The working principle of the Cng pressure reducing device is: when the high temperature and high pressure superheated steam supplied by the thermal power plant is delivered to each steam point, the pressure and temperature of the superheated steam must be input to the required saturation state (usually close to the saturation temperature and then sent to the heat exchange equipment use.

    There are two basic types of Cng pressure reducing devices. The non-contact Cng pressure reducing device is not in contact with the direct Cng pressure reducing device. Steam and gas can be used as cooling medium. The surrounding air can also be used as the cooling medium of the Cng pressure reducing device. This thermostat is like a shell-and-tube heat exchanger.
 Cng pressure reducing device superheated steam temperature control, adjustable: inlet superheated steam flow or cooling medium flow. 2 The direct contact medium of the cooling steam (usually water) is directly mixed with the superheated steam, as shown in the following figure: Venturi tube and direct injection cooling and pressure reduction system. The Cng pressure reducing device decompresses first, and then enters the pressure reducer. The Cng pressure reducing device adds a certain amount of cooling water through the atomizing mixing device in the desuperheater. So it can produce dry steam. In this way, damage to pipes and equipment can be avoided.

    The atomization quality of the desuperheated water of the Cng pressure reducing device will directly affect the control performance of the desuperheated water system. Different types of desuperheaters of Cng pressure reducing device adopt different desuperheating water atomization methods. It is worth noting that physical and chemical droplets are mixed with steam. The evaporation of water droplets (and steam cooling) is a time-consuming process that will not be completed in an instant. Therefore, the installation design of the downstream pipeline is also very important to obtain a good view.

    It takes a long time for the superheated steam and coolant to mix. If the mixing is not good, the water cannot effectively absorb the heat of the superheated steam, and the evaporation process of the water droplets is not complete, causing the water droplets to overflow downstream of the desuperheater, and the outlet temperature cannot be guaranteed. To ensure this, the downstream pipeline should maintain a relatively high flow rate. To maintain sufficient turbulence in the downstream pipeline.

    The speed of the Cng pressure reducing device is faster than the general steam distribution system, which is why the desuperheater and the corresponding pipes are usually (not all) smaller than the steam distribution system pipes. You can also use city tap water or process water, but this depends on the hardness of the water supply. Scale may accumulate inside the cooling nozzle of the desuperheater and on the inner surface of the pipe downstream of the desuperheater.