Internal denitrification and wet desulfurization device for flue gas of coal-fired boiler
A technology for coal-fired boilers and wet desulfurization, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve environmental pollution and other problems, and achieve the effects of pollution avoidance, high reliability, and high desulfurization efficiency
Inactive Publication Date: 2016-11-23
WUXI SHENGJIE ENVIRONMENTAL PROTECTION TECHCO LTD
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[0008] To sum up, the flue gas temperature of coal-fired boilers is mostly between 120 and 160°C, and the flue gas environment conditions are relatively harsh, such as high dust concentration, high oxygen content in flue gas, and high moisture content. , high concentration of heavy metals, etc., in the case of using high-sulfur coal, the flue gas SO 2 The emission concentration reaches 5000~6000mg / Nm 3 , In addition, the emission concentration of NOx reaches 600-800g / Nm 3 , causing serious pollution to the environment
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[0017] The present invention will be further described below in conjunction with the accompanying drawings.
[0018] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, the present invention is a denitrification wet desulfurization device in a coal-fired boiler flue gas furnace, including a coal-fired boiler 1, a flue gas online monitoring and control device 43, a bag filter 2, a fan 3, a desulfurization tower 6, and a dehumidification and purification tower 17. Chimney 34, characterized in that: the coal-fired boiler 1 is sequentially connected with flue gas online monitoring and control device 43, bag filter 2, fan 3, desulfurization tower 6, dehumidification and purification tower 17, and chimney 34, and the flue gas is online The monitoring and control device 43 is connected to the frequency conversion rotary feeder 38, and the upper part of the frequency conversion rotary feeder 38 is connected to the electronic spiral scale 37, and the electronic spiral scal...
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An internal denitrification and wet desulfurization device for flue gas of a coal-fired boiler comprises the coal-fired boiler, an online flue gas monitoring control device, a bag-type dust collector, a fan, a desulfurizer, a dehumidification and purification tower and a chimney. The device is characterized in that the coal-fired boiler is sequentially connected with the online flue gas monitoring control device, the bag-type dust collector, the fan, the desulfurizer, the dehumidification and purification tower and the chimney, the online flue gas monitoring control device is connected with a variable-frequency rotary feeder, the upper side of the variable-frequency rotary feeder is connected with an electronic screw scale connected with a discharger, the discharger is connected with a urea granule bin, the lower side of the variable-frequency rotary feeder is connected with a mixing generator, one way of the mixing generator is connected with a high-pressure Roots blower, the other way is connected with a urea granule jet orifice through a urea granule jet pipe, and the urea granule jet orifice is located above the side wall of a furnace of the coal-fired boiler. With the adoption of the device, harmful pollutants such as SO2, NOx and the like in the flue gas of the coal-fired boiler can be removed, up-to-standard emission the flue gas is realized, and environmental pollution is avoided.
Description
technical field [0001] The invention relates to a denitrification wet desulfurization device in a flue gas furnace of a coal-fired boiler, specifically for purifying the flue gas produced by a coal-fired boiler, and belongs to the technical field of environmental protection. Background technique [0002] At present, the pulverized coal used in coal-fired boilers contains sulfur. During the high-temperature firing process at 1200°C to 1500°C, the sulfur in the raw materials reacts chemically to form SO 2 Into flue gas, SO emitted from coal-fired boilers 2 accounted for domestic SO 2 A large part of the total emissions, according to the analysis of the flue gas of coal-fired boilers, has the following characteristics: [0003] (1) The concentration of SO2 in the flue gas of coal-fired boilers changes very quickly and the concentration fluctuates greatly; [0004] (2) The temperature of flue gas emitted by coal-fired boilers usually fluctuates between 120°C and 160°C; [00...
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Login to View More IPC IPC(8): B01D53/81B01D53/56B01D53/78B01D53/50
Inventor 戴顺国
Owner WUXI SHENGJIE ENVIRONMENTAL PROTECTION TECHCO LTD