Bypass exhaust purification system and method for cement kiln
A technology for bypassing ventilation and purification systems, applied to chemical instruments and methods, separation methods, climate change adaptation, etc.
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Embodiment 1
[0032] see Figure 1-Figure 4 , a cement kiln bypass air purification system, comprising a cement kiln smoke chamber 1, the flue gas outlet of the cement kiln smoke chamber 1 is connected with a quenching chamber device 2, and the gas outlets of the quenching chamber device 2 are connected in series Connect the dust collector 3, fan 4, waste gas treatment system 5 and chimney 6; the inside of the quench chamber is provided with an ammonia injection device 7, and the outlet of the quench chamber 2 is equipped with a lime injection device 8. Dust collector 3, blower fan 4, exhaust gas treatment system 5 and chimney 6 are known equipment in the art, and it is recommended to use a bag filter for the dust collector, and the fan is a centrifugal fan. The flue gas taken out of the smoke chamber 1 passes through the quench chamber settling chamber 2-1 to reduce dust, and then passes through the ammonia injection device 7 for denitrification, after cooling down in the quench chamber, ...
Embodiment 2
[0052] see Figure 5 , the quenching chamber device described in this example is used in a cement production line because of waste disposal and chlorine element exceeding the standard, so a bypass scheme needs to be set up. According to the material balance, it is calculated that the air discharge volume is 7%, and the rotary kiln is rich in harmful components. The hot flue gas needs to be taken out, and the outlet temperature of the quench chamber is controlled at 200-250°C. Increase emergency blower fan 9, further reduce risk. Ambient air enters the quench chamber through the blower as the cooling medium. After heat balance calculation, the required diameter of the quenching chamber (that is, the diameter of the outer cylinder) is 1.3m, and the entrance of the cold air is relatively large, and the volute entry method is adopted. After the cold air enters the quenching chamber, it gradually enters the inner cylinder and is forced to mix with the hot air, and then passes thr...
Embodiment 3
[0058] see Figure 6 , compared with Embodiment 1, a dust collection cyclone 10 is arranged between the air outlet of the quench chamber device 2 and the dust collector 3, and the dust discharge port of the dust collection cyclone 10 is connected with the decomposition of the cement kiln system. Furnace connected. After the quench chamber device 2, a dust collection cyclone 10 is added for coarse dust collection. The dust collection cyclone 10 collects ash particles that are relatively coarse and carry less harmful components into the decomposition furnace, and the fine powder collected by the dust collector 3 carries more Harmful components are discharged out of the kiln system. At this time, the amount of ash returned by the dust collector decreases, and the total amount of hot air taken out of the smoke chamber for bypass air release increases by 5-50%. The flue gas from the dust collecting cyclone 10 enters the dust collector 3 . The flue gas taken out of the quench chamb...
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Abstract
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