Air cooling tower is also a kind of hybrid heat exchanger. In order to make the cooling water fully contact with the air and mix strongly, to increase the heat transfer area and enhance the heat transfer, "packed tower" or "sieve plate tower" is usually used. It can also be used in hollow spray tower.According to the expander outlet temperature T2 and pressure P2, the corresponding specific enthalpy H2 can be found from the ordinate. The ideal adiabatic expansion process should be isentropic expansion process. The ideal specific enthalpy value when expanding to the same outlet pressure P2 can draw a vertical line through the state point 1 at the inlet to obtain the intersection 2T of the isobaric line with the outlet pressure P2, which is the outlet state point of ideal expansion. Its specific enthalpy h 2T can be found on the ordinate.If the water pump is started first, the water level in the air cooling tower will be too high, even higher than the elevation of the air inlet pipe, which will increase the resistance of the outlet pipe of the air compressor and cause the surge of the turbine air compressor. Some equipment require that the circulating water pump can be started only when the pressure in the air cooling tower is higher than 0.35Mpa (gauge pressure). During operation, when the pressure is lower than this value, the water pump should stop automatically.
Adjust the excess hydrogen in hydrodeaeration to meet the process requirements. Adjust the working conditions of the deaerator, and the furnace temperature is generally stable between 350 ℃ and 450 ℃ (if the furnace temperature does not meet the requirements, the palladium metal on the surface of the palladium catalyst may be lost due to long-term use, and the efficiency will be reduced, so the palladium catalyst can be replaced);DEAR Biogas purification unit.If the liquefier appears liquid too early, it means that the liquefier is connected too early. If there is liquid in the liquefier before the temperature condition of the switching heat exchanger is established, the amount of backflow gas in the switching heat exchanger will be reduced due to the generation of liquid, so that the self cleaning can not be guaranteed.DEAR Biogas purification unit.Condensation is the reverse process of evaporation. For pure matter, the condensation temperature is also called liquefying temperature, which is equal to the evaporation temperature under the same pressure. The saturation temperature can unify them.
DEAR Biogas purification unit.Water cooling tower is a kind of hybrid heat exchanger. The purpose is to lower the temperature of the cooling water in the cooling tower after cooling the air, so that it can be recycled in the air cooling tower. Different types are to strive to enhance heat transfer, improve cooling effect, while the flow resistance should be as small as possible, so that water is not easy to scale.DEAR Biogas purification unit.The oxygen content in nitrogen should be reduced in the adjustment. Extend the continuous operation cycle of the equipment, reduce the downtime maintenance time. Therefore, it is necessary to strengthen the daily maintenance of the equipment and overhaul the equipment regularly. To ensure the removal effect of water and carbon dioxide. Absolutely avoid the leakage of low temperature liquid and gas in the tower. When heating the single equipment, the temperature should not be too high.In the liquid accumulation stage, in order to accelerate the accumulation of liquid, it is necessary to give full play to the maximum refrigeration potential of the expander and run several expanders in full capacity. In order not to make the expander temperature too low, the method of increasing the central suction or circulating current is adopted to increase the temperature in front of the expander.
