Cade Shopping Mall is located in central Shanghai Hongkou District, Shanghai Daily larger flow of people in the region. The introduction of Shanghai air pollutant emission standards, industrial hot water biomass boiler flue gas emissions of nitrogen oxide emissions to less than 80 mg / m, Shopping Mall a coal-fired boilers have been used for many years, NOx emissions far super to this request, the urgent need to replace more environmentally friendly low nitrogen emission boilers. Other units through the use of fast Boiler introduction and understanding, determined and fast boiler to achieve cooperation, party fast to their specific needs to recommend one condensing gas hot water boiler of a 4.2MW for heating needs of the shopping center.
Chain grate steam industrial hot water biomass boiler fuel: coal, biomass, cotton stalk,groundunt shell,palm fibre, saw dust, pet coke,bagasse, rick husk, etc.ZG Chain Grate Steam Boiler adopted welding self-supporting membrane water cool tube wall, which rewards the biomass fired boiler with the features of excellent sealing, less heat lost ,and little pollution.
Currently, biomass industrial hot water biomass boilers results in incomplete combustion of the fuel in the main factors: the temperature of the furnace is not enough, lower than 600 ℃, good combustion can not be established normally structure; the amount of air supplied to the fuel can not meet the combustible components required for complete combustion; amount of air supplied is sufficient, but due to the mixing and contacting do not, initiate combustion disorder; water-based fuel used in the boiler is too large, when the fuel moisture more than 45%, combustion can be difficult to ensure normal combustion; fuel particles are too large, is not conducive to combustion reaction; or the reaction time of the combustion grate enough vibration amplitude is too large, the interval is too short, insufficient burning time; much ash, coke particles and wrapped, the combustion rate slowing; feed lot, on the grate fabric layer is too thick, gas-solid mixture is not benign; feed grate or thin material less heat storage capacity is insufficient. Products of biomass combustion boiler, contains a lot of combustible, ash black, sometimes visible raw material is discharged. The combustion gas contains a large amount of carbon monoxide combustible components. Factors causing incomplete combustion boiler fuel as follows: (1) the furnace temperature is not enough, lower than 600 ℃, good combustion can not be established in general structure. The amount of air (2) supplied in the fuel can not meet the need for complete combustion of the combustible component. The amount of air (3) is sufficiently supplied, since poor mixing and contacting the combustion disorder. (4) abnormal accident. (5) too much water the fuel as received, more than 45% of the water is difficult to ensure the normal combustion of the fuel. (6) the fuel particles are too large, is not conducive to the combustion reaction. (7) the reaction time of the combustion is insufficient, the amplitude of vibration of the grate is too large, the interval is too short, short burning time. (8) much ash, ash coke particles wrapping, slow combustion, (9) a feed lot, on the grate fabric layer is too thick, not gas-solid benign mixed. (10) the feed grate or thin material less heat storage capacity is not strong.
Hot water industrial hot water biomass boiler for users to solve the "coal" urgent at present, energy conservation and building sustainable economic model has become a national priority, but only our coal utilization hovering around 30%, far below the 78 % of the international average. Steam boiler is an energy conversion device, the energy input to the boiler fuel chemical energy, electrical energy, thermal energy and other forms of high temperature flue gas, and after converting the boiler, the steam output having a certain outside thermal energy, high-temperature hot water or an organic carrier. Biomass boiler categories: biomass boilers Horizontal, vertical biomass boilers. Biomass gas thermal oil heaters, biomass steam boiler, biomass hot water boiler, biomass oil furnace. Gas-fired steam boiler burner underlying mode, two-pass configuration, the fuel combustion, the boiler operation is stable and take up less space, while the spoiler is inserted smoke tube, smoke slow speed, increase heat transfer, a high thermal efficiency, reducing user fees Therefore, improving the utilization of coal combustion has become essential. Currently, coal-fired hot water boiler control system to achieve precise control and real-time monitoring. By controlling the water temperature, the fan speed to achieve a controlled, to ensure the stable combustion furnace pressure and coal, which saves coal, but also to ensure safety. Industrial production in the boiler and heating primary energy into secondary energy of important equipment, has been widely used in industrial production and daily life. Coal-fired hot water boiler control scheme is reasonable and convenient way to monitor, steady state operation, the whole process of thoughtful service, users get a good feedback. I believe in the future, coal-fired hot water boiler intelligent control scheme can serve a wider field of industrial production, as well as hotels, schools, hotels, residential heating, bath, hot water and other fields, coal cost savings for users, improve combustion efficiency, ensure the safe operation provide a solid guarantee. Completely solve the problem of long-term accumulation of the user, the water temperature stable. Water temperature set by the ambient temperature, grate speed difference adjustment according to the actual water temperature and the set temperature of the water, i.e. adjusting the amount of coal boiler, to ensure the stability of the water temperature. Outstanding energy saving. Grate speed changes to the feedforward signal, in conjunction with flue gas oxygen content signal or the furnace temperature, blower speed control using the PID algorithm, to ensure full combustion of the coal, to improve the utilization of coal, reduce emissions of harmful substances. Excellent safety performance. To change the fan speed as a feedforward signal, the PID control calculation and induced draft fan speed according to the furnace pressure value, to ensure the stability of the furnace pressure. This paper introduces a control algorithm based on the level of intelligence of the new big jump lag PID. After control of embodiment, given a certain waiting time to observe the effect, and to determine whether further embodiment control, multi-parameter input and multiple output control mode based on performance parameters.
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