Thermodynamic method and system for cement kiln to realize cooperative treatment of domestic garbage
A technology for domestic waste and co-processing, applied in cement production, combustion methods, waste heat treatment, etc., can solve the problems of high transportation cost, heat loss, energy waste, etc., and achieve economic benefits, increase power generation, and improve economic efficiency. Effect
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[0038] Example 1
[0039] Such as figure 1 As shown, the thermal system of the cement kiln co-processing domestic waste according to the present invention includes a waste incineration system, a power generation system, a cement production system, and other auxiliary systems. The waste incineration system includes an RDF production plant 1 connected in turn. Bed incinerator 2, cyclone separator 3, superheater 4 and economizer 5. The power generation system includes supplementary steam turbine 8 and generator 9. The superheater is connected to supplementary steam turbine and generator in turn. Other auxiliary systems include The denitrification device connected to the fluidized bed incinerator, the air preheater 7 connected to the cement rotary kiln, and the waste heat boiler 10 that collects the waste heat of the cement rotary kiln. The cement production system includes a cement decomposing furnace 13, a cement burning rotary kiln 12, and a cement kiln. The material cooling secti...
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[0040] Example 2
[0041] Such as image 3 As shown, the air supply pipe of the air preheater has a trigeminal pipe structure, which is the flue gas inlet pipe of the cement calcination rotary kiln, the cooling air inlet pipe and the mixing pipe of the cement clinker cooling section. The flue gas inlet pipe of the cement calcining rotary kiln, the cooling air inlet pipe of the cement clinker cooling section and the mixing pipe are each equipped with flue gas valves. The remaining technical features are the same as in Example 1.
[0042] The cooling air in the cement clinker cooling section is used as a high-temperature gas due to the high temperature of the cement clinker, as the primary air of the fluidized bed incinerator, and has the effect of increasing the furnace inlet temperature and improving the heat utilization efficiency.
[0043] The remaining technical features are the same as in Example 1.
Example Embodiment
[0044] Example 3
[0045] Such as figure 2 As shown, the air preheater is segmented, divided into air preheater section I14 and air preheater section II15. The air preheater section I is connected to the tail flue of the fluidized bed incinerator, and the air preheater Section II is arranged in the cement clinker cooling section. The air supply pipe of the air preheater section I is a trigeminal pipe structure, which are the flue gas intake pipe of the cement calcining rotary kiln, the air preheater section II heat exchange air intake pipe and the mixing pipe. The three pipes are respectively equipped with flue gas Intake pipe control valve, heat exchange air intake pipe control valve and mixing pipe control valve. According to the fuel situation of the waste incinerator, the air intake ratio and air intake volume can be controlled in real time, so as to control the primary air volume and achieve the purpose of stable and efficient combustion.
[0046] The remaining technical fe...
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