Where is the cheapest place to renovate coal-fired boilers in Henan

Description :

　　Henan coal-fired boiler renovation, professional company coal-fired boiler renovation biomass boiler

　　Henan Heli Contract Energy Management Co., Ltd. is a subsidiary of Fangcheng Sanli Thermal Energy Development Co., Ltd. It is a company that focuses on the research, production, and sales of new energy, which refers to the research, production, and sales of energy from agricultural waste, forestry waste, animal waste, urban waste, coalbed methane, rock methane, and other raw materials. It is committed to transforming waste into treasure and enhancing value through cooperation; Dedicated to providing full process services to customers; Specializing in the continuous improvement of energy conservation and environmental protection, the company's system covers biomass production and application modes, research and development of production equipment, usage equipment, recycling, standard formulation, scheme design, engineering implementation, operation management, after-sales service, and the construction of a one-stop service system for continuous efficiency improvement. With Nanyang, Henan as the technology demonstration center, the company covers the construction of the industrial chain for replacing mineralized energy with new energy for industrial boilers nationwide. New energy is artificial energy. In order to standardize industry standards, comply with the stable operation of industrial boilers, improve boiler efficiency, and meet environmental protection requirements, our company has high requirements for energy quality and boiler room design. We have a technical team and the ability to provide design tasks in application fields. Each base has the ability to integrate the people, talents, and materials needed for energy production. The two parties have joined forces to become strategic partners in the upstream and downstream of the industrial chain. Based on sales, with Nanyang as the hinterland, covering the surrounding raw material production areas, and planning to expand the production base to Southeast Asia in the future, with a 1:1 ratio of sales and inventory to ensure normal use by users. Company strategy: In terms of combustion supply, we will build our own production base, be responsible for quality control and standardization construction, invest in boiler equipment, directly or indirectly participate in boiler room operation and management, take it as our responsibility to demonstrate professionalism, and improve efficiency through IoT data management. Corporate culture: Focus on details, cycle derivation to improve efficiency

　　Detailed description of the renovation plan for 4 ton, 6 ton, 10 ton, and 20 ton coal-fired boilers:

　　With the implementation of national environmental protection policies, more and more coal-fired boilers are being used to transform them in order to reduce air pollution, comply with national environmental protection policies, and be more conducive to their own development. Below, Manager Yan from Henan Sanli Thermal Energy will explain the plan and operation methods for the transformation of 4 ton, 6 ton, 10 ton, and 20 ton coal-fired boilers!

　　Boiler for burning biomass after three thermal energy transformations

　　To improve the environment and reduce pollution, Henan Sanli Thermal Energy is committed to transforming coal-fired boilers into boilers that burn bioenergy (wood pellet fuel). The renovation plan of Henan Sanli Thermal Energy mainly involves utilizing the existing or idle chain grate coal-fired boiler body and boiler ancillary equipment: blower, induced draft fan, slag extractor, economizer, reducer, dust collector, boiler control cabinet and instrument valves, etc., adding 1-3 sets of spiral biomass pellet fuel feeders, 1 set of secondary air supply equipment and secondary air supply pipes, etc., to reduce the investment cost of the boiler and ancillary equipment. Coal fired boilers used for production and domestic heating are mostly coal-fired boilers with a capacity of less than 4 tons. Henan Sanli Thermal Energy started by renovating coal-fired boiler furnaces, furnace arches, furnace walls, waste heat recovery, dust removal devices, feeding systems, control systems, etc., and transformed coal-fired boilers into fully automatic biomass boilers, increasing energy efficiency to 80% -85%. 1. Analysis of Combustion Characteristics of Wood Particle Fuel in Henan Province Wood pellets are a renewable carbon source with characteristics of huge production, wide distribution, low sulfur, low nitrogen, fast growth, and low carbon dioxide emissions. The combustion of wood chips is mainly controlled by the following conditions: (1) a certain temperature; (2) A certain amount of air (oxygen); (3) The degree of mixing between fuel and air (oxygen); (4) The combustible materials in fuel undergo intense chemical reactions with oxygen in the air. The ignition temperature of biomass fuel wood pellets is 250-400 ℃, which is lower than that of coal (the ignition temperature of coal is 400-500 ℃), and the increase in temperature is supplied by the ignition heat. The combustion process of biomass fuel is a process in which volatile and combustible components react violently with oxygen in the air, releasing heat. Therefore, the supply of oxygen determines the combustion reaction process. By controlling the oxygen supply, the combustion reaction can be effectively controlled. If the structure of the current operating domestic and industrial boilers is not modified and biomass pellet fuel is directly used, the boilers will experience serious phenomena such as black smoke, low efficiency, and dust pollution. Therefore, boilers using biomass pellet fuel require the installation of specialized secondary air supply equipment to enhance oxygen intake, enabling full combustion, effectively increasing furnace temperature, reducing emissions of carbon monoxide and smoke, and heat loss. 2. The method of biomass fuel transformation of coal-fired boilers by Henan Sanli Thermal Energy (1) utilizes the existing or idle chain grate coal-fired boiler body and boiler ancillary equipment: blower, induced draft fan, slag extractor, economizer, reducer, dust collector, boiler control cabinet and instrument valves, etc., to reduce the investment cost of the boiler and ancillary equipment. (2) Convert the coal hopper used for coal fuel into a closed biomass hopper and install an anti backfire device. (3) Install one set of biomass pellet fuel conveying, storage, and feeding devices. (4) Install one set of spiral biomass pellet fuel feeder, and open an inspection hole at the upper end of the conveying pipe connected to the closed hopper at the upper end of the spiral feeder. Install a travel switch to automatically control the start and stop of the spiral feeder motor. When installing the spiral feeder, the connection between the conveying pipe and the ground conveying storage hopper should have a certain inclination angle. In order to save the floor area of the boiler room and meet the process layout requirements of the boiler room design specifications, the inclination angle of the feeding pipe should be ≤ 60 °. The installation of the spiral feeder is shown in Figure 1.

