Clinker production line for novel dry process cement kiln and denitration process method for clinker production line

Abstract

The invention discloses a clinker production line for a novel dry process cement kiln. Pulverized coal in a pulverized coal pipeline which is communicated with the tail of the kiln is divided into two channels by a first pulverized coal distributor, wherein one channel is communicated with a column body on the upper part of a decomposition furnace, and the pulverized coal is divided into two channels again by a second pulverized coal distributor and symmetrically enters the column body on the upper part of the decomposition furnace; and the other channel is communicated with a cone on the lower part of the decomposition furnace, and the pulverized coal is divided into two channels again by the second pulverized coal distributor and symmetrically enters the cone on the lower part of the decomposition furnace. The invention also provides a denitration process method adopted by the production line. By the technical scheme, thermal NOx generated in the kiln is decreased and reduced, and the generation of fuel NOx is inhibited, so that NOx can be effectively reduced from the source; and after process improvement, operation parameters are optimized, the operation quality and stability of the system are promoted, and a certain energy-saving effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of cement production, and relates to the production technology of a new type of dry process cement kiln. More specifically, the invention relates to a new type of dry process cement kiln clinker production line. In addition, the invention also relates to the denitrification process of the production line . Background technique [0002] 1. Technical background of denitrification in cement clinker production line: [0003] At present, my country has nearly 5,000 cement enterprises, and its output has ranked first in the world for many years. In 2011, the country's cumulative total cement output was 2.09 billion tons, of which the proportion of new dry process cement reached 80.9%. By the end of 2011, more than 1,500 new dry-process cement production lines have been built using domestic technology and equipment. [0004] The emission reduction of nitrogen oxides has become a major problem restricting my coun...

AI Technical Summary

Problems solved by technology

[0037] (1) The skinning phenomenon in the reduction area is serious, which affects the normal and stable operation of the system, making it difficult to maintain production, resulting in the inability to apply this technology or dismantle the technical facilities in actual production;

[0038] (2) Strict requirements on the quality of raw materials and fuels, especially anthracite with low volatile content is less effective;

[0039] (3) Strict requirements on process operation, need to control kiln tail O 2 The content is below 2%, which is difficult to achieve in actual operation;

[0040] (4) It is necessary to add a separate coal feeding metering system and a larger coal feeding power;

[0041] (5) The denitrification efficiency is unstable, and it is difficult to reach 30%;

[0042] (6) The denitrification transformation has a large workload, a long time, a large investment, and an increase in operating costs

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