Technical features of converting evaporation steam injection devices into hydraulic injection devices
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1. The modified process utilizes a water closed-loop circulation, which ensures stable operational performance and facilitates process control; it also overcomes the adverse effects caused by fluctuations in steam pressure. 2. The desorption load was reduced; vacuum creation through hydraulic jetting resulted in a reduction of the amount of surface cooling fluid by over 1 ton per hour. Due to the reduced desorption load, the amount of steam required for desorption also decreases, which helps to save steam. This also creates conditions for utilizing the ammonia sent in from outside. 3. The ammonia content in the first and second stage (B) injectors is recovered, thereby purifying the atmosphere and contributing to environmental protection. 4. In terms of control, the water in the circulating water system will be analyzed regularly; when the ammonia concentration in the system reaches a certain level, the water in the system will be replaced in order to reduce the ammonia content and ensure the normal and stable operation of the hydraulic jet device. 5. A water temperature monitoring system should be installed at the outlet of the heat exchanger to facilitate control of the water temperature there, ensuring that it remains below the 50°C requirement specified in the process parameters, thus enabling the system to operate stably and properly. 6. The hydraulic ejector used in this modification scheme is a double-suction hydraulic ejector; compared with ordinary single-nozzle, single-suction ejectors, its injection efficiency can be increased by 40% and its vacuum level can be improved by 45%. The principle behind this is as follows: when the water pressure entering the ejector is 450 KPa, there is still a residual pressure of 200 KPa at the outlet of the first nozzle of the double-suction design. This hydraulic ejector makes good use of this residual pressure, thereby achieving simultaneous improvements in injection efficiency and vacuum level.
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The best approach is to use carbon amine solution for vacuuming, rather than circulating water
Using water instead of steam for vacuuming is a good idea! But can recycled water be used? Interested. What are the negative impacts?
The hydraulic jetting device uses water; originally, desalinated water was intended for this purpose, but this leads to an increase in the amount of water returning to the system. During the renovation, we replaced the desalinated water with surface condensate, which achieves the same results while also reducing the amount of water that needs to be added to the system. This results in better energy savings.
It should also be noted that after switching to water spray, the steam to the booster must not be stopped; otherwise, crystallization may occur in the subsequent equipment and block the tubes, leading to serious consequences that require a shutdown for handling.