　　(5) Install one set of secondary air supply equipment and secondary air supply pipes on the side of the boiler. One secondary air supply pipe leads to the boiler furnace and the other leads to a closed hopper to ensure sufficient oxygen for fuel combustion and achieve complete combustion. The installation of secondary air supply equipment is shown in Figure 2.

　　6) Issues to be noted in boiler renovation

　　① The clear distance between the front end of the furnace shall not be less than 3m. After the installation of the spiral feeder, the distance between the ground conveying storage hopper and the front end of the boiler is 1.9m (taking a 2t/h chain grate coal-fired steam boiler as an example). If it is less than 3m, it is not convenient for operation and maintenance.

　　② Biomass fuel should not be stored outdoors, and measures should be taken to prevent rain, wind, and corrosion. In addition, during the storage process of biomass fuel, the temperature of the fuel should be regularly checked to prevent self ignition caused by excessive temperature.

　　Advantages and disadvantages of biomass fuel boilers

　　3.1 Advantages

　　(1) Biomass fuel boilers have stable combustion, fast ignition, high flame, fast gas supply, good operating conditions, and high boiler thermal efficiency.

　　(2) By changing the traditional combustion method, the emissions of sulfur dioxide, smoke and nitrogen oxides are reduced, the burnout rate of fuel is higher than that of coal, and the slag discharge is smaller.

　　(3) Biomass fuel is a renewable energy product that is conducive to the adjustment of the national energy structure and the implementation of energy-saving and environmental protection policies.

　　3.2 Disadvantages

　　(1) Due to the much lower ignition temperature of biomass fuel compared to coal, the boiler cannot be pressurized when it is temporarily shut down for too long.

　　(2) When receiving a notice to reduce or suspend steam usage and temporarily shut down the furnace, the fuel on the grate must be burned off and the slag must be removed, otherwise it is easy to cause backfire and ignite the fuel in the fuel hopper.

　　4. Precautions for the operation of biomass fuel boilers

　　Based on the operation of biomass fuel boilers over the past 3 years, the following points should be noted during the operation of biomass fuel boilers:

　　(1) Adjust the fuel supply of the spiral feeder based on the actual fuel consumption during boiler operation.

　　(2) The drum and induced draft fan shall not stop running until the fuel in the furnace is fully burned.

　　(3) When there is a sudden power outage during operation, the fuel in the furnace must be promptly removed.

　　(4) Before shutting down the furnace, no more biomass fuel shall be added.

　　(5) When shutting down the furnace, there is no need to seal the fire. The drum and induced draft fan can only stop running after the fuel on the grate is burned out.

　　(6) Due to the high content of alkali metals such as silicon, chlorine, potassium, and sodium in biomass fuel ash, the ash melting point is low and it is easy to form slag, coke, or deposit on the heating surface in the furnace, which seriously affects the heat transfer of biomass boilers and even causes corrosion, affecting the operation of the boiler. Therefore, it is necessary to regularly clean the accumulated ash and slag in the furnace, smoke chamber, and smoke pipe.

　　5. Cost analysis

　　The transformation of biomass fuel boilers is the use of existing or idle chain grate coal-fired boilers to reduce the investment cost of the boiler body. Its ancillary equipment such as blowers, induced draft fans, slag extractors, economizers, reducers, dust collectors, boiler control cabinets, and instrument valves are the same as those of chain grate coal-fired boilers.

　　Due to the fact that biomass pellet fuel is compressed and formed, it has high moisture content, high density, slow volatile matter overflow rate, is not easy to ignite and burn, and is prone to emitting black smoke. Therefore, to ensure complete combustion of biomass fuel, it is necessary to increase the furnace temperature and provide sufficient oxygen supply. Therefore, it is necessary to add some equipment to increase the furnace temperature, facilitate the rapid overflow of volatile matter from biomass fuel, ensure sufficient combustion of biomass fuel, and maximize the thermal efficiency of the boiler.

　　The practical experience of Henan Sanli Thermal Energy Biomass Boiler Transformation shows that biomass fuel boilers in Henan region have an operating cost increase of 20% -30% compared to coal boilers, which should be judged based on the age of use of the boiler body. The longer the boiler is used, the lower its efficiency and the higher its cost.

　　By transforming existing or idle coal-fired boilers into biomass fuel boilers, on the one hand, the emission of sulfur dioxide can be reduced, effectively protecting the atmospheric environment; On the other hand, it can reduce the investment cost of coal and boiler equipment for boilers. Although the operating costs of biomass fuel boilers are slightly higher than those of coal-fired boilers, they are still lower compared to the operating costs of gas boilers, oil fired boilers, and electric boilers.

　　Biomass fuel, as a boiler fuel, is an ideal fuel to replace natural gas, liquefied petroleum gas, electricity, coal, etc. It has broad prospects for use and has good social, economic, and environmental benefits.

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