SOEs, the Harbin Boiler Works Co., Ltd. (“Hakuo”) scientists and technicians of the Harbin Power Group Co., Ltd. (herein referred to as 'Hakuo') have devoted themselves to the field of coal-fired coupled biomass power generation and achieved significant results. They have quickly gained access to the coal-fired biomass power generation market. We are pleased to have successfully obtained the general contract for the coupling of the 20,000-kilowatt supercritical coal-fired generating unit of the Datang Jilin Changshan Thermal Power Plant with the 20,000-kilowatt biomass power generation transformation demonstration project. It is the first largest national-scale coal-fired coupled biomass gasification power generation technology in China. Renovation of pilot demonstration projects.
Mr. Fan Xianfeng, Secretary of the HQ Party Committee and Chairman of the Board of Directors, said that starting from our country’s actual situation, HCC has been deeply promoting quality changes, efficiency changes, and power changes in the “Four Coupling” areas, and has achieved major breakthroughs. It symbolizes that Haji has taken a solid step in accelerating the transformation and upgrading and industrial restructuring, and has made significant contributions to the utilization of biomass energy in China.
The picture shows the state key laboratory of Habao efficient clean coal-fired power station boiler
The picture shows the advanced production equipment
Biomass-coupled power generation highlights the wisdom of pots
The advanced biomass circulating fluidized bed gasification coupled power generation technology independently developed by Hutchinson has the characteristics of low electricity consumption, high gas production rate, low ash content, safety and reliability, and is suitable for large-scale, large-scale commercial applications. Significant benefits and social benefits.
As the country’s requirements for environmental protection continue to increase, the importance of the use of renewable energy resources such as biomass has gradually increased. In 2016, the National Energy Administration proposed that during the “Thirteenth Five-Year Plan” period, the country will push forward coal power + biomass, and coal power + Sludge, coal power + garbage, coal power + light and heat, etc. 'Four couplings' for power generation, through the admixture of burning straw, agricultural and forestry waste, sludge, waste fuel and other effective ways to promote environmental governance, significantly increase renewable energy At the end of 2017, the National Energy Administration and the Ministry of Environmental Protection issued the “Circular on Launching a Pilot Project for Coupling Coal-Fired Biomass Power Generation Technology Transformation” to vigorously support the application and promotion of biomass-coupled power generation technology.
Datang Changshan Power Plant's coal-fired coupled biomass gasification power generation project is located in Changshan Town, Jilin Province. It is located in the northeast commercial grain base center. The biomass fuel of the power plant is mainly corn stalk, and the surrounding resources are abundant. The project will be in the existing site of Unit 1 Build a biomass gasification power generation project with a power generation capacity of 20,000 kilowatts, and use the micro-positive pressure gasification technology of circulating fluidized bed to send the generated biomass gas to a 660,000-kilowatt supercritical coal-fired unit boiler, and pulverized coal. Co-firing, the use of existing coal-fired power generation system to achieve efficient biomass power generation, can effectively solve the problem of environmental pollution and waste of waste caused by direct combustion of straw in the field. The project is scheduled to put into production by the end of September this year.
The Haba coal-fired coupled biomass power generation technology fully combines the Haba fluidized bed technology with the technical features of large-scale coal-fired units, and uses an independently developed advanced biomass circulating fluidized bed gasification coupled power generation process. Biomass fuel is broken or pressed After being fed into the fluidized-bed gasification furnace, the bed is subjected to the action of the bed material and fluidized medium to make the furnace bubbling and fluidized. The material and the gasification agent are in full contact with each other. Simultaneously with efficient gasification, the temperature of the gasification unit is controlled. The dense phase zone at the bottom of the gasifier adopts a tapered section design to ensure a high fluidization velocity at the bottom and to reduce the time required for the straw fuel to crush, which is beneficial to efficient fuel and stable gas. At the same time, by increasing the fluidization speed, it is ensured that the fuel has been broken into small particles of coke that are easy to fluidize when it falls into the dense phase area, and the higher gasification efficiency is ensured through rational air distribution.
