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Energy-saving and emission-reducing device and method for industrial vertical mill

A technology of energy saving and emission reduction, vertical grinding, applied in grain processing and other directions, can solve problems such as increasing energy consumption, reducing the operating efficiency of dust collectors, and reducing the service life of dust bags, so as to reduce power consumption, reduce energy consumption, and prolong service life. Effect

Inactive Publication Date: 2014-08-20
吴海鸥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases energy consumption, reduces the operating efficiency of the dust collector and reduces the life of the dust bag

Method used

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  • Energy-saving and emission-reducing device and method for industrial vertical mill
  • Energy-saving and emission-reducing device and method for industrial vertical mill
  • Energy-saving and emission-reducing device and method for industrial vertical mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] Embodiment: a kind of energy saving and emission reduction device for industrial vertical mill, such as figure 1 As shown, it comprises a hot blast stove 1, a vertical mill 2, a dust collector 3, a blower fan 4, an air regulating valve 5 and a chimney 6 connected in sequence by pipelines, and a three-way pipe 7 is provided between the blower fan 4 and the chimney 6, The two ends of the three-way pipe 7 are respectively connected to the fan 4 and the chimney 6, and the other end of the three-way pipe 7 is connected to the air outlet of the hot blast stove 1 through the return air pipe 8. The air regulating valve 5 is arranged in the three-way pipe 7, and the air regulating valve 5 is a three-way ball valve, a U-shaped pipe 9 is arranged on the return air pipe 8, and a heat exchanger is arranged at the U-shaped pipe 9. The cold end 10 of the heat exchanger is installed in the U-shaped pipe 9, and the heat exchanger The hot end 11 is installed at the outlet position of the...

example 1

[0053] Example 1, taking 600,000 tons of slag vertical mill as an example

[0054] The first step, parameter setting: the initial tail air volume is zero, the working temperature of the dust collector is 90 degrees, the preset dew point temperature is 70 degrees; the moisture content of raw materials is 10%; the air volume of the hot blast furnace is 35000M 3 / hour, wind temperature 400 degrees; system output: 90 tons / hour, product water content: 3 / hour, the air temperature at the outlet of the dust collector is 90 degrees; the annual average temperature of the environment is 20 degrees, and the air humidity is 17g / M 3 .

[0055] According to the data, set the air density D to be 1.293kg / M 3 , the relationship between air density D and air temperature T is:

[0056] D=1.293×(273.16 / (273.16+T))

[0057] Humid air heat capacity C:

[0058] C=1.006+1.88 water vapor content (kg / M 3 ) / air density (kg / M 3 )

[0059] Dew point temperature compensation: 5 degrees, (it vari...

example 2

[0079] In the first step, this example is implemented on the basis of example 1 reaching balance, and the preset parameters are the same as those of example 1.

[0080] In the second step, the humidity of the raw material changes, from 10% to 8%, resulting in a change in the moisture content of the airflow inside the vertical mill system. A decrease in the reading of the humidity sensor at the inlet of the dust collector means that the temperature at the inlet and outlet of the dust collector can be appropriately lowered. The extent of the drop is determined by the temperature and humidity sensors at the outlet of the dust collector.

[0081] The moisture content of the raw material decreased by 2%, and the contribution to the moisture content of the airflow in the vertical mill was reduced by 6.143g / M 3 . According to the principle that the dust collector does not condense, refer to Table 1, and use the interpolation method to calculate, the reading of the humidity sensor c...

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PUM

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Abstract

The invention discloses an energy-saving and emission-reducing device and method for an industrial vertical mill. The energy-saving and emission-reducing device is mainly characterized in that a U-shaped pipe is arranged on an air return pipe, a heat exchanger is arranged at the U-shaped pipe, a cold end of the heat exchanger is arranged in the U-shaped pipe, and a hot end of the heat exchanger is arranged at an outlet of the U-shaped pipe. The U-shaped pipe is matched with the heat exchanger for dehumidifying tail gas so as to stabilize the water-steam balance state of the energy-saving and emission-reducing device. In addition, one set of temperature and humidity sensor is respectively arranged at two ends of the U-shaped pipe, the inlet / outlet end of a dust collector and an outlet of a hot blast heater, and the temperature and humidity sensors are connected with controllers of the hot blast heater, an air regulating valve and the heat exchanger through a programmable central processing unit. According to the programmable central processing unit, through comprehensive analysis and an algorithm, the running temperature of the whole energy-saving and emission-reducing device is reduced possibly, and the tail gas emission amount is reduced. The energy consumption of the whole energy-saving and emission-reducing device is greatly lowered, and the hot blast heater can save fuel by more than 20 percent.

Description

technical field [0001] The invention relates to a vertical mill system, in particular to an energy-saving and emission-reducing device and method for industrial vertical mills. Background technique [0002] Industrial vertical mills have the advantages of simple process, high grinding efficiency, low energy consumption, large stand-alone capacity, and small equipment footprint. They are rapidly replacing traditional grinding processes and are widely used in building materials, metallurgy, coal and other industries. [0003] During the production process of the vertical mill, the material enters the vertical mill, is squeezed, crushed, and ground between the grinding roller and the grinding disc. The ground material is blown by the hot air from the hot blast stove and sent to the powder classifier located on the upper part of the vertical mill. The powder classifier divides the ground material into coarse powder and fine powder. The fine powder is taken to the dust collector...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/00
Inventor 吴海鸥潘康
Owner 吴海鸥