Can hot water at 60~90 degrees be used as the heat source for lithium bromide units?
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 at 23:37. 30% of the evaporated hot water in our facility is not utilized; we intend to use lithium bromide units to produce low-temperature water for cooling alkalis. I wonder if it’s possible? Thank you! # ， ， &
It should be feasible; hot water is used merely as a heat source to help concentrate the dilute lithium bromide solution. It’s necessary to contact the manufacturer and outline your requirements so that a customized solution can be developed
Although hot water can serve as a heat source, lithium bromide dilute solutions also require a heat source for concentration. As mentioned on the second floor, it depends on the design provided by the equipment manufacturer. From what I understand, most domestic manufacturers of lithium bromide units seem to have insufficient temperature capabilities.
An estimation can be made using a heat exchanger with copper tubes, and then the appropriate lithium bromide concentration can be selected based on the evaporation conditions of lithium bromide; ultimately, it may be necessary to use a custom-designed heat exchanger for the lithium bromide system, which would result in higher investment costs.
It should be possible to use water at this temperature; the key issue is that water at this temperature, especially at 60 degrees, has a low thermal quality. As a result, the size of the unit becomes large, energy consumption increases, and the amount of cooling water produced is limited, which makes it uneconomical from an economic perspective. Water at 90 degrees can be used just fine, and it will yield much better results than water at 60 degrees. There are precedents in China of hot water generated by hot water boilers in triple-chloride hydrochloric acid synthesis furnaces being used with lithium bromide units.
This portion of hot water can be used as heat-retaining water for 50% alkali; using steam for heat retention causes significant local corrosion to the 50% alkali. It can also be used to provide bathrooms, or turned directly into salt – it’s not wasted no matter how it’s used
There are hot water units that utilize reaction heat; you can contact the manufacturer. I know Dalian Sanyo and Changsha Yuanda provide equipment. Our company uses synthesized heat converted from hot water as the heat source, with the water temperature generally above 95 degrees. The evaporation of alkalis in lithium bromide hot water poses risks; the presence of alkalis can cause significant damage to the copper pipes in the unit.
The concern that hot water may become alkaline is indeed a significant issue. The solution is to install a heat exchanger between the hot water used for evaporation and the hot water utilized by the equipment, so that the water used for evaporation does not come into direct contact with the equipment.