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A concentration system and light brine technology, applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problem of high energy consumption in the evaporation and crystallization process, achieve less public works, less total project investment, running smooth effect
Pending Publication Date: 2020-12-15
ЦИНХАЙ СОЛТ ЛЕЙК ИНДАСТРИ ГРУП КО ЛТД
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[0003] In view of the above existing problems, the object of the present invention is to provide a light brine concentration system and process to solve the problem of high energy consumption in the existing evaporation crystallization process
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Embodiment 1
[0028] Embodiment 1, a kind of light brine concentration system of the present embodiment, refer to figure 1 As shown, it includes: a first condensate preheater 101, a second condensate preheater 102, a steam heat exchanger 103, a falling film heater 104, a falling film separator 105, a first compressor 106, a first condensing Liquid tank 107, first condensate pump 108, forced circulation separator 109, second compressor 110, second stage heater 111, second condensate tank 112, second condensate pump 113, discharge pump 114, first A circulation pump 115 , a first vacuum pump 116 , a second circulation pump 117 , a second vacuum pump 118 , a first spray pump 119 , a second spray pump 120 , a feed tank 121 , and a feed pump 122 .
[0029] The connection relationship and workflow of the above devices are as follows:
[0030]The dechlorinated light brine from caustic soda first enters the feed tank 121 and is transported to a number of equipment for evaporation. The feed liquid ...
Embodiment 2
[0057] Embodiment 2, the light brine concentration process of this embodiment is implemented by using the light brine concentration system of the above embodiment, see figure 2 shown, including the following main steps:
[0058] S201, preheating step
[0059] After the feed liquid is preheated, it enters the falling film heater.
[0060] S202, step of evaporating a falling film heater
[0061] The feed liquid is evaporated in the falling film heater, and after separation, the first section of secondary steam and the first section of concentrated liquid are generated; the first section of secondary steam is compressed; the compressed first section The secondary steam heats the feed liquid; during the heating process, the secondary steam condenses into water in the first stage, and the condensed water participates in the preheating of the feed liquid.
[0063] The first-stage concentrated liquid enter...
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Abstract
The invention provides a light salt brine concentration system and process, relates to the field of environmental protection, and aims to solve the problem of high energy consumption of an existing evaporative crystallization process. According to the method, the byproduct light salt brine in the electrolysis process of the caustic soda workshop can be completely recycled after dechlorination, onepart of the light salt brine is used as salt monohydrate, and the other part of the light salt brine needs to enter the salt monohydrate after being evaporated and concentrated through the MVR technology. The dechlorinated light salt brine enters a feeding tank and passes through a two-stage condensed water preheater and a steam preheater to preheat materials, the preheated materials are conveyedto a falling film heater through a feeding pump to be heated, evaporated and concentrated, secondary steam enters a falling film separator, and concentrated liquid enters a second-stage separator tobe continuously evaporated; materials from the first-stage concentration system enter a second-stage separator to be heated, evaporated and concentrated, secondary steam enters the separator, and concentrated brine obtained after evaporation and concentration is sent to a caustic soda workshop. The light salt brine concentration system and process disclosed by the invention are low in energy consumption and low in operation cost.
Description
technical field [0001] The invention relates to the technology in the field of environmental protection, in particular to a light brine concentration system and process. Background technique [0002] At present, the treatment process of industrial brine has penetrated into many fields, such as chemical industry, food, paper making, medicine, sewage treatment, seawater desalination and other fields. However, the existing process has high energy consumption and high operating costs. Especially in recent years, the market price of steam has risen, and the cost of steam operation has become higher and higher, and the burden on enterprises has increased sharply. Reducing the operating cost of device steam and saving energy is an urgent problem to be solved in the current evaporation crystallization process. If the steam consumption can be reduced, the energy saved will be considerable, and the economic benefits will also be very significant. Contents of the invention [0003] ...
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