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Pneumatic conveying equipment for chlorine bypass dust and cement kiln exhaust gas treatment system equipped with this equipment
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A technology for pneumatic conveying and waste gas treatment. It is applied in auxiliary pretreatment, chemical instruments and methods, and dispersed particle separation. It can solve problems such as pipeline blockage, difficulty in removing dust from chlorine bypass, and blockage, and achieve the effect of reducing blockage.
Inactive Publication Date: 2016-11-30
DENKA CO LTD
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However, since the chlorine bypass dust has deliquescence properties, there is a problem that if the wall surface temperature of these storage tanks is lowered, the deliquescence will cause clogging of the pipes, making it difficult to remove the chlorine bypass dust from the storage tanks.
[0013] However, the method of slurrying chlorine bypass dust as described in JP 2000-354838 A is considered to easily cause corrosion and clogging of the water spray nozzles in the mill.
As a result, it is difficult to control the amount of sprayed water from the nozzle, and fluctuations in the amount of sprayed water are likely to cause fluctuations in the temperature at the outlet of the mill, which may also affect fluctuations in cement quality
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Embodiment 1
[0067] Make figure 1 The cement kiln exhaust gas treatment system in the embodiment is started for one week under the following operating conditions.
[0068]
[0069] (1) Cement kiln exhaust gas at the inlet of the exhaust pipe 702:
[0070] -Temperature: 900~1100℃,
[0071] -Atmospheric pressure dew point: 60~69℃
[0072] - Air volume: 150[m 3 N / min]
[0073] (2) Air for cooling and dehumidification:
[0074] -External air (temperature: 2 to 16°C, atmospheric dew point: -5 to 11°C)
[0075] - The air volume sent by the blower to the exhaust pipe 702: 250 [m 3 N / min]
[0076] -The air volume sent by the blower to the cooler 705: 320[m 3 N / min]
[0077] (3) The gas flow rate at the outlet of the exhaust pipe 702: 15m / s
[0078] (4) Cement kiln waste gas flowing into inlet 101:
[0079] -Gas temperature: 58~82℃
[0080] -Atmospheric pressure dew point: 30~39℃
[0081] (5) Dust collector 103 of the first dust collection tank 100: bag filter
[0082] (6) Whether t...
Embodiment 2
[0106] In the same manner as in Example 1, except that the operating conditions were changed as follows, figure 1 The cement kiln exhaust gas treatment system in the embodiment started for one week.
[0107]
[0108] (1) Air for cooling and dehumidification:
[0109] -External air (temperature: 2 to 16°C, atmospheric dew point: -5 to 11°C)
[0110] - The air volume sent by the blower to the exhaust pipe 702: 100 [m 3 N / min]
[0111] - The air volume sent by the blower to the cooler 705: 100[m 3 N / min]
[0112] (2) The gas velocity at the outlet of the exhaust pipe 702: 6m / s
[0113] (3) Cement kiln waste gas flowing into inlet 101:
[0114] -Gas temperature: 230~270℃
[0115] -Atmospheric pressure dew point: 43~52℃
[0116] (4) Gas temperature in the pressurized tank 200: 65-98°C
[0117] As a result of starting the cement kiln exhaust gas treatment system under the above operating conditions, there is almost no dust adhesion on the first pipeline 105 , the pressurize...
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Abstract
The invention provides a chlorine bypass dust conveying device capable of reducing pipeline blockage in the chlorine bypass dust conveying process. A pneumatic conveying device for dust collected from cement kiln exhaust gas, comprising: a first dust collection tank having an inlet and an outlet of cement kiln exhaust gas, and a dust collector for collecting dust from cement kiln exhaust gas , and the outlet of the collected dust; a pressurized tank, which has an inlet for the dust from the first dust collection tank, an air inlet, and an outlet for pneumatic conveying of the dust, and the pressurized tank is used for pneumatically conveying the dust by compressed air conveying the dust; an air supply source which supplies dried compressed air having an atmospheric pressure dew point of -35°C or less to the pressurized tank; and a second dust collection tank having the dust pneumatically conveyed from the pressurized tank through a second pipeline Inlet, dust collector for collecting dust, and air outlet.
Description
technical field [0001] The invention relates to pneumatic conveying equipment for chlorine bypass dust. In addition, the present invention also relates to a cement kiln exhaust gas treatment system equipped with the pneumatic conveying equipment for chlorine bypass dust of the present invention. Background technique [0002] The exhaust gas of cement kiln equipment contains volatile components such as alkaline chloride and alkaline sulfate. These volatile components circulate in the cement kiln equipment between the preheater and the kiln, while gradually concentrating and blending into the clinker, which adversely affects the quality of cement, and also adheres to the preheater, etc. as a coating Therefore, part of the waste gas is extracted from the volatile component concentration area near the kiln tail of the cement kiln (Japanese Patent Application Publication No. 9-175847, Japanese Patent Application Publication No. 11- 35355, Japanese Patent Laid-Open No. 2001-3353...
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