Control method of safety protection system for preventing liquid ammonia diffusion
A safety protection and ammonia gas technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve problems such as lack of monitoring, hidden dangers, hidden safety hazards, etc., to ensure safety and reliability, facilitate entry and investigation, The effect of improving reliability
Inactive Publication Date: 2019-03-29
ANHUI CONCH GRP +2
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Problems solved by technology
[0004] However, the ammonia system in the refrigeration room of the carbon dioxide capture system produced by cement in the prior art has serious safety hazards. If liquid ammonia and ammonia gas leak, lack of monitoring and failure to find out in time will cause great hidden dangers
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[0027] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.
[0028] Such as figure 1 The structure of the present invention shown is a safety protection system for preventing the diffusion of liquid ammonia, which is applied to a recovery device for carbon dioxide in the flue gas of a cement kiln. The recovery device includes a compressor 2 and an evaporative condenser 3 . In the present invention, the liquid ammonia for liquefaction and cooling of carbon dioxide is provided by a refrigeration system. Refrigeration system adopts compressor 2, and its structure is screw type ammonia compressor.
[0029] Gaseous ammonia enters the screw compressor for compression, enters the evaporative conde...
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The invention discloses a control method of a safety protection system for preventing liquid ammonia diffusion. The method comprises the following steps that when one or more ammonia gas detectors (5)detect the phenomenon that a concentration of a poisonous gas in a refrigerating machine set workshop reaches an alarm value, an ammonia gas detector control box outputs an alarm signal to a DCS system and an electrical control loop; and the DCS system and the electrical control loop achieve interlocking through software and hardware respectively so as to send a starting instruction to a ventilator (4) and a spraying switch ball valve (7). By the adoption of the technical scheme, the method has the advantages that when liquid ammonia or ammonia gas of a liquid ammonia refrigerating machine and a pipeline of the liquid ammonia refrigerating machine leaks in a closed environment, through the alarm signal sent through the ammonia gas detectors, interlocking with the ventilator and the spraying device is achieved through hardware in an ammonia refrigerating machine room for automatic ventilation and spraying so as to reduce the content of the indoor ammonia gas, and dilute ammonia water,and the safety and the reliability of an ammonia system of the refrigerating machine room are guaranteed; and reliability is improved through software interlocking, a guarantee is provided for subsequent maintenance by maintenance persons, and the maintenance persons can conveniently enter into the room and check.
Description
technical field [0001] The invention belongs to the technical field of flue gas treatment process equipment in cement production. More specifically, the present invention relates to a control method of a safety protection system for preventing liquid ammonia from spreading. Background technique [0002] The production device for recovering carbon dioxide in the flue gas of cement kiln is useful for controlling and mitigating CO in electricity and cement production in my country. 2 Emissions are of great significance. In the Paris Agreement, my country committed to peak carbon dioxide emissions before 2030. Therefore, it is necessary to strengthen energy resource conservation and ecological environment protection, enhance sustainable development capabilities, develop and promote advanced and applicable technologies for conservation, substitution, recycling, and pollution control, increase investment in energy conservation and environmental protection, and focus on strengthen...
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IPC IPC(8): F27D17/00F27D21/00F27D21/04G08B21/16B01D53/18A62C3/06
Inventor 汪鹏飞陈永波徐刚王礼龙王其辉俞庆周湘夏雁飞汪晓明
Owner ANHUI CONCH GRP