Source of cooling water

We use deoxygenated water at a temperature of 104 degrees and a pressure of 5.4 megapascals. The quality of the steam condensate is acceptable, but the temperature is relatively high. Based on the principle that the heat obtained from the cooling water is equal to the heat lost by the steam in the pipeline, the required amount of cooling water can be calculated: W1(H1-H3) = W2(H3-H2), where W1 is the mass of the inlet steam, H1 is the enthalpy of the inlet steam, W2 is the mass of the cooling water, H2 is the enthalpy of the cooling water, and H3 is the enthalpy of the outlet steam. The enthalpy value can be found using the enthalpy and humidity tables for water and steam, based on the pressure and temperature of the medium. As can be seen from the above, as pressure and temperature increase, the amount of water required for cooling increases. Higher requirements for pipes and control valves

Most use deoxygenated water, with good temperature and pressure conditions.

The temperature is generally 104 degrees, and the pressure should not exceed 21 Kpa. The water used for cooling is mainly supplied from deionized water; other sources include water from the drain tank and circulating water. After being deoxygenated in the deaerator, this water is sent to the economizer. (*^__^*) Hehe……

The desuperheating water can be deoxygenated water, or it can be water from the economizer outlet; this depends on the specifications outlined in the boiler design.

Question: What are the sources of cooling water? 1) Desalinated water 2) Is steam condensate also acceptable? 3) What are the temperature and pressure requirements? =============================== 1. Source: As long as it can ensure no contamination of the steam quality, provided the pressure is higher than that of the steam, it can absorb the latent heat of vapor to lower the steam temperature, and it can provide a stable and reliable supply, then there is no problem. 2. Therefore, in terms of water quality and stability, the desalinated water meets the requirements. But it is not as good as deoxygenated water; the oxygen in water causes corrosion to pipes and has a slight impact on steam. Moreover, desalinated water is usually at normal temperature and pressure, requiring a pressure pump, and the temperature difference is also quite large. 3. Steam condensate has unstable water quality and volume, and the pipelines are prone to water hammer. The key issue is that its pressure is lower than that of steam; therefore, it is difficult to achieve high temperature and pressure. 4. Temperature: As long as it is in a liquid state and can absorb heat, latent heat will suffice. The pressure must be several kilograms higher than that of steam. 5. The deoxygenated water at the outlet of the high-pressure feed water pump meets the requirements best.

The steam desuperheating water can be either deionized water or steam condensate, but in both cases it needs to be deoxygenated. In most cases, the steam desuperheating water is obtained by running a pipe from the outlet of the boiler feed pump to the desuperheater; the advantages of this approach are as follows: 1. The quality of the desuperheating water is ensured ； 2. The pressure remains stable and can reach the required level, eliminating the need for a separate cooling water pump.

Also, does it refer to the water used for the boiler superheater desuperheater? Why does everyone assume it to be the case? It could also be the water used for reducing temperature in the dual-reduction system, or the water used for reducing temperature in heating systems; so it’s hard to say

After coming out of the boiler feed pump, just add a branch pipe; the pressure will definitely be higher than that of the steam, so pressure reduction is necessary.

Our hydrogen production plant uses process condensate or boiler feed water.