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Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles

A technology of precalcining kiln and processing belt, which is applied in the field of precalcining kiln tail system outside the cement kiln that can process combustible raw materials, and achieves the advantages of improving system operation rate, saving high-quality mine resources, strong operability and practicability. Effect

Active Publication Date: 2009-12-23
TIANJIN CEMENT IND DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no technical solution for the large-scale treatment of combustible biomass at home and abroad

Method used

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  • Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles
  • Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles
  • Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles

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Experimental program
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Effect test

Embodiment 1

[0023] see figure 1 and image 3 , applying the single series cement kiln external precalcining kiln tail system of the present invention, including feeding device (not shown in the figure), five-stage cyclone preheater, calciner 8, tertiary air pipeline 11, rotary kiln 13, raw meal Pre-calcining furnace 5, the upper part of the raw material pre-calcining furnace 5 is provided with a material airflow outlet 21, the bottom is provided with an airflow inlet 14, and the lower part is provided with a material inlet 16, and the airflow inlet 14 is connected to the air outlet of the fourth-stage cyclone preheater 7 Connect, the air outlet with material is connected to the air inlet pipe of the third-stage cyclone preheater 4, and the material inlet is connected to the discharge port of the second-stage cyclone preheater. The feeding device is provided with a raw meal distributing device 1 . The raw material pre-calcining furnace 5 is connected with the tertiary air duct 11 through...

Embodiment 2

[0036] A cement kiln external pre-decomposition kiln tail system capable of processing raw meal with combustibles. The air inlet of the raw meal pre-calciner is connected to the air outlet of the second-stage cyclone preheater, and the air outlet of the raw meal pre-calciner is connected to the air outlet of the second-stage cyclone preheater. The air inlet pipe of the first-stage cyclone preheater is connected, and the material inlet of the raw meal precalciner is connected with the feeding device. When processing cement raw meal with combustibles, the raw meal is directly fed into the raw meal precalciner, and exchanges heat with the airflow from the second-stage cyclone preheater. After the combustibles in the raw meal are fully burned, it enters the first stage Cyclone preheater, followed by the same structure as conventional kiln tail system to process cement raw meal. Other structures are the same as in Embodiment 1, and the working principle is also the same as in Embod...

Embodiment 3

[0038] A cement kiln external pre-decomposition kiln tail system capable of processing raw meal with combustibles. The air inlet of the raw meal pre-calciner is connected to the air outlet of the third-stage cyclone preheater, and the air outlet of the raw meal pre-calciner is connected to the air outlet of the third-stage cyclone preheater. The air inlet pipe of the second-stage cyclone preheater is connected, and the feeding device is connected with the material inlet of the raw meal precalciner or the air inlet pipe of the first-stage cyclone preheater. When the feeding device is connected to the material inlet of the raw meal pre-calciner, the feeding device will directly send the cement raw meal with combustibles to the raw meal pre-calciner. After the combustibles in the raw meal are fully burned, they enter the second stage. The cyclone preheater is used for gas-solid separation, and other structures are the same as in Embodiment 1, and the working principle is also the ...

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Abstract

The invention discloses a predecomposition kiln tail system outside of a cement kiln, which can treat raw materials with combustibles. The kiln tail system comprises a multistage whirlwind preheater and a raw material precalcination furnace, wherein the upper part of the raw material precalcination furnace is provided with a belting air flow outlet, the bottom part thereof is provided with an air flow inlet and the lower part thereof is provided with a material inlet; the air flow inlet is connected with an air outlet of an N-stage whirlwind preheater of the multistage whirlwind preheater; the belting air flow outlet is connected with an N-1-stage whirlwind preheater; a material inlet is connected with an N-2-stage whirlwind preheater or directly connected with a feeding device. The predecomposition kiln tail system can effectively utilize the cement raw materials with combustibles to calcine cement clinker, fully consider heating characteristics of the burning of the combustibles, organically combine the functional area divisions of all parts of the preheater of the predecomposition technique, realize the new breakthrough of a novel dry way predecomposition kiln tail system for treating the raw materials with combustibles and calcining cement clinker, improve the running rate of the system and expand the utilization of unconventional low-quality raw material resources.

Description

technical field [0001] The invention relates to a system used in the cement industry for raw meal preheating, raw meal decomposition and fuel combustion, in particular to a cement kiln external pre-decomposition kiln tail system capable of processing combustible raw materials. Background technique [0002] Cement clinker is produced by high-temperature calcination of cement raw meal after preheating and decomposition. Cement raw meal is mainly formed by grinding and homogenizing calcareous raw materials, clay raw materials and correction raw materials. The current cement clinker production process generally adopts pre-decomposition technology outside the kiln. This technology is also the most advanced cement production technology today. Its characteristics are: a suspension preheater system with pre-decomposition outside the kiln. It is mainly composed of calciner, It is composed of multi-stage cyclone preheater and connecting air pipe and material pipe. The pulverized coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B19/04C04B7/36
CPCF27D17/004C04B7/434F27B7/20F27D17/008F27B7/2033F27B7/205
Inventor 俞为民陶从喜彭学平肖秋菊陈昌华李振华刘继开
Owner TIANJIN CEMENT IND DESIGN & RES INST
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