Energy-saving emission-reducing process for atmospheric and vacuum distillation unit
A technology of energy-saving and emission-reduction, atmospheric and vacuum distillation, which can be applied to machines using waste heat, the operation mode of machines, climate change adaptation, etc., and can solve the problems of small scale, poor versatility, and small temperature difference.
Active Publication Date: 2015-11-11
NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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Problems solved by technology
The oil refining industry, especially the atmospheric and vacuum devices in oil refineries, has not yet seen relevant information. The heat pumps currently used have a common feature: small scale, small temperature difference, and mostly dedicated heat energy, poor versatility, and poor adjustment and distribution.
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Embodiment 1
[0011] As attached figure 1 As shown, the embodiment of the present invention is a set of 2.5 million tons / year atmospheric and vacuum unit energy saving and emission reduction process. This process uses the principle of heat pump and uses desalinated water as the circulating working medium to carry the vacuum distillate from the atmospheric and vacuum unit The heat energy is taken out by vaporization from five groups of evaporative coolers connected in parallel, cooled by the second-stage compression limit condition and the third group is compressed, and then enters the 1.1MPa(a) steam generator to produce external steam, and the cycle process After the mass is throttled and decompressed, it enters the 0.3MPa(a) exhaust steam generator to produce external exhaust steam. The working fluid leaving the exhaust steam generator is throttled in two stages, and after two stages of heat exchange and cooling, it returns to the parallel connection The five sets of evaporative coolers com...
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The invention relates to an energy-saving emission-reducing process for an atmospheric and vacuum distillation unit. The key point of the process is that by virtue of the heat pump principle, a conventional process of cooling softening water by circulating water and then cooling decompression distillated oil and residual oil by softening water is changed into the energy-saving emission-reducing process, so that wasted much low-temperature heat energy is converted into universal steam power for use of oil refining equipment. According to the energy-saving emission-reducing process, the heat pump technology is flexibly utilized, so that possible problems such as gas pollution at the top of a circulating water cooling tower, continuous and discontinuous sewage disposal pollution of circulating water, heat pollution of a steam boiler, pollution caused by smoke dust as well as sulfides, nitrides, CO and CO2, waste residue pollution and the like are avoided, thereby achieving the energy-saving emission-reducing purpose.
Description
technical field [0001] The invention belongs to the field of heat energy recovery, and in particular relates to an energy-saving and emission-reduction process for an atmospheric and vacuum device. Background technique [0002] In large atmospheric and vacuum devices, in order to prevent fouling of equipment pipelines when the circulating water is directly cooled, it has to be cooled by demineralized water, and then the demineralized water is cooled by factory circulating water. The heat carried by the circulating water is released into the atmosphere in the form of steam through the cooling tower , causing thermal pollution and air pollution to the atmosphere, the continuous and intermittent sewage discharge of circulating water also pollutes the environment, and the construction of steam boilers also contains smoke, SO X , NO X , CO X , slag, waste water and other pollutants. It can be seen that the abandonment of low-temperature heat energy is not only a waste of energ...
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IPC IPC(8): F22B1/00F25B27/02
CPCY02A30/274
Inventor 胡德树王秀珍赵喜陈宝菲徐建
Owner NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV