Chlorine bypass equipment and its operating method, cement clinker manufacturing apparatus, and method for manufacturing cement clinker.

Abstract

To provide a chlorine bypass facility which can be stably operated.SOLUTION: A chlorine bypass facility 90 comprises: an extraction port 21A for extracting kiln exhaust gas from a kiln bottom 52 of a cement kiln 50, a rising duct 42, or between them; and a classification section 22 for separating coarse dust of raw material dust from mixed gas obtained by merging the extracted gas extracted from the extraction port 21A and the exhaust gas generated in a combustion furnace 32 to obtain derived gas containing fine powder of the raw material dust. The mixed gas is obtained by merging extracted gas having a temperature lower than that of gas extracted through the extraction port 21A with exhausted gas having a temperature higher than that of the extraction gas.SELECTED DRAWING: Figure 1

Claims

1. An exhaust port for extracting kiln exhaust gas from the bottom of a cement kiln, the rising duct, or the space between these, An extraction pipe through which the extracted gas containing raw material dust extracted from the extraction port flows, A chlorine bypass apparatus comprising: a classification unit that separates coarse particles of the raw material dust from a mixed gas obtained by combining the extracted gas, which has a lower temperature than when extracted at the extraction port by flowing through the extraction pipe, and the exhaust gas produced in a combustion furnace, which has a higher temperature than the extracted gas, in order to obtain a discharge gas containing fine particles of the raw material dust.

2. The chlorine bypass apparatus according to claim 1, wherein the classification unit is configured to discharge the discharged gas having a temperature of 770°C or higher.

3. A desalination furnace that generates pyrolysis gas by heat-treating plastic, The combustion furnace comprises the pyrolysis gas and The chlorine bypass equipment according to claim 1 or 2, wherein the exhaust gas generated in the combustion furnace contains chlorine.

4. The chlorine bypass equipment according to any one of claims 1 to 3, further comprising a cooling gas introduction unit that introduces a cooling gas such that a swirling flow is generated along the inner wall surface of the flow path through which the discharged gas discharged from the classification unit flows.

5. A cement clinker manufacturing apparatus comprising a chlorine bypass facility as described in any one of claims 1 to 4.

6. A method for producing cement clinker using the cement clinker production apparatus described in claim 5.

7. An extraction process to obtain extracted gas by extracting kiln exhaust gas generated when cement raw materials are fired in a cement kiln, The system includes a classification step of separating coarse raw material dust from a mixed gas obtained by combining the extracted gas and the exhaust gas generated in the combustion furnace to obtain a discharge gas containing fine raw material dust. A method for operating a chlorine bypass system, comprising combining the extracted gas, which has a lower temperature than when extracted in the extraction process, with the exhaust gas, which has a higher temperature than the extracted gas, to obtain the mixed gas.

8. A method for operating a chlorine bypass facility according to claim 7, comprising a preheating step of preheating a classification unit, which separates the coarse powder from the mixed gas to obtain the output gas containing the fine powder, using the exhaust gas before starting the classification step.

9. A cooling gas introduction step involves introducing a cooling gas in such a way that a swirling flow is generated in the passage through which the aforementioned discharged gas flows. A method for operating a chlorine bypass facility according to claim 7 or 8, comprising a dust recovery step of recovering dust contained in a gas containing the discharged gas and the cooling gas.

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