A method for checking and controlling the abnormality of gas flow in tobacco shred combustion furnace
A technology of gas flow and control method, applied in the direction of flow control, flow control using electric devices, non-electric variable control, etc., can solve the problem of unsafe combustion furnace, lack of gas valve opening and gas flow matching inspection process, Issues such as lack of controls
Active Publication Date: 2019-04-09
CHINA TOBACCO SHANDONG IND
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Problems solved by technology
[0005] However, during the silk production process, the ignition and heating process of the combustion furnace sometimes occurs. When the main gas valve of the combustion furnace is opened, the opening of the three-link regulating valve gradually increases. Sometimes the opening reaches 60, and the detection of the gas flow meter shows that it is 0 M 3 / H. At this time, the combustion furnace is in a serious unsafe operating state, and the entire control system has a large safety hazard. The combustion furnace lacks a matching inspection process between the opening of the gas valve and the gas flow, and also lacks corresponding control measures for abnormal conditions.
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[0021] The present invention will be described in detail below in conjunction with the drawings:
[0022] due to figure 1 The three-link control valve for the heating of the medium combustion furnace is a complex mechanism control valve. When the main gas valve of the combustion furnace is opened and the opening of the three-link control valve gradually increases, the gas flowmeter does not detect the flow, which may be a gas control adjustment. Loose connection between the valve and the mechanical structure or the lack of smooth gas supply in the gas pipeline will cause the above phenomenon to occur.
[0023] Therefore, the present invention provides a method for checking and controlling abnormal gas flow of a tobacco silk burning furnace, which includes:
[0024] (1) Test and verify the safety signal conditions of the combustion furnace: determine whether the gas pressure, combustion air pressure and combustion air operation signals of the combustion furnace are normal. If so, the...
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The invention discloses a method for verifying and controlling abnormal gas flow of a combustion furnace for tobacco shred production, which comprises the steps of: detecting and verifying the safety signal condition of the combustion furnace; detecting and verifying a fire burning signal; allowing the combustion furnace to enter a quick temperature-rising process, opening a main gas electromagnetic valve and opening a three-linkage regulating valve; detecting and verifying a gas flow signal; closing the gas electromagnetic valve, terminating the temperature-rising process of the combustion furnace and outputting a gas flow abnormal alarm signal of the combustion furnace; and waiting for manual rest and entering the next ignition temperature-rising process. The method has the advantages that when a combustion furnace gas three-linkage control valve connecting mechanism and electrical control are non-synchronous or gas pipeline supply is abnormal, the temperature-rising process of the combustion furnace can be terminated in time, so the great electrical control potential safety hazard which exists during operation of the combustion furnace is solved, and conditions are created for guaranteeing the processing quality of shred producing products.
Description
Technical field [0001] The invention belongs to the technical field of a burning furnace for tobacco silk making, and in particular relates to a method for checking and controlling abnormal gas flow of a burning furnace for tobacco silk making. Background technique [0002] In the tobacco silk production process, airflow drying has a wide range of applications. Among them, the combustion furnace is used as a heat source supply device for airflow drying. The stability and reliability of its work play an important role in the safe operation of the combustion furnace. [0003] The normal operation of the combustion furnace is mainly divided into five processes: startup, furnace purging, ignition, heating, cooling and shutdown. Among them, ignition and heating are the main links in the work of the combustion furnace, and are also the key links for the safe operation of the combustion furnace. [0004] figure 1 It is a schematic diagram of the working principle of ignition and heating o...
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IPC IPC(8): F26B23/02G05D7/06A24B3/04
CPCA24B3/04F26B23/02G05D7/0617
Inventor 孙钦兰韩勇程林峰髙卫尹旭梅段三青任建政李军刘伟达张表一马聪孝
Owner CHINA TOBACCO SHANDONG IND