A safety control method for chemical heating furnace
A technology for safety control and heating furnaces, applied in furnace control devices, lighting and heating equipment, furnaces, etc., can solve problems such as increasing the amount of fuel, prevent incomplete combustion, prevent flash explosion accidents, and reduce unplanned parking. Effect
Active Publication Date: 2018-09-14
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
This type of method has obvious disadvantages, that is, if there is no personnel intervention after the flame is extinguished and the furnace temperature drops, the control system will automatically increase the amount of fuel, causing more serious consequences
Method used
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[0010] The present invention provides a safety control method for chemical heating furnaces. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0011] In order to describe the safety control method of the present invention in more detail, it uses the safety control system of the safety control method of the present invention, such as figure 1 As shown, it includes a heating furnace 1, wherein a serpentine material pipe 2 is arranged in the heating furnace 1, and the material is fully heated in the heating furnace 1 through the serpentine material pipe 2, and the outlet end of the serpentine material pipe 2 is provided with a The material temperature indicator 3, the lower part of the heating furnace 1 is pr...
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The invention provides a safety control method used for a chemical heating furnace. When a material temperature indicating instrument detects that the temperature of outflow materials falls, the material temperature indicating instrument transmits signals to a controller; the controller judges whether a draught fan stop signal or an air flow rate decreasing signal exists, and if relevant signals do not exist, the operation of increasing the fuel flow rate is conducted according to an original procedure; if the controller judges that any of the draught fan stop signal or the air flow rate decreasing signal exists, the fuel flow rate is not increased, and if only the air flow rate decreasing signal exists, the fuel flow rate is decreased correspondingly according to an air flow rate decreasing index. A draught fan stop control system and an air flow rate decreasing control system are combined for use, and it can be guaranteed that after one control system is disabled, the other safety control measure can be used for ensuring the safety of the heating furnace, and flash-explosion accidents are avoided; the intrinsic securitization level of the heating furnace can be greatly raised; non-planed stop is reduced; and safe and stable operation of the heating furnace is guaranteed.
Description
technical field [0001] The invention relates to the field of petrochemical industry, in particular to a safety control method for a chemical heating furnace. Background technique [0002] In petrochemical production, many materials need to be heated by fuel, gas and oil-gas dual-purpose heating furnaces, and fuel-gas heating furnaces involve combustible gas or steam mixed with air during operation. Air feed fluctuations, fuel fluctuations, or instrumentation equipment failures may cause the furnace flame to go out, causing flash explosion accidents in the furnace, resulting in unplanned shutdown and loss of equipment and personnel. Chemical heating furnaces are generally equipped with an automatic control system for process material temperature. When the material temperature drops, the fuel flow rate is automatically increased. Among the heating furnace accidents that occurred in recent years, many of them were caused by natural ventilation after the blower / induced fan stopp...
Claims
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IPC IPC(8): F27D19/00
CPCF27D19/00F27D2019/0006F27D2019/0034
Inventor 张帆徐伟石宁费轶王振刚
Owner CHINA PETROLEUM & CHEM CORP