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Sealing gas layout structure of coal grinding mill

A technology of arrangement structure and coal mill, applied in grain processing and other directions, can solve the problems of increasing fuel consumption and nitrogen consumption, and achieve the effect of reducing energy consumption level and ensuring stable operation.

Active Publication Date: 2014-12-17
GUIZHOU TIANFU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process consumes a lot of nitrogen, which in turn increases fuel consumption

Method used

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  • Sealing gas layout structure of coal grinding mill

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Embodiment

[0023] Embodiment: As shown in Figure 1, a rotary separator 2, a grinding disc 3 and an ink roller 4 are provided on a coal mill 1, and a mixing port of limestone 7 and coal powder 8 is connected to the coal mill 1, and on it It is connected with the pulverized coal outlet 9 after grinding. At the same time, in order to realize the normal operation of the coal mill 1, the coal mill 1 is connected with auxiliary sealing gas, circulating air system and hot air system, wherein the sealing gas includes nitrogen sealing and air sealing , in order to prevent coal leakage at the slit of the coal mill 1, the pressure strength of the nitrogen seal 5 and the air seal 6 connected to the coal mill 1 is 2KPa higher than the pressure inside the coal mill 1. A nitrogen seal 5 is provided at the static and dynamic rings of the rotary separator 2 of the coal mill 1 , and an air seal 6 is provided at the static ring of the grinding disc 3 . At the same time, in order to ensure that the oxygen ...

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Abstract

The invention discloses a sealing gas layout structure of a coal grinding mill, which comprises a coal grinding mill (1), wherein a rotary gas separator (2), a grinding disc (3) and a grinder roll (4) are arranged on the coal grinding mill (1), auxiliary sealing gas and a circulating air system and a hot air system are connected with the coal grinding mill (1), nitrogen seal is arranged at a dynamic ring and a static ring of the rotary gas separator (2) and air sealing (6) is arranged at a static ring of the grinding disc (3). The adoption of the sealing gas layout structure can reduce the amount added into a seal air fan of the coal grinding mill without affecting the sealing effect, can reduce the use amount of nitrogen gas to improve sealing air pressure, and at the same time can reduce fuel consumption and protect the coal grinding mill, so as to overcome the shortcomings that the sealing gas layout structure in the prior art has high energy consumption and excessive input cost, has an impact on normal operation, is harmful to the environment and the like.

Description

technical field [0001] The invention relates to a sealing gas arrangement structure of a coal mill, belonging to the technical field of coal mill equipment. Background technique [0002] The coal grinding unit is the pulverizing section of the coal gasification device. The crushed coal with a particle size that meets the requirements is transported into the boundary area through the storage and transportation belt, and is mixed with limestone in a certain proportion under the condition of an inert environment and a slight negative pressure. Grinding and drying, the pulverized coal with qualified particle size is sent to the subsequent unit for use. The crushed coal and limestone added in the upstream process are ground in the coal mill, and the high-temperature dry gas produced by the combustion of the fuel gas in the hot blast stove dries the pulverized coal and takes it out of the coal mill. Because the particle size of the ground coal is very small, it is To ensure the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C15/00
Inventor 陈毓民王波雷永红陈静
Owner GUIZHOU TIANFU CHEM