The biomass gas burner adopts Hutchinson's own R&D burner, and the gas burner is arranged in the nitrogen oxide reduction zone of the furnace. A reasonable burner air distribution design is beneficial to reduce the nitrogen oxide emission of the boiler, and the combustion temperature of the biomass gas is low. It can further reduce the formation of thermal nitrogen oxides. The gas pipeline system adopts medium-temperature and medium-speed design, which not only reduces the complexity of the system, but also helps to improve the stable combustion characteristics of the biomass gas boiler. The biomass material feeding system adopts independent innovation design. Advanced technology, energy saving and environmental protection, and reliable operation. The advanced biomass circulating fluidized bed gasification coupled power generation technology developed by Hutchison has the characteristics of low plant power consumption, high gas production rate, low ash content, safety and reliability, etc. Large-scale, large-scale commercial applications, significant economic and social benefits.
It is understood that China's annual biomass resources exceed 1 billion tons, and there is a lack of large-scale, high-efficiency means of use resulting in environmental pollution. Coal-fired coupled biomass power generation technology can rely on high efficiency and environmental protection facilities of coal-fired power plants to achieve ultra-low emissions, and achieve straw and other biomass Resource-efficient, harmless and efficient use. Compared with traditional biomass direct-fired power generation, coal-fired coupled biomass power generation not only saves about 40% on construction investment, but also increases biomass power generation efficiency by more than 10%. High efficiency, good environmental effects, significant social benefits, and other outstanding advantages, effective use of biomass energy value, is an important direction of development of biomass resources.
Garbage coupling power generation
The innovative concept of 'coal-coupled waste power generation technology' developed independently by Hazuru has solved the technical problems of traditional waste incinerators, meets the requirements of the times, and provides new solutions to solve the stubborn diseases of straw direct burning and urban waste disposal.
In the research and development of coal-fired coupled power generation technologies, the H2O has been deeply intensively working to increase the level of coal-fired power generation coupled with electricity, and actively promoted the energy production and consumption revolution. HRC has boldly innovated, tried first, and vigorously promoted the 'four coupling' research. The State Key Laboratory of self-constructed high-efficiency clean coal-fired power station boilers has conducted a large number of combustion test research and accumulation, independently developed power generation technologies such as coal-fired coupled garbage, biomass, and waste-to-energy incineration coupled with large-scale coal-fired units in 2017. At the end of the year, it passed the review of the National Energy Administration and solved the technical problems of traditional waste incinerators. It provided a new solution to the problem of direct stubborn straw burning and urban garbage disposal, and it took the lead in the industry.
In 2016, the volume of domestic municipal solid waste removal exceeded 215 million tons. Traditional incineration power generation is one of the main methods for waste disposal. Dioxins, chlorides, sulfur dioxide, nitrogen oxides, etc. generated from waste incineration need to be separately equipped with waste incineration power plants. The complex flue gas purification system has large investment, high energy consumption, and low purification efficiency. The efficiency of conventional waste incineration generator sets is only 18% to 25%.
The Hutcheon coal-fired coupled waste-to-energy technology fully combines the technical features of waste incinerators and large-scale coal-fired units, uses double-chain coupling, and steam-side coupling introduces the main steam generated by the waste incinerator into the thermal system of the coal-fired unit to lower the energy level. The waste heat from the waste incinerator is partially transferred to a high-energy-grade coal-fired boiler for power generation to achieve efficient utilization of waste heat; coupling of the flue gas side introduces the tail flue gas generated from the waste incinerator into the coal-fired boiler, which saves waste gas purification from the waste incinerator System equipment input.
This technology breaks down the operating mode of traditional waste incinerators and has significant advantages in energy saving and environmental protection. Hada advanced clean and efficient waste recycling utilizes power generation technology, and utilizes large-scale coal-fired coal on the premise of the smallest amount of existing coal-fired power plants. The advantages of the unit's high-efficiency thermal cycle system can effectively solve the problems of low power generation efficiency, high exhaust gas temperature, fly ash contamination, and high pollutant disposal costs of dioxins in traditional waste incinerator power plants, which can improve the efficiency of waste incineration power generation. To 31.6%, to achieve garbage harmless, reduce, resource, low-cost disposal, improve the efficiency of waste energy utilization, reduce the unit of garbage disposal investment costs and operation and maintenance costs.
Renewable energy use contributes to pot power
In the development of coal-fired coupled-trash, biomass and other power generation technologies, Hazuru has conducted in-depth research on coal-fired coupled sludge power generation technologies and flexible transformation technologies to fully implement national renewable energy policies and promote ecological civilization.
Renewable energy is an important part of the energy supply system. It is an important measure for China to promote the revolution in energy production and consumption and promote energy transformation. Habao has developed coal-fired coupled waste, biomass and other power generation technologies in-house, and has conducted in-depth coal-fired combustion. Coupling sludge power generation technology, flexibility transformation technology and other research work, fully implement the national renewable energy policy, optimize resource allocation, and promote ecological civilization.
Research and development of coal-fired coupled sludge power generation technology. After urban sewage treatment, a large amount of sludge will be generated. The combination of sludge and coal-fired unit power generation technology can make full use of the resources in sludge to achieve reduction, stabilization and harmlessness. And resource utilization. Habao independently completed the thermal calculation of the mixed sludge in the pulverized coal-fired boiler, the combustion state in the pulverized coal-fired boiler with mixed sludge, the change in smoke composition and the numerical simulation of the change in heat transfer characteristics, etc. The investment in slime incineration is small. Only the sludge storage facilities and sludge transport system in the existing power plant need to be built. At the same time, the existing boilers and flue gas treatment equipments can be partially transformed to meet the requirements for sludge harmless disposal. Incineration slag can also be made into ancillary products, with good economic and environmental benefits. Sludge coupled power generation technology uses coal-fired high-temperature flue gas drying system to replace the traditional steam dryer, sludge drying speed, system tightness , It can effectively control the spread of odor. The dried sludge is directly mixed into the raw coal of the furnace through a closed belt conveyor, and burned into the furnace as fuel. The large-capacity power station pulverized coal boiler is used for sludge. Burning process large-scale, high-temperature combustion, can effectively suppress the formation of polycyclic aromatic hydrocarbons, dioxins and other organic pollutants.
We will increase the research on the flexibility of unit thermal power generation. During the “Thirteenth Five-Year Plan” period, China will implement the flexibility of 220 million kilowatts of coal-fired units to be upgraded to enable the units to have in-depth peak-shaving capabilities. The state has determined 22 batches of power plants in two batches to be used as thermal power flexibilities. The pilot project, including 15 power plant boilers, is the HQ product. The combination of the HABA plant unit's own operating characteristics and peak-peaking target range can be used to flexibly develop the transformation technology route to achieve safe and stable operation of the coal-fired unit under low load. At present, Hazuru has conducted special studies on issues such as the operation of fans and coal mills under ultra-low loads, completing burner rebuilds, boiler thermal and wall temperature calculations, boiler heating surface reconstruction and other programs, and providing optimal solutions for power plant flexibility reforms. Habao also cooperated with related domestic institutions to research and develop the low valley thermal storage equipment with independent intellectual property rights, which has reached the leading domestic level and has modularity, systematic design and supply capability. The thermal storage technology uses electricity as New technologies for power, including high-temperature solid-state heat storage equipment + electrode boiler, single-tank water heat storage equipment + electrode boiler, double tank molten salt heat storage equipment + electricity For many types of pole boilers, low-valley electricity can be used to achieve deep peak adjustment of large-scale thermal power units.
Waste incineration has opened up a new world. 6 sets of deep energy and environmentally friendly waste boilers have been built. Once completed, it will become the world's largest and highest standard waste incineration power plant. The project is a single high-pressure multistage stepped grate with a daily capacity of 850 tons. Garbage incinerator adopts multi-stepped grate furnace technology, which has strong waste disposal capacity and power generation efficiency of up to 25%. It is in the world's leading level. The boiler adopts a modular design and divides the boiler evaporator and superheater into 14 parts. The module is produced. The welding spot at the construction site is reduced by more than half than the conventional design. The on-site installation is convenient and the quality is easy to guarantee. All products will be available before April 2018. It is expected to be put into operation by the end of 2018.
In an interview with reporters, the deputy secretary of the Habao Party Committee and General Manager Zhang Yanjun said that Habao insisted on the main business and vice-prosperity, and in particular actively promoted the 'four couplings', flexible transformation and other technical studies, and contributed to building a beautiful China. Pot power. Habao will also be driven by technological innovation to promote sustainable and healthy business development.