Preheating and replacing method for pyrolysis process of rotary kiln and upgrading system
By introducing nitrogen gas for preheating and purging in the rotary kiln, the problems of long start-up time and complicated operation in the pyrolysis process of pulverized coal rotary kilns are solved, enabling rapid start-up and stable system operation, and reducing costs.
CN121574741APending Publication Date: 2026-02-27INNER MONGOLIA ZHUOZHENG COAL CHEM CO LTD +1
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Patent Information
- Application Number
- CN202610064621.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-19
- Publication Date
- 2026-02-27
AI Technical Summary
Technical Problem
The existing pulverized coal rotary kiln pyrolysis process suffers from long start-up times and cumbersome operation, and lacks effective preheating and replacement methods.
Method used
During startup, preheating and purging are achieved by introducing replacement nitrogen gas into the rotary kiln, which, combined with the system's circulating airflow, eliminates the need for the traditional separate preheating and purging procedures.
Benefits of technology
It effectively shortens start-up time, optimizes operating procedures, saves investment and operating costs, and ensures long-term stable operation of the system.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a rotary kiln pyrolysis process preheating and replacing method which comprises the following steps: replacing and preheating an upgrading system when a rotary kiln is started, performing low-load operation on the rotary kiln, heating the rotary kiln by a rotary kiln hot blast stove and a flue gas fan, closing a pipeline valve from a dry gas fan to a first dust remover, and performing low-load operation on the rotary kiln; a rotary kiln nitrogen replacement valve is slightly opened, nitrogen enters the rotary kiln through a dry gas guide screw for replacement and heat removal, an oil and gas pipeline is preheated, direct cooling tower spraying cooling water and indirect cooling tower circulating cooling water are put into use, a coal gas fan is started for system circulation, and an electrical tar precipitator outlet is opened to a rotary kiln starting line valve; the invention further discloses a rotary kiln quality improvement system, the rotary kiln pyrolysis process preheating and replacement method is adopted, the start-up time is effectively shortened, the investment and operation cost is saved, and meanwhile a foundation is laid for long-period stable operation of the system.
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