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Treatment method of lime kiln smoke dust pollution

A lime kiln and smoke dust technology, which is applied in the field of smoke pollution control, can solve the problems that cannot be used in practice, smoke overflow, and the sealing of the separation device cannot be guaranteed, so as to realize automatic adjustment, improve operation intensity, and prevent smoke overflow. Effect

Inactive Publication Date: 2008-08-27
TIANJIN BOHUA YONGLI CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the lime kiln is running, the feeding process is intermittent. The dust collection hood is used to directly collect the dust at the discharge port, and the dust is separated and discharged through the dust removal device. Because the dust is mainly concentrated during the feeding time, and the amount of dust is small at other times, the original device does not The two special cases of feeding and non-feeding are controlled separately, which will affect the operating conditions of the lime kiln (pressure, temperature and the composition of the kiln gas produced); secondly, because the flue gas contains a large amount of CO\CO 2 , because the sealing of the separation device cannot be guaranteed, resulting in the relatively high density and difficult to diffuse flue gas entering the dust bin and other ancillary equipment and overflowing, which does not meet the safe working conditions
Therefore, although the original method has achieved the purpose of governance, the above defects cannot be used in practice.

Method used

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  • Treatment method of lime kiln smoke dust pollution
  • Treatment method of lime kiln smoke dust pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Change adjustment range: 7200m 3 / h~36000m 3 The flue gas per hour enters the bag filter through the dust collection hood, the dust and gas are separated, and the emission concentration up to the standard is ≤100mg / Nm 3 The flue gas is evacuated through the chimney. The collected dust enters the silo for recycling, and the main fan is controlled by adjusting the frequency converter to adapt to the technological operating conditions of the lime kiln. The induced air volume of the main fan is 20,000m 3 / h, by controlling the anti-suction device to ensure the pressure state of the silo, the negative pressure of the silo is 150Pa, and the smoke does not diffuse, which is compatible with the process operation, and the process operation is consistent with that when the device is not installed.

Embodiment 2

[0014] Change adjustment range: 7200m 3 / h~36000m 3 The flue gas per hour enters the bag filter through the dust collection hood, the dust and gas are separated, and the emission concentration up to the standard is ≤100mg / Nm 3 The flue gas is evacuated through the chimney. The collected dust enters the silo for recycling, and the main fan is controlled by adjusting the frequency converter to adapt to the process and operating conditions of the lime kiln. The induced air volume of the main fan is 27500m 3 / h, the pressure state of the silo is guaranteed by controlling the anti-suction device. The negative pressure of the silo is 200Pa, and the smoke does not diffuse, which is compatible with the process operation, and the process operation is consistent with that when the device is not installed.

Embodiment 3

[0016] Change adjustment range: 7200m 3 / h~36000m 3 The flue gas per hour enters the bag filter through the dust collection hood, the dust and gas are separated, and the emission concentration up to the standard is ≤100mg / Nm 3 The flue gas is evacuated through the chimney. The collected dust enters the silo for recycling, and the main fan is controlled by adjusting the frequency converter to adapt to the process and operating conditions of the lime kiln. The induced air volume of the main fan is 35000m 3 / h, the pressure state of the silo is guaranteed by controlling the anti-suction device. The negative pressure of the silo is 300Pa, and the smoke does not diffuse, which is compatible with the process operation, and the process operation is consistent with that when the device is not installed.

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Abstract

A method for controlling the smoke dust of lime kiln features that a dust collecting hood is used to capture smoke dust, a duster is then used for separating dust from fume, and the fume is finally exhausted. The frequency-variable control is applied to said duster, so its blower can be connected to DCS system for automatic regulation.

Description

technical field [0001] The invention relates to a treatment method for smoke pollution, in particular to a treatment method for lime kiln smoke pollution. Background technique [0002] When the lime kiln is running, the feeding process is intermittent. The dust collection hood is used to directly collect the dust at the discharge port, and the dust is separated and discharged through the dust removal device. Because the dust is mainly concentrated during the feeding time, and the amount of dust is small at other times, the original device does not The two special cases of feeding and non-feeding are controlled separately, which will affect the operating conditions of the lime kiln (pressure, temperature and the composition of the kiln gas produced); secondly, because the flue gas contains a large amount of CO\CO 2 , because the sealing of the separation device cannot be guaranteed, the relatively dense and difficult-to-diffuse flue gas enters the dust bin and other ancillary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B1/18C04B2/12
Inventor 吕径春刘恩义
Owner TIANJIN BOHUA YONGLI CHEM IND
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