Continuous volume expanding evaporator and using method thereof
A technology of expansion evaporation and evaporator plate, which is applied in the field of continuous expansion evaporators, can solve the problems of increased neutralization and processing difficulty, unfavorable social and environmental protection, waste of energy, etc.
Active Publication Date: 2008-07-23
俞国兴
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Problems solved by technology
However, a large amount of waste liquid alkali will be produced in the mercerizing process. If it is not recycled in time, it will not only waste energy, but also cause environmental pollution, and increase the pH value of sewage treatment. environmental protection
Method used
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[0023] As shown in the figure: there are several expansion units 14 in the expansion body 8, and a heat exhaust chamber 5 is arranged on one side of the expansion body 8, and the output end of the heat exhaust chamber 5 is connected to a secondary heater 4, and is set on the boiling chamber 2 Large liquid catcher 3 and concentrated alkali outlet 25; a condenser 28 is set in each expansion unit 14 and the upper part of the heat exhaust chamber 5, and an evaporator 32 is set at the bottom of each expansion unit 14, and two adjacent expansion units The condensers 28 of the units 14 are communicated with each other by the condensing pipe 7, and the evaporators 32 of two adjacent expansion units 14 are communicated with each other by the guide tube 33; The condensed water pipe 30 communicated with the condensed water bucket 18 is provided with the waste light alkali inlet pipe 16 under the heat discharge chamber 5, and the liquid inlet pipe 12 communicated with the external heater 1...
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The invention belongs to a device used for distilling and concentrating chemical liquids and recycling chemical products, in particular to a continuous expansion evaporator which can concentrate and reuse waste thin alkali and a method thereof. According to the technical proposals provided by the invention, a plurality of expansion units are arranged in a expansion body, and a heat removal chamber is arranged on one side of the expansion body, and the output end of the heat removal chamber is connected with a secondary heater, and a big liquid catcher and a thick alkali outlet are arranged in a boiling chamber; a condenser is respectively arranged in each expansion unit and the heat removal chamber; a cesspit is arranged in each expansion unit, and a condensed water pipe communicated with a condensed water bucket is arranged on the cesspit; a waste thin alkali inlet pipe is arranged on the lower part of the heat removal chamber, and a liquid feeding pipe communicated with an external heater is arranged on the condenser of a first-level expansion unit; a liquid draining pipe of the external heater is communicated with an evaporating disk of the first-level expansion unit; the external heater adopts a water distributor to drain the condensed water in the heater. The invention can be used for recycling and utilizing chemical liquids so as to reduce pollution to environment.
Description
technical field [0001] The invention belongs to equipment for distilling and concentrating chemical liquids and recycling chemical products, in particular to a continuous capacity expansion evaporator capable of concentrating waste light alkali and reusing it and its use method. Background technique [0002] PH type continuous expansion evaporator is a kind of negative pressure evaporation and concentration equipment. It is suitable for the concentration and reuse of waste light alkali in printing and dyeing enterprises and the concentration of chemical liquids in chemical distillation. The so-called expansion means that its main function is that a certain liquid is suddenly released after being pressurized under certain conditions to produce a capacity expansion effect. ideal concentration. [0003] In the production process of printing and dyeing enterprises, there is a necessary process - mercerizing. Only after mercerizing can the technical requirements of the cloth su...
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IPC IPC(8): B01D1/00
Inventor 俞国兴
Owner 俞国